Battery apparatus and electric device

Abstract

The present application relates to the technical field of batteries, and provides a battery apparatus and an electric device. The battery apparatus comprises: battery cells; and a case for accommodating the battery cells. The case comprises a bottom plate and an expansion beam, wherein the bottom plate is used for carrying the battery cells in a first direction, the expansion beam is connected to the bottom plate by means of a connecting member, an adhesive is provided between the expansion beam and the bottom plate, and the expansion beam is connected to the bottom plate by means of the adhesive, so as to improve the connection strength between the expansion beam and the bottom plate, thereby improving the reliability of a power battery.

Description

Battery devices and electrical equipment Cross-references to related applications

[0001] This application claims priority to Chinese Patent Application No. 202520562702.2, filed on March 28, 2025, entitled “Battery Device and Electrical Equipment”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of battery device technology, specifically to a battery device and electrical equipment. Background Technology

[0003] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0004] In battery technology, the reliability of individual battery cells is a crucial issue. Therefore, improving the reliability of individual battery cells is a pressing technical problem that needs to be solved. Summary of the Invention

[0005] In view of the above problems, this application provides a battery device and electrical equipment to improve the connection strength between the expansion beam and the base plate during vibration, thereby improving the reliability of the battery device.

[0006] In a first aspect, this application provides a battery device, comprising:

[0007] Battery cell;

[0008] A housing for accommodating the battery cells, the housing including a base plate and an expansion beam, the base plate for supporting the battery cells along a first direction, and the expansion beam connected to the base plate by a connector;

[0009] An adhesive is provided between the expansion beam and the base plate, and the expansion beam is connected to the base plate through the adhesive.

[0010] In the technical solution of this application embodiment, the expansion beam is connected to the base plate by a connector, and an adhesive is provided between the expansion beam and the base plate to connect the two. The adhesive further strengthens the connection strength between the expansion beam and the base plate, thereby improving the reliability of the power battery.

[0011] In an optional embodiment, the base plate is provided with a groove recessed in a direction away from the expansion beam, and the adhesive is disposed in the groove.

[0012] By setting a glue groove in the base plate to accommodate the glue, the contact surface between the expansion beam and the base plate can be made flatter, thereby strengthening the connection between the expansion beam and the base plate.

[0013] In an optional embodiment, the orthographic projection of the adhesive groove and the orthographic projection of the connector do not overlap in a projection plane perpendicular to the first direction.

[0014] By ensuring that the orthographic projection of the glue tank does not overlap with the orthographic projection of the connector, the expansion beam and the base plate can be connected from multiple positions, while avoiding mutual interference between the glue and the connector.

[0015] In an optional embodiment, the expansion beam extends along a second direction, and a first cavity and a second cavity are formed inside the expansion beam. The first cavity and the second cavity are spaced apart along a 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 base plate through the colloid. The first direction, the second direction and the third direction are perpendicular to each other.

[0016] When the expansion beam has a first cavity and a second cavity inside, the bottom wall of the first cavity, which is closer to the battery cell, is connected to the base plate through an adhesive to enhance the connection stability between the side of the expansion beam closer to the battery cell and the base plate, thereby reducing the possibility of the expansion beam loosening due to vibration of the battery cell.

[0017] In an optional embodiment, multiple connectors are provided, including a first connector and a second connector. The bottom wall of the first cavity is connected to the base plate through the first connector, and the bottom wall of the second cavity is connected to the base plate through the second connector.

[0018] The bottom wall of the first cavity is connected to the base plate via a first connector, and the bottom wall of the second cavity is connected to the base plate via a second connector, thereby achieving stable installation of each cavity.

[0019] In an optional embodiment, a plurality of first connectors are provided, a plurality of glue grooves are provided, the plurality of glue grooves are spaced apart along the second direction, and at least one first connector is provided between each two adjacent glue grooves.

[0020] By providing at least one first connector between every two adjacent glue tanks, the connection stability between the expansion beam and the base plate on the side closer to the battery cell is enhanced.

[0021] In an optional embodiment, at least one of the second connectors is provided in the lateral direction of the adhesive groove along the third direction.

[0022] By providing at least one second connector along the third direction on the side of the glue groove, the expansion beam is further fixed around the edge of the glue groove, thereby enhancing the connection stability between the expansion beam and the base plate.

