CN220830019U

CN220830019U - Battery box and battery pack

Info

Publication number: CN220830019U
Application number: CN202322593288.5U
Authority: CN
Inventors: 晏梓铭; 赵玺凯; 尚靖清; 李文龙; 侯敏; 曹辉
Original assignee: Shanghai Ruipu Energy Co Ltd
Current assignee: Shanghai Ruipu Energy Co Ltd
Priority date: 2023-09-22
Filing date: 2023-09-22
Publication date: 2024-04-23
Anticipated expiration: 2033-09-22

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery box and a battery pack, wherein the battery box comprises a box body, a heat conducting partition plate, a semiconductor refrigerating sheet and an air supply device, wherein the box body is provided with an installation cavity, the heat conducting partition plate divides the installation cavity into a first cavity and a second cavity, the first cavity is used for installing a battery module, a vent hole communicated with the first cavity and the second cavity is formed in the heat conducting partition plate, the semiconductor refrigerating sheet is arranged in the first cavity, a heat absorbing surface of the semiconductor refrigerating sheet is used for absorbing heat of the battery module and air in the first cavity, the heat absorbing surface is in heat conducting connection with the heat conducting partition plate, the air supply device is arranged on the box body, low-temperature air cooled in the first cavity can flow into the second cavity through the air supply device, and the low-temperature air in the second cavity cools the heat conducting partition plate, so that the cooling efficiency of the semiconductor refrigerating sheet on the battery module is improved.

Description

Battery box and battery pack

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery box and a battery pack.

Background

At present, in the technical field of battery energy storage, air cooling and liquid cooling are mainstream cooling modes. Air cooling has certain requirements on air inlet temperature, often needs to be matched with a cooling device for cooling the air inlet, is limited by physical characteristics of air, and easily causes the problem of uneven cooling of the battery module. The liquid cooling mode can improve the homogeneity to battery module cooling, but liquid cooling system's pipeline and valve part quantity are more, and the risk of taking place the weeping is great to liquid cooling system's cost is also relatively higher.

In order to solve the technical problems, the prior art proposes a technical scheme for cooling a battery module by using a semiconductor refrigeration sheet, specifically, the semiconductor refrigeration sheet is additionally arranged in a battery box for installing the battery module, so that a heat absorption surface of the semiconductor refrigeration sheet is attached to the bottom of the battery module, and the battery module is cooled.

However, in the above technical solution, after the heat absorption surface of the semiconductor refrigeration sheet absorbs the heat of the battery module, the heat is transferred to the heat release surface of the semiconductor refrigeration sheet, and then the heat release surface transfers the heat to the internal environment of the battery box, which causes the temperature of the internal environment of the battery box to rise, and reduces the cooling efficiency of the battery module.

Therefore, it is necessary to provide a battery case and a battery pack to solve the above technical problems.

Disclosure of utility model

A first object of the present utility model is to provide a battery box capable of improving cooling efficiency of a battery module.

To achieve the purpose, the utility model adopts the following technical scheme:

A battery box, comprising:

the box body is provided with an installation cavity;

The heat conduction partition plate is arranged in the installation cavity and divides the installation cavity into a first cavity and a second cavity, the first cavity is used for installing the battery module, the heat conduction partition plate is provided with a vent hole, and the first cavity and the second cavity are communicated through the vent hole;

The semiconductor refrigerating sheet is arranged in the first cavity and comprises a heat absorbing surface and a heat releasing surface, the heat absorbing surface is used for absorbing heat of air in the battery module and the first cavity, and the heat releasing surface is in heat conduction connection with the heat conducting partition plate;

And the air supply device is arranged on the box body, and air in the first cavity can flow into the second cavity through the air supply device.

Optionally, the air supply device comprises an exhaust fan, the exhaust fan is installed on the box body, the air inlet side of the exhaust fan is communicated with the second cavity, and the air outlet side of the exhaust fan is communicated with air outside the box body.

Optionally, the heat conducting partition plate is provided with a heat radiating fin, and the heat radiating fin is located in the second cavity.

Optionally, the extending direction of the cooling fin is the same as the exhaust direction of the exhaust fan.

