Battery device and electric device

Abstract

The application is suitable for the technical field of batteries, and provides a battery device and a power utilization device. The battery device comprises a box body, a battery monomer assembly, a limiting beam and a connecting support. An accommodating space is formed in the box body. The battery monomer assembly is arranged in the accommodating space. The limiting beam is arranged in the accommodating space and extends along a first direction. The limiting beam is located at one end of the battery monomer assembly along a second direction. The first direction is perpendicular to the second direction. The limiting beam has a first surface which contacts the battery monomer assembly. The connecting support connects the limiting beam and the box body, and the connecting support is arranged to avoid the first surface. The battery device and the power utilization device provided by the application can make the connecting support arranged without occupying the arrangement space of the battery monomer.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of batteries, and particularly relates to a battery device and a power utilization device. BACKGROUND

[0002] The limiting beam is generally provided separately from the box body. The limiting beam is connected to the inner wall of the box body through bolts, connecting brackets and the like. The connecting bracket is generally arranged outside the limiting beam and connected to the inner wall of the box body and the limiting beam through bolts. Such an arrangement causes the part of the bolt exposed outside the limiting beam and the connecting bracket to occupy the space originally used for placing the battery monomer in the box body, thereby affecting the placement of the battery monomer. CONTENT OF THE UTILITY MODEL

[0003] In view of the above problems, the application provides a battery device and a power utilization device, which aims to make the arrangement of the connecting bracket not occupy the arrangement space of the battery monomer.

[0004] In the first aspect, the embodiments of the application provide a battery device, which comprises a box body, a battery monomer assembly, a limiting beam and a connecting bracket, and the box body forms an accommodation space; the battery monomer assembly is arranged in the accommodation space; the limiting beam is arranged in the accommodation space and extends along a first direction, and the limiting beam is located at one end of the battery monomer assembly along a second direction, and the first direction is perpendicular to the second direction; the limiting beam has a first surface, and the first surface contacts the battery monomer assembly; the connecting bracket connects the limiting beam and the box body, and the connecting bracket is arranged to avoid the first surface.

[0005] The battery device provided by the embodiments of the application changes the arrangement position of the connecting bracket, so that the connecting bracket is arranged to avoid the surface (i.e. the first surface) of the limiting beam contacting the battery monomer, which can make the arrangement of the connecting bracket not affect the arrangement of the battery monomer and not occupy the arrangement space of the battery monomer.

[0006] In some possible implementation manners, the limiting beam has an inner cavity, part of the connecting bracket is arranged in the inner cavity and connected to the limiting beam, and part of the connecting bracket is located outside the inner cavity and connected to the inner wall of the box body.

[0007] In the embodiment, part of the connecting bracket is arranged in the inner cavity of the limiting beam, which is beneficial to reduce the space occupation of the connecting bracket in the box body, thereby avoiding the battery monomer.

[0008] In some possible implementation manners, the limiting beam comprises a first wall and a second wall which are arranged at intervals along the second direction, an inner cavity is formed between the first wall and the second wall, and a first surface is formed on the surface of the battery monomer assembly and faces at least one of the first wall and the second wall; the connecting support comprises a first connecting portion, a second connecting portion and a reinforcing portion, a part of the first connecting portion is arranged in the inner cavity and connected with the first wall, another part of the first connecting portion is located outside the inner cavity, a part of the second connecting portion is arranged in the inner cavity and connected with the second wall, another part of the second connecting portion is located outside the inner cavity, and at least part of the reinforcing portion is arranged in the inner cavity and connected with the first connecting portion and the second connecting portion.

[0009] The connecting support provided in the embodiment can not only realize the connection between the limiting beam and the box body, but also improve the capacity of the limiting beam to bear the expansion force.

[0010] In some possible implementation manners, the reinforcing portion comprises a first reinforcing wall, a second reinforcing wall and a third connecting portion, the first reinforcing wall is attached to and connected with the first connecting portion, the second reinforcing wall is attached to and connected with the second connecting portion, the first reinforcing wall and the second reinforcing wall are arranged at intervals, and the third connecting portion connects the first reinforcing wall and the second reinforcing wall.

[0011] The reinforcing portion provided in the embodiment can have a larger contact area with the first connecting portion and the second connecting portion, so that the combined structure composed of the reinforcing portion, the first connecting portion and the second connecting portion is stable in structure.

[0012] In some possible implementation manners, the first reinforcing wall and the first connecting portion form a first combined structure, the second reinforcing wall and the second connecting portion form a second combined structure, and the first combined structure and the second combined structure are connected with the first wall and the second wall through first fasteners respectively.

[0013] The first combined structure and the second combined structure are connected with the side wall of the limiting beam through the first fasteners respectively in the embodiment, so that the connecting support has more connection points with the limiting beam, and the connection between the two is stable.

[0014] In some possible implementation manners, the first surface is provided with a receiving groove, and the part of the first fastener protruding from the outer surface of the first wall is arranged in the receiving groove.

[0015] The receiving groove is arranged, so that the part of the first fastener protruding from the outer surface of the first wall is arranged not to protrude from the plane in which the first surface is located, so that the first fastener can avoid the battery monomer and does not occupy the arrangement space of the battery monomer.

[0016] In some possible implementation manners, the limiting beam further includes a reinforcing member connecting the first wall and the second wall, and the reinforcing member is provided with a plurality of reinforcing members, the plurality of reinforcing members are arranged at intervals along a third direction of the limiting beam, and the first direction, the second direction and the third direction are perpendicular to each other, and the reinforcing portion is attached to and connected with one of the reinforcing members.

[0017] The connecting support can be arranged in a certain region of the inner cavity according to the use requirement, so that the reinforcing portion in the connecting support is attached to and connected with one of the reinforcing members. In this way, the designer can reasonably set the mounting position of the connecting support according to the stress analysis of the limiting beam, so that the connecting support can support the weak part of the limiting beam after being mounted, thereby enhancing the mechanical strength of the limiting beam.

[0018] In some possible implementation manners, along the third direction, one of the reinforcing members located at the non-outermost side is a first reinforcing member, and the reinforcing portion is connected with the first reinforcing member through a second fastener.

[0019] The shear stress of the limiting beam near the neutral axis (middle part in the third direction) is usually the largest, and the reinforcing portion is connected with the reinforcing member located at the middle part, which helps to enhance the structural strength of the limiting beam and improve the supporting effect, thereby improving the reliability of the battery device.

[0020] In some possible implementation manners, the box body includes a support member for supporting the battery monomer, and the limiting beam is connected with the support member; the plurality of reinforcing members includes a second reinforcing member, the second reinforcing member is a reinforcing member located on a side of the first reinforcing member away from the support member among all the reinforcing members, the second reinforcing member is provided with a first through hole for the second fastener connecting the reinforcing portion and the first reinforcing member to pass through; the first reinforcing member has a second through hole, an area of a cross section of the second through hole is smaller than an area of a cross section of the first through hole, and the second through hole is used for the part structure of the second fastener to pass through.

[0021] By adopting the scheme provided in the embodiment, the second fastener can pass through the reinforcing member located on the outer side of the first reinforcing member to be directly connected with the first reinforcing member and the reinforcing portion, so that the length of the second fastener is smaller, and the possibility of deformation of the second fastener is smaller when the second fastener is subjected to vibration or impact, thereby reducing the risk of loosening or damage of the second fastener and improving the reliability of the connection.

