Battery pack and electric device

Abstract

A battery pack and an electric device. In the battery pack, explosion-proof valves (230) are provided on bottom walls (210) of battery cells (200), and the bottom walls (210) of the battery cells (200) face a bottom plate (110) of a case (100), so that when the battery cells (200) experience thermal runaway, the explosion-proof valves (230) can release pressure and exhaust gas toward the bottom plate (110), reducing the impact on the upper portion of the battery pack, improving the safety; in addition, supporting members (300) are provided between a first beam (130) and a second beam (140) of the case (100), the supporting members (300) are used for connecting the bottom walls (210) of the battery cells (200), and top walls (220) of the battery cells (200) are connected to a top plate (120) of the case (100), so that the supporting members (300) can form support under the battery cells (200), and thus the battery cells (200) can be stably mounted in an accommodating cavity of the case (100), improving the stability and safety of the battery pack.

Description

Battery packs and electrical equipment

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on October 31, 2023, with application number 202322948122.0 and application name “Battery Pack and Electrical Equipment”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The embodiments of the present application relate to, but are not limited to, the field of battery technology. Background Art

[0003] With the continuous development of the new energy vehicle market, battery packs, as the core energy storage and supply devices of new energy vehicles, are attracting increasing attention to their safety. Currently available battery packs typically contain multiple battery cells, each equipped with an explosion-proof valve to relieve pressure in the event of thermal runaway. Furthermore, to ensure secure installation of the battery cells in the pack, the cells are typically positioned upright with their explosion-proof valves facing upward. This means that the explosion-proof valves face the passenger compartment during pressure relief, increasing the risk to passengers.

[0004] Summary of the Invention

[0005] The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

[0006] According to a first aspect of the present application, an embodiment of the present application provides a battery pack, comprising:

[0007] A box body having a first direction and a second direction intersecting each other, the box body comprising a bottom plate and a top plate oppositely disposed along the first direction, a first beam and a second beam oppositely disposed along the second direction, the first beam and the second beam being connected between the bottom plate and the top plate to enclose a receiving cavity;

[0008] a battery cell, the battery cell being disposed in the accommodating cavity, the battery cell comprising a bottom wall and a top wall disposed opposite to each other along the first direction, the bottom wall being provided with an explosion-proof valve, the bottom wall being disposed toward the bottom plate, and the top wall being connected to the top plate;

[0009] A support member is connected between the first beam and the second beam and is located between the battery cell and the bottom plate; the support member is connected to the bottom wall and is spaced apart from the bottom plate along the first direction.

[0010] In some embodiments, the support member has an exhaust channel and an air hole connected to the exhaust channel, and the air hole is arranged toward the explosion-proof valve;

[0011] An orthographic projection of the explosion-proof valve on the support member along the first direction is at least partially located within the air hole.

[0012] In some embodiments, the bottom wall has an explosion-proof hole, the explosion-proof hole is opposite to the air hole along the first direction, and the explosion-proof hole and the air hole are sealed and connected, and the explosion-proof valve cover is sealed on the explosion-proof hole.

[0013] In some embodiments, the battery cells and the air holes are both provided in plural numbers, and the explosion-proof valve of each battery cell corresponds to one air hole.

[0014] In some embodiments, the first beam is provided with a converging channel and a pressure relief device, the converging channel has an air inlet and an air outlet, the air inlet is connected to the exhaust channel, and the pressure relief device is covered with the air outlet, wherein the air inlet is arranged on a side of the first beam close to the battery cell, and the air outlet is arranged on a side of the first beam away from the battery cell.

[0015] In some embodiments, the second beam is provided with a confluence channel and a pressure relief device, the confluence channel has an air inlet and an air outlet, the air inlet is connected to the exhaust channel, and the pressure relief device is covered with the air outlet, wherein the air inlet is arranged on a side of the second beam close to the battery cell, and the air outlet is arranged on a side of the second beam away from the battery cell.

