JP7290598B2 - temperature controller - Google Patents

Description

The present invention relates to a temperature adjustment device that adjusts the temperature of a secondary battery.

Currently, secondary batteries such as lithium-ion batteries and nickel-metal hydride batteries are used in vehicles that use electric power as driving force, such as electric vehicles, hybrid vehicles, and plug-in hybrid vehicles. As an example of technology for adjusting the temperature of such a secondary battery, Patent Document 1 discloses a battery module in which external flow paths are provided on both the intake side and the exhaust side, and a heat medium is circulated through these external flow paths. do.

Japanese Patent No. 5888166

However, in the battery module disclosed in Patent Literature 1, cooling air is discharged without passing through between the secondary batteries due to the external flow path, so cooling air loss occurs on both the intake side and the exhaust side. Therefore, the battery module disclosed in Patent Literature 1 has a problem that the ability to adjust the temperature of the secondary battery is low.

SUMMARY OF THE INVENTION An object of the present invention is to provide a temperature regulating device with improved ability to regulate the temperature of a secondary battery.

A temperature adjustment device according to an aspect of the present invention is a temperature adjustment device that accommodates a plurality of arranged secondary batteries and adjusts the temperatures of the plurality of secondary batteries, and blows cooling air into the temperature adjustment device. an air intake for air intake, an air intake path formed to allow cooling air entering from the air intake to flow between the plurality of secondary batteries, and cooling air entering from the air intake to flow between the plurality of secondary batteries A first exhaust path formed to discharge the cooling air to the outside of the temperature adjustment device without flowing the air, and a cooling air passing between the plurality of secondary batteries to be discharged to the outside of the temperature adjustment device. a second exhaust path and a third exhaust path. The first exhaust path is formed outside the intake path. The second exhaust path is formed outside the outermost secondary battery on the same side as the air inlet among the plurality of secondary batteries. The third exhaust path is formed outside the secondary battery located on the outermost side of the plurality of secondary batteries on the side opposite to the air inlet.

An on-off valve is installed at or near the exhaust port of the first exhaust path, and the on-off valve of the first exhaust path is controlled to close when the cooling air does not enter from the intake port. preferably.

The on-off valve of the first exhaust path is closed when the difference between the internal temperature of the first exhaust path and the external temperature of the temperature adjustment device is less than a predetermined value when the cooling air enters from the intake port, and the first It is preferable that the exhaust path is controlled to open when the difference between the internal temperature of the exhaust path and the external temperature of the temperature control device is equal to or greater than a predetermined value.

An on-off valve is installed at the exhaust port of the second exhaust route and the third exhaust route or in the vicinity of the exhaust port, respectively. It is preferably controlled to be closed when cooling air does not enter.

The cross-sectional area of the third exhaust path is preferably smaller than the cross-sectional area of the second exhaust path.

A temperature adjustment device according to another aspect of the present invention is a temperature adjustment device that accommodates a plurality of arranged secondary batteries and adjusts the temperature of the plurality of secondary batteries, wherein cooling air is supplied to the temperature adjustment device. An air intake for air intake, an air intake path formed to allow the cooling air entering from the air intake to flow between a plurality of secondary batteries, and a temperature adjustment of the cooling air passing between the plurality of secondary batteries. and two exhaust paths configured to exhaust to the exterior of the device. One of the two exhaust paths is formed outside the outermost secondary battery on the same side as the air inlet among the plurality of secondary batteries. The other of the two exhaust paths is formed outside the secondary battery located on the outermost side of the plurality of secondary batteries on the side opposite to the intake port.

