Battery device and electric device

Abstract

The embodiment of the utility model provides a battery device and a power utilization device. The battery device includes a battery cell assembly and a first case. The first box body comprises a bottom wall and a first side wall, the bottom wall bears the battery monomer assembly, the first side wall is arranged on one side of the battery monomer assembly in the first direction, and the first side wall is connected with the bottom wall; wherein the first side wall comprises a first frame and a first panel, the first frame is arranged along the edge of the first panel, the first frame and the first panel are respectively and integrally extruded and formed, and the first frame is welded with the first panel. According to the technical scheme provided by the invention, the reliability of the battery device can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of battery devices, and in particular to a battery device and an electrical device. Background Art

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry. Electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of the sustainable development of the automotive industry. For electric vehicles, battery technology is a key factor in their development.

[0003] During the manufacturing process of battery devices, the reliability of the battery device is an issue that cannot be ignored. Therefore, how to improve the reliability of the battery device is a technical problem that needs to be solved urgently in battery technology. Utility Model Content

[0004] The present application provides a battery device and an electrical device, which can improve the reliability of the battery device.

[0005] This application is achieved through the following technical solutions:

[0006] In a first aspect, embodiments of the present application provide a battery device comprising a battery cell assembly and a first housing. The first housing comprises a bottom wall and a first side wall, wherein the bottom wall supports the battery cell assembly, the first side wall is disposed on one side of the battery cell assembly along a first direction, and the first side wall is connected to the bottom wall; wherein the first side wall comprises a first frame and a first panel, wherein the first frame is disposed along an edge of the first panel, the first frame and the first panel are integrally extruded, and the first frame and the first panel are welded.

[0007] According to the battery device of the embodiment of the present application, the first side wall of the first box body includes a first frame and a first panel, and the first frame and the first panel are respectively extruded as one piece. The first frame and the first panel both have the advantage of a dense structure. The first frame and the first panel are welded, so that the first side wall has a higher airtightness, which is convenient for improving the sealing performance of the accommodating cavity formed by the first box body and other components, and is convenient for improving the reliability of the battery device.

[0008] According to some embodiments of the present application, along the first direction, a size of the first frame is larger than a size of the first panel.

[0009] In the above scheme, the size of the first frame along the first direction is larger than the size of the first panel along the first direction, and the first frame has a higher overall strength, so that the first side wall can be connected to other components; for example, threaded holes can be set on the first frame, and other components are connected to the threaded holes set on the first frame to improve assembly efficiency.

[0010] According to some embodiments of the present application, the first panel has a first surface facing away from the battery cell assembly, and the first frame protrudes from the first surface.

[0011] In the above scheme, the first frame protrudes from the first surface, and the area enclosed between the first frame and the first surface can be used to set components (such as explosion-proof valves, water-cooled connectors, high and low voltage connectors, etc.), so as to reduce the space occupied by the components in the first direction.

[0012] According to some embodiments of the present application, the battery device also includes a second box body, which is snap-fitted with the first box body, and the second box body and the first box body together form a accommodating cavity for accommodating the battery cell assembly; the second box body is formed with a first opening at one end in the first direction, the first side wall closes the first opening, and the second box body is connected to the first frame.

[0013] In the above solution, the first side wall closes the first opening, and the second box body is connected to the first frame, which can increase the space of the accommodating cavity in the third direction, improve the space utilization of the battery device in the third direction, and improve the volume energy density of the battery device.

[0014] According to some embodiments of the present application, the second box body is provided with a first through hole, the first frame is provided with a first threaded hole corresponding to the first through hole, and the battery device further includes a first fastener, which passes through the first through hole and is connected to the first threaded hole.

[0015] In the above scheme, the setting of the first through hole facilitates the insertion of the first fastener, thereby improving assembly efficiency; the setting of the first threaded hole facilitates the assembly of the first fastener with the first frame, and the second box body and the first side wall have a higher connection stability, which is beneficial to the assembly and disassembly of the second box body and the first side wall, and facilitates the maintenance and replacement of the battery cell assembly.

[0016] According to some embodiments of the present application, the battery device further includes a first seal, which is disposed between the second box and the first frame.

