Battery pack

Abstract

A battery pack, comprising an exhaust cooling assembly and a plurality of battery cells. The exhaust cooling assembly is provided with exhaust flow channels and liquid cooling flow channels which are mutually independent, each battery cell is provided with a first wall attached to the exhaust cooling assembly, the first wall is provided with an explosion-proof valve, and the explosion-proof valve is at least partially opposite to the corresponding exhaust flow channel. The battery cells can be cooled by means of the liquid cooling flow channels, and the possibility of danger caused by overheating of the battery cells is reduced. Hot gas generated by explosion flows to the exhaust flow channels through the explosion-proof valves and is discharged from the battery pack under the guidance of the exhaust flow channels, so that damage in a larger range caused by explosion in the battery pack is avoided, thereby reducing the scope of impact of explosion hazards of the battery cells. The exhaust flow channels and the liquid cooling flow channels are integrally arranged, so that the overall space utilization rate of the battery pack can be improved.

Description

A battery pack

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on September 26, 2023, with application number 202322613018.6 and invention name “A Battery Pack”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of battery technology, and in particular to a battery pack. Background Art

[0003] Currently, market developments indicate that power batteries are becoming increasingly widespread. They are used not only in energy storage systems such as hydropower, thermal, wind, and solar power plants, but also in electric vehicles like electric bicycles, electric motorcycles, and electric vehicles, as well as in military equipment and aerospace. As power battery applications continue to expand, market demand is also growing. However, battery safety has become a major concern in the industry, and improving battery pack safety and mitigating the risk of explosion have become crucial issues. Technical issues

[0004] Based on this, the present application provides a battery pack that reduces the impact range of battery explosion hazards. Technical Solutions

[0005] The technical solution of the present application is: a battery pack, including an exhaust cooling assembly and a plurality of battery cells, the exhaust cooling assembly is provided with mutually independent exhaust flow channels and liquid cooling flow channels, each of the plurality of battery cells is provided with a first wall abutting against the exhaust cooling assembly, the first wall is provided with an explosion-proof valve, and the explosion-proof valve is at least partially opposite to the exhaust flow channel so that the fluid that explodes and flows out through the explosion-proof valve enters the exhaust flow channel.

[0006] Optionally, the battery pack further includes a box body, the box body includes a frame, the frame defines a accommodating cavity, the exhaust cooling assembly and the plurality of battery cells are disposed in the accommodating cavity, and the frame is provided with a first flow channel connected to the exhaust flow channel.

[0007] Optionally, the exhaust cooling assembly is provided with a weak portion, and the weak portion is provided between the exhaust flow channel and the explosion-proof valve.

[0008] Optionally, the plurality of battery cells are arranged along the length direction of the liquid-cooling channel.

[0009] Optionally, the exhaust cooling assembly includes an exhaust cooling body and a partition plate, a cavity is defined in the exhaust cooling body, and the partition plate is disposed in the cavity and divides the cavity into the exhaust flow channel and the liquid cooling flow channel.

[0010] Optionally, the frame includes a first side, a second side, a third side and a fourth side connected in sequence, the first side, the second side, the third side and the fourth side are all provided with the first flow channel, and at least one of the first side, the second side, the third side and the fourth side is provided with a first through hole.

[0011] Optionally, the weak portion is formed by thinning a portion of the exhaust cooling component between the exhaust flow channel and the explosion-proof valve.

[0012] Optionally, the exhaust cooling assembly further includes a cover plate, and part or all of the cover plate forms the weak portion.

[0013] Optionally, the weak portion is made of mica sheet, ceramic rubber, or aerogel material.

[0014] Optionally, there are multiple partition plates and they are spaced apart along the second direction, and the multiple partition plates divide the cavity into at least one exhaust channel and at least two liquid cooling channels, and at least one exhaust channel is provided between at least some adjacent liquid cooling channels.

[0015] Optionally, the exhaust cooling assembly further includes a plug, which is fixed to both ends of the exhaust cooling body along a first direction and seals the cavity; the exhaust cooling body is provided with a liquid inlet and a liquid outlet, and the liquid cooling channel connects the liquid inlet and the liquid outlet.

[0016] Optionally, the exhaust cooling assembly further includes a cover plate, the exhaust cooling body is provided with a third through hole connected to the exhaust flow channel, the cover plate is covered on the third through hole, and the cover plate is arranged opposite to the explosion-proof valve.