[0016] In some embodiments, a plurality of battery cells are provided in the accommodating cavity, and the plurality of battery cells are arranged along a third direction, and the third direction intersects with the first direction and the second direction;

[0017] There are a plurality of support members, and the plurality of support members are arranged along the third direction, and one support member corresponds to at least one battery cell.

[0018] In some embodiments, the support member is provided with an escape space on at least one side along the third direction, and the escape space is connected to the accommodating cavity.

[0019] The battery cell includes a pole arranged on the bottom wall, and the battery pack also includes a bus bar connecting the poles of two adjacent battery cells. The bus bar and the poles are arranged in the avoidance space.

[0020] In some embodiments, the support member is supported between two battery cells adjacently arranged along a third direction, and the third direction intersects with the first direction and the second direction;

[0021] The support member comprises:

[0022] A body, which is arranged on a side of the battery cell away from the top plate and connects the bottom walls of two adjacent battery cells;

[0023] The spacer is connected to a side of the body away from the bottom plate and is disposed between two adjacent battery cells to space the two adjacent battery cells.

[0024] In some embodiments, the support member has a receiving groove disposed toward the bottom wall;

[0025] The battery cell includes a pole arranged on the bottom wall, and the battery pack also includes a bus bar connecting the poles of two adjacent battery cells. The bus bar and the poles are arranged in the accommodating groove.

[0026] In some embodiments, the support member has an inner cavity and a receiving hole communicating with the inner cavity;

[0027] The battery cell includes a pole arranged on the bottom wall, and the pole is passed through the receiving hole;

[0028] The battery pack further includes a bus bar, which is disposed in the inner cavity and connects the poles of two adjacent battery cells.

[0029] In some embodiments, the support member is made of insulating material.

[0030] In some embodiments, the battery pack further comprises:

[0031] A protective layer is connected between the bottom wall and the support member.

[0032] According to the second aspect of the present application, an embodiment of the present application provides an electrical device, comprising the battery pack described in any of the above embodiments.

[0033] The battery pack of an embodiment of the present application includes: a box body, the box body has a first direction and a second direction intersecting each other, the box body includes a bottom plate and a top plate arranged opposite to each other along the first direction, a first beam and a second beam arranged opposite to each other along the second direction, the first beam and the second beam are connected between the bottom plate and the top plate and form a accommodating cavity; a battery cell, the battery cell is arranged in the accommodating cavity, the battery cell includes a bottom wall and a top wall arranged opposite to each other along the first direction, the bottom wall is provided with an explosion-proof valve, the bottom wall is arranged toward the bottom plate, and the top wall is connected to the top plate; a support member, the support member is connected between the first beam and the second beam, and is located between the battery cell and the bottom plate; the support member is connected to the bottom wall, and is spaced apart from the bottom plate along the first direction. The battery pack is provided with an explosion-proof valve on the bottom wall of the battery cell, and the bottom wall of the battery cell is arranged toward the bottom plate of the box, so that when the battery cell has thermal runaway, the explosion-proof valve can release pressure and exhaust gas toward the bottom plate, reducing the impact on the top of the battery pack and improving safety; on the other hand, a support member is provided between the first beam and the second beam of the box, and the support member is used to connect the bottom wall of the battery cell, and the top wall of the battery cell is connected to the top plate of the box, so that the support member can form a support below the battery cell, so that the battery cell can be firmly installed in the accommodating cavity of the box, thereby improving the stability and safety of the battery pack; and the battery cell is supported by the support member set at a distance from the bottom plate, so that a buffer space is formed between the battery cell and the bottom plate, thereby preventing the impact of the bottom from being directly transmitted from the bottom plate to the battery cell, reducing or even avoiding damage to the battery cell.

[0034] The electrical equipment of the embodiment of the present application may include all the technical features and beneficial effects of the above-mentioned battery pack, which will not be repeated here.