[0017] In the above solution, the first seal is arranged between the second box and the first frame, so that the second box and the first frame are sealed together, achieving sealing between the second box and the first side wall, improving the sealing of the battery device, and further improving the reliability of the battery device.

[0018] According to some embodiments of the present application, the first panel has two first edges relatively arranged in the second direction, and the first panel has a second edge away from the bottom wall in the third direction. The second direction, the third direction and the first direction are perpendicular to each other, and the third direction is parallel to the thickness direction of the bottom wall; the first frame includes a first section, a second section and a transition section, the first section is welded to the first edge, the second section is welded to the second edge, and the transition section connects the first section and the second section.

[0019] In the above scheme, the first section is welded to the first edge, the second section is welded to the second edge, and the transition section connects the first section and the second section, so that the first frame and the first panel have connection positions in the first direction and the third direction, which facilitates improving the connection stability and airtightness of the first frame and the first panel.

[0020] According to some embodiments of the present application, there are two first frames, and the two first frames are welded to the two first edges respectively.

[0021] In the above solution, the number of the first frames is two, and the two first frames are welded to the two first edges respectively, which has a simple structure and low processing difficulty.

[0022] According to some embodiments of the present application, the first side wall also includes a second frame, which is arranged at the second edge and extruded integrally with the first panel. The two ends of the second frame in the second direction are respectively welded to the two first frames, and the second box body is connected to the second frame.

[0023] In the above scheme, the second frame and the first panel are extruded as one piece, and the welding area between the first frame and the first panel is small, which is convenient for reducing the risk of deformation of the first panel due to high welding temperature; the second box body is connected to the second frame, and the second box body is connected to the first frame, which is convenient for improving the connection stability between the second box body and the first side wall.

[0024] According to some embodiments of the present application, the second box body is provided with a second through hole, the second frame is provided with a second threaded hole corresponding to the second through hole, and the battery device further includes a second fastener, which passes through the second through hole and is connected to the second threaded hole.

[0025] In the above scheme, the setting of the second through hole facilitates the insertion of the second fastener, thereby improving assembly efficiency; the setting of the second threaded hole facilitates the assembly of the second fastener with the second frame, and the second box body and the first side wall have a higher connection stability, which is beneficial to the assembly and disassembly of the second box body and the first side wall, and facilitates the maintenance and replacement of the battery cell assembly.

[0026] According to some embodiments of the present application, the battery device further includes a first seal, a portion of the first seal is disposed between the second box and the first frame, and another portion of the first seal is disposed between the second box and the second frame.

[0027] In the above solution, a portion of the first seal is arranged between the second box and the first frame, and another portion of the first seal is arranged between the second box and the second frame, so that the second box and the first frame are sealed together, and the second box and the second frame are sealed together, thereby achieving sealing between the second box and the first side wall, improving the sealing of the battery device, and thereby improving the reliability of the battery device.

[0028] According to some embodiments of the present application, the second sections of the two first frames are welded to each other.

[0029] In the above solution, the second sections of the two first frames are welded to each other, the first panel can be a flat plate structure, and the two first frames can be processed in batches, so that the processing difficulty of the first side wall is low and the manufacturing cost is low.

[0030] According to some embodiments of the present application, the first frame includes two first segments and two transition segments, the two first segments are welded to the two first edges respectively, and each first segment is connected to the second segment through a transition segment.

[0031] In the above solution, the first frame is an integrated structure, and the first panel is a flat plate structure, which has a simple structure and is easy to process and manufacture.

[0032] According to some embodiments of the present application, the first frame includes a frame body and a flange portion, the flange portion is arranged on the inner circumferential surface of the frame body, the flange portion includes a first part, a second part and a third part, the first part is located in the first section, the second part is located in the second section, the third part is located in the transition section, the third part is welded to the first part, and the third part is welded to the second part.

[0033] In the above solution, the flange portion is protruding from the inner circumference of the frame body, which can improve the strength of the frame body, so that the first frame has a higher overall strength. The third part is welded to the first part, and the third part is welded to the second part. The first frame can be a bent structure, which is less difficult to process. For example, the processing process of the first frame can be: after extrusion molding through the base material, a notch can be opened in the extruded structure, and the extruded structure can be bent to form a first section, a second section, and a transition section. The third part is welded to the first part, and the third part is welded to the second part to complete the manufacturing of the first frame.

