JP6844513B2 - Temperature control system for power storage device - Google Patents

Description

The present disclosure relates to a temperature control system for a power storage device, and more particularly to a temperature control system that takes in air from an intake port and uses the air to control the temperature of the power storage device.

The temperature control system of the power storage device described in Japanese Patent Application Laid-Open No. 2014-72182 (Patent Document 1) is mounted on a vehicle, takes in air inside the vehicle from an intake port, and uses the taken-in air to measure the temperature of the power storage device. Is configured to adjust. This temperature control system includes an intake duct that guides the air taken in from the intake port to the power storage device, and a filter that is provided inside the intake duct to prevent the passage of foreign matter. Foreign matter in the air is trapped by the filter before the air is supplied to the power storage device. However, when the filter is clogged with foreign matter, it becomes difficult to supply air to the power storage device, and it becomes difficult to properly adjust the temperature of the power storage device. Therefore, in the temperature control system described in Patent Document 1, the amount of foreign matter clogging the filter is estimated in order to grasp the temperature control ability of the system.

Japanese Unexamined Patent Publication No. 2014-72182

In the temperature control system of the power storage device, the factor that reduces the temperature control ability is not limited to the filter clogging. For example, if the luggage is placed in contact with the air intake and the luggage blocks a part of the air intake, it becomes difficult to take in air from the air intake and the temperature control capacity of the system is reduced. Further, even if the intake port is not blocked, if a large load is placed near the intake port, it becomes difficult to take in air from the intake port, and the temperature control ability of the system may decrease.

The present disclosure has been made to achieve such a subject, and an object thereof is an intake port in a temperature control system in which air is taken in from an intake port and the temperature of a power storage device is adjusted by using the taken-in air. Even if there is a large object (human body, luggage, etc.) in the vicinity, the temperature of the power storage device should be adjusted appropriately.

The temperature control system of the power storage device of the present disclosure is a temperature control system of the power storage device that takes in air from an intake port and adjusts the temperature of the power storage device by using the taken-in air, and is a contact ratio detection device and an object. It includes a size detection device, a distance measuring device, a blower device, and a control device.

The contact ratio detecting device is configured to detect the ratio of the region in which an object is in contact with the region around the intake port (hereinafter, may be referred to as “contact ratio”). The object size detection device is configured to detect the size of an object in the detection range in front of the intake port. The distance measuring device is configured to measure the distance between the intake port and the object in front of the intake port. The blower is configured to blow the air taken in from the intake port to the power storage device. The control device is configured to change the amount of air to the power storage device by controlling the blower.

When the predetermined condition is satisfied, the control device is more than when the contact ratio detected by the contact ratio detection device is smaller than the first threshold value (Th1) and the predetermined condition is not satisfied. The blower is controlled to increase the amount of air to the power storage device. The predetermined conditions are that the contact ratio detected by the contact ratio detection device is smaller than the first threshold value (Th1) (hereinafter, may be referred to as "condition A") and that the contact ratio is detected by the object size detection device. The size of the object is larger than the second threshold value (Th2) (hereinafter, may be referred to as "condition B"), and the distance measured by the distance measuring device is the third threshold value (Th3). It is included as a necessary condition that it is smaller than (hereinafter, may be referred to as "condition C"). The first to third threshold values can be set arbitrarily. The first to third threshold values may be independently fixed values or may be variable according to the state of the power storage device or the like.

In the temperature control system, the temperature of the power storage device is adjusted by taking in air from the intake port and blowing the air to the power storage device by the blower. In such a temperature control system, if an object (such as luggage) is placed near the intake port, it becomes difficult to take in air from the intake port, and the temperature control ability of the system may decrease. Here, the object does not mean excluding the living body, and the human body and the like are also included in the object. If an object exists in front of the intake port, the air flow is blocked by the object and the pressure loss increases. As a result, the amount of air to the power storage device is reduced, which in turn reduces the temperature control capability of the system. The inventor of the present application has focused on the following first and second situations as a situation in which the air volume of air to the power storage device is reduced by an object existing near the intake port.

The first situation is a situation in which the rate of obstruction of the intake port by an object in contact with the intake port is large. The second situation is that the air intake port is not blocked at a large rate, but a large object exists in the vicinity of the air intake port.

In the temperature control system of the power storage device of the present disclosure, the state of the system can be determined based on the success or failure of the above conditions A to C. Specifically, if the condition A is not satisfied, it is determined that the system is in the first situation. If all of the conditions A to C are satisfied, it is determined that the system is in the second situation. If the condition A is satisfied and at least one of the condition B and the condition C is not satisfied, the system is neither the first nor the second situation (hereinafter, "third situation"). It is judged that it is (may be called). For example, if the object existing in front of the intake port is small, the condition B is not satisfied, and it is determined that the system is in the third situation. Further, when the object exists only at a position far from the intake port, the condition C is not satisfied, and it is determined that the system is in the third state. Further, when there is no object in front of the intake port, neither of the conditions B and C is satisfied, so it is determined that the system is in the third situation. Hereinafter, the time when the system is in the third situation may be referred to as "normal operation time".

The control device in the temperature control system of the power storage device of the present disclosure includes predetermined conditions (hereinafter, "air volume increase conditions") including conditions A to C (that is, the system is in the second situation) as a necessary condition. When the condition A is satisfied and at least one of the condition B and the condition C is not satisfied (that is, when the system is in the third situation), the condition A is satisfied. It is configured to increase the air volume of air to the power storage device. The control device can increase the air volume of air to the power storage device by increasing the drive amount of the blower device (for example, increasing the rotation speed of the impeller of the blower device). This makes it possible to appropriately adjust the temperature of the power storage device even when a large object (human body, luggage, etc.) is present near the intake port.

The sufficient condition for the air volume increase condition to be satisfied may be that all of the conditions A to C are satisfied, or that other conditions are satisfied in addition to the conditions A to C. For example, all of the conditions A to C are satisfied (that is, the system is in the second situation), the power storage device is in a state where temperature control is required, and the temperature is appropriately adjusted by increasing the air volume. When the condition can be adjusted, the condition for increasing the air volume may be satisfied. Examples of the state of the power storage device that requires temperature control include a state in which the temperature of the power storage device is excessively high (a state higher than the allowable upper limit value) or a state in which the temperature of the power storage device is excessively low (a state lower than the allowable lower limit value). State) is possible. Further, as a state of the power storage device whose temperature cannot be appropriately controlled due to an increase in air volume, a state in which the load of the power storage device is excessively large (a state in which the temperature is larger than the allowable upper limit value) can be considered.

