Battery pack

Abstract

The utility model discloses a battery pack. A battery pack comprises a box body, a battery module and a connecting assembly. A flow guide channel is formed in the side wall of the box body. The battery module is arranged in the box body. A first accommodating cavity is formed in the battery module; the first accommodating cavity is used for accommodating a battery cell; the connecting assembly is of a hollow structure. One end of the connecting assembly communicates with the flow guide channel, and the other end communicates with the first containing cavity. And a discharge hole is formed in the side wall of the box body. The discharge hole communicates with the flow guide channel. And gas in the first accommodating cavity can be discharged to the outside through the connecting assembly, the flow guide channel and the discharge hole in sequence. When thermal runaway occurs, high-temperature gas and flames generated by thermal diffusion can be directionally discharged to the outside along the first accommodating cavity, the connecting assembly, the flow guide channel and the discharge hole, so that disordered spreading of the thermal diffusion and the flames in the battery pack is avoided, the safety of the battery pack is remarkably improved, and the possibility of thermal runaway of the whole battery pack is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery equipment, in particular to a battery pack. Background Art

[0002] During the use of the battery pack, when one of the batteries experiences thermal runaway, it will cause the temperature of other normal batteries to rise rapidly and fail to work normally, eventually triggering all the remaining batteries to catch fire.

[0003] In the related art, thermal insulation material is typically placed between adjacent battery cells to reduce heat conduction between them. However, heat accumulates within the battery module and can still spread to surrounding cells, affecting other healthy cells. The heat diffusion and flame spread generated during thermal runaway of the battery module cannot be directed away, potentially causing thermal runaway of the entire battery pack and compromising its safety. Utility Model Content

[0004] The main purpose of the present utility model is to provide a battery pack, which aims to solve the technical problem that the heat diffusion and flame spread generated when the battery module is in thermal runaway cannot be discharged in a direction, which may cause the entire battery pack to be in thermal runaway and reduce the safety of the battery pack.

[0005] In order to achieve the above-mentioned purpose of the utility model, the present utility model provides a battery pack.

[0006] A battery pack, comprising:

[0007] A box body, wherein a flow guide channel is opened in the side wall of the box body;

[0008] A battery module, the battery module is disposed in the box, and a first accommodating cavity is provided in the battery module, the first accommodating cavity is used to accommodate a battery cell; and

[0009] A connecting component having a hollow structure, one end of the connecting component being connected to the guide channel, and the other end being connected to the first accommodating chamber; a discharge hole being provided on the side wall of the box body, the discharge hole being connected to the guide channel, and the gas in the first accommodating chamber can be discharged to the outside through the connecting component, the guide channel and the discharge hole in sequence.

[0010] In one embodiment, the side wall of the box body includes a crossbeam and multiple longitudinal beams, one end of the multiple longitudinal beams is spaced apart from the crossbeam, a first channel is opened in the longitudinal beam, the multiple first channels are connected to one end of the connecting component, a second channel is opened in the crossbeam, the second channel is connected to the multiple first channels, and the discharge hole is opened.

[0011] In one embodiment, the battery pack includes a first liquid cooling plate and a second liquid cooling plate, the first liquid cooling plate is arranged at the top of the battery module, and the second liquid cooling plate is arranged at the bottom of the battery module, the first liquid cooling plate, the second liquid cooling plate and the side wall of the box body enclose a second accommodating cavity, and the second accommodating cavity is used to accommodate multiple battery modules.

[0012] In one embodiment, the battery pack includes a fastener, the first liquid cooling plate is provided with a first mounting hole, the top of the battery module is provided with a second mounting hole, and the fastener is passed through the first mounting hole and the second mounting hole.

[0013] In one embodiment, the battery pack includes a first explosion-proof valve, which is arranged on the outer wall of the battery module and is connected to the first accommodating chamber. One end of the first explosion-proof valve away from the outer wall of the battery module is connected to the connecting assembly. When the air pressure in the first accommodating chamber is greater than a first threshold value, the first explosion-proof valve opens to allow the gas in the first accommodating chamber to enter the connecting assembly and the guide channel.