[0034] According to some embodiments of the present application, when cutting along a cutting plane perpendicular to the first direction at any position of the first frame, the cross sections obtained are all the same.

[0035] In the above solution, the cross-sections obtained by cutting along a cutting plane perpendicular to the first direction at any position of the first frame are the same. The first frame can be extruded integrally along the first direction, which is convenient to process. The first frame has a dense structure and high overall strength.

[0036] According to some embodiments of the present application, the second box body includes a top wall and a second side wall, the top wall and the bottom wall are arranged opposite to each other along a third direction, the second side wall is arranged on one side of the battery cell assembly in the second direction, and the second side wall is connected to the top wall; the bottom wall has a first side surface in the second direction, and an end of the second side wall away from the top wall is connected to the first side surface.

[0037] In the above solution, the connection between the second box body and the first box body is achieved by connecting the end of the second side wall away from the top wall to the first side surface, thereby improving the space utilization of the battery device in the third direction to accommodate more battery cell assemblies or reduce the volume of the battery device, thereby improving the volume energy density of the battery device.

[0038] According to some embodiments of the present application, the second side wall is provided with a third through hole, the first side is provided with a third threaded hole corresponding to the third through hole, and the battery device also includes a third fastener, which passes through the third through hole and is connected to the third threaded hole.

[0039] In the above scheme, the setting of the third through hole facilitates the insertion of the third fastener, thereby improving the assembly efficiency; the setting of the third threaded hole facilitates the assembly of the third fastener with the first side surface, and the second side wall and the bottom wall have a higher connection stability, which is beneficial to the assembly and disassembly of the second box body and the bottom wall, and facilitates the maintenance and replacement of the battery cell assembly.

[0040] According to some embodiments of the present application, the battery device further includes a second sealing member disposed between the second side wall and the first side surface.

[0041] In the above solution, the second sealing member is arranged between the second side wall and the first side surface, so that the second side wall and the first side surface are sealed together to achieve sealing between the second box body and the bottom wall, thereby improving the sealing of the battery device and further improving the reliability of the battery device.

[0042] According to some embodiments of the present application, there are two first side walls, the two first side walls are arranged opposite to each other along a first direction, and the battery cell assembly is arranged between the two first side walls.

[0043] In the above solution, the two first side walls are arranged opposite to each other along the first direction, so as to improve the sealing performance of the accommodating cavity formed by the first box body and other components, and to improve the reliability of the battery device.

[0044] In a second aspect, an embodiment of the present application further provides an electrical device, which includes a battery device provided according to any embodiment of the first aspect, and the battery device is used to provide electrical energy.

[0045] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0047] Figure 1 A schematic structural diagram of a vehicle provided in some embodiments of the present application;

[0048] Figure 2 A schematic diagram of the structural decomposition of a battery device provided in some embodiments of the present application;

[0049] Figure 3 A schematic structural diagram of a first side wall provided in some embodiments of the present application;

[0050] Figure 4 for Figure 3 A schematic diagram of the structural decomposition of the first side wall shown;

[0051] Figure 5 A schematic structural diagram of a second box provided in some embodiments of the present application;

[0052] Figure 6 A schematic structural diagram of a first side wall provided in some other embodiments of the present application;

[0053] Figure 7 for Figure 6 A schematic diagram of the structural decomposition of the first side wall shown;

[0054] Figure 8 A schematic structural diagram of a first side wall provided in some further embodiments of the present application;

[0055] Figure 9 for Figure 8 A schematic diagram of the structural decomposition of the first side wall shown;

[0056] Figure 10 A schematic diagram of the assembly of the second box and the second frame provided in some embodiments of the present application;

[0057] Figure 11 A schematic structural diagram of a first side wall provided in some further embodiments of the present application;

[0058] Figure 12 for Figure 11 A schematic diagram of the structural decomposition of the first side wall shown;

[0059] Figure 13 is a structural diagram of the first frame shown;

[0060] Figure 14 for Figure 13 Cross-sectional view in the AA direction.