[0023] In an optional embodiment, the first connector includes a first rivet nut and a first bolt, the first rivet nut being mounted on the expansion beam and the base plate and partially extending into the first cavity, and the first bolt being connected to the first rivet nut; and / or,

[0024] The second connector 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.

[0025] The bottom wall of the first cavity is connected to the base plate by the cooperation of the first bolt and the first rivet nut. The bottom wall of the second cavity is connected to the base plate by the cooperation of the second bolt and the second rivet nut.

[0026] In an optional embodiment, the bottom plate has a protrusion on the side opposite to the expansion beam that corresponds to the position of the adhesive groove.

[0027] At this point, the base plate can be stamped to form the corresponding glue groove and convex structure, so as to facilitate the forming of the glue groove.

[0028] Secondly, this application provides an electrical device that includes the battery device described in the above embodiments.

[0029] The electrical equipment provided according to this application includes the battery device described in any one of the first aspect embodiments, and therefore has the technical effects described in any of the above embodiments, which will not be repeated here.

[0030] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description

[0031] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0032] Figure 1 is a schematic diagram of the vehicle structure in some embodiments of this application;

[0033] Figure 2 is an exploded structural diagram of the battery device in some embodiments of this application;

[0034] Figure 3 is a schematic diagram of the exploded structure of a battery cell in some embodiments of this application;

[0035] Figure 4 is a schematic diagram of the second part of a battery device according to some embodiments of this application;

[0036] Figure 5 is a schematic diagram of the second part of a battery device according to some embodiments of this application from another angle;

[0037] Figure 6 is an enlarged schematic diagram of point A in Figure 5;

[0038] Figure 7 is a cross-sectional view of section BB in Figure 5.

[0039] The accompanying drawings are not drawn to scale.

[0040] Markings: 1000, Vehicle; 100, Battery assembly; 200, Controller; 300, Motor; 10, Housing; 11, First part; 12, Second part; 121, Base plate; 1211, Glue groove; 1212, Protrusion; 122, Side panel; 13, Expansion beam; 131, First cavity; 132, Second cavity; 14, Connector; 14a, First connector; 14b, Second connector; 141b, Second rivet nut; 142b, Second bolt; 15, Glue; 20, Battery cell; 21, Outer shell; 211, End cap; 212, Housing; 22, Cell assembly; 23, Terminal; z, First direction; x, Second direction; y, Third direction. Detailed Implementation

[0041] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0042] 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 pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0043] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0044] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0045] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0046] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0047] In existing battery devices, the aluminum base plate and expansion beam are generally fixed by rivet nuts. However, in vibration tests with high temperature and large load, the amplitude of the battery device is large, which can cause the connection between the base plate and the expansion beam to loosen, making it difficult to obtain accurate simulation results.

[0048] To reduce the loosening of the connection between the base plate and the expansion beam, research has found that a colloid can be placed between the base plate and the expansion beam to improve the connection strength between the expansion beam and the base plate during vibration, thereby improving the reliability of the power battery.

[0049] Based on the above considerations, in order to solve the problem of loosening of the connection between the base plate and the expansion beam when the battery device experiences large amplitude vibration, a battery device is designed. The expansion beam is connected to the base plate through a connector, and an adhesive is provided between the expansion beam and the base plate to further strengthen the connection between the expansion beam and the base plate, thereby improving the reliability of the power battery.

[0050] The battery device disclosed in this application can be used, but is not limited to, in electrical equipment such as vehicles, ships, or aircraft. A power system for such electrical equipment can be constructed using the battery device disclosed in this application.

[0051] The technical solutions described in this application are applicable to various battery-powered devices, such as mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0052] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0053] Please refer to Figure 1, which is a structural schematic diagram of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is installed inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000, or it can be used in the vehicle 1000's electrical system, for example, to meet the power requirements for starting, navigation, and operation of the vehicle 1000.

[0054] The vehicle 1000 may also 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, for the power needs of the vehicle 1000 during startup, navigation and driving.

[0055] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0056] Please refer to Figure 2, which is an exploded structural diagram of a battery device 100 provided in some embodiments of this application. The battery device 100 includes a housing 10 and battery cells 20, with the battery cells 20 housed within the housing 10. The housing 10 provides space for the battery cells 20, and the housing 10 can adopt various structures.