[0035] Still other aspects will become apparent upon reading and understanding the accompanying drawings and detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0037] FIG1 is a schematic diagram of the three-dimensional structure of a battery pack provided in an embodiment of the present application;

[0038] FIG2 is a schematic diagram of an exploded structure of parts of a battery pack according to the first embodiment of the present application;

[0039] FIG3 is a schematic diagram of the exploded structure of the battery pack according to the first embodiment of the present application viewed from another angle;

[0040] FIG4 is a schematic diagram of a partially enlarged structure of area A in FIG3 ;

[0041] FIG5 is a schematic diagram of the three-dimensional structure of the battery pack of the first embodiment of the present application with the bottom plate removed;

[0042] FIG6 is a schematic diagram of the three-dimensional structure of a battery cell in a battery pack according to an embodiment of the present application;

[0043] FIG7 is a schematic diagram of the front structure of a battery pack according to an embodiment of the present application;

[0044] FIG8 is a schematic cross-sectional view of the first embodiment of the present application along line AA in FIG7 ;

[0045] FIG9 is a schematic diagram of a partially enlarged structure of area B in FIG8 ;

[0046] FIG10 is a schematic perspective view of the cross-sectional structure in FIG8 ;

[0047] FIG11 is a schematic diagram of a partially enlarged structure of area C in FIG10 ;

[0048] FIG12 is a schematic cross-sectional view of the first embodiment of the present application along line BB in FIG7 ;

[0049] FIG13 is a schematic diagram of a partially enlarged structure of area D in FIG12;

[0050] FIG14 is a schematic perspective view of the cross-sectional structure in FIG12;

[0051] FIG15 is a schematic diagram of a partially enlarged structure of the E region in FIG14;

[0052] FIG16 is a schematic diagram of an exploded structure of parts of a battery pack in a second embodiment of the present application;

[0053] FIG17 is a schematic diagram of a partially enlarged structure of the F area in FIG16;

[0054] FIG18 is a schematic diagram of the exploded structure of the battery pack according to the second embodiment of the present application, viewed from another angle;

[0055] FIG19 is a schematic diagram of a partially enlarged structure of the G area in FIG18;

[0056] FIG20 is a perspective view of the cross-sectional structure of the second embodiment of the present application along line BB in FIG7 ;

[0057] FIG21 is a schematic diagram of a partially enlarged structure of area I in FIG20;

[0058] FIG22 is a perspective view of the cross-sectional structure of the second embodiment of the present application along line AA in FIG7 ;

[0059] FIG23 is a schematic diagram of a partially enlarged structure of area I in FIG22;

[0060] Figure markings: 100-box; 110-bottom plate; 120-top plate; 130-first beam; 131-bus; 132-pressure relief device; 133-air inlet; 134-air outlet; 140-second beam; 150-accommodating chamber; 160-adhesive layer; 170-avoidance space; 200-battery cell; 210-bottom wall; 220-top wall; 230-explosion-proof valve; 240-pole; 250-bus; 300-support member; 310-main body; 320-spacer; 330-exhaust channel; 340-air hole; 350-exhaust hole.

[0061] Implementation Methods of the Application

[0062] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0063] In the description of this application, it should be understood that the terms "length", "width", "thickness", "upper", "lower", "top", "bottom", "inner", "outer", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting this application. In the description of this application, "plurality" means two or more, and "at least one" means one, two, or more than two, unless otherwise clearly and specifically defined.

[0064] It should also be noted that in the drawings of the embodiments of the present application, the arrows marked X, Y, and Z respectively represent the first direction X, the second direction Y, and the third direction Z. The description of the present application introduces the first direction X, the second direction Y, and the third direction Z to more clearly illustrate the structure and relative positional relationship of each component in the battery pack. The first direction X, the second direction Y, and the third direction Z are three relative directions that intersect with each other, rather than absolute directions. In actual applications, the first direction X, the second direction Y, and the third direction Z can point to any direction in space as long as the intersection relationship between the three is maintained. Optionally, the first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0065] An embodiment of the present application provides a battery pack that can realize inverted installation of battery cells, thereby avoiding safety hazards above the battery pack and ensuring the stability of battery cell installation.