A temperature adjustment device according to another aspect of the present invention is a temperature adjustment device that accommodates a plurality of arranged secondary batteries and adjusts the temperature of the plurality of secondary batteries, wherein cooling air is supplied to the temperature adjustment device. an air intake for air intake, an air intake path formed to allow the cooling air entering from the air intake to flow between the plurality of secondary batteries, and the cooling air entering from the air intake to flow between the plurality of secondary batteries. and an exhaust path formed to exhaust the temperature control device to the outside without flowing into the temperature control device. The exhaust path is formed outside the intake path. An on-off valve is installed at the exhaust port of the exhaust path or in the vicinity of the exhaust port. The on-off valve is controlled to close when cooling air does not enter from the intake port, and when cooling air enters from the intake port, the difference between the internal temperature of the exhaust path and the external temperature of the temperature control device is the default value. It is preferable that the control is performed such that it is closed when the temperature is less than the exhaust path and is opened when the difference between the internal temperature of the exhaust path and the external temperature of the temperature control device is equal to or greater than a predetermined value.

ADVANTAGE OF THE INVENTION By this invention, the temperature control apparatus with which the ability to adjust the temperature of a secondary battery improved can be provided.

It is a schematic diagram showing a temperature control device concerning one embodiment of the present invention. FIG. 2 is a vertical cross-sectional view taken along the II cross-sectional line shown in FIG. 1; FIG. 3 is a vertical cross-sectional view along the II-II cross-sectional line shown in FIG. 2; 3 is a horizontal sectional view along the III-III sectional line shown in FIG. 2; FIG. It is a figure which shows the structure of the control apparatus which controls the on-off valve with which the temperature control apparatus which concerns on one Embodiment of this invention is equipped. 4 is a flow chart showing processing executed by a control device according to an embodiment of the present invention; FIG. 3 is a diagram showing the static pressure in the intake path, the static pressure in the exhaust path, and the differential pressure therebetween; FIG. 5 is a diagram showing the temperature of a secondary battery within a conventional temperature control device and the temperature of a secondary battery within a temperature control device according to an embodiment of the present invention; FIG. 5 is a diagram showing the temperature of a secondary battery within a conventional temperature control device and the temperature of a secondary battery within a temperature control device according to an embodiment of the present invention; FIG. 5 is a diagram showing the temperature of a secondary battery within a conventional temperature control device and the temperature of a secondary battery within a temperature control device according to an embodiment of the present invention;

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic diagram showing a temperature control device 10 according to one embodiment of the invention. The temperature adjustment device 10 is a device that adjusts the temperature of a secondary battery installed in a vehicle or the like. The temperature control device 10 accommodates a plurality of secondary batteries in an arrayed state.

FIG. 2 is a vertical cross-sectional view along the II cross-sectional line shown in FIG. FIG. 3 is a vertical cross-sectional view along the II-II cross-sectional line shown in FIG. FIG. 4 is a horizontal sectional view along the III-III section line shown in FIG. The temperature adjustment device 10 includes an intake port 11 , an intake path 21 , exhaust paths 31 , 32 and 33 , and exhaust ports 41 , 42 and 43 .

The intake port 11 is an opening for taking in the cooling air generated by a blower (not shown) arranged outside the temperature adjustment device 10 into the temperature adjustment device 10 . The air intake path 21 is a path formed to allow the cooling air entering from the air intake port 11 to flow between the plurality of secondary batteries 50 . The cooling air flowing between the plurality of secondary batteries 50 flows through the plurality of secondary batteries 50 to the exhaust path 34 on the opposite side of the intake path 21 .

The exhaust path 31 is a path formed to exhaust the cooling air entering from the air inlet 11 to the outside of the temperature adjustment device 10 without flowing it between the plurality of secondary batteries 50 . The exhaust path 31 is formed outside the intake path 21, as shown in FIGS. The exhaust path 31 corresponds to a first exhaust path.

The exhaust path 32 is a path formed to discharge the cooling air that has passed between the secondary batteries 50 and through the exhaust path 34 to the outside of the temperature adjustment device 10 . As shown in FIGS. 2 and 4, the exhaust path 32 is formed outside the secondary battery 51 located on the outermost side on the same side as the intake port 11 (hereinafter referred to as the "intake port side"). The exhaust path 32 is formed adjacent to the end plate 61 fixing the plurality of secondary batteries 50 on the inlet side. The exhaust path 32 corresponds to a second exhaust path.

