JP7119481B2 - Vehicle power system - Google Patents

Description

The present disclosure relates to vehicle power systems.

In an electric vehicle using a motor as a power source and a hybrid vehicle using a motor and an engine as power sources, electric power is simultaneously supplied from a plurality of power storage devices to equipment mounted in the vehicle (see, for example, Patent Document 1). ).

JP 2015-070627 A

However, if one of the plurality of power storage devices fails or if the voltage difference between the plurality of power storage devices increases, power cannot be stably supplied to the devices mounted on the vehicle. There is a problem of disappearance. Moreover, when charging a plurality of power storage devices, it is preferable to charge the plurality of power storage devices individually according to the status of each of the power storage devices.

Therefore, the present disclosure has been made in view of these points, and it is possible to stably supply electric power to devices mounted on a vehicle and to individually charge each of a plurality of power storage devices. It is an object of the present invention to provide a vehicle electric power system capable of

A vehicle power system according to a first aspect of the present disclosure includes a first power storage device that supplies power to a device mounted on a vehicle, a second power storage device that supplies power to the device, and the first power storage device. A power storage system for a vehicle, comprising: a connection unit that accepts connection of a charger that charges a device or a second power storage device; and a control device, wherein the first power storage device is a first power storage unit that stores electric power and a first internal switching unit for switching whether or not the first power storage unit is electrically connected to the device or the connection unit, wherein the second power storage device is a second power storage device that stores electric power. and a second internal switching unit that switches whether to electrically connect the second power storage unit to the device or the connection unit, wherein the control device comprises the first internal switching unit and by controlling the second intra-apparatus switching unit, either one of the first power storage unit and the second power storage unit is connected to the device or the connection unit.

The control device selects the first internal switching unit and the second internal switching unit based on a priority order for electrically connecting the first power storage unit and the second power storage unit to the device or the connection unit. Either one of the first power storage unit and the second power storage unit may be electrically connected to the device or the connection unit by controlling.

The first power storage device is a power storage device for rapid charging, the second power storage device is a power storage device for normal charging with a charging speed slower than that of rapid charging, and the connection portion is capable of charging at a first speed. A first charger or a second charger capable of charging at a second rate lower than the first rate can be connected, and the control device connects the first charger to the connection. and, by controlling the first internal switching unit and the second internal switching unit, the first charger and the first power storage unit are electrically connected, and the first charger and the controlling not to electrically connect to the second power storage unit, and controlling the first in-device switching unit and the second in-device switching unit when the second charger is connected to the connecting unit; may be controlled so as to electrically connect the second charger and the second power storage unit and not electrically connect the second charger and the first power storage unit.

The first power storage device further includes a first specifying unit that specifies a first power storage amount that is the power storage amount in the first power storage unit, and the second power storage device is the power storage amount in the second power storage unit. The control device further includes a second specifying unit that specifies a second storage amount, and the control device specifies the first storage amount specified by the first specifying unit and the second storage amount specified by the second specifying unit. Either one of the first power storage unit and the second power storage unit may be connected to the device or the connection unit based on.

Advantageous Effects of Invention According to the present disclosure, it is possible to stably supply electric power to devices mounted on a vehicle, and to individually charge each of a plurality of power storage devices.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure for demonstrating the outline|summary of the vehicle electric power system which concerns on embodiment. It is a figure which shows the structure of the 1st electrical storage apparatus which concerns on embodiment. It is a figure which shows the structure of the 2nd electrical storage apparatus which concerns on embodiment. 7 is a flow chart showing the flow of processing when power is supplied to the control device according to the embodiment; 7 is a flow chart showing the flow of processing of the control device when a charger is connected to the connecting portion according to the embodiment;

[Overview of Vehicle Power System S]
FIG. 1 is a diagram for explaining an overview of a vehicle electric power system S according to an embodiment. A vehicle power system S according to the embodiment is mounted on a vehicle and used to supply power to equipment 40 mounted on the vehicle. Although not limited, the vehicle power system S according to the embodiment is suitably used for large electric vehicles such as buses and trucks. In the following description, it is assumed that the vehicle is an electric vehicle such as a bus or truck.