[0066] Specifically, referring to Figures 1 to 23 , the battery pack of the present embodiment includes a housing 100, battery cells 200, and a support member 300. The battery cells 200 are the core components of the battery pack, used to store and release electrical energy. The housing 100 serves as an outer shell to protect the battery cells 200, providing thermal insulation, waterproofing, and fire protection to ensure battery safety. The support member 300 is disposed within the housing 100 to support the battery cells 200 and, together with the housing 100, secure the battery cells 200.

[0067] In the embodiment of the present application, the housing 100 includes a bottom plate 110 and a top plate 120 arranged opposite each other along a first direction X, and a first beam 130 and a second beam 140 arranged opposite each other along a second direction Y. The first beam 130 and the second beam 140 are connected between the bottom plate 110 and the top plate 120 and define a receiving chamber 150. A battery cell 200 is disposed within the receiving chamber 150 and includes a bottom wall 210 and a top wall 220 arranged opposite each other along the first direction X. The bottom wall 210 is provided with an explosion-proof valve 230 and faces the bottom plate 110. The top wall 220 is connected to the top plate 120. A support member 300 is connected between the first beam 130 and the second beam 140. The support member 300 is disposed between the battery cell 200 and the bottom plate 110, connected to the bottom wall 210, and spaced apart from the bottom plate 110 along the first direction X.

[0068] That is, in the battery pack of the present embodiment, the explosion-proof valve 230 of the battery cell 200 faces the bottom plate 110 of the housing 100. Therefore, if thermal runaway occurs, the explosion-proof valve 230 ruptures, releasing high-temperature, high-pressure air toward the bottom plate 110 without impacting the top plate 120, thus preventing impacts above the battery pack and reducing safety risks. Furthermore, the support member 300 is connected between the first beam 130 and the second beam 140 and positioned between the battery cell 200 and the bottom plate 110. The support member 300 is connected to the bottom wall 210, thereby providing support from below the battery cell 200. Simultaneously, the top wall 220 of the battery cell 200 is connected to the top plate 120 of the housing 100, thereby working together with the support member 300 to clamp and secure the battery cell 200 between them, further enhancing the installation stability of the battery cell 200. In addition, the battery cell 200 is supported by the support member 300 spaced apart from the bottom plate 110, so that a buffer space is formed between the battery cell 200 and the bottom plate 110, thereby preventing the impact of the bottom from being directly transmitted from the bottom plate 110 to the battery cell 200, reducing or even avoiding damage to the battery cell 200.

[0069] Specifically, the battery cell 200 includes a shell, and a storage space is formed inside the shell. The electrode assembly of the battery cell 200 is arranged in the storage space. The bottom wall 210 of the battery cell 200 is a part of the shell, that is, the bottom wall 210 can be any wall of the shell, and the top wall 220 is another wall of the shell arranged opposite the bottom wall 210. The bottom wall 210 and the top wall 220 can be an integral structure, or a detachable structure or a welded fixed structure. Alternatively, the shell can include a main body and a cover. The main body forms a storage space with an open end. The cover is connected to the main body by a detachable manner or a welding manner and covers the opening. The bottom wall 210 can be the cover part or any wall of the main body. The specific configuration can be made according to actual needs.

[0070] Please refer again to Figures 1 to 23 . In this embodiment of the present application, a plurality of battery cells 200 are disposed within the accommodating cavity 150 , and the plurality of battery cells 200 are arranged along the third direction Z. Furthermore, a plurality of support members 300 are provided, and the plurality of support members 300 are arranged along the third direction Z, with one support member 300 corresponding to at least one battery cell 200 . Thus, each battery cell 200 has a corresponding support member 300 , and each battery cell 200 can be supported by the corresponding support member 300 . For example, referring to Figures 2 to 15 , in the first embodiment of the present application, a support member 300 is disposed between two battery cells 200 adjacent to each other along the third direction Z. In other words, in this embodiment, one support member 300 can support two battery cells 200 adjacent to each other along the third direction Z. For another example, referring to Figures 16 to 23 , each battery cell 200 arranged along the third direction Z has a support member 300 disposed beneath it to support it.