Optionally, the air supply device comprises an exhaust fan, the exhaust fan is installed on the box body, the air inlet side of the exhaust fan is communicated with air outside the box body, and the air outlet side of the exhaust fan is communicated with the first cavity.

Optionally, the vent hole and the air supply device are respectively located at two opposite ends of the box body.

Optionally, the heat release surface and the heat conducting partition plate are bonded through heat conducting glue.

Optionally, the heat absorbing surface is attached to the battery module.

A second object of the present utility model is to provide a battery pack having high safety and reliability in use.

The battery pack comprises a battery module and the battery box, and the battery module is installed in the first cavity.

Optionally, the battery pack further includes a BMS including a slave plate mounted on the case, the slave plate being electrically connected with the battery module.

The beneficial effects are that:

The battery box provided by the utility model is provided with the heat-conducting partition plate, the semiconductor refrigerating sheet and the air supply device, the heat-conducting partition plate divides the installation cavity of the box body into the first cavity and the second cavity, the heat-conducting partition plate is provided with the vent holes which can be communicated with the first cavity and the second cavity, the battery module and the semiconductor refrigerating sheet are both arranged in the first cavity, the heat-absorbing surface of the semiconductor refrigerating sheet absorbs the heat of the battery module and the air in the first cavity, the heat-absorbing surface is in heat conduction connection with the heat-conducting partition plate, so that the heat absorbed by the heat-absorbing surface can be transmitted to the heat-conducting partition plate through the heat-releasing surface, the low-temperature air cooled in the first cavity enters the second cavity through the vent holes under the action of the air supply device, and the low-temperature air cools the heat-conducting partition plate in the second cavity, thereby improving the cooling efficiency of the heat-conducting partition plate on the heat-releasing surface and finally improving the cooling efficiency of the semiconductor refrigerating sheet on the battery module.

The battery pack provided by the utility model adopts the battery box, and the battery module can be rapidly cooled in the battery box, so that the battery pack has higher use safety and reliability.

Drawings

Fig. 1 is a schematic view of an exploded structure of a battery pack provided in the present embodiment;

Fig. 2 is a schematic view showing the structure of an end plate of the battery pack according to the present embodiment;

fig. 3 is a schematic structural view of a heat conductive separator plate according to the present embodiment;

Fig. 4 is a schematic structural view of a semiconductor refrigeration sheet according to the present embodiment;

fig. 5 is a schematic structural view of the battery box provided in the present embodiment;

fig. 6 is a schematic structural view of the end plate provided in the present embodiment.

In the figure:

10. A battery module; 11. a cell group; 12. an air duct; 20. a slave plate;

100. A thermally conductive separator plate; 110. a vent hole; 120. a heat sink; 210. a first cavity; 220. a second cavity; 231. a case cover; 232. a bottom plate; 233. an end plate; 300. a semiconductor refrigeration sheet; 310. a heat absorbing surface; 321. a wire outlet end; 322. connecting wires; 410. an exhaust fan; 420. and (5) an exhaust fan.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood as appropriate by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

The embodiment provides a battery box capable of improving cooling efficiency of a battery module.

Specifically, as shown in fig. 1 to 4, the battery box includes a box body, a heat-conducting separator 100, a semiconductor refrigeration sheet 300 and an air supply device, wherein the box body is provided with an installation cavity, the heat-conducting separator 100 is arranged in the installation cavity, the heat-conducting separator 100 divides the installation cavity into a first cavity 210 and a second cavity 220, the first cavity 210 is used for installing the battery module 10, the heat-conducting separator 100 is provided with a vent 110, the first cavity 210 and the second cavity 220 are communicated through the vent 110, the semiconductor refrigeration sheet 300 is arranged in the first cavity 210, the semiconductor refrigeration sheet 300 includes a heat absorbing surface 310, a heat releasing surface, two outlet ends 321 and two connecting wires 322, the two connecting wires 322 are respectively arranged at the two outlet ends 321, the two connecting wires 322 are respectively communicated with a power supply, so that the heat absorbing surface 310 of the semiconductor refrigeration sheet 300 can absorb heat of air in the battery module 10 and the first cavity 210, the heat releasing surface of the semiconductor refrigeration sheet 300 is in heat-conducting connection with the separator 100, and the air supply device is arranged on the box body 210, and the air supply device can flow into the second cavity 220.