The vehicle power system S according to the embodiment includes a first power storage device 20 and a second power storage device 30 that supply electric power to a device 40, and a charger that charges the first power storage device 20 and the second power storage device 30. A connection unit 50 that accepts connection and a control device 60 are provided.

The first power storage device 20 and the second power storage device 30 each include an internal switching unit that switches whether or not to electrically connect the power storage unit provided therein to the device 40 or the connection unit 50 . Control device 60 controls device internal switching units provided in each of first power storage device 20 and second power storage device 30 to switch either one of first power storage device 20 and second power storage device 30 to device 40 or connected to device 40 . 50.

By doing so, the vehicle electric power system S can individually supply power to the device 40 from each of the first power storage device 20 and the second power storage device 30 . As a result, in the vehicle power system S, either one of the first power storage device 20 and the second power storage device 30 fails, or the difference between the voltages output by the first power storage device 20 and the second power storage device 30 becomes large. power can be stably supplied to the device 40 even if the In addition, the vehicle power system S can charge the first power storage device 20 and the second power storage device 30 individually.

[Configuration of Vehicle Power System S]
Next, a detailed configuration of the vehicle power system S will be described. As shown in FIG. 1 , vehicle power system S includes junction box 10 , first power storage device 20 , second power storage device 30 , device 40 , connection unit 50 , and control device 60 .

Junction box 10 functions as a wiring portion that electrically connects first power storage device 20 , second power storage device 30 , device 40 , and connection portion 50 . In this embodiment, the junction box 10 is, for example, a 500V junction box.

Junction box 10 includes relay circuits 11 , 12 , 13 and 14 .
One end of the relay circuit 11 is connected to the positive terminal of the connecting portion 50 . The other end of the relay circuit 11 is connected to the positive terminal of the first power storage device 20 , the positive terminal of the second power storage device 30 , and one end of the relay circuit 13 . The relay circuit 11 switches whether or not to electrically connect the connecting portion 50 to the first power storage device 20 and the second power storage device 30 under the control of the control device 60 .

One end of the relay circuit 12 is connected to the negative terminal of the connecting portion 50 . The other end of the relay circuit 12 is connected to the negative terminal of the first power storage device 20 , the negative terminal of the second power storage device 30 , and one end of the relay circuit 14 . Relay circuit 12 switches between electrical connection between connection unit 50 and first power storage device 20 and second power storage device 30 under the control of control device 60 .

One end of the relay circuit 13 is connected to one end of the relay circuit 11 , the positive terminal of the first power storage device 20 , and the positive terminal of the second power storage device 30 . The other end of relay circuit 13 is connected to the positive terminal of device 40 . The relay circuit 13 switches whether or not to electrically connect the device 40 to the first power storage device 20 and the second power storage device 30 under the control of the control device 60 .

One end of the relay circuit 14 is connected to one end of the relay circuit 12 , the negative terminal of the first power storage device 20 , and the negative terminal of the second power storage device 30 . The other end of relay circuit 14 is connected to the negative terminal of device 40 . Relay circuit 14 switches whether or not to electrically connect device 40 to first power storage device 20 and second power storage device 30 under the control of control device 60 .

The first power storage device 20 stores electric power supplied from the charger connected to the connection unit 50, and supplies the stored electric power to the device 40. A rechargeable energy storage system (REESS: Rechargeable Electrical Energy Storage System). is. In this embodiment, the first power storage device 20 is a power storage device for rapid charging. FIG. 2 is a diagram showing the configuration of first power storage device 20 according to the embodiment.

As shown in FIG. 2, the first power storage device 20 includes a first power storage unit 21, a first internal switching unit 22, a positive terminal 23, a negative terminal 24, a first communication unit 25, and a first specific A unit 26 and a first control unit 27 are provided.

