JP7628985B2 - Vehicle and heat exchange plate - Google Patents

Description

This disclosure relates to a vehicle and a heat exchange plate.

Patent Document 1 discloses the following configuration: A power supply device for a vehicle includes a battery block formed by connecting multiple battery cells, a cooling plate that is thermally coupled to the battery cells of the battery block and cools the battery cells with a supplied refrigerant, a cooling mechanism that supplies refrigerant to the cooling plate, and a control circuit that controls the cooling mechanism to control the cooling state of the cooling plate. The cooling plate has a watertight hollow portion inside, and this hollow portion is filled with a cooling liquid that equalizes the temperature of the cooling plate. Furthermore, the cooling plate is provided with a heat exchanger that cools the cooling liquid with the heat of vaporization of the refrigerant. The power supply device cools the heat exchanger with the heat of vaporization of the refrigerant circulated through the heat exchanger of the cooling plate, and the heat exchanger cools the cooling liquid, which then cools the battery cells.

JP 2010-50000 A JP 2008-44476 A Patent No. 6098121

If the temperature of the plates that cool a vehicle battery is uneven, the battery will be cooled unevenly. Uneven cooling of the battery will have a negative impact on the battery's performance and lifespan.

The purpose of this disclosure is to provide technology that can cool vehicle batteries more uniformly.

One aspect of the present disclosure is
The car body and
A first wheel and a second wheel coupled to the vehicle body;
A secondary battery disposed along a predetermined surface of the vehicle body;
a heat exchange plate disposed along the predetermined surface in the vehicle body;
an electric motor that drives at least the first wheel by using electric power supplied from the secondary battery;
A vehicle capable of moving in a predetermined direction by the first wheel and the second wheel,
The heat exchange plate is
a first surface disposed along the predetermined surface and capable of exchanging heat with the secondary battery;
a second surface disposed along the predetermined surface and opposite the first surface;
A first end portion in the predetermined direction;
a second end opposite the first end in the predetermined direction;
a refrigerant input portion disposed at the first end through which a refrigerant enters the heat exchange plate;
a refrigerant output portion disposed at the first end portion through which the refrigerant exits the heat exchange plate;
a first refrigerant flow path connected to the refrigerant output portion and disposed along the predetermined direction between the first surface and the second surface;
a second refrigerant flow path connected to the refrigerant output portion and disposed along the predetermined direction between the first surface and the second surface;
a third refrigerant flow path connected to the refrigerant input portion and disposed along the predetermined direction between the first surface and the second surface and between the first refrigerant flow path and the second refrigerant flow path;
a first connection refrigerant flow path connecting the third refrigerant flow path and the first refrigerant flow path between the first surface and the second surface;
a second connection refrigerant flow path connecting the third refrigerant flow path and the second refrigerant flow path between the first surface and the second surface, wherein the refrigerant entering the heat exchange plate from the refrigerant input portion can move from the third refrigerant flow path through the first connection refrigerant flow path and the first refrigerant flow path to the refrigerant output portion, and the refrigerant entering the heat exchange plate from the refrigerant input portion can move from the third refrigerant flow path through the second connection refrigerant flow path and the second refrigerant flow path to the refrigerant output portion,
The heat exchange plate further includes a first coolant input/output portion disposed at the first end portion through which a coolant flows into and out of the heat exchange plate.
a second coolant input/output portion disposed at the first end portion and through which the coolant inputs and outputs to the heat exchange plate;
a first coolant flow path connected to the first coolant input/output portion and disposed along the predetermined direction between the first surface and the second surface;
a second coolant flow path connected to the second coolant input/output portion and disposed along the predetermined direction between the first surface and the second surface;
a first connecting coolant flow path that connects a portion of the first coolant flow path that is closer to the second coolant flow path than the third coolant flow path and a portion of the second coolant flow path that is closer to the third coolant flow path than the second coolant flow path, at the second end;
a second connecting coolant flow path that connects a portion of the first coolant flow path that is closer to the third coolant flow path than the second coolant flow path and a portion of the second coolant flow path that is closer to the first coolant flow path than the third coolant flow path, at the second end,
the cooling liquid that has entered the heat exchange plate from the first cooling liquid input/output portion can move from the first cooling liquid flow path to the second cooling liquid input/output portion via the first connecting cooling liquid flow path and the second cooling liquid flow path, and the cooling liquid that has entered the heat exchange plate from the first cooling liquid input/output portion can move from the first cooling liquid flow path to the second connecting cooling liquid flow path and the second cooling liquid flow path to the second cooling liquid input/output portion.
Provide the vehicle.

One aspect of the present disclosure is
The car body and
A first wheel and a second wheel coupled to the vehicle body;
A secondary battery disposed along a predetermined surface of the vehicle body;
an electric motor that drives at least the first wheel by using electric power supplied from the secondary battery;
A heat exchange plate that can be installed on a vehicle that can move in a predetermined direction by the first wheel and the second wheel,
a first surface disposed along the predetermined surface and capable of exchanging heat with the secondary battery;
a second surface disposed along the predetermined surface and opposite the first surface;
A first end portion in the predetermined direction;
a second end opposite the first end in the predetermined direction;
a refrigerant input portion disposed at the first end through which a refrigerant enters the heat exchange plate;
a refrigerant output portion disposed at the first end portion through which the refrigerant exits the heat exchange plate;
a first refrigerant flow path connected to the refrigerant output portion and disposed along the predetermined direction between the first surface and the second surface;
a second refrigerant flow path connected to the refrigerant output portion and disposed along the predetermined direction between the first surface and the second surface;
a third refrigerant flow path connected to the refrigerant input portion and disposed along the predetermined direction between the first surface and the second surface and between the first refrigerant flow path and the second refrigerant flow path;
a first connection refrigerant flow path connecting the third refrigerant flow path and the first refrigerant flow path between the first surface and the second surface;
a second connection refrigerant flow path connecting the third refrigerant flow path and the second refrigerant flow path between the first surface and the second surface, wherein the refrigerant entering the heat exchange plate from the refrigerant input portion can move from the third refrigerant flow path through the first connection refrigerant flow path and the first refrigerant flow path to the refrigerant output portion, and the refrigerant entering the heat exchange plate from the refrigerant input portion can move from the third refrigerant flow path through the second connection refrigerant flow path and the second refrigerant flow path to the refrigerant output portion,
The heat exchange plate further includes a first coolant input/output portion disposed at the first end portion through which a coolant flows into and out of the heat exchange plate.
a second coolant input/output portion disposed at the first end portion and through which the coolant inputs and outputs to the heat exchange plate;
a first coolant flow path connected to the first coolant input/output portion and disposed along the predetermined direction between the first surface and the second surface;
a second coolant flow path connected to the second coolant input/output portion and disposed along the predetermined direction between the first surface and the second surface;
a first connecting coolant flow path that connects a portion of the first coolant flow path that is closer to the second coolant flow path than the third coolant flow path and a portion of the second coolant flow path that is closer to the third coolant flow path than the second coolant flow path, at the second end;
a second connecting coolant flow path that connects a portion of the first coolant flow path that is closer to the third coolant flow path than the second coolant flow path and a portion of the second coolant flow path that is closer to the first coolant flow path than the third coolant flow path, at the second end,
the cooling liquid that has entered the heat exchange plate from the first cooling liquid input/output portion can move from the first cooling liquid flow path to the second cooling liquid input/output portion via the first connecting cooling liquid flow path and the second cooling liquid flow path, and the cooling liquid that has entered the heat exchange plate from the first cooling liquid input/output portion can move from the first cooling liquid flow path to the second connecting cooling liquid flow path and the second cooling liquid flow path to the second cooling liquid input/output portion.
A heat exchange plate is provided.

This disclosure allows vehicle batteries to be cooled more uniformly.

FIG. 1 is a plan view showing a configuration example of a vehicle according to a first embodiment; FIG. 1 is a left side view showing a configuration example of a vehicle according to a first embodiment; FIG. 1 is a diagram for explaining an example of an electric circuit provided in a vehicle according to a first embodiment; FIG. 1 is a perspective view showing a configuration example of a battery pack according to a first embodiment; 5 is a cross-sectional view of the battery pack shown in FIG. 4 taken along line AA. FIG. 1 is a plan view showing a configuration example of a refrigerant layer according to a first embodiment; FIG. 1 is a plan view showing a configuration example of a coolant layer according to a first embodiment; FIG. 1 is a plan view showing an example of a positional relationship between a refrigerant layer and a cooling liquid layer according to a first embodiment; FIG. 1 is a perspective view showing an example of a configuration in which a first connecting coolant flow channel and a second connecting coolant flow channel cross each other at an intersection in a three-dimensional manner according to a first embodiment; FIG. 2 is a plan view showing a configuration example in which a first connecting coolant flow channel and a second connecting coolant flow channel cross each other at an intersection in the first embodiment; FIG. 11 is a plan view showing a configuration example of a heat exchange plate according to a second embodiment; FIG. 11 is a diagram for explaining a case where the circulation direction of the cooling liquid is switched in the heat exchange plate according to the second embodiment. FIG. 13 is a plan view showing a configuration example of a heat exchange plate according to the third embodiment;

Below, the embodiments of the present disclosure will be described in detail with reference to the drawings as appropriate. However, more detailed explanation than necessary may be omitted. For example, detailed explanation of already well-known matters and duplicate explanation of substantially identical configurations may be omitted. This is to avoid the following explanation becoming unnecessarily redundant and to facilitate understanding by those skilled in the art. Note that the attached drawings and the following explanation are provided to enable those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter described in the claims.

(Embodiment 1)
<Vehicle configuration>
Fig. 1 is a plan view showing a configuration example of a vehicle 1 according to embodiment 1. Fig. 2 is a left side view showing the configuration example of a vehicle 1 according to embodiment 1.

For ease of explanation, the axis extending in the height direction of the vehicle 1 is the Z-axis as shown in Figs. 1 and 2. The axis perpendicular to the Z-axis (i.e., parallel to the ground) and extending in the direction of travel of the vehicle 1 is the Y-axis. The axis perpendicular to the Y-axis and Z-axis (i.e., the axis in the width direction of the vehicle 1) is the X-axis. For ease of explanation, the positive direction of the Z-axis may be referred to as "up", the negative direction of the Z-axis as "down", the positive direction of the Y-axis as "front", the negative direction of the Y-axis as "rear", the positive direction of the X-axis as "right", and the negative direction of the X-axis as "left". These expressions are also used in other drawings that depict the XYZ axes. These expressions relating to directions are used for ease of explanation and are not intended to limit the position of the structure during actual use.