[0057] In some embodiments, the housing 10 may include a first portion 11 and a second portion 12, which overlap each other, and together define a receiving space for accommodating the battery cell 20. The second portion 12 may be a hollow structure with one open end, and the first portion 11 may be a plate-like structure, with the first portion 11 covering the open side of the second portion 12 so that the first portion 11 and the second portion 12 together define the receiving space; alternatively, the first portion 11 and the second portion 12 may both be hollow structures with one open side, with the open side of the first portion 11 covering the open side of the second portion 12. Of course, the housing 10 formed by the first portion 11 and the second portion 12 can be of various shapes, such as a cylinder, a cuboid, etc.

[0058] In the battery device 100, there can be multiple battery cells 20, which can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 20 are connected in both series and parallel connections. Multiple battery cells 20 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cells 20 is housed within the housing 10. Alternatively, the battery device 100 can also consist of multiple battery cells 20 first connected in series, parallel, or in a mixed configuration to form battery modules, and then these battery modules are connected in series, parallel, or in a mixed configuration to form a whole, which is also housed within the housing 10. The battery device 100 may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells 20.

[0059] Each battery cell 20 can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0060] Please refer to Figure 3, which is an exploded structural diagram of a battery cell 20 provided in some embodiments of this application. A battery cell 20 refers to the smallest unit that makes up the battery device 100. As shown in Figure 3, the battery cell 20 includes a casing 21, a cell assembly 22, and other functional components.

[0061] The outer casing 21 includes an end cap 211 and a housing 212. The end cap 211 is a component that covers the opening of the housing 212 to isolate the internal environment of the battery cell 20 from the external environment. The shape of the end cap 211 can be adapted to the shape of the housing 212 to fit it. Optionally, the end cap 211 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap 211 is less prone to deformation under pressure and impact, allowing the battery cell 20 to have higher structural strength and improved safety performance. Functional components such as terminals 23 can be provided on the end cap 211. The terminals 23 can be used to electrically connect to the cell assembly 22 for outputting or inputting electrical energy from the battery cell 20. In some embodiments, the end cap 211 can also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold. The end cap 211 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this application embodiment does not impose any special limitations 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 212 from the end cap 211 to reduce the risk of short circuit. For example, the insulating member can be plastic, rubber, etc.

[0062] The housing 212 is a component used to cooperate with the end cap 211 to form the internal environment of the battery cell 20. This internal environment can accommodate the cell assembly 22, electrolyte, and other components. The housing 212 and the end cap 211 can be independent components. An opening can be provided on the housing 212, and the end cap 211 can be used to close the opening to form the internal environment of the battery cell 20. Alternatively, the end cap 211 and the housing 212 can be integrated. Specifically, the end cap 211 and the housing 212 can form a common connecting surface before other components are inserted into the housing. When it is necessary to encapsulate the interior of the housing 212, the end cap 211 closes the housing 212. The housing 212 can have various shapes and sizes, such as cuboid, cylindrical, or hexagonal prism. Specifically, the shape of the housing 212 can be determined according to the specific shape and size of the cell assembly 22. The shell 212 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. This application embodiment does not impose any special restrictions on this.

[0063] The cell assembly 22 is the component within the battery cell 20 where the electrochemical reaction occurs. The casing 212 may contain one or more cell assemblies 22. The cell assembly 22 is primarily formed by winding or stacking positive and negative electrode plates, and typically a separator is provided between the positive and negative electrode plates. The portions of the positive and negative electrode plates containing active material constitute the main body of the cell assembly 22, while the portions without active material each constitute a tab. The positive and negative tabs may be located together at one end of the main body or separately at both ends. During the charging and discharging process of the battery, the positive and negative active materials react with the electrolyte, and the tabs connect to the electrode terminals to form a current loop.

[0064] According to some embodiments of this application, referring to FIG2, and further referring to FIG4 to FIG7, FIG4 is a schematic diagram of the second part of the battery device according to some embodiments of this application, FIG5 is a schematic diagram of the second part of the battery device according to some embodiments of this application from another angle, FIG6 is an enlarged schematic diagram of point A in FIG5; FIG7 is a cross-sectional view of point BB in FIG5.

[0065] This application provides a battery device 100. The battery device 100 includes a battery cell 20 and a housing 10 for accommodating the battery cell 20. The housing 10 includes a base plate 121 and an expansion beam 13. The base plate 121 is used to support the battery cell 20 along a first direction z. The expansion beam 13 is connected to the base plate 121 by a connector 14.