[0022] In some possible implementation manners, the first reinforcing wall, the second reinforcing wall and the third connecting portion are an integral molding structure.

[0023] The first reinforcing wall, the second reinforcing wall and the third connecting portion are an integral molding structure, which can make the structure of the reinforcing portion stable and facilitate preparation.

[0024] In some possible implementation manners, the box body comprises a support and a frame connected with the support, the support is configured to support the battery monomer, the support and the frame enclose a containing space, and the limiting beam is arranged in the containing space; and the part of the connecting support is connected with the frame.

[0025] The part of the connecting support is connected with the frame, so that the battery monomer can be arranged to avoid the installation of the connecting support.

[0026] In some possible implementation manners, the inner cavity has an opening facing the support, and the part of the connecting support is accommodated in the inner cavity through the opening.

[0027] The opening is arranged, so that when the battery device is assembled, the connecting support can be first installed on the box body, and then the limiting beam is installed in the box body, and the part of the connecting support is arranged in the inner cavity of the limiting beam. In this way, the combined structure of the connecting support and the box body can first undergo electrophoresis operation, and then be combined with the limiting beam, so that the limiting beam does not need to undergo electrophoresis operation, and the production cost of the battery device can be reduced. Electrophoresis, also known as electrocoating, is a process in which charged particles in an electrolyte migrate to the cathode under the action of an electric field, and then react with the alkaline substances generated on the surface of the cathode to form insoluble substances, which are deposited on the surface of the workpiece.

[0028] In some possible implementation manners, the box body comprises a support and a frame connected with the support, the support is configured to support the battery monomer, the support and the frame enclose a containing space, and the limiting beam is arranged in the containing space; the support is provided with a containing cavity and a mounting hole, the mounting hole is connected with the containing cavity and the containing space; the part of the connecting support is arranged in the mounting hole and is connected with the bottom wall of the limiting beam; and the part of the connecting support is arranged in the containing cavity and is connected with the support.

[0029] By adopting the scheme provided in this embodiment, the support is provided with the containing cavity and the mounting hole, so that the connecting support can be arranged at the bottom of the limiting beam, and the bottom of the limiting beam can be connected with the support of the box body through the connecting support. In this way, the battery monomer can be arranged to avoid the installation of the connecting support, so that the arrangement of the connecting support does not occupy the arrangement space of the battery monomer.

[0030] In some possible implementation manners, the connecting support is connected with the limiting beam through a third fastener, and the third fastener penetrates the limiting beam and the connecting support along a third direction of the limiting beam.

[0031] The connecting support is connected with the limiting beam through the third fastener, so that the connection structure of the connecting support and the limiting beam is stable. The third fastener is arranged at one side of the battery monomer and penetrates the limiting beam and the connecting support along the third direction of the limiting beam, so that the arrangement of the third fastener does not occupy the arrangement space of the battery monomer.

[0032] In some possible implementation manners, the third fastener comprises a first piece and a second piece that are threadedly connected, the second piece is connected to a side of the connecting bracket that is away from the limiting beam, and the first piece is threadedly connected to the second piece along the third direction and penetrates through the limiting beam and the connecting bracket.

[0033] The third fastener adopts the scheme provided in the embodiment, and the assembly of the limiting beam and the connecting bracket can be quickly implemented.

[0034] In some possible implementation manners, the connecting bracket is an integrally formed structure.

[0035] The connecting bracket is an integrally formed structure, and the structure of the connecting bracket is stable, which facilitates preparation.

[0036] In some possible implementation manners, at least part of the connecting bracket is welded to the box body.

[0037] At least part of the connecting bracket and the box body are connected by welding, and the connection between at least part of the connecting bracket and the box body is stable.

[0038] In a second aspect, the embodiment of the present application provides a power utilization device, comprising the battery device provided in any one of the above schemes.

[0039] The second aspect has the same effect as the first aspect, and details are not repeated here.

[0040] The above description is only a summary of the technical scheme of the present application, in order to more clearly understand the technical means of the present application, the specific embodiments of the present application can be implemented according to the content of the specification, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0041] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not meant to limit the present application. Moreover, the same reference numerals in the attached drawings indicate the same or similar elements. In the drawings:

[0042] Figure 1 A structural schematic diagram of a vehicle provided by some embodiments of the present application;

[0043] Figure 2 An exploded structural schematic diagram of a battery device provided by some embodiments of the present application;

[0044] Figure 3 A front view structural schematic diagram of a partial structure of a battery device provided by some embodiments of the present application;

[0045] Figure 4Partial structural schematic diagram of the combination structure of the limiting beam and the connecting support in the battery device provided for some embodiments of the present application;

[0046] Figure 5 Partial structural schematic diagram of the combination structure of the limiting beam and the connecting support in the battery device provided for some embodiments of the present application; Figure 3 Partial structural schematic diagram of the combination structure of the limiting beam and the connecting support in the battery device provided for some embodiments of the present application;

[0047] Figure 6 Partial structural schematic diagram of the combination structure of the limiting beam and the connecting support in the battery device provided for some embodiments of the present application; Figure 5 Partial structural schematic diagram of the combination structure of the limiting beam and the connecting support in the battery device provided for some embodiments of the present application;

[0048] Figure 7 Partial structural schematic diagram of the combination structure of the limiting beam and the connecting support in the battery device provided for some embodiments of the present application; Figure 3 Partial structural schematic diagram of the combination structure of the limiting beam and the connecting support in the battery device provided for some embodiments of the present application;

[0049] Figure 8 Partial structural schematic diagram of the combination structure of the limiting beam and the connecting support in the battery device provided for some embodiments of the present application;

[0050] Figure 9 Partial structural schematic diagram of the combination structure of the limiting beam and the connecting support in the battery device provided for some embodiments of the present application; Figure 8 Partial structural schematic diagram of the combination structure of the limiting beam and the connecting support in the battery device provided for some embodiments of the present application;

[0051] Figure 10 Partial structural schematic diagram of the combination structure of the limiting beam and the connecting support in the battery device provided for some embodiments of the present application; Figure 8 Partial structural schematic diagram of the combination structure of the limiting beam and the connecting support in the battery device provided for some embodiments of the present application;

[0052] Figure 11 Partial structural schematic diagram of the combination structure of the limiting beam and the connecting support in the battery device provided for some embodiments of the present application; Figure 10 Partial structural schematic diagram of the combination structure of the limiting beam and the connecting support in the battery device provided for some embodiments of the present application;

[0053] Figure 12 Partial structural schematic diagram of the combination structure of the limiting beam and the connecting support in the battery device provided for some embodiments of the present application;

[0054] Figure 13 Partial structural schematic diagram of the combination structure of the limiting beam and the connecting support in the battery device provided for some embodiments of the present application;

[0055] Figure 14 Partial structural schematic diagram of the combination structure of the limiting beam and the connecting support in the battery device provided for some embodiments of the present application; Figure 13 Partial structural schematic diagram of the combination structure of the limiting beam and the connecting support in the battery device provided for some embodiments of the present application.