The exhaust path 33 is a path formed to discharge the cooling air that has passed between the secondary batteries 50 and through the exhaust path 34 to the outside of the temperature adjustment device 10 . As shown in FIGS. 2 and 4 , the exhaust path 33 is formed outside the secondary battery 52 located on the outermost side on the opposite side of the intake port 11 . The exhaust path 33 is formed adjacent to the end plate 62 fixing the plurality of secondary batteries 50 on the opposite side of the air inlet 11 . The exhaust path 33 is formed so that its cross-sectional area is smaller than that of the exhaust path 32 . The exhaust path 33 corresponds to a third exhaust path.

The exhaust port 41 is an opening formed to discharge the cooling air taken into the temperature adjustment device 10 to the outside. The exhaust port 41 is formed at the end of the exhaust path 31 opposite to the intake port 11 . The exhaust ports 42 and 43 are openings formed to discharge the cooling air that has passed between the secondary batteries 50 to the outside of the temperature adjustment device 10 . The exhaust ports 42, 43 are formed at the ends of the exhaust paths 32, 33, respectively.

As shown in FIG. 2 , an on-off valve 71 is installed in the vicinity of the exhaust port 41 of the exhaust path 31 . The on-off valve 71 opens and closes according to an open signal and a close signal transmitted by the control device 80, which will be described later. Specifically, the on-off valve 71 is closed when the cooling air does not enter from the intake port 11 . Also, when the cooling air enters from the air intake port 11, it is closed when the difference between the internal temperature of the exhaust path 31 and the external temperature of the temperature adjustment device 10 is less than a predetermined value. On the other hand, when the cooling air enters from the air intake port 11, the air outlet 11 is opened when the difference between the internal temperature of the exhaust path 31 and the external temperature of the temperature adjustment device 10 is equal to or greater than a predetermined value. An on-off valve 71 may be installed at the exhaust port 41 of the exhaust path 31 .

In addition, on-off valves 72 and 73 are installed in the vicinity of the exhaust ports 42 and 43 of the exhaust path 32 and the exhaust path 33, respectively. The on-off valves 72 and 73 open and close in accordance with an open signal and a close signal transmitted by a control device 80, which will be described later. Specifically, the on-off valves 72 and 73 are opened when the cooling air enters from the intake port 11 and closed when the cooling air does not enter from the intake port 11 . In addition, on-off valves 72 and 73 may be installed at the exhaust ports 42 and 43 of the exhaust path 32 and the exhaust path 33, respectively.

FIG. 5 is a diagram showing the configuration of a control device 80 that controls the on-off valves 71, 72, 73 provided in the temperature control device 10 according to one embodiment of the present invention. A specific example of the control device 80 is an ECU (Electronic Control Unit). The control device 80 includes a communication interface (I/F) 81 , a storage device 82 and an arithmetic device 83 . The communication I/F 81 is an interface for transmitting and receiving signals between the control device 80, the temperature adjustment device 10, and the temperature sensor. The storage device 82 is a storage device in which programs executed by the arithmetic device 83 and various information processed by the arithmetic device 83 are saved.

The computing device 83 is a computing device such as a CPU (Central Processing Unit) or an MPU (Micro Processing Unit). The arithmetic device 83 develops the control program 84 stored in the storage device 82 in the storage device within the arithmetic device 83 and executes it. The control program includes a monitoring unit 841, a switching control unit 842, a temperature difference calculation unit 843, and a temperature difference determination unit 844, which are program modules. The functions of these program modules may be realized by an integrated circuit such as FPGA (Field-Programmable Gate Array) or ASIC (Application Specific Integrated Circuit).