The first power storage unit 21 is, for example, a lithium ion battery, and stores electric power.
The first intra-apparatus switching unit 22 is, for example, a relay circuit, and switches whether or not to electrically connect the first power storage unit 21 and the junction box 10 to switch between the first power storage unit 21 and the device 40 or It switches whether or not to electrically connect with the connection portion 50 .

Plus terminal 23 is connected to the plus electrode of first power storage unit 21 via first internal switching unit 22 . Also, the positive terminal 23 is connected to the relay circuits 11 and 13 of the junction box 10 .

Negative terminal 24 is connected to the negative electrode of first power storage unit 21 via first internal switching unit 22 . Also, the minus terminal 24 is connected to the relay circuits 12 and 14 of the junction box 10 .

The first communication section 25 communicates with the control device 60 under the control of the first control section 27 .
The first identification unit 26 has, for example, a voltmeter that measures the voltage of the first power storage unit 21 . First identifying unit 26 identifies a first stored power amount, which is the amount of stored power in first power storage unit 21 , based on the voltage of first power storage unit 21 .

The first control unit 27 is a processor such as a CPU (Central Processing Unit), for example, and controls the first internal switching unit 22 and the first specifying unit 26 . The first control unit 27 causes the first specifying unit 26 to specify the first power storage amount based on the signal received from the control device 60 via the first communication unit 25 . Further, first control unit 27 controls first internal switching unit 22 based on a signal received from control device 60 via first communication unit 25 to switch first power storage unit 21 and junction box 10 to each other. Toggles whether to connect or not.

The second power storage device 30 is a rechargeable energy storage system that stores power supplied from the charger connected to the connection unit 50 and supplies the stored power to the device 40 . In the present embodiment, the second power storage device 30 is, for example, a power storage device for normal charging in which the charging speed is slower than that for quick charging. Note that the second power storage device 30 may be a reuse product. FIG. 3 is a diagram showing the configuration of the second power storage device 30 according to the embodiment.

As shown in FIG. 3 , the second power storage device 30 includes a second power storage unit 31 , a second internal switching unit 32 , a positive terminal 33 , a negative terminal 34 , a second communication unit 35 , a second specific A unit 36 and a second control unit 37 are provided.

The second power storage unit 31 is, for example, a lithium ion battery, and stores electric power.
The second intra-device switching unit 32 is, for example, a relay circuit, and switches whether or not to electrically connect the second power storage unit 31 and the device 40 or the connection unit 50 .

The plus terminal 33 is connected to the plus electrode of the second power storage unit 31 via the second internal switching unit 32 . Also, the positive terminal 33 is connected to the relay circuits 11 and 13 of the junction box 10 .

The negative terminal 34 is connected to the negative electrode of the second power storage unit 31 via the second internal switching unit 32 . Also, the negative terminal 34 is connected to the relay circuits 12 and 14 of the junction box 10 .

The second communication section 35 communicates with the control device 60 under the control of the second control section 37 .
The second specifying unit 36 specifies the second power storage amount, which is the power storage amount in the second power storage unit 31 .

The second control unit 37 controls the second internal switching unit 32 and the second specifying unit 36 . The second control unit 37 causes the second specifying unit 36 to specify the second storage amount based on the signal received from the control device 60 via the second communication unit 35 . Second control unit 37 controls second internal switching unit 32 based on a signal received from control device 60 via second communication unit 35 to switch second power storage unit 31 and junction box 10 to each other. Toggles whether to connect or not.

The device 40 includes a motor section 41 and a high voltage auxiliary device 42 .
The motor unit 41 includes, for example, a motor control unit (not shown) and a motor (not shown), and operates by electric power supplied from the first power storage device 20 or the second power storage device 30 . In addition, the motor unit 41 generates regenerative electric power by the motor, for example, when the vehicle is braked. The motor unit 41 supplies the generated regenerated electric power to the first power storage device 20 or the second power storage device 30 .