[0056] The reference signs in the detailed description are as follows:

[0057] 1000, vehicle;

[0058] 100, battery device; 200, controller; 300, motor;

[0059] 10, box; 10a, accommodating space; 11, cover; 12, tray; 13, support; 14, frame; 15, accommodating cavity; 16, mounting hole; 20, battery cell; 30, limiting beam; 30a, first face; 30b, inner cavity; 30c, accommodating groove; 30d, opening; 31, first wall; 32, second wall; 33, reinforcing member; 33a, first through hole; 33b, second through hole; 40, connecting bracket; 41, first portion; 42, second portion; 43, first connecting portion; 44, second connecting portion; 45, reinforcing portion; 50, first fastener; 60, second fastener; 70, third fastener; 71, first piece; 72, second piece;

[0060] 451, first reinforcing wall; 452, second reinforcing wall; 453, third connecting portion;

[0061] X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0062] 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.

[0063] 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 terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application; the terms "include" and "have" and any variations thereof used in the specification and claims of the present application and the above description of the drawings are intended to cover the non-exclusive inclusion.

[0064] 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.

[0065] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0066] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of 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 existing alone, A and B existing together, and B existing alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are in an "or" relationship.

[0067] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0068] 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", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the embodiments of the present application and simplifying the description, and does 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.

[0069] In the description of the embodiments of the present application, unless otherwise specifically specified and limited, the technical terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanical connection, or it can be electrical connection; it can be directly connected, or it can be indirectly connected through an intermediate medium; it 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.

[0070] Unless otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form new technical solutions.

[0071] The capacity or power of a single battery cell is limited, and often cannot meet the use requirements of some devices or apparatuses. Therefore, many devices will be provided with multiple battery cells, which will expand the capacity or power of the battery through series connection, parallel connection or mixed connection of multiple battery cells. Multiple battery cells are stored in a box. During the charging and discharging process of the battery cell, the battery cell will swell due to the embedding or extraction of positive active material and negative active material, the accumulation of thickness of the battery cell system side reaction, and the peeling of the graphite sheet layer, which is easy to cause the box supporting the battery cell to deform, thereby affecting the sealing performance of the box. Therefore, in the related art, a limiting beam is arranged in the box to limit the swelling of the battery cell.

[0072] The limiting beam is generally provided separately from the box body. The limiting beam is connected to the inner wall of the box body through bolts, connecting brackets, etc. The connecting bracket is generally provided outside the limiting beam and is connected to the inner wall of the box body and the limiting beam through bolts. Such a setting will make the part of the bolt exposed outside the limiting beam and the connecting bracket occupy the space originally used for placing the battery monomer in the box body, affecting the placement of the battery monomer.

[0073] To improve the above problems, the battery device provided in the embodiments of the present application changes the setting position of the connecting bracket, so that the connecting bracket is arranged to avoid the surface (i.e. the first surface) of the limiting beam in contact with the battery monomer. In this way, the arrangement of the connecting bracket will not affect the arrangement of the battery monomer and will not occupy the arrangement space of the battery monomer.

[0074] The battery device disclosed in the embodiments of the present application can be used in a power consumption device using the battery device as a power source or various energy storage devices, energy storage systems and charging networks using the battery as an energy storage element. The power consumption device can be, but is not limited to, a mobile phone, a tablet computer, a notebook computer, an electric toy, a power tool, an electric vehicle, an electric car, a ship, a spacecraft, etc. Among them, 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 spaceships, etc.

[0075] The following embodiments take a power consumption device of an embodiment of the present application, i.e. a vehicle 1000, as an example for illustration.

[0076] Please refer to Figure 1 , Figure 1 The vehicle 1000 provided in some embodiments of the present application is a structural schematic diagram. The vehicle 1000 can be a fuel car, a gas car or a new energy car, and the new energy car can be a pure electric car, a hybrid car or a range extended car, etc. The vehicle 1000 is internally provided with a battery device 100, which can be arranged 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 an operating power source of the vehicle 1000. The vehicle 1000 can 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, for the working power demand of the vehicle 1000 during starting, navigation and driving.

[0077] In some embodiments of the present application, the battery device 100 can not only be used as an operating power source of the vehicle 1000, but also be used as a driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0078] Please refer to Figure 2 ,Figure 2 This 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.

[0079] The housing 10 provides a storage space for the battery cells 20, and can adopt various structures. In some embodiments, the housing 10 may include a cover 11 and a tray 12. The cover 11 covers the tray, and together with the tray 12, defines a storage space for accommodating the battery cells 20. The tray 12 may be a hollow structure with one open end, and the cover 11 may be a plate-like structure, covering the open side of the tray 12 so that the cover 11 and the tray 12 together define the storage space; the cover 11 and the tray 12 may also be hollow structures with side openings, with the open side of the cover 11 covering the open side of the tray 12. Of course, the housing 10 formed by the cover 11 and the tray 12 can be of various shapes, such as a circular through-hole, a cuboid, etc. The tray 12 is an important structural support component in the battery system, used to store and protect the battery cells, and also has a significant impact on the collision safety of the vehicle and the overall torsional and bending stiffness of the vehicle body.

[0080] Multiple battery cells 20 can be provided, and these cells can be connected in series, parallel, or mixed connection via a busbar component. Mixed connection refers to a configuration where multiple battery cells 20 are connected in both series and parallel configurations. Multiple battery cells 20 can be directly connected in series, parallel, or mixed connection, 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 mixed connection to form a battery module, and then multiple battery modules connected in series, parallel, or mixed connection to form a whole, 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. As an example, multiple battery cells 20 can form a battery module, which is an independent module formed by arranging and fixing multiple battery cells 20. As an example, a battery module can be formed by binding multiple battery cells 20 together with cable ties.

[0081] In this context, a battery cell 20 refers to the smallest unit that makes up a battery. Each battery cell 20 can be a secondary battery or a primary battery. A secondary battery is a battery cell that can be recharged after being discharged to activate the active materials and continue to be used. The battery cell 20 can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and this application embodiment is not limited to this. The battery cell can be in the form of a circular through-body, a flat body, a cuboid, or other shapes.

[0082] Please refer toFigure 3 , Figure 3 This is a front view schematic diagram of a partial structure of a battery device provided in some embodiments of this application. The battery device includes a housing 10, a battery cell assembly, a limiting beam 30, and a connecting bracket 40. A receiving space 10a is formed within the housing 10. The battery cell assembly 20 is disposed within the receiving space 10a. The limiting beam 30 is disposed within the receiving space 10a. The limiting beam 30 extends along a first direction X. The limiting beam 30 is located at one end of the battery cell assembly 20 along a second direction Y. The first direction X is perpendicular to the second direction Y. The limiting beam 30 has a first surface 30a. The first surface 30a contacts the battery cell assembly 20. The connecting bracket 40 is disposed at at least one end of the limiting beam 30 along the first direction X, connecting the limiting beam 30 and the housing 10, and the connecting bracket 40 is disposed abutting the first surface 30a.

[0083] A battery cell assembly is formed by connecting multiple battery cells in series, parallel, or in a mixed configuration.