As shown in FIG. 1 or FIG. 2, the vehicle 1 includes a vehicle body 2, wheels 3, an electric motor 4, and a battery pack 10.

The battery pack 10 is accommodated in the vehicle body 2. The battery pack 10 has one or more secondary batteries 30 (see FIG. 4) that can be charged and discharged. An example of the secondary battery 30 is a lithium ion battery. There may be one or more secondary batteries 30 described below. The secondary battery 30 supplies (discharges) stored power to the electric motor 4 and the like. The secondary battery 30 may store (charge) power generated by the electric motor 4 using regenerative energy. The battery pack 10 may be accommodated under the floor in the center of the vehicle body 2, as shown in FIG. 1. Details of the battery pack 10 will be described later.

The wheels 3 are coupled to the vehicle body 2. Although Figs. 1 and 2 show a car with four wheels 3, the vehicle 1 may have at least one wheel 3. For example, the vehicle 1 may be a motorcycle with two wheels 3, or a vehicle with three or five or more wheels 3. One of the wheels 3 of the vehicle 1 may be referred to as the first wheel 3a, and one of the wheels 3 other than the first wheel 3a may be referred to as the second wheel 3b. The first wheel 3a may be the front wheel of the vehicle 1, and the second wheel 3b may be the rear wheel of the vehicle 1. The vehicle 1 can move in a predetermined direction (for example, the front-rear direction) by the first wheel 3a and the second wheel 3b.

The electric motor 4 drives at least one wheel 3 (e.g., the first wheel 3a) using power supplied from the secondary battery 30. The vehicle 1 includes at least one electric motor 4. The vehicle 1 may be configured such that the electric motor 4 drives the front wheels (i.e., front-wheel drive). Alternatively, the vehicle 1 may be configured such that the electric motor 4 drives the rear wheels (i.e., rear-wheel drive), or such that the electric motor 4 drives both the front and rear wheels (i.e., four-wheel drive). Alternatively, the vehicle 1 may be configured such that multiple electric motors 4 each individually drive a wheel 3. The electric motor 4 may be installed in a motor room (engine room) located at the front of the vehicle 1.

<Electric circuit configuration>
FIG. 3 is a diagram for explaining an example of an electric circuit provided in the vehicle 1 according to the first embodiment.

The battery pack 10 including the secondary battery 30 has a high-voltage connector and a low-voltage connector. In this disclosure, the high-voltage connector and the low-voltage connector are referred to as electrical connectors without distinction.

A high-voltage distributor may be connected to the high-voltage connector. A drive inverter, an electric compressor, an HVAC (Heating, Ventilation, and Air Conditioning), an on-board charger, and a quick-charge port may be connected to the high-voltage distributor. A CAN (Controller Area Network) and a 12V power supply system may be connected to the low-voltage connector.

The electric motor 4 may be connected to the drive inverter. That is, the power output from the secondary battery 30 may be supplied to the electric motor 4 via a high-voltage connector, a high-voltage distributor, and the drive inverter.

<Battery pack configuration>
Fig. 4 is a perspective view showing an example of the configuration of the battery pack 10 according to embodiment 1. Fig. 5 is a cross-sectional view of the battery pack 10 shown in Fig. 4 taken along line AA.

The battery pack 10 includes a housing 20, a secondary battery 30, and a heat exchange plate 100. The housing 20 houses the secondary battery 30 and the heat exchange plate 100.

The heat exchange plate 100 has, for example, a flat, approximately rectangular parallelepiped shape. The heat exchange plate 100 may be read as a heat exchanger. As shown in FIG. 5, the heat exchange plate 100 has a first surface 101 arranged along a predetermined surface, and a second surface 102 arranged along the predetermined surface. The predetermined surface may be the floor surface of the vehicle body 2. The members of the first surface 101 and the second surface 102 may be made of metal, for example, aluminum. However, the first surface 101 and the second surface 102 are not limited to being made of metal, and may be made of other materials.

The secondary battery 30 is disposed on the opposite side of the second surface 102 with respect to the first surface 101. In other words, the second surface 102, the first surface 101, and the secondary battery 30 are disposed in order of proximity to the floor surface of the vehicle body 2.

The heat exchange plate 100 has a cooling liquid layer 200 that circulates the cooling liquid and a refrigerant layer 300 that circulates the refrigerant between the first surface 101 and the second surface 102. The heat exchange plate 100 exchanges heat between at least the cooling liquid moving through the cooling liquid layer 200 and the secondary battery 30 via the first surface 101. The heat exchange plate 100 also exchanges heat between at least the cooling liquid moving through the cooling liquid layer 200 and the refrigerant moving through the refrigerant layer 300. An example of the cooling liquid is an antifreeze liquid containing ethylene glycol. An example of the refrigerant is HFC (hydrofluorocarbon).

In this embodiment, the heat exchange plate 100 is configured such that the cooling liquid layer 200 is disposed on the refrigerant layer 300. However, the heat exchange plate 100 may be configured such that the refrigerant layer 300 is disposed on the cooling liquid layer 200. The cooling liquid layer 200 may be read as a cooling liquid plate. The refrigerant layer 300 may be read as a refrigerant plate. Details of the configuration of the heat exchange plate 100, as well as the configurations of the cooling liquid layer 200 and the refrigerant layer 300 will be described later.

In addition, in this embodiment, the end of the heat exchange plate 100 in a predetermined direction (e.g., the positive direction of the Y axis) is referred to as the first end 71, and the end in the opposite direction to the first end 71 (e.g., the negative direction of the Y axis) is referred to as the second end 72. The first end 71 may be on the side in the traveling direction of the vehicle 1, and the second end 72 may be on the side opposite to the traveling direction of the vehicle 1.

As shown in FIG. 4, the first end 71 of the heat exchange plate 100 is provided with a refrigerant input section 301, a refrigerant output section 302, a first cooling liquid input/output section 201, and a second cooling liquid input/output section 202.

The refrigerant input section 301 is the section where the refrigerant enters the refrigerant layer 300 from outside the heat exchange plate 100, and the refrigerant output section 302 is the section where the refrigerant exits from the refrigerant layer 300 to outside the heat exchange plate 100.

The first coolant input/output section 201 is a section where coolant enters the coolant layer 200 from the outside of the heat exchange plate 100, and the second coolant input/output section 202 is a section where coolant exits from the coolant layer 200 to the outside of the heat exchange plate 100. Alternatively, the second coolant input/output section 202 may be a section where coolant enters the coolant layer 200 from the outside of the heat exchange plate 100, and the first coolant input/output section 201 may be a section where coolant exits from the coolant layer 200 to the outside of the heat exchange plate 100.

<Configuration of heat exchange plate>
Fig. 6 is a plan view showing a configuration example of the refrigerant layer 300 according to embodiment 1. Fig. 7 is a plan view showing a configuration example of the coolant layer 200 according to embodiment 1. Fig. 8 is a plan view showing an example of the positional relationship between the refrigerant layer 300 and the coolant layer 200 according to embodiment 1.

First, the configuration of the refrigerant layer 300 will be described with reference to FIG. 6.

The refrigerant layer 300 includes a refrigerant input section 301, a refrigerant output section 302, a first refrigerant flow path 311, a second refrigerant flow path 312, a third refrigerant flow path 313, a first connected refrigerant flow path 321, and a second connected refrigerant flow path 322.

The refrigerant input section 301, as described above, is located at the first end 71 of the heat exchange plate 100 and is the section where the refrigerant enters the refrigerant layer 300 of the heat exchange plate 100.

As described above, the refrigerant output section 302 is located at the first end 71 of the heat exchange plate 100 and is the section where the refrigerant exits the refrigerant layer 300 of the heat exchange plate 100.

The vehicle 1 is equipped with a refrigerant circuit 600 through which the refrigerant flows, and which has at least a compressor 601 and a condenser 602 connected to the refrigerant input section 301 and the refrigerant output section 302. As a result, the refrigerant coming out of the refrigerant output section 302 is cooled through the compressor 601 and the condenser 602, and the cooled refrigerant enters the refrigerant input section 301 and can exchange heat with the coolant.

The first refrigerant flow path 311 is connected to the refrigerant output section 302 and is arranged along a predetermined direction (e.g., the Y-axis direction) between the first surface 101 and the second surface 102.

The second refrigerant flow path 312 is connected to the refrigerant output section 302 and is disposed between the first surface 101 and the second surface 102 along a predetermined direction (e.g., the Y-axis direction).

The third refrigerant flow path 313 is connected to the refrigerant input section 301 and is disposed between the first surface 101 and the second surface 102, between the first refrigerant flow path 311 and the second refrigerant flow path 312, along a predetermined direction (e.g., the Y-axis direction).

The first connection refrigerant flow path 321 connects the third refrigerant flow path 313 and the first refrigerant flow path 311 between the first surface 101 and the second surface 102.

The second connection refrigerant flow path 322 connects the third refrigerant flow path 313 and the second refrigerant flow path 312 between the first surface 101 and the second surface 102.

According to this configuration, the refrigerant that enters the refrigerant layer 300 of the heat exchange plate 100 from the refrigerant input section 301 can move to the refrigerant output section 302 via the third refrigerant flow path 313, the first connected refrigerant flow path 321, and the first refrigerant flow path 311, and the refrigerant that enters the heat exchange plate 100 from the refrigerant input section 301 can move to the refrigerant output section 302 via the third refrigerant flow path 313, the second connected refrigerant flow path 322, and the second refrigerant flow path 312.

The refrigerant layer 300 may further include at least one first branch refrigerant flow path 331 and at least one second branch refrigerant flow path 332. Each first branch refrigerant flow path 331 connects the third refrigerant flow path 313 and the first refrigerant flow path 311. Each second branch refrigerant flow path 332 connects the third refrigerant flow path 313 and the second refrigerant flow path 312.

According to this configuration, the refrigerant that enters the heat exchange plate 100 from the refrigerant input section 301 can move from the third refrigerant flow path 313 to the refrigerant output section 302 via each of the first branch refrigerant flow paths 331 and the first refrigerant flow path 311, and the refrigerant that enters the heat exchange plate 100 from the refrigerant input section 301 can move to the refrigerant output section 302 via each of the second branch refrigerant flow paths 332 and the second refrigerant flow path 312.

