Exhaust cooling device, battery pack and electric equipment

Abstract

The utility model discloses an exhaust cooling device, a battery pack and electric equipment. The exhaust cooling device comprises a shell, an exhaust fan and a cooling device, the exhaust channel is arranged in the shell, one end of the exhaust channel is communicated with the battery cell, and the other end of the exhaust channel is communicated with the outside; and the cooling unit is arranged in the shell and wraps the periphery of the exhaust channel, and the cooling unit comprises a phase change piece used for absorbing heat during phase change. The exhaust cooling devices are arranged on the two sides of the battery cell, gas exhausted by the battery cell can directly enter the exhaust channel, and when the battery cell is subjected to thermal runaway and sprays a high-temperature gas-liquid mixture outwards, the cooling unit can cool high-temperature gas while absorbing heat generated by the thermal runaway, so that the thermal runaway of the battery cell is reduced, and the service life of the battery cell is prolonged. Thermal runaway spreading is prevented or the thermal runaway spreading speed is delayed. The phase change pieces are arranged in the cooling units on the two sides of the battery cell, the space on the two sides of the battery cell is fully utilized, the overall size is reduced, the phase change pieces are arranged in a centralized mode, more phase change pieces can be arranged, and the cooling performance of the cooling units is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to an exhaust cooling device, a battery pack and an electrical equipment. Background Art

[0002] With the gradual popularization of new energy vehicles, power battery packs have been widely used. During the use of power battery packs, the factors that cause thermal runaway of power battery packs include but are not limited to high temperature, overcharge, over-discharge, short circuit, puncture, extrusion, etc. Since the use environment of power battery packs is very complex, it is often impossible to completely avoid the occurrence of thermal runaway. Therefore, how to conduct thermal safety protection design for power battery packs, enable power battery packs to have the ability to avoid or delay the occurrence of thermal runaway and spread heat to adjacent components, and minimize the risk and harm of thermal diffusion is an urgent problem to be solved at present.

[0003] In the related art, a power battery pack includes a housing, battery cells and a heat absorber. The housing is provided with an exhaust passage. The battery cells are accommodated in the housing. The heat absorber is accommodated in the housing and adjacent to the battery cells. The heat absorber includes a phase change material. The phase change material is used to switch between at least two phases of solid phase, liquid phase and gas phase, and absorb the heat transferred from the battery cells to the heat absorber during the phase change process, control the temperature of the battery cells within the normal range, avoid the occurrence of thermal runaway of the power battery pack and affect the performance of the power battery pack. By providing an exhaust hole communicated with the exhaust passage, the gaseous phase change material can be discharged from the heat absorber to the outside of the housing, preventing the air pressure and temperature of the heat absorber from being too high, which is beneficial to reducing the risk of thermal diffusion of the power battery pack and improving the safety and reliability of the power battery pack.

[0004] However, the above design arranges the phase change material between the battery cells, increasing the overall volume of the module, resulting in a decrease in the power volume density of the module; the phase change material is dispersedly arranged in the module, the volume ratio of the sealing structure is high, and the amount of phase change material that can be arranged is small; and the treatment of the high-temperature gas ejected by the battery during thermal runaway is not considered. Summary of the Utility Model

[0005] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, the utility model provides an exhaust cooling device. By arranging the exhaust cooling device on both sides of the battery cells, the gas discharged from the battery cells can directly enter the exhaust passage, preventing the spread of thermal runaway or delaying the spread speed of thermal runaway.

[0006] The utility model further provides a battery pack.

[0007] The utility model also provides an electrical equipment.

[0008] An exhaust cooling device according to an embodiment of the first aspect of the present utility model includes: a housing; an exhaust passage disposed within the housing, one end of the exhaust passage communicating with an electric core and the other end communicating with the outside; a cooling unit disposed within the housing and wrapped around the outer periphery of the exhaust passage, the cooling unit including: a phase change member configured to absorb heat during phase change.