A monitoring unit 841 is a program module that determines whether or not the blower is being driven. In an embodiment in which the control device 80 controls the blower, the monitoring unit 841 can determine whether the blower is being driven based on information indicating the blower's driving state or stopped state provided by the program module that controls the blower. In an embodiment in which a device other than the control device 80 controls the blower, the monitoring unit 841 detects a control signal (a drive instruction signal, a stop instruction signal, etc.) transmitted when the blower is driven so that the blower is driven. It is possible to determine whether or not

The opening/closing control section 842 is a program module that controls opening/closing of the opening/closing valves 71 , 72 , and 73 . The temperature difference calculator 843 is a program for calculating the temperature difference between the inside of the exhaust path 31 and the outside of the temperature adjustment device 10 using the temperature value inside the exhaust path 31 and the temperature value outside the temperature adjustment device 10. is a module. The temperature value inside the exhaust path 31 can be provided to the controller 80 by a temperature sensor installed inside the exhaust path 31 . A temperature value outside the temperature adjustment device 10 can be provided to the control device 80 by a temperature sensor installed outside the temperature adjustment device 10 .

The temperature difference determination unit 844 is a program module that determines whether the temperature difference between the inside of the exhaust path 31 and the outside of the temperature adjustment device 10 is equal to or greater than a predetermined value. The default value can be, for example, 3° C., but is not limited to this value.

FIG. 6 is a flow chart showing processing executed by the control device 80 according to one embodiment of the present invention. In step S101, the monitoring unit 841 determines whether or not the blower is being driven. If the blower is not driven (NO), the process branches to step S102. In step S102, the opening/closing control unit 842 transmits a close signal to the opening/closing valves 71, 72, and 73, and the process returns to step S101.

On the other hand, if the blower is being driven (YES), the process branches to step S103. In step S<b>103 , the opening/closing control section 842 transmits open signals to the opening/closing valves 72 and 73 . In step S104, the temperature difference calculator 843 acquires the temperature value inside the exhaust path 31 and the temperature value outside the temperature adjustment device 10, and uses these temperature values to adjust the temperature inside the exhaust path 31. A temperature difference with the outside of the device 10 is calculated. In step S105, the temperature difference determination unit 844 determines whether or not the temperature difference calculated in step S104 is equal to or greater than a predetermined value.

If the temperature difference is less than the default value (NO), the process branches to step S106. In step S106, the opening/closing control unit 842 transmits a close signal to the opening/closing valve 71, and the process returns to step S101. On the other hand, if the temperature difference is greater than or equal to the default value (YES), the process branches to step S107. In step S107, the opening/closing control unit 842 transmits an open signal to the opening/closing valve 71, and the process returns to step S101.

In the above-described embodiment, the temperature adjustment device 10 includes the air inlet 11 for introducing cooling air into the temperature adjustment device 10 and the cooling air entering from the air inlet 11 to flow between the plurality of secondary batteries 50. and an exhaust path 31 formed to discharge the cooling air entering from the air intake port 11 to the outside of the temperature adjustment device 10 without flowing it between the plurality of secondary batteries 50. , an exhaust path 32 and an exhaust path 33 formed to discharge the cooling air that has passed between the plurality of secondary batteries 50 to the outside of the temperature adjustment device 10 .

The exhaust path 31 is formed outside the intake path 21 . As a result, the air in the exhaust path 31 functions as a heat insulating layer, so heat transfer between the air passing through the intake path 21 and the external environment (air, peripheral devices, etc.) of the temperature adjustment device 10 can be suppressed. That is, the influence of the external environment of the temperature adjustment device 10 on the air passing through the intake path 21 can be suppressed. Therefore, even when the external temperature of the temperature adjustment device 10 is high, it is possible to prevent the air passing through the air intake path 21 from being warmed, and to efficiently cool the secondary battery 50 . That is, the cooling performance of the temperature adjustment device 10 can be enhanced. As a result, deterioration of the secondary battery 50 can be suppressed, and the life of the secondary battery 50 can be extended.

An on-off valve 71 is installed in the vicinity of the exhaust port 41 of the exhaust path 31 . The on-off valve 71 is controlled to close when the cooling air does not enter from the intake port 11 . As a result, the outside air can be prevented from flowing into the exhaust path 31 from the exhaust port 41, and the effect of the exhaust path 31 as a heat insulating layer can be improved.

