Battery monomer, lower plastic, battery device and power utilization device

Abstract

The utility model discloses a single battery, lower plastic, a battery device and a power utilization device, the single battery comprises a shell, the shell is provided with a first wall and a first insulating part, the first insulating part is arranged on one side, facing a cavity, of the first wall, and the first insulating part comprises a plate body and a supporting table, a pressure relief hole penetrating through the plate body in the first direction is formed in the plate body, the supporting table is connected to the two ends of the plate body in the second direction and protrudes out of the surface of the side, away from the first wall, of the plate body in the first direction, the supporting table comprises a plurality of supporting ribs, and the supporting ribs are matched to define a plurality of exhaust channels. The exhaust channels penetrate through the supporting table in the second direction and communicate with the pressure relief hole. According to the technical scheme, the stability of the internal structure of the battery monomer can be improved, the insulation performance in the battery monomer can be improved, the exhaust channel can stably communicate with the spaces on the two sides of the supporting table in the second direction, the pressure relief efficiency is improved, and the risk that the battery monomer is out of control is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery monomer, a battery device and a power utilization device. BACKGROUND

[0002] In the field of battery technology, especially in the design and construction of battery monomers, there are many technical challenges and problems. With the increasing requirement of battery energy density and the increasing diversification of application scenarios, the optimization of the internal structure of the battery monomer and the safety guarantee become the key research direction.

[0003] In the related art, the shell of the battery monomer is provided with an electrode assembly and a lower plastic, and the lower plastic is supported between the electrode assembly and the end cover of the shell. However, the lower plastic is prone to deformation when subjected to pressure between the electrode assembly and the end cover, and local buckling or depression phenomenon occurs, which seriously damages the originally stable structure inside the battery monomer, causes insulation risk, threatens the safety of the battery monomer, and the deformed lower plastic easily blocks the ventilation channel in the shell, causing difficulty in pressure relief. UTILITY MODEL CONTENT

[0004] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a battery monomer, a battery device and a power utilization device comprising the battery monomer, the battery monomer can improve the structural strength of the support platform, improve the structural strength of the first insulating piece, ensure the stability of the internal structure of the battery monomer, ensure the insulation performance inside the battery monomer, and also can improve the pressure relief efficiency and reduce the risk of out-of-control of the battery monomer.

[0005] In a first aspect, the embodiments of the present application provide a battery monomer, comprising: a shell, the shell defining a cavity inside, the shell having a first wall, the first wall being provided with a pressure relief structure; a first insulating piece, the first insulating piece being arranged on the side of the first wall facing the cavity, the first insulating piece comprising a plate body and a support platform, the plate body being formed with a pressure relief hole penetrating through the plate body in a first direction, the pressure relief hole being in communication with the pressure relief structure, the support platform being connected to both ends of the plate body in a second direction and protruding from the side surface of the plate body away from the first wall in the first direction, the first direction being the thickness direction of the plate body, and the second direction being the length direction of the plate body, wherein the support platform comprises a plurality of support ribs, and the plurality of support ribs cooperatively define a plurality of exhaust channels, the plurality of exhaust channels all penetrating through the support platform in the second direction and being in communication with the pressure relief hole.

[0006] In the technical solution, the support table of the first insulating piece is provided with multiple support ribs, which can improve the structural strength of the support table, reduce the probability of deformation of the support table under pressure, stably support the support table between the electrode assembly and the first wall, ensure the stability of the internal structure of the battery monomer, and ensure the insulation performance inside the battery monomer. Meanwhile, the multiple support ribs of the support table define an exhaust passage through the support table along the second direction. Since the support table can be stably supported between the electrode assembly and the first wall, the exhaust passage can stably communicate the spaces on both sides of the support table in the second direction. When gas is generated inside the battery monomer, when the gas flows to the end portion of the shell where the first insulating piece is arranged, the gas can pass through the exhaust passage to reach the position of the pressure relief hole, and then be discharged to the outside of the shell through the pressure relief structure, improving the pressure relief efficiency and reducing the risk of out-of-control of the battery monomer.

[0007] In some embodiments, the multiple support ribs extend along the second direction and are arranged in a third direction, which is the width direction of the plate body.

[0008] In the technical solution, the multiple support ribs extend along the second direction and are arranged in the third direction. When the support table is subjected to force, the multiple support ribs can uniformly disperse the force in the width direction of the plate body, further enhance the support stability of the support table between the first wall and the electrode assembly, and reduce the possibility of deformation caused by uneven local force, thereby better maintaining the stability of the internal structure of the battery monomer. Meanwhile, the support ribs extend along the second direction and are arranged in the third direction, so that the multiple exhaust passages extend along the second direction and are arranged in the third direction. Thus, the multiple exhaust passages can be more reasonably and uniformly distributed, and no matter where the gas inside the battery monomer is generated or gathered, it can be efficiently discharged through the exhaust passages, improving the pressure relief and exhaust efficiency of the support table and the uniformity of pressure relief, and further improving the reliability and stability of the battery monomer in operation.

[0009] In some embodiments, at least part of the multiple support ribs is arranged obliquely relative to the first direction.

[0010] In the technical solution, at least part of the multiple support ribs is arranged obliquely relative to the first direction. When the support table is subjected to pressure from different directions, the oblique support ribs can better decompose and resist pressure from different directions, reduce the probability of displacement of the first insulating piece, enhance the support stability of the first insulating piece between the electrode assembly and the first wall, improve the stability of the internal structure of the battery monomer, improve the insulation performance inside the battery monomer, and stably communicate the multiple exhaust passages on both sides of the support table in the second direction, improve the ventilation performance of the support table, and improve the pressure relief efficiency.

[0011] In some embodiments, the oblique directions of two adjacent support ribs in the third direction are different.

[0012] In the above technical solution, by making the inclined directions of the two support ribs adjacent in the third direction different, the support ribs with different inclined directions can cooperate with each other, and when the support table is subjected to pressure at any position, effective decomposition and buffering can be performed through the support ribs with different inclined directions, the overall stability of the first insulating piece is further strengthened, the probability of deformation caused by excessive local pressure is reduced, the structural integrity inside the battery monomer is better maintained, and the exhaust efficiency is improved.

[0013] In some embodiments, in the direction from the first insulating piece to the first wall, two adjacent and oppositely extending support ribs are connected and constitute a support part, and at least part of the plurality of support ribs constitutes a plurality of support parts.

[0014] In the above technical solution, the two adjacent and oppositely extending support ribs are connected to constitute a support part, at this time, the support part can be in the shape of an arch, a triangle or a trapezoid, and a plurality of support parts can form a plurality of support structures in the shape of an arch or a triangle, thereby further enhancing the compression resistance of the support table, further reducing the probability of deformation of the support table caused by pressure concentration, and reducing the insulation risk caused by structural deformation. At the same time, the higher-strength support part can make the structure of the exhaust passage more stable, thereby ensuring the ventilation performance inside the battery monomer, so that the pressure relief process can be smoothly performed.

[0015] In some embodiments, the two support ribs in the support part are connected in an arc.

[0016] In the above technical solution, the two support ribs in the support part are connected in an arc, which can make the stress smoothly transition at the connection position of the two support ribs, reduce the stress concentration point at the connection position of the two support ribs, make the connection position better withstand and disperse pressure, and enhance the compression resistance of the whole support part. At the same time, the arc connection of the two support ribs can make the inner wall of the exhaust passage smooth, reduce the flow resistance of the gas in the exhaust passage, and improve the exhaust efficiency of the exhaust passage.

[0017] In some embodiments, the plurality of support parts are sequentially connected in the third direction.

[0018] In the above technical solution, the plurality of support parts are sequentially connected in the third direction, which can connect the plurality of support parts into a whole, enhance the overall performance of the plurality of support parts, further enhance the overall structural strength of the plurality of support parts, further improve the overall compression resistance of the plurality of support parts, further reduce the deformation risk of the support table, and further ensure the ventilation performance of the support table.

[0019] In some embodiments, in the third direction, the two surfaces oppositely arranged between the two adjacent support parts are connected in an arc.

[0020] In the technical solution, the two surface arcs of the two adjacent support portions are connected, so that the stress at the connecting position of the adjacent support portions is dispersed, the stress concentration at the connecting position is reduced, the reliability and durability of the connecting position are improved, and when the exhaust passage is formed between the adjacent support portions, the two support portions are connected by arcs, so that the inner wall of the exhaust passage is smooth, the flow resistance of the gas in the exhaust passage is reduced, and the exhaust efficiency of the exhaust passage is improved.

[0021] In some embodiments, the plurality of support portions are formed as an integral piece.

[0022] In the technical solution, the plurality of support portions are formed as an integral piece, so that the integrity of the plurality of support portions is enhanced, the number of parts is reduced, the assembly efficiency is improved, and when the plurality of support portions are integrally formed as independent parts, the structure of the first insulation piece is simplified, and the processing difficulty is reduced.

[0023] In some embodiments, the support table further comprises a first plate, the first plate is arranged perpendicular to the first direction, the plurality of support ribs are connected to the first plate, and are located on the side of the first plate facing the first wall, and the first plate cooperates with the plurality of support ribs to define at least part of the plurality of exhaust passages.

[0024] In the technical solution, the first plate is arranged perpendicular to the first direction, and the plurality of support ribs are connected to the first plate, so that the structural strength of the support table is further improved, the integrity of the plurality of support ribs is enhanced, the compression resistance of the support table is improved, the probability of deformation of the support table is reduced, the internal structure of the battery cell is more stable, and the ventilation performance of the support table is more stable and reliable.

[0025] In some embodiments, the plurality of support ribs extend along the first direction, and in the first direction, the side edge of the plurality of support ribs facing the first wall does not exceed the surface of the plate body facing the first wall.

[0026] In the technical solution, the side edge of the plurality of support ribs facing the first wall does not exceed the side surface of the plate body facing the first wall, so that the first insulation piece can abut against the first wall through the plate body or through the plate body and the plurality of support pieces, the contact area between the first insulation piece and the first wall is increased, the probability of local excessive pressure is reduced, the probability of deformation of the first insulation piece is reduced, the stability of the internal structure of the battery cell is improved, and the support ribs do not protrude from the plate body, the occupied space of the support ribs is reduced, and the probability of interference between the support ribs and other parts is reduced.

[0027] In some embodiments, the support table further comprises a second plate, the second plate is arranged on the side of the first plate facing the first wall, the plurality of support ribs are arranged between the first plate and the second plate, and the side surface of the second plate facing the first wall is flush with the side surface of the plate body facing the first wall.