The refrigerant exchanges heat with the cooling liquid while moving through the refrigerant flow path, so the temperature of the refrigerant tends to increase as it moves away from the refrigerant input port 301.

Therefore, the refrigerant flowing through the third refrigerant flow path 313 and the refrigerant flowing near the third refrigerant flow path 313 in each first branch refrigerant flow path 331 tend to be lower in temperature than the refrigerant flowing through the first refrigerant flow path 311 and the refrigerant flowing near the first refrigerant flow path 311 in each first branch refrigerant flow path 331. Therefore, in this embodiment, the refrigerant flowing through the third refrigerant flow path 313 and the refrigerant flowing near the third refrigerant flow path 313 in each first branch refrigerant flow path 331 are referred to as the first low-temperature refrigerant 501 (e.g., the lightly shaded portion in FIG. 6), and the refrigerant flowing through the first refrigerant flow path 311 and the refrigerant flowing near the first refrigerant flow path 311 in each first branch refrigerant flow path 331 are referred to as the first high-temperature refrigerant 511 (e.g., the darkly shaded portion in FIG. 6).

Similarly, the refrigerant flowing through the third refrigerant flow path 313 and the refrigerant flowing near the third refrigerant flow path 313 in each second branch refrigerant flow path 332 tend to be lower in temperature than the refrigerant flowing through the second refrigerant flow path 312 and the refrigerant flowing near the second refrigerant flow path 312 in each second branch refrigerant flow path. Therefore, in this embodiment, the refrigerant flowing through the third refrigerant flow path 313 and the refrigerant flowing near the third refrigerant flow path 313 in each second branch refrigerant flow path 332 are referred to as the second low-temperature refrigerant 502 (e.g., the lightly shaded portion in FIG. 6), and the refrigerant flowing through the second refrigerant flow path 312 and the refrigerant flowing near the second refrigerant flow path 312 in each second branch refrigerant flow path 332 are referred to as the second high-temperature refrigerant 512 (e.g., the darkly shaded portion in FIG. 6).

However, the terms "low temperature" and "high temperature" used in relation to these refrigerants express the relative temperature difference between the refrigerants and do not have any comparative meaning with respect to the temperature of cooling liquids, etc.

Next, the configuration of the cooling liquid layer 200 will be described with reference to Figures 7 and 8.

The cooling liquid layer 200 includes a first cooling liquid input/output section 201, a second cooling liquid input/output section 202, a first cooling liquid flow path 211, a second cooling liquid flow path 212, a first connecting cooling liquid flow path 221, and a second connecting cooling liquid flow path 222.

The first coolant input/output section 201 is located at the first end 71, and coolant enters and exits the heat exchange plate 100.

The second cooling liquid input/output section 202 is disposed at the first end 71, through which the cooling liquid enters and exits the heat exchange plate 100.

The vehicle 1 is equipped with a coolant circuit 700 that is connected to the first coolant input/output unit 201 and the second coolant input/output unit 202 and through which the coolant circulates.

The first coolant flow path 211 is connected to the first coolant input/output unit 201 and is arranged along a predetermined direction (e.g., the Y-axis direction) between the first surface 101 and the second surface 102.

The second coolant flow path 212 is connected to the second coolant input/output unit 202 and is arranged along a predetermined direction (e.g., the Y-axis direction) between the first surface 101 and the second surface 102.

The first cooling liquid flow path 211 may overlap at least a portion of the second refrigerant flow path 312, at least a portion of the second branch refrigerant flow path 332, and at least a portion of the third refrigerant flow path 313 in a plan view. Therefore, the cooling liquid flowing through the first cooling liquid flow path 211 mainly exchanges heat with the second low-temperature refrigerant 502 and the second high-temperature refrigerant 512 flowing through the refrigerant layer 300.

The second cooling liquid flow path 212 may overlap at least a portion of the first refrigerant flow path 311, at least a portion of the first branch refrigerant flow path 331, and at least a portion of the third refrigerant flow path 313 in a plan view. Therefore, the cooling liquid flowing through the second cooling liquid flow path 212 mainly exchanges heat with the first low-temperature refrigerant 501 and the first high-temperature refrigerant 511 flowing through the refrigerant layer 300.

The first connecting coolant flow path 221 connects, at the second end 72, a portion of the first coolant flow path 211 that is closer to the second coolant flow path 312 than the third coolant flow path 313, and a portion of the second coolant flow path 212 that is closer to the third coolant flow path 313 than the second coolant flow path 312. The first connecting coolant flow path may be formed, for example, by a hose.

The second connecting coolant flow path 222 connects, at the second end 72, a portion of the first coolant flow path 211 that is closer to the third coolant flow path 313 than the second coolant flow path 312, and a portion of the second coolant flow path 212 that is closer to the first coolant flow path 311 than the third coolant flow path 313. The second connecting coolant flow path may be formed, for example, by a hose.

The cooling liquid that enters the heat exchange plate 100 from the first cooling liquid input/output unit 201 can move from the first cooling liquid flow path 211 through the first connected cooling liquid flow path 221 and the second cooling liquid flow path 212 to the second cooling liquid input/output unit 202, and the cooling liquid that enters the heat exchange plate 100 from the first cooling liquid input/output unit 201 can move from the first cooling liquid flow path 211 through the second connected cooling liquid flow path 222 and the second cooling liquid flow path 212 to the second cooling liquid input/output unit 202.

As a result, the cooling liquid that has mainly exchanged heat with the second high-temperature refrigerant 512 flowing through the first cooling liquid flow path 211 passes through the first connected cooling liquid flow path 221 and mainly exchanges heat with the first low-temperature refrigerant 501 in the second cooling liquid flow path 212. In addition, the cooling liquid that has mainly exchanged heat with the second low-temperature refrigerant 502 flowing through the first cooling liquid flow path 211 passes through the second connected cooling liquid flow path 222 and mainly exchanges heat with the first high-temperature refrigerant 511 in the second cooling liquid flow path 212. Therefore, the cooling liquid flowing through the first cooling liquid flow path 211 and the second cooling liquid flow path 212 exchanges heat with the first low-temperature refrigerant 501, the first high-temperature refrigerant 511, the second low-temperature refrigerant 502, and the second high-temperature refrigerant 512 as a whole, so that the cooling liquid layer 200 can realize a cooling liquid with small temperature unevenness overall. Therefore, the cooling liquid layer 200 can cool the secondary battery 30 more uniformly.

The first coolant flow path 211 may include a first branch path 231 and a second branch path 232 between the first surface 101 and the second surface 102.

The first branch flow path 231 is disposed closer to the second refrigerant flow path 312 than the third refrigerant flow path 313, and is connected to the first connected cooling liquid flow path 221. In a plan view, the first branch flow path 231 may overlap at least a portion of the second refrigerant flow path 312 and at least a portion of the second branch refrigerant flow path 332 that is closer to the second refrigerant flow path 312. Therefore, the cooling liquid flowing through the first branch flow path 231 mainly exchanges heat with the second high-temperature refrigerant 512 in the refrigerant layer 300.

The second branch flow path 232 is disposed closer to the third refrigerant flow path 313 than the second refrigerant flow path 312, and is connected to the second connected cooling liquid flow path 222. In a plan view, the second branch flow path 232 may overlap at least a portion of the third refrigerant flow path 313 and at least a portion of the second branch refrigerant flow path 332 that is closer to the third refrigerant flow path 313. Therefore, the cooling liquid flowing through the second branch flow path 232 mainly exchanges heat with the second low-temperature refrigerant 502 in the refrigerant layer 300.

The second coolant flow path 212 may include a third branch path 233 and a fourth branch path 234 between the first surface 101 and the second surface 102.

The third branch flow path 233 is disposed closer to the third refrigerant flow path 313 than the first refrigerant flow path 311, and is connected to the first connecting cooling flow path. In a plan view, the third branch flow path 233 may overlap at least a portion of the third refrigerant flow path 313 and at least a portion of the first branch refrigerant flow path 331 that is closer to the third refrigerant flow path 313. Therefore, the cooling liquid flowing through the third branch flow path 233 mainly exchanges heat with the first low-temperature refrigerant 501 in the refrigerant layer 300.

The fourth branch flow path 234 is disposed closer to the first refrigerant flow path 311 than the third refrigerant flow path 313, and is connected to the second connecting cooling flow path. In a plan view, the fourth branch flow path 234 may overlap at least a portion of the first refrigerant flow path 311 and at least a portion of the first branch refrigerant flow path 331 that is closer to the third refrigerant flow path 313. Therefore, the cooling liquid flowing through the fourth branch flow path 234 mainly exchanges heat with the first high-temperature refrigerant 511 in the refrigerant layer 300.

According to this configuration, the cooling liquid that enters the cooling liquid layer 200 of the heat exchange plate 100 from the first cooling liquid input/output section 201 can move from the first branch channel 231 through the first connected cooling liquid flow path 221 and the third branch channel 233 to the second cooling liquid input/output section 202, and the cooling liquid that enters the cooling liquid layer 200 of the heat exchange plate 100 from the first cooling liquid input/output section 201 can move from the second branch channel 232 through the second connected cooling liquid flow path 222 and the fourth branch channel 234 to the second cooling liquid input/output section 202.

As a result, the cooling liquid that mainly exchanges heat with the second high-temperature refrigerant 512 flowing through the first branch path 231 passes through the first connected cooling liquid flow path 221 and mainly exchanges heat with the first low-temperature refrigerant 501 in the third branch path 233. In addition, the cooling liquid that mainly exchanges heat with the second low-temperature refrigerant 502 flowing through the second branch path 232 passes through the second connected cooling liquid flow path 222 and mainly exchanges heat with the first high-temperature refrigerant 511 in the fourth branch path 234. Therefore, the cooling liquid flowing through the first branch path 231, the second branch path 232, the third branch path 233, and the fourth branch path 234 exchanges heat with the second high-temperature refrigerant 512, the second low-temperature refrigerant 502, the first low-temperature refrigerant 501, and the first high-temperature refrigerant 511 as a whole, so that the cooling liquid layer 200 can realize a cooling liquid with small temperature unevenness overall. Therefore, the cooling liquid layer 200 can cool the secondary battery 30 more uniformly.