[0014] In one embodiment, the connecting assembly includes a clamp and a first connecting member, the first connecting member is arranged on the inner side wall of the box facing the battery module, the inner side wall of the clamp is provided with a groove, the end of the first explosion-proof valve away from the battery module is provided with a first clamp ring adapted to the groove, the end of the first connecting member away from the inner side wall of the box is provided with a second clamp ring adapted to the groove, and the first clamp ring and the second clamp ring are both arranged in the groove.

[0015] In one embodiment, the groove is an annular groove, a sealing ring is attached to the groove, and the sealing ring is located on the peripheral side wall of the connection between the first explosion-proof valve and the first connecting member.

[0016] In one embodiment, the connecting assembly includes a second connecting member and a third connecting member, one end of the second connecting member is connected to the first explosion-proof valve, and the other end is connected to the third connecting member, the end of the third connecting member away from the second connecting member is connected to the inner wall of the box body, and the second connecting member and the third connecting member are arranged at an angle.

[0017] In one embodiment, the third connecting member is arranged in a vertical direction.

[0018] In one embodiment, the battery pack includes a second explosion-proof valve, which is arranged on the hole wall of the discharge hole. When the air pressure in the guide channel is greater than a second threshold value, the second explosion-proof valve opens to allow the gas in the guide channel to be discharged to the outside.

[0019] Beneficial effects:

[0020] The battery pack of the present invention comprises a first accommodating cavity within the battery module. The first accommodating cavity is used to accommodate battery cells. A flow channel is defined within the sidewall of the housing. The connecting assembly is a hollow structure, one end of which communicates with the flow channel and the other end with the first accommodating cavity. A drain hole is provided in the sidewall of the housing, connecting to the flow channel.

[0021] When thermal runaway occurs in one of the battery cells in the first accommodating cavity, the heat will diffuse into the first accommodating cavity. The heat in the first cavity can enter the guide channel through the connecting assembly in the form of gas, and finally be discharged to the outside through the discharge hole, thereby avoiding the accumulation of heat in the battery module, thereby greatly reducing the risk of thermal runaway spreading to the surrounding battery cells. That is, the guide channel provides a clear discharge path for heat diffusion and flames. When thermal runaway occurs, the high-temperature gas and flames generated by thermal diffusion can be discharged to the outside in a direction along the first accommodating cavity, the connecting assembly, the guide channel and the discharge hole, thereby avoiding the disorderly spread of heat diffusion and flames inside the battery pack, thereby significantly improving the safety of the battery pack and reducing the possibility of thermal runaway of the entire battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a top view of a battery pack according to an embodiment of the present invention.

[0023] Figure 2 This is an exploded view of a battery pack according to an embodiment of the present invention.

[0024] Figure 3 It is a structural diagram of a battery module and a box body according to an embodiment of the present invention.

[0025] Figure 4 It is a structural schematic diagram of a battery module and a first liquid cooling plate according to an embodiment of the present invention.

[0026] Figure 5 It is a structural diagram of a connection assembly according to an embodiment of the present invention.

[0027] Figure 6 yes Figure 5 Cross-sectional view along AA.

[0028] Figure 7 It is a structural schematic diagram of a clamp according to an embodiment of the present utility model.

[0029] Figure 8 It is a structural schematic diagram of the first connecting member of an embodiment of the present utility model.

[0030] Figure 9 It is a structural schematic diagram of a first explosion-proof valve in one embodiment of the utility model.

[0031] Figure 10 It is a top view of a battery pack according to another embodiment of the present invention.

[0032] Figure 11 It is an exploded view of a battery pack according to another embodiment of the present invention.

[0033] Figure 12 yes Figure 10 Cross-sectional view along BB.

[0034] Figure 13 It is a structural schematic diagram of a connection assembly according to another embodiment of the present invention.

[0035] Figure 14 It is a side view of a connection assembly according to another embodiment of the present invention.

[0036] Figure 15 yes Figure 14 Cross-sectional view along DD direction.

[0037] Figure 16 yes Figure 12 Enlarged view of point C in the middle.