[0084] The main function of the limiting beam 30 is to suppress the expansion of the battery cells and to protect and limit their movement. The limiting beam 30 can be a one-piece structure or composed of multiple parts. The first surface 30a is the sidewall of the limiting beam 30 that contacts the battery cell 20. It should be noted that most of the area of ​​the first surface 30a is used to contact the battery cell, while a small portion may not contact it, depending on the specific application requirements.

[0085] The limiting beam 30 is generally long and narrow, and the first direction mentioned above is the length direction of the limiting beam 30.

[0086] The second direction, Y, is perpendicular to the large surface area of ​​the battery cell. The large surface area is the surface with the largest surface area among all the outer surfaces of the battery cell, and it is generally the surface formed by the length and height directions of the battery cell.

[0087] The connecting bracket 40 is a bracket used to connect the limiting beam 30 and the box 10. It can be composed of one or more components, depending on the specific needs of use.

[0088] The setting of the connecting bracket 40 to avoid the first surface 30a means that the connecting bracket 40 needs to avoid the functional area of ​​the first wall 31 (such as the contact area with the battery cell 20), so that the setting of the connecting bracket 40 does not affect the setting of the battery cell 20 and does not occupy the setting space of the battery cell 20.

[0089] Specifically, the connecting bracket 40 can be set inside the limiting beam 30 or between the limiting beam 30 and the bottom surface of the box 10, depending on the usage requirements.

[0090] The battery device provided in this application embodiment changes the setting position of the connecting bracket 40 so that the connecting bracket 40 avoids the surface (i.e. the first surface 30a) where the limiting beam 30 contacts the battery cell 20. This ensures that the setting of the connecting bracket 40 does not affect the setting of the battery cell 20 and does not occupy the setting space of the battery cell 20.

[0091] like Figure 3 and Figure 4 As shown, Figure 4 This is a partial structural diagram of the combined structure of the limiting beam and the connecting bracket in a battery device provided in some embodiments of this application. In some embodiments, the limiting beam 30 also has an inner cavity 30b. A portion of the connecting bracket 40 is disposed in the inner cavity 30b and connected to the limiting beam 30. A portion of the connecting bracket 40 is located outside the inner cavity 30b and connected to the inner wall of the housing 10.

[0092] The limiting beam 30 also has an inner cavity 30b, which means that the interior of the limiting beam 30 is designed to be a hollow, porous or cavity structure filled with a specific material.

[0093] The connecting bracket 40 includes at least a first part 41 and a second part 42 that are connected to each other. This means that the connecting bracket 40 can consist only of the first part 41 and the second part 42, which are directly connected. Alternatively, in addition to the first part 41 and the second part 42, the connecting bracket 40 may also include other parts, such as a third part that connects the first part 41 and the second part 42. The specific details can be determined according to the usage requirements.

[0094] Both part 41 and part 42 are components of the connecting bracket 40. Part 41 is the portion of the connecting bracket 40 located within the inner cavity 30b of the limiting beam 30 and connected to the limiting beam 30. Part 42 is the portion of the connecting bracket 40 located outside the inner cavity 30b of the limiting beam 30 and connected to the inner wall of the housing 10.

[0095] The first part 41 can be welded or glued to the inner wall of the limiting beam 30, or connected by connectors (such as fasteners), depending on the specific needs of use.

[0096] The housing 10 generally includes a support member 13 and a frame 14. The support member 13 supports the battery cell 20, the frame 14, and the limiting beam 30, etc. The frame 14 is formed by connecting multiple side beams end to end. The frame 14 and the support member 13 form a receiving space 10a for accommodating the battery cell 20 and the limiting beam 30. The inner wall of the housing 10 can be the part of the support member 13 located within the receiving space 10a, or it can be the part of the frame 14 located within the receiving space 10a, depending on the usage requirements.

[0097] The second part 42 can be welded, glued, or connected to the inner wall of the housing 10 via connectors (such as fasteners), depending on the specific needs of use.

[0098] In this embodiment, a portion of the connecting bracket 40 is disposed in the inner cavity 30b of the limiting beam 30, which helps to reduce the space occupied by the connecting bracket 40 in the housing 10, thereby avoiding the battery cells.

[0099] like Figure 3 , Figure 5 and Figure 6 As shown, Figure 5 For the local structure in the battery device along Figure 3 Schematic diagram of the cross-sectional structure along line AA. Figure 6 For the local structure in the battery device along Figure 5 A cross-sectional view of the BB line shows that, in some embodiments, the limiting beam 30 includes a first wall 31 and a second wall 32 spaced apart along a second direction Y. An inner cavity 30b is formed between the first wall 31 and the second wall 32. At least one of the first wall 31 and the second wall 32 forms a first surface 30a on its surface facing the battery cell assembly. The connecting bracket 40 includes a first connecting portion 43, a second connecting portion 44, and a reinforcing portion 45. A portion of the first connecting portion 43 is disposed in the inner cavity 30b and connected to the first wall 31. Another portion of the first connecting portion 43 is located outside the inner cavity 30b. A portion of the second connecting portion 44 is disposed in the inner cavity 30b and connected to the second wall 32; another portion of the second connecting portion 44 is located outside the inner cavity 30b. At least a portion of the reinforcing portion 45 is disposed in the inner cavity 30b and connects the first connecting portion 43 and the second connecting portion 44.

[0100] In this embodiment, the limiting beam 30 may include only the first wall 31 and the second wall 32, or it may include other structures besides the first wall 31 and the second wall 32, such as a connecting structure connecting the first wall 31 and the second wall 32. The specific structure can be determined according to the usage requirements. It is understood that when the limiting beam 30 includes only the first wall 31 and the second wall 32, the two can be connected by the connecting bracket 40.

[0101] The first wall 31 and the second wall 32 are both sidewalls forming the limiting beam 30, and can be plates, thin-walled structures, or other structures, depending on the application requirements. The interval setting means that the first wall 31 and the second wall 32 are spaced apart in the first configuration. The first wall 31 and the second wall 32 form the inner cavity 30b of the limiting beam 30.

[0102] The first wall 31 and the second wall 32 can be set in parallel or at an angle, depending on the specific needs of use.

[0103] Since the limiting beam 30 can be located in the middle of the box 10 or near the end of the box 10, when the limiting beam 30 is located in the middle of the box 10, battery cells 20 are provided on both sides of the limiting beam 30, so the limiting beam 30 at this location has two first surfaces 30a; when the limiting beam 30 is located at the end of the box 10, the limiting beam 30 has battery cells 20 on only one side, but the limiting beam 30 at this location has one first surface 30a.

[0104] At least one of the first wall 31 and the second wall 32 is provided with a first surface 30a, including at least the following situations: First, the first wall 31 is provided with a first surface 30a; Second, the second wall 32 is provided with a first surface 30a; Third, both the first wall 31 and the second wall 32 are provided with a first surface 30a, in which case battery cells are provided on both sides of the limiting beam 30.

[0105] The first connecting part 43, the second connecting part 44, and the reinforcing part 45 are all components of the connecting bracket 40. They can be integrally formed or separately set and connected.

[0106] Both the first connecting part 43 and the second connecting part 44 are components that connect the limiting beam 30 and the box body 10. Their structures can be the same or different.