[0028] In the technical solution, the support table further comprises a second plate, and the plurality of support ribs are arranged between the first plate and the second plate. The second plate can further improve the structural strength of the support table, enhance the integrity of the plurality of support ribs, improve the compression resistance of the support table, and reduce the probability of deformation of the support table. Meanwhile, the side surface of the second plate facing the first wall is flush with the side surface of the plate body facing the first wall, so that the first insulation member can be attached to the first wall together with the second plate and the plate body, the probability of local excessive pressure is reduced, and the probability of deformation of the first insulation member is reduced. Thus, the stability of the internal structure of the battery monomer is improved, and the ventilation performance of the support table is more stable and reliable.

[0029] In some embodiments, the support table further comprises two partitions connected to the first plate and arranged on the side of the first plate facing the first wall. The two partitions are arranged in the third direction with a spacing therebetween, and the plurality of support ribs are arranged between the two partitions.

[0030] In the technical solution, the two partitions can further improve the structural strength of the support table and reduce the probability of deformation of the support table. The partitions can also form exhaust channels with the adjacent support ribs, thereby further increasing the number of exhaust channels and increasing the total flow cross-sectional area of the plurality of exhaust channels in the support table, thereby improving the ventilation performance of the support table.

[0031] In some embodiments, in the first direction, the side edge of the partition facing the first wall is flush with the surface of the plate body facing the first wall.

[0032] In the technical solution, the side edge of the partition facing the first wall is flush with the surface of the plate body facing the first wall, so that the partition and the plate body can jointly bear the pressure received by the first insulation member, the probability of local stress concentration is reduced, the probability of deformation of the first insulation member is reduced, the stability of the internal structure of the battery monomer is improved, and the ventilation performance of the plurality of exhaust channels is ensured.

[0033] In some embodiments, the plurality of support ribs form a plurality of support portions, each support portion comprising two support ribs adjacent in the third direction, and the two support ribs of each support portion are connected at the end facing the first wall. The exhaust channel is formed between the support portion and the first plate, and / or the exhaust channel is formed between the two adjacent support portions.

[0034] In the technical solution, by forming a plurality of support portions and forming the exhaust channel on one side or both sides of the support portion in the thickness direction, the structural strength of the support table can be improved, the risk of deformation can be reduced, and a stable exhaust channel structure can be formed, the risk of deformation of the exhaust channel due to crushing can be reduced, and the ventilation performance of the exhaust channel can be ensured.

[0035] In some embodiments, the support platform extends from one end to the other end of the plate body in a third direction, the third direction being a width direction of the plate body.

[0036] In the above technical solution, the support platform extends from one end to the other end of the plate body in the third direction, which can increase the length of the support platform in the third direction, and in the third direction, the support platform can uniformly support between the first wall and the electrode assembly, so that the first insulating piece can be uniformly stressed in the third direction, reducing the probability of deformation of the first insulating piece and ensuring the ventilation performance of the exhaust passage.

[0037] In some embodiments, in the third direction, the two side edges of the support platform are flush with the two side edges of the plate body, respectively.

[0038] In the above technical solution, the two side edges of the support platform in the third direction are flush with the two side edges of the plate body, respectively, which can uniformly distribute the support force of the first insulating piece in the third direction, effectively prevent the edge of the plate body from deforming, and also make the support platform not occupy additional space beyond the plate body in the third direction, compact structure, reduce space waste, and improve the energy density of the battery monomer.

[0039] In some embodiments, the inlet and outlet of the exhaust passage respectively pass through the two end faces of the support platform in the second direction, and the outlet of the exhaust passage is located on the side of the plate body away from the first wall in the first direction.

[0040] In the above technical solution, the outlet of the exhaust passage is located on the side of the plate body away from the first wall in the first direction, which can facilitate the molding of the exhaust passage under the premise of facilitating the communication of the outlet of the exhaust passage with the pressure relief hole, does not additionally occupy the space on the side of the plate body facing the first wall, reduces the occupied space of the first insulating piece in the battery monomer, has a compact structure, and improves the energy density of the battery monomer.

[0041] In some embodiments, the support platform is a polyimide piece, a polyether amine piece, an aluminum nitride piece, or an aluminum and polyimide composite material piece; or, the first insulating piece is a polyimide piece, a polyether amine piece, an aluminum nitride piece, or an aluminum and polyimide composite material piece.

[0042] In the above technical solution, the support platform or the first insulating piece is a polyimide piece, a polyether amine piece, an aluminum nitride piece, or an aluminum and polyimide composite material piece, which can improve the insulation performance and high temperature resistance of the first insulating piece, and improve the stability and reliability of the battery monomer in operation.

[0043] In some embodiments, the first insulating piece is integrally formed.

[0044] In the above technical solution, the first insulating piece is integrally formed, which can reduce the number of parts in the battery monomer, enhance the integrity and structural strength of the first insulating piece, and improve the insulation performance of the first insulating piece.

[0045] In some embodiments, the shell comprises: a main shell, which is open at least on one side in the first direction, and an end cover, which covers the open side of the main shell and cooperates with the main shell to define the cavity, and the at least one end cover is formed as the first wall.

[0046] In the above technical solution, by opening the main shell at least on one side in the first direction and covering the main shell with the end cover, the shell is divided into two parts, which can facilitate the installation and layout of the internal components of the battery monomer, facilitate the maintenance, replacement or upgrading of internal parts, and reduce the maintenance cost and difficulty. At the same time, forming the end cover as the first wall can facilitate the arrangement of the pole and the pressure relief structure and other components, optimize the positional relationship between various parts of the battery monomer, facilitate installation, and have a compact structure.

[0047] In a second aspect, embodiments of the present application provide a lower plastic, which is a first insulating piece in the battery monomer according to the first aspect of the present application.

[0048] In the above technical solution, since the support table is provided with multiple support ribs, the multiple support ribs can improve the structural strength of the support table, reduce the probability of deformation of the support table under pressure, enable the support table to stably support between the electrode assembly and the first wall, improve the stability of the internal structure of the battery monomer, and improve the insulation performance of the battery monomer. At the same time, the multiple support ribs of the support table define an exhaust passage through the support table in the second direction. Since the support table can be stably supported between the electrode assembly and the first wall, the exhaust passage can stably communicate the spaces on both sides of the support table in the second direction. When gas is generated inside the battery monomer, when the gas flows to the end portion of the shell provided with the first insulating piece, the gas can pass through the exhaust passage to reach the position of the pressure relief hole, and then can be discharged to the outside of the shell through the pressure relief structure, improving the pressure relief efficiency and reducing the risk of out-of-control of the battery monomer.

[0049] In a third aspect, embodiments of the present application provide a battery device, which comprises the battery monomer according to the first aspect of the present application.

[0050] In the above technical solution, because the battery device is equipped with the aforementioned battery cells, and because the support platform on the first insulation of the battery cells is provided with multiple support ribs, the multiple support ribs can improve the structural strength of the support platform, reduce the probability of deformation of the support platform under pressure, and enable the support platform to be stably supported between the electrode assembly and the first wall, thereby improving the stability of the internal structure of the battery cell and improving the internal insulation performance of the battery cell. At the same time, the multiple support ribs of the support platform define an exhaust channel that runs through the support platform along the second direction. Since the support platform can be stably supported between the electrode assembly and the first wall, the exhaust channel can stably connect the two sides of the support platform in the second direction. When gas is generated inside the battery cell, when the gas flows to the end of the housing where the first insulation is provided, the gas can pass through the exhaust channel to reach the pressure relief hole, and then be discharged to the outside of the housing through the pressure relief structure, thereby improving the pressure relief efficiency, reducing the risk of battery cell runaway, and thus improving the overall performance of the battery device.

[0051] Fourthly, embodiments of this application provide an electrical device, including a battery device according to the third aspect of this application.

[0052] In the above embodiments, by providing the battery device described in the third aspect, the overall performance of the power-consuming device is improved.

[0053] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0054] Figure 1 This is a structural schematic diagram of a vehicle according to an embodiment of this application;

[0055] Figure 2 This is an exploded view of the battery device according to an embodiment of this application;

[0056] Figure 3 This is a schematic diagram of the structure of a battery cell according to an embodiment of this application;

[0057] Figure 4 It is along Figure 3 Sectional view of line AA in the middle;

[0058] Figure 5 This is a top view of the top cover assembly of a battery cell according to some embodiments of this application;

[0059] Figure 6 yes Figure 5 Front view of the top cover assembly shown;

[0060] Figure 7 yes Figure 5 The top cover assembly shown is a bottom view.

[0061] Figure 8 is a sectional view taken along Figure 7 B-B line in FIG. 1;

[0062] Figure 9 is a left view of the top cover assembly shown in Figure 5

[0063] Figure 10 is a plan view of the first insulating member shown in Figure 5

[0064] Figure 11 is a structural schematic view of a top cover assembly of a battery cell according to other embodiments of the present application;

[0065] Figure 12 is a plan view of the first insulating member shown in Figure 11

[0066] Figure 13 is a front view of the first insulating member shown in Figure 11

[0067] Figure 14 is a bottom view of the first insulating member shown in Figure 11

[0068] Figure 15 is a left view of the first insulating member shown in Figure 11

[0069] Reference Signs:

[0070] 1. An electric device;

[0071] 100. A battery device; 200. A controller; 300. A motor;

[0072] 10. A battery cell; 10a. A top cover assembly;

[0073] 11. A case; 101. A cavity; 111. A first wall; 112. A main case;

[0074] 12. A first insulating member; 121. A plate body; 1211. A pressure relief hole;

[0075] 122. A support platform; 1221. An exhaust passage; 1223. A support rib; 1224. A support portion;

[0076] 1225. A first plate; 1226. A second plate; 1227. A partition;

[0077] 13. A pressure relief structure; 14. A pole; 15. An electrode assembly;

[0078] ​​​​​​20, box body; 21, box main body; 22, cover body; Z, first direction; Y, second direction; X, third direction. DETAILED DESCRIPTION

[0079] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0080] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0081] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0082] In this paper, the reference to "embodiments" means that the specific features, structures or properties described in conjunction with the embodiments can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily mean the same embodiment, nor is it an independent or alternative embodiment to other embodiments. The skilled person in the art explicitly and implicitly understands that the embodiments described herein can be combined with other embodiments.

[0083] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship between the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents a "or" relationship between the front and rear associated objects.

[0084] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two).

[0085] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0086] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing", and the like should be broadly understood, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0087] The battery apparatus mentioned in the embodiments of the present application can include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly can include one or more battery cells, and when there are multiple, the multiple battery cells are connected in series, parallel or mixed connection through busbar components.

[0088] In some embodiments, the battery cell assembly is usually formed by arranging a plurality of battery cells; as an example, the battery cell assembly can be a battery module, and the battery module is formed by arranging and fixing a plurality of battery cells into an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells with a cable tie.

[0089] In some embodiments, the battery apparatus can be a battery pack, which includes a box body and one or more battery cell assemblies, and the battery cell assemblies are accommodated in the box body.