[0038] in:

[0039] 100, box body; 110, diversion channel; 120, discharge hole; 130, crossbeam; 140, longitudinal beam;

[0040] 200, battery module; 210, first accommodating cavity;

[0041] 300, connecting assembly; 310, clamp; 311, groove; 320, first connecting member; 321, second clamp ring; 330, sealing ring; 340, second connecting member; 350, third connecting member;

[0042] 410, first liquid cooling plate; 411, fastener; 420, second liquid cooling plate;

[0043] 500, first explosion-proof valve; 510, first clamp ring;

[0044] 600. Second explosion-proof valve.

[0045] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0046] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0047] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like, indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0048] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections, direct connections, or indirect connections through an intermediate medium; they may refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0049] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0050] like Figures 1 to 3As shown, in some embodiments, a battery pack includes a case 100, a battery module 200 and a connecting assembly 300. A guide channel 110 is provided in the side wall of the case 100. The battery module 200 is arranged in the case 100. A first accommodating chamber 210 is provided in the battery module 200. The first accommodating chamber 210 is used to accommodate battery cells. The connecting assembly 300 is a hollow structure. One end of the connecting assembly 300 is connected to the guide channel 110, and the other end is connected to the first accommodating chamber 210. A discharge hole 120 is provided on the side wall of the case 100. The discharge hole 120 is connected to the guide channel 110. The gas in the first accommodating chamber 210 can be discharged to the outside through the connecting assembly 300, the guide channel 110 and the discharge hole 120 in sequence.

[0051] When thermal runaway occurs in one of the battery cells within the first accommodating chamber 210, heat diffuses into the first accommodating chamber 210. Heat within the first chamber can then enter the flow channel 110 in the form of gas through the connector assembly 300 and ultimately be discharged to the outside through the exhaust port 120. This prevents heat accumulation within the battery module 200, significantly reducing the risk of thermal runaway spreading to surrounding cells. In other words, the flow channel 110 provides a clear path for heat diffusion and flames to escape. This flow channel 110 provides a directional exhaust and thermal runaway diversion design for the battery pack. When thermal runaway occurs, the resulting heat expansion and flame spread are directed outward, effectively discharging the heat outside the battery pack. When thermal runaway occurs, the high-temperature gases and flames generated by this thermal diffusion are directed outward along the first accommodating chamber 210, connector assembly 300, flow channel 110, and exhaust port 120, preventing the disorderly spread of heat diffusion and flames within the battery pack. This significantly improves the safety of the battery pack and reduces the possibility of thermal runaway within the entire battery pack.

[0052] In some embodiments, the sidewalls of the housing 100 include a crossbeam 130 and multiple longitudinal beams 140. One end of each longitudinal beam 140 is spaced apart from the crossbeam 130. A first channel is defined within the longitudinal beam 140. The multiple first channels communicate with one end of the connection assembly 300. A second channel is defined within the crossbeam 130. The second channel communicates with the multiple first channels and defines a drain hole 120.

[0053] It should be noted that the crossbeam 130 and the multiple longitudinal beams 140 form a frame structure, which can enhance the overall strength and stability of the box 100. The crossbeam 130 serves as a lateral support, and one end of the longitudinal beam 140 is spaced apart on the crossbeam 130, forming a relatively stable support system that can effectively resist external impact and pressure and protect the internal battery module 200. In addition, the first channel in the longitudinal beam 140 and the second channel in the crossbeam 130 are interconnected, together forming a guide channel 110. When the battery cell in the battery module 200 undergoes thermal runaway, the high-temperature gas generated can enter the first channel of the longitudinal beam 140 through the connecting assembly 300, and the heat of the multiple first channels is then concentrated in the second channel of the crossbeam 130, and finally discharged to the outside through the discharge hole 120. This design ensures that the thermal runaway gas can be discharged in an orderly manner, avoids the gas from running around inside the box 100, and thus reduces the impact of thermal runaway on the entire battery pack.

[0054] Specifically, a plurality of battery modules 200 are provided. The plurality of battery modules 200 are laid out in the housing.

[0055] Specifically, a plurality of connection assemblies 300 are provided, and the plurality of connection assemblies 300 are arranged in a one-to-one correspondence with the plurality of battery modules 200 , so that heat in the plurality of battery modules 200 enters the first channels of the plurality of longitudinal beams 140 through the plurality of connection assemblies 300 .