In addition, when the cooling air enters from the intake port 11, the on-off valve 71 of the exhaust path 31 is controlled to close when the difference between the internal temperature of the exhaust path 31 and the external temperature of the temperature adjustment device 10 is less than a predetermined value. be done. As a result, when the difference between these temperatures is less than the predetermined value, it is possible to prevent loss of the cooling air entering from the intake port 11 and improve the cooling performance of the temperature adjustment device 10 . When the difference between these temperatures is less than the predetermined value, the air passing through the intake path 21 is less affected by the external environment of the temperature adjustment device 10 . In other words, the heat insulation effect obtained by passing the cooling air through the exhaust path 31 and discharging it from the exhaust port 41 is small.

On the other hand, when the cooling air enters from the air intake port 11, the on-off valve 71 of the exhaust path 31 is controlled to open when the difference between the internal temperature of the exhaust path 31 and the external temperature of the temperature adjustment device 10 is equal to or greater than a predetermined value. be done. When the difference between these temperatures is equal to or greater than a predetermined value, the heat insulating effect obtained by passing the cooling air through the exhaust path 31 and discharging it from the exhaust port 41 is large. Therefore, it is only when such a heat insulating effect is large that the cooling air can be made to flow through the exhaust path 31 and be discharged from the exhaust port 41, and the performance of the exhaust path 31 as a heat insulating layer can be enhanced.

In addition, the exhaust path 32 is formed outside the secondary battery 51 located on the same side as the intake port 11 among the plurality of secondary batteries 50 , the outermost secondary battery 51 . As a result, the cooling air passing between the secondary batteries 50 passes outside the secondary batteries 51 . Therefore, the air in the exhaust path 32 functions as a heat insulating layer, and the influence of heat on the secondary battery 50 from the external environment of the temperature adjustment device 10 can be suppressed. That is, the heat retaining effect of the secondary battery 50 can be enhanced. As a result, variations in temperature among the plurality of secondary batteries 50 can be suppressed, and variations in capacity of the secondary batteries 50 can be suppressed.

Further, the exhaust path 33 is formed outside the secondary battery 52 positioned at the outermost side of the plurality of secondary batteries 50 on the side opposite to the intake port. As a result, the cooling air passing between the secondary batteries 50 passes outside the secondary batteries 52 . Therefore, the air in the exhaust path 33 functions as a heat insulating layer, and the influence of heat on the secondary battery 50 from the external environment of the temperature adjustment device 10 can be suppressed. That is, the heat retaining effect of the secondary battery 50 can be enhanced. As a result, variations in temperature among the plurality of secondary batteries 50 can be suppressed, and variations in capacity of the secondary batteries 50 can be suppressed.

Furthermore, on-off valves 72 and 73 are installed in the vicinity of the exhaust ports 42 and 43 of the exhaust path 32 and the exhaust path 33, respectively. The on-off valves 72 and 73 are controlled to close when the cooling air does not enter from the intake port 11 . As a result, external air can be prevented from flowing into the exhaust paths 32 and 33 through the exhaust ports 42 and 43, and the effect of the exhaust paths 32 and 33 as heat insulating layers can be improved.

FIG. 7 is a diagram showing the static pressure in the intake path, the static pressure in the exhaust path, and the differential pressure between them according to the distance from the end of the intake path 21 on the side of the intake port 11 . When the cross-sectional area of the exhaust path 32 and the cross-sectional area of the exhaust path 33 are the same, as shown in FIG. The differential pressure on the far side increases. Therefore, there is a difference in the amount of cooling air flowing between the secondary batteries 50, with the amount of cooling air increasing on the far side and the amount of cooling air decreasing on the front side. As a result, temperature variations occur among the plurality of secondary batteries 50 .