[0061] Icons: 100-battery device; 10-housing; 11-first housing; 111-bottom wall; 111a-first side; 111b-third threaded hole; 112-first side wall; 113-first frame; 113a-first section; 113b-second section; 113c-transition section; 1131-first threaded hole; 1132-frame body; 1132a-first inner surface; 1132b-first outer surface; 1133-flange; 1133a-first part; 1133b-second part; 1133c-third part; 114-first panel; 114a-first edge; 11 4b-second edge; 114c-third edge; 1141-first surface; 115-second frame; 1151-second threaded hole; 12-second box body; 120-first opening; 121-top wall; 122-second side wall; 1221-third through hole; 123-first through hole; 124-second through hole; 20-battery cell assembly; 31-first fastener; 32-second fastener; 33-third fastener; 41-first seal; 42-second seal; 200-controller; 300-motor; 1000-vehicle; X-first direction; Y-second direction; Z-third direction. DETAILED DESCRIPTION

[0062] The following detailed description of the embodiments of the present application is provided in conjunction with the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of the present application, but are not intended to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0063] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0064] The terms "first", "second" and the like in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

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

[0066] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0067] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0068] The term "multiple" in this application refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0069] The battery device mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include multiple battery cells, which are connected in series, parallel, or hybrid via a busbar.

[0070] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells. For example, the battery cell assembly may be a battery module, which is formed by arranging and securing multiple battery cells to form a single module. For example, a battery module may be formed by bundling multiple battery cells using cable ties.

[0071] In some embodiments, the battery device may be a battery pack, which includes a case and one or more battery cell assemblies, wherein the battery cell assemblies are housed in the case.

[0072] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box by fixing the battery module in the box.

[0073] As an example, the battery cell assembly may also be housed in the box by directly fixing the plurality of battery cells to the box.

[0074] As an example, the housing may include a first housing and a second housing. The first housing and the second housing engage to form an enclosed space within the housing to house the battery cell assembly. Enclosed here means covered or closed, and can be either sealed or unsealed. The first housing may be a top cover or a bottom plate.

[0075] As an example, the box may include a top cover, a frame, and a bottom plate, wherein the top cover and the bottom plate are respectively connected to the frame to form a closed space inside the box to accommodate the battery cell assembly.

[0076] As an example, the box body can be used as a part of the chassis structure of the vehicle. For example, the top cover of the box body can become at least a part of the floor of the vehicle, or the frame of the box body can become at least a part of the crossbeam and longitudinal beam of the vehicle.

[0077] In some embodiments, the battery device refers to an energy storage device, which includes a box with a door on at least one side. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0078] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0079] The battery cells may be, but are not limited to, lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, and the like.

[0080] A battery cell typically includes an electrode assembly. This assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of a battery cell, active ions (such as lithium ions) are inserted and removed between the positive and negative electrodes. The separator, placed between the positive and negative electrodes, prevents short circuits between the positive and negative electrodes while allowing the active ions to pass through.

[0081] In some embodiments, the positive electrode may be a positive electrode sheet, which may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0082] As an example, the positive electrode current collector has two surfaces facing each other in its thickness direction, and the positive electrode active material is provided on either or both of the two facing surfaces of the positive electrode current collector.

[0083] As an example, the positive electrode current collector may be a metal foil or a composite current collector. For example, as the metal foil, stainless steel, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium with a silver-plated surface may be used. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector may be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0084] As an example, the positive electrode active material may include at least one of the following materials: lithium-containing phosphates, lithium transition metal oxides, and their respective modified compounds. However, the present application is not limited to these materials, and other conventional materials that can be used as positive electrode active materials for batteries may also be used.

[0085] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0086] As an example, the negative electrode current collector may be a metal foil or a composite current collector. For example, the metal foil may be silver-plated aluminum, silver-plated stainless steel, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel, or titanium.

[0087] In some embodiments, the negative electrode current collector has two opposite surfaces in its thickness direction, and the negative electrode active material is disposed on either or both of the two opposite surfaces of the negative electrode current collector.