Further, the control device may be configured to increase the air volume to the power storage device even when the system is in the first situation, as compared with the case where the system is in the third situation. Good. However, when the system is in the first situation, the air intake port is blocked at a large rate, and there is a possibility that the temperature of the power storage device cannot be adjusted appropriately even if the blower is controlled to increase the air volume. Therefore, it is preferable to perform a notification process for notifying the user that the intake port is blocked.

According to the configuration of the temperature control system of the power storage device of the present disclosure, in the temperature control system that takes in air from the intake port and adjusts the temperature of the power storage device by using the taken-in air, a large object (person) near the intake port. Even if there is a body, luggage, etc.), the temperature of the power storage device can be adjusted appropriately.

It is a figure which shows the basic structure of the temperature control system of the power storage device according to embodiment. It is a figure which shows the schematic structure of the vehicle to which the temperature control system of the power storage device according to an embodiment is applied. It is a figure which shows the bezel provided in the intake port in the vehicle shown in FIG. It is a figure which shows the temperature control system in the situation where an object does not exist in front of an intake port. It is a figure which shows the temperature control system in the situation where an object exists in front of an intake port. It is a flowchart explaining the processing procedure of air volume control. It is a figure which shows an example of the contact ratio-increased air volume correspondence information. It is a figure for demonstrating the principle that the size of an object is detected. It is a figure for demonstrating the principle that the distance between an intake port and an object is detected. It is a figure for demonstrating the setting method of the threshold value used for determining the magnitude of a battery load. It is a figure which shows an example of the battery type-increased air volume correspondence information. It is a figure which shows the example which provided the intake port of the temperature control system on the seat side. It is a figure which shows the position of the laser sensor in the example shown in FIG.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. The same or corresponding parts in the drawings are designated by the same reference numerals, and the description thereof will not be repeated.

FIG. 1 is a diagram showing a basic configuration of a temperature control system for a power storage device according to the present embodiment.

With reference to FIG. 1, the temperature control system 100 includes an intake duct 10a, a blower device 13, a connection duct 10b, an exhaust duct 10c, a battery pack 14, and a controller 30. Further, the temperature control system 100 includes a pressure sensor 21, a length measuring sensor 22, a laser sensor 23, a rotation sensor 24, an intake air temperature sensor 25, a current sensor 26, a battery temperature sensor 27, and a display 40. Further prepare.

The intake duct 10a has an intake port P1 for taking in air used for temperature control of the power storage device. A bezel 11 is provided at the intake port P1. The bezel 11 has a function of taking in air from the intake port P1 into the inside of the intake duct 10a and a function of suppressing foreign matter from entering the inside of the intake duct 10a. The air taken in from the intake port P1 is guided to the battery pack 14 (power storage device) by the intake duct 10a and the connection duct 10b.

Further, a filter 12 is provided inside the intake duct 10a (for example, in the vicinity of the bezel 11). The filter 12 is configured to block the passage of foreign matter. When the air that has entered the intake duct 10a through the bezel 11 passes through the filter 12 (that is, before the air is supplied to the battery pack 14), the filter 12 removes foreign matter (dust, etc.) in the air.

The filter 12 has, for example, a network structure and captures foreign matter. Since the filter 12 has a mesh structure, lint and the like that have fallen from clothes and the like are easily captured by the filter 12. By removing the bezel 11 from the intake port P1, the filter 12 can be taken out from the intake port P1. The position of the filter 12 is not limited to the position shown in FIG. 1, and can be arbitrarily changed. However, in order to prevent foreign matter from adhering to the blower device 13, it is preferable that the filter 12 is arranged closer to the intake port P1 than the blower device 13.

The intake duct 10a is connected to the blower device 13. Further, the blower device 13 is connected to the battery pack 14 via the connection duct 10b. The blower device 13 includes an impeller and applies energy to the gas by the rotational motion of the impeller to generate an air flow. Negative pressure is generated by the rotation of the impeller of the blower device 13, and the air outside the intake duct 10a is taken into the intake duct 10a via the bezel 11. Then, the air taken into the intake duct 10a passes through the connection duct 10b and is sent to the battery pack 14. In this way, the blower device 13 is configured to blow the air taken in from the intake port P1 to the battery pack 14 (power storage device). As the blower device 13, for example, a fan or a blower can be adopted. The blower 13 operates according to a drive signal from the controller 30.

The blower device 13 is configured so that the amount of air blown (air amount of air) increases as the rotation speed of the impeller increases. The blower device 13 is provided with a rotation sensor 24. The rotation sensor 24 detects the rotation speed of the impeller of the blower device 13 and outputs the detected value (signal indicating the rotation speed) to the controller 30. The controller 30 can control the rotation speed of the impeller of the blower device 13 to a target value by generating a drive signal to the blower device 13 based on the detection value of the rotation sensor 24. Then, when the rotation speed of the impeller of the blower device 13 is changed, the air volume of air to the battery pack 14 changes to a value corresponding to the rotation speed. The controller 30 can change the amount of air to the battery pack 14 by controlling the blower device 13.

The battery pack 14 includes a battery as a power storage device and a housing for accommodating the battery. The battery is, for example, a rechargeable secondary battery. As the secondary battery, for example, a lithium ion battery or a nickel hydrogen battery can be adopted. The battery pack 14 may include an assembled battery composed of a plurality of cells (secondary batteries) connected in series and / or in parallel. Further, a large-capacity capacitor or the like can also be adopted as a power storage device.

The housing of the battery pack 14 is formed with a passage for air to flow (hereinafter, referred to as an "air flow passage"). One end and the other end of the air flow passage are connected to the connection duct 10b and the exhaust duct 10c, respectively. The air sent out by the blower 13 enters the air flow passage from the connection duct 10b, and flows to the exhaust duct 10c through the air flow passage. As air flows through the airflow passage, heat exchange takes place between the air and the battery. This heat exchange may be performed directly between the air and the battery, or may be performed via a member existing between the air and the battery. By such heat exchange, the temperature of the battery can be brought close to the temperature of air. For example, the battery can be warmed by supplying the battery with air having a temperature higher than that of the battery. Further, the battery can be cooled by supplying air having a temperature lower than that of the battery to the battery. The air flow passage (path for moving air) of the battery pack 14 can be arbitrarily set. However, in order to increase the efficiency of temperature control, it is preferable that the air and the battery come into contact with each other when the air flows through the air flow passage.