Between the first surface 101 and the second surface 102, at least the first cooling liquid flow path 211 and the second cooling liquid flow path 212 may be arranged closer to the first surface 101 than the first refrigerant flow path 311, the second refrigerant flow path 312, and the third refrigerant flow path 313. With this configuration, the refrigerant moving through the refrigerant layer 300 can exchange heat with the cooling liquid moving through the cooling liquid layer 200, and the cooling liquid moving through the cooling liquid layer 200 can exchange heat with the secondary battery 30 via the first surface 101.

Alternatively, between the first surface 101 and the second surface 102, at least the first refrigerant flow path 311, the second refrigerant flow path 312, and the third refrigerant flow path 313 may be arranged closer to the first surface 101 than the first cooling liquid flow path 211 and the second cooling liquid flow path 212. With this configuration, the cooling liquid moving through the cooling liquid layer 200 can exchange heat with the refrigerant moving through the refrigerant layer 300, and the refrigerant moving through the refrigerant layer 300 can exchange heat with the secondary battery 30 via the first surface 101.

The heat exchange plate 100 may be composed of a first heat exchange plate 100A and a second heat exchange plate 100B, the first cooling liquid flow path 211 may be composed in the first heat exchange plate 100A, and the second cooling liquid flow path 212 may be composed in the second heat exchange plate 100B. The first heat exchange plate 100A and the second heat exchange plate 100B may be connected by a first connecting cooling liquid flow path 221 and a second connecting cooling liquid flow path 222. With this configuration, a relatively large heat exchange plate 100 can be realized using the first heat exchange plate 100A and the second heat exchange plate 100B. In addition, it is more advantageous in terms of manufacturing space and handling to manufacture a large heat exchange plate 100 by combining the first heat exchange plate 100A and the second heat exchange plate 100B than to manufacture one large heat exchange plate 100.

<Modification>
Fig. 9 is a perspective view showing an example of a configuration in which the first connecting coolant flow channel 221 and the second connecting coolant flow channel 222 cross each other at different levels according to the first embodiment. Fig. 10 is a plan view showing an example of a configuration in which the first connecting coolant flow channel 221 and the second connecting coolant flow channel 222 cross each other at different levels according to the first embodiment.

As shown in Figs. 9 and 10, the first connecting coolant flow path 221 and the second connecting coolant flow path 222 may be configured to cross each other at different levels. For example, as shown in Figs. 9 and 10, the second connecting coolant flow path 222 may be configured to pass below the first connecting coolant flow path 221. In this case, the first connecting coolant flow path 221 and the second connecting coolant flow path 222 may be realized by providing a flow path using a partition wall in the coolant layer 200, as shown in Figs. 9 and 10, instead of using hoses.

With this configuration, it is possible to achieve the same effect as the heat exchange plate 100 described above with reference to Figures 6, 7, and 8.

<Additional Notes to First Embodiment>
The above description of the first embodiment discloses the following techniques.

<Technology 1>
The car body and
A first wheel and a second wheel coupled to the vehicle body;
A secondary battery disposed along a predetermined surface of the vehicle body;
a heat exchange plate disposed along the predetermined surface in the vehicle body;
an electric motor that drives at least the first wheel by using electric power supplied from the secondary battery;
A vehicle capable of moving in a predetermined direction by the first wheel and the second wheel,
The heat exchange plate is
a first surface disposed along the predetermined surface and capable of exchanging heat with the secondary battery;
a second surface disposed along the predetermined surface and opposite the first surface;
A first end portion in the predetermined direction;
a second end opposite the first end in the predetermined direction;
a refrigerant input portion disposed at the first end through which a refrigerant enters the heat exchange plate;
a refrigerant output portion disposed at the first end portion through which the refrigerant exits the heat exchange plate;
a first refrigerant flow path connected to the refrigerant output portion and disposed along the predetermined direction between the first surface and the second surface;
a second refrigerant flow path connected to the refrigerant output portion and disposed along the predetermined direction between the first surface and the second surface;
a third refrigerant flow path connected to the refrigerant input portion and disposed along the predetermined direction between the first surface and the second surface and between the first refrigerant flow path and the second refrigerant flow path;
a first connection refrigerant flow path connecting the third refrigerant flow path and the first refrigerant flow path between the first surface and the second surface;
a second connection refrigerant flow path connecting the third refrigerant flow path and the second refrigerant flow path between the first surface and the second surface, wherein the refrigerant entering the heat exchange plate from the refrigerant input portion can move from the third refrigerant flow path through the first connection refrigerant flow path and the first refrigerant flow path to the refrigerant output portion, and the refrigerant entering the heat exchange plate from the refrigerant input portion can move from the third refrigerant flow path through the second connection refrigerant flow path and the second refrigerant flow path to the refrigerant output portion,
The heat exchange plate further includes a first coolant input/output portion disposed at the first end portion through which a coolant flows into and out of the heat exchange plate.
a second coolant input/output portion disposed at the first end portion through which the coolant flows into and out of the heat exchange plate;
a first coolant flow path connected to the first coolant input/output portion and disposed along the predetermined direction between the first surface and the second surface;
a second coolant flow path connected to the second coolant input/output portion and disposed along the predetermined direction between the first surface and the second surface;
a first connecting coolant flow path that connects a portion of the first coolant flow path that is closer to the second coolant flow path than the third coolant flow path and a portion of the second coolant flow path that is closer to the third coolant flow path than the second coolant flow path, at the second end;
a second connecting coolant flow path that connects a portion of the first coolant flow path that is closer to the third coolant flow path than the second coolant flow path and a portion of the second coolant flow path that is closer to the first coolant flow path than the third coolant flow path, at the second end,
the cooling liquid that has entered the heat exchange plate from the first cooling liquid input/output portion can move from the first cooling liquid flow path to the second cooling liquid input/output portion via the first connecting cooling liquid flow path and the second cooling liquid flow path, and the cooling liquid that has entered the heat exchange plate from the first cooling liquid input/output portion can move from the first cooling liquid flow path to the second connecting cooling liquid flow path and the second cooling liquid flow path to the second cooling liquid input/output portion.
vehicle.

<Technology 2>
A vehicle according to technology 1,
the first cooling liquid flow passage is disposed between the first surface and the second surface, closer to the second cooling liquid flow passage than the third cooling liquid flow passage, and a first branch flow passage connected to the first connecting cooling liquid flow passage;
a second branch flow path that is disposed closer to the third refrigerant flow path than the second refrigerant flow path and is connected to the second connecting coolant flow path,
the second cooling liquid flow path is disposed between the first surface and the second surface closer to the third cooling liquid flow path than the first cooling liquid flow path, and a third branch flow path connected to the first connecting cooling liquid flow path;
a fourth branch flow path disposed closer to the first refrigerant flow path than the third refrigerant flow path and connected to the second connecting coolant flow path.

<Technology 3>
A vehicle according to technology 1 or 2,
The heat exchange plate is
at least one first branch refrigerant flow path connecting the third refrigerant flow path and the first refrigerant flow path;
at least one second branch refrigerant flow path connecting the third refrigerant flow path and the second refrigerant flow path;
Further equipped with
vehicle.

<Technique 4>
A vehicle according to any one of techniques 1 to 3,
Between the first surface and the second surface,
At least the first cooling liquid flow path and the second cooling liquid flow path are
The first refrigerant flow path, the second refrigerant flow path, and the third refrigerant flow path,
Arranged on the first surface side,
vehicle.

<Technology 5>
A vehicle according to any one of techniques 1 to 4,
Between the first surface and the second surface,
At least the first refrigerant flow path, the second refrigerant flow path, and the third refrigerant flow path are
The first cooling liquid flow path and the second cooling liquid flow path
Arranged on the first surface side,
vehicle.

<Technique 6>
A vehicle according to any one of techniques 1 to 5,
The first connecting coolant flow passage and the second connecting coolant flow passage are each formed by a hose.
vehicle.

<Technique 7>
A vehicle according to technology 6,
The heat exchange plate is composed of a first heat exchange plate and a second heat exchange plate,
the first coolant flow passage is defined within the first heat exchange plate;
The second coolant flow path is defined within the second heat exchange plate.

<Technique 8>
A vehicle according to any one of techniques 1 to 5,
The first connecting coolant flow passage and the second connecting coolant flow passage are configured to cross each other in a multilevel manner.
vehicle.

<Technique 9>
A vehicle according to any one of techniques 1 to 8,
a cooling liquid circuit connected to the first cooling liquid input/output portion and the second cooling liquid input/output portion, through which the cooling liquid circulates;
vehicle.

<Technique 10>
A vehicle according to any one of techniques 1 to 9,
a refrigerant circuit including at least a compressor and a condenser connected to the refrigerant input section and the refrigerant output section, through which the refrigerant flows;
vehicle.

<Technology 11>
The car body and
A first wheel and a second wheel coupled to the vehicle body;
A secondary battery disposed along a predetermined surface of the vehicle body;
an electric motor that drives at least the first wheel by using electric power supplied from the secondary battery;
A heat exchange plate that can be installed on a vehicle that can move in a predetermined direction by the first wheel and the second wheel,
a first surface disposed along the predetermined surface and capable of exchanging heat with the secondary battery;
a second surface disposed along the predetermined surface and opposite the first surface;
A first end portion in the predetermined direction;
a second end opposite the first end in the predetermined direction;
a refrigerant input portion disposed at the first end through which a refrigerant enters the heat exchange plate;
a refrigerant output portion disposed at the first end portion through which the refrigerant exits the heat exchange plate;
a first refrigerant flow path connected to the refrigerant output portion and disposed along the predetermined direction between the first surface and the second surface;
a second refrigerant flow path connected to the refrigerant output portion and disposed along the predetermined direction between the first surface and the second surface;
a third refrigerant flow path connected to the refrigerant input portion and disposed along the predetermined direction between the first surface and the second surface and between the first refrigerant flow path and the second refrigerant flow path;
a first connection refrigerant flow path connecting the third refrigerant flow path and the first refrigerant flow path between the first surface and the second surface;
a second connection refrigerant flow path connecting the third refrigerant flow path and the second refrigerant flow path between the first surface and the second surface, wherein the refrigerant entering the heat exchange plate from the refrigerant input portion can move from the third refrigerant flow path through the first connection refrigerant flow path and the first refrigerant flow path to the refrigerant output portion, and the refrigerant entering the heat exchange plate from the refrigerant input portion can move from the third refrigerant flow path through the second connection refrigerant flow path and the second refrigerant flow path to the refrigerant output portion,
The heat exchange plate further includes a first coolant input/output portion disposed at the first end portion through which a coolant flows into and out of the heat exchange plate.
a second coolant input/output portion disposed at the first end portion and through which the coolant inputs and outputs to the heat exchange plate;
a first coolant flow path connected to the first coolant input/output portion and disposed along the predetermined direction between the first surface and the second surface;
a second coolant flow path connected to the second coolant input/output portion and disposed along the predetermined direction between the first surface and the second surface;
a first connecting coolant flow path that connects a portion of the first coolant flow path that is closer to the second coolant flow path than the third coolant flow path and a portion of the second coolant flow path that is closer to the third coolant flow path than the second coolant flow path, at the second end;
a second connecting coolant flow path that connects a portion of the first coolant flow path that is closer to the third coolant flow path than the second coolant flow path and a portion of the second coolant flow path that is closer to the first coolant flow path than the third coolant flow path, at the second end,
the cooling liquid that has entered the heat exchange plate from the first cooling liquid input/output portion can move from the first cooling liquid flow path to the second cooling liquid input/output portion via the first connecting cooling liquid flow path and the second cooling liquid flow path, and the cooling liquid that has entered the heat exchange plate from the first cooling liquid input/output portion can move from the first cooling liquid flow path to the second connecting cooling liquid flow path and the second cooling liquid flow path to the second cooling liquid input/output portion.
Heat exchange plate.

