Battery device and electric equipment

Abstract

The embodiment of the utility model provides a battery device and electric equipment, and belongs to the technical field of batteries. The battery device comprises a battery cell; the box body is used for accommodating the battery monomers, the box body comprises a bottom plate and an expansion beam, the bottom plate is used for bearing the battery monomers along a first direction, and the expansion beam is connected to the bottom plate through a connecting piece; wherein glue is arranged between the expansion beam and the bottom plate, and the expansion beam is connected with the bottom plate through the glue, so that the connection strength of the expansion beam and the bottom plate is enhanced, and the reliability of the power battery is further improved.

Description

Technical Field

[0001] This application relates to the technical field of battery devices, and particularly to a battery device and an electrical equipment. Background Art

[0002] Energy conservation and emission reduction are the keys to the sustainable development of the automotive industry. Electric vehicles have become an important part of the sustainable development of the automotive industry due to their advantages of energy conservation and environmental protection. For electric vehicles, battery device technology is an important factor related to their development.

[0003] In battery technology, the reliability of battery cells is an issue that cannot be ignored. Therefore, how to improve the reliability of battery cells is an urgent technical problem in battery technology. Summary of the Utility Model

[0004] In view of the above problems, this application provides a battery device and an electrical equipment to improve the connection strength between the expansion beam and the bottom plate during vibration, and thus improve the reliability of the battery device.

[0005] In a first aspect, this application provides a battery device, including:

[0006] Battery cells;

[0007] A box body for accommodating the battery cells, the box body includes a bottom plate and an expansion beam, the bottom plate is used to carry the battery cells along a first direction, and the expansion beam is connected to the bottom plate through a connecting member;

[0008] Wherein, a colloid is provided between the expansion beam and the bottom plate, and the expansion beam is connected to the bottom plate through the colloid.

[0009] In the technical solution of the embodiment of this application, the expansion beam is connected to the bottom plate through a connecting member, and at the same time, a colloid connecting the two is provided between the expansion beam and the bottom plate, and the connection strength between the expansion beam and the bottom plate is further enhanced through the colloid, thereby improving the reliability of the power battery.

[0010] In an optional embodiment, the bottom plate is provided with a glue groove recessed in a direction away from the expansion beam, and the colloid is provided in the glue groove.

[0011] By providing a glue groove on the bottom plate to accommodate the colloid, the contact surface between the expansion beam and the bottom plate can be made flatter, thereby strengthening the connection strength between the expansion beam and the bottom plate.

[0012] In an optional embodiment, in a projection plane perpendicular to the first direction, the positive projection of the glue groove does not overlap with the positive projection of the connecting member.

[0013] By making the orthographic projection of the glue groove not overlap with that of the connecting member, the connection between the expansion beam and the bottom plate can be achieved from multiple positions, and at the same time, the interference between the glue and the connecting member can be avoided.

[0014] In an alternative embodiment, the expansion beam extends in the second direction, and a first cavity and a second cavity are formed inside the expansion beam. The first cavity and the second cavity are arranged at intervals in the third direction. The first cavity is closer to the battery cell than the second cavity. The bottom wall of the first cavity is connected to the bottom plate through the glue. The first direction, the second direction, and the third direction are perpendicular to each other in pairs.

[0015] When a first cavity and a second cavity are formed inside the expansion beam, by connecting the bottom wall of the first cavity, which is closer to the battery cell, to the bottom plate through the glue, the connection stability between the side of the expansion beam close to the battery cell and the bottom plate is enhanced, and the possibility of the expansion beam loosening due to the vibration of the battery cell is reduced.

[0016] In an alternative embodiment, a plurality of connecting members are provided. The plurality of connecting members include a first connecting member and a second connecting member. The bottom wall of the first cavity is connected to the bottom plate through the first connecting member, and the bottom wall of the second cavity is connected to the bottom plate through the second connecting member.