The connection duct 10b is provided with an intake air temperature sensor 25. The intake air temperature sensor 25 detects the temperature of the air flowing in the connection duct 10b, and outputs the detected value (a signal indicating the temperature of the air) to the controller 30. The intake air temperature sensor 25 is arranged near the intake port of the air flow passage of the battery pack 14. The intake air temperature sensor 25 detects the temperature of the air supplied to the battery pack 14.

The battery pack 14 is provided with a current sensor 26. The current sensor 26 detects the current of the battery in the battery pack 14 and outputs the detected value (a signal indicating the current of the battery) to the controller 30.

The battery pack 14 is provided with a battery temperature sensor 27. The battery temperature sensor 27 detects the temperature of the battery in the battery pack 14 and outputs the detected value (signal indicating the battery temperature) to the controller 30. A plurality of temperature sensors may be used to detect the temperature of a plurality of parts of the battery. When a plurality of detected values (battery temperature) are input to the controller 30, the controller 30 may use a representative value (mean value, median value, maximum value, etc.) of the plurality of detected values as the battery temperature. it can.

The exhaust duct 10c has an exhaust port P2 for exhausting the air in the exhaust duct 10c. The air that has undergone heat exchange with the battery in the battery pack 14 flows in the exhaust duct 10c toward the exhaust port P2 and is discharged from the exhaust port P2.

The controller 30 includes a CPU (Central Processing Unit) as an arithmetic unit, a storage device, and input / output ports for inputting / outputting various signals (none of which are shown). The storage device includes a RAM (Random Access Memory) as a working memory and a storage (ROM (Read Only Memory), a rewritable non-volatile memory, etc.) for storage. The controller 30 functions as a control device. Various controls are executed by the CPU executing the program stored in the storage device. The various controls performed by the controller 30 are not limited to software processing, but can also be processed by dedicated hardware (electronic circuits).

The storage device of the controller 30 may further store the battery information (battery type, capacity, internal resistance, electrode thickness, grain amount, etc.) in the battery pack 14. Further, the storage device of the controller 30 may further store the corresponding information used for controlling the blower device 13. For example, information indicating the relationship between the state of the battery (battery storage device) in the battery pack 14 (battery temperature, battery load, etc.) and the driving amount of the blower device 13 (rotational speed of the impeller) (hereinafter, "battery state-" (Referred to as "air volume correspondence information") may be obtained in advance by experiments or the like and stored in the storage device of the controller 30. Further, the storage device of the controller 30 may further store the corresponding information used in the air volume increase control described later. Note that each correspondence information may be a map, a table, a mathematical formula, or a model. Further, each correspondence information may be configured by combining a plurality of maps and the like.

Signals from various sensors are input to the controller 30. Not only the signals from the rotation sensor 24, the intake temperature sensor 25, the current sensor 26, and the battery temperature sensor 27 described above, but also the signals from the pressure sensor 21, the length measuring sensor 22, and the laser sensor 23 are input to the controller 30. To. Specific examples of places where the pressure sensor 21, the length measuring sensor 22, and the laser sensor 23 are installed will be described later.

The controller 30 controls each device using the signals of each sensor. For example, the controller 30 outputs a drive signal of the blower device 13 to control the blower device 13. Further, the controller 30 outputs information to be notified to the user to the display 40 as a notification device.

The display 40 is arranged at a position visible to the user, for example, and is configured to display information (warning information to the user, etc.) input from the controller 30. Further, the display 40 may have a speaker function.

The temperature control system 100 of the power storage device shown in FIG. 1 is mounted on a vehicle together with, for example, a battery pack 14. FIG. 2 is a diagram showing a schematic configuration of a vehicle 200 to which the temperature control system 100 according to this embodiment is applied.

With reference to FIG. 2, the vehicle 200 includes a front seat 41, a rear seat 42, a package tray 43, and a temperature control system 100. Although FIG. 2 shows only a part of the temperature control system 100, the vehicle 200 includes all of the temperature control system 100 shown in FIG.

The front seat 41 includes a seat cushion 41a and a seat back 41b. The rear seat 42 includes a seat cushion 42a and a seat back 42b. The temperature of the air in the passenger compartment, which corresponds to the riding space, is adjusted to about 15 ° C. to 30 ° C. by an air conditioning system (not shown).

The package tray 43 is configured to shield the luggage in the luggage compartment from the outside by closing the gap between the seat back 42b of the rear seat 42 and the back door (not shown). Further, the package tray 43 is configured to be rotatable around the front end portion of the vehicle. By lifting the rear end side of the package tray 43 of the vehicle, luggage can be easily taken in and out of the luggage compartment (space below the package tray 43) from the rear of the vehicle.

The intake port P1 of the temperature control system 100, the battery pack 14, and the like are arranged under the rear seat 42 (vertically) in the vehicle interior. The intake port P1 opens in the foot space between the front seat 41 and the rear seat 42.

FIG. 3 is a diagram showing a bezel 11 provided at the intake port P1. With reference to FIG. 3, the bezel 11 includes an outer frame portion 11a and an intake portion 11b. The outer frame portion 11a is formed so as to surround the intake portion 11b. The intake portion 11b includes a grid member and a plurality of openings formed between the grid members. By generating a negative pressure in the blower 13, external air is taken into the inside of the intake duct 10a through the opening of the intake portion 11b. At this time, the lattice member of the intake unit 11b prevents foreign matter from entering the inside of the intake duct 10a.

As shown in FIG. 3, the outer frame portion 11a is a rectangular frame, and a plurality of pressure sensors 21 are provided along the shape of the frame in the surface region of the outer frame portion 11a. The outer frame portion 11a includes two portions extending in the longitudinal direction and two portions extending in the lateral direction. Nine pressure sensors 21 are arranged in each of the two parts in the longitudinal direction, and six pressure sensors 21 are arranged in each of the two parts in the lateral direction, so that a total of 30 pressure sensors 21 are arranged. It is provided on the outer frame portion 11a. The pressure sensor 21 detects the pressure applied to the pressure sensor 21. The detected values (signals indicating pressure) of the 30 pressure sensors 21 are all input to the controller 30. Based on these signals, the controller 30 determines how many of the 30 pressure sensors 21 provided on the outer frame portion 11a have detected a pressure equal to or higher than the reference value. The reference value used for this determination is that when an object (occupant's body, luggage, etc.) is in contact with the outer frame portion 11a, the pressure detected by the pressure sensor 21 installed at the contact portion is equal to or higher than the reference value. Is set to be. The 30 pressure sensors 21 are installed substantially evenly in the surface region of the outer frame portion 11a. Of the total number of pressure sensors 21 (30) provided in the surface region of the outer frame portion 11a, the ratio of the number of pressure sensors 21 that have detected a pressure equal to or higher than the reference value is an object in the region surrounding the intake port. Corresponds to the proportion of areas in contact (ie, the proportion of contact).