<Technique 12>
The heat exchange plate according to the technique 11,
the first cooling liquid flow passage is disposed between the first surface and the second surface, closer to the second cooling liquid flow passage than the third cooling liquid flow passage, and a first branch flow passage connected to the first connecting cooling liquid flow passage;
a second branch flow path that is disposed closer to the third refrigerant flow path than the second refrigerant flow path and is connected to the second connecting coolant flow path,
the second cooling liquid flow path is disposed between the first surface and the second surface closer to the third cooling liquid flow path than the first cooling liquid flow path, and a third branch flow path connected to the first connecting cooling liquid flow path;
a fourth branch passage disposed closer to the first refrigerant passage than the third refrigerant passage and connected to the second connecting coolant passage.

<Technique 13>
The heat exchange plate according to any one of the preceding claims,
at least one first branch refrigerant flow path connecting the third refrigerant flow path and the first refrigerant flow path;
at least one second branch refrigerant flow path connecting the third refrigerant flow path and the second refrigerant flow path;
Further equipped with
Heat exchange plate.

<Technique 14>
A heat exchange plate according to any one of techniques 11 to 13,
Between the first surface and the second surface,
At least the first cooling liquid flow path and the second cooling liquid flow path are
The first refrigerant flow path, the second refrigerant flow path, and the third refrigerant flow path,
Arranged on the first surface side,
Heat exchange plate.

<Technique 15>
A heat exchange plate according to any one of techniques 11 to 14,
Between the first surface and the second surface,
At least the first refrigerant flow path, the second refrigerant flow path, and the third refrigerant flow path are
The first cooling liquid flow path and the second cooling liquid flow path
Arranged on the first surface side,
Heat exchange plate.

<Technique 16>
16. A heat exchange plate according to any one of claims 11 to 15,
The first connecting coolant flow passage and the second connecting coolant flow passage are each formed by a hose.
Heat exchange plate.

<Technique 17>
The heat exchange plate according to claim 16,
The heat exchange plate is composed of a first heat exchange plate and a second heat exchange plate,
the first coolant flow passage is defined within the first heat exchange plate;
The second coolant flow path is defined within the second heat exchange plate.

<Technique 18>
16. A heat exchange plate according to any one of claims 11 to 15,
The first connecting coolant flow passage and the second connecting coolant flow passage are configured to cross each other in a multilevel manner.
Heat exchange plate.

<Technique 19>
19. A heat exchange plate according to any one of claims 11 to 18,
a coolant circuit through which the coolant circulates and which is provided on the vehicle body, the coolant circuit being connectable to the first coolant input/output unit and the second coolant input/output unit;
Heat exchange plate.

<Technique 20>
20. A heat exchange plate according to any one of claims 11 to 19,
a refrigerant circuit provided in the vehicle body, the refrigerant circuit having at least a compressor and a condenser, through which the refrigerant flows, the refrigerant input portion and the refrigerant output portion being connectable to the refrigerant circuit;
Heat exchange plate.

(Embodiment 2)
FIG. 11 is a plan view showing an example of the configuration of a heat exchanger plate 100 according to the second embodiment.

The refrigerant layer 300 in embodiment 2 may have the same configuration as the refrigerant layer 300 in embodiment 1. Therefore, a description of the refrigerant layer 300 will be omitted here.

The vehicle 1 may be provided with a refrigerant circuit 600 through which the refrigerant flows, the refrigerant circuit having at least a compressor 601 and a condenser 602 connected to the refrigerant input section 301 and the refrigerant output section 302. As a result, the refrigerant coming out of the refrigerant output section 302 is cooled through the compressor 601 and the condenser 602, and the cooled refrigerant enters the refrigerant input section 301 and exchanges heat with the coolant.

The vehicle 1 also includes a coolant circuit 700 that is connected to the first coolant input/output unit 201 and the second coolant input/output unit 202 and through which the coolant circulates.

The cooling liquid layer 200 includes a first cooling liquid input/output section 201, a second cooling liquid input/output section 202, a first cooling liquid flow path 401, a second cooling liquid flow path 402, a third cooling liquid flow path 403, a fourth cooling liquid flow path 404, a first connecting cooling liquid flow path 411, and a second connecting cooling liquid flow path 412.

The first coolant input/output section 201 is located at the first end 71, and coolant enters and exits the heat exchange plate 100.

The second cooling liquid input/output section 202 is disposed at the first end 71, through which the cooling liquid enters and exits the heat exchange plate 100.

The first cooling liquid flow path 401 is connected to the first cooling liquid input/output unit 201, and is configured between the first surface 101 and the second surface 102, along a predetermined direction (e.g., the Y direction), closer to the third refrigerant flow path 313 than the second refrigerant flow path 312. In a plan view, the first cooling liquid flow path 401 may overlap at least a portion of the third refrigerant flow path 313 and at least a portion of the second branch refrigerant flow path 332 that is closer to the third refrigerant flow path 313. Therefore, the cooling liquid flowing through the first cooling liquid flow path 401 mainly exchanges heat with the second low-temperature refrigerant 502 in the refrigerant layer 300.

The second cooling liquid flow path 402 is connected to the second cooling liquid input/output unit 202, and is configured between the first surface 101 and the second surface 102, along a predetermined direction (e.g., the Y-axis direction), closer to the second refrigerant flow path 312 than the third refrigerant flow path 313. In a plan view, the second cooling liquid flow path 402 may overlap at least a portion of the second refrigerant flow path 312 and at least a portion of the second branch refrigerant flow path 332 that is closer to the second refrigerant flow path 312. Therefore, the cooling liquid flowing through the second cooling liquid flow path 402 mainly exchanges heat with the second high-temperature refrigerant 512 in the refrigerant layer 300.

The third cooling liquid flow path 403 is connected to the first cooling liquid input/output unit 201, and is configured between the first surface 101 and the second surface 102, along a predetermined direction (e.g., the Y-axis direction), closer to the third refrigerant flow path 313 than the first refrigerant flow path 311. In a plan view, the third cooling liquid flow path 403 may overlap at least a portion of the third refrigerant flow path 313 and at least a portion of the first branch refrigerant flow path 331 that is closer to the third refrigerant flow path 313. Therefore, the cooling liquid flowing through the third cooling liquid flow path 403 mainly exchanges heat with the first low-temperature refrigerant 501 in the refrigerant layer 300.

The fourth coolant flow path 404 is connected to the second coolant input/output unit 202, and is configured between the first surface 101 and the second surface 102, along a predetermined direction (e.g., the Y-axis direction), closer to the first coolant flow path 311 than the third coolant flow path 313. In a plan view, the fourth coolant flow path 404 may overlap at least a portion of the first coolant flow path 311 and at least a portion of the first branch coolant flow path 331 that is closer to the first coolant flow path 311. Therefore, the coolant flowing through the fourth coolant flow path 404 mainly exchanges heat with the first high-temperature coolant 511 in the coolant layer 300.

The first connecting coolant flow path 411 connects the first coolant flow path 401 and the second coolant flow path 402 at the second end 72.

The second connecting coolant flow path 412 connects the third coolant flow path 403 and the fourth coolant flow path 404 at the second end 72.

According to this configuration, the cooling liquid that enters the cooling liquid layer 200 of the heat exchange plate 100 from the first cooling liquid input/output unit 201 can move from the first cooling liquid flow path 401 through the first connected cooling liquid flow path 411 and the second connected cooling liquid flow path 412 to the second cooling liquid input/output unit 202, and the cooling liquid that enters the cooling liquid layer 200 of the heat exchange plate 100 from the first cooling liquid input/output unit 201 can move from the third cooling liquid flow path 403 through the second connected cooling liquid flow path 412 and the fourth cooling liquid flow path 404 to the second cooling liquid input/output unit 202.

As a result, the cooling liquid that mainly exchanges heat with the second low-temperature refrigerant 502 flowing through the first cooling liquid flow path 401 passes through the first connected cooling liquid flow path 411 and mainly exchanges heat with the second high-temperature refrigerant 512 in the second cooling liquid flow path 402. In addition, the cooling liquid that mainly exchanges heat with the first low-temperature refrigerant 501 flowing through the third cooling liquid flow path 403 passes through the second connected cooling liquid flow path 412 and mainly exchanges heat with the first high-temperature refrigerant 511 in the fourth cooling liquid flow path 4040. Therefore, the cooling liquid flowing through the first cooling liquid flow path 401, the second cooling liquid flow path 402, the third cooling liquid flow path 403, and the fourth cooling liquid flow path 404 exchanges heat with the second low-temperature refrigerant 502, the second high-temperature refrigerant 512, the first low-temperature refrigerant 501, and the first high-temperature refrigerant 511 as a whole, so that the cooling liquid layer 200 can realize a cooling liquid with small temperature unevenness overall. Therefore, the cooling liquid layer 200 can cool the secondary battery 30 more uniformly.

Between the first surface 101 and the second surface 102, at least the first cooling liquid flow path 401, the second cooling liquid flow path 402, the third cooling liquid flow path 403, and the fourth cooling liquid flow path 404 may be arranged closer to the first surface 101 than the first refrigerant flow path 311, the second refrigerant flow path 312, and the third refrigerant flow path 313. With this configuration, the refrigerant moving through the refrigerant layer 300 can exchange heat with the cooling liquid moving through the cooling liquid layer 200, and the cooling liquid moving through the cooling liquid layer 200 can exchange heat with the secondary battery 30 via the first surface 101.