The high-voltage auxiliary device 42 is, for example, a DC-DC converter, an AC compressor, a heater, a normal charger, or the like, and operates with electric power supplied from the first power storage device 20 or the second power storage device 30 .

Connection unit 50 accepts connection of a charger that charges first power storage device 20 or second power storage device 30 . The connection unit 50 connects with a quick charger 100 as a first charger capable of charging at a first rate, or a normal charger 110 as a second charger capable of charging at a second rate lower than the first rate. is possible.

The rapid charger 100 is, for example, a charger with an output voltage of 500 V, an output current of 400 A or 125 A, and a maximum output of 200 kW.
The normal charger 110 is, for example, a charger with an output voltage of 100 V or 200 V, an output current of 13 A, and a maximum output of 3 kW.

Also, the connection unit 50 communicates with the control device 60 . For example, when quick charger 100 or normal charger 110 is connected, connection unit 50 acquires type information indicating the type of charger from the charger and transmits the type information to control device 60 . The types of chargers are, for example, quick charging and normal charging.

The control device 60 is, for example, an ECU (Electronic Control Unit). The control device 60 is provided with a plurality of ports. For example, each of the plurality of ports is connected to first power storage device 20 , second power storage device 30 , relay circuits 11 , 12 , 13 , 14 , and connection section 50 . Control device 60 communicates with first power storage device 20 , second power storage device 30 , relay circuits 11 , 12 , 13 and 14 , and connection unit 50 . In FIG. 1, the control device 60 and the junction box 10 are connected by a dashed line. showing.

Control device 60 controls relay circuits 11 , 12 , 13 , and 14 provided in junction box 10 to connect first power storage device 20 and second power storage device 30 to connection unit 50 , or connect device 10 . 40 is controlled.

In addition, the control device 60 controls the first internal switching unit 22 and the second internal switching unit 32 via the first control unit 27 of the first power storage device 20 and the second control unit 37 of the second power storage device 30. By controlling, either one of the first power storage unit 21 and the second power storage unit 31 is connected to the device 40 or the connection unit 50 .

Here, the control device 60 switches the first internal switching unit 22 and the second internal switching unit 32 based on the order of priority for connecting the first power storage unit 21 and the second power storage unit 31 to the device 40 or the connection unit 50. By controlling, either one of the first power storage unit 21 and the second power storage unit 31 is connected to the device 40 or the connection unit 50 .

For example, the control device 60 is provided with storage units such as RAM (Random Access Memory) and ROM (Read Only Memory). The storage unit stores supply time priority information indicating the priority of the power storage device when supplying power to the device 40 . The supply time priority information is, for example, information that associates the port number to which the power storage device is connected with the priority of the power storage device.

The storage unit also stores charging priority information indicating the priority of the power storage device when charging the power storage device from the charger connected to the connection unit 50 . The charging priority information is, for example, information that associates the type of charger, the port number to which the power storage device is connected, and the priority of the power storage device.

For example, if the charger type indicates quick charging, the charger type is associated with the priority "1" and the port number connected to the first power storage device 20 for quick charging. In addition, the priority "2" is associated with the port number connected to second power storage device 30 for normal charging. Further, for example, when the type of the charger indicates normal charging, the type of the charger includes the priority "1" and the port number connected to the second power storage device 30 for normal charging. , and the priority "2" is associated with the port number connected to the first power storage device 20 for quick charging. The supply priority information and the charging priority information can be appropriately set by a terminal or the like that communicates with the control device 60 .

[Control during power supply]
When quick charger 100 or normal charger 110 is not connected to connection unit 50 , control device 60 supplies power from first power storage device 20 or second power storage device 30 to device 40 .