[0066] An adhesive 15 is provided between the expansion beam 13 and the base plate 121, and the expansion beam 13 is connected to the base plate 121 through the adhesive 15.

[0067] The housing 10 includes a first part 11 and a second part 12. The second part 12 serves as the lower housing and includes a bottom plate 121 and side panels 122 arranged around the outer periphery of the bottom plate 121. The first part 11 serves as a cover and fits onto the lower housing along the first direction z.

[0068] Colloid 15 can be selected as 2KTSA0904C two-component structural adhesive.

[0069] In the technical solution of this application embodiment, the expansion beam 13 is connected to the base plate 121 by the connector 14, and a glue 15 is provided between the expansion beam 13 and the base plate 121 to connect the two. The glue 15 further strengthens the connection strength between the expansion beam 13 and the base plate 121, thereby improving the reliability of the power battery.

[0070] According to some embodiments of this application, referring to FIG7, the base plate 121 is provided with a glue groove 1211 recessed in the direction away from the expansion beam 13, and the glue 15 is disposed in the glue groove 1211.

[0071] By providing a glue groove 1211 in the base plate 121 to accommodate the glue 15, the contact surface between the expansion beam 13 and the base plate 121 can be made flatter, thereby strengthening the connection between the expansion beam 13 and the base plate 121.

[0072] According to some embodiments of this application, referring to Figures 5-6, in a 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 connector 14.

[0073] "The orthographic projection of the glue tank 1211" refers to the projection of the glue tank 1211 along the first direction z.

[0074] "The orthographic projection of connector 14" refers to the projection of connector 14 along the first direction z.

[0075] By ensuring that the orthographic projection of the glue tank 1211 does not overlap with the orthographic projection of the connector 14, the expansion beam 13 and the base plate 121 can be connected from multiple positions, while avoiding mutual interference between the glue 15 and the connector 14.

[0076] According to some embodiments of this application, referring to Figures 4-7, the expansion beam 13 extends along the second direction x, and 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 spaced apart 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 adhesive 15. The first direction z, the second direction x and the third direction y are perpendicular to each other.

[0077] When the expansion beam 13 has a first cavity 131 and a second cavity 132 inside, the bottom wall of the first cavity 131, which is closer to the battery cell 20, is connected to the base plate 121 by the adhesive 15. This enhances the connection stability between the side of the expansion beam 13 closer to the battery cell 20 and the base plate 121, and reduces the possibility of the expansion beam 13 loosening due to the vibration of the battery cell 20.

[0078] According to some embodiments of this application, referring to Figures 5-7, multiple connectors 14 are provided, including a first connector 14a and a second connector 14b. The bottom wall of the first cavity 131 is connected to the bottom plate 121 through the first connector 14a, and the bottom wall of the second cavity 132 is connected to the bottom plate 121 through the second connector 14b.

[0079] The bottom wall of the first cavity 131 is connected to the base plate 121 by the first connector 14a, and the bottom wall of the second cavity 132 is connected to the base plate 121 by the second connector 14b, so as to achieve stable installation of each cavity.

[0080] According to some embodiments of this application, referring to Figures 5-6, a plurality of first connectors 14a are provided, a plurality of glue grooves 1211 are provided, the plurality of glue grooves 1211 are spaced apart along the second direction x, and at least one first connector 14a is provided between each two adjacent glue grooves 1211.

[0081] By providing at least one first connector 14a between each pair of adjacent glue tanks 1211, the connection stability between the side of the expansion beam 13 near the battery cell 20 and the base plate 121 is enhanced.

[0082] According to some embodiments of this application, referring to Figures 5-7, the glue groove 1211 is provided with at least one second connector 14b along the lateral direction of the third direction y.

[0083] By providing at least one second connector 14b along the third direction y on the side of the glue groove 1211, the expansion beam 13 is further fixed around the edge of the glue groove 1211, thereby enhancing the connection stability between the expansion beam 13 and the base plate 121.

[0084] According to some embodiments of this application, at least one of the first connector 14a and the second connector 14b may be composed of rivet nuts and bolts. Referring to FIG7, both the first connector 14a and the second connector 14b are composed of rivet nuts and bolts.

[0085] Specifically, the first connector 14a includes a first rivet nut and a first bolt. The first rivet nut is installed on the expansion beam 13 and the base plate 121 and partially extends into the first cavity 131. The first bolt is connected to the first rivet nut.