[0107] The reinforcing part 45 is the connecting part in the connecting bracket 40 that connects the first connecting part 43 and the second connecting part 44. This part can also enhance the ability of the first wall 31 to withstand expansion force.

[0108] At least one of the first connecting part 43, the second connecting part 44, and the reinforcing part 45 is connected to the limiting beam 30, including at least the following situations: First, the first connecting part 43 is connected to the limiting beam 30; Second, the second connecting part 44 is connected to the limiting beam 30; Third, the reinforcing part 45 is connected to the limiting beam 30; Fourth, both the first connecting part 43 and the second connecting part 44 are connected to the limiting beam 30; Fifth, both the second connecting part 44 and the reinforcing part 45 are connected to the limiting beam 30; Sixth, both the first connecting part 43 and the reinforcing part 45 are connected to the limiting beam 30; Seventh, all of the first connecting part 43, the second connecting part 44, and the reinforcing part 45 are connected to the limiting beam 30.

[0109] The connecting bracket 40 adopts the solution provided in this embodiment, which enables the connecting bracket 40 to not only connect the limiting beam 30 and the box 10, but also to improve the ability of the limiting beam 30 to withstand expansion force.

[0110] like Figure 6As shown, in some embodiments, the reinforcing portion 45 includes a first reinforcing wall 451, a second reinforcing wall 452, and a third connecting portion 453. The first reinforcing wall 451 is attached to and connected to the first connecting portion 453. The second reinforcing wall 452 is attached to and connected to the second connecting portion 453. The first reinforcing wall 451 and the second reinforcing wall 452 are spaced apart. The third connecting portion 453 connects the first reinforcing wall 451 and the second reinforcing wall 452.

[0111] In this embodiment, both the first reinforcing wall 451 and the second reinforcing wall 452 can be plates, thin-walled structures, or other structures, depending on the application requirements. The first connecting part 43, the second connecting part 44, and the third connecting part 453 can all be plates, thin-walled structures, blocks, or other structures, depending on the application requirements.

[0112] Fitting and connecting is a comprehensive assembly strategy that requires components to fit tightly (to ensure functional transfer) and connect reliably (to ensure structural stability).

[0113] The reinforcement part 45 adopts the solution provided in this embodiment, which can make the contact area between the reinforcement part 45 and the first connecting part 43 and the second connecting part 44 larger, thereby making the structure of the combined structure composed of the reinforcement part 45, the first connecting part 43 and the second connecting part 44 stable.

[0114] like Figure 6 As shown, in some embodiments, the first reinforcing wall 451 and the first connecting portion 43 form a first combined structure. The second reinforcing wall 452 and the second connecting portion 44 form a second combined structure. The first combined structure and the second combined structure are respectively connected to the sidewalls of the limiting beam 30 via a first fastener 50.

[0115] The first fastener 50 is a connector that connects the first combined structure and the side wall of the limiting beam 30, or a connector that connects the second combined structure and the side wall of the limiting beam 30, and may include, but is not limited to, bolts, rivets, etc.

[0116] Using the solution provided in this embodiment, the first combined structure and the second combined structure are respectively connected to the side wall of the limiting beam 30 through the first fastener 50, which can make the connection points between the connecting bracket 40 and the limiting beam 30 more, so that the connection between the two is stable.

[0117] In some embodiments, the first surface 30a has a first region and a second region arranged along its length. The first region is used to contact the battery cell 20. The first region is connected to the side wall of the housing 10 through the second region. A first fastener 50 is disposed in the second region.

[0118] The length direction of the first face 30a is parallel to the first direction X and perpendicular to the second direction Y.

[0119] The first and second regions arranged along their own length direction refer to the first and second regions being arranged sequentially or alternately along the length direction of the first surface 30a. For example, the first surface 30a may include only one first region and one second region, or it may include one first region and two second regions. However, if the first surface 30a includes one first region and two second regions, the first and second regions are arranged along the length direction of the first surface 30a in the manner of arranging the second regions, first regions, and second regions.

[0120] The second area is not in contact with the battery cell 20 and is the gap between the battery cell 20 and the side wall of the housing 10. This prevents the battery cell 20 from directly contacting the side wall of the housing 10, so that when the side wall of the housing 10 is subjected to external impact, the impact will not be directly transmitted to the battery cell 20 through the side wall of the housing 10, thereby reducing the risk of damage to the battery cell 20.

[0121] Using the solution provided in this embodiment, the first fastener 50 is located in the second area, which can avoid the setting of the battery cell 20 and does not occupy the arrangement space of the battery cell 20.

[0122] like Figure 6 As shown, in some embodiments, the first surface 30a is provided with a receiving groove 30c. The portion of the first fastener 50 protruding from the outer surface of the first wall 31 is disposed within the receiving groove 30c.

[0123] The receiving groove 30c is a groove structure that accommodates the portion of the first fastener 50 that protrudes from the outer surface of the first wall 31, and its size can be determined according to the size of the portion of the first fastener 50 that protrudes from the outer surface of the first wall 31.

[0124] The arrangement of the receiving groove 30c allows the portion of the first fastener 50 that protrudes from the outer surface of the first wall 31 to not protrude from the plane of the first surface 30a, thereby allowing the first fastener 50 to avoid the battery cell 20 and not occupy the arrangement space of the battery cell 20.

[0125] like Figure 6 and Figure 7 As shown, in some embodiments, the first fastener 50 includes a riveting member.

[0126] Riveted components are mechanical connection assemblies consisting of rivets and related processes, used to permanently or semi-permanently fasten two or more parts. It should be noted that... Figure 6 and Figure 7 The riveted parts are in an unriveted or initial state.

[0127] Using the solution provided in this embodiment, the first combined structure formed by the first reinforcing wall 451 and the first connecting part 43 is riveted to the side wall of the limiting beam 30 by the first fastener 50, and the second combined structure formed by the second reinforcing wall 452 and the second connecting part 44 is riveted to the side wall of the limiting beam 30 by the first fastener 50. This results in high shear and tensile strength between the connecting bracket 40 and the limiting beam 30, no risk of loosening, and no need for periodic retightening, making it suitable for high-frequency vibration environments.

[0128] like Figure 8 and Figure 9 As shown, Figure 8 This is a front view schematic diagram of a partial structure of a battery device provided in some other embodiments of this application. Figure 9 For the local structure in the battery device along Figure 8 A cross-sectional view of the middle DD line shows that, in some embodiments, the limiting beam 30 further includes reinforcing members 33 connecting the first wall 31 and the second wall 32. Multiple reinforcing members 33 are provided. These reinforcing members 33 are spaced apart along the third direction Z of the limiting beam 30. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other. The reinforcing part 45 is attached to and connected to one of the reinforcing members 33.

[0129] The reinforcing member 33 is a plate or thin-walled structure that connects the first wall 31 and the second wall 32 in the limiting beam 30.

[0130] The first wall 31, the second wall 32, and the reinforcing member 33 form the inner cavity 30b of the limiting beam 30.

[0131] The reinforcing part 45 and the reinforcing member 33 can be connected by welding, gluing, or by bolts or other connecting parts, depending on the application requirements.