[0017] By connecting the bottom wall of the first cavity to the bottom plate through the first connecting member and connecting the bottom wall of the second cavity to the bottom plate through the second connecting member at the same time, the stable installation of each cavity part is realized.

[0018] In an alternative embodiment, a plurality of first connecting members are provided, and a plurality of glue grooves are provided. The plurality of glue grooves are arranged at intervals in the second direction, and at least one first connecting member is arranged between every two adjacent glue grooves.

[0019] By arranging at least one first connecting member between every two adjacent glue grooves, the connection stability between the side of the expansion beam close to the battery cell and the bottom plate is enhanced.

[0020] In an alternative embodiment, at least one second connecting member is arranged on the side of the glue groove along the third direction.

[0021] By arranging at least one second connecting member on the side of the glue groove along the third direction, the expansion beam is further fixed around the edge of the glue groove, and the connection stability between the expansion beam and the bottom plate is enhanced.

[0022] In an alternative embodiment, the first connecting member includes a first rivet nut and a first bolt. The first rivet nut is installed on the expansion beam and the bottom plate and partially extends into the first cavity. The first bolt is connected to the first rivet nut; and / or,

[0023] The second connecting member includes a second rivet nut and a second bolt. The second rivet nut is installed on the expansion beam and the bottom plate and partially extends into the second cavity, and the second bolt is connected to the second rivet nut.

[0024] Through the cooperation of the first bolt and the first rivet nut, the connection between the bottom wall of the first cavity and the bottom plate is realized. Through the cooperation of the second bolt and the second rivet nut, the connection between the bottom wall of the second cavity and the bottom plate is realized.

[0025] In an alternative embodiment, a convex hull corresponding to the position of the glue groove is formed on the side of the bottom plate facing away from the expansion beam.

[0026] At this time, the bottom plate can be formed with corresponding glue grooves and convex hull structures by stamping, so as to facilitate the forming of the glue grooves.

[0027] In a second aspect, the present application provides an electrical device, which includes the battery device in the above embodiments.

[0028] According to the electrical device provided by the present application, since it includes the battery device described in any one of the first aspect embodiments, it has the technical effects described in any one of the above embodiments, which will not be elaborated here.

[0029] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the specification. And in order to make other purposes, features and advantages of the present application more obvious and understandable, the following specifically illustrates the specific embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present application. And in all the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0031] Figure 1 is a schematic structural diagram of a vehicle in some embodiments of the present application;

[0032] Figure 2 is an exploded structural diagram of a battery device in some embodiments of the present application;

[0033] Figure 3 is an exploded structural diagram of a battery cell in some embodiments of the present application;

[0034] Figure 4 is a schematic diagram of a second part of a battery device in some embodiments of the present application;

[0035] Figure 5 Schematic diagram of another angle of the second part of the battery device according to some embodiments of the present application;

[0036] Figure 6 is Figure 5 Enlarged schematic diagram at position A in

[0037] Figure 7 is Figure 5 Cross-sectional view taken along line B-B in

[0038] The reference numerals in the specific embodiments are as follows:

[0039] 1000, vehicle;

[0040] 100, battery device; 200, controller; 300, motor;

[0041] 10, box body; 11, first part; 12, second part; 121, bottom plate; 1211, glue groove; 1212, convex hull; 122, side wall panel; 13, expansion beam; 131, first cavity; 132, second cavity; 14, connecting member; 14a, first connecting member; 14b, second connecting member; 141b, second rivet nut; 142b, second bolt; 15, colloid;

[0042] 20, battery cell; 21, outer shell; 211, end cover; 212, housing; 22, cell assembly; 23, terminal;

[0043] z, first direction; x, second direction; y, third direction. Specific embodiments

[0044] Hereinafter, embodiments of the technical solutions of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and thus are only examples and should not be used to limit the protection scope of the present application.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above accompanying drawings are intended to cover non-exclusive inclusion.