[0086] The second connector 14b includes a second rivet nut 141b and a second bolt 142b. The second rivet nut 141b is installed on the expansion beam 13 and the base plate 121 and partially extends into the second cavity 132. The second bolt 142b is connected to the second rivet nut 141b.

[0087] The bottom wall of the first cavity 131 is connected to the base plate 121 by the cooperation of the first bolt and the first rivet nut. The bottom wall of the second cavity 132 is connected to the base plate 121 by the cooperation of the second bolt 142b and the second rivet nut 141b.

[0088] In other embodiments not shown, at least one of the first connector 14a and the second connector 14b may be made of screws and hexagonal nuts; or, at least one of the first connector 14a and the second connector 14b may be made of rivets; or, the first connector 14a and the second connector 14b may be made of other structures that can achieve a stable connection between the two components.

[0089] According to some embodiments of this application, referring to Figures 5-7, a protrusion 1212 corresponding to the position of the glue groove 1211 is formed on the side of the base plate 121 away from the expansion beam 13.

[0090] At this time, the base plate 121 can be stamped to form the corresponding glue groove 1211 and convex 1212 structure, so as to facilitate the forming of the glue groove 1211.

[0091] According to some embodiments of this application, this application also provides an electrical device including a battery of any of the above-described schemes, and the battery is used to provide electrical energy to the electrical device.

[0092] The electrical equipment can be any of the aforementioned battery-using devices or systems.

[0093] According to some embodiments of this application, referring to Figures 2, 4 to 7, this application provides a battery device 100, whose housing 10 includes a first part 11 and a second part 12. The second part 12 serves as a lower housing and includes a bottom plate 121 and side panels 122 arranged around the outer periphery of the bottom plate 121. The bottom plate 121 is used to support battery cells 20 along a first direction z. The first part 11 serves as a cover, covering the lower housing along the first direction z.

[0094] The housing 10 also includes an expansion beam 13 extending along the second direction x. The interior of the expansion beam 13 forms a first cavity 131 and a second cavity 132 spaced apart 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 base plate 121 via a first connector 14a and an adhesive 15. The bottom wall of the second cavity 132 is connected to the base plate 121 via a second connector 14b. Both the first connector 14a and the second connector 14b are composed of rivet nuts and bolts.

[0095] The base plate 121 is formed by stamping with a recessed adhesive groove 1211 that is recessed away from the expansion beam 13, and the adhesive 15 is disposed in the adhesive groove 1211. The adhesive 15 is a two-component structural adhesive 2KTSA0904C.

[0096] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, comprising: Battery cell; A housing for accommodating the battery cells, the housing including a base plate and an expansion beam, the base plate for supporting the battery cells along a first direction, and the expansion beam connected to the base plate by a connector; An adhesive is provided between the expansion beam and the base plate, and the expansion beam is connected to the base plate through the adhesive.

2. The battery device of claim 1, wherein, The base plate is provided with a groove that is recessed away from the expansion beam, and the adhesive is disposed in the groove.

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

4. The battery device according to claim 2 or 3, wherein 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 spaced apart 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 base plate through the colloid. The first direction, the second direction and the third direction are perpendicular to each other.

5. The battery device of claim 4, wherein, The connectors are provided in multiple ways, including a first connector and a second connector. The bottom wall of the first cavity is connected to the bottom plate through the first connector, and the bottom wall of the second cavity is connected to the bottom plate through the second connector.

6. The battery device of claim 5, wherein, The first connector is provided in multiple ways, and the glue groove is provided in multiple ways. The multiple glue grooves are spaced apart along the second direction, and at least one first connector is provided between each two adjacent glue grooves.

7. The battery device of claim 6, wherein, At least one second connector is provided in the lateral direction of the glue groove along the third direction.

8. The battery device of any one of claims 5-7, wherein, The first connector includes a first rivet nut and a first bolt. The first rivet nut is installed on the expansion beam and the base plate and extends partially into the first cavity. The first bolt is connected to the first rivet nut. And / or, The second connector 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 of any one of claims 2-8, wherein, The bottom plate has a protrusion on the side opposite to the expansion beam that corresponds to the position of the glue groove.

10. An electrical device, comprising: Includes the battery device as described in any one of claims 1-9.

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