[0088] As an example, the negative electrode active material may be a negative electrode active material for a battery that is well known in the art. As an example, the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, lithium titanate, etc. The silicon-based material may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. The tin-based material may be selected from at least one of elemental tin, tin oxide compounds, and tin alloys. However, the present application is not limited to these materials, and other traditional materials that can be used as negative electrode active materials for batteries may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0089] In some embodiments, the separator is a separator. The present application has no particular limitation on the type of separator, and any known separator with a porous structure having good chemical and mechanical stability can be selected.

[0090] As an example, the primary material of the separator can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramic. The separator can be a single-layer film or a multi-layer composite film, without particular limitation. When the separator is a multi-layer composite film, the materials of each layer can be the same or different, without particular limitation. The separator can be a separate component positioned between the positive and negative electrodes, or it can be attached to the surfaces of the positive and negative electrodes.

[0091] In some embodiments, the separator is a solid electrolyte, which is disposed between the positive electrode and the negative electrode and serves to transport ions and isolate the positive and negative electrodes.

[0092] In some embodiments, the electrode assembly is a wound structure, wherein the positive electrode sheet and the negative electrode sheet are wound into the wound structure.

[0093] In some embodiments, the electrode assembly is a laminate structure.

[0094] In some embodiments, a battery cell may include a housing. The housing is used to encapsulate components such as the electrode assembly and the electrolyte. The housing may be a steel housing, an aluminum housing, a plastic housing (e.g., polypropylene), a composite metal housing (e.g., a copper-aluminum composite housing), or an aluminum-plastic film.

[0095] In some embodiments, the housing includes an end cap and a shell. The shell has an opening, and the end cap closes the opening to form a sealed space for accommodating the electrode assembly, electrolyte, and other substances. The shell may have one or more openings. One or more end caps may also be provided.

[0096] In some embodiments, the housing is provided with at least one electrode terminal, which is electrically connected to a tab of the electrode assembly. The electrode terminal may be directly connected to the tab or indirectly connected to the tab via an adapter. The electrode terminal may be provided on an end cap or on the housing.

[0097] In some embodiments, the housing is provided with an explosion-proof valve for releasing the internal pressure of the battery cell.

[0098] In some embodiments, the housing can be a sealed structure or a non-sealed structure. For example, when the housing is a sealed structure, the housing can protect the electrode assembly and prevent leakage of electrolyte. When the housing is a non-sealed structure, the housing can also protect the electrode assembly. A sealing bag can be included between the housing and the electrode assembly to encapsulate the electrode assembly and electrolyte. Specifically, the sealing bag can be a bag-shaped insulating member or an aluminum-plastic film.

[0099] As an example, the battery cells may be cylindrical, prismatic, soft-pack or other shaped battery cells. Prismatic battery cells include square-shell, blade-shaped, and polygonal batteries. Polygonal batteries may be, for example, hexagonal batteries.

[0100] The development of battery technology must consider multiple design factors simultaneously, such as performance parameters such as energy density, discharge capacity, charge and discharge rate, and the reliability of the battery device must also be considered.

[0101] In some embodiments, a battery device includes a housing and a battery cell assembly disposed within the housing. The housing includes a bottom wall and side walls. The bottom wall is used to support the battery cell assembly, and the side walls are disposed on one side of the battery cell assembly. The housing has high sealing requirements, and therefore, the housing needs to have high sealing performance. However, the side walls are typically cast, and due to the casting process, the side walls may have casting pores. For housings with high sealing requirements, casting pores can reduce the sealing performance of the housing, and in severe cases, cause the housing to fail to seal properly, resulting in low reliability of the battery device.

[0102] In view of this, in order to solve the problem of low reliability of the battery device due to the porosity defects of the cast side wall, an embodiment of the present application provides a battery device, which includes a battery cell assembly and a first box. The first box includes a bottom wall and a first side wall, the bottom wall supports the battery cell assembly, the first side wall is arranged on one side of the battery cell assembly along the first direction, and the first side wall is connected to the bottom wall; wherein, the first side wall includes a first frame and a first panel, the first frame is arranged along the edge of the first panel, the first frame and the first panel are respectively extruded as a whole, and the first frame is welded to the first panel. The first side wall has high airtightness, which can improve the sealing performance of the battery device, so that the battery device has high reliability.