[0132] The connecting bracket 40 can be installed in a certain area of ​​the inner cavity 30b as needed, so that the reinforcing part 45 in the connecting bracket 40 is closely attached to and connected with one of the reinforcing members 33. This allows the designer to reasonably set the installation position of the connecting bracket 40 according to the stress analysis of the limiting beam 30, so that after the connecting bracket 40 is installed, it can support the weak parts of the limiting beam 30, thereby enhancing the mechanical strength of the limiting beam 30.

[0133] like Figure 9 As shown, in some embodiments, the reinforcing part 45 and the reinforcing member 33 are connected by a second fastener 60.

[0134] The structure of the second fastener 60 can be the same as or different from that of the first fastener 50, depending on the application requirements. For example, both can be bolts or rivets, or one can be a rivet and the other a bolt.

[0135] The reinforcing part 45 and the reinforcing member 33 are connected by the second fastener 60, which makes the connection between the reinforcing part 45 and the reinforcing member 33 tight and the connection structure stable.

[0136] like Figure 9 As shown, in some embodiments, along the third direction Z, one of the multiple reinforcing members 33 that is not the outermost is the first reinforcing member. The reinforcing part 45 is connected to the first reinforcing member by a second fastener 60.

[0137] One of the reinforcing members 33 that is not the outermost one refers to one of the reinforcing members 33 among the multiple reinforcing members 33 excluding the reinforcing members 33 located at the top and bottom in the third direction Z. It is also one of the reinforcing members 33 that connects the middle part of the first wall 31 and the middle part of the second wall 32.

[0138] The shear stress of the limiting beam 30 is usually greatest near the neutral axis (the middle of the third direction). The reinforcement 45 is connected to the reinforcement 33 located in the middle, which helps to enhance the structural strength of the limiting beam 30 and improve the support effect, thereby improving the reliability of the battery device.

[0139] like Figure 9 to Figure 11 As shown, Figure 10 for Figure 8 The diagram shows a partial three-dimensional structural representation of the battery device. Figure 11 for Figure 10 The enlarged structural diagram at point A shows that in some embodiments, the housing 10 includes a support member 13. The support member 13 supports the battery cell 20. A limiting beam 30 is connected to the support member 13. Among the multiple reinforcing members 33, a second reinforcing member is included. The second reinforcing member is the one located on the side of the first reinforcing member away from the support member 13. The second reinforcing member has a first through hole 33a. The first through hole 33a allows a second fastener 60 connecting the reinforcing part 45 and the first reinforcing member to pass through. The first reinforcing member has a second through hole 33b. The cross-sectional area of ​​the second through hole 33b is smaller than the cross-sectional area of ​​the first through hole 33a. The second through hole 33b allows a portion of the structure of the second fastener 60 to pass through.

[0140] The support member 13 is generally the bottom wall of the box 10, or it can be a combination of the bottom wall and other structures (such as protective plates).

[0141] The connection between the limiting beam 30 and the support member 13 means that the two can be connected or they can only make contact without being connected, depending on the needs of use.

[0142] The first through hole 33a and the second through hole 33b are both through holes that penetrate the reinforcing member 33 along the thickness direction of the reinforcing member 33.

[0143] The area of ​​the cross section refers to the total area of ​​the first through hole 33a or the second through hole 33b on the cross section perpendicular to its axis or main extension direction.

[0144] The first through hole 33a is used to allow the entire second fastener 60 to pass through. If the second fastener 60 is a bolt, the first through hole 33a must allow not only the bolt thread to pass through, but also the bolt nut to pass through.

[0145] The second through hole 33b is used for a portion of the structure of the second fastener 60 to pass through. This means that when the second fastener 60 is a bolt, rivet, or other component, the second through hole 33b only needs to allow the rod portion of these components to pass through, and does not need to allow the cap portion of these components to pass through.

[0146] By adopting the solution provided in this embodiment, the second fastener 60 can pass through the reinforcing member 33 located outside the first reinforcing member and directly connect to the first reinforcing member and the reinforcing part 45. This makes the length of the second fastener 60 smaller, and the possibility of the second fastener 60 deforming when subjected to vibration or impact is smaller, thereby reducing the risk of the second fastener 60 loosening or being damaged and improving the reliability of the connection.

[0147] Figure 12 This is a schematic diagram of the structure of the connecting bracket in a battery device provided in some other embodiments of this application.

[0148] like Figure 12 As shown, in some embodiments, the first reinforcing wall 451, the second reinforcing wall 452, and the third connecting portion 453 are integrally formed structures.

[0149] The first reinforcing wall 451, the second reinforcing wall 452 and the third connecting part 453 are integrally formed structures, meaning that the reinforcing part 45 is made by integral forming processes such as casting and stamping.

[0150] The first reinforcing wall 451, the second reinforcing wall 452, and the third connecting part 453 are integrally formed, which makes the structure of the reinforcing part 45 stable and easy to manufacture.

[0151] like Figure 10 As shown, in some embodiments, the housing 10 includes a support member 13 and a frame 14 connected to the support member 13. The support member 13 supports the battery cell 20. The support member 13 and the frame 14 enclose a receiving space 10a. A limiting beam 30 is disposed within the receiving space 10a. A portion of the connecting bracket 40 is connected to the frame 14.

[0152] The connecting bracket 40 is connected to the frame 14, which can avoid the setting of the battery cell 20, so that the arrangement of the battery cell 20 is not affected by the installation of the connecting bracket 40.

[0153] likeFigure 4 As shown, in some embodiments, the inner cavity 30b has an opening 30d facing the support member 13. A portion of the connecting bracket 40 is received in the inner cavity 30b through the opening 30d.

[0154] The opening 30d can be made by cutting, stamping or other methods after the limiting beam 30 is made, or it can be made directly during the preparation of the limiting beam 30. The size of the opening 30d can be determined according to the size of the part of the connecting bracket 40 that extends into the inner cavity 30b. As long as the part of the connecting bracket 40 that extends into the inner cavity 30b can enter the inner cavity 30b through the opening 30d, it is acceptable.

[0155] The opening 30d allows the connecting bracket 40 to be installed onto the housing 10 first, followed by the installation of the limiting beam 30 into the housing 10, with a portion of the connecting bracket 40 entering the inner cavity 30b of the limiting beam 30. This allows the connecting bracket 40 and housing 10 to undergo electrophoresis before being combined with the limiting beam 30, eliminating the need for the limiting beam 30 to undergo electrophoresis itself, thus reducing the production cost of the battery device. Electrophoresis, also known as electrocoating, is the process where, under the influence of voltage applied to the anode and cathode, charged paint ions migrate to the cathode and react with alkaline substances generated on the cathode surface to form an insoluble substance, which is then deposited on the workpiece surface.

[0156] like Figure 10 , Figure 13 and Figure 14 As shown, Figure 13 This is a front view schematic diagram of a partial structure of a battery device provided in some other embodiments of this application. Figure 14 For the local structure in the battery device along Figure 13 A cross-sectional view of the EE line is shown. In some embodiments, the housing 10 includes a support member 13 and a frame 14 connected to the support member 13. The support member 13 supports the battery cell 20. The support member 13 and the frame 14 enclose a receiving space 10a. A limiting beam 30 is disposed within the receiving space 10a. The support member 13 has a receiving cavity 15 and a mounting hole 16. The mounting hole 16 connects the receiving cavity 15 and the receiving space 10a. A portion of the connecting bracket 40 is disposed within the mounting hole 16 and is fitted and connected to the bottom wall of the limiting beam 30. A portion of the connecting bracket 40 is disposed within the receiving cavity 15 and connected to the support member 13.