Based on the design, this battery box is equipped with heat conduction baffle 100, semiconductor refrigeration piece 300 and air supply arrangement, heat conduction baffle 100 separates the installation cavity of box into first cavity 210 and second cavity 220, and be equipped with the ventilation hole 110 that can communicate first cavity 210 and second cavity 220 on the heat conduction baffle 100, battery module 10 and semiconductor refrigeration piece 300 all set up in first cavity 210, after the semiconductor refrigeration piece 300 is circular telegram, its heat absorption face 310 absorbs the heat of the air in battery module 10 and the first cavity 210, the heat transfer face gives heat conduction baffle 100 with the heat that heat absorption face 310 absorbed, under air supply arrangement's effect, the low temperature air that is cooled down in the first cavity 210 gets into in the second cavity 220 through ventilation hole 110, the low temperature air cools down heat conduction baffle 100 in the second cavity 220, and then the cooling efficiency of heat conduction baffle 100 to the heat release face has been improved, finally, the cooling efficiency of semiconductor refrigeration piece 300 to battery module 10 has been improved.

On the other hand, the low-temperature air cooled in the first cavity 210 can cool the battery module 10 in the first cavity 210, that is, the battery module 10 can transfer heat to the heat absorbing surface 310 of the semiconductor cooling sheet 300 and also transfer heat to the low-temperature air in the first cavity 210, thereby realizing the effect of simultaneously cooling the battery module 10 by the semiconductor cooling sheet 300 and the low-temperature air and further improving the cooling efficiency of the battery module 10.

It should be noted that, the temperature difference between the heat absorbing surface 310 and the heat releasing surface of the semiconductor refrigeration sheet 300 is relatively large (typically 50 ℃ -60 ℃), so that the air in the first cavity 210 is cooled by the heat absorbing surface 310 to be low-temperature air, and after the low-temperature air cools the battery module 10 in the first cavity 210, the temperature of the heat releasing surface can raise the temperature of the battery box, and the cooling efficiency is reduced. Therefore, the battery module 10 is isolated by the heat-conducting separator 100 in this embodiment, so that the heat of the heat release surface is prevented from affecting the cooling of the battery module 10 (the heat release surface transfers the heat to the heat-conducting separator 100; thus, the heat of the heat release surface is prevented from affecting the cooling of the battery module 10). Meanwhile, the two cavities adopt the separation design of the semiconductor refrigeration piece 300, so that the cold energy of the semiconductor refrigeration piece 300 can be fully utilized, and the heat absorbing surface 310 can transfer heat to the heat conducting partition plate 100, so that the energy consumption is saved.

Optionally, the heat release surface is bonded to the heat conductive partition 100 through a heat conductive adhesive, so as to realize heat conductive connection between the heat release surface and the heat conductive partition 100, and further, the semiconductor refrigeration sheet 300 is fixed on the heat conductive partition 100. Of course, in other embodiments, the heat-dissipating surface may be attached to a surface of the heat-conducting partition 100 located in the first cavity 210, or a metal sheet or other heat-conducting medium may be disposed between the heat-dissipating surface and the heat-conducting partition 100, which may also achieve heat-conducting connection between the heat-dissipating surface and the heat-conducting partition 100.

Alternatively, the heat absorbing surface 310 is attached to the battery module 10, so that the heat absorbing surface 310 can absorb the heat of the battery module 10, however, in other embodiments, the heat absorbing surface 310 may be spaced from the battery module 10, and the effect of the heat absorbing surface 310 absorbing the heat of the battery module 10 may be achieved.

Preferably, in order to improve the cooling effect of the heat absorbing surface 310 on the battery module 10, the large surface of the battery module 10 is preferably attached to the heat absorbing surface 310.

Optionally, the ventilation holes 110 and the air supply device are respectively located at opposite ends of the box, so as to prolong the flowing distance of air in the first cavity 210 and the second cavity 220 as far as possible, and improve the cooling effect of the heat absorbing surface 310 of the semiconductor refrigeration sheet 300 on the air in the first cavity 210, the cooling effect of the low-temperature air in the first cavity 210 on the battery module 10, and the cooling effect of the low-temperature air in the second cavity 220 on the heat conducting partition plate 100.