[0103] In such a battery device, the first side wall of the first box body includes a first frame and a first panel, and the first frame and the first panel are extruded integrally. The first frame and the first panel both have the advantage of a dense structure. The first frame and the first panel are welded, so that the first side wall has a higher airtightness, which is convenient for improving the sealing performance of the accommodating cavity formed by the first box body and other components, and is convenient for improving the reliability of the battery device.

[0104] The battery device disclosed in the embodiments of the present application can be used, but is not limited to, in electrical devices such as vehicles, ships, or aircraft. The battery device disclosed in the present application can be used to form a power supply system for the electrical device.

[0105] The technical solutions described in the embodiments of the present application are applicable to various electrical devices that use battery devices, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0106] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device according to an embodiment of the present application.

[0107] Please refer to Figure 1 , Figure 1 Schematic diagram of the structure of the vehicle provided for some embodiments of the present application. Vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 is provided inside the vehicle 1000. The battery device 100 can be provided at the bottom, head or tail of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000. For example, the battery device 100 can be used as an operating power source for the vehicle 1000 and for the circuit system of the vehicle 1000, such as for the working power requirements during the startup, navigation and operation of the vehicle 1000.

[0108] The vehicle 1000 may further include a controller 200 and a motor 300 . The controller 200 is used to control the battery device 100 to supply power to the motor 300 , for example, to meet the power requirements of the vehicle 1000 during startup, navigation, and driving.

[0109] In some embodiments of the present application, the battery device 100 can serve not only as an operating power source for the vehicle 1000 , but also as a driving power source for the vehicle 1000 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000 .

[0110] Please refer to Figure 2 , Figure 2 This is a schematic diagram of the structure of a battery device provided in some embodiments of the present application. The battery device 100 includes a housing 10 and a battery cell assembly 20, with the battery cell assembly 20 housed within the housing 10. The housing 10 is used to provide a storage space for the battery cell assembly 20 and can adopt a variety of structures. In some embodiments, the housing 10 can include a first housing 11 and a second housing 12, which cover each other. The first housing 11 and the second housing 12 together define a storage cavity for accommodating the battery cell assembly 20.

[0111] In the battery device 100, the battery cell assembly 20 may include multiple battery cells, which may be connected in series, in parallel, or in a hybrid configuration. A hybrid configuration refers to multiple battery cells connected both in series and in parallel. The battery device 100 may also include other structures, such as a busbar assembly for electrically connecting the multiple battery cells.

[0112] Please refer to Figure 2 , and further reference Figure 3 , Figure 3 This is a schematic structural diagram of the first side wall provided in some embodiments of the present application. Figure 4 for Figure 3 Schematic diagram of the structural decomposition of the first side wall shown. An embodiment of the present application provides a battery device 100, which includes a battery cell assembly 20 and a first box body 11. The first box body 11 includes a bottom wall 111 and a first side wall 112, the bottom wall 111 carries the battery cell assembly 20, the first side wall 112 is arranged on one side of the battery cell assembly 20 along the first direction X, and the first side wall 112 is connected to the bottom wall 111; wherein, the first side wall 112 includes a first frame 113 and a first panel 114, the first frame 113 is arranged along the edge of the first panel 114, the first frame 113 and the first panel 114 are respectively extruded as one piece, and the first frame 113 and the first panel 114 are welded.

[0113] The bottom wall 111 is a component for supporting the battery cell assembly 20. The bottom wall 111 has a certain strength to support the battery cell assembly 20. In some embodiments, the material of the bottom wall 111 can be aluminum, aluminum alloy, steel, stainless steel, etc.

[0114] One end of the first side wall 112 in the thickness direction of the bottom wall 111 is connected to the bottom wall 111, and the first side wall 112 and the bottom wall 111 are sealed. For example, the first side wall 112 can be welded to the bottom wall 111, or the first side wall 112 can be riveted or clamped to the bottom wall 111, and a sealing structure is provided between the first side wall 112 and the bottom wall 111.

[0115] In some embodiments, the first side wall 112 is welded to the bottom wall 111 .

[0116] In the figure, the direction indicated by letter X may be a first direction, which is perpendicular to the thickness direction of the bottom wall 111. The first direction X may be the length direction of the battery device 100, or the width direction of the battery device 100.