[0056] More specifically, three longitudinal beams 140 may be provided. Two rows of battery modules 200 are provided between each two longitudinal beams 140. Three longitudinal beams 140 correspond to four rows of battery modules 200. Heat within each row of battery modules 200 is directionally discharged into the first channel of the side longitudinal beam 140.

[0057] like Figure 1 As shown, in some embodiments, the battery pack includes a first liquid cooling plate 410 and a second liquid cooling plate 420. The first liquid cooling plate 410 is disposed on top of the battery module 200. The second liquid cooling plate 420 is disposed on the bottom of the battery module 200. The first and second liquid cooling plates 410, 420, and the sidewalls of the housing 100 enclose a second accommodating chamber for accommodating multiple battery modules 200.

[0058] It should be noted that during battery operation, the first and second liquid cooling plates 410, 420, and the sidewalls of the housing 100 combine to form a closed thermal management space, which helps improve heat exchange efficiency. The cooling plates can quickly remove heat generated by the battery module 200 through the internally circulating coolant, keeping the battery module 200 within a suitable operating temperature range. This upper and lower dual liquid cooling plate design can more evenly control the temperature of the battery module 200, improving battery performance and lifespan.

[0059] The first liquid cooling plate 410 and the second liquid cooling plate 420 are in large-area contact with the battery module 200, thereby effectively improving the heat dissipation capacity of the battery cell, thereby improving the fast charging capacity of the battery cell, and effectively improving the fast charging capacity of the battery system to 8C or even higher.

[0060] In related technologies, most liquid cooling plates on the top surface of battery modules are stamped. Stamped liquid cooling plates are relatively thin, and traditional installation methods lack mounting points on the top surface of the battery module. This results in an inadequate fit between the top surface of the battery module and the liquid cooling plate, affecting the cooling effect of the liquid cooling plate.

[0061] like Figure 4 As shown, in some embodiments, the battery pack includes a fastener 411. The first liquid cooling plate 410 is provided with a first mounting hole. The top of the battery module 200 is provided with a second mounting hole. The fastener 411 is passed through the first mounting hole and the second mounting hole to fix the first liquid cooling plate 410 to the top of the battery module 200, so that the first liquid cooling plate 410 is more closely fitted to the surface of the top of the battery module 200, thereby improving the thermal management efficiency of the first liquid cooling plate 410 and the battery module 200. Specifically, the fastener 411 can be a buckle. The first liquid cooling plate 410 and the battery module 200 are connected by a buckle.

[0062] like Figure 2 As shown, in some embodiments, the battery pack includes a first explosion-proof valve 500. The first explosion-proof valve 500 is disposed on the outer wall of the battery module 200 and communicates with the first accommodating chamber 210. One end of the first explosion-proof valve 500, away from the outer wall of the battery module 200, is connected to the connecting assembly 300. When the air pressure in the first accommodating chamber 210 exceeds a first threshold, the first explosion-proof valve 500 opens, allowing the gas in the first accommodating chamber 210 to enter the connecting assembly 300 and the diversion channel 110.

[0063] It should be noted that when the battery module 200 is operating normally and the air pressure in the first accommodating chamber 210 is within a normal range, the explosion-proof valve remains closed to ensure the sealing and stability of the battery module 200. When thermal runaway occurs in the battery cells of the battery module 200 and the air pressure in the first accommodating chamber 210 exceeds a first threshold, the first explosion-proof valve 500 opens, and the heat in the first chamber can enter the guide channel 110 through the connecting assembly 300 in the form of gas, and is ultimately discharged to the outside through the discharge hole 120, thereby preventing heat accumulation in the battery module 200 and reducing the air pressure in the first accommodating chamber 210 so that the air pressure in the first accommodating chamber 210 is within a normal range.

[0064] Specifically, the first explosion-proof valve 500 can adopt a multi-layer structure. The outer layer is made of a solid metal material to provide mechanical strength and protection. The inner layer is made of a high-temperature and corrosion-resistant sealing material to ensure sealing under normal conditions.