[0046] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of the present application, "a plurality of" means more than two unless otherwise specifically defined.

[0047] Reference to "embodiments" in this document means that the specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appearing at various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0048] In the description of the embodiments of the present application, the term "a plurality" means two or more (including two). Similarly, "a plurality of groups" means two or more groups (including two groups), and "a plurality of sheets" means two or more sheets (including two sheets).

[0049] Currently, from the perspective of the development of the market situation, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely used in electric transportation such as electric bicycles, electric motorcycles, and electric vehicles, as well as in multiple fields such as aerospace. With the continuous expansion of the application fields of power batteries, the market demand is also continuously increasing.

[0050] In existing battery devices, the aluminum base plate and the expansion beam are generally fixed by rivet nuts. However, in high-temperature and high-load vibration tests, the amplitude of the battery device is relatively large, which will cause the connection between the base plate and the expansion beam to become loose, making it difficult to obtain relatively accurate simulation results.

[0051] In order to reduce the loosening of the connection between the base plate and the expansion beam, it has been found through research that a colloid can be provided between the base plate and the expansion beam to improve the connection strength between the expansion beam and the base plate during vibration, thereby enhancing the reliability of the power battery.

[0052] Based on the above considerations, in order to solve the problem that the connection between the base plate and the expansion beam becomes loose when the amplitude of the battery device is relatively large, a battery device is designed. The expansion beam is connected to the base plate through a connecting member, and at the same time, a colloid connecting the two is provided between the expansion beam and the base plate. The connection strength between the expansion beam and the base plate is further enhanced through the colloid, thereby enhancing the reliability of the power battery.

[0053] The battery device disclosed in the embodiments of the present application can be but is not limited to being used in electrical equipment such as vehicles, ships, or aircraft. A power supply system of the electrical equipment can be composed by using the battery device disclosed in the present application.

[0054] The technical solutions described in the embodiments of the present application are applicable to various electrical equipment using battery devices, such as mobile phones, tablets, laptops, electric toys, power tools, battery cars, electric vehicles, ships, spacecraft, and so on. Among them, electric toys can include fixed or mobile electric toys, such as game consoles, electric vehicle toys, electric ship toys, and electric aircraft toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spaceships, etc.

[0055] For the convenience of description in the following embodiments, a vehicle 1000, which is an electrical equipment in an embodiment of the present application, is taken as an example for illustration.

[0056] Please refer to Figure 1 , Figure 1 , which is a schematic structural diagram of the vehicle 1000 provided by some embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc. A battery device 100 is disposed inside the vehicle 1000, and the battery device 100 can be disposed at the bottom, head, or tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000. For example, the battery device 100 can be used as the operating power source of the vehicle 1000, or can be used for the circuit system of the vehicle 1000, such as for the working power requirements during the start, navigation, and operation of the vehicle 1000.

[0057] The vehicle 1000 may further include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300. For example, it is used for the working power requirements during the start, navigation, and driving of the vehicle 1000.

[0058] In some embodiments of the present application, the battery device 100 can not only be used as the operating power source of the vehicle 1000, but also be used as the driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0059] Please refer to Figure 2 , Figure 2 , which is an exploded structural diagram of the battery device 100 provided by some embodiments of the present application. The battery device 100 includes a box body 10 and battery cells 20, and the battery cells 20 are accommodated in the box body 10. Among them, the box body 10 is used to provide an accommodation space for the battery cells 20, and the box body 10 can adopt various structures.

[0060] In some embodiments, the box body 10 may include a first part 11 and a second part 12. The first part 11 and the second part 12 are covered with each other, and the first part 11 and the second part 12 jointly define a receiving space for receiving the battery cell 20. The second part 12 may be a hollow structure with an open end, and the first part 11 may be a plate-like structure. The first part 11 covers the open side of the second part 12 so that the first part 11 and the second part 12 jointly define the receiving space; the first part 11 and the second part 12 may also both be hollow structures with an open side, and the open side of the first part 11 covers the open side of the second part 12. Of course, the box body 10 formed by the first part 11 and the second part 12 may be in various shapes, such as a cylinder, a cuboid, etc.