[0117] The first sidewall 112 and the battery cell assembly 20 are distributed along the first direction X, such that the first sidewall 112 is located on one side of the battery cell assembly 20 along the first direction X.

[0118] The first frame 113 and the first panel 114 are welded, so that the connection between the first frame 113 and the first panel 114 has high airtightness, and the first side wall 112 has high airtightness.

[0119] In some embodiments, one end of the first panel 114 is welded to the bottom wall 111, the first frame 113 is arranged on the circumference of the first panel 114 except the connection edge with the bottom wall 111, and the first frame 113 is welded to the bottom wall 111 so that the first side wall 112 is firmly connected and sealed to the bottom wall 111.

[0120] Due to the irregular structure of the first side wall 112 , the first side wall 112 cannot be extruded as a whole, so the first side wall 112 is divided into at least a first frame 113 and a first panel 114 , and the first frame 113 and the first panel 114 are extruded as a whole.

[0121] “The first frame 113 is disposed along the edge of the first panel 114 ” means that the inner circumference of the first frame 113 wraps around at least a portion of the edge of the first panel 114 .

[0122] The first panel 114 is used to place components such as explosion-proof valves, water-cooling connectors, high and low voltage connectors, etc., to facilitate normal charging and discharging operations of the battery device 100 .

[0123] The first frame 113 is used to connect with other components (such as the second box body 12 ), so that the first box body 11 and other components form a receiving cavity for receiving the battery cell assembly 20 .

[0124] “The first frame 113 is welded to the first panel 114 ” means that the inner circumference of the first frame 113 is welded to the edge of the first panel 114 .

[0125] The material of the first side wall 112 mentioned in the embodiment of the present application can be aluminum alloy or other materials suitable for extrusion molding and having high strength. Optionally, the material of the first side wall 112 is aluminum alloy.

[0126] According to the battery device 100 of the embodiment of the present application, the first side wall 112 of the first box body 11 includes a first frame 113 and a first panel 114. The first frame 113 and the first panel 114 are respectively extruded as one piece. The first frame 113 and the first panel 114 both have the advantage of a dense structure. The first frame 113 and the first panel 114 are welded to each other, so that the first side wall 112 has a high airtightness, which is convenient for improving the sealing performance of the accommodating cavity formed by the first box body 11 and other components, and is convenient for improving the reliability of the battery device 100.

[0127] Please refer to Figure 3 and Figure 4According to some embodiments of the present application, along the first direction X, the size of the first frame 113 is larger than the size of the first panel 114.

[0128] A thickness direction of the first panel 114 may be parallel to the first direction X, and a dimension of the first panel 114 along the first direction X may be the thickness of the first panel 114 .

[0129] In the above scheme, the size of the first frame 113 along the first direction X is larger than the size of the first panel 114 along the first direction X, and the first frame 113 has a higher overall strength, so that the first side wall 112 can be connected to other components; for example, a threaded hole can be set in the first frame 113, and other components are connected to the threaded hole set in the first frame 113 to improve assembly efficiency.

[0130] Please refer to Figure 3 According to some embodiments of the present application, the first panel 114 has a first surface 1141 facing away from the battery cell assembly 20 , and the first frame 113 protrudes from the first surface 1141 .

[0131] The first surface 1141 may be a surface of the first panel 114 away from the battery cell assembly 20 in the first direction X.

[0132] After the first frame 113 and the first panel 114 are assembled, a portion of the first frame 113 is located on a side of the first panel 114 facing away from the battery cell assembly 20 .

[0133] In the above scheme, the first frame 113 protrudes from the first surface 1141, and the area enclosed between the first frame 113 and the first surface 1141 can be used to set components (such as explosion-proof valves, water-cooling connectors, high and low voltage connectors, etc.), so as to reduce the space occupied by the components in the first direction X.

[0134] In some embodiments, the first panel 114 also has a second surface facing the battery cell assembly 20. The first surface 1141 and the second surface are arranged opposite to each other along the first direction X. The first frame 113 can protrude from the second surface so that an accommodating space is formed between the first frame 113 and the second surface, which is convenient for accommodating components and reducing the space occupied by components in the first direction X.