[0090] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be accommodated in the box body by fixing the battery module in the box body.

[0091] As an example, the battery cell assembly can also be accommodated in the box body by directly fixing a plurality of battery cells in the box body.

[0092] As an example, the box can include a first box and a second box. The first box and the second box are fastened so that an inside of the box forms a closed space to accommodate the battery cell assembly. The closed here means covered or closed, which can be sealed or unsealed. The first box can be a top cover or a bottom plate.

[0093] As an example, the box can include a top cover, a frame and a bottom plate. The top cover and the bottom plate are respectively connected with the frame so that an inside of the box forms a closed space to accommodate the battery cell assembly.

[0094] As an example, the box can be part of a chassis structure of a vehicle. For example, the top cover of the box can be at least part of a floor of the vehicle, or the frame of the box can be at least part of a cross beam and a longitudinal beam of the vehicle.

[0095] In some embodiments, the battery device refers to an energy storage device, and the energy storage device includes a box, at least one side of which is provided with a door. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0096] The battery cell mentioned in the embodiments of the present application can include a lithium ion secondary battery, a lithium ion primary battery, a lithium-sulfur battery, a sodium lithium ion battery, a sodium ion battery or a magnesium ion battery, etc., which is not limited by the embodiments of the present application. The battery cell can be in the shape of a cylinder, a flat body, a cuboid or other shapes, etc., which is also not limited by the embodiments of the present application. The battery cell is generally divided into three types according to the packaging method: cylindrical battery cell, square battery cell and soft package battery cell, which is also not limited by the embodiments of the present application.

[0097] As an example, the battery cell generally can include a shell, an electrode assembly and an electrolyte, the shell is used to accommodate the electrode assembly and the electrolyte, and the shell is provided with at least one positive pole and at least one negative pole. The electrode assembly includes one or more electrode assemblies, and the electrode assembly is formed by stacking or winding a positive electrode sheet, a negative electrode sheet and a separator film.

[0098] Among them, the positive electrode sheet generally can include a positive electrode current collector and a positive electrode active material layer, the positive electrode active material layer is directly or indirectly coated on the positive electrode current collector, the positive electrode current collector without the positive electrode active material layer protrudes from the positive electrode current collector with the positive electrode active material layer, and the positive electrode current collector without the positive electrode active material layer serves as a positive electrode tab sheet, and a plurality of positive electrode tab sheets are stacked together and electrically connected with the positive pole. As an example, the plurality of positive electrode tab sheets stacked together can be directly welded to the positive pole to form an electrical connection; or the electrode assembly can further include a positive electrode adapter sheet, the plurality of positive electrode tab sheets are welded to one end of the positive electrode adapter sheet, and the other end of the positive electrode adapter sheet is welded to the positive pole, so that the positive electrode tab sheet and the positive pole form an electrical connection.

[0099] The negative electrode tab can generally include a negative electrode current collector and a negative electrode active material layer, the negative electrode active material layer being coated directly or indirectly on the negative electrode current collector, the negative electrode current collector without the negative electrode active material layer protruding from the negative electrode current collector with the negative electrode active material layer, the negative electrode current collector without the negative electrode active material layer serving as a negative electrode tab, and a plurality of negative electrode tabs being stacked together and electrically connected to the negative electrode post. For example, the plurality of negative electrode tabs stacked together can be directly welded to the negative electrode post to form an electrical connection; or the battery cell assembly can further include a negative electrode adapter plate, the plurality of negative electrode tabs stacked together being welded to one end of the negative electrode adapter plate, and the other end of the negative electrode adapter plate being welded to the negative electrode post, so that the negative electrode tabs are electrically connected to the negative electrode post. The material of the separator is not limited, for example, it can be polypropylene or polyethylene, etc.

[0100] At the same time, the battery cell mainly relies on the movement of metal ions between the positive electrode tab and the negative electrode tab to work. For example, in a lithium ion battery, the material of the positive electrode current collector can be aluminum, the material of the positive electrode active material layer can be lithium cobaltate, lithium iron phosphate, ternary lithium or lithium manganate, etc., the material of the negative electrode current collector can be copper, and the material of the negative electrode active material layer can be carbon or silicon, etc. During charging and discharging, Li+ moves back and forth between the two electrodes: when charging, Li+ is deintercalated from the positive electrode, inserted into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; when discharging, the opposite is true.

[0101] The technical solutions described in the embodiments of the present application are applicable to various electric devices using battery cells and battery devices, for example, mobile phones, portable devices, notebook computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, etc., for example, spacecraft including airplanes, rockets, space shuttles and spacecraft, etc.

[0102] In recent years, new energy vehicles have made a leap in development. In the field of electric vehicles, battery devices play an irreplaceable important role as the power source of electric vehicles. Among them, battery devices as core components of new energy vehicles have high requirements in terms of energy density and reliability.

[0103] With the increasing demand for battery energy density and the increasing diversification of application scenarios, the optimization and safety of the internal structure of the battery cells of the battery device have become a key research direction.

[0104] The battery cell in the related art is provided with an electrode assembly and a first insulating piece (lower plastic) in the shell of the battery cell, and the first insulating piece is supported between the electrode assembly and the end cover of the shell. However, the first insulating piece is prone to deformation when subjected to pressure between the electrode assembly and the end cover, and local buckling or depression phenomenon occurs, which seriously damages the originally stable structure inside the battery cell, causes insulation risk, threatens the use safety of the battery cell, and the deformed first insulating piece is easy to block the ventilation channel in the shell, causing difficulty in pressure relief.

[0105] Based on the above considerations, in order to reduce the probability of deformation of the first insulating piece when subjected to pressure and increase the ventilation area in the shell of the battery cell, the application designs a battery cell, which is provided with a first insulating piece in the shell of the battery cell, and a plurality of support ribs are arranged on the support table of the first insulating piece. The plurality of support ribs can improve the structural strength of the support table, reduce the probability of deformation of the support table when subjected to pressure, enable the support table to be stably supported between the electrode assembly and the first wall, improve the stability of the internal structure of the battery cell, and improve the insulation performance inside the battery cell. At the same time, the plurality of support ribs of the support table define an exhaust channel through the support table along the second direction. Since the support table can be stably supported between the electrode assembly and the first wall, the exhaust channel can stably communicate the spaces on both sides of the support table in the second direction. When gas is generated inside the battery cell, when the gas flows to the end portion of the shell provided with the first insulating piece, the gas can pass through the exhaust channel to reach the position of the pressure relief hole, and then can be discharged to the outside of the shell through the pressure relief structure, improving the pressure relief efficiency and reducing the risk of out-of-control of the battery cell.

[0106] The application embodiment provides a power consumption device using the battery cell of the application as a power supply. The power consumption device can be, but is not limited to, a mobile phone, a tablet computer, a notebook computer, an electric toy, an electric tool, an electric car, an electric vehicle, a ship, a spacecraft, etc. The electric toy can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric plane toys, etc. The spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0107] The following embodiments take the power consumption device 1 as a vehicle as an example to introduce the structure of the power consumption device 1, the battery device 100, and the battery cell 10 and the first insulating piece 12 in detail.

[0108] Please refer to Figure 1 , Figure 1The power utilization device 1 provided in some embodiments of the present application is a structural schematic diagram of a vehicle. The vehicle can be a fuel automobile, a gas automobile, or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid automobile, or a range extended automobile, etc. The vehicle is provided with a battery device 100, which can be arranged at the bottom, the head, or the tail of the vehicle. The battery device 100 can be used for power supply of the vehicle, for example, the battery device 100 can be used as an operating power source of the vehicle. The vehicle can further include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power demand of the vehicle during starting, navigation, and driving. In some embodiments of the present application, the battery device 100 can not only be used as an operating power source of the vehicle, but also be used as a driving power source of the vehicle, to replace or partially replace fuel or natural gas to provide driving power for the vehicle.

[0109] Please refer to Figure 2 , Figure 2 The structural explosion diagram of the battery device 100 provided in some embodiments of the present application is shown. The battery device 100 includes a box body 20 and a plurality of battery monomers 10, and the box body 20 is used to provide an assembly space for the battery monomers 10, and the battery monomers 10 are contained in the box body 20.

[0110] Please refer to Figure 3 , Figure 3 The structural schematic diagram of the battery monomer 10 provided in some embodiments of the present application is shown. The battery monomer 10 is a cuboid, and the height direction of the battery monomer 10 is a first direction Z, the length direction of the battery monomer 10 is a second direction Y, and the thickness direction of the battery monomer 10 is a third direction X. The first direction Z, the second direction Y, and the third direction X are perpendicular to each other. However, it is not limited to this, and in other embodiments of the present application, the battery monomer 10 can also be a cylinder, a flat body, or other shapes, etc.

[0111] Figure 4 is a sectional view along the line A-A in Figure 3 Figure 5 is a top view of a top cover assembly 10a of the battery monomer 10 according to some embodiments of the present application; Figure 6 is a front view of the top cover assembly 10a shown in Figure 5 Figure 7 is a bottom view of the top cover assembly 10a shown in Figure 5 Figure 8 is a sectional view along the line B-B in Figure 7 Figure 9 is a left view of the top cover assembly 10a shown in Figure 5 Figure 10 is a schematic diagram of the first insulating member 12 shown in Figure 5 Figure 11 ​​​​​​is a structural schematic view of a top cover assembly 10a of a battery monomer 10 according to another embodiment of the present application; Figure 12 is Figure 11 is a top view of the first insulation 12 shown in Figure 13 is Figure 11 is a front view of the first insulation 12 shown in Figure 14 is Figure 11 is a bottom view of the first insulation 12 shown in Figure 15 is Figure 11 is a left view of the first insulation 12 shown in

[0112] The battery monomer 10 according to the first aspect of the present application is described below with reference to Figures 3-15 The battery monomer 10 according to the first aspect of the present application is described below with reference to

[0113] The battery monomer 10 according to the first aspect of the present application is described below with reference to Figure 3 and Figure 4 The battery monomer 10 according to the first aspect of the present application is described below with reference to

[0114] The battery monomer 10 according to the first aspect of the present application is described below with reference to Figures 5-10 The first insulation 12 includes a plate body 121 and a support platform 122, the plate body 121 is formed with a pressure relief hole 1211 penetrating the plate body 121 along a first direction Z, the pressure relief hole 1211 is in communication with the pressure relief structure 13, the support platform 122 is connected to both ends of the plate body 121 in a second direction Y and protrudes from a side surface of the plate body 121 away from the first wall 111 in the first direction Z, the first direction Z is the thickness direction of the plate body 121, and the second direction Y is the length direction of the plate body 121, wherein the support platform 122 includes a plurality of support ribs 1223, the plurality of support ribs 1223 cooperatively define a plurality of exhaust channels 1221, the plurality of exhaust channels 1221 all penetrate the support platform 122 along the second direction Y and are in communication with the pressure relief hole 1211.