Alternatively, as shown in fig. 1 to 5, the heat conducting spacer 100 is provided with the heat dissipating fins 120, the heat dissipating fins 120 are located in the second cavity 220, the heat conducting spacer 100 transfers heat to the heat dissipating fins 120, and the low-temperature air entering the second cavity 220 can cool the surface of the heat conducting spacer 100 facing the second cavity 220 and can cool the heat dissipating fins 120, so that the effect of improving the cooling efficiency of the heat conducting spacer 100 is achieved.

Further, as shown in fig. 1 to 5, the number of the heat dissipation fins 120 is plural, and the plurality of heat dissipation fins 120 are arranged at intervals, so as to further improve the cooling efficiency of the heat conduction separator 100, and further improve the cooling efficiency of the heat dissipation surface of the semiconductor refrigeration fin 300 and the cooling efficiency of the battery module 10.

Alternatively, as shown in fig. 1 to 5, the air supply device includes an exhaust fan 410, the exhaust fan 410 is mounted on the box, the air inlet side of the exhaust fan 410 is communicated with the second cavity 220, the air outlet side of the exhaust fan 410 is communicated with the air outside the box, the low-temperature air in the first cavity 210 is pumped into the second cavity 220 under the action of the exhaust fan 410, and the air in the second cavity 220 can be further discharged outside the box, so that the circulation of the air between the first cavity 210, the second cavity 220 and the air outside the box is realized, and the cooling efficiency of the heat conducting partition 100 is improved.

Further, as shown in fig. 1 to 5, the extending direction of the heat sink 120 is the same as the exhaust direction of the exhaust fan 410, i.e., the extending direction of the gas flow path between two adjacent heat sinks 120 is the same as the exhaust direction of the exhaust fan 410, and the structural arrangement reduces the resistance of the air flow in the second cavity 220, so that the flow velocity of the air in the first and second cavities 210 and 220 can be improved, thereby having the effect of improving the cooling efficiency of the battery module 10 and the heat conductive separator 100.

Optionally, as shown in fig. 1 to 5, the air supply device includes an air extraction fan 420, the air extraction fan 420 is installed on the box, the air inlet side of the air extraction fan 420 is communicated with air outside the box, the air outlet side of the air extraction fan 420 is communicated with the first cavity 210, under the action of the air extraction fan 420, air outside the box enters the first cavity 210, and air in the first cavity 210 can be further conveyed into the second cavity 220, so that ventilation among air outside the box, the first cavity 210 and the second cavity 220 is realized, and cooling efficiency of the heat conducting partition plate 100 is improved.

It should be noted that, in this embodiment, the box is provided with both the exhaust fan 420 and the exhaust fan 410, the exhaust fan 420 and the exhaust fan 410 are located on the same side of the box, and the exhaust fan 420 and the exhaust fan 410 are disposed opposite to the ventilation hole 110, so as to extend the flowing distance of the air in the first cavity 210 and the second cavity 220. In actual use, if the mounting positions of the exhaust fan 420 and the exhaust fan 410 are relatively close, a baffle (not shown in the figure) may be disposed between the exhaust fan 410 and the exhaust fan 420 to separate the air outlet side of the exhaust fan 410 from the air inlet side of the exhaust fan 420, so as to avoid the problem of mutual interference between the exhaust fan 410 and the exhaust fan 420.

In addition, the number of the exhaust fans 420 and 410 may be determined according to actual use requirements, for example, the exhaust fans 420 in the present embodiment are set to one, and the exhaust fans 410 are set to two, where the number of the exhaust fans 420 and 410 is not particularly limited.

Alternatively, as shown in fig. 1 to 6, the case body includes a case cover 231, a bottom plate 232, and an end plate 233, where the case cover 231 is fastened to the bottom plate 232 to form an open case, and the end plate 233 is plugged at an opening of the open case, thereby forming a mounting cavity between the case cover 231, the bottom plate 232, and the end plate 233. It will be appreciated that in other embodiments, the case may take other forms, for example, a case formed by a base plate and a cover plate that are fastened together, etc., as required by the actual use.

Further, the exhaust fan 420, the exhaust fan 410 and the baffle are all mounted on the end plate 233, so that the exhaust fan 420, the exhaust fan 410, the baffle and the box are assembled conveniently, and the effects of reducing the assembly difficulty of the box and improving the production efficiency are achieved.