Alternatively, between the first surface 101 and the second surface 102, at least the first refrigerant flow path 311, the second refrigerant flow path 312, and the third refrigerant flow path 313 may be arranged closer to the first surface 101 than the first cooling liquid flow path 401, the second cooling liquid flow path 402, the third cooling liquid flow path 403, and the fourth cooling liquid flow path 404. With this configuration, the cooling liquid moving through the cooling liquid layer 200 can exchange heat with the refrigerant moving through the refrigerant layer 300, and the refrigerant moving through the refrigerant layer 300 can exchange heat with the secondary battery 30 via the first surface 101.

Next, we will explain how to switch the circulation direction of the cooling liquid.

Figure 12 is a diagram for explaining a case where the circulation direction of the cooling liquid is switched in the heat exchange plate 100 according to embodiment 2. The circulation direction of the cooling liquid in Figure 12 is different from that in Figure 11.

When the temperature of the coolant flowing through the coolant circuit 700 is lower than the temperature of the outside air, the coolant is warmed by the outside air while flowing through the coolant circuit 700. Therefore, in the second embodiment, when the temperature of the coolant flowing through the coolant circuit 700 is lower than the temperature of the outside air, as shown in FIG. 11, the coolant is input to the first coolant input/output unit 201 and output from the second coolant input/output unit 202. As a result, although the coolant moving through the first coolant flow path 401 and the third coolant flow path 403 is warmed by the outside air, it is sufficiently cooled by the first low-temperature refrigerant 501 and the second low-temperature refrigerant 502, so that the secondary battery 30 can be cooled. In addition, the coolant moving through the second coolant flow path 212 and the fourth coolant flow path is sufficiently cooled by the second low-temperature refrigerant 502 and the second low-temperature refrigerant 502 while moving through the first coolant flow path 211 and the third coolant flow path, respectively, so that the secondary battery 30 can be cooled. That is, the cooling liquid layer 200 can uniformly cool the secondary battery 30.

On the other hand, when the temperature of the coolant flowing through the coolant circuit 700 is higher than the temperature of the outside air, the coolant is cooled by the outside air while flowing through the coolant circuit 700. Therefore, in the second embodiment, when the temperature of the coolant flowing through the coolant circuit 700 is higher than the temperature of the outside air, as shown in FIG. 12, the coolant is input to the second coolant input/output unit 202 and output from the first coolant input/output unit 201. As a result, the coolant entering the second coolant flow path 402 and the fourth coolant flow path 404 from the second coolant input/output unit 202 is cooled by the outside air, so that the secondary battery 30 can be cooled while moving through the second coolant flow path 402 and the fourth coolant flow path 404. In addition, the coolant moving through the first coolant flow path 401 and the third coolant flow path 403 is sufficiently cooled by the second low-temperature refrigerant 502 and the first low-temperature refrigerant 501, respectively, so that the secondary battery 30 can be cooled. That is, the coolant layer 200 can uniformly cool the secondary battery 30.

The process of determining the circulation direction of the coolant in the coolant circuit 700 may be performed by a predetermined ECU (Electronic Control Unit) or the like provided in the vehicle 1. For example, the ECU acquires the measurement result of the temperature of the coolant flowing through the coolant circuit 700 and the measurement result of the temperature of the outside air. If the measurement result of the temperature of the coolant flowing through the coolant circuit 700 is lower than the measurement result of the temperature of the outside air, the ECU switches the circulation direction to one in which the coolant inputs to the first coolant input/output unit 201 and outputs from the second coolant input/output unit 202, and if the measurement result of the temperature of the coolant flowing through the coolant circuit 700 is higher than the measurement result of the temperature of the outside air, the ECU switches the circulation direction to one in which the coolant inputs to the second coolant input/output unit 202 and outputs from the first coolant input/output unit 201.

<Additional Notes for the Second Embodiment>
The above description of the second embodiment discloses the following technology.

<Technology 1>
The car body and
A first wheel and a second wheel coupled to the vehicle body;
A secondary battery disposed along a predetermined surface of the vehicle body;
a heat exchange plate disposed along the predetermined surface in the vehicle body;
an electric motor that drives at least the first wheel by using electric power supplied from the secondary battery;
A vehicle capable of moving in a predetermined direction by the first wheel and the second wheel,
The heat exchange plate is
a first surface that is disposed along the predetermined surface and is capable of exchanging heat with the secondary battery; and a second surface that is disposed along the predetermined surface and is opposite to the first surface.
A first end portion in the predetermined direction;
a second end opposite the first end in the predetermined direction;
a refrigerant input portion disposed at the first end through which a refrigerant enters the heat exchange plate;
a refrigerant output portion disposed at the first end portion through which the refrigerant exits the heat exchange plate;
a first refrigerant flow path connected to the refrigerant output portion and disposed along the predetermined direction between the first surface and the second surface;
a second refrigerant flow path connected to the refrigerant output portion and disposed along the predetermined direction between the first surface and the second surface;
a third refrigerant flow path connected to the refrigerant input portion and disposed along the predetermined direction between the first surface and the second surface and between the first refrigerant flow path and the second refrigerant flow path;
a first connection refrigerant flow path connecting the third refrigerant flow path and the first refrigerant flow path between the first surface and the second surface;
a second connection refrigerant flow path connecting the third refrigerant flow path and the second refrigerant flow path between the first surface and the second surface,
The refrigerant that enters the heat exchange plate from the refrigerant input portion can move from the third refrigerant flow path through the first connecting refrigerant flow path and the first refrigerant flow path to the refrigerant output portion, and the refrigerant that enters the heat exchange plate from the refrigerant input portion can move from the third refrigerant flow path through the second connecting refrigerant flow path and the second refrigerant flow path to the refrigerant output portion,
The heat exchange plate further comprises:
a first coolant input/output portion disposed at the first end portion through which a coolant flows into and out of the heat exchange plate;
a second coolant input/output portion disposed at the first end portion and through which the coolant inputs and outputs to the heat exchange plate;
a first coolant flow path connected to the first coolant input/output portion and configured to be closer to the third coolant flow path than the second coolant flow path along the predetermined direction between the first surface and the second surface;
a second coolant flow path connected to the second coolant input/output portion and configured to be closer to the second coolant flow path than the third coolant flow path along the predetermined direction between the first surface and the second surface;
a third coolant flow path connected to the first coolant input/output portion and configured to be closer to the third coolant flow path than the first coolant flow path along the predetermined direction between the first surface and the second surface;
a fourth coolant flow path connected to the second coolant input/output portion and configured to be closer to the first coolant flow path than the third coolant flow path along the predetermined direction between the first surface and the second surface;
a first connecting coolant flow passage connecting the first coolant flow passage and the second coolant flow passage at the second end;
a second connecting coolant flow passage connecting the third coolant flow passage and the fourth coolant flow passage at the second end,
the cooling liquid that has entered the heat exchange plate from the first cooling liquid input/output portion can move from the first cooling liquid flow path to the second cooling liquid input/output portion via the first connecting cooling liquid flow path and the second cooling liquid flow path, and the cooling liquid that has entered the heat exchange plate from the first cooling liquid input/output portion can move from the third cooling liquid flow path to the second connecting cooling liquid flow path and the fourth cooling liquid flow path to the second cooling liquid input/output portion.
vehicle.

<Technology 2>
A vehicle according to technology 1,
Between the first surface and the second surface,
At least the first coolant flow path, the second coolant flow path, the third coolant flow path, and the fourth coolant flow path are
The first refrigerant flow path, the second refrigerant flow path, and the third refrigerant flow path,
Arranged on the first surface side,
vehicle.

<Technology 3>
A vehicle according to technology 1 or 2,
Between the first surface and the second surface,
At least the first refrigerant flow path, the second refrigerant flow path, and the third refrigerant flow path are
The first cooling liquid flow path, the second cooling liquid flow path, the third cooling liquid flow path, and the fourth cooling liquid flow path,
Arranged on the first surface side,
vehicle.

<Technique 4>
A vehicle according to any one of techniques 1 to 3,
a cooling liquid circuit connected to the first cooling liquid input/output portion and the second cooling liquid input/output portion, through which the cooling liquid circulates;
vehicle.

<Technology 5>
A vehicle according to the fourth aspect of the present invention,
When a temperature of the coolant flowing through the coolant circuit is lower than an outside air temperature, the coolant inputs into the first coolant input/output unit and outputs from the second coolant input/output unit.
vehicle.

<Technique 6>
A vehicle according to technology 4 or 5,
When a temperature of the coolant flowing through the coolant circuit is higher than an outside air temperature, the coolant inputs into the second coolant input/output unit and outputs from the first coolant input/output unit.
vehicle.

<Technique 7>
A vehicle according to any one of techniques 1 to 6,
The heat exchange plate is
at least one first branch refrigerant flow path connecting the third refrigerant flow path and the first refrigerant flow path;
at least one second branch refrigerant flow path connecting the third refrigerant flow path and the second refrigerant flow path;
Further equipped with
vehicle.

<Technique 8>
A vehicle according to any one of techniques 1 to 7,
a refrigerant circuit including at least a compressor and a condenser connected to the refrigerant input section and the refrigerant output section, through which the refrigerant flows;
vehicle.