In this embodiment, the intake portion 11b of the bezel 11 is partitioned by a lattice member, and a plurality of openings are formed in the intake portion 11b. In such a bezel 11, each of the plurality of openings in the intake portion 11b functions as an intake port. Therefore, not only the surface region of the outer frame portion 11a (the peripheral region of the intake portion 11b) but also the peripheral region of each opening in the intake portion 11b corresponds to the peripheral region of the intake port. That is, the pressure sensor for detecting the contact ratio may be provided in the peripheral region (lattice member) of each opening in the intake portion 11b. The intake portion 11b of the bezel 11 may be partitioned by a plurality of parallel linear members instead of the lattice members.

Further, the outer frame portion 11a is provided with a plurality of length measuring sensors 22. As shown in FIG. 3, four length measuring sensors 22 are provided at the four corners of the outer frame portion 11a. The length measuring sensor 22 detects the distance between the intake port P1 (outer frame portion 11a) and the object existing in front of the intake port P1 (for example, the foot space between the front seat 41 and the rear seat 42). The distance detection principle will be described later. The detected values (signals indicating the distance) of the four length measuring sensors 22 provided on the outer frame portion 11a are all input to the controller 30. The controller 30 can use a representative value (mean value, median value, minimum value, etc.) of a plurality of detected values as the distance between the object and the intake port P1.

With reference to FIG. 2 again, the laser sensor 23 includes a light source and a light receiving element (not shown). The laser sensor 23 is arranged at a position facing the intake port P1 (for example, under the front seat 41). That is, the laser light emitted from the light source of the laser sensor 23 irradiates the intake port P1 at an angle substantially perpendicular to the intake port P1. By irradiating the laser beam from the laser sensor 23 toward the intake port P1, the contour of the intake port P1 (for example, the contour of the outer frame portion 11a) and an object existing between the laser sensor 23 and the intake port P1. The contour of the can be detected. The output signal of the laser sensor 23 (the contour and the signal indicating the area within the contour) is input to the controller 30. The controller 30 can detect the size of an object in the detection range in front of the intake port P1 (for example, the foot space between the front seat 41 and the rear seat 42) based on the output signal of the laser sensor 23. The size of the object is detected within the detection range of the laser sensor 23 set in front of the intake port P1. The portion outside the detection range of the laser sensor 23 is not recognized as the size of the object. The principle of detecting the size of an object will be described later.

The battery pack 14 is used, for example, as a power source for running the vehicle 200. Specifically, the electric energy output from the battery pack 14 is converted into kinetic energy for driving the vehicle 200 by a motor generator (not shown), and the driving wheels of the vehicle 200 are driven by the kinetic energy. Further, when the vehicle 200 decelerates or stops, the motor generator converts the kinetic energy generated when the vehicle 200 is braked into electric energy, and the electric energy (regenerative power) is used as the power storage device (regenerative power) in the battery pack 14. It is stored in the secondary battery). A booster circuit and / or an inverter may be arranged in the current path between the battery pack 14 and the motor generator.

The vehicle 200 may be an electric vehicle that can run using only the power of the battery pack 14, or a hybrid vehicle that can run using both the power of the battery pack 14 and the output of the engine. ..

Information on the running of the vehicle 200 (running speed, mileage, engine rotation speed, etc.) may be displayed on the display 40.

When the controller 30 drives the blower device 13, the air in the vehicle interior (particularly, the air in the foot space between the front seat 41 and the rear seat 42) is taken into the intake duct 10a from the intake port P1 and the battery. It passes through the air flow passage of the pack 14 and is discharged from the exhaust port P2. By supplying air to the battery pack 14, the temperature of the batteries in the battery pack 14 is adjusted. The air discharged from the exhaust port P2 is discharged to the outside of the vehicle 200, for example. However, the present invention is not limited to this, and the air discharged from the exhaust port P2 may be returned to the passenger compartment or may be guided to a space other than the passenger compartment (riding space) (for example, a luggage room).

In the temperature control system 100 of the power storage device according to this embodiment, during normal operation, the controller 30 blows air according to the state of the battery (power storage device) in the battery pack 14 while referring to the battery state-air volume correspondence information. 13 is controlled. Then, the controller 30 monitors the state in front of the intake port P1 based on the input signals from the pressure sensor 21, the length measuring sensor 22, and the laser sensor 23, and when a predetermined air volume increasing condition is satisfied, the controller 30 is a blower. A control for increasing the air volume with respect to 13 (hereinafter, may be referred to as “air volume increase control”) is executed. The drive amount (rotational speed of the impeller) of the blower device 13 during execution of the air volume increase control is larger than the drive amount during normal operation (drive amount determined based on the battery state-air volume correspondence information).

Hereinafter, the above-mentioned air volume increase control will be described with reference to FIGS. 4 and 5. FIG. 4 is a diagram showing a temperature control system 100 in a situation where no object exists in front of the intake port P1. FIG. 5 is a diagram showing a temperature control system 100 in a situation where an object exists in front of the intake port P1.

The temperature control system 100 is configured to take in air from the intake port P1 and use the taken in air to control the temperature of the battery (storage device) in the battery pack 14. In the situation shown in FIG. 4, since there is no object in front of the intake port P1, air can be easily taken in from the intake port P1. On the other hand, in the situation shown in FIG. 5, since the objects (baggage B1 and B2) are present in front of the intake port P1, the air flow is blocked by the objects and the pressure loss becomes large. Therefore, in the situation shown in FIG. 5, the air volume to the battery pack 14 is lower than that in the situation shown in FIG.

In the temperature control system 100 of the power storage device according to this embodiment, when the controller 30 (control device) satisfies the air volume increase condition including the following conditions A to C as necessary conditions, the condition A is satisfied and the condition A is satisfied. , The air volume of air to the battery pack 14 is increased as compared with the case where at least one of the condition B and the condition C is not satisfied.

(Condition A) The contact ratio of the intake port P1 detected using the detection value of the pressure sensor 21 is higher than the first threshold value (hereinafter, may be referred to as “first threshold value Th1” or simply “Th1”). Is also small.

(Condition B) The size of the object in the detection range in front of the intake port P1 detected by using the output signal of the laser sensor 23 is the second threshold value (hereinafter, “second threshold value Th2” or simply “Th2””. May be referred to as).

(Condition C) When the distance between the intake port P1 and the object detected using the detection value of the length measuring sensor 22 is referred to as a third threshold value (hereinafter, referred to as "third threshold value Th3" or simply "Th3"". Is smaller than).