[0061] In the battery device 100, there may be multiple battery cells 20, and the multiple battery cells 20 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that there are both series and parallel connections among the multiple battery cells 20. The multiple battery cells 20 may be directly connected in series, in parallel, or in a mixed connection together, and then the whole formed by the multiple battery cells 20 is received in the box body 10; of course, in the battery device 100, multiple battery cells 20 may also be first connected in series, in parallel, or in a mixed connection to form a battery module form, and then multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole and are received in the box body 10. The battery device 100 may further include other structures. For example, the battery device 100 may further include a busbar component for realizing the electrical connection among the multiple battery cells 20.

[0062] Among them, each battery cell 20 may be a secondary battery, which refers to a battery cell that can activate the active material and continue to be used by charging after discharging.

[0063] Please refer to Figure 3 , Figure 3 which is a schematic exploded view of the battery cell 20 provided in some embodiments of the present application. A battery cell 20 refers to the smallest unit that makes up the battery device 100. As Figure 3 shown, the battery cell 20 includes a housing 21, a battery core assembly 22, and other functional components.

[0064] The housing 21 includes an end cap 211 and a housing body 212. The end cap 211 is a component that covers the opening of the housing body 212 to isolate the internal environment of the battery cell 20 from the external environment. Without limitation, the shape of the end cap 211 can be adapted to the shape of the housing body 212 to cooperate with the housing body 212. Optionally, the end cap 211 can be made of a material with certain hardness and strength (such as aluminum alloy). In this way, the end cap 211 is not easily deformed when subjected to extrusion and collision, enabling the battery cell 20 to have higher structural strength and improved safety performance. Functional components such as a terminal post 23 can be provided on the end cap 211. The terminal post 23 can be used for electrical connection with the battery cell assembly 22 to output or input the electrical energy of the battery cell 20. In some embodiments, a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold can also be provided on the end cap 211. The material of the end cap 211 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not make special restrictions on this. In some embodiments, an insulating member can also be provided on the inner side of the end cap 211. The insulating member can be used to isolate the electrical connection components in the housing body 212 from the end cap 211 to reduce the risk of short circuit. Exemplarily, the insulating member can be plastic, rubber, etc.

[0065] The housing body 212 is a component used to cooperate with the end cap 211 to form the internal environment of the battery cell 20. Among them, the formed internal environment can be used to accommodate the battery cell assembly 22, the electrolyte, and other components. The housing body 212 and the end cap 211 can be independent components. An opening can be provided on the housing body 212, and the end cap 211 is covered at the opening to form the internal environment of the battery cell 20. Without limitation, the end cap 211 and the housing body 212 can also be integrated. Specifically, the end cap 211 and the housing body 212 can first form a common connection surface before other components are inserted into the housing. When it is necessary to encapsulate the inside of the housing body 212, the end cap 211 is then covered on the housing body 212. The housing body 212 can be of various shapes and sizes, such as rectangular parallelepiped, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing body 212 can be determined according to the specific shape and size of the battery cell assembly 22. The material of the housing body 212 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not make special restrictions on this.

[0066] The battery cell assembly 22 is the component in the battery cell 20 where electrochemical reactions occur. The housing 212 may contain one or more battery cell assemblies 22. The battery cell assembly 22 is mainly formed by winding or laminating a positive electrode sheet and a negative electrode sheet, and a separator is usually provided between the positive electrode sheet and the negative electrode sheet. The parts of the positive electrode sheet and the negative electrode sheet with active materials constitute the main body of the battery cell assembly 22, and the parts of the positive electrode sheet and the negative electrode sheet without active materials respectively constitute the electrode tabs. The positive electrode tab and the negative electrode tab may be located together at one end of the main body or separately at both ends of the main body. During the charge and discharge process of the battery, the positive active material and the negative active material react with the electrolyte, and the electrode tabs are connected to the electrode terminals to form a current loop.