FIG. 4 is a flowchart showing the flow of processing when power is supplied by the control device 60 according to the embodiment. First, control device 60 controls relay circuits 11, 12, 13 and 14 of junction box 10 to connect first power storage device 20 and second power storage device 30 to device 40 (S1). Specifically, control device 60 connects device 40 with first power storage device 20 and second power storage device 30 by controlling relay circuits 13 and 14, and controls relay circuits 11 and 12. Thereby, the connection unit 50 is controlled so as not to be connected to the first power storage device 20 and the second power storage device 30 .

Subsequently, control device 60 identifies a power storage device with a high priority based on the supply time priority information stored in the storage unit (S2).
Subsequently, the control device 60 controls the first intra-device switching unit 22 of the first power storage device 20 and the second intra-device switching unit 32 of the second power storage device 30 to switch between the power storage unit of the specified power storage device and the device 40 . are connected, and the power storage unit of the power storage device that has not been specified is controlled not to be connected to the device 40 . As a result, control device 60 starts supplying power from the power storage unit of the specified power storage device to device 40 (S3). Here, when regenerative power is generated by the motor unit 41 of the device 40, the regenerative power is stored in the power storage unit of the specified power storage device.

Subsequently, the control device 60 causes the specifying unit of the power storage device supplying power to the device 40 to specify the amount of stored power. Then, control device 60 determines whether or not the amount of power stored in the power storage device is equal to or less than a predetermined value (S4). If the control device 60 determines that the stored electricity amount is equal to or less than the predetermined value, the control device 60 shifts the process to S5, and if it determines that the stored electricity amount is greater than the predetermined value, it re-executes S4.

Subsequently, control device 60 identifies a power storage device with a low priority based on the supply time priority information stored in the storage unit (S5).
Subsequently, the control device 60 controls the first intra-device switching unit 22 of the first power storage device 20 and the second intra-device switching unit 32 of the second power storage device 30 to switch between the power storage unit of the specified power storage device and the device 40 . are connected, and the power storage unit of the power storage device that has not been specified is controlled not to be connected to the device 40 . As a result, control device 60 starts supplying power from the power storage unit of the specified power storage device to device 40 (S6).

Subsequently, the control device 60 causes the specifying unit of the power storage device supplying power to the device 40 to specify the amount of stored power. Then, control device 60 determines whether or not the amount of power stored in the power storage device is equal to or less than a predetermined value (S7). When the control device 60 determines that the stored electricity amount is equal to or less than the predetermined value, the control device 60 shifts the processing to S8 and stops the supply of electric power. Further, when the control device 60 determines that the charged amount is larger than the predetermined value, the control device 60 re-executes S7.

[Control during charging]
When quick charger 100 or normal charger 110 is connected to connection unit 50 , control device 60 charges first power storage device 20 or second power storage device 30 .

FIG. 5 is a flowchart showing the flow of processing of control device 60 when a charger is connected to connection unit 50 according to the embodiment.
First, when the charger is connected to the connection unit 50, the control device 60 controls the relay circuits 11, 12, 13 and 14 of the junction box 10 to 50 is connected (S11). Specifically, control device 60 controls relay circuits 11 and 12 to connect connection unit 50 to first power storage device 20 and second power storage device 30, and controls relay circuits 13 and 14. By doing so, the device 40 is controlled not to be connected to the first power storage device 20 and the second power storage device 30 .

Subsequently, the control device 60 identifies the type of the charger connected to the connection unit 50 by acquiring type information indicating the type of the connected charger from the connection unit 50 (S12).
Subsequently, the control device 60 causes the first specifying unit 26 to specify the first storage amount via the first control unit 27 of the first power storage device 20, and causes the second control unit 37 of the second power storage device 30 to through the second specifying unit 36 to specify the second storage amount (S13).

Subsequently, the control device 60 stores the charging priority information stored in the storage unit, the type of the charger connected to the connection unit 50, the first storage amount specified by the first specifying unit 26, One of the first power storage device 20 and the second power storage device 30 is connected to the device 40 and the connection unit 50 based on the second power storage amount specified by the second specifying unit 36 .