The inventor of the present application has found that the status of the system can be determined based on the success or failure of the above conditions A to C. Specifically, when the condition A is not satisfied, it is determined that the state of the system is the first situation in which the blockage ratio of the intake port P1 by the object in contact with the intake port P1 is large. Further, when all of the conditions A to C are satisfied, it is determined that the system condition is the second condition in which the intake port P1 is not blocked at a large rate but a large object exists in the vicinity of the intake port P1. To. If the condition A is satisfied and at least one of the condition B and the condition C is not satisfied, it is determined that the system status is a third situation that is neither the first nor the second situation. Will be done.

The controller 30 in the temperature control system 100 of the power storage device according to this embodiment puts the system in the third state when the air volume increase condition including the fact that the system is in the second state is satisfied. It is configured to increase the air volume to the battery pack 14 as compared to the case where the battery pack 14 is used. The controller 30 increases the air volume of air to the battery pack 14 by increasing the rotation speed of the impeller of the blower device 13. As a result, even when a large object (human body, luggage, etc.) is present near the intake port P1, the temperature of the battery (power storage device) in the battery pack 14 can be appropriately adjusted. Further, by appropriately adjusting the temperature of the power storage device, the life of the power storage device can be extended. Hereinafter, an example of air volume control by the controller 30 will be described in detail with reference to FIGS. 6 to 11.

For example, in a situation where the temperature of the battery (power storage device) in the battery pack 14 is likely to rise, the controller 30 repeatedly executes a series of processes shown in FIG. 6 to prevent the battery temperature from becoming excessively high. .. FIG. 6 is a flowchart illustrating a procedure of processing executed by the controller 30. The process shown in this flowchart is called from the main routine and repeatedly executed every predetermined time or when a predetermined condition is satisfied.

With reference to FIG. 6, the controller 30 detects the contact ratio of the intake port P1 using the detection value of the pressure sensor 21 (step S11). The controller 30 acquires the number of pressure sensors 21 that are detecting a pressure equal to or higher than the reference value based on the detected values of the 30 pressure sensors 21 (see FIG. 3) provided in the outer frame portion 11a. The fact that the pressure sensor 21 senses a pressure equal to or higher than the reference value indicates that the object is in contact with the portion (sensor installation area) of the outer frame portion 11a in which the pressure sensor 21 is installed. Hereinafter, the pressure sensor 21 that senses a pressure equal to or higher than a reference value may be referred to as a “sensing sensor”.

The ratio of the number of sensed sensors to the number of all pressure sensors 21 (30) corresponds to the contact ratio of the intake port P1. Since the number of all pressure sensors 21 (30 in this embodiment) basically does not change unless the user intentionally changes the system configuration, the number of sensors with sensing is substantially the same. The contact ratio of the intake port P1 is shown. For example, the fact that the number of sensors with detection is 9, indicates that the contact ratio of the intake port P1 is 30% (= 100 × 9/30).

Next, in step S12, the controller 30 determines whether or not the contact ratio of the intake port P1 detected in step S11 is less than the first threshold value Th1. Th1 is a threshold value that can be set arbitrarily, and is stored in, for example, a storage device of the controller 30. Th1 suitable for protecting the power storage device may be obtained in advance by an experiment or the like and stored in the storage device of the controller 30. In this embodiment, Th1 is 30%. That is, if the number of detected sensors detected in step S11 is less than 9, it is determined that the contact ratio of the intake port P1 is less than the first threshold value Th1.

When it is determined that the contact ratio of the intake port P1 is Th1 or more (that is, the number of sensing sensors is 9 or more) (NO in step S12), the controller 30 refers to the blower device 13. After performing the air volume increase control (step S13), a notification process (step S14) for notifying the user that the intake port P1 is blocked is performed. Then, after the notification process is executed, the process is returned to the main routine.

In step S13, the controller 30 generates a drive signal for controlling the air volume increase with respect to the blower device 13, and controls the blower device 13 based on the drive signal. As a result, the drive amount of the blower device 13 (rotational speed of the impeller) becomes larger than the drive amount during normal operation (drive amount determined based on the battery state-air volume correspondence information). As the driving amount of the blower 13 increases, the amount of air (cooling air) from the blower 13 to the battery pack 14 increases. The air volume that increases due to the execution of the air volume increase control (hereinafter, may be referred to as "air volume increase") may be a fixed value or may be variable according to the contact ratio of the intake port P1 or the like. ..

For example, information indicating the relationship between the contact ratio of the intake port P1 and the increase in air volume (hereinafter referred to as "contact ratio-increased air volume correspondence information") is obtained in advance by an experiment or the like and stored in the storage device of the controller 30. You may. FIG. 7 is a diagram showing an example (table) of contact ratio-increased air volume correspondence information.

With reference to FIG. 7, this table defines a relationship in which the increase in air volume increases as the contact ratio of the intake port P1 increases. The controller 30 can change the amount of increase in air volume according to the contact ratio of the intake port P1 by referring to a table as shown in FIG. 7, for example. The controller 30 can increase the amount of air (cooling air) to the battery pack 14 as the contact ratio of the intake port P1 increases.

With reference to FIG. 6 again, in step S14, the controller 30 performs a predetermined notification process. The controller 30 displays, for example, information indicating that the intake port P1 is blocked on the display 40. Since noise (for example, fan noise) may be generated by increasing the rotation speed of the impeller of the blower device 13 in step S13, it is desirable to inform the user of the cause. The method of notifying the user is arbitrary, and the user may be notified by display (text or image, etc.), by sound (including voice), or by turning on the lamp (including blinking). May be good.

On the other hand, when it is determined in step S12 that the contact ratio of the intake port P1 is less than Th1 (YES in step S12), the controller 30 detects in front of the intake port P1 using the output signal of the laser sensor 23. The size of the object in the range is detected (step S21).

The laser sensor 23 irradiates the laser beam toward the intake port P1 and divides the region where at least one of the intake port P1 and the object exists and the other region based on the difference in the amount of light detected by the light receiving element. The image signal shown separately is output. Therefore, the controller 30 can detect the contour of the region including the intake port P1 and the object existing in front of the intake port P1 and the area within the contour based on the output signal of the laser sensor 23. Further, the controller 30 can detect the size of the object in the detection range in front of the intake port P1 based on the area thereof. Specifically, the controller 30 acquires the ratio Y / X shown below as the size of the object. FIG. 8 is a diagram for explaining the principle of detecting the size of an object.