In the embodiment described above, the exhaust path 32 and the exhaust path 33 are formed such that the cross-sectional area of the exhaust path 33 is smaller than the cross-sectional area of the exhaust path 32 . As a result, the static pressure on the far side of the exhaust path 34 can be increased, and the differential pressure can be made uniform. As a result, the amount of cooling air flowing between the secondary batteries 50 becomes uniform, and variations in temperature among the plurality of secondary batteries 50 can be suppressed.

8 to 10 are diagrams showing the temperature of the secondary battery in the conventional temperature control device installed in the vehicle and the temperature of the secondary battery in the temperature control device 10 installed in the vehicle. FIG. 8 shows the maximum and minimum temperatures of the secondary battery while the vehicle is running and the maximum and minimum temperatures of the secondary battery after the vehicle is running when the external temperature and the intake air temperature are 30°C. Focusing on the temperature of the secondary battery after running the vehicle shown in FIG. and the minimum temperature difference. That is, in the temperature adjustment device 10, the degree of temperature variation among the plurality of secondary batteries is small. This is due to the excellent heat retention effect of the temperature control device 10 . In this way, by reducing the degree of variation in temperature among the plurality of secondary batteries, the temperature adjustment device 10 according to the present invention can suppress variation in capacity among the plurality of secondary batteries.

FIG. 9 shows the maximum and minimum temperatures of the secondary battery when the vehicle is running when the external temperature is 45° C. and the intake air temperature is 30° C., and the maximum and minimum temperatures of the secondary battery after the vehicle is running. is shown. Focusing on the temperature of the secondary battery during running of the vehicle shown in FIG. 9, the maximum temperature of the secondary battery in the temperature control device 10 is lower than the maximum temperature of the secondary battery in the conventional temperature control device. there is This is due to the excellent cooling effect of the temperature control device 10 . As a result, the difference between the maximum temperature and the minimum temperature of the secondary battery in the temperature control device 10 while the vehicle is running is smaller than the difference between the maximum temperature and the minimum temperature of the secondary battery in the conventional temperature control device. there is In this way, by reducing the degree of variation in temperature among the plurality of secondary batteries, the temperature adjustment device 10 according to the present invention can suppress variation in capacity among the plurality of secondary batteries.

FIG. 10 shows the maximum and minimum temperatures of the secondary battery when the vehicle is running when the external temperature is 5° C. and the intake air temperature is 30° C., and the maximum and minimum temperatures of the secondary battery after the vehicle is running. is shown. Focusing on the temperature of the secondary battery during running of the vehicle shown in FIG. 10, the minimum temperature of the secondary battery within the temperature control device 10 is higher than the minimum temperature of the secondary battery within the conventional temperature control device. there is This is due to the excellent heat retention effect of the temperature control device 10 . As a result, the difference between the maximum temperature and the minimum temperature of the secondary battery in the temperature control device 10 while the vehicle is running is smaller than the difference between the maximum temperature and the minimum temperature of the secondary battery in the conventional temperature control device. there is

In addition, focusing on the temperature of the secondary battery after running the vehicle shown in FIG. is high. This is due to the excellent heat retention effect of the temperature control device 10 . As a result, the difference between the maximum temperature and the minimum temperature of the secondary battery in the temperature control device 10 after the vehicle runs is also smaller than the difference between the maximum temperature and the minimum temperature of the secondary battery in the conventional temperature control device. there is

In this way, by reducing the degree of variation in temperature among the plurality of secondary batteries, the temperature adjustment device 10 according to the present invention can suppress variation in capacity among the plurality of secondary batteries.

<Other embodiments>
In the above-described embodiment, the temperature adjustment device 10 includes the exhaust paths 31, 32, and 33. However, in another embodiment, the exhaust path 31 is omitted and the temperature adjustment apparatus 10 includes the exhaust paths 32 and 33. good too. Further, in another embodiment, the exhaust paths 32 and 33 may be omitted, and the temperature adjustment device 10 may be configured to include the exhaust path 31 and the on-off valve 71 .