[0067] According to some embodiments of the present application, referring to Figure 2 and further referring to Figures 4 to 7 , Figure 4 is a schematic diagram of the second part in the battery device according to some embodiments of the present application. Figure 5 is a schematic diagram of another angle of the second part in the battery device according to some embodiments of the present application. Figure 6 is Figure 5 an enlarged schematic diagram of part A in Figure 7 is Figure 5 a cross-sectional view taken along line B-B in

[0068] The present application provides a battery device 100. The battery device 100 includes a battery cell 20 and a box body 10 for accommodating the battery cell 20. The box body 10 includes a bottom plate 121 and an expansion beam 13. The bottom plate 121 is used to carry the battery cell 20 along the first direction z, and the expansion beam 13 is connected to the bottom plate 121 through a connecting member 14.

[0069] Wherein, a colloid 15 is provided between the expansion beam 13 and the bottom plate 121, and the expansion beam 13 is connected to the bottom plate 121 through the colloid 15.

[0070] The box body 10 includes a first part 11 and a second part 12. The second part 12 serves as the lower box body, and the second part 12 includes a bottom plate 121 and a side wall plate 122 disposed around the outer periphery of the bottom plate 121. The first part 11 serves as a cover and covers the lower box body along the first direction z.

[0071] The colloid 15 can be selected as the two-component structural adhesive 2KTSA0904C.

[0072] In the technical solution of the embodiment of the present application, the expansion beam 13 is connected to the bottom plate 121 through the connecting member 14, and at the same time, a colloid 15 connecting the two is provided between the expansion beam 13 and the bottom plate 121. The connection strength between the expansion beam 13 and the bottom plate 121 is further enhanced through the colloid 15, thereby improving the reliability of the power battery.

[0073] According to some embodiments of the present application, referring to Figure 7 , a glue groove 1211 recessed in a direction away from the expansion beam 13 is provided on the bottom plate 121, and the colloid 15 is disposed in the glue groove 1211.

[0074] By providing the glue groove 1211 on the bottom plate 121 to accommodate the colloid 15, the contact surface between the expansion beam 13 and the bottom plate 121 can be made flatter, thereby strengthening the connection strength between the expansion beam 13 and the bottom plate 121.

[0075] According to some embodiments of the present application, referring to Figures 5 - 6 , in the projection plane perpendicular to the first direction z, the orthographic projection of the glue groove 1211 does not overlap with the orthographic projection of the connecting member 14.

[0076] The "orthographic projection of the glue groove 1211" refers to the projection of the glue groove 1211 along the first direction z.

[0077] The "orthographic projection of the connecting member 14" refers to the projection of the connecting member 14 along the first direction z.

[0078] By making the orthographic projection of the glue groove 1211 not overlap with the orthographic projection of the connecting member 14, the connection between the expansion beam 13 and the bottom plate 121 can be achieved from multiple positions, and at the same time, the interference between the colloid 15 and the connecting member 14 can be avoided.

[0079] According to some embodiments of the present application, referring to Figures 4 - 7 , the expansion beam 13 extends along the second direction x, a first cavity 131 and a second cavity 132 are formed inside the expansion beam 13, the first cavity 131 and the second cavity 132 are arranged at intervals along the third direction y, the first cavity 131 is closer to the battery cell 20 than the second cavity 132, the bottom wall of the first cavity 131 is connected to the bottom plate 121 through the colloid 15, and the first direction z, the second direction x and the third direction y are perpendicular to each other in pairs.

[0080] When the first cavity 131 and the second cavity 132 are formed inside the expansion beam 13, by connecting the bottom wall of the first cavity 131, which is closer to the battery cell 20, to the bottom plate 121 through the colloid 15, the connection stability between the side of the expansion beam 13 close to the battery cell 20 and the bottom plate 121 is enhanced, and the possibility of the expansion beam 13 loosening due to the vibration of the battery cell 20 is reduced.