[0065] A pressure-sensitive element, such as a spring-loaded valve or pressure diaphragm, can be installed at the opening portion of the first explosion-proof valve 500. When the air pressure in the first accommodating chamber 210 reaches a first threshold, the pressure-sensitive element can respond quickly and accurately control the opening degree of the valve to adapt to varying degrees of air pressure changes.

[0066] In other embodiments, the first explosion-proof valve 500 may also be replaced by an exhaust valve.

[0067] like Figure 1 As shown, in some embodiments, the battery pack includes a second explosion-proof valve 600. The second explosion-proof valve 600 is disposed on the wall of the discharge hole 120. When the air pressure in the diversion channel 110 exceeds a second threshold, the second explosion-proof valve 600 opens to allow the gas in the diversion channel 110 to be discharged to the outside.

[0068] It should be noted that when the air pressure in the flow channel 110 exceeds the second threshold, the second explosion-proof valve 600 opens, promptly discharging the heat and gas in the flow channel 110 to the outside. The dual explosion-proof valve design of the first explosion-proof valve 500 and the second explosion-proof valve 600 provides multiple safety measures for the battery pack, greatly improving its safety.

[0069] Specifically, the discharge hole 120 and the second explosion-proof valve 600 may be provided on the beam 130 .

[0070] Specifically, a plurality of discharge holes 120 , a plurality of second explosion-proof valves 600 , and a plurality of explosion-proof valves may be arranged at intervals on the beam 130 .

[0071] In other embodiments, the second explosion-proof valve 600 may also be replaced by an exhaust valve.

[0072] like Figures 5 to 9 As shown, in some embodiments, the connection assembly 300 includes a clamp 310 and a first connector 320. The first connector 320 is disposed on the inner sidewall of the housing 100 facing the battery module 200. A groove 311 is defined on the inner sidewall of the clamp 310. A first clamp ring 510 that fits in the groove 311 is disposed on the end of the first explosion-proof valve 500 away from the battery module 200. A second clamp ring 321 that fits in the groove 311 is disposed on the end of the first connector 320 away from the inner sidewall of the housing 100. Both the first clamp ring 510 and the second clamp ring 321 are disposed in the groove 311.

[0073] It should be noted that the first clamp ring 510, the second clamp ring 321, the clamp 310, and the first connector 320 cooperate to form a reliable connection structure. The close fit between the groove 311 and the first clamp ring 510 and the second clamp ring 321 ensures a firm connection between the first explosion-proof valve 500 and the box body 100, and prevents it from loosening or falling off due to vibration of the battery module 200 or changes in air pressure. This connection method can withstand a certain amount of tension, pressure, and torque, ensuring the smooth transmission of gas from the first accommodating chamber 210 into the guide channel 110, thereby improving the safety and reliability of the battery pack.

[0074] Specifically, a quick locking device, such as a bolt, a nut or a buckle, is provided on the clamp 310. These devices can quickly fix the clamp 310 to ensure the firmness of the connection, and are also convenient for disassembly and maintenance when needed.

[0075] Specifically, the first clamp ring 510 and the second clamp ring 321 may be circular ring structures.

[0076] In some embodiments, the groove 311 is an annular groove 311. A sealing ring 330 is disposed within the groove 311. The sealing ring 330 is located on the sidewall surrounding the connection between the first explosion-proof valve 500 and the first connector 320. The sealing ring 330 effectively fills the gap between the first explosion-proof valve 500 and the first connector 320, preventing gas leakage. Specifically, the sealing ring 330 may be a rubber sealing ring.

[0077] like Figures 10 to 16 As shown, in another embodiment, the connecting assembly 300 includes a second connecting member 340 and a third connecting member 350. One end of the second connecting member 340 is connected to the first explosion-proof valve 500, and the other end is connected to the third connecting member 350. The end of the third connecting member 350 away from the second connecting member 340 is connected to the inner side wall of the box body 100. The second connecting member 340 and the third connecting member 350 are arranged at an angle. The connecting assembly 300 of this embodiment can adapt to different longitudinal beams 140. In this embodiment, except that the structure of the connecting assembly 300 is different from that of the previous embodiment, so that the connecting assembly 300 can adapt to different longitudinal beams 140 of the box body 100, the other structures are the same.