[0009] According to the exhaust cooling device of the embodiment of the present utility model, by arranging the exhaust cooling device on both sides of the electric core, the gas discharged from the electric core can directly enter the exhaust passage. When the electric core undergoes thermal runaway and ejects a high-temperature gas-liquid mixture outward, while the cooling unit absorbs the heat generated by the thermal runaway, it can also cool the high-temperature gas, preventing the spread of thermal runaway or delaying the spread speed of thermal runaway. The phase change member is arranged within the cooling unit on both sides of the electric core, making full use of the space on both sides of the electric core to reduce the overall volume. The phase change members are centrally arranged, and the overall occupied volume is smaller compared to the dispersed arrangement. The saved space can be used to arrange more phase change members, improving the cooling performance of the cooling unit.

[0010] According to some embodiments of the present utility model, the phase change member is one or more of an alkane phase change member, a metal phase change member, a fatty acid phase change member, and a hydrogel phase change member.

[0011] According to some embodiments of the present utility model, a drainage cavity is provided on one side of the cooling unit facing the electric core, one end of the drainage cavity being disposed opposite to the electric core and the other end communicating with the exhaust passage.

[0012] According to some embodiments of the present utility model, there are a plurality of the drainage cavities and a plurality of the exhaust passages, the plurality of drainage cavities and the plurality of exhaust passages being arranged in one-to-one correspondence, and the plurality of drainage cavities respectively corresponding to a plurality of electric cores one-to-one.

[0013] According to some embodiments of the present utility model, there is one drainage cavity and one exhaust passage, the drainage cavity corresponding to a plurality of electric cores.

[0014] According to some embodiments of the present utility model, the exhaust cooling device further includes: a breathable membrane disposed at the connection between the drainage cavity and the exhaust passage, the breathable membrane selectively conducting the drainage cavity and the exhaust passage.

[0015] According to some embodiments of the present utility model, the exhaust cooling device further includes: at least one baffle, at least one of the baffles being connected to the housing, the baffle being clamped between two electric cores.

[0016] According to some embodiments of the present utility model, the baffle is a heat-conducting baffle.

[0017] According to some embodiments of the present utility model, at least one heat dissipation fin is provided on the inner wall of the exhaust passage.

[0018] According to some embodiments of the present utility model, the cooling unit further includes: a skeleton, the phase change member is wrapped outside the skeleton, and the skeleton is a metal skeleton.

[0019] The battery pack according to the embodiment of the second aspect of the present utility model includes: a package body, a first exhaust hole is provided on the package body; a plurality of battery cells, the plurality of battery cells are arranged in the package body, and a second exhaust hole is provided on the battery cells; the exhaust cooling device, the exhaust cooling device is arranged in the package body, one end of the exhaust passage is communicated with the first exhaust hole and the other end is communicated with the second exhaust hole.

[0020] According to some embodiments of the present utility model, a first explosion-proof valve is provided on the package body, the first explosion-proof valve is arranged at the first exhaust hole, a second explosion-proof valve is provided on the battery cell, the second explosion-proof valve is arranged at the second exhaust hole, and both ends of the exhaust passage correspond to the first explosion-proof valve and the second explosion-proof valve respectively.

[0021] The electrical equipment according to the embodiment of the third aspect of the present utility model includes the battery pack.

[0022] By arranging the exhaust cooling device on both sides of the battery cell, the internal space of the battery pack is fully utilized. The gas discharged from the battery cell can directly enter the exhaust passage under the guidance of the diversion cavity. When the battery cell has a thermal runaway and ejects a high-temperature gas-liquid mixture outward, while the cooling unit absorbs the heat generated by the thermal runaway, it can also cool the high-temperature gas to prevent the spread of the thermal runaway or delay the spread speed of the thermal runaway. The phase change member is arranged in the cooling unit on both sides of the battery cell, reducing the overall volume of the battery pack. The phase change members are arranged centrally, and the overall occupied volume is smaller compared to the dispersed arrangement. The saved space can be used to arrange more phase change members to improve the cooling performance of the cooling unit, and through structures such as heat dissipation fins or metal skeletons, the cooling unit is assisted to improve the cooling rate of the high-temperature gas.