With reference to FIG. 8, when an object does not exist in front of the intake port P1, an image signal indicating the contour S1 of the intake port P1 (that is, the boundary between the region where the intake port P1 exists and the other region) is displayed. , Is input from the laser sensor 23 to the controller 30. When an object exists in front of the intake port P1, the contour S3 of the region including the intake port P1 and the object existing in front of the intake port P1 (the region in which at least one of the intake port P1 and the object exists and the other region) An image signal indicating the boundary with the region) is input from the laser sensor 23 to the controller 30. In FIG. 8, the contour S2 shows the contour of an object existing in front of the intake port P1.

The controller 30 detects the area in the contour S1 (hereinafter referred to as “area X”) and the area in the contour S3 (hereinafter referred to as “area Y”) based on the output signal of the laser sensor 23. Then, by dividing the area Y by the area X, the ratio of the area Y to the area X (hereinafter, referred to as "ratio Y / X") is calculated. The area X indicates a value corresponding to the size of the intake port P1. Further, the area Y indicates a value substantially corresponding to the size of the object. Further, the ratio Y / X indicates a value corresponding to the size of the object with higher accuracy than the area Y. It is considered that the reason for this is that by using the area X detected by the laser sensor 23 as a reference, a decrease in accuracy due to a detection error of the laser sensor 23 is suppressed. The larger the object existing in front of the intake port P1, the larger the ratio Y / X.

In the above method, in order to easily detect the size of the object, the size of the object is obtained by using the area in the contour S3, but the area in the contour S2 is used instead of the area in the contour S3. You may use it. The controller 30 can detect the contour S2 and the area in the contour S2 by performing image processing.

With reference to FIG. 6 again, the controller 30 determines whether or not the size (ratio Y / X) of the object detected in step S21 is less than the second threshold value Th2 (step S22). Th2 is a threshold value that can be set arbitrarily, and is stored in, for example, a storage device of the controller 30. Th2 suitable for protecting the power storage device may be obtained in advance by an experiment or the like and stored in the storage device of the controller 30. In this embodiment, Th2 is 1.3. That is, if the area Y detected in step S21 is less than 1.3 times the area X, it is determined that the size of the object is less than the second threshold value Th2.

When it is determined that the size of the object (ratio Y / X) is less than Th2 (YES in step S22), the process is returned to the main routine. On the other hand, when it is determined that the size of the object (ratio Y / X) is Th2 or more (NO in step S22), the controller 30 uses the detection value of the length measuring sensor 22 to connect with the intake port P1. The distance to the object in front of the intake port P1 is detected (step S23).

FIG. 9 is a diagram for explaining the principle of detecting the distance between the intake port P1 and the object. The length measuring sensor 22 shown in FIG. 9 is a reflective MA motion sensor (triangular distance measuring sensor). However, the present invention is not limited to this, and length measurement sensors of other detection methods can also be adopted.

With reference to FIG. 9, the length measuring sensor 22 is configured to project a light beam L1 and detect a distance to an object (human body or the like) by the reflected light L2. When a plurality of objects exist in the measurement range (projection range of the light beam L1), the length measurement sensor 22 detects the distance between the object closest to the intake port P1 and the intake port P1. The measurement range of the length measurement sensor 22 is set according to, for example, the measurement range (laser irradiation range) of the laser sensor 23. By overlapping these ranges, the size and distance can be detected for a single object.

With reference to FIG. 6 again, the controller 30 determines whether or not the distance detected in step S23 is less than the third threshold value Th3 (step S24). Th3 is a threshold value that can be arbitrarily set, and is stored in, for example, a storage device of the controller 30. Th3 suitable for protecting the power storage device may be obtained in advance by an experiment or the like and stored in the storage device of the controller 30. In this embodiment, Th3 is 80 mm. That is, if the distance between the intake port P1 and the object is less than 80 mm, it is determined in step S24 that the distance is less than the third threshold value Th3.

When it is determined that the distance between the intake port P1 and the object is Th3 or more (NO in step S24), the process is returned to the main routine. On the other hand, when it is determined that the distance between the intake port P1 and the object is less than Th3 (YES in step S24), the controller 30 uses the detection value of the battery temperature sensor 27 to drive the battery in the battery pack 14. It is determined whether or not the temperature of is less than the fourth threshold value Th4 (step S25). The fourth threshold value Th4 is a threshold value that can be arbitrarily set, and is stored in, for example, a storage device of the controller 30. A fourth threshold value Th4 suitable for protecting the power storage device may be obtained in advance by an experiment or the like and stored in the storage device of the controller 30. A different fourth threshold Th4 is prepared in the storage device for each type of battery (lithium ion battery, nickel-metal hydride battery, etc.), and the controller 30 prepares a different type of battery currently in use (that is, the battery in the battery pack 14). The above determination may be made using the fourth threshold value Th4 corresponding to the above type).

When it is determined that the battery temperature is less than the fourth threshold value Th4 (YES in step S25), it is determined that the temperature of the power storage device is normal (that is, it is not necessary to cool the power storage device). , The process is returned to the main routine. On the other hand, when it is determined that the battery temperature is equal to or higher than the fourth threshold value Th4 (NO in step S25), the controller 30 uses the detected value of the current sensor 26 to display the battery in the battery pack 14. It is determined whether or not the load is less than the fifth threshold value Th5 (step S26). Details will be described later, but in this embodiment, when the battery load is less than the fifth threshold value Th5, the air volume increase control is executed, and when the battery load is the fifth threshold value Th5 or more. Does not perform air volume increase control.

The load of the battery is a load applied to the battery when the vehicle is running, and can be expressed by the ^{square of the current value of the battery (I 2).} The fifth threshold value Th5 is a threshold value that can be arbitrarily set, and is stored in, for example, a storage device of the controller 30. In order to appropriately adjust the temperature of the power storage device, the calorific value H1 (hereinafter, simply referred to as "H1") of the battery in the battery pack 14 represented by the following formula (1) and the following formula (2) are used. It is preferable to set the fifth threshold value Th5 based on the coolable calorific value H2 (hereinafter, simply referred to as “H2”) of the blower device 13.

H1 = I ² × R… (1)
H2 = kF × Q × (Tb-Tc)… (2)
In the formula (1), "I" represents the current value of the battery, and "R" represents the internal resistance of the battery. The controller 30 can detect the current value of the battery by using the detected value of the current sensor 26. The internal resistance of the battery is stored, for example, in the storage device of the controller 30. The internal resistance of the battery is stored in the storage device of the controller 30, for example, when the battery pack 14 is mounted on the temperature control system 100.