[0157] A receiving cavity 15 is located inside the support member 13 to accommodate a portion of the connecting bracket 40. A mounting hole 16 is a connecting structure between the receiving cavity 15 and the receiving space 10a. The mounting hole 16 is larger than, at least in length and width, the corresponding dimensions of the portion of the connecting bracket 40 located within the mounting hole 16.

[0158] Adopting the solution provided by this embodiment, the support member 13 is provided with a receiving cavity 15 and a mounting hole 16, so that the connecting bracket 40 can be arranged at the bottom of the limiting beam 30, and the bottom of the limiting beam 30 can be connected to the support member 13 of the box body 10 through the connecting bracket 40. This can avoid the arrangement of the battery cell 20, so that the arrangement of the connecting bracket 40 does not occupy the layout space of the battery cell 20.

[0159] As Figure 14 shown, in some embodiments, the connecting bracket 40 is connected to the limiting beam 30 through a third fastener 70. The third fastener 70 penetrates through the limiting beam 30 and the connecting bracket 40 along the third direction Z of the limiting beam 30.

[0160] The structure of the third fastener 70 can be the same as or different from that of the first fastener 50 or the second fastener 60, and can be determined according to specific usage requirements.

[0161] The connecting bracket 40 is connected to the limiting beam 30 through the third fastener 70, which can make the connection structure between the connecting bracket 40 and the limiting beam 30 stable. The third fastener 70 penetrates through the limiting beam 30 and the connecting bracket 40 along the third direction of the limiting beam 30, that is, the third fastener 70 is arranged on one side of the battery cell 20, which can make the arrangement of the third fastener 70 not occupy the layout space of the battery cell 20.

[0162] In some embodiments, the connecting bracket 40 is in a "U" shape or a structure similar to a "U" shape. That is, both ends of the connecting bracket 40 are respectively arranged on both sides of the mounting hole.

[0163] In this way, compared with the case where only some ends of the connecting bracket 40 extend to the mounting hole in the same connecting bracket 40, the contact area between the connecting bracket 40 and the box body 10 can be increased, and the stability of the connection between the connecting bracket 40 and the box body 10 can be improved.

[0164] As Figure 14 shown, in some embodiments, the third fastener 70 includes a first body 71 and a second body 72 that are threadedly connected. The second body 72 is connected to the side of the connecting bracket 40 facing away from the limiting beam 30. The first body 71 penetrates through the limiting beam 30 and the connecting bracket 40 along the third direction and is threadedly connected to the second body 72.

[0165] The first body 71 can be a rod-shaped structure with threads such as a bolt or a screw rod. The second body 72 can be a structure with threads such as a nut or a base.

[0166] The second body 72 can be fixed to the connecting bracket 40 by welding, gluing, plugging, etc.

[0167] The third fastener 70 adopts the solution provided in this embodiment, which is convenient for installation and disassembly, and allows the assembly of the limiting beam 30 and the connecting bracket 40 to be realized quickly.

[0168] In some embodiments, the connecting bracket 40 is a one-piece molded structure.

[0169] The connecting bracket 40 is a one-piece molded structure, meaning that the connecting bracket 40 is made by one-piece molding processes such as casting and stamping.

[0170] The connecting bracket 40 is a one-piece molded structure, which makes the connecting bracket 40 structurally stable and easy to manufacture.

[0171] In some embodiments, at least a portion of the connecting bracket 40 is welded to the housing 10.

[0172] At least a portion of the connecting bracket 40 is welded to the housing 10, which makes the connection between at least a portion of the connecting bracket 40 and the housing 10 stable.

[0173] In some embodiments, the connecting bracket 40 is spot welded to the housing 10.

[0174] Spot welding is a welding method that uses the high heat generated by a momentary short circuit of a high-current direct current.

[0175] The connecting bracket 40 and the housing 10 are connected by spot welding, which can reduce the risk of the housing 10 being welded through.

[0176] According to some embodiments of this application, this application also provides an electrical device, including a battery device provided by any of the above solutions. The battery device is used to store or provide electrical energy.

[0177] The electrical device can be any of the aforementioned battery-powered devices or systems.

[0178] The electrical device provided in this application embodiment includes the battery device described above and can achieve the same effect, which will not be repeated here.

[0179] like Figure 3 to Figure 14 As shown, some embodiments of this application provide a battery device. The battery device includes a housing 10, and limiting beams 30 and connecting brackets 40, all disposed within the housing 10. The limiting beams 30 are disposed within the housing 10 and connected to the housing 10 via the connecting brackets 40. The limiting beams 30 have a first surface 30a. The first surface 30a is used to contact a single battery cell 20. The connecting brackets 40 are disposed to avoid the first surface 30a.

[0180] The portion of the connecting bracket 40 that is connected to the limiting beam 30 does not occupy space outside the limiting beam 30, and is hidden inside or below the limiting beam 30, so that it will not interfere with the battery cell 20 due to tolerance reasons.

[0181] The connecting bracket 40 can be configured in the following three ways.

[0182] First setup method

[0183] The connecting bracket 40 is located at the end of the limiting beam 30 in the first direction X and is welded to the side wall of the housing 10. The connecting bracket 40 is composed of three sheet metal parts welded together. The three sheet metal parts are two L-shaped plates and one U-shaped plate. The vertical plates of the two L-shaped plates are respectively attached to the two side walls of the limiting beam 30 and connected by riveting or bolts; the horizontal plates are attached to the side walls of the housing 10 and connected by spot welding. The L-shaped plates and the U-shaped plates are connected by arc welding. This avoids the inner cavity 30b of the limiting beam 30 being an elastic connection, and reduces the risk of uncoupling and twisting when the L-shaped plates and the limiting beam 30 are bolted together. The horizontal plate of the L-shaped plate is designed with a 5-degree stamping angle. If the L-shaped plates are connected to the limiting beam 30 by bolts, the bolts can pass entirely through the side wall of the limiting beam 30 and the mounting holes 16 on the L-shaped plates. If the L-shaped plates are connected to the limiting beam 30 by riveting (rivets), the mounting holes 16 on the two L-shaped plates need to be staggered to avoid interference from the rivet heads. The outer surface of the side wall where the limiting beam 30 connects to the rivet is provided with a receiving groove 30c to prevent the flange of the rivet from protruding from the surface of the limiting beam 30 and interfering with the battery cell 20.

[0184] The bottom wall of the limiting beam 30 has an opening 30d. During assembly, the connecting bracket 40 can be welded to the housing 10 first, and then the assembly of the two can be electrophoretically coated. After that, the limiting beam 30 is installed into the housing 10 from top to bottom, and then the limiting beam 30 is connected to the connecting bracket 40.

[0185] The use of U-shaped components can improve local load-bearing capacity and enhance the structural strength of the connecting bracket 40. The connecting bracket 40 is connected to the limiting beam 30 by rivets, ensuring a reliable connection between the connecting bracket 40 and the limiting beam 30.