Alternatively, as shown in fig. 1 to 6, the heat conductive separator plate 100 is horizontally disposed in the installation cavity to divide the installation cavity into the first cavity 210 and the second cavity 220 in the vertical direction, and the semiconductor cooling sheet 300 and the battery module 10 are disposed on the surface of the heat conductive separator plate 100 located in the first cavity 210, so that the heat conductive separator plate 100 can support the semiconductor cooling sheet 300 and the battery module 10, omitting the supporting parts of the battery module 10 in the case, and having the effects of reducing the cost and the overall volume of the battery case. Of course, in other embodiments, the heat-conducting partition 100 may be disposed vertically or obliquely in the installation cavity, according to the actual use requirement.

Further, the surface area of the heat conductive partition plate 100 is the same as the surface area of the bottom plate 232 in the horizontal direction, the volume of the heat conductive partition plate 100 is expanded as much as possible, and the structural strength and heat conductive efficiency of the heat conductive partition plate 100 are improved.

It should be noted that the materials and the production molding process of the case cover 231, the bottom plate 232, the end plate 233, the heat conductive partition 100, and the heat sink 120 are not particularly limited in this embodiment, and the case cover 231, the bottom plate 232, and the end plate 233 may be made of aluminum or steel, and the case cover 231 and the bottom plate 232 may be made of sheet metal bending process or sheet metal splicing and welding process, which are not specifically mentioned herein. The heat conducting partition plate 100 and the heat radiating fins 120 may be made of copper or aluminum, and the heat conducting partition plate 100 and the heat radiating fins 120 may be fixed by welding, or may be integrally formed, which is not shown here.

The cooling mode of the battery module 10 at the time of actual use of the battery box provided in the present embodiment is briefly described below:

after the semiconductor refrigerating sheet 300 is electrified, the heat absorbing surface 310 cools the battery module 10, the heat absorbing surface transfers heat to the heat conducting partition plate 100 through the heat conducting glue, and the heat conducting partition plate 100 transfers heat to the heat radiating sheet 120;

Meanwhile, the heat absorbing surface 310 also cools the air in the first cavity 210, the air in the first cavity 210 is cooled to low temperature air, the battery module 10 is secondarily cooled, and the low temperature air in the first cavity 210 enters the second cavity 220 through the ventilation opening under the action of the ventilation fan 420 and the ventilation fan 410, the low temperature air cools the surfaces of the heat radiating fin 120 and the heat conducting partition plate 100 facing the side of the second cavity 220 in the second cavity 220, and the ventilation fan 410 discharges the low temperature air absorbing the heat of the heat radiating fin 120 and the heat conducting partition plate 100 out of the box, so as to discharge the heat of the battery module 10 out of the box.

The battery box provided by the embodiment adopts the semiconductor refrigeration piece 300 to cool the battery module 10, and liquid cooling devices such as a liquid cooling plate and the like are not needed, so that the risk of liquid leakage is avoided; the ventilation fan 420 and the exhaust fan 410 are arranged on the box body, so that the ventilation of air between the first cavity 210 and the second cavity 220 can be realized, and the cost of the refrigeration auxiliary equipment is lower; the low-temperature air in the semiconductor refrigerating plate 300 and the first cavity 210 simultaneously cool the battery module 10, and after the low-temperature air cools the battery module 10, the cooling fin 120 and the heat conducting partition plate 100 in the second cavity 220 can be cooled, so that the secondary cooling of the battery module 10 is realized, the multi-stage utilization of the refrigerating capacity of the semiconductor refrigerating plate 300 is realized, and the cooling efficiency is improved while the energy consumption is reduced; the heat conductive separator plate 100 has a plurality of heat dissipation fins 120 disposed at a side facing the second cavity 220, thereby further improving heat dissipation efficiency of the heat dissipation surface, and further improving cooling efficiency of the battery module 10.

The embodiment also provides a battery pack which has higher use safety and reliability.

Specifically, the battery pack includes the battery module 10 and the battery case described above, the battery module 10 is mounted in the first cavity 210, and the battery pack employs the battery case described above, in which the battery module 10 can be rapidly cooled, thus having high safety and reliability in use.