[0023] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present utility model. Description of the Drawings

[0024] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0025] Figure 1 is a schematic structural diagram of the exhaust cooling device and the battery cell according to the embodiment of the present utility model Figure 1 ;

[0026] Figure 2 Structural schematic diagram of the exhaust cooling device and the heat dissipation fins according to an embodiment of the present utility model Figure 1 ;

[0027] Figure 3 Structural schematic diagram of the exhaust cooling device and the battery cell according to an embodiment of the present utility model Figure 2 ;

[0028] Figure 4 Structural schematic diagram of the exhaust cooling device and the heat dissipation fins according to an embodiment of the present utility model Figure 2 ;

[0029] Figure 5 Top view of the exhaust cooling device and the battery cell according to an embodiment of the present utility model;

[0030] Figure 6 is Figure 5 Cross-sectional view A-A in

[0031] Reference numerals:

[0032] 100, exhaust cooling device;

[0033] 10, housing; 11, third exhaust hole;

[0034] 20, exhaust passage; 21, fourth exhaust hole;

[0035] 30, cooling unit; 31, phase change member; 32, diversion cavity;

[0036] 41, baffle;

[0037] 200, battery cell. Detailed implementation manners

[0038] The embodiments of the present utility model will be described in detail below. The embodiments described with reference to the drawings are exemplary. The embodiments of the present utility model will be described in detail below.

[0039] Next, refer to Figures 1-6 Describe the exhaust cooling device 100 according to an embodiment of the present utility model. Further, the present utility model also proposes a battery pack, and further, the present utility model also proposes an electrical equipment.

[0040] Refer to Figures 1-6 As shown, the exhaust cooling device 100 according to an embodiment of the present utility model includes: a housing 10, an exhaust passage 20, and a cooling unit 30.

[0041] The exhaust passage 20 is disposed inside the housing 10. One end of the exhaust passage 20 communicates with the battery cell 200 and the other end communicates with the outside. The cooling unit 30 is disposed inside the housing 10 and wraps around the outer periphery of the exhaust passage 20. Specifically, the housing 10 is disposed on both sides of the battery cell 200. One end of the exhaust passage 20 communicates with the battery cell 200 and the other end communicates with the outside, for discharging the gas generated by the battery cell 200 to the outside. When the gas flows in the exhaust passage 20, the cooling unit 30 wrapping around the outer periphery of the exhaust passage 20 can exchange heat with the exhaust passage 20, controlling the temperature of the battery cell 200 within the normal range and avoiding thermal runaway and affecting the performance of the battery cell 200.

[0042] Moreover, since one end of the exhaust passage 20 communicates with the battery cell 200, the gas discharged from the battery cell 200 can directly enter the exhaust passage 20. When the battery cell 200 undergoes thermal runaway and ejects a high-temperature gas-liquid mixture outward, while the cooling unit 30 absorbs the heat generated by the thermal runaway, it can also cool the high-temperature gas, preventing the spread of thermal runaway or delaying the spread speed of thermal runaway.

[0043] Furthermore, the cooling unit 30 includes a phase change member 31. The phase change member 31 is disposed between the housing 10 and the exhaust passage 20. The phase change member 31 can switch between two phases among the solid phase, liquid phase, and gas phase, and absorbs heat during the phase change. In this way, when the gas generated by the battery cell 200 passes through the exhaust passage 20, it exchanges heat with the exhaust passage 20 and transfers to the phase change member 31 outside the exhaust passage 20. Since the temperature remains unchanged during the phase change of the phase change member 31 and the latent heat of phase change is huge, it can ensure that the heat exchange between the battery cell 200 and the cooling unit 30 occurs at a relatively high rate, timely reducing the temperature of the gas discharged from the battery cell 200 and preventing thermal runaway.

[0044] The phase change member 31 is disposed inside the cooling unit 30 on both sides of the battery cell 200, making full use of the space on both sides of the battery cell 200, which can reduce the overall volume. The phase change members 31 are centrally arranged, and the overall occupied volume is smaller compared to the dispersed arrangement. The saved space can be used to arrange more phase change members 31, improving the cooling performance of the cooling unit 30.

[0045] A third exhaust hole 11 is also provided on the housing 10, and a fourth exhaust hole 21 is provided on the exhaust passage 20. The positions of the third exhaust hole 11 and the fourth exhaust hole 21 correspond to each other. The cooled gas in the exhaust passage 20 is discharged to the outside through the fourth exhaust hole 21 and the third exhaust hole 11, maintaining the pressure balance inside the exhaust passage 20.

[0046] Wherein, the housing 10 can be made of a metal material, and the metal material can enhance the heat exchange rate between the cooling unit 30 and the battery cell 200. It is necessary to spray an insulating material on the surface of the metal material. The housing 10 can also be made of a high-temperature resistant insulating material, which can enhance the safety of the exhaust cooling device 100.