[0115] The battery monomer 10 according to the first aspect of the present application is described below with reference to Figure 4 and Figure 5 The battery monomer 10 according to the first aspect of the present application is described below with reference to

[0116] The first wall 111 is configured to lead out the electrode of the battery cell 10. Specifically, the first wall 111 is provided with a pole 14 mounting hole, and one end of the pole 14 of the battery cell 10 extends into the cavity 101 through the pole 14 mounting hole and is connected to the electrode assembly 15 in the cavity 101. When the shell 11 has one first wall 111, the positive pole 14 and the negative pole 14 of the battery cell 10 are arranged on the same side of the shell 11 in the first direction Z. When the shell 11 has two oppositely arranged first walls 111, the positive pole 14 and the negative pole 14 of the battery cell 10 are arranged on opposite sides of the shell 11 in the first direction Z, respectively.

[0117] As shown in Figure 5 The pressure relief structure 13 is configured to release the pressure in time when the internal pressure of the battery cell 10 rises suddenly due to abnormal conditions such as thermal runaway, so as to ensure the safe operation of the battery cell 10. In some examples, the pressure relief structure 13 can be an explosion-proof valve, and the pressure relief structure 13 can also be a structural weak area on the first wall 111, which can be formed with a notch or etching.

[0118] The shell 11 has two second walls oppositely arranged in the second direction Y, and the shell 11 also has two third walls oppositely arranged in the third direction X, which is the width direction of the plate body 121 and also the thickness direction of the battery cell 10.

[0119] It should be noted that the pole piece of the electrode assembly 15 in the battery cell 10 is usually arranged in layers along the third direction X, and the electrode assembly 15 will swell in the battery cell 10, and the plurality of battery cells 10 of the battery device 100 are usually arranged in layers along the third direction X. Therefore, the two third walls of the shell 11 are closely attached to the two side surfaces of the electrode assembly 15 in the third direction X, and the gas in the shell 11 cannot flow from between the third wall and the electrode assembly 15 to the pressure relief hole 1211.

[0120] Therefore, in order to facilitate the smooth flow of the gas inside the shell 11 towards the pressure relief hole 1211 and the pressure relief structure 13, a gap is formed between the two second walls of the shell 11 and the electrode assembly 15 to form a ventilation passage, or a gas exhaust structure is provided between the second wall and the electrode assembly 15, and the gas exhaust structure is formed with a ventilation passage extending along the first direction Z. The ventilation passage is configured to guide the gas generated inside the shell 11 to one end or both ends of the shell 11 in the first direction Z, so that the gas can be discharged from the pressure relief hole 1211 and the pressure relief structure 13.

[0121] The first insulation member 12 is arranged in the cavity 101 and between the electrode assembly 15 and the first wall 111, and is used to fix the electrode assembly 15 and isolate the electrode assembly 15 from the first wall 111. In some examples, the first insulation member 12 is a plastic member, for example, a polyvinyl chloride member or a polypropylene member. In some examples, the first insulation member 12 is adapted to abut between the first wall 111 and the electrode assembly 15 in the first direction Z, and an arrangement space of the tab and the adapter tab of the electrode assembly 15 is also defined between the first insulation member 12 and the electrode assembly 15.

[0122] Specifically, as shown in Figure 6 and Figure 7 , the first insulation member 12 includes a plate body 121 and two support platforms 122. The plate body 121 is a rectangular plate body, and the two support platforms 122 are respectively connected to the two ends of the plate body 121 in the length direction, and the thickness of the support platforms 122 is greater than the thickness of the plate body 121. In some specific examples, the side surface of the support platform 122 facing the first wall 111 is flush with the side surface of the plate body 121 facing the first wall 111, and the support platform 122 protrudes from the side surface of the plate body 121 facing the electrode assembly 15. At this time, the support platform 122 is supported between the electrode assembly 15 and the first wall 111, and an arrangement space for arranging components such as tabs and adapter tabs is defined between the plate body 121 and the two support platforms 122.

[0123] Further, as shown in Figure 8 and Figure 9 , the support platform 122 can include a plurality of support ribs 1223, for example, the number of support ribs 1223 can be two, three, four, six, eight, ten, twelve, fifteen, twenty, twenty-five, or thirty or more, and the like. The plurality of support ribs 1223 can improve the structural strength of the support platform 122, improve the stability of the support of the support platform 122 between the electrode assembly 15 and the first wall 111, reduce the risk of deformation or crushing of the support platform 122 under pressure, thereby improving the stability of the internal structure of the battery monomer 10, ensuring the insulation performance inside the battery monomer 10, allowing the battery monomer 10 to operate stably, and improving the service life of the battery monomer 10.

[0124] Further, as shown in Figure 8 and Figure 9As shown, the plurality of support ribs 1223 of each support platform 122 cooperatively define a plurality of exhaust passages 1221, for example, the plurality of support ribs 1223 of each support platform 122 can cooperatively define two, three, four, six, eight, ten, twelve, fourteen, sixteen, eighteen, or twenty or more exhaust passages 1221. In some specific examples, the inlet of each exhaust passage 1221 penetrates through the side surface of the support platform 122 facing the second wall, and the outlet of the exhaust passage 1221 penetrates through the side surface of the support platform 122 facing the plate body 121 to communicate to the pressure relief hole 1211. The plurality of exhaust passages 1221 can increase the total flow cross-sectional area for exhaust within the support platform 122, improve the exhaust performance of the support platform 122, improve the exhaust efficiency, and reduce the risk of explosion caused by gas accumulation in the shell 11.

[0125] When the battery cell 10 is in operation, the gas generated in the shell 11 can be guided through the ventilation passage between the electrode assembly 15 and the second wall of the shell 11 to the area where the first insulating member 12 is located, i.e., to the side of the support platform 122 facing the second wall, and then the gas can enter the exhaust passage 1221, pass through the exhaust passage 1221, flow to the position of the pressure relief hole 1211, and finally be discharged from the shell 11 through the pressure relief structure 13.

[0126] The plurality of support ribs 1223 cooperatively define the plurality of exhaust passages 1221 in the present embodiment. Since the thickness of the support ribs 1223 is smaller than the rest of the support structure (e.g., the boss structure or the bump structure), the support ribs 1223 occupy less area in the projection plane perpendicular to the second direction Y, which can further increase the total flow cross-section of the plurality of exhaust passages 1221, further improve the exhaust efficiency and exhaust performance, and ensure the unobstructed exhaust within the battery cell 10. Moreover, since the plurality of support ribs 1223 separate to form the plurality of exhaust passages 1221, the cross-sectional area of each exhaust passage 1221 can be reduced, the blocking efficiency of high-temperature impurities such as aluminum molten beads ejected from the shell 11 can be improved, the probability of impurities reaching the position of the pressure relief hole 1211 and blocking the pressure relief hole 1211 can be reduced, and the risk of fire can be reduced.

[0127] In the above technical solution, the support platform 122 of the first insulating part 12 is provided with multiple support ribs 1223, which can improve the structural strength of the support platform 122, reduce the probability of deformation of the support platform 122 under pressure, and enable the support platform 122 to stably support between the electrode assembly 15 and the first wall 111, thereby ensuring the stability of the internal structure of the battery monomer 10 and the insulation performance inside the battery monomer 10. At the same time, the multiple support ribs 1223 of the support platform 122 define an exhaust passage 1221 through the support platform 122 along the second direction Y. Since the support platform 122 can be stably supported between the electrode assembly 15 and the first wall 111, the exhaust passage 1221 can stably communicate the spaces on both sides of the support platform 122 in the second direction Y. When gas is generated inside the battery monomer 10, when the gas flows to the end portion of the housing 11 where the first insulating part 12 is arranged, the gas can pass through the exhaust passage 1221 to reach the position of the pressure relief hole 1211, and then can be discharged to the outside of the housing 11 through the pressure relief structure 13, thereby improving the pressure relief efficiency and reducing the risk of out-of-control of the battery monomer 10.

[0128] In some embodiments of the present application, as shown in Figure 8 and Figure 9 The multiple support ribs 1223 extend along the second direction Y and are arranged in the third direction X, which is the width direction of the plate body 121.

[0129] In some examples, the support rib 1223 can extend in a straight line in the second direction Y, for example, the support rib 1223 can extend in a straight line parallel to the second direction Y, or the support rib 1223 can extend in a straight line arranged at an angle with the second direction Y, thereby simplifying the structure of the support rib 1223, facilitating processing, and improving processing efficiency. In some examples, the support rib 1223 can also extend in a curve and / or a broken line in the second direction Y to further strengthen the structural strength of the support platform 122.

[0130] In the above technical solution, the plurality of support ribs 1223 extend along the second direction Y and are arranged in the third direction X. When the support platform 122 is subjected to force, the plurality of support ribs 1223 can uniformly disperse the force in the width direction of the plate body 121, further enhancing the support stability of the support platform 122 between the first wall 111 and the electrode assembly 15, reducing the possibility of deformation caused by uneven local stress, and thus better maintaining the stability of the internal structure of the battery monomer 10. At the same time, the support ribs 1223 extend along the second direction Y and are arranged in the third direction X, so that the plurality of exhaust channels 1221 extend along the second direction Y and are arranged in the third direction X. Therefore, the plurality of exhaust channels 1221 can be more reasonably and uniformly distributed, and no matter where the gas inside the battery monomer 10 is generated or gathered, it can be efficiently discharged through the exhaust channel 1221, improving the pressure relief and exhaust efficiency and uniformity of the support platform 122, and further improving the reliability and stability of the battery monomer 10 in operation.

[0131] In some embodiments of the present application, as shown in Figure 8 and Figure 9 At least part of the plurality of support ribs 1223 is arranged obliquely relative to the first direction Z.

[0132] That is, some of the plurality of support ribs 1223 can be arranged obliquely relative to the first direction Z, or all of the plurality of support ribs 1223 can be arranged obliquely relative to the first direction Z.

[0133] For example, in the first direction Z, from the first insulating member 12 to the first wall 111, the plurality of support ribs 1223 all extend obliquely to one side of the first insulating member 12 in the width direction (for example, the third direction X shown in Figure 8 For example, in the first direction Z, from the first insulating member 12 to the first wall 111, the plurality of support ribs 1223 all extend obliquely to one side of the first insulating member 12 in the width direction (for example, the third direction X shown in

[0134] In the technical solution, at least part of the plurality of support ribs 1223 are arranged obliquely relative to the first direction Z. When the support platform 122 is subjected to pressure from different directions, the oblique support ribs 1223 can better decompose and resist pressure from different directions, reduce the probability of displacement of the first insulating member 12, enhance the support stability of the first insulating member 12 between the electrode assembly 15 and the first wall 111, improve the stability of the internal structure of the battery monomer 10, improve the insulation performance inside the battery monomer 10, and stably connect the plurality of exhaust channels 1221 to both sides of the support platform 122 in the second direction Y, improve the ventilation performance of the support platform 122, and improve the pressure relief efficiency.