<Technique 9>
The car body and
A first wheel and a second wheel coupled to the vehicle body;
A secondary battery disposed along a predetermined surface of the vehicle body;
an electric motor that drives at least the first wheel by using electric power supplied from the secondary battery;
A heat exchange plate that can be mounted on a vehicle that can move in a predetermined direction by the first wheel and the second wheel,
The heat exchange plate is
a first surface that is disposed along the predetermined surface and is capable of exchanging heat with the secondary battery; and a second surface that is disposed along the predetermined surface and is opposite to the first surface.
A first end portion in the predetermined direction;
a second end opposite the first end in the predetermined direction;
a refrigerant input portion disposed at the first end through which a refrigerant enters the heat exchange plate;
a refrigerant output portion disposed at the first end portion through which the refrigerant exits the heat exchange plate;
a first refrigerant flow path connected to the refrigerant output portion and disposed along the predetermined direction between the first surface and the second surface;
a second refrigerant flow path connected to the refrigerant output portion and disposed along the predetermined direction between the first surface and the second surface;
a third refrigerant flow path connected to the refrigerant input portion and disposed along the predetermined direction between the first surface and the second surface and between the first refrigerant flow path and the second refrigerant flow path;
a first connection refrigerant flow path connecting the third refrigerant flow path and the first refrigerant flow path between the first surface and the second surface;
a second connection refrigerant flow path connecting the third refrigerant flow path and the second refrigerant flow path between the first surface and the second surface,
The refrigerant that enters the heat exchange plate from the refrigerant input portion can move from the third refrigerant flow path through the first connecting refrigerant flow path and the first refrigerant flow path to the refrigerant output portion, and the refrigerant that enters the heat exchange plate from the refrigerant input portion can move from the third refrigerant flow path through the second connecting refrigerant flow path and the second refrigerant flow path to the refrigerant output portion,
The heat exchange plate further comprises:
a first coolant input/output portion disposed at the first end portion through which a coolant flows into and out of the heat exchange plate;
a second coolant input/output portion disposed at the first end portion and through which the coolant inputs and outputs to the heat exchange plate;
a first coolant flow path connected to the first coolant input/output portion and configured to be closer to the third coolant flow path than the second coolant flow path along the predetermined direction between the first surface and the second surface;
a second coolant flow path connected to the second coolant input/output portion and configured to be closer to the second coolant flow path than the third coolant flow path along the predetermined direction between the first surface and the second surface;
a third coolant flow path connected to the first coolant input/output portion and configured to be closer to the third coolant flow path than the first coolant flow path along the predetermined direction between the first surface and the second surface;
a fourth coolant flow path connected to the second coolant input/output portion and configured to be closer to the first coolant flow path than the third coolant flow path along the predetermined direction between the first surface and the second surface;
a first connecting coolant flow passage connecting the first coolant flow passage and the second coolant flow passage at the second end;
a second connecting coolant flow passage connecting the third coolant flow passage and the fourth coolant flow passage at the second end,
the cooling liquid that has entered the heat exchange plate from the first cooling liquid input/output portion can move from the first cooling liquid flow path to the second cooling liquid input/output portion via the first connecting cooling liquid flow path and the second cooling liquid flow path, and the cooling liquid that has entered the heat exchange plate from the first cooling liquid input/output portion can move from the third cooling liquid flow path to the second connecting cooling liquid flow path and the fourth cooling liquid flow path to the second cooling liquid input/output portion.
Heat exchange plate.

<Technique 10>
A heat exchange plate according to technique 9,
Between the first surface and the second surface,
At least the first coolant flow path, the second coolant flow path, the third coolant flow path, and the fourth coolant flow path are
The first refrigerant flow path, the second refrigerant flow path, and the third refrigerant flow path,
Arranged on the first surface side,
Heat exchange plate.

<Technology 11>
The heat exchange plate according to technology 9 or 10,
Between the first surface and the second surface,
At least the first refrigerant flow path, the second refrigerant flow path, and the third refrigerant flow path are
The first cooling liquid flow path, the second cooling liquid flow path, the third cooling liquid flow path, and the fourth cooling liquid flow path,
Arranged on the first surface side,
Heat exchange plate.

<Technique 12>
A heat exchange plate according to any one of techniques 9 to 11,
A coolant circuit through which the coolant circulates and which is installed in the vehicle body can be connected to the first coolant input/output unit and the second coolant input/output unit.
Heat exchange plate.

<Technique 13>
The heat exchange plate according to claim 12,
When a temperature of the coolant flowing through the coolant circuit is lower than an outside air temperature, the coolant inputs into the first coolant input/output unit and outputs from the second coolant input/output unit.
Heat exchange plate.

<Technique 14>
The heat exchange plate according to any one of the preceding claims,
When a temperature of the coolant flowing through the coolant circuit is higher than an outside air temperature, the coolant inputs into the second coolant input/output unit and outputs from the first coolant input/output unit.
Heat exchange plate.

<Technique 15>
A heat exchanger plate according to any one of claims 9 to 14,
at least one first branch refrigerant flow path connecting the third refrigerant flow path and the first refrigerant flow path;
at least one second branch refrigerant flow path connecting the third refrigerant flow path and the second refrigerant flow path;
Further equipped with
Heat exchange plate.

<Technique 16>
A heat exchange plate according to any one of techniques 9 to 15,
A refrigerant circuit including at least a compressor and a condenser, through which the refrigerant flows, and which is installed in the vehicle body and can be connected to the refrigerant input portion and the refrigerant output portion.
Heat exchange plate.

(Embodiment 3)
FIG. 13 is a plan view showing a configuration example of a heat exchanger plate 100 according to the third embodiment.

The refrigerant layer 300 in embodiment 3 may have the same configuration as the refrigerant layer 300 in embodiment 1. Therefore, a description of the refrigerant layer 300 will be omitted here.

The cooling liquid layer 200 includes a first cooling liquid input/output section 201, a second cooling liquid input/output section 202, a first cooling liquid flow path 801, a second cooling liquid flow path 802, a third connecting cooling liquid flow path 803, and a fourth connecting cooling liquid flow path 804.

The first coolant input/output section 201 is located at the first end 71, and coolant enters and exits the heat exchange plate 100.

The second cooling liquid input/output section 202 is disposed at the first end 71, through which the cooling liquid enters and exits the heat exchange plate 100.

The first coolant flow path 801 is connected to the first coolant input/output unit 201 and is arranged along a predetermined direction (e.g., the Y-axis direction) between the first surface 101 and the second surface 102.

The second coolant flow path 802 is connected to the second coolant input/output unit 202 and is arranged along a predetermined direction (e.g., the Y-axis direction) between the first surface 101 and the second surface 102.

The first cooling liquid flow path 801 may overlap at least a portion of the second refrigerant flow path 312, at least a portion of the second branch refrigerant flow path 332, and at least a portion of the third refrigerant flow path 313 in a plan view. Therefore, the cooling liquid flowing through the first cooling liquid flow path 211 mainly exchanges heat with the second low-temperature refrigerant 502 and the second high-temperature refrigerant 512 flowing through the refrigerant layer 300.

The second cooling liquid flow path 802 may overlap at least a portion of the first refrigerant flow path 311, at least a portion of the first branch refrigerant flow path 331, and at least a portion of the third refrigerant flow path 313 in a plan view. Therefore, the cooling liquid flowing through the second cooling liquid flow path 212 mainly exchanges heat with the first low-temperature refrigerant 501 and the first high-temperature refrigerant 511 flowing through the refrigerant layer 300.

The third connecting coolant flow path 803 connects, at the second end 72, a portion of the first coolant flow path 211 that is closer to the third coolant flow path 313 than the second coolant flow path 312, and a portion of the second coolant flow path 212 that is closer to the third coolant flow path 313 than the first coolant flow path 311.

The fourth connecting coolant flow path 804 connects a portion of the first coolant flow path 211 that is closer to the second coolant flow path 312 than the third coolant flow path 313 at the second end 72, and a portion of the second coolant flow path 212 that is closer to the first coolant flow path 311 than the third coolant flow path 313.

The third connecting coolant flow path 803 and the fourth connecting coolant flow path 804 may be realized by providing a partition wall 810 in the coolant layer 200, as shown in FIG. 13.

With this configuration, the coolant flows to every corner of the coolant layer 200 on the second end 72 side. Therefore, the coolant layer 200 can also properly cool the secondary battery 30 located near the corner on the second end 72 side.

Although the embodiments have been described above with reference to the attached drawings, the present disclosure is not limited to such examples. It is clear that a person skilled in the art can conceive of various modifications, corrections, substitutions, additions, deletions, and equivalents within the scope of the claims, and it is understood that these also fall within the technical scope of the present disclosure. Furthermore, the components in the above-described embodiments may be combined in any manner as long as it does not deviate from the spirit of the invention.

The technology disclosed herein can be used for heat exchange plates having coolants and refrigerants.

1 Vehicle 2 Vehicle body 3 Wheel 3a First wheel 3b Second wheel 4 Electric motor 10 Battery pack 20 Housing 30 Secondary battery 71 First end 72 Second end 100 Heat exchange plate 100A First heat exchange plate 100B Second heat exchange plate 101 First surface 102 Second surface 200 Cooling liquid layer 201 First cooling liquid input/output section 202 Second cooling liquid input/output section 211 First cooling liquid flow path 212 Second cooling liquid flow path 221 First connected cooling liquid flow path 222 Second connected cooling liquid flow path 231 First branched flow path 232 Second branched flow path 233 Third branched flow path 234 Fourth branched flow path 300 Cooling liquid layer 301 Cooling liquid input section 302 Cooling liquid output section 311 First cooling liquid flow path 312 Second cooling liquid flow path 313 Third cooling liquid flow path 321 First connected cooling liquid flow path 322 Second connected cooling liquid flow path 331 First branched cooling liquid flow path 332 Second branched refrigerant flow path 401 First coolant flow path 402 Second coolant flow path 403 Third coolant flow path 404 Fourth coolant flow path 411 First connected coolant flow path 412 Second connected coolant flow path 501 First low temperature refrigerant 502 Second low temperature refrigerant 511 First high temperature refrigerant 512 Second high temperature refrigerant 600 Refrigerant circuit 601 Compressor 602 Condenser 700 Coolant circuit 801 First coolant flow path 802 Second coolant flow path 803 Third connected coolant flow path 804 Fourth connected coolant flow path 810 Partition wall

Claims (20)