[0047] Thus, by arranging the exhaust cooling device 100 on both sides of the battery cell 200, the gas discharged from the battery cell 200 can directly enter the exhaust passage 20. When the battery cell 200 undergoes thermal runaway and ejects a high-temperature gas-liquid mixture outward, while the cooling unit 30 absorbs the heat generated by the thermal runaway, it can also cool the high-temperature gas, preventing the spread of thermal runaway or delaying the speed of thermal runaway spread. The phase change member 31 is arranged in the cooling unit 30 on both sides of the battery cell 200, making full use of the space on both sides of the battery cell 200 to reduce the overall volume. The phase change members 31 are centrally arranged, and the overall occupied volume is smaller compared to the dispersed arrangement. The saved space can be used to arrange more phase change members 31, improving the cooling performance of the cooling unit 30.

[0048] The phase change member 31 can be one or more of an alkane phase change member, a metal phase change member, a fatty acid phase change member, and a hydrogel phase change member. Among them, the alkane phase change material has a relatively low phase change temperature, is suitable for phase change energy storage in a low-temperature environment, can store and release a large amount of heat during the phase change process, is not easily decomposed or chemically reacted during multiple phase change processes, and has relatively cheap raw materials, low production costs, is harmless to the environment and the human body, and is safe to use.

[0049] The metal phase change material has a high heat transfer efficiency during the phase change process, can withstand large mechanical stresses, is suitable for use in a high-strength environment, the phase change temperature does not change with environmental conditions, and can still maintain its performance after multiple phase changes and is not prone to performance degradation. The fatty acid phase change material is harmless to the human body, can be extracted from animal and vegetable oils, and remains stable during multiple heating and cooling cycles and is not easily degraded. The hydrogel phase change material can absorb a large amount of water, is sensitive to temperature changes, is non-toxic and harmless, and is friendly to the human body.

[0050] Refer to Figures 1-6 As shown, a diversion cavity 32 is provided on the side of the cooling unit 30 facing the battery cell 200. One end of the diversion cavity 32 is arranged opposite to the battery cell 200, and the other end is communicated with the exhaust passage 20. Specifically, one end of the diversion cavity 32 is directly opposite to the position where the battery cell 200 discharges gas and is in contact with the end plate of the battery cell 200. When the battery cell 200 discharges gas, the gas directly enters the exhaust passage 20 through the guidance of the diversion cavity 32. When the battery cell 200 undergoes thermal runaway and ejects a high-temperature gas-liquid mixture outward, the exhaust passage 20 first collects and cools the high-temperature gas-liquid mixture to prevent the spread of thermal runaway or delay the speed of thermal runaway spread.

[0051] The area of the diversion cavity 32 is slightly larger than the position where the battery cell 200 discharges gas, so that all the gas discharged from the battery cell 200 is guided into the diversion cavity 32, preventing the gas generated by the thermal runaway of the battery cell 200 from escaping to the surrounding battery cells 200 and causing a greater range of risks.

[0052] Refer to Figures 1-6As shown, there can be multiple drainage cavities 32 and multiple exhaust channels 20. The multiple drainage cavities 32 and the multiple exhaust channels 20 are arranged in one-to-one correspondence, and the multiple drainage cavities 32 respectively correspond to the multiple battery cells 200 one-to-one. That is, one drainage cavity 32 corresponds to one battery cell 200 and one exhaust channel 20. In this way, the gas discharged from different battery cells 200 can be cooled separately, preventing the spread of thermal runaway.

[0053] Alternatively, there can be only one drainage cavity 32 and one exhaust channel 20, and the drainage cavity 32 corresponds to the multiple battery cells 200. That is, the volumes of the drainage cavity 32 and the exhaust channel 20 are increased, and the gas generated by the multiple battery cells 200 is cooled and discharged through one drainage cavity 32 and one exhaust channel 20. In this way, the rate of heat exchange between the high-temperature gas and the cooling unit 30 is higher, and the temperature of the battery cells 200 can be better maintained stable.