[0135] In some embodiments of the present application, as shown in Figure 8 and Figure 9 The oblique directions of the two support ribs 1223 adjacent in the third direction X are different.

[0136] That is, the plurality of support ribs 1223 include a plurality of first ribs and a plurality of second ribs. In the direction from the first insulating member 12 to the first wall 111, the plurality of first ribs are obliquely extended to one side of the first insulating member 12 in the width direction, and the plurality of second ribs are obliquely extended to the other side of the first insulating member 12 in the width direction. In the third direction X, the plurality of first ribs and the plurality of second ribs are alternately arranged.

[0137] In the technical solution, by making the oblique directions of the two support ribs 1223 adjacent in the third direction X different, the support ribs 1223 with different oblique directions can cooperate with each other. When the support platform 122 is subjected to pressure at any position, the support ribs 1223 with different oblique directions can effectively decompose and buffer the pressure, further enhancing the overall stability of the first insulating member 12, reducing the probability of local pressure being too large to cause deformation, better maintaining the structural integrity inside the battery monomer 10, and improving the exhaust efficiency.

[0138] In some embodiments of the present application, as shown in Figure 8 and Figure 9 In the direction from the first insulating member 12 to the first wall 111, the two support ribs 1223 adjacent and extending in opposite directions are connected and constitute a support part 1224. At least part of the plurality of support ribs 1223 form a plurality of support parts 1224.

[0139] For example, the number of the plurality of support ribs 1223 is 2N, and each two support ribs 1223 can form a support part 1224. For example, the 2N support ribs 1223 can form N support parts 1224, or for example, the 2N support ribs 1223 can form M support parts 1224, where N is a positive integer, and M is a positive integer less than N. At this time, a part of the support ribs 1223 does not form a support part 1224 with the adjacent support rib 1223.

[0140] In the above technical solution, the two support ribs 1223 adjacent to and extending towards each other are connected to form a support part 1224. At this time, the support part 1224 can be in the shape of an arch, a triangle, or a trapezoid. A plurality of support parts 1224 can form a plurality of support structures in the shape of an arch or a triangle. In this way, the compression resistance of the support table 122 can be further enhanced, the probability of deformation of the support table 122 caused by pressure concentration can be further reduced, and the insulation risk caused by structural deformation can be reduced. At the same time, the higher-strength support part 1224 can make the structure of the exhaust passage 1221 more stable, thereby ensuring the ventilation performance in the battery monomer 10, so that the pressure relief process can be smoothly performed.

[0141] In some embodiments of the present application, as shown in Figure 8 and Figure 9 , the two support ribs 1223 in the support part 1224 are connected in an arc shape.

[0142] Specifically, at the connection position of the two support ribs 1223 of the support part 1224, the two surfaces of the two support ribs 1223 arranged towards each other in the third direction X are connected in an arc shape, and the two surfaces of the two support ribs 1223 arranged away from each other in the third direction X are connected in an arc shape.

[0143] In the above technical solution, the two support ribs 1223 in the support part 1224 are connected in an arc shape. This can make the stress smoothly transition at the connection position of the two support ribs 1223, reduce the stress concentration point at the connection position of the two support ribs 1223, make the connection position better withstand and disperse the pressure, and enhance the compression resistance of the support part 1224 as a whole. At the same time, the arc connection of the two support ribs 1223 can make the inner wall of the exhaust passage 1221 smooth, reduce the flow resistance of the gas in the exhaust passage 1221, and improve the exhaust efficiency of the exhaust passage 1221.

[0144] In some embodiments of the present application, as shown in Figure 8 and Figure 9 , the plurality of support parts 1224 are sequentially connected in the third direction X.

[0145] That is, in the third direction X, the two support ribs 1223 adjacent to each other in the adjacent support part are connected.

[0146] In some examples, the plurality of support ribs 1223 are sequentially connected in the third direction X.

[0147] In the above technical solution, the plurality of support portions 1224 are sequentially connected in the third direction X, which can connect the plurality of support portions 1224 as a whole, enhance the overall performance of the plurality of support portions 1224, further enhance the overall structural strength of the plurality of support portions 1224, further improve the overall compression resistance of the plurality of support portions 1224, further reduce the deformation risk of the support table 122, and further ensure the ventilation performance of the support table 122.

[0148] In some embodiments of the present application, as shown in Figure 8 and Figure 9 In the third direction X, the two surfaces of the adjacent two support portions 1224 arranged opposite each other are connected by an arc.

[0149] In the above technical solution, by connecting the two surfaces of the adjacent two support portions 1224 arranged opposite each other by an arc, the stress at the connection position of the adjacent support portions 1224 can be dispersed, the stress concentration at the connection position can be reduced, and the reliability and durability of the connection position can be improved. At the same time, when the exhaust passage 1221 is formed between the adjacent support portions 1224, the arc connection of the two support portions 1224 can make the inner wall of the exhaust passage 1221 smooth, reduce the flow resistance of the gas in the exhaust passage 1221, and improve the exhaust efficiency of the exhaust passage 1221.

[0150] In some embodiments of the present application, as shown in Figure 8 and Figure 9 The plurality of support portions 1224 are formed as an integral part.

[0151] That is, the support structure composed of the plurality of support portions 1224 is integrally formed. The support structure composed of the plurality of support portions 1224 can be an independent component, and when assembled, the support structure composed of the plurality of support portions 1224 can be assembled into the main structure of the support table 122. In some examples, the support structure composed of the plurality of support portions 1224 can be fixedly connected to the main structure of the support table 122 by bonding or heat staking.

[0152] In the above technical solution, the plurality of support portions 1224 are formed as an integral part, which can enhance the integrity of the plurality of support portions 1224, reduce the number of components, improve the assembly efficiency, and in addition, when the plurality of support portions 1224 are integrally formed as independent components, the structure of the first insulating part 12 can be simplified, and the processing difficulty can be reduced.

[0153] In some embodiments of the present application, as shown in Figures 8-10As shown, the support platform 122 further comprises a first plate 1225 arranged perpendicularly to the first direction Z, and a plurality of support ribs 1223 are connected to the first plate 1225 and located on a side of the first plate 1225 facing the first wall 111, and the first plate 1225 cooperates with the plurality of support ribs 1223 to define at least part of the plurality of exhaust channels 1221.

[0154] In some examples, the first plate 1225 is a flat plate and has a rectangular shape, so as to simplify the structure of the first plate 1225 and facilitate processing.

[0155] In some examples, all the exhaust channels 1221 in the support platform 122 are defined by the first plate 1225 cooperating with the plurality of support ribs 1223. In other examples, part of the exhaust channels 1221 in the support platform 122 are defined by the first plate 1225 cooperating with the plurality of support ribs 1223, and the other part of the exhaust channels 1221 can be defined by the plurality of support ribs 1223 cooperating with other structures (for example, the partition plate 1227 and / or the second plate 1226 described below).

[0156] In the above technical solutions, the first plate 1225 is arranged perpendicularly to the first direction Z, and the plurality of support ribs 1223 are connected to the first plate 1225, which can further improve the structural strength of the support platform 122, enhance the integrity of the plurality of support ribs 1223, improve the compression resistance of the support platform 122, reduce the probability of deformation of the support platform 122, make the internal structure of the battery monomer 10 more stable, and make the ventilation performance of the support platform 122 more stable and reliable.

[0157] In some embodiments of the present application, as shown in Figures 8-10 The plurality of support ribs 1223 extend along the first direction Z, and in the first direction Z, the side edges of the plurality of support ribs 1223 facing the first wall 111 do not exceed the side surface of the plate body 121 facing the first wall 111.

[0158] For example, in the first direction Z, the side edge of the plurality of support ribs 1223 facing the first wall 111 is flush with the surface of the plate body 121 facing the first wall 111. At this time, the end face of the plurality of support ribs 1223 facing the first wall 111 can be coplanar with the surface of the plate body 121 facing the first wall 111, so that the first insulation piece 12 can be attached to the first wall 111 together with the plurality of support ribs 1223 and the plate body 121. Thus, the contact area between the first insulation piece 12 and the first wall 111 can be increased, and when the first insulation piece 12 is subjected to pressure, the pressure can be uniformly transmitted to the plate body 121 and the plurality of first support ribs 1223, reducing the probability of local pressure being too high and the probability of deformation of the first insulation piece 12, and improving the stability of the internal structure of the battery monomer 10. In addition, the height of the support rib 1223 can be increased, the cross-sectional area of the exhaust passage 1221 can be increased, and the ventilation performance of the plurality of exhaust passages 1221 in the support platform 122 can be further improved.

[0159] For another example, in the first direction Z, the height of the plurality of support ribs 1223 is lower than the distance between the first plate 1225 and the side surface of the plate body 121 facing the first wall 111. In this way, the support rib 1223 can not protrude from the plate body 121, reducing the occupied space of the support rib 1223 and reducing the probability of interference between the support rib 1223 and other components.

[0160] In the above technical solution, the side edge of the plurality of support ribs 1223 facing the first wall 111 does not exceed the side surface of the plate body 121 facing the first wall 111, which can facilitate the first insulation piece 12 to abut against the first wall 111 through the plate body 121 or through the plate body 121 and the plurality of support ribs, increase the contact area between the first insulation piece 12 and the first wall 111, reduce the probability of local pressure being too high, reduce the probability of deformation of the first insulation piece 12, improve the stability of the internal structure of the battery monomer 10, and also make the support rib 1223 not protrude from the plate body 121, reduce the occupied space of the support rib 1223, and reduce the probability of interference between the support rib 1223 and other components.

[0161] In some embodiments of the present application, as shown in Figure 11 The support platform 122 further includes a second plate 1226 arranged on the side of the first plate 1225 facing the first wall 111, and the plurality of support ribs 1223 are arranged between the first plate 1225 and the second plate 1226. The side surface of the second plate 1226 facing the first wall 111 is flush with the side surface of the plate body 121 facing the first wall 111.

[0162] In some embodiments, the plurality of support ribs 1223 can be connected between the first plate 1225 and the second plate 1226 to further improve the structural strength of the support platform 122.

[0163] In some embodiments, one end of the plurality of support ribs 1223 is connected to the first plate 1225 and the other end is spaced apart from the second plate 1226 in the first direction Z. In this way, the height of the support ribs 1223 can be reduced, the amount of material can be reduced, and the projection area of the support ribs 1223 in the projection plane perpendicular to the second direction Y can be reduced, the total ventilation cross-sectional area of the exhaust passage 1221 in the support platform 122 can be increased, and the ventilation performance of the support platform 122 can be improved.