In the formula (2), "kF" represents the cooling performance coefficient of the blower device 13 for the battery in the battery pack 14. kF is a coefficient indicating how much heat of the battery can be removed when the ^{air volume is increased by 1 m 3} / h by the blower 13 and the temperature of the battery is lowered by 1 ° C. When calculating kF, the saturation value of the battery temperature is used. The kF is determined by the type and number of cells in the battery pack 14, the duct structure (easiness of air flow), and the like. The kF is obtained in advance by an experiment or the like and is stored in the storage device of the controller 30.

In the formula (2), "Q" represents the air volume of the blower device 13, "Tb" represents the temperature of the battery in the battery pack 14, and "Tc" represents the intake air temperature (the temperature of the air supplied to the battery pack 14). ). The controller 30 can detect the air volume (Q) of the blower device 13 by using the detection value of the rotation sensor 24. The controller 30 can detect the temperature (Tb) of the battery in the battery pack 14 by using the detection value of the battery temperature sensor 27. The controller 30 can detect the intake air temperature (Tc) by using the detection value of the intake air temperature sensor 25.

FIG. 10 is a diagram for explaining a method of setting the fifth threshold value Th5 used in the determination in step S26. In FIG. 10, solid lines k1 and k2 show changes in the temperature of the batteries in the battery pack 14. Specifically, the solid line k1 shows the transition of the battery temperature when the air volume control of the blower device 13 is performed under the condition that H1 is larger than H2, and the solid line k2 shows the transition of the battery temperature under the condition that H1 is H2 or less. It shows the transition of the battery temperature when the air volume is controlled.

As shown by the solid line k1 with reference to FIG. 10, when H1 is larger than H2, the temperature rise of the battery is not sufficiently suppressed, and the temperature of the battery continues to rise without converging. On the other hand, when H1 is H2 or less, as shown by the solid line k2, the temperature rise of the battery is suppressed with the passage of time, and the temperature of the battery is converged.

When the battery load (I ² ) is large, H1 (see the above formula (1)) becomes large, so that H1 may not become H2 or less even if the air volume increase control is performed in step S13 described later. Even if the air volume increase control is performed under the condition that H1 is larger than H2, the battery in the battery pack 14 cannot be sufficiently cooled (see the solid line k1 in FIG. 10). Therefore, in step S26 (FIG. 6), the controller 30 determines whether or not the battery load is excessively large (that is, whether or not the battery load is too large to be sufficiently cooled by the air volume increase control described later), and the battery load is determined. If is excessively large, the air volume increase control is not executed. The fifth threshold value Th5 used in the determination in step S26 is such that when H1 becomes larger than H2 when the air volume increase control is performed, the battery load in step S26 is equal to or higher than the fifth threshold value Th5. If it is determined that there is, and H1 becomes H2 or less when the air volume increase control is performed, it may be set so that the battery load is determined to be less than the fifth threshold value Th5 in step S26. preferable.

When it is determined that the battery load is equal to or higher than the fifth threshold value Th5 (NO in step S26), the load on the power storage device is excessively large (that is, the temperature of the power storage device is appropriately adjusted by increasing the air volume). It is judged that it cannot be done), and the process is returned to the main routine. In this case, it is preferable to perform control to reduce the load on the battery and / or perform notification processing to the user. For example, the controller 30 may notify the ECU (Electronic Control Unit) of the vehicle 200 that the load on the battery is large, and the ECU of the vehicle 200 may perform a process of limiting the current of the battery. Further, the controller 30 may notify the user that the load on the battery is large and prompt the user to run under the condition that the load on the battery is not applied.

On the other hand, when it is determined that the battery load is less than the fifth threshold value Th5 (YES in step S26), after the controller 30 performs air volume increase control (step S13) on the blower device 13. , The notification process (step S14) for notifying the user that there is a large object in the vicinity of the intake port P1 is performed. Then, after the notification process is executed, the process is returned to the main routine.

In step S13, basically, the blower device 13 is controlled in the same manner as when it is determined that the contact ratio of the intake port P1 is less than the first threshold value Th1 in step S12 described above, and the air volume increase control is performed. To execute. The air volume (increased air volume) increased by executing this air volume increase control may be a fixed value or may be variable depending on the type of battery or the like.

For example, information indicating the relationship between the battery type and the increased air volume (hereinafter, referred to as “battery type-increased air volume corresponding information”) may be obtained in advance by an experiment or the like and stored in the storage device of the controller 30. FIG. 11 is a diagram showing an example (table) of battery type-increased air volume correspondence information. In FIG. 11, "Ni" indicates a nickel-metal hydride battery, and "Li" indicates a lithium-ion battery.

With reference to FIG. 11, this table shows an increase in air volume when the battery in the battery pack 14 is a nickel metal hydride battery, which is larger than an increase in air volume when the battery in the battery pack 14 is a lithium ion battery. Specify the air volume. By referring to a table as shown in FIG. 11, for example, the controller 30 performs the above-mentioned air volume increase control according to the air volume increase corresponding to the battery type (lithium ion battery, nickel-metal hydride battery) in the battery pack 14. Can be done. The type of battery is stored in the storage device of the controller 30, for example. The type of battery is stored in the storage device of the controller 30, for example, when the battery pack 14 is mounted on the temperature control system 100.

The method for determining the increase in air volume is not limited to the above method and is arbitrary. For example, information showing the relationship between the contact ratio of the intake port P1, the size of the object in front of the intake port P1, the distance between the intake port P1 and the object in front of the intake port P1, and the increase in air volume (hereinafter, "object-"). The information corresponding to the increased air volume) may be obtained in advance by an experiment or the like and stored in the storage device of the controller 30. Then, the controller 30 refers to the object-increased air volume correspondence information, and determines the contact ratio of the intake port P1 (detected value in step S11), the size of the object in front of the intake port P1 (detected value in step S21), and The above air volume increase control may be performed by the amount of air volume increase corresponding to the distance between the intake port P1 and the object in front of the intake port P1 (detected value in step S23).

In step S14, the controller 30 performs a predetermined notification process. The controller 30 causes the display 40 to display information indicating that there is a large object in the vicinity of the intake port P1, for example.

By repeating the process of FIG. 6, when the air volume increasing conditions (steps S12, S22, S24 to S26) including the conditions A to C as necessary conditions are satisfied, the rotation speed of the impeller of the blower device 13 becomes large. As a result, the amount of air (cooling air) to the battery pack 14 increases. As a result, even when a large object (human body, luggage, etc.) is present near the intake port P1, the temperature of the battery (power storage device) in the battery pack 14 can be appropriately adjusted.