[0054] In addition, the exhaust cooling device 100 further includes: a breathable membrane disposed at the connection between the drainage cavity 32 and the exhaust channel 20, and the breathable membrane selectively conducts the drainage cavity 32 and the exhaust channel 20. When thermal runaway occurs in the battery cell 200, the generated high-temperature gas enters the drainage cavity 32, and the pressure in the drainage cavity 32 rises. After reaching the specified pressure value, the breathable membrane conducts, and the high-temperature gas enters the exhaust channel 20. The phase change member 31 absorbs the heat of the high-temperature gas, and the gas is cooled and discharged to the outside through the third exhaust hole 11 and the fourth exhaust hole 21. By providing the breathable membrane, the sealing performance of the exhaust channel 20 can be improved, preventing the gas entering the exhaust channel 20 from overflowing in the reverse direction and entering the battery cell 200.

[0055] Of course, the breathable membrane can also be made of a heat-melting material. When the temperature in the drainage cavity 32 reaches the specified threshold value, the breathable membrane melts, allowing the high-temperature gas to enter the exhaust channel 20.

[0056] In addition, the breathable membrane also has the function of preventing the phase change material from entering the drainage cavity 32.

[0057] Refer to Figure 4 As shown, the exhaust cooling device 100 further includes: at least one baffle 41, at least one baffle 41 is connected to the housing 10, and the baffle 41 is clamped between two battery cells 200. The baffle 41 is used to guide the gas discharged from the battery cell 200 into the drainage cavity 32, preventing the gas from overflowing in other directions and reducing the installation risk.

[0058] Among them, the baffle 41 can be a heat-conducting baffle, which can dissipate the heat of the high-temperature gas, introduce the gas into the diversion cavity 32, assist the auxiliary cooling unit 30 to cool the high-temperature gas, and improve the gas cooling rate. That is, the baffle 41 is in the same extending direction as the battery cell 200, and the heat away from the gas discharge part of the battery cell 200 can also be transferred to the cooling unit 30 through the baffle 41, which can prevent local overheating of the battery cell 200 and increase the heat dissipation efficiency. Specifically, when the battery cell 200 is operating normally, the baffle 41 transfers the heat generated by the battery cell 200 to the cooling unit 30 to ensure that the battery cell 200 operates within a suitable range. When thermal runaway occurs, it can also delay the rising speed of the temperature of the battery cell 200 and prevent the surrounding battery cells 200 from experiencing thermal runaway due to excessive temperature.

[0059] That is, the baffle 41 can be made of materials with good heat conduction efficiency such as copper plates or aluminum plates.

[0060] In addition, at least one heat dissipation fin is provided on the inner wall of the exhaust passage 20. After adding the heat dissipation fins, the heat exchange surface area of the exhaust passage 20 increases, which can assist the gas discharged from the battery cell 200 to exchange heat with the phase change member 31 and improve the heat exchange efficiency.

[0061] The cooling unit 30 further includes: a framework, the phase change member 31 is wrapped outside the framework, and the framework is a metal framework. The metal framework has good heat conductivity and can quickly conduct the heat absorbed by the phase change member 31 to the outside, maintain the rate of heat absorption of the phase change member 31 from the gas, and improve the stability of the exhaust cooling device 100.

[0062] In addition, metal foam can also be provided in the cooling unit 30, which also has good heat conductivity, can conduct the heat absorbed by the phase change member 31 to the outside, maintain the rate of heat absorption of the phase change member 31 from the gas, and improve the stability of the exhaust cooling device 100.

[0063] According to the battery pack of the second aspect of the present invention, it includes: a package body, a plurality of battery cells 200, and an exhaust cooling device 100.

[0064] A first exhaust hole is provided on the package body, a plurality of battery cells 200 are arranged in the package body, a second exhaust hole is provided on the battery cell 200, the exhaust cooling device 100 is arranged in the package body, and one end of the exhaust passage 20 is communicated with the first exhaust hole and the other end is communicated with the second exhaust hole.

[0065] In addition, a first explosion-proof valve is provided on the package body, the first explosion-proof valve is arranged at the first exhaust hole, a second explosion-proof valve is provided on the battery cell 200, the second explosion-proof valve is arranged at the second exhaust hole, and both ends of the exhaust passage 20 correspond to the first explosion-proof valve and the second explosion-proof valve respectively.