[0164] In some embodiments, the side surface of the second plate 1226 facing the first wall 111 is coplanar with the side surface of the plate body 121 facing the first wall 111, so that the first insulation member 12 can be attached to the first wall 111 by the second plate 1226 and the plate body 121 together. In this way, the contact area between the first insulation member 12 and the first wall 111 can be increased, and when the first insulation member 12 is subjected to pressure, the pressure can be uniformly transmitted to the plate body 121 and the two second plates 1226, the probability of local pressure being too high can be reduced, the probability of the first insulation member 12 being deformed can be reduced, and the stability of the internal structure of the battery monomer 10 can be improved.

[0165] In the above technical solution, the support platform 122 further comprises the second plate 1226, and the plurality of support ribs 1223 are arranged between the first plate 1225 and the second plate 1226. The second plate 1226 can further improve the structural strength of the support platform 122, enhance the integrity of the plurality of support ribs 1223, improve the compression resistance of the support platform 122, and reduce the probability of deformation of the support platform 122. At the same time, the side surface of the second plate 1226 facing the first wall 111 is flush with the side surface of the plate body 121 facing the first wall 111, so that the first insulation member 12 can be attached to the first wall 111 by the second plate 1226 and the plate body 121 together, the probability of local pressure being too high can be reduced, and the probability of the first insulation member 12 being deformed can be reduced. In this way, the stability of the internal structure of the battery monomer 10 can be improved, and the ventilation performance of the support platform 122 can be more stable and reliable.

[0166] In some embodiments of the present application, as shown in Figures 10-11 The support platform 122 further comprises two partition plates 1227 connected to the first plate 1225 and arranged on the side of the first plate 1225 facing the first wall 111, the two partition plates 1227 are spaced apart in the third direction X, and the plurality of support ribs 1223 are arranged between the two partition plates 1227.

[0167] In some examples, the two partitions 1227 can be flat plates arranged perpendicularly to the third direction X, and the two partitions 1227 are arranged in parallel and at intervals, and the two partitions 1227 and the first plate 1225 can cooperate to enclose a support cavity which is open at the top and on both sides in the second direction Y, or the two partitions 1227 and the first plate 1225 and the second plate 1226 can cooperate to enclose a support cavity which is open on both sides in the second direction Y, and the plurality of support ribs are arranged in the support cavity. In this way, the two partitions 1227 and the first plate 1225 can form a stable frame structure, or the two partitions 1227, the first plate 1225 and the second plate 1226 can form a stable frame structure, and the support ribs 1223 are supported in the frame structure, so that the structural strength of the support table 122 can be further improved.

[0168] In the above technical solution, the two partitions 1227 can further improve the structural strength of the support table 122 and reduce the probability of deformation of the support table 122. The partitions 1227 can also form exhaust channels 1221 between adjacent support ribs 1223, so that the number of exhaust channels 1221 can be further increased, the total flow cross-sectional area of the plurality of exhaust channels 1221 in the support table 122 can be increased, and the ventilation performance of the support table 122 can be improved.

[0169] In some embodiments of the present application, as shown in Figure 10 In the first direction Z, the side edge of the partition 1227 facing the first wall 111 is flush with the surface of the plate body 121 facing the first wall 111.

[0170] For example, the end face of the partition 1227 facing the first wall 111 can be coplanar with the surface of the plate body 121 facing the first wall 111. In this way, when the first insulation member 12 abuts against the first wall 111, the two partitions 1227 and the plate body 121 jointly fit the first wall 111, so that the contact area between the first insulation member 12 and the first wall 111 can be increased. When the first insulation member 12 is subjected to pressure, the pressure can be uniformly transmitted to the plate body 121 and the two partitions 1227, the probability of local overpressure can be reduced, the probability of deformation of the first insulation member 12 can be reduced, and the stability of the internal structure of the battery monomer 10 can be improved.

[0171] In the above technical solution, the side edge of the partition 1227 facing the first wall 111 is flush with the surface of the plate body 121 facing the first wall 111, so that the partition 1227 and the plate body 121 can jointly bear the pressure received by the first insulation member 12, the probability of local stress concentration can be reduced, the probability of deformation of the first insulation member 12 can be reduced, the stability of the internal structure of the battery monomer 10 can be improved, and the ventilation performance of the plurality of exhaust channels 1221 can be ensured.

[0172] In some embodiments of the present application, as shown inFigure 8 , Figure 9 and Figure 11 As shown, multiple support ribs 1223 form multiple support portions 1224. Each support portion 1224 includes two adjacent support ribs 1223 in a third direction X. The two support ribs 1223 of each support portion 1224 are connected at one end facing the first wall 111. An exhaust channel 1221 is formed between the support portion 1224 and the first plate 1225, and / or, the exhaust channel 1221 is formed between two adjacent support portions 1224.

[0173] Two support ribs 1223 are connected to form a support part 1224. The two support ribs 1223 can support each other, further improving the structural strength and stability of the support part 1224. Furthermore, the support part 1224 can more effectively disperse stress and reduce the probability of deformation of the first insulating member 12.

[0174] In some examples, the first direction Z is the vertical direction, the first plate 1225 is horizontally positioned, and the support portion 1224 is connected to the first plate 1225 and located on the upper side of the first plate 1225. The exhaust channel 1221 may be formed only between the lower surface of the support portion 1224 and the upper surface of the first plate 1225. Alternatively, the exhaust channel 1221 may be formed only in the upper region of the support portion 1224; for example, the exhaust channel 1221 may be formed between the upper surface of the support portion 1224 and the first wall 111, or between the upper surface of the support portion 1224 and the lower surface of the second plate 1226. Furthermore, exhaust channels 1221 may be formed on both the upper and lower sides of the support portion 1224.

[0175] In the above technical solution, by forming multiple support parts 1224 and forming exhaust channels 1221 on one or both sides of the support parts 1224 in the thickness direction, the structural strength of the support platform 122 can be improved, the risk of deformation can be reduced, and a stable exhaust channel 1221 structure can be formed, reducing the risk of the exhaust channel 1221 being crushed and deformed, and ensuring the ventilation performance of the exhaust channel 1221.

[0176] In some embodiments of this application, such as Figure 10 As shown, the support platform 122 extends from one end of the plate body 121 in the third direction X to the other end, where the third direction X is the width direction of the plate body 121.

[0177] In the technical solution, the support platform 122 extends from one end to the other end of the plate body 121 in the third direction X, which can increase the length of the support platform 122 in the third direction X, and the support platform 122 can uniformly support between the first wall 111 and the electrode assembly 15 in the third direction X, so that the first insulating member 12 can be uniformly stressed in the third direction X, the probability of deformation of the first insulating member 12 is reduced, and the ventilation performance of the exhaust passage 1221 is ensured.

[0178] In some embodiments of the present application, as shown in Figure 10 In the third direction X, the two side edges of the support platform 122 are flush with the two side edges of the plate body 121, respectively.

[0179] For example, the two end faces of the support platform 122 in the third direction X are flush with the two side end faces of the plate body 121 in the third direction X, respectively.

[0180] In the technical solution, the two side edges of the support platform 122 in the third direction X are flush with the two side edges of the plate body 121, respectively, which can uniformly distribute the support force of the first insulating member 12 in the third direction X, effectively prevent the edge of the plate body 121 from deforming, and also can make the support platform 122 not occupy additional space beyond the plate body 121 in the third direction X, compact structure, reduce space waste, and improve the energy density of the battery monomer 10.

[0181] In some embodiments of the present application, as shown in Figure 9 and Figure 11 The inlet and outlet of the exhaust passage 1221 respectively pass through the two end faces of the support platform 122 in the second direction Y, and the outlet of the exhaust passage 1221 is located on the side of the plate body 121 away from the first wall 111 in the first direction Z.

[0182] In some examples, the exhaust passage 1221 extends in a straight line parallel to the second direction Y in the second direction Y and penetrates the two end faces of the support platform 122. Thus, the structure of the exhaust passage 1221 can be simplified, and the processing and molding of the exhaust passage 1221 can be facilitated.

[0183] In some examples, the exhaust passage 1221 is completely located on the side of the plate body 121 facing the electrode assembly 15. Thus, the exhaust passage 1221 can be conveniently arranged, and the probability of interference between the plate body 121 and the outlet of the exhaust passage 1221 is reduced. Moreover, the molding of the exhaust passage 1221 does not need to make the support platform 122 protrude from the plate body 121 on the side facing the first wall 111, so that the surface of the plate body 121 and the support platform 122 facing the first wall 111 can be flush, thereby reducing the occupied space of the first insulating member 12 in the battery monomer 10, compact structure, and improving the energy density of the battery monomer 10.

[0184] In the technical solution, the outlet of the exhaust passage 1221 is located on the side of the plate body 121 away from the first wall 111 in the first direction Z, which facilitates the molding of the exhaust passage 1221 without occupying additional space on the side of the plate body 121 facing the first wall 111, reduces the occupied space of the first insulating member 12 in the battery monomer 10, and improves the energy density of the battery monomer 10.

[0185] In some embodiments of the present application, the support table 122 is a polyimide member, a polyetheramine member, an aluminum nitride member, or an aluminum and polyimide composite material member; or, the first insulating member 12 is a polyimide member, a polyetheramine member, an aluminum nitride member, or an aluminum and polyimide composite material member.

[0186] In some embodiments, the support table 122 is a polyimide member, or the first insulating member 12 is a polyimide member, which has good insulation performance, high-temperature resistance, and chemical stability, can effectively reduce the probability of internal short circuit of the battery monomer 10, and can adapt to the heat environment of the battery monomer 10 during operation, so that the first insulating member 12 is not corroded in a complex chemical environment such as electrolyte, thereby stably supporting between the end cover and the electrode assembly 15 and ensuring safe operation of the battery monomer 10.

[0187] In some embodiments, the support table 122 is a polyetheramine member, or the first insulating member 12 is a polyetheramine member, which can enhance structural toughness, buffer stress received in the battery monomer 10, and reduce the risk of damage to the first insulating member 12.

[0188] In some embodiments, the support table 122 is an aluminum nitride member, or the first insulating member 12 is an aluminum nitride member, which has high thermal conductivity and can quickly conduct heat generated by the battery monomer 10, so that the temperature distribution in the battery monomer 10 is more uniform, local overheating is avoided, and the cycle life of the battery monomer 10 is prolonged.