[0071] In some embodiments, a support member 300 is provided with an escape space 170 on at least one side along the third direction Z. The escape space 170 communicates with the accommodating cavity 150. The battery cells 200 include posts 240 disposed on the bottom wall 210. The battery pack also includes a busbar 250, which connects the posts 240 of two adjacent battery cells 200. The busbar 250 and the posts 240 are disposed within the escape space 170. Forming the escape space 170 on both sides of the support member 300 allows for the posts 240 and busbar 250 to be avoided, thereby providing space for connecting adjacent battery cells 200. This facilitates series and parallel connection of the battery cells 200, prevents the protruding posts 240 and busbar 250 from interfering with the fixation of the battery cells 200, and improves the stability of the battery cell 200 installation. Moreover, by setting up the avoidance space 170, on the one hand, the pole 240 and the bus 250 can be avoided, providing space for electrical connection, thereby reducing the space occupied by the battery cell 200 in the first direction X; on the other hand, a bottom impact space is provided for the battery pack, which can realize the overlap of the bottom impact space, exhaust space and electrical connection space of the battery pack, thereby improving the rationality of the battery pack space utilization.

[0072] It should be noted that in the above embodiment, the explosion-proof valve 230 and the pole 240 of the battery cell 200 are both arranged on the bottom wall 210, that is, the battery cell 200 is completely inverted. In this solution, the top wall 220 of the battery cell 200 is connected to the top plate 120 of the box body 100 by means of an adhesive connection. The adhesive connection method itself has a certain fixing effect, but as the use time passes or the temperature of the battery pack changes, the reliability of the adhesive connection will decrease. In the embodiment of the present application, due to the provision of the support member 300, a fixing effect can be provided at the bottom of the battery cell 200, reducing the reliance on the top connection, reducing the probability of failure, and improving the reliability of the battery and extending the service life.

[0073] Referring again to Figures 4, 9, and 11, in the first embodiment, a plurality of support members 300 are arranged at intervals along the third direction Z. The support members 300 support two adjacent battery cells 200 along the third direction Z. The support members 300 include a body 310 and a spacer 320. The body 310 is disposed on a side of the battery cell 200 away from the top plate 120 and connects the bottom walls 210 of the two adjacent battery cells 200. The spacer 320 is connected to a side of the body 310 away from the bottom plate 110 and is disposed between the two adjacent battery cells 200 to separate the two adjacent battery cells 200. By disposing the support members 300 between two adjacent battery cells 200 along the third direction Z, the spacer 320 of the support members 300 can separate the two adjacent battery cells 200, thereby limiting the distance between the two adjacent battery cells 200, preventing mutual influence between the two battery cells 200 and thereby preventing the transmission of thermal runaway.

[0074] Referring to Figures 16 to 23 , in the second embodiment of the present application, the support member 300 has an exhaust passage 330 and an air hole 340 communicating with the exhaust passage 330 . The air hole 340 is disposed toward the explosion-proof valve 230 of the battery cell 200 . Furthermore, the orthographic projection of the explosion-proof valve 230 on the support member 300 along the first direction X is at least partially located within the air hole 340 . Therefore, when the explosion-proof valve 230 ruptures, the high-temperature, high-pressure gas within the battery cell 200 is discharged outward through the explosion-proof valve 230 . Because the orthographic projection of the explosion-proof valve 230 on the support member 300 along the first direction X is at least partially located within the air hole 340 , at least a portion of the high-temperature, high-pressure gas is discharged directly toward the air hole 340 and then rapidly discharged outward through the exhaust passage 330 within the support member 300 . This allows the gas discharge path to be controlled, preventing any impact on adjacent battery cells 200 and improving safety.

[0075] Furthermore, referring to Figure 6 , in this embodiment, an explosion-proof hole is provided through the bottom wall 210. The explosion-proof hole faces the air hole 340 along the first direction X, and the explosion-proof hole and the air hole 340 are sealed and connected. The explosion-proof valve 230 is sealed to the explosion-proof hole. Therefore, if a battery cell 200 experiences thermal runaway and the explosion-proof valve 230 ruptures, high-temperature, high-pressure airflow can be directly ejected toward the air hole 340. The airflow can directly enter the exhaust channel 330 without overflowing from the space between the explosion-proof valve 230 and the air hole 340, thus preventing it from affecting adjacent battery cells 200 and further improving safety.