[0081] According to some embodiments of the present application, referring to Figures 5 - 7 , a plurality of connecting members 14 are provided, the plurality of connecting members 14 include a first connecting member 14a and a second connecting member 14b, the bottom wall of the first cavity 131 is connected to the bottom plate 121 through the first connecting member 14a, and the bottom wall of the second cavity 132 is connected to the bottom plate 121 through the second connecting member 14b.

[0082] The bottom wall of the first cavity 131 is connected to the bottom plate 121 through the first connecting member 14a, and at the same time, the bottom wall of the second cavity 132 is connected to the bottom plate 121 through the second connecting member 14b, so as to realize the stable installation of each cavity part.

[0083] According to some embodiments of the present application, referring to Figures 5 - 6 , there are multiple first connecting members 14a, and there are multiple glue grooves 1211. The multiple glue grooves 1211 are arranged at intervals along the second direction x, and at least one first connecting member 14a is arranged between every two adjacent glue grooves 1211.

[0084] By arranging at least one first connecting member 14a between every two adjacent glue grooves 1211, the connection stability between the side of the expansion beam 13 close to the battery cell 20 and the bottom plate 121 is enhanced.

[0085] According to some embodiments of the present application, referring to Figures 5 - 7 , at least one second connecting member 14b is arranged on the side of the glue groove 1211 along the third direction y.

[0086] By arranging at least one second connecting member 14b on the side of the glue groove 1211 along the third direction y, the expansion beam 13 is further fixed around the edge of the glue groove 1211, and the connection stability between the expansion beam 13 and the bottom plate 121 is enhanced.

[0087] According to some embodiments of the present application, at least one of the first connecting member 14a and the second connecting member 14b can be composed of a blind rivet nut and a bolt. Referring to Figure 7 , both the first connecting member 14a and the second connecting member 14b are composed of a blind rivet nut and a bolt.

[0088] Specifically, the first connecting member 14a includes a first blind rivet nut and a first bolt. The first blind rivet nut is installed on the expansion beam 13 and the bottom plate 121 and partially extends into the first cavity 131, and the first bolt is connected to the first blind rivet nut.

[0089] The second connecting member 14b includes a second blind rivet nut 141b and a second bolt 142b. The second blind rivet nut 141b is installed on the expansion beam 13 and the bottom plate 121 and partially extends into the second cavity 132, and the second bolt 142b is connected to the second blind rivet nut 141b.

[0090] Through the cooperation of the first bolt and the first blind rivet nut, the connection between the bottom wall of the first cavity 131 and the bottom plate 121 is realized. Through the cooperation of the second bolt 142b and the second blind rivet nut 141b, the connection between the bottom wall of the second cavity 132 and the bottom plate 121 is realized.

[0091] In other embodiments not shown, at least one of the first connecting member 14a and the second connecting member 14b may be composed of a screw and a hexagonal nut; or, at least one of the first connecting member 14a and the second connecting member 14b may be composed of a rivet; or, the first connecting member 14a and the second connecting member 14b may be composed of other structures that can achieve a stable connection between the two components.

[0092] According to some embodiments of the present application, referring to Figures 5 - 7 A convex bump 1212 corresponding to the position of the glue groove 1211 is formed on the side of the bottom plate 121 away from the expansion beam 13 .

[0093] At this time, the bottom plate 121 can be formed into corresponding adhesive grooves 1211 and convex bumps 1212 structures by stamping, so as to facilitate the molding of the adhesive grooves 1211 .

[0094] According to some embodiments of the present application, the present application also provides an electrical device, comprising a battery according to any of the above schemes, and the battery is used to provide electrical energy to the electrical device.

[0095] The power-consuming device may be any of the aforementioned devices or systems using batteries.