[0017] Optionally, the exhaust cooling assembly further includes an insulating layer, which is disposed between the plurality of battery cells and the exhaust cooling assembly, and the insulating layer is provided with a second through hole opposite to the explosion-proof valve.

[0018] Optionally, projections of the plurality of battery cells in a thickness direction thereof are within the insulating layer.

[0019] Optionally, a thermal pad is provided between the exhaust cooling assembly and the plurality of battery cells, and the thermal pad is provided with a fourth through hole opposite to the explosion-proof valve.

[0020] Optionally, projections of the plurality of battery cells in a thickness direction thereof are within the thermal pad.

[0021] Optionally, the box body also includes a first plate and a second plate that are arranged to intersect and are both connected to the frame, the first plate is provided with a slot, and the second plate is snapped into the slot; there are multiple exhaust cooling components, and there is at least one first plate between adjacent exhaust cooling bodies.

[0022] Optionally, the box body also includes a third plate, which is arranged in the accommodating cavity and divides the accommodating cavity into a first space and a second space arranged along a first direction, the multiple battery cells are arranged in the first space, and the second space is used to set the electrical module.

[0023] Optionally, the battery pack further includes a gasket, which is arranged between the exhaust cooling assembly and the frame, the first plate, the second plate and the third plate. Beneficial effects

[0024] The implementation of the embodiments of the present application has the following beneficial effects compared with the prior art:

[0025] The battery pack of the present application, on the one hand, cools the battery cells during normal use through the liquid cooling channel, reducing the possibility of overheating and other hazards. On the other hand, in the event of a battery cell explosion, the explosion-proof valve directs the hot gas generated by the explosion to the exhaust channel, where it is guided out of the battery pack, preventing the explosion from causing wider damage within the battery pack, thereby reducing the scope of the battery cell explosion hazard. Furthermore, integrating the exhaust channel and the liquid cooling channel into the exhaust cooling assembly can also improve the overall space utilization of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] FIG1 is a schematic structural diagram of a battery pack according to an embodiment of the present application.

[0027] FIG2 is an exploded schematic diagram of the exhaust cooling body, insulating layer, battery cell, and thermal pad of the battery pack according to an embodiment of the present application.

[0028] FIG3 is a schematic structural diagram of the exhaust cooling body of the battery pack according to an embodiment of the present application.

[0029] FIG4 is a schematic structural diagram of a first side of a battery pack according to an embodiment of the present application.

[0030] FIG5 is a schematic structural diagram of the first plate of the battery pack according to an embodiment of the present application.

[0031] FIG6 is a schematic structural diagram of the plug, insulating layer, and gasket of the battery pack according to an embodiment of the present application.

[0032] FIG7 is a schematic structural diagram of the connection between the first plate and the second plate according to an embodiment of the present application.

[0033] FIG8 is an exploded schematic diagram of a battery cell, a thermal pad, and an insulating layer exhaust cooling body of a battery pack according to an embodiment of the present application.

[0034] Explanation of the accompanying drawings: 100, battery pack, 1, exhaust cooling assembly, 11, exhaust cooling body, 111, exhaust flow channel, 112, liquid cooling flow channel, 113, weak part, 114, cavity, 115, liquid inlet, 116, liquid outlet, 117, third through hole, 12, partition plate, 13, plug, 14, cover plate, 15, insulation layer, 151, second through hole, 2, battery cell, 21, first wall, 211, explosion-proof valve, 3, box body, 31, frame, 311, first flow channel, 312, first through hole, 31a, first side, 31b, second side, 31c, third side, 31d, fourth side, 32, accommodating chamber, 321, first space, 322, second space, 33, first plate, 331, slot, 34, second plate, 35, third plate, 4. Thermal pad, 41. Fourth through hole, 5. Gasket, X, first direction, Y, second direction. Modes for Carrying Out the Invention

[0035] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0036] In the description of this application, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0037] In addition, the terms "first," "second," etc. are used in this application to describe various types of information, but such information should not be limited to these terms; these terms are merely used to distinguish information of the same type from one another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first information" without departing from the scope of this application.

[0038] In this application, the term "parallel" includes not only the case of absolute parallelism, but also the case of approximate parallelism conventionally recognized in engineering, such as "parallel" refers to the state where the angle formed by a straight line, a straight line and a plane, or a plane and a plane is -1° to 1°; at the same time, "perpendicular" also includes not only the case of absolute perpendicularity, but also the case of approximate perpendicularity conventionally recognized in engineering, such as "perpendicular" refers to the state where the angle formed by a straight line, a straight line and a plane, or a plane and a plane is 89° to 91°. Equal distances or equal angles include not only the case of absolute equality, but also the case of approximate equality conventionally recognized in engineering, which means that there may be a certain error, such as the state with a tolerance range of -1% to 1%.