The position of the intake port of the temperature control system mounted on the vehicle is not limited to under the rear seat in the vehicle interior and is arbitrary. FIG. 12 is a diagram showing an example in which the intake port of the temperature control system is provided on the seat side.

With reference to FIG. 12, for example, the intake ports P11 and P12 may be provided on the seat side 42c of the rear seat 42. In this example, the intake ports P11 and P12 are arranged in the vicinity of the seat cushion 42a. Therefore, when luggage is placed on the seat cushion 42a or the occupant sits near the intake ports P11 and P12 of the seat cushion 42a, an object (human body, luggage, etc.) is placed in front of the intake ports P11 and P12. It may become present and it may be difficult to take in air from the intake ports P11 and P12. Even in a temperature control system having such intake ports P11 and P12, it is effective to perform the process shown in FIG. By performing the process of FIG. 6 above, the temperature of the battery in the battery pack 14 can be appropriately adjusted even when a large object (human body, luggage, etc.) exists near the intake ports P11 and P12. Becomes possible.

FIG. 13 is a diagram showing the position of the laser sensor 23 in the example shown in FIG. With reference to FIG. 13, the laser sensor 23 can be arranged at a position facing the intake ports P11 and P12 of the front seat 41 (for example, behind the seat side of the front seat 41). Although only the laser sensor 23 for the intake port P12 is shown in FIG. 13, the laser sensor 23 for the intake port P11 is also provided on the front seat 41 (for example, the back of the seat side of the front seat 41). Can be done.

In the process of FIG. 6, when the air volume increase conditions (steps S12, S22, S24 to S26) including the conditions A to C as necessary conditions are not satisfied, that is, when the contact ratio of the intake port P1 is larger than Th1 (condition A). Even if is not satisfied), the air volume increase control is performed. However, the present invention is not limited to this, and when the contact ratio of the intake port P1 is larger than Th1 (YES in step S12), the air volume increase control (step S13) is not executed and only the notification process (step S14) is performed. Good.

When it is determined in step S26 that the battery load is equal to or higher than the fifth threshold value Th5 (NO in step S26), the air volume increase control is performed and other controls (battery current limit, etc.) are performed. , The process of FIG. 6 may be changed.

In steps S12, S22, S24 to S26, when each detected value (contact ratio, object size, distance, battery temperature, battery load) matches the threshold value, it is arbitrarily determined whether to determine YES or NO. It can be changed and may be changed so as to be different from the example shown in FIG.

In the process of FIG. 6, all of the conditions A to C are satisfied (steps S12, S22, S24), the battery in the battery pack 14 is in a state where temperature control is required, and the air volume is increased. When the temperature can be adjusted appropriately (steps S25 and S26), the air volume increase condition is satisfied. However, the present invention is not limited to this, and the sufficient condition for satisfying the air volume increase condition may be only that all of the conditions A to C are satisfied. For example, the process of FIG. 6 is changed so that the air volume increase control is executed without going through steps S25 and S26 when it is determined in step S24 that the distance between the intake port P1 and the object is less than Th3. May be good.

In the process of FIG. 6 described above, the air volume increase control for cooling the battery is performed in step S13 so that the temperature of the battery does not rise excessively in a situation where the temperature of the battery in the battery pack 14 tends to rise. .. However, the present invention is not limited to this, and the temperature of the battery in the battery pack 14 is changed by changing the process of FIG. 6 so that the amount of warm air (air for heating the power storage device) to the battery pack 14 is increased in step S13. The temperature of the battery may not be excessively lowered in a situation where the temperature tends to be low.

The configuration of the system shown in FIG. 1 and the position and number of sensors shown in FIG. 3 can be changed within a range in which air volume control can be appropriately performed. For example, the blower 13 may be arranged between the battery pack 14 and the exhaust port P2. Further, the number of length measuring sensors 22 may be one.

The contact ratio of the intake port P1, the size of the object in front of the intake port P1, and the method of detecting the distance between the intake port P1 and the object are not limited to the above-mentioned methods and are arbitrary. For example, a camera (image sensor) may be used to detect the size of an object. Further, a light receiving element may be provided on the intake port P1 side to irradiate light toward the intake port P1. If an object exists in front of the intake port P1, the light receiving element cannot detect the light in the region where the light is blocked by the object (that is, the region corresponding to the size of the object). The projected area of the object detected based on such a principle may be used as the size of the object.

The object to which the temperature control system of the power storage device of the present disclosure is applied is not limited to the vehicle but is arbitrary. The application target may be, for example, other vehicles (ships, airplanes, etc.) or buildings (houses, factories, etc.).

The embodiments disclosed this time should be considered to be exemplary in all respects and not restrictive. The scope of the present invention is shown by the scope of claims rather than the description of the embodiment described above, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

10a intake duct, 10b connection duct, 10c exhaust duct, 11 bezel, 11a outer frame, 11b intake, 12 filter, 13 blower, 14 battery pack, 21 pressure sensor, 22 length measurement sensor, 23 laser sensor, 24 rotations. Sensor, 25 Intake temperature sensor, 26 Current sensor, 27 Battery temperature sensor, 30 Controller, 40 Display, 41 Front seat, 41a, 42a Seat cushion, 41b, 42b Seat back, 42 Rear seat, 42c Seat side, 43 Package tray, 100 Temperature control system, 200 vehicles, P1, P11, P12 intake port, P2 exhaust port.

Claims (2)

It is a temperature control system for a power storage device that takes in air from the intake port and uses the air taken in to adjust the temperature of the power storage device.
A contact ratio detection device that detects the ratio of the area in contact with an object in the area around the intake port, and
An object size detection device that detects the size of an object in the detection range in front of the intake port, and
A distance measuring device that measures the distance between the intake port and an object in front of the intake port,
An air blower that blows air taken in from the intake port to the power storage device, and
A control device that changes the air volume of the air to the power storage device by controlling the blower, and
With
When a predetermined condition is satisfied, the control device has a smaller ratio detected by the contact ratio detection device than the first threshold value, and the storage capacity is higher than when the predetermined condition is not satisfied. Control the blower to increase the airflow of the air to the device.
The predetermined conditions are
The ratio detected by the contact ratio detection device is smaller than the first threshold value.
The size of the object detected by the object size detection device is equal to or greater than the second threshold value.
The distance measured by the distance measuring device is smaller than the third threshold value, and
As a necessary condition for establishment, a temperature control system for a power storage device. The predetermined condition is, in addition to the necessary condition,
The temperature of the power storage device is equal to or higher than the fourth threshold value.
The load of the power storage device is less than the fifth threshold value, and
The temperature control system for a power storage device according to claim 1, which is established when the conditions are satisfied.

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