[0189] In some embodiments, the support table 122 is an aluminum and polyimide composite material member, or the first insulating member 12 is an aluminum and polyimide composite material member, which has the advantages of high thermal conductivity of aluminum and insulation of polyimide, so that efficient heat dissipation and electrical insulation can be achieved, the comprehensive performance of the battery monomer 10 is optimized, and the operation reliability of the battery monomer 10 is improved.

[0190] In the technical solution, the support table 122 or the first insulating member 12 is a polyimide member, a polyetheramine member, an aluminum nitride member, or an aluminum and polyimide composite material member, which can improve the insulation performance and high-temperature resistance of the first insulating member 12 and improve the stability and reliability of the operation of the battery monomer 10.

[0191] In some embodiments of the present application, as shown in Figures 12-15 The first insulation piece 12 is integrally formed.

[0192] In the above technical solution, the first insulation piece 12 is integrally formed, which can reduce the number of components in the battery monomer 10, enhance the integrity and structural strength of the first insulation piece 12, and improve the insulation performance of the first insulation piece 12.

[0193] In some embodiments of the present application, as shown in Figure 4 The shell 11 includes a main shell 112 and an end cover, the main shell 112 is open at least one side in the first direction Z, the end cover covers the open side of the main shell 112 and cooperates with the main shell 112 to define the cavity 101, and at least one end cover is formed as the first wall 111.

[0194] In some examples, as shown in Figure 4 The shell 11 can be a rectangular parallelepiped shape, and the shell 11 can also be a cylindrical shape.

[0195] In some examples, as shown in Figure 4 The main shell 112 can be formed in a shape open at one end and closed at the other end in the first direction Z, and the number of end covers is one and seals the open end of the main shell 112. The main shell 112 can also be formed in a shape open at both ends in the first direction Z, and the number of end covers is two and covers the two open ends of the main shell 112, respectively. The present embodiment can facilitate the installation and layout of the internal components of the battery monomer 10 by making the main shell 112 open at least one side in the first direction Z, and facilitate the maintenance, replacement or upgrading of the internal components, etc., which can reduce the maintenance cost and difficulty.

[0196] In some examples, as shown in Figure 4 The electrode assembly 15 is arranged in the shell 11, and the electrode assembly 15 can include a plurality of pole pieces arranged in layers, or the electrode assembly 15 can be wound and formed by a positive pole piece, a negative pole piece and a separator, wherein the wound and formed electrode assembly 15 can be cylindrical, and the cross section of the wound and formed electrode assembly 15 can also be a rectangle with rounded corners. In some examples, the number of electrode assemblies 15 can be one or more. For example, the number of electrode assemblies 15 is two, and the two electrode assemblies 15 are arranged side by side in the third direction X.

[0197] In some embodiments, as shown in Figure 4As shown, the battery monomer 10 includes a top cover assembly 10a, a main shell 112, an electrode assembly 15 and an insulating film. The main shell 112 defines a cavity 101 open on one side in the first direction Z, the top cover assembly 10a covers the open side of the main shell 112, the electrode assembly 15 is arranged in the cavity 101, the insulating film is wrapped on the outer side of the electrode assembly 15, the adapter plate is arranged on the side of the electrode assembly 15 facing the top cover assembly 10a, and is connected with the tab of the electrode assembly 15.

[0198] As shown in Figures 5-9 The top cover assembly 10a includes an end cover, a first insulating piece 12, a pole 14, an adapter plate, a second insulating piece, a sealing ring, a riveting block, a pressure relief structure 13 and a sealing nail. Specifically, the end cover is arranged perpendicular to the first direction Z, and the end cover is provided with two pole 14 mounting holes and one explosion-proof valve mounting hole arranged at intervals along the second direction Y, the explosion-proof valve mounting hole is arranged between the two pole 14 mounting holes, and the end cover is further formed with a liquid injection hole.

[0199] The first insulating piece 12 is arranged on the side of the end cover facing the electrode assembly 15, and the first insulating piece 12 is formed with two first perforations arranged at intervals, the two first perforations are respectively opposite and communicated with the two pole 14 mounting holes, and the first insulating piece 12 is further formed with a first through hole, which is opposite and communicated with the liquid injection hole.

[0200] The pole 14 is two, which are positive pole 14 and negative pole 14 respectively, and the pole 14 is arranged in the pole 14 mounting hole. The riveting block is arranged on the side of the end cover away from the electrode assembly 15, and the riveting block is annular, the riveting block is sleeved on the outer side of the pole 14 and fixedly connected with the pole 14. The second insulating piece is arranged on the side of the end cover away from the electrode assembly 15, and the second insulating piece is annular, and the second insulating piece is arranged between the pole 14 and the end cover. Further, the pole 14 and the periphery of the pole 14 mounting hole are provided with a sealing ring.

[0201] The pressure relief structure 13 is installed at the position of the explosion-proof valve mounting hole. At least part of the sealing nail is blocked in the liquid injection hole.

[0202] In the above technical scheme, by making the main shell 112 open on at least one side in the first direction Z, and covering the main shell 112 with the end cover, the shell 11 is divided into two parts, which can facilitate the installation and layout of the internal components of the battery monomer 10, and facilitate the maintenance, replacement or upgrading of the internal parts, thereby reducing the maintenance cost and difficulty. At the same time, the end cover is formed into the first wall 111, which can facilitate the arrangement of the pole 14 and the pressure relief structure 13 and other components, optimize the positional relationship between each part of the battery monomer 10, facilitate installation, and the structure is compact.

[0203] In a second aspect, the embodiments of the present application further provide a lower plastic, the lower plastic being the first insulation 12 in the battery cell 10 of any of the above embodiments.

[0204] Specifically, the lower plastic is arranged in the cavity 101 of the shell 11 of the battery cell 10, and the lower plastic includes a plate body 121 and a support platform 122, the plate body 121 is formed with a pressure relief hole 1211 penetrating the plate body 121 in a first direction Z, the pressure relief hole 1211 is in communication with the pressure relief structure 13 on the shell 11, the support platform 122 is connected to both ends of the plate body 121 in a second direction Y and protrudes from one side surface of the plate body 121 in the first direction Z, the first direction Z is the thickness direction of the plate body 121, and the second direction Y is the length direction of the plate body 121, wherein the support platform 122 includes a plurality of support ribs 1223, the plurality of support ribs 1223 cooperatively define a plurality of exhaust passages 1221, the plurality of exhaust passages 1221 all penetrate the support platform 122 in the second direction Y and are in communication with the pressure relief hole 1211.

[0205] In the above technical solution, the support platform 122 is provided with a plurality of support ribs 1223, which can improve the structural strength of the support platform 122, reduce the probability of deformation of the support platform 122 under pressure, and enable the support platform 122 to stably support between the electrode assembly 15 and the first wall 111, thereby improving the stability of the internal structure of the battery cell 10 and improving the insulation performance inside the battery cell 10. At the same time, the plurality of support ribs 1223 of the support platform 122 define the exhaust passages 1221 penetrating the support platform 122 in the second direction Y, and since the support platform 122 can be stably supported between the electrode assembly 15 and the first wall 111, the exhaust passages 1221 can stably communicate the spaces on both sides of the support platform 122 in the second direction Y. When gas is generated inside the battery cell 10, when the gas flows to the end portion of the shell 11 where the first insulation 12 is arranged, the gas can pass through the exhaust passages 1221 to the position of the pressure relief hole 1211, and then be discharged to the outside of the shell 11 through the pressure relief structure 13, thereby improving the pressure relief efficiency and reducing the risk of out-of-control of the battery cell 10.

[0206] In a third aspect, the embodiments of the present application further provide a battery device 100, which includes the battery cell 10 of any of the above embodiments.

[0207] In some examples, the battery device 100 further comprises a box body 20, the box body 20 comprising a box main body 21 and a cover body 22, the box main body 21 being a rectangular parallelepiped with an open top, and the cover body 22 covering the top of the box main body 21, the periphery of the cover body 22 being fastened to the periphery of the box main body 21 by fasteners. Specifically, the periphery of the open top of the box main body 21 is provided with a plurality of first connecting holes, the plurality of first connecting holes being arranged at intervals along the periphery of the box main body 21, and the periphery of the cover body 22 is formed with an outwardly extending flange, the flange extending annularly along the periphery of the cover body 22, and the flange is formed with a plurality of second connecting holes, the plurality of first connecting holes and the plurality of second connecting holes being opposite in the first direction Z. The cover body 22 is fastened to the box main body 21 by the fasteners passing through the first connecting holes and the second connecting holes.

[0208] Further, a seal is arranged between the cover body 22 and the box main body 21, the seal extending annularly along the periphery of the cover body 22 and abutting between the cover body 22 and the box main body 21.

[0209] In some examples, a partition beam is arranged in the box body 20, the partition beam dividing the space in the box body 20 into a battery cavity and an electrical cavity, the number of the battery monomers 10 being a plurality, and the plurality of battery monomers 10 being arranged in the battery cavity, for example, the plurality of battery monomers 10 being arranged in layers along the length direction and the width direction of the box body 20. Other electrical elements, such as high-low voltage distribution boxes, are arranged in the electrical cavity.

[0210] In some examples, the battery device 100 further comprises a heat exchange member, the heat exchange member being arranged in the box body 20 and located between the inner wall of the box body 20 and the battery monomers 10, for heat exchange with the battery monomers 10. The heat exchange member can also be arranged on the outside of the box body 20, and the heat exchange member can be in heat exchange with the battery monomers 10 through the bottom wall of the box body 20. In addition, the heat exchange member can also be arranged between adjacent battery monomers 10.

[0211] In the technical scheme, the battery device 100 is provided with the battery monomer 10, the support table 122 on the first insulation of the battery monomer 10 is provided with the plurality of support ribs 1223, the plurality of support ribs 1223 can improve the structural strength of the support table 122, reduce the probability of deformation of the support table 122 under pressure, and enable the support table 122 to stably support between the electrode assembly 15 and the first wall 111, thereby improving the stability of the internal structure of the battery monomer 10 and improving the insulation performance inside the battery monomer 10. Meanwhile, the plurality of support ribs 1223 of the support table 122 define an exhaust passage 1221 through the support table 122 along the second direction Y. Since the support table 122 can be stably supported between the electrode assembly 15 and the first wall 111, the exhaust passage 1221 can stably communicate the spaces on both sides of the support table 122 along the second direction Y. When gas is generated inside the battery monomer 10, when the gas flows to the end portion of the housing 11 provided with the first insulation 12, the gas can pass through the exhaust passage 1221 to the position of the pressure relief hole 1211, and then be discharged to the outside of the housing 11 through the pressure relief structure 13, thereby improving the pressure relief efficiency, reducing the risk of out-of-control of the battery monomer 10, and improving the overall performance of the battery device 100.

[0212] In a fourth aspect, the embodiments of the present application also provide a power utilization device 1 comprising the battery device 100 of any of the above-mentioned embodiments.