[0039] Example 1:

[0040] Referring to Figures 1 to 3 and 8, this embodiment provides a battery pack 100 comprising an exhaust cooling assembly 1 and a plurality of battery cells 2. The exhaust cooling assembly 1 is provided with independent exhaust channels 111 and liquid cooling channels 112. The exhaust channels 111 and liquid cooling channels 112 may be adjacent or non-adjacent cavities. The liquid cooling channels 112 and the exhaust channels 111 may extend in parallel, and the plurality of battery cells 2 may be arranged along the length of the liquid cooling channels 112. The battery cells 2 are provided with a first wall 21 that abuts the exhaust cooling assembly 1. The first wall 21 is provided with an explosion-proof valve 211, and the explosion-proof valve 211 is at least partially opposed to the exhaust channel 111 so that fluid flowing out of the explosion-proof valve 211 can enter the exhaust channel 111. The liquid cooling channels 112 can cool the battery cells 2, reducing the possibility of overheating and other hazards. On the other hand, if a battery cell 2 catches fire, the fluid flowing out of the explosion-proof valve 211 flows toward the exhaust duct 111 and, guided by the exhaust duct 111, is discharged from the battery pack 100, preventing the temperature of other battery cells 2 in the battery pack 100 from rising. This slows the spread of heat, thereby reducing the scope of the battery cell 2 explosion hazard and improving the thermal safety of the battery pack 100. Furthermore, integrating the exhaust duct 111 and the liquid cooling duct 112 into the exhaust cooling assembly 1 also improves the overall space utilization of the battery pack.

[0041] Preferably, referring to Figures 1 and 4, in this embodiment, the battery pack 100 further includes a housing 3, which includes a frame 31. The frame 31 defines a housing 32. The exhaust cooling assembly 1 and multiple battery cells 2 are both disposed within the housing 32. The frame 31 defines a first flow channel 311 that communicates with the exhaust flow channel 111. When a battery cell 2 explodes, the velocity of the hot air flow gradually decreases as it flows through the exhaust flow channel 111 and the first flow channel 311. Guided by the exhaust flow channel 111 and the first flow channel 311, the hot air flow transfers the destructive force toward the housing 3, thereby effectively reducing damage to the interior of the battery pack 100. Specifically, in this embodiment, the housing 3 is equipped with an explosion-proof valve that communicates with the first flow channel 311. The hot air flows through the first flow channel 311 toward the explosion-proof valve and is discharged by the explosion-proof valve, further reducing the damage to the battery pack 100 caused by the explosion.

[0042] Preferably, referring to Figures 1 to 6 , in this embodiment, the exhaust cooling assembly 1 is provided with a weakened portion 113, which is located between the exhaust flow channel 111 and the explosion-proof valve 211. If a battery cell 2 explodes, the resulting hot air flow rushes out of the weakened portion 113 and into the explosion-proof valve 211, thereby preventing the hot air flow in the exhaust flow channel 111 from affecting other battery cells 2. Specifically, in this embodiment, the weakened portion 113 is formed by thinning the portion of the exhaust cooling assembly 1 between the exhaust flow channel 111 and the explosion-proof valve 211.

[0043] Preferably, referring to FIG3 , in this embodiment, the exhaust cooling assembly 1 includes an exhaust cooling body 11 and a partition plate 12 . A cavity 114 is defined within the exhaust cooling body 11. The partition plate 12 is disposed within the cavity 114 and divides the cavity 114 into an exhaust flow channel 111 and a liquid cooling flow channel 112 . The partition plate 12 prevents coolant from flowing from the liquid cooling flow channel 112 into the exhaust flow channel 111 and then into the battery cells. Furthermore, the partition plate 12 also provides heat conduction, utilizing the coolant within the liquid cooling flow channel 112 to cool the gas within the exhaust flow channel 111, thereby rapidly reducing the risk of a fire in the battery cells 2.