First, the control device 60 specifies the power storage device to be charged based on the specified charger type, the first and second storage amounts, and the charging priority information stored in the storage unit. (S14). Specifically, control device 60 refers to the charging priority information stored in the storage unit, and selects the power storage device corresponding to the port number with the highest priority for the identified charger type. Then, control device 60 determines whether or not the amount of power stored in the selected power storage device exceeds a predetermined threshold. Control device 60 specifies the selected power storage device as the power storage device to be charged when the amount of power stored in the selected power storage device does not exceed a predetermined threshold value and the power storage device is chargeable.

Further, when the selected power storage device cannot be charged, control device 60 refers to charging priority information stored in the storage unit, and specifies a port number with a low priority for the specified charger type. selects a power storage device with a lower priority. Then, control device 60 determines whether or not the amount of power stored in the power storage device with the lower priority exceeds a predetermined threshold. Control device 60 identifies the power storage device with the low priority as the power storage device to be charged when the storage amount of the power storage device with the low priority does not exceed a predetermined threshold value and the power storage device is chargeable.

Subsequently, control device 60 determines whether or not the power storage device to be charged has been identified as a result of the processing in S14 (S15). If the control device 60 determines that the power storage device to be charged has been identified, the process proceeds to S16, and if it is determined that the power storage device to be charged has not been identified, the processing related to this flowchart ends.

Subsequently, the control device 60 controls the first internal switching unit 22 and the second internal switching unit 32 to connect the power storage device specified as the charging destination to the connection unit 50, thereby connecting the battery to the charger. Charging is started (S16).

For example, when the quick charger 100 is connected to the connection unit 50 and the first power storage device 20 is specified as the power storage device to be charged, the control device 60 switches between the first device switching unit 22 and the second device. By controlling the internal switching unit 32, the quick charger 100 and the first power storage unit 21 are electrically connected, and the quick charger 100 and the second power storage unit 31 are controlled not to be electrically connected. .

Further, when second power storage device 30 is specified as the power storage device to be charged when normal charger 110 is connected to connection unit 50 , control device 60 controls first device switching unit 22 and second device switching unit 22 . By controlling internal switching unit 32, normal charger 110 and second power storage unit 31 are electrically connected, and normal charger 110 and first power storage unit 21 are controlled not to be electrically connected. .

Subsequently, control device 60 causes the specifying unit of the power storage device to be charged to specify the amount of power stored in the power storage unit of the power storage device at predetermined time intervals. Then, control device 60 determines whether or not the power storage device to be charged is fully charged (S17). When control device 60 determines that the power storage device to be charged is fully charged, control device 60 shifts the process to S18 and causes the charger to finish charging. If the power storage device to be charged is not fully charged, control device 60 re-executes S17.

Note that when the power storage device to be charged is a power storage device with a high priority and a power storage device with a low priority can be charged, control device 60 causes the power storage device with a high priority to become fully charged. By controlling the internal switching unit of the device, a power storage device with a low priority is electrically connected to a charger, and a power storage device with a high priority is not electrically connected to a charger. can be controlled to This allows control device 60 to charge a plurality of power storage devices.

<Effects of Embodiment>
As described above, the vehicle power system S according to the embodiment controls the first internal switching unit 22 of the first power storage device 20 and the second internal switching unit 32 of the second power storage device 30. As a result, either one of the first power storage device 20 and the second power storage device 30 is connected to the connection unit 50 to which the device 40 or the charger is connected. In this manner, the vehicle power system S can stably supply power to the device 40 mounted on the vehicle, and also supply power to the first power storage device 20 and the second power storage device 30 individually. can be charged to

In addition, the vehicle power system S switches between the first internal switching unit 22 and the second internal switching unit 22 based on the order of priority for electrically connecting the first power storage unit 21 and the second power storage unit 31 to the device 40 or the connection unit 50 . Either one of the first power storage unit 21 and the second power storage unit 31 is electrically connected to the device 40 or the connection unit 50 by controlling the switching unit 32 . By doing so, the vehicle power system S can use the first power storage device 20 and the second power storage device 30 based on the order of priority.