In the above examples, the programs can be stored and provided to the computer using various types of non-transitory computer readable media. Non-transitory computer-readable media include various types of tangible storage media. Examples of non-transitory computer-readable media include magnetic recording media (eg, floppy disks, magnetic tapes, hard disk drives), magneto-optical recording media (eg, magneto-optical discs), CD-ROMs, CD-Rs, CD-Rs /W, including semiconductor memory (eg, mask ROM, PROM (Programmable ROM), EPROM (Erasable PROM), flash ROM, RAM); The program may also be provided to the computer on various types of transitory computer readable medium. Examples of transitory computer-readable media include electrical signals, optical signals, and electromagnetic waves. Transitory computer-readable media can deliver the program to the computer via wired channels, such as wires and optical fibers, or wireless channels.

The present invention is not limited to the above-described embodiments, and can be modified as appropriate without departing from the scope of the present invention.

10 Temperature adjustment device 11 Intake port 21 Intake paths 31 to 34 Exhaust paths 41 to 43 Exhaust ports 50 to 52 Secondary batteries 61, 62 End plates 71 to 73 Open/close valve

Claims (4)

A temperature adjustment device that accommodates a plurality of arranged secondary batteries and adjusts the temperature of the plurality of secondary batteries,
an air inlet for introducing cooling air into the temperature adjustment device;
an air intake path formed to allow cooling air entering from the air intake to flow between the plurality of secondary batteries;
a first exhaust path formed to exhaust the cooling air entering from the air inlet to the outside of the temperature adjustment device without flowing between the plurality of secondary batteries;
a second exhaust path and a third exhaust path formed to discharge the cooling air that has passed between the plurality of secondary batteries to the outside of the temperature adjustment device,
The first exhaust path is formed outside the intake path,
wherein the second exhaust path is formed outside the secondary battery positioned outermost on the same side as the air inlet among the plurality of secondary batteries,
wherein the third exhaust path is formed outside the secondary battery located at the outermost side of the plurality of secondary batteries on a side opposite to the air inlet ,
An on-off valve is installed at the exhaust port of the first exhaust path or in the vicinity of the exhaust port,
The on-off valve of the first exhaust path is controlled to close when cooling air does not enter from the intake port,
The on-off valve of the first exhaust path is operated when the difference between the internal temperature of the first exhaust path and the external temperature of the temperature adjustment device is less than a predetermined value when cooling air enters from the intake port. closed and controlled to open when the difference between the internal temperature of the first exhaust path and the external temperature of the temperature control device is equal to or greater than a predetermined value;
temperature control device. An on-off valve is installed at the exhaust port of the second exhaust path and the third exhaust path or in the vicinity of the exhaust port,
2. The temperature control device according to claim 1, wherein said on-off valves of said second exhaust path and said third exhaust path are controlled to close when cooling air does not enter from said intake port. 3. The temperature control device according to claim 1 , wherein the cross-sectional area of said third exhaust path is smaller than the cross-sectional area of said second exhaust path. A temperature adjustment device that accommodates a plurality of arranged secondary batteries and adjusts the temperature of the plurality of secondary batteries,
an air inlet for introducing cooling air into the temperature adjustment device;
an air intake path formed to allow cooling air entering from the air intake to flow between the plurality of secondary batteries;
an exhaust path configured to discharge the cooling air entering from the air inlet to the outside of the temperature adjustment device without flowing between the plurality of secondary batteries,
The exhaust path is formed outside the intake path,
An on-off valve is installed at the exhaust port of the exhaust path or in the vicinity of the exhaust port,
The on-off valve is
controlled to be closed when cooling air does not enter from the intake port;
When the cooling air enters from the intake port, it is closed when the difference between the internal temperature of the exhaust path and the external temperature of the temperature control device is less than a predetermined value, and the internal temperature of the exhaust path and the temperature control device is closed. Controlled to open when the difference with the outside temperature is greater than or equal to a preset value,
temperature control device.

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