[0044] Preferably, referring to FIG. 3 , in this embodiment, multiple partition plates 12 are provided and spaced apart along the second direction Y. The multiple partition plates 12 divide the cavity 114 into at least one exhaust channel 111 and at least two liquid-cooling channels 112, and at least one exhaust channel 111 is provided between at least some adjacent liquid-cooling channels 112. In the event of an explosion in a battery cell 2, the hot air flowing along the exhaust channel 111 is cooled by the coolant in the liquid-cooling channel 112 on both sides of the partition plates 12, further reducing the destructive potential of the hot air flow.

[0045] Preferably, referring to FIG6 , in this embodiment, the exhaust cooling assembly 1 further includes a plug 13 , which is fixed to both ends of the exhaust cooling body 11 along a first direction X. The exhaust cooling body 11 is provided with a liquid inlet 115 and a liquid outlet 116 , and a liquid cooling channel 112 connects the liquid inlet 115 and the liquid outlet 116 . The plug 13 can be used to both limit the position of the exhaust cooling body 11 and seal both ends of the exhaust cooling body 11 to reduce the overflow of hot air. Specifically, in this embodiment, the first direction X is the same as the length direction of the exhaust cooling body 11, the second direction Y is the same as the width direction of the exhaust cooling body 11, and the first direction X and the second direction Y are perpendicular to each other.

[0046] Preferably, referring to Figure 2 , in this embodiment, the exhaust cooling assembly 1 further includes an insulating layer 15 , which is disposed between the battery cell 2 and the exhaust cooling assembly 1 . The insulating layer 15 defines a second through-hole 151 opposite the explosion-proof valve 211 . Specifically, in this embodiment, the projection of the battery cell 2 in its thickness direction is within the insulating layer 15 , so that the insulating layer 15 covers the entire battery cell 2 , preventing direct contact between the battery cell 2 and the exhaust cooling assembly 1 from generating an arc. Fluid that ruptures the battery cell 2 through the explosion-proof valve 211 can be discharged through the second through-hole 151 .

[0047] Preferably, referring to Figures 2 and 8 , in this embodiment, a thermal pad 4 is disposed between the exhaust cooling assembly 1 and the battery cell 2. The thermal pad 4 defines a fourth through-hole 41 opposite the explosion-proof valve 211. Specifically, in this embodiment, the thickness projection of the battery cell 2 extends within the thermal pad 4, allowing the thermal pad 4 to cover the entire battery cell 2. The thermal pad 4 not only assists in temperature regulation of the battery cell 2 but also serves as a buffer. Fluid released from the battery cell 2 after it explodes through the explosion-proof valve 211 can be discharged through the fourth through-hole 41.

[0048] Preferably, referring to Figures 1 and 7 , in this embodiment, the housing 3 further includes a first plate 33 and a second plate 34 intersecting and connected to the frame 31. The first plate 33 defines a slot 331, into which the second plate 34 engages. The exhaust cooling assembly 1 includes multiple first plates 33, with at least one first plate 33 positioned between adjacent exhaust cooling bodies 11. The second plate 34 positions the first plate 33, and the first and second plates 33 and 34 form a storage space, which improves the modality of the battery cells 2 and thereby enhances the safety of the battery cells 2.

[0049] Preferably, referring to FIG1 , in this embodiment, the housing 3 further includes a third plate 35 , which is disposed in the accommodating cavity 32 and divides the accommodating cavity 32 into a first space 321 and a second space 322 arranged along the first direction X. A plurality of battery cells 2 are disposed in the first space 321 , and the second space 322 is used to accommodate an electrical module, which may be a battery management system or a high-voltage circuit breaker module. The high-voltage circuit breaker module may include a relay, a current sensor, and the like. The input end of the electrical module is connected to the plurality of battery cells 2 , and the output end is connected to an electrical appliance, thereby outputting power from the plurality of battery cells 2 to the appliance. The electrical module and the plurality of battery cells 2 are disposed in the second space 322 and the first space 321 , respectively. In the event of a fault, only the space where the fault occurs needs to be repaired or replaced, thereby improving the convenience of repair and maintenance.

[0050] Preferably, referring to Figure 6 , in this embodiment, the battery pack 100 further includes a gasket 5 . The gasket 5 is provided between the exhaust cooling assembly 1 and the frame 31 , between the exhaust cooling assembly 1 and the first plate 33 , between the exhaust cooling assembly 1 and the second plate 34 , and between the exhaust cooling assembly 1 and the third plate 35 . The presence of the gasket 5 creates a certain amount of space between the battery cells 2 and the exhaust cooling assembly 1 , preventing the battery cells 2 from being squeezed and causing a short circuit. It also increases the torque of the bolts connecting the exhaust cooling assembly 1 to the frame 31 , the first plate 33 , the second plate 34 , and the third plate 35 .