[0076] Please refer to Figure 16. In this embodiment, there are multiple battery cells 200 and multiple air holes 340, and the explosion-proof valve 230 of each battery cell 200 corresponds to one air hole 340. Therefore, each battery cell 200 has a corresponding air hole 340 to avoid mutual influence between each battery cell 200. For example, please refer to Figures 16, 17 and 18. Multiple battery cells 200 are arranged in an array along the second direction Y and the third direction Z respectively. Multiple support members 300 are provided along the third direction Z. The support members 300 extend along the second direction Y, and each support member 300 is provided with multiple air holes 340, and the multiple air holes 340 are arranged at intervals along the second direction Y. In the first direction X, the explosion-proof valve 230 of each battery cell 200 is arranged opposite to a vent 340 , so that when any battery cell 200 experiences thermal runaway, the pressure released by its explosion-proof valve 230 can be discharged from the corresponding vent 340 to avoid affecting other battery cells 200.

[0077] Please refer to Figures 16 to 23 again. In this embodiment, the first beam 130 and / or the second beam 140 are provided with a converging channel 131 and a pressure relief device 132. The converging channel 131 has an air inlet 133 and an air outlet 134. The air inlet 133 is connected to the exhaust channel 330, and the pressure relief device 132 is covered with the air outlet 134. The air inlet 133 is arranged on the side of the first beam 130 and / or the second beam 140 close to the battery cell 200, and the air outlet 134 is arranged on the side of the first beam 130 and / or the second beam 140 away from the battery cell 200. Therefore, when a battery cell 200 experiences thermal runaway, the high-temperature, high-pressure gas discharged from the explosion-proof valve 230 enters the confluence channel 131 through the exhaust channel 330 and is discharged through the pressure relief device 132. Because the pressure relief device 132 is located on the side facing away from the battery cell 200, the high-temperature, high-pressure gas discharged from the pressure relief device 132 will not affect the battery cell 200, thus ensuring safety. Specifically, the first beam 130 and / or the second beam 140 are connected by multiple plates to form a hollow structure. The confluence channel 131 is a hollow pipe formed inside the first beam 130 and / or the second beam 140. The first beam 130 and / or the second beam 140 are fixedly connected to the bottom plate 110 of the housing 100. The ends of the support member 300 are sealed to the first beam 130 and / or the second beam 140, so that the exhaust channel 330 in the support member 300 communicates with the confluence channel 131 in the first beam 130 and / or the second beam 140.

[0078] Specifically, referring to Figures 17 and 19 , in the second embodiment, exhaust holes 350 are provided at the ends of the support member 300 along the second direction Y. The exhaust holes 350 are in communication with the exhaust channel 330. Accordingly, air inlets 133 are provided on the first beam 130 and / or the second beam 140. The exhaust holes 350 are in sealed communication with the air inlet 133. Thus, airflow entering the exhaust channel 330 can flow through the exhaust holes 350 into the air inlet 133, and then into the converging channel 131 through the air inlet 133, before being discharged through the pressure relief device 132. Furthermore, along the third direction Z, the first beam 130 and / or the second beam 140 are provided with a plurality of air inlets 133, each air inlet 133 corresponds to a support member 300, and is sealed and connected to the exhaust hole 350 on the corresponding support member 300, so that the plurality of exhaust channels 330 spaced apart along the third direction Z are all connected to the corresponding air inlets 133, and can all be connected to the confluence channel 131 through the corresponding air inlets 133, and thus the discharged high-temperature and high-pressure airflow can all flow from the confluence channel 131 to the pressure relief device 132, and be discharged through the pressure relief device 132.