[0078] Specifically, the second connecting member 340 and the third connecting member 350 are an integrally formed structure.

[0079] Specifically, the second connecting member 340 and the third connecting member 350 are tubular structures.

[0080] Specifically, the second connecting member 340 and the third connecting member 350 are arranged perpendicularly. The second connecting member 340 is arranged in the horizontal direction, and the third connecting member 350 is arranged in the vertical direction.

[0081] Specifically, a sealing ring may be provided at the connection between the third connecting member 350 and the inner wall of the box body 100 to enhance the sealing performance of the connection.

[0082] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A battery pack, characterized in that: include: A box body, wherein a flow guide channel is opened in the side wall of the box body; A battery module, the battery module is disposed in the box, and a first accommodating cavity is provided in the battery module, the first accommodating cavity is used to accommodate a battery cell; and A connecting component having a hollow structure, one end of the connecting component being connected to the guide channel, and the other end being connected to the first accommodating chamber; a discharge hole being provided on the side wall of the box body, the discharge hole being connected to the guide channel, and the gas in the first accommodating chamber can be discharged to the outside through the connecting component, the guide channel and the discharge hole in sequence.

2. The battery pack according to claim 1, wherein: The side wall of the box body includes a crossbeam and multiple longitudinal beams, one end of the multiple longitudinal beams is spaced apart from the crossbeam, a first channel is opened in the longitudinal beam, the multiple first channels are connected to one end of the connecting component, a second channel is opened in the crossbeam, the second channel is connected to the multiple first channels, and the discharge hole is opened.

3. The battery pack according to claim 1, wherein: The battery pack includes a first liquid cooling plate and a second liquid cooling plate. The first liquid cooling plate is arranged at the top of the battery module, and the second liquid cooling plate is arranged at the bottom of the battery module. The first liquid cooling plate, the second liquid cooling plate and the side wall of the box body enclose a second accommodating cavity, and the second accommodating cavity is used to accommodate multiple battery modules.

4. The battery pack according to claim 3, wherein: The battery pack includes a fastener, the first liquid cooling plate is provided with a first mounting hole, the top of the battery module is provided with a second mounting hole, and the fastener is passed through the first mounting hole and the second mounting hole.

5. The battery pack according to claim 1, wherein: The battery pack includes a first explosion-proof valve, which is arranged on the outer wall of the battery module and is connected to the first accommodating chamber. One end of the first explosion-proof valve away from the outer wall of the battery module is connected to the connecting assembly. When the air pressure in the first accommodating chamber is greater than a first threshold, the first explosion-proof valve opens to allow the gas in the first accommodating chamber to enter the connecting assembly and the guide channel.

6. The battery pack according to claim 5, characterized in that: The connecting assembly includes a clamp and a first connecting member, the first connecting member is arranged on the inner side wall of the box facing the battery module, the inner side wall of the clamp is provided with a groove, the end of the first explosion-proof valve away from the battery module is provided with a first clamp ring adapted to the groove, the end of the first connecting member away from the inner side wall of the box is provided with a second clamp ring adapted to the groove, and the first clamp ring and the second clamp ring are both arranged in the groove.

7. The battery pack according to claim 6, characterized in that: The groove is an annular groove, and a sealing ring is attached to the groove. The sealing ring is located on the peripheral side wall of the connection between the first explosion-proof valve and the first connecting member.

8. The battery pack according to claim 5, characterized in that: The connecting assembly includes a second connecting member and a third connecting member, one end of the second connecting member is connected to the first explosion-proof valve, and the other end is connected to the third connecting member, and the end of the third connecting member away from the second connecting member is connected to the inner wall of the box body, and the second connecting member and the third connecting member are arranged at an angle.

9. The battery pack according to claim 8, characterized in that: The third connecting member is arranged along the vertical direction.

10. The battery pack according to claim 1, wherein: The battery pack includes a second explosion-proof valve, which is arranged on the hole wall of the discharge hole. When the air pressure in the guide channel is greater than a second threshold, the second explosion-proof valve opens to allow the gas in the guide channel to be discharged to the outside.

Images