[0096] According to some embodiments of the present application, see Figure 2 , Figures 4 to 7 The present application provides a battery device 100, wherein the box 10 includes a first part 11 and a second part 12, wherein the second part 12 is used as a lower box, and the second part 12 includes a bottom plate 121 and a side plate 122 arranged around the periphery of the bottom plate 121, wherein the bottom plate 121 is used to carry a battery cell 20 along a first direction z. The first part 11 is used as a cover, which covers the lower box along the first direction z.

[0097] The box 10 also includes an expansion beam 13 extending along the second direction x, and a first cavity 131 and a second cavity 132 are formed inside the expansion beam 13, which are arranged at intervals along the third direction y. The first cavity 131 is closer to the battery cell 20 than the second cavity 132. The bottom wall of the first cavity 131 is connected to the bottom plate 121 through the first connecting member 14a and the colloid 15, and the bottom wall of the second cavity 132 is connected to the bottom plate 121 through the second connecting member 14b. The first connecting member 14a and the second connecting member 14b are both composed of rivet nuts and bolts.

[0098] The bottom plate 121 is formed by stamping to have a glue groove 1211 that is recessed in a direction away from the expansion beam 13, and the glue 15 is disposed in the glue groove 1211. The glue 15 is 2KTSA0904C two-component structural glue.

[0099] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered within the scope of the claims and the specification of the present application. In particular, as long as there is no structural conflict, the technical features 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 that fall within the scope of the claims.

Claims

1. A battery device, characterized in that, include: Battery cells; A box body, used to accommodate the battery monomer, the box body includes a bottom plate and an expansion beam, the bottom plate is used to carry the battery monomer along a first direction, and the expansion beam is connected to the bottom plate through a connector; Wherein, a colloid is arranged between the expansion beam and the bottom plate, and the expansion beam is connected to the bottom plate through the colloid.

2. The battery device according to claim 1, wherein The bottom plate is provided with a glue groove which is recessed in a direction away from the expansion beam, and the colloid is arranged in the glue groove.

3. The battery device according to claim 2, wherein In a projection plane perpendicular to the first direction, the orthographic projection of the glue groove does not overlap with the orthographic projection of the connecting member.

4. The battery device according to claim 2, characterized in that, The expansion beam extends along the second direction, and a first cavity and a second cavity are formed inside the expansion beam. The first cavity and the second cavity are arranged at intervals along the third direction. The first cavity is closer to the battery cell than the second cavity. The bottom wall of the first cavity is connected to the bottom plate through the colloid, and the first direction, the second direction and the third direction are perpendicular to each other.

5. The battery device according to claim 4, wherein There are multiple connecting members, including a first connecting member and a second connecting member. The bottom wall of the first cavity is connected to the bottom plate through the first connecting member, and the bottom wall of the second cavity is connected to the bottom plate through the second connecting member.

6. The battery device according to claim 5, characterized in that, There are a plurality of the first connecting members, and a plurality of the glue grooves. The plurality of glue grooves are arranged at intervals along the second direction, and at least one first connecting member is arranged between every two adjacent glue grooves.

7. The battery device according to claim 6, wherein At least one second connecting member is disposed on the side of the glue groove along the third direction.

8. The battery device according to claim 5, wherein, The first connecting member includes a first rivet nut and a first bolt, the first rivet nut is installed on the expansion beam and the bottom plate and partially extends into the first cavity, and the first bolt is connected to the first rivet nut; and / or, The second connecting member includes a second rivet nut and a second bolt. The second rivet nut is installed on the expansion beam and the base plate and partially extends into the second cavity. The second bolt is connected to the second rivet nut.

9. The battery device according to claim 2, characterized in that, A convex bump corresponding to the position of the glue groove is formed on one side of the bottom plate away from the expansion beam.

10. An electrical device, characterized in that, A battery device comprising the battery device as claimed in any one of claims 1 to 9.

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