[0079] Furthermore, in some embodiments, the support member 300 is spaced apart from the base plate 110 along the first direction X. The support member 300 is supported by the first beam 130 and the second beam 140, so that the weight of the battery cells 200 can be transferred to the first beam 130 and the second beam 140 through the support member 300, thereby preventing excessive compression of the base plate 110. Furthermore, in the field of new energy vehicles, when the base plate 110 is impacted by a bump on the ground, the impact force will not directly act on the battery cells 200 because the battery cells 200 are supported by the support member 300 and spaced apart from the base plate 110, thereby improving the safety of the battery pack.

[0080] In some embodiments, the support member 300 has a receiving groove (not shown) disposed toward the bottom wall 210. The battery cells 200 include posts 240 disposed on the bottom wall 210. The battery pack also includes a busbar 250 that connects the posts 240 of two adjacent battery cells 200. The busbar 250 and the posts 240 are disposed within the receiving groove. This can reduce the dimensions in the first direction X, improving the space utilization of the battery pack.

[0081] In some embodiments, the support member 300 has an inner cavity and a receiving hole (not shown) communicating with the inner cavity. The battery cells 200 include posts 240 disposed on the bottom wall 210 and extending through the receiving hole. The battery pack also includes a busbar 250 disposed within the inner cavity and connecting the posts 240 of two adjacent battery cells 200. Similarly, the dimensions in the first direction X can be reduced, improving the space utilization of the battery pack. Furthermore, the busbar 250 is not subjected to the pressure of the battery cells 200 and is less susceptible to deformation.

[0082] Furthermore, in some embodiments, the support member 300 is made of insulating material, or an insulating gasket may be provided on the wall of the receiving hole to ensure insulation performance.

[0083] In some embodiments, the battery pack further includes a protective layer (not shown), which is connected between the bottom wall 210 and the support member 300. The protective layer is used to further protect the battery pack and enhance the safety of the battery pack.

[0084] The protective layer can be a single-layer structure. For example, the protective layer can be a flame-retardant insulation layer, such as a mica board or a spray coating, which can play a further role in protecting against thermal runaway. Because when the explosion-proof valve 230 erupts, the temperature of the reactants is extremely high. A flame-retardant insulation layer is provided as a protective layer to prevent the excessive temperature from affecting the surrounding materials, avoid ignition and fire, and further reduce the risk of safety accidents. For example, the protective layer can also be an insulating layer. The insulating layer can play a role in electrical insulation protection, eliminating the problems of electrical clearance and creepage distance, and at the same time preventing the occurrence of short circuit problems caused by insulation failure, thereby affecting the electrical safety of the entire package. It should be noted that the battery cell 200 is often provided with insulation protection measures, such as an external insulating blue film, an insulating top cover, etc., but because the battery cell 200 needs to be clamped by force, insulation damage may occur during use. Then, providing an insulating layer as a protective layer can further improve its insulation protection performance.

[0085] Of course, the protective layer can be a multi-layer laminated structure. That is, for example, the flame retardant and heat-insulating layers and the insulating layer can be combined, that is, a layer can be provided between the two. Of course, a single protective layer can also be provided that has both insulating and heat-insulating flame retardant functions.

[0086] In addition, the protective layer may also include an adhesive layer to further strengthen the connection stability between the battery cell 200 and the support member 300. Furthermore, an adhesive layer 160 may also be provided between the battery cell 200 and the top plate 120 to strengthen the connection between the top plate 120 and the battery cell 200 and improve the installation stability of the battery cell 200.

[0087] Accordingly, an embodiment of the present application provides an electrical device, which can be various types of equipment such as new energy vehicles, computers, energy storage and power supply devices, etc. It can be understood that the electrical device can include all the technical features and beneficial effects of the above-mentioned battery pack, which will not be repeated here.