[0051] Preferably, referring to FIG. 1 , in this embodiment, the frame 31 includes a first side 31a, a second side 31b, a third side 31c, and a fourth side 31d, each of which is connected in sequence. A first flow channel 311 is defined in each of the first side 31a, the second side 31b, the third side 31c, and the fourth side 31d. The first side 31a, the second side 31b, the third side 31c, and the fourth side 31d are each defined by a first through hole 312. Hot air flows from the exhaust flow channel 111 and the weak portion 113 into the first flow channel 311, and then into the frame 31 from the first flow channel 311. Hot air flows along the first side 31a, the second side 31b, the third side 31c, and the fourth side 31d to be sufficiently cooled before being exhausted from the first through hole 312. This substantially reduces the velocity of the hot air flow, thereby preventing damage caused by excessive hot air velocity when exhausted through the first through hole 312.

[0052] Example 2:

[0053] Preferably, the weak portion 113 can also be formed in other forms. In this embodiment, the exhaust cooling assembly 1 also includes a cover plate 14, and part or all of the cover plate 14 forms the weak portion 113. The exhaust cooling body 11 is provided with a third through hole 117 connected to the exhaust flow channel 111. The cover plate 14 covers the third through hole 117, and the cover plate 14 is arranged opposite to the explosion-proof valve 211, so that the material of the weak portion 113 can be different from that of the exhaust cooling body 11. Mica sheets, ceramic rubber, aerogel and other materials with various fire-resistant properties can be used to make the weak portion 113 during the production process to improve the safety of the battery pack 100.

[0054] Example 3:

[0055] Preferably, the number and position of the first through holes 312 can be varied. In this embodiment, at least one of the first side 31a, the second side 31b, the third side 31c, and the fourth side 31d is provided with a first through hole 312. This allows the thermal energy to be released quickly from the first through holes 312 on the adjacent sides, thereby reducing the possibility of damaging the frame 31.

[0056] It should be noted that, as long as no conflict is constituted, the various embodiments in this application and the various features in each embodiment can be combined with each other, and the technical solutions formed are all within the protection scope of this application.

[0057] The battery pack 100 of this embodiment has the following beneficial effects:

[0058] First, during normal use, the liquid cooling channel 112 cools the battery cells 2, reducing the possibility of overheating and other hazards. Secondly, if a battery cell 2 explodes, the explosion-proof valve directs the hot gas generated by the explosion to the exhaust channel 111, where it is guided out of the battery pack 100. This prevents the explosion from causing wider damage within the battery pack 100, thereby reducing the scope of the explosion hazard.

[0059] 2. When the battery cell 2 explodes, the hot air flow gradually decreases in speed while flowing in the exhaust flow channel 111 and the first flow channel 311, and the destructive force is transferred to the box body 3 under the guidance of the exhaust flow channel 111 and the first flow channel 311, thereby effectively reducing the destructiveness to the interior of the battery pack 100.

[0060] 3. When the battery cell 2 explodes, the hot air flowing along the exhaust channel 111 is cooled by the coolant in the liquid cooling channel 112 through the partition plate 12 on both sides, further reducing the destructiveness of the hot air flow.

[0061] The above is a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications are also considered to be within the scope of protection of the present application.

Claims

1. A battery pack, comprising an exhaust cooling assembly (1) and a plurality of battery cells (2), wherein the exhaust cooling assembly (1) is provided with mutually independent exhaust flow channels (111) and liquid cooling flow channels (112), each of the plurality of battery cells (2) is provided with a first wall (21) abutting against the exhaust cooling assembly (1), the first wall (21) is provided with an explosion-proof valve (211), and the explosion-proof valve (211) is at least partially opposite to the exhaust flow channel (111) so that fluid that explodes and flows out through the explosion-proof valve (211) enters the exhaust flow channel (111).

2. The battery pack according to claim 1, wherein: The battery pack further comprises a box body (3), the box body (3) comprising a frame (31), the frame (31) defining a receiving cavity (32), the exhaust cooling assembly (1) and the plurality of battery cells (2) being arranged in the receiving cavity (32), and the frame (31) being provided with a first flow channel (311) communicating with the exhaust flow channel (111).

3. The battery pack according to claim 1, wherein: The exhaust cooling assembly (1) is provided with a weak portion (113), and the weak portion (113) is provided between the exhaust flow channel (111) and the explosion-proof valve (211).