[0213] In the technical scheme, the power utilization device 1 is provided with the battery device 100, thereby improving the overall performance of the power utilization device 1.

[0214] In the following, the battery device 100 according to one specific embodiment of the present application will be described. Figures 2-15 In the following, the battery device 100 according to one specific embodiment of the present application will be described.

[0215] In the following, the battery device 100 according to one specific embodiment of the present application will be described. Figure 2 The battery device 100 comprises a box body 20 and a plurality of battery monomers 10. The box body 20 comprises a box main body 21 and a cover body 22. The box main body 21 is a rectangular parallelepiped with an open top. The cover body 22 covers the top of the box main body 21. The periphery of the cover body 22 is fastened and connected to the periphery of the box main body 21 by fasteners. The plurality of battery monomers 10 are arranged in a stack along the length direction of the box body 20 to form a battery monomer 10 assembly. The plurality of battery monomer 10 assemblies are arranged in sequence along the width direction of the box body 20.

[0216] As Figures 3-10As shown, the battery cell 10 includes a main shell 112, a top cover assembly 10a and an electrode assembly 15, the top cover assembly 10a includes an end cover, a pole 14, a first insulating piece 12, a second insulating piece and a pressure relief structure 13, the main shell 112 and the end cover constitute a shell 11 of the battery cell 10, the shell 11 is a cuboid box shape, one side of the main shell 112 is open in the first direction Z, the end cover covers the open side of the main shell 112, further, the main shell 112 and the end cover can both be aluminum material pieces to reduce the weight of the shell 11.

[0217] As shown, Figure 5 The end cover is provided with two pole 14 mounting holes and an explosion-proof valve mounting hole arranged at intervals, the explosion-proof valve mounting hole is arranged between the two pole 14 mounting holes. The positive pole 14 and the negative pole 14 are respectively provided in the two pole 14 mounting holes, and the pressure relief structure 13 is provided at the position of the explosion-proof valve mounting hole. The first insulating piece 12 is arranged on the side of the end cover facing the electrode assembly 15, and the second insulating piece is arranged on the side of the end cover away from the electrode assembly 15 and between the end cover and the pole 14.

[0218] As shown, Figure 10 The first insulating piece 12 includes a plate body 121 and two support tables 122, the two support tables 122 are respectively connected to both ends of the plate body 121 in the second direction Y, the height of the support table 122 in the first direction Z is higher than the height of the plate body 121, and the side surface of the support table 122 facing the end cover is flush with the side surface of the plate body 121.

[0219] Specifically, as shown, Figures 12-15 The support table 122 includes a first plate 1225, a second plate 1226, two partition plates 1227 and a plurality of support ribs 1223, the first plate 1225 and the second plate 1226 are parallel and arranged at intervals in the first direction Z, the first plate 1225 is located on the side of the second plate 1226 facing the electrode assembly 15, the two partition plates 1227 are connected between the first plate 1225 and the second plate 1226 and arranged at intervals in the third direction X, the plurality of support ribs 1223 are all connected with the first plate 1225 and located on the side of the first plate 1225 facing the second plate 1226, and arranged between the two partition plates 1227, the plurality of support ribs 1223 extend linearly along the second direction Y and are arranged and sequentially connected in the third direction X, and the connected surfaces of the two adjacent support ribs 1223 are all circularly connected, so that the plurality of support ribs 1223 form a wave-shaped or corrugated support structure. The two support ribs 1223 located on both sides in the third direction X among the plurality of support ribs 1223 are end support ribs 1223, which extend obliquely towards the adjacent partition plate 1227 in the direction from the first plate 1225 to the end cover, and are connected with the end of the partition plate 1227 facing the end cover.

[0220] The first plate 1225, the second plate 1226, the two partition plates 1227 and the plurality of support ribs 1223 define a plurality of exhaust channels 1221 extending along the second direction Y, an outlet of each exhaust channel 1221 is formed at an end face of the support platform 122 away from the plate body 121, the outlet of the exhaust channel 1221 is formed at an end face of the support platform 122 facing the plate body 121 and is located at a side of the plate body 121 facing the electrode assembly 15, and the outlet of the exhaust channel 1221 is in communication with the pressure relief hole 1211 on the plate body 121.

[0221] In the above technical solution, the plurality of support ribs 1223 in the support platform 122 constitute a corrugated support structure, which can improve the structural strength and pressure bearing performance of the support platform 122, improve the structural stability of the first insulating member 12, reduce the probability of movement of the electrode assembly 15 in the shell 11, and ensure the stability of the internal structure of the battery monomer 10. At the same time, the corrugated support structure can define a plurality of exhaust channels 1221, which not only can reduce the cross-sectional area of a single exhaust channel 1221, improve the blocking efficiency of high-temperature impurities such as aluminum molten beads ejected in the shell 11, reduce the risk of fire, and reduce the probability of impurities reaching the position of the pressure relief hole 1211 and blocking the pressure relief hole 1211, but also can increase the total ventilation cross-sectional area of the plurality of exhaust channels 1221, improve the ventilation efficiency, and improve the pressure relief efficiency and safety performance of the battery monomer 10.

[0222] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery cell, characterized by, The utility model relates to a shell (11) is in the cavity (101) of being limited to the shell (11) has first wall (111), and first wall (111) is equipped with pressure relief structure (13) on, first insulation piece (12) is arranged in the side of first wall (111) to the cavity (101), and first insulation piece (12) includes board body (121) and support platform (122), and the pressure relief hole (1211) that forms on board body (121) is through board body (121) along the first direction (Z), and the pressure relief hole (1211) is communicated with pressure relief structure (13), and support platform (122) is connected to both ends of board body (121) in the second direction (Y) and protrudes from the side surface of board body (121) in the second direction (Y) in the direction away from first wall (111), and the first direction (Z) is the thickness direction of board body (121), and the second direction (Y) is the length direction of board body (121), Wherein, support platform (122) includes a plurality of support ribs (1223), and a plurality of exhaust channels (1221) are defined by the plurality of support ribs (1223), and the plurality of exhaust channels (1221) are communicated with the pressure relief hole (1211) and pass through the support platform (122) along the second direction (Y). A plurality of support ribs (1223) extend along the second direction (Y) and are arranged in the third direction (X), and the third direction (X) is the width direction of the board body (121). At least part of the plurality of support ribs (1223) is arranged obliquely relative to the first direction (Z).

2. The battery cell of claim 1, wherein, The oblique directions of two adjacent support ribs (1223) in the third direction (X) are different.

3. The battery cell of claim 2, wherein, In the direction from the first insulation piece (12) to the first wall (111), two adjacent and opposite extending support ribs (1223) are connected and constitute a support part (1224), and at least part of the plurality of support ribs (1223) constitutes a plurality of support parts (1224).

4. The battery cell of claim 3, wherein, Two support ribs (1223) in the support part (1224) are connected in an arc.

5. The battery cell of claim 4, wherein, A plurality of support parts (1224) are sequentially connected in the third direction (X).

6. The battery cell of claim 5, wherein, In the third direction (X), two surfaces of two adjacent support parts (1224) arranged opposite to each other are connected in an arc.

7. The battery cell of claim 5, wherein, A plurality of support parts (1224) are formed as an integral piece.

8. The battery cell of claim 7, wherein, The support platform (122) further comprises a first plate (1225) arranged perpendicular to the first direction (Z), and the plurality of support ribs (1223) are connected to the first plate (1225) and located on the side of the first plate (1225) facing the first wall (111), and the first plate (1225) and the plurality of support ribs (1223) cooperate to define at least part of the plurality of exhaust channels (1221).

9. The battery cell of claim 7, wherein, ​ 10. The battery cell of any one of claims 1-9, wherein, ​ 11. The battery cell of claim 10, wherein, The support ribs (1223) extend along the first direction (Z), and in the first direction (Z), the side of the support ribs (1223) facing the first wall (111) does not protrude beyond the surface of the plate body (121) facing the first wall (111).

12. The battery cell of claim 10, wherein, The support platform (122) further comprises a second plate (1226) arranged on the side of the first plate (1225) facing the first wall (111), and the support ribs (1223) are arranged between the first plate (1225) and the second plate (1226), and the side surface of the second plate (1226) facing the first wall (111) is flush with the side surface of the plate body (121) facing the first wall (111).

13. The battery cell of claim 10, wherein, The support platform (122) further comprises two partition plates (1227) connected to the first plate (1225) and arranged on the side of the first plate (1225) facing the first wall (111), and the partition plates (1227) are arranged in the third direction (X), and the support ribs (1223) are arranged between the partition plates (1227).

14. The battery cell of claim 13, wherein, In the first direction (Z), the side of the partition plates (1227) facing the first wall (111) is flush with the surface of the plate body (121) facing the first wall (111).

15. The battery cell of claim 10, wherein, The support ribs (1223) form a plurality of support portions (1224), each of the support portions (1224) comprises two adjacent support ribs (1223) in the third direction (X), and the ends of the two support ribs (1223) of each of the support portions (1224) facing the first wall (111) are connected, The exhaust passage (1221) is formed between the support portions (1224) and the first plate (1225), and / or the exhaust passage (1221) is formed between two adjacent support portions (1224).

16. The battery cell of claim 1, wherein, The support platform (122) extends from one end to the other end of the plate body (121) in the third direction (X), and the third direction (X) is the width direction of the plate body (121).

17. The battery cell of claim 16, wherein, In the third direction (X), the two side edges of the support platform (122) are flush with the two side edges of the plate body (121), respectively.

18. The battery cell of claim 1, wherein, The inlet and outlet of the exhaust passage (1221) respectively pass through the end faces of the support platform (122) in the second direction (Y), and the outlet of the exhaust passage (1221) is located on the side of the plate body (121) facing away from the first wall (111) in the first direction (Z).

19. The battery cell of claim 1, wherein, The support platform (122) is a polyimide member, a polyether amine member, an aluminum nitride member, or an aluminum and polyimide composite material member; or The first insulating member (12) is a polyimide member, a polyether amine member, an aluminum nitride member, or an aluminum and polyimide composite material member.

20. The battery cell of claim 1, wherein, The first insulating member (12) is integrally formed.

21. The battery cell of claim 1, wherein, The shell (11) comprises a main shell (112) which is open at least on one side in the first direction (Z) and an end cover which covers the open side of the main shell (112) and cooperates with the main shell (112) to define the cavity (101), at least one of the end covers being formed as the first wall (111).

22. A down plastic, characterized by, The lower plastic is the first insulating member (12) of the battery cell (10) according to any one of claims 1-21.

23. A battery device (100), characterized by Comprising: The battery cell (10) according to any one of claims 1-21.

24. An electrically powered device (1) characterized by Comprising the battery device (100) according to claim 23.

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