[0088] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0089] The above is a detailed introduction to the battery pack and electrical equipment provided in the embodiments of the present application, and specific examples are used to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application; ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery pack, wherein: include: A box body, the box body having a first direction and a second direction intersecting each other, the box body comprising a bottom plate and a top plate arranged opposite to each other along the first direction, a first beam and a second beam arranged opposite to each other along the second direction, the first beam and the second beam being connected between the bottom plate and the top plate to form a receiving cavity; A battery cell, the battery cell is arranged in the accommodating cavity, the battery cell comprises a bottom wall and a top wall arranged opposite to each other along the first direction, the bottom wall is provided with an explosion-proof valve, the bottom wall is arranged toward the bottom plate, and the top wall is connected to the top plate; A support member is connected between the first beam and the second beam and is located between the battery cell and the bottom plate; the support member is connected to the bottom wall and is spaced apart from the bottom plate along the first direction.

2. The battery pack according to claim 1, wherein: The support member has an exhaust passage and an air hole connected to the exhaust passage, and the air hole is arranged toward the explosion-proof valve; An orthographic projection of the explosion-proof valve on the support member along the first direction is at least partially located within the air hole.

3. The battery pack according to claim 2, wherein: The bottom wall has an explosion-proof hole, the explosion-proof hole is directly opposite to the air hole along the first direction, and the explosion-proof hole is sealed and connected to the air hole, and the explosion-proof valve cover is sealed on the explosion-proof hole.

4. The battery pack according to claim 2, wherein: The battery cells and the air holes are both provided in plural numbers, and the explosion-proof valve of one battery cell corresponds to one air hole.

5. The battery pack according to claim 2, wherein: The first beam is provided with a confluence channel and a pressure relief device, the confluence channel has an air inlet and an air outlet, the air inlet is connected to the exhaust channel, the pressure relief device is covered and sealed with the air outlet, the air inlet is arranged on a side of the first beam close to the battery cell, and the air outlet is arranged on a side of the first beam away from the battery cell.

6. The battery pack according to claim 2, wherein: The second beam is provided with a converging channel and a pressure relief device, the converging channel has an air inlet and an air outlet, the air inlet is connected to the exhaust channel, the pressure relief device is covered and sealed with the air outlet, the air inlet is arranged on a side of the second beam close to the battery cell, and the air outlet is arranged on a side of the second beam away from the battery cell.

7. The battery pack according to any one of claims 1 to 6, wherein: A plurality of battery cells are arranged in the accommodating cavity, and the plurality of battery cells are arranged along a third direction, and the third direction intersects with the first direction and the second direction; There are a plurality of the support members, and the plurality of the support members are arranged along the third direction, and one of the support members corresponds to at least one of the battery cells.

8. The battery pack according to claim 7, wherein: The support member is provided with an escape space on at least one side along the third direction, and the escape space is connected to the accommodating cavity. The battery cell includes a pole arranged on the bottom wall, and the battery pack also includes a bus bar, which connects the poles of two adjacent battery cells, and the bus bar and the poles are arranged in the avoidance space.

9. The battery pack according to claim 1, wherein: The support member is supported between two battery cells adjacently arranged along a third direction, and the third direction intersects with the first direction and the second direction; The support member comprises: A body, which is disposed on a side of the battery cell away from the top plate and connects the bottom walls of two adjacent battery cells; The spacer is connected to a side of the body away from the bottom plate and is disposed between two adjacent battery cells to space the two adjacent battery cells.

10. The battery pack according to claim 1, wherein: The support member has a receiving groove arranged toward the bottom wall; The battery cell includes a pole arranged on the bottom wall, and the battery pack also includes a bus bar, which connects the poles of two adjacent battery cells, and the bus bar and the poles are arranged in the receiving groove.

11. The battery pack according to claim 1, wherein: The support member has an inner cavity and a receiving hole communicating with the inner cavity; The battery cell comprises a pole arranged on the bottom wall, and the pole is passed through the receiving hole; The battery pack further includes a bus bar, which is disposed in the inner cavity and connects the poles of two adjacent battery cells.

12. The battery pack according to claim 10 or 11, wherein: The support member is made of insulating material.

13. The battery pack according to claim 1, wherein: The battery pack further comprises: A protective layer is connected between the bottom wall and the support member.

14. An electrical device, wherein: A battery pack comprising the battery pack as claimed in any one of claims 1 to 13.

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