4. The battery pack according to claim 1, wherein: The plurality of battery cells (2) are arranged along the length direction of the liquid cooling channel (112).

5. The battery pack according to claim 2, wherein: The exhaust cooling assembly (1) comprises an exhaust cooling body (11) and a partition plate (12), wherein a cavity (114) is provided in the exhaust cooling body (11), and the partition plate (12) is arranged in the cavity (114) and divides the cavity (114) into the exhaust flow channel (111) and the liquid cooling flow channel (112).

6. The battery pack according to claim 2, wherein: The frame (31) comprises a first side (31a), a second side (31b), a third side (31c) and a fourth side (31d) which are connected in sequence; the first side (31a), the second side (31b), the third side (31c) and the fourth side (31d) are all provided with the first flow channel (311); and at least one of the first side (31a), the second side (31b), the third side (31c) and the fourth side (31d) is provided with a first through hole (312).

7. The battery pack according to claim 3, wherein: The weak portion (113) is made by thinning a portion of the exhaust cooling assembly (1) between the exhaust flow channel (111) and the explosion-proof valve (211).

8. The battery pack according to claim 3, wherein: The exhaust cooling assembly (1) further comprises a cover plate (14), a part or the whole of which forms the weak portion (113).

9. The battery pack according to claim 3, wherein: The weak portion (113) is made of mica sheet, ceramic rubber, or aerogel material.

10. The battery pack according to claim 5, wherein: The partition plates (12) are provided in plurality and are arranged at intervals along the second direction (Y); the plurality of partition plates (12) divide the cavity (114) into at least one exhaust flow channel (111) and at least two liquid cooling flow channels (112); and at least one exhaust flow channel (111) is provided between at least some of the adjacent liquid cooling flow channels (112).

11. The battery pack according to claim 5, wherein: The exhaust cooling assembly (1) further comprises a plug (13), wherein the plug (13) is fixed to both ends of the exhaust cooling body (11) along a first direction (X) and seals the cavity (114), the exhaust cooling body (11) is provided with a liquid inlet (115) and a liquid outlet (116), and the liquid cooling channel (112) is connected to the liquid inlet (115) and the liquid outlet (116).

12. The battery pack according to claim 5, wherein: The exhaust cooling assembly (1) further comprises a cover plate (14); the exhaust cooling body (11) is provided with a third through hole (117) connected to the exhaust flow channel (111); the cover plate (14) covers the third through hole (117), and the cover plate (14) is arranged opposite to the explosion-proof valve (211).

13. The battery pack according to claim 1, wherein: The exhaust cooling assembly (1) further comprises an insulating layer (15), wherein the insulating layer (15) is arranged between the plurality of battery cells (2) and the exhaust cooling assembly (1), and the insulating layer (15) is provided with a second through hole (151) opposite to the explosion-proof valve (211).

14. The battery pack according to claim 13, wherein: The projections of the plurality of battery cells (2) in the thickness direction thereof are within the insulating layer (15).

15. The battery pack according to claim 1 or 13, wherein: A heat-conducting pad (4) is provided between the exhaust cooling assembly (1) and the plurality of battery cells (2), and the heat-conducting pad (4) is provided with a fourth through hole (41) opposite to the explosion-proof valve (211).

16. The battery pack according to claim 15, wherein: The projections of the plurality of battery cells (2) in the thickness direction thereof are within the thermal conductive pad (4).

17. The battery pack according to claim 5, wherein: The box body (3) further comprises a first plate member (33) and a second plate member (34) which are arranged to intersect and are both connected to the frame (31); the first plate member (33) is provided with a slot (331), and the second plate member (34) is snapped into the slot (331); the exhaust cooling assembly (1) has a plurality of them, and there is at least one first plate member (33) between adjacent exhaust cooling bodies (11).

18. The battery pack according to claim 2, wherein: The box body (3) further comprises a third plate (35), wherein the third plate (35) is arranged in the accommodating cavity (32) and divides the accommodating cavity (32) into a first space (321) and a second space (322) arranged along a first direction (X); the plurality of battery cells (2) are arranged in the first space (321), and the second space (322) is used for accommodating an electrical module.

19. The battery pack according to claim 18, wherein: The battery pack further comprises a gasket (5), wherein the gasket (5) is arranged between the exhaust cooling assembly (1) and the frame (31), the first plate (33), the second plate (34) and the third plate (35).

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