The car body and
A first wheel and a second wheel coupled to the vehicle body;
A secondary battery disposed along a predetermined surface of the vehicle body;
a heat exchange plate disposed along the predetermined surface in the vehicle body;
an electric motor that drives at least the first wheel by using electric power supplied from the secondary battery;
A vehicle capable of moving in a predetermined direction by the first wheel and the second wheel,
The heat exchange plate is
a first surface disposed along the predetermined surface and capable of exchanging heat with the secondary battery;
a second surface disposed along the predetermined surface and opposite the first surface;
A first end portion in the predetermined direction;
a second end opposite the first end in the predetermined direction;
a refrigerant input portion disposed at the first end through which a refrigerant enters the heat exchange plate;
a refrigerant output portion disposed at the first end portion through which the refrigerant exits the heat exchange plate;
a first refrigerant flow path connected to the refrigerant output portion and disposed along the predetermined direction between the first surface and the second surface;
a second refrigerant flow path connected to the refrigerant output portion and disposed along the predetermined direction between the first surface and the second surface;
a third refrigerant flow path connected to the refrigerant input portion and disposed along the predetermined direction between the first surface and the second surface and between the first refrigerant flow path and the second refrigerant flow path;
a first connection refrigerant flow path connecting the third refrigerant flow path and the first refrigerant flow path between the first surface and the second surface;
a second connection refrigerant flow path connecting the third refrigerant flow path and the second refrigerant flow path between the first surface and the second surface, wherein the refrigerant entering the heat exchange plate from the refrigerant input portion can move from the third refrigerant flow path through the first connection refrigerant flow path and the first refrigerant flow path to the refrigerant output portion, and the refrigerant entering the heat exchange plate from the refrigerant input portion can move from the third refrigerant flow path through the second connection refrigerant flow path and the second refrigerant flow path to the refrigerant output portion,
The heat exchange plate further includes a first coolant input/output portion disposed at the first end portion through which a coolant flows into and out of the heat exchange plate.
a second coolant input/output portion disposed at the first end portion and through which the coolant inputs and outputs to the heat exchange plate;
a first coolant flow path connected to the first coolant input/output portion and disposed along the predetermined direction between the first surface and the second surface;
a second coolant flow path connected to the second coolant input/output portion and disposed along the predetermined direction between the first surface and the second surface;
a first connecting coolant flow path that connects a portion of the first coolant flow path that is closer to the second coolant flow path than the third coolant flow path and a portion of the second coolant flow path that is closer to the third coolant flow path than the second coolant flow path, at the second end;
a second connecting coolant flow path that connects a portion of the first coolant flow path that is closer to the third coolant flow path than the second coolant flow path and a portion of the second coolant flow path that is closer to the first coolant flow path than the third coolant flow path, at the second end,
the cooling liquid that has entered the heat exchange plate from the first cooling liquid input/output portion can move from the first cooling liquid flow path to the second cooling liquid input/output portion via the first connecting cooling liquid flow path and the second cooling liquid flow path, and the cooling liquid that has entered the heat exchange plate from the first cooling liquid input/output portion can move from the first cooling liquid flow path to the second connecting cooling liquid flow path and the second cooling liquid flow path to the second cooling liquid input/output portion.
vehicle. 2. A vehicle as claimed in claim 1,
the first cooling liquid flow passage is disposed between the first surface and the second surface, closer to the second cooling liquid flow passage than the third cooling liquid flow passage, and a first branch flow passage connected to the first connecting cooling liquid flow passage;
a second branch flow path that is disposed closer to the third refrigerant flow path than the second refrigerant flow path and is connected to the second connecting coolant flow path,
the second cooling liquid flow path is disposed between the first surface and the second surface closer to the third cooling liquid flow path than the first cooling liquid flow path, and a third branch flow path connected to the first connecting cooling liquid flow path;
a fourth branch flow path disposed closer to the first refrigerant flow path than the third refrigerant flow path and connected to the second connecting coolant flow path. 2. A vehicle as claimed in claim 1,
The heat exchange plate is
at least one first branch refrigerant flow path connecting the third refrigerant flow path and the first refrigerant flow path;
at least one second branch refrigerant flow path connecting the third refrigerant flow path and the second refrigerant flow path;
Further equipped with
vehicle. 2. A vehicle as claimed in claim 1,
Between the first surface and the second surface,
At least the first cooling liquid flow path and the second cooling liquid flow path are
The first refrigerant flow path, the second refrigerant flow path, and the third refrigerant flow path,
Arranged on the first surface side,
vehicle. 2. A vehicle as claimed in claim 1,
Between the first surface and the second surface,
At least the first refrigerant flow path, the second refrigerant flow path, and the third refrigerant flow path are
The first cooling liquid flow path and the second cooling liquid flow path
Arranged on the first surface side,
vehicle. 2. A vehicle as claimed in claim 1,
The first connecting coolant flow passage and the second connecting coolant flow passage are each formed by a hose.
vehicle. 7. A vehicle as claimed in claim 6,
The heat exchange plate is composed of a first heat exchange plate and a second heat exchange plate,
the first coolant flow passage is defined within the first heat exchange plate;
The second coolant flow path is defined within the second heat exchange plate. 2. A vehicle as claimed in claim 1,
The first connecting coolant flow passage and the second connecting coolant flow passage are configured to cross each other in a multilevel manner.
vehicle. 2. A vehicle as claimed in claim 1,
a cooling liquid circuit connected to the first cooling liquid input/output portion and the second cooling liquid input/output portion, through which the cooling liquid circulates;
vehicle. 2. A vehicle as claimed in claim 1,
a refrigerant circuit including at least a compressor and a condenser connected to the refrigerant input section and the refrigerant output section, through which the refrigerant flows;
vehicle. The car body and
A first wheel and a second wheel coupled to the vehicle body;
A secondary battery disposed along a predetermined surface of the vehicle body;
an electric motor that drives at least the first wheel by using electric power supplied from the secondary battery;
A heat exchange plate that can be installed on a vehicle that can move in a predetermined direction by the first wheel and the second wheel,
a first surface disposed along the predetermined surface and capable of exchanging heat with the secondary battery;
a second surface disposed along the predetermined surface and opposite the first surface;
A first end portion in the predetermined direction;
a second end opposite the first end in the predetermined direction;
a refrigerant input portion disposed at the first end through which a refrigerant enters the heat exchange plate;
a refrigerant output portion disposed at the first end portion through which the refrigerant exits the heat exchange plate;
a first refrigerant flow path connected to the refrigerant output portion and disposed along the predetermined direction between the first surface and the second surface;
a second refrigerant flow path connected to the refrigerant output portion and disposed along the predetermined direction between the first surface and the second surface;
a third refrigerant flow path connected to the refrigerant input portion and disposed along the predetermined direction between the first surface and the second surface and between the first refrigerant flow path and the second refrigerant flow path;
a first connection refrigerant flow path connecting the third refrigerant flow path and the first refrigerant flow path between the first surface and the second surface;
a second connection refrigerant flow path connecting the third refrigerant flow path and the second refrigerant flow path between the first surface and the second surface, wherein the refrigerant entering the heat exchange plate from the refrigerant input portion can move from the third refrigerant flow path through the first connection refrigerant flow path and the first refrigerant flow path to the refrigerant output portion, and the refrigerant entering the heat exchange plate from the refrigerant input portion can move from the third refrigerant flow path through the second connection refrigerant flow path and the second refrigerant flow path to the refrigerant output portion,
The heat exchange plate further includes a first coolant input/output portion disposed at the first end portion through which a coolant flows into and out of the heat exchange plate.
a second coolant input/output portion disposed at the first end portion through which the coolant flows into and out of the heat exchange plate;
a first coolant flow path connected to the first coolant input/output portion and disposed along the predetermined direction between the first surface and the second surface;
a second coolant flow path connected to the second coolant input/output portion and disposed along the predetermined direction between the first surface and the second surface;
a first connecting coolant flow path that connects a portion of the first coolant flow path that is closer to the second coolant flow path than the third coolant flow path and a portion of the second coolant flow path that is closer to the third coolant flow path than the second coolant flow path, at the second end;
a second connecting coolant flow path that connects a portion of the first coolant flow path that is closer to the third coolant flow path than the second coolant flow path and a portion of the second coolant flow path that is closer to the first coolant flow path than the third coolant flow path, at the second end,
the cooling liquid that has entered the heat exchange plate from the first cooling liquid input/output portion can move from the first cooling liquid flow path to the second cooling liquid input/output portion via the first connecting cooling liquid flow path and the second cooling liquid flow path, and the cooling liquid that has entered the heat exchange plate from the first cooling liquid input/output portion can move from the first cooling liquid flow path to the second connecting cooling liquid flow path and the second cooling liquid flow path to the second cooling liquid input/output portion.
Heat exchange plate. A heat exchange plate according to claim 11,
the first cooling liquid flow passage is disposed between the first surface and the second surface, closer to the second cooling liquid flow passage than the third cooling liquid flow passage, and a first branch flow passage connected to the first connecting cooling liquid flow passage;
a second branch flow path that is disposed closer to the third refrigerant flow path than the second refrigerant flow path and is connected to the second connecting coolant flow path,
the second cooling liquid flow path is disposed between the first surface and the second surface closer to the third cooling liquid flow path than the first cooling liquid flow path, and a third branch flow path connected to the first connecting cooling liquid flow path;
a fourth branch passage disposed closer to the first refrigerant passage than the third refrigerant passage and connected to the second connecting coolant passage. A heat exchange plate according to claim 11,
at least one first branch refrigerant flow path connecting the third refrigerant flow path and the first refrigerant flow path;
at least one second branch refrigerant flow path connecting the third refrigerant flow path and the second refrigerant flow path;
Further equipped with
Heat exchange plate. A heat exchange plate according to claim 11,
Between the first surface and the second surface,
At least the first cooling liquid flow path and the second cooling liquid flow path are
The first refrigerant flow path, the second refrigerant flow path, and the third refrigerant flow path,
Arranged on the first surface side,
Heat exchange plate. A heat exchange plate according to claim 11,
Between the first surface and the second surface,
At least the first refrigerant flow path, the second refrigerant flow path, and the third refrigerant flow path are
The first cooling liquid flow path and the second cooling liquid flow path
Arranged on the first surface side,
Heat exchange plate. A heat exchange plate according to claim 11,
The first connecting coolant flow passage and the second connecting coolant flow passage are each formed by a hose.
Heat exchange plate. 17. A heat exchange plate according to claim 16,
The heat exchange plate is composed of a first heat exchange plate and a second heat exchange plate,
the first coolant flow passage is defined within the first heat exchange plate;
The second coolant flow path is defined within the second heat exchange plate. A heat exchange plate according to claim 11,
The first connecting coolant flow passage and the second connecting coolant flow passage are configured to cross each other in a multilevel manner.
Heat exchange plate. A heat exchange plate according to claim 11,
a coolant circuit through which the coolant circulates and which is provided on the vehicle body, the coolant circuit being connectable to the first coolant input/output unit and the second coolant input/output unit;
Heat exchange plate. A heat exchange plate according to claim 11,
a refrigerant circuit provided in the vehicle body, the refrigerant circuit having at least a compressor and a condenser, through which the refrigerant flows, the refrigerant input portion and the refrigerant output portion being connectable to the refrigerant circuit;
Heat exchange plate.

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