[0186] The second setting method

[0187] The connecting bracket 40 is also located at the end of the limiting beam 30 in the first direction X and is connected to the side wall of the box body 10, with an overall "U" shape. The flange of the connecting bracket 40 outside the limiting beam 30 is spot-welded to the box body 10, and the structure inside the limiting beam 30 mates with the limiting beam 30. Bolt mounting holes are provided at corresponding parts of the limiting beam 30 and the connecting bracket 40. The inner ribs at the contact part between the limiting beam 30 and the connecting bracket 40 need to be milled off.

[0188] The third setting method

[0189] A connecting bracket 40 is disposed at the bottom of the limiting beam 30. A portion of the connecting bracket 40 is located inside the support member 13 of the housing 10. A nut is projected onto the connecting bracket 40. The connecting bracket 40 is connected to the limiting beam 30 by bolts that pass through the limiting beam 30 and the connecting bracket 40 in a third direction along the limiting beam 30. The bolts and nuts are threaded together.

[0190] The support member 13 has a receiving cavity 15 and a mounting hole 16 that connects the receiving cavity 15 and the receiving space 10a inside the box 10. A part of the connecting bracket 40 passes through the mounting hole 16 and contacts the limiting beam 30.

[0191] The aforementioned connecting brackets 40 optimize the installation space of the battery unit, improving charging capacity and range. The battery unit adopts a multi-level reinforced structure to enhance its local load-bearing capacity. Furthermore, the battery unit has a compact structure and reliable installation. The connecting brackets 40 and the housing 10 are all spot-welded, avoiding the sealing failure issues caused by arc welding penetrating the housing 10. The battery unit has a reasonable structural design, is easy to assemble, adopts a modular design for easy maintenance, and optimizes the structural layout considering functional requirements.

[0192] The solution provided in this embodiment effectively solves the key technical challenges of new energy commercial vehicles through reasonable structural design and innovative connection methods, and has good promotion and application value.

[0193] 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 therein. 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, characterized in that, include: A housing, wherein an accommodating space is formed within the housing; A battery cell assembly, wherein the battery cell assembly is disposed within the accommodating space; A limiting beam is disposed within the accommodating space. The limiting beam extends along a first direction and is located at one end of the battery cell assembly along a second direction, wherein the first direction is perpendicular to the second direction. The limiting beam has a first surface that contacts the battery cell assembly. A connecting bracket connects the limiting beam and the box body, and the connecting bracket is disposed to avoid the first surface.

2. The battery device as claimed in claim 1, characterized in that, The limiting beam has an inner cavity, and a portion of the connecting bracket is disposed in the inner cavity and connected to the limiting beam; and a portion of the connecting bracket is located outside the inner cavity and connected to the inner wall of the box.

3. The battery device as claimed in claim 2, characterized in that, The limiting beam includes a first wall and a second wall spaced apart along the second direction, with the inner cavity formed between the first wall and the second wall, and at least one of the first wall and the second wall having a surface facing the battery cell assembly forming the first surface; The connecting bracket includes a first connecting part, a second connecting part, and a reinforcing part. A portion of the first connecting part is disposed in the inner cavity and connected to the first wall; another portion of the first connecting part is located outside the inner cavity. A portion of the second connecting part is disposed in the inner cavity and connected to the second wall; another portion of the second connecting part is located outside the inner cavity. At least a portion of the reinforcing part is disposed in the inner cavity and connects the first connecting part and the second connecting part.

4. The battery device as claimed in claim 3, characterized in that, The reinforcing part includes a first reinforcing wall, a second reinforcing wall, and a third connecting part. The first reinforcing wall is attached to and connected to the first connecting part, and the second reinforcing wall is attached to and connected to the second connecting part. The first reinforcing wall and the second reinforcing wall are spaced apart. The third connecting part connects the first reinforcing wall and the second reinforcing wall.

5. The battery device as claimed in claim 4, characterized in that, The first reinforcing wall and the first connecting portion form a first combined structure, and the second reinforcing wall and the second connecting portion form a second combined structure. The first combined structure and the second combined structure are respectively connected to the first wall and the second wall by a first fastener.

6. The battery device as claimed in claim 5, characterized in that, The first surface is provided with a receiving groove, and the portion of the first fastener protruding from the outer surface of the first wall is disposed in the receiving groove.

7. The battery device as claimed in claim 3, characterized in that, The limiting beam also includes a reinforcing member connecting the first wall and the second wall. Multiple reinforcing members are provided, and the multiple reinforcing members are spaced apart along a third direction. The first direction, the second direction, and the third direction are perpendicular to each other. The reinforcing part is attached to and connected to one of the reinforcing members.

8. The battery device as claimed in claim 7, characterized in that, Along the third direction, one of the reinforcements that is not the outermost one is the first reinforcement; the reinforcement is connected to the first reinforcement by a second fastener.

9. The battery device as claimed in claim 8, characterized in that, The housing includes a support member for supporting the battery cell, and the limiting beam is connected to the support member. Among the plurality of reinforcing members is a second reinforcing member, which is any one of the reinforcing members located on the side of the first reinforcing member away from the support member. The second reinforcing member has a first through hole for a second fastener connecting the reinforcing part and the first reinforcing member to pass through. The first reinforcing member has a second through hole, the cross-sectional area of ​​which is smaller than the cross-sectional area of ​​the first through hole, and the second through hole is for a portion of the structure of the second fastener to pass through.

10. The battery device as claimed in claim 4, characterized in that, The first reinforcing wall, the second reinforcing wall, and the third connecting part are integrally formed.

11. The battery device as claimed in claim 2, characterized in that, The housing includes a support member and a frame connected to the support member. The support member is used to support the battery cell. The support member and the frame form the receiving space. The limiting beam is disposed within the receiving space. A portion of the connecting bracket is connected to the frame.

12. The battery device as claimed in claim 11, characterized in that, The inner cavity has an opening facing the support member, and a portion of the connecting bracket is received within the inner cavity through the opening.

13. The battery device as claimed in claim 1, characterized in that, The housing includes a support member and a frame connected to the support member. The support member supports the battery cell. The support member and the frame form an accommodating space. The limiting beam is disposed within the accommodating space. The support member has an accommodating cavity and a mounting hole. The mounting hole connects the accommodating cavity and the accommodating space. A portion of the connecting bracket passes through the mounting hole and is fitted and connected to the bottom wall of the limiting beam. A portion of the connecting bracket is disposed within the accommodating cavity and connected to the support member.

14. The battery device as claimed in claim 13, characterized in that, The connecting bracket is connected to the limiting beam by a third fastener, which passes through the limiting beam and the connecting bracket along the third direction of the limiting beam.

15. The battery device as claimed in claim 14, characterized in that, The third fastener includes a first part and a second part that are threaded together. The second part is connected to the side of the connecting bracket opposite to the limiting beam. The first part is threadedly connected to the second part along the third direction, penetrating the limiting beam and the connecting bracket.

16. The battery device according to any one of claims 1-15, characterized in that, The connecting bracket is a one-piece molded structure.

17. The battery device according to any one of claims 1-15, characterized in that, At least a portion of the connecting bracket is welded to the housing.

18. An electrical appliance, characterized in that, Includes the battery device according to any one of claims 1-17.

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