[0066] In this way, the battery cell 200 discharges gas through the second exhaust hole, and the gas directly enters the exhaust passage 20 under the guidance of the diversion cavity 32. The phase change element 31 absorbs heat through phase change to cool the gas. When the battery cell 200 undergoes thermal runaway and ejects a high-temperature gas-liquid mixture outward, the exhaust passage 20 first collects and cools the high-temperature gas-liquid mixture to prevent or delay the spread of thermal runaway. After the cooled gas passes through the fourth exhaust hole 21 and the third exhaust hole 11, it is discharged through the first explosion-proof valve on the second exhaust hole of the package body.

[0067] When the battery pack further includes a liquid-cooled or direct-cooled cold plate, the surface of the cooling unit 30 close to the cold plate can be coated with thermal conductive glue to improve the adaptability of the package body to extreme conditions.

[0068] An electrical device according to an embodiment of the third aspect of the present invention includes a battery pack.

[0069] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0070] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example.

[0071] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. An exhaust cooling device, characterized in that: include: Housing (10); An exhaust channel (20), the exhaust channel (20) being arranged in the housing (10), one end of the exhaust channel (20) being connected to the battery cell (200) and the other end of the exhaust channel (20) being connected to the outside; A cooling unit (30) is arranged in the housing (10) and wrapped around the outer periphery of the exhaust passage (20), and the cooling unit (30) comprises: a phase change element (31), and the phase change element (31) is used to absorb heat during phase change.

2. The exhaust gas cooling device according to claim 1, characterized in that: The phase change element (31) is one or more of an alkane phase change element, a metal phase change element, a fatty acid phase change element, and a hydrogel phase change element.

3. The exhaust gas cooling device according to claim 1, characterized in that: A drainage cavity (32) is provided on one side of the cooling unit (30) facing the battery core (200); one end of the drainage cavity (32) is arranged opposite to the battery core (200) and the other end is connected to the exhaust channel (20).

4. The exhaust gas cooling device according to claim 3, characterized in that: There are a plurality of drainage cavities (32) and a plurality of exhaust channels (20), the plurality of drainage cavities (32) and the plurality of exhaust channels (20) are arranged in a one-to-one correspondence, and the plurality of drainage cavities (32) correspond one-to-one to the plurality of battery cells (200), respectively.

5. The exhaust gas cooling device according to claim 3, characterized in that: The drainage cavity (32) and the exhaust channel (20) are both one, and the drainage cavity (32) corresponds to a plurality of the battery cells (200).

6. The exhaust gas cooling device according to claim 3, characterized in that: Also includes: A breathable membrane is provided at the connection between the drainage cavity (32) and the exhaust passage (20), and the breathable membrane selectively connects the drainage cavity (32) and the exhaust passage (20).

7. The exhaust gas cooling device according to claim 1, characterized in that: Also includes: At least one baffle (41), at least one of the baffles (41) is connected to the housing (10), and the baffle (41) is sandwiched between the two battery cells (200).

8. The exhaust gas cooling device according to claim 7, characterized in that: The baffle (41) is a heat-conducting baffle (41).

9. The exhaust gas cooling device according to claim 1, characterized in that: The inner wall of the exhaust channel (20) is provided with at least one heat dissipation fin.

10. The exhaust gas cooling device according to claim 1, characterized in that: The cooling unit (30) further comprises: a frame, the phase change element (31) is wrapped outside the frame, and the frame is a metal frame.

11. A battery pack, characterized in that: include: A package body, wherein the package body is provided with a first exhaust hole; A plurality of battery cells (200), wherein the plurality of battery cells (200) are arranged in the package, and a second exhaust hole is arranged on the battery cells (200); The exhaust cooling device according to any one of claims 1 to 10, wherein the exhaust cooling device is arranged in the enclosure, and one end of the exhaust channel (20) is connected to the first exhaust hole and the other end is connected to the second exhaust hole.

12. The battery pack according to claim 11, characterized in that: The package body is provided with a first explosion-proof valve, the first explosion-proof valve is arranged at the first exhaust hole, the battery cell (200) is provided with a second explosion-proof valve, the second explosion-proof valve is arranged at the second exhaust hole, and the two ends of the exhaust channel (20) correspond to the first explosion-proof valve and the second explosion-proof valve respectively.

13. An electrical equipment, characterized in that: include: The battery pack according to any one of claims 11 to 12.

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