Alternatively, as shown in fig. 1 to 6, the battery module 10 includes at least two battery cell groups 11, at least two battery cell groups 11 are disposed at intervals, an air duct 12 is formed between two adjacent battery cell groups 11, and an extending direction of the air duct 12 is the same as an air supply direction of the air suction fan 420, so as to reduce flow resistance of air in the first cavity 210 and improve heat dissipation efficiency of the battery module 10.

Further, in this embodiment, the number of the battery cell groups 11 is two, an air duct 12 is formed between the two battery cell groups 11, the number of the exhaust fans 420 is one, one exhaust fan 420 is opposite to one air duct 12, and the ventilation holes 110 and the exhaust fans 420 are located at opposite ends of the air duct 12, so that convection is formed between the exhaust fans 420 and the ventilation holes 110, and the flow resistance of the air in the first cavity 210 is further reduced.

Optionally, as shown in fig. 1 to 6, the Battery pack further includes a Battery management system (Battery MANAGEMENT SYSTEM, BMS), the BMS includes a slave board 20 and a main board (not shown in the drawings), the slave board 20 is mounted on the end plate 233, the Battery module 10 and the main board are electrically connected to the slave board 20, the slave board 20 monitors charge and discharge conditions of the Battery module 10, and transmits monitored data (data such as voltage and temperature) to the main board.

Further, the slave board 20 is electrically connected to the semiconductor cooling fin 300, the suction fan 420 and the exhaust fan 410, so as to supply power to the semiconductor cooling fin 300, the suction fan 420 and the exhaust fan 410 from the slave board 20 (i.e., the two connection wires 322 of the semiconductor cooling fin 300 are electrically connected to the slave board 20, respectively).

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims

1. The battery box, its characterized in that includes:

The box body is provided with an installation cavity;

The heat conduction clapboard (100), the heat conduction clapboard (100) is arranged in the installation cavity, the installation cavity is divided into a first cavity (210) and a second cavity (220) by the heat conduction clapboard (100), the first cavity (210) is used for installing the battery module (10), the heat conduction clapboard (100) is provided with a vent hole (110), and the first cavity (210) and the second cavity (220) are communicated through the vent hole (110);

The semiconductor refrigerating sheet (300) is arranged in the first cavity (210), the semiconductor refrigerating sheet (300) comprises a heat absorbing surface (310) and a heat releasing surface, the heat absorbing surface (310) is used for absorbing heat of air in the battery module (10) and the first cavity (210), and the heat releasing surface is in heat conducting connection with the heat conducting partition plate (100);

And the air supply device is arranged on the box body, and air in the first cavity (210) can flow into the second cavity (220) through the air supply device.

2. The battery box according to claim 1, wherein the air supply device comprises an exhaust fan (410), the exhaust fan (410) is mounted on the box body, an air inlet side of the exhaust fan (410) is communicated with the second cavity (220), and an air outlet side of the exhaust fan (410) is communicated with air outside the box body.

3. The battery box according to claim 2, wherein the heat conducting separator (100) is provided with a heat sink (120), and the heat sink (120) is located in the second cavity (220).

4. A battery box according to claim 3, characterized in that the direction of extension of the cooling fins (120) is the same as the exhaust direction of the exhaust fan (410).

5. The battery box according to any one of claims 1-4, wherein the air supply device comprises an air suction fan (420), the air suction fan (420) is mounted on the box body, an air inlet side of the air suction fan (420) is communicated with air outside the box body, and an air outlet side of the air suction fan (420) is communicated with the first cavity (210).

6. The battery box according to any one of claims 1-4, wherein the vent (110) and the air supply device are located at opposite ends of the box body, respectively.

7. The battery box according to any one of claims 1 to 4, characterized in that the heat release surface is bonded to the heat conductive separator plate (100) by a heat conductive adhesive.

8. The battery box according to any one of claims 1 to 4, wherein the heat absorbing surface (310) is attached to the battery module (10).

9. Battery pack, characterized by comprising a battery module (10) and a battery compartment according to any of claims 1-8, said battery module (10) being mounted in said first cavity (210).

10. The battery pack according to claim 9, further comprising a BMS including a slave plate (20), the slave plate (20) being mounted on the case, the slave plate (20) being electrically connected with the battery module (10).