Further, when the quick charger 100 is connected to the connection unit 50 , the vehicle electric power system S controls the first internal switching unit 22 and the second internal switching unit 32 to switch between the quick charger 100 and the second internal switching unit 32 . 1 power storage unit 21 is electrically connected, and quick charger 100 and second power storage unit 31 are controlled not to be electrically connected. Further, when the normal charger 110 is connected to the connection unit 50 , the vehicle power system S controls the first internal switching unit 22 and the second internal switching unit 32 to switch the normal charger 110 and the second 2 electrical storage unit 31 is electrically connected, and normal charger 110 and first electrical storage unit 21 are controlled not to be electrically connected. By doing so, the vehicle power system S can preferentially charge the power storage device corresponding to the type of the charger connected to the connection unit 50 .

Although the present invention has been described above using the embodiments, the technical scope of the present invention is not limited to the scope described in the above embodiments. It is obvious to those skilled in the art that various modifications or improvements can be made to the above embodiments. It is clear from the description of the scope of claims that forms with such modifications or improvements can also be included in the technical scope of the present invention.

Reference Signs List 10 Junction boxes 11, 12, 13, 14 Relay circuit 20 First power storage device 21 First power storage unit 22 First device switching unit 23 Plus terminal 24 Negative terminal 25 First communication unit 26 First identification unit 27 First control unit 30 Second power storage device 31 Second power storage unit 32 Second device switching unit 33 Plus terminal 34 Minus terminal 35 Second communication unit 36 Second identification unit 37 Second control unit 40 Device 41 Motor section 42 High-voltage auxiliary device 50 Connection section 60 Control device 100 Quick charger 110 Ordinary charger S Electric power system for vehicle

Claims (3)

A first power storage device that is a power storage device for quick charging that supplies power to equipment mounted on a vehicle, and a second power storage device that supplies power to the device and is for normal charging and has a charging speed slower than that of quick charging. and a connection unit that accepts connection of a charger that charges the first power storage device or the second power storage device , the first charger capable of charging at a first rate or a first rate lower than the first rate. A vehicle electric power system comprising a connection unit connectable to a second charger capable of charging at two speeds, and a control device,
The first power storage device is
a first power storage unit that stores electric power;
a first internal switching unit that switches whether or not to electrically connect the first power storage unit to the device or the connection unit;
has
The second power storage device is
a second power storage unit that stores electric power;
a second internal switching unit that switches whether or not to electrically connect the second power storage unit to the device or the connection unit;
has
The control device connects either one of the first power storage unit and the second power storage unit to the device or the connection unit by controlling the first internal switching unit and the second internal switching unit. When the first charger is connected to the connecting section, the first charger and the first power storage section are switched by controlling the first internal switching section and the second internal switching section. is electrically connected, and the first charger and the second power storage unit are controlled so as not to be electrically connected, and when the second charger is connected to the connection unit, the first device By controlling the internal switching unit and the second internal switching unit, the second charger and the second power storage unit are electrically connected, and the second charger and the first power storage unit are connected. control to prevent electrical connection,
Vehicle power system. The control device selects the first internal switching unit and the second internal switching unit based on a priority order for electrically connecting the first power storage unit and the second power storage unit to the device or the connection unit. electrically connecting one of the first power storage unit and the second power storage unit to the device or the connection unit by controlling;
The vehicle electric power system according to claim 1 . The first power storage device further includes a first specifying unit that specifies a first power storage amount that is the power storage amount in the first power storage unit,
The second power storage device further includes a second specifying unit that specifies a second power storage amount that is the power storage amount in the second power storage unit,
The control device determines the first power storage unit and the second power storage unit based on the first power storage amount specified by the first specifying unit and the second power storage amount specified by the second specifying unit. Either one of them is connected to the device or the connection part,
The vehicle electric power system according to claim 1 or 2 .

Images