[0135] In some embodiments, the first panel 114 has a first surface 1141 facing away from the battery cell assembly 20 and a second surface facing the battery cell assembly 20. The first surface 1141 and the second surface are arranged opposite to each other along the first direction X. The first frame 113 can protrude from the first surface 1141 and the second surface, and an accommodating space can be formed on both sides of the first panel 114 along the first direction X, so as to facilitate the accommodation of components (such as explosion-proof valves, water-cooled connectors, high and low voltage connectors, etc.) arranged on the first panel 114, thereby reducing the space occupied by the components in the first direction X.

[0136] Please refer to Figure 2 , and further reference Figure 5 , Figure 5 Schematic diagram of the structure of a second housing provided in some embodiments of the present application. According to some embodiments of the present application, the battery device 100 further includes a second housing 12, which engages with the first housing 11 and together forms a housing for accommodating the battery cell assembly 20. The second housing 12 has a first opening 120 formed at one end thereof in the first direction X, and a first sidewall 112 encloses the first opening 120. The second housing 12 is connected to the first frame 113.

[0137] The second box body 12 is used to cooperate with the first box body 11 to enclose a receiving cavity for receiving the battery cell assembly 20 , and the battery cell assembly 20 is received in the receiving cavity.

[0138] In some embodiments, the first case 11 may be considered as the lower case 10 of the battery device 100 , and the second case 12 may be considered as the upper case 10 of the battery device 100 .

[0139] In some embodiments, the second housing 12 may include a top wall 121 and two second side walls 122. The top wall 121 and the bottom wall 111 are arranged opposite each other along a third direction Z. The two second side walls 122 are arranged opposite each other along a second direction Y. The top wall 121 is disposed between the two second side walls 122. One end of the second side wall 122 is connected to the top wall 121, and the other end of the second side wall 122 is connected to the bottom wall 111. The third direction Z is parallel to the thickness direction of the bottom wall 111. The third direction Z, the second direction Y, and the first direction X are perpendicular to each other. The third direction Z may be the height direction of the battery device 100.

[0140] One end of the top wall 121 in the first direction X and one end of the second side wall 122 in the first direction X may surround a first opening 120 .

[0141] The first opening 120 formed at one end of the second housing 12 along the first direction X can be a notch-shaped structure corresponding to the first side wall 112, so that the first side wall 112 can close the first opening 120, thereby reducing the occurrence of additional mutual interference or overlapping parts of the battery device 100, thereby improving the utilization rate of the manufacturing materials of the battery device 100 and reducing the manufacturing cost of the battery device 100.

[0142] In some embodiments, the cross-section of the second box body 12 may be U-shaped, and the cross-section of the second box body 12 may be a cross-section obtained by cutting along a cutting plane perpendicular to the first direction X.

[0143] In the above solution, the first side wall 112 closes the first opening 120, and the second box body 12 is connected to the first frame 113, which can increase the space of the accommodating cavity in the third direction Z, improve the space utilization of the battery device 100 in the third direction Z, and improve the volume energy density of the battery device 100.

[0144] Please refer to Figures 2 to 5 According to some embodiments of the present application, the second box body 12 is provided with a first through hole 123, the first frame 113 is provided with a first threaded hole 1131 corresponding to the first through hole 123, and the battery device 100 also includes a first fastener 31, which passes through the first through hole 123 and is connected to the first threaded hole 1131.

[0145] The first through hole 123 is a hole that penetrates the wall of the second box body 12 along the thickness direction of the wall.

[0146] The first threaded hole 1131 may be a threaded hole opened in the first side frame 113 , or the first threaded hole 1131 may be a threaded hole of a threaded sleeve embedded in the first side frame 113 .

[0147] The first fastener 31 can be a bolt or a fastener with a threaded section. After one end of the threaded section of the first fastener 31 passes through the first through hole 123, it is threadedly engaged with the first threaded hole 1131 to connect the second box body 12 to the first side wall 112, so as to improve the connection stability between the second box body 12 and the first side wall 112.

[0148] In some embodiments, there are multiple first through holes 123, and the multiple first through holes 123 are distributed at circumferential intervals along the first opening 120; there are multiple first threaded holes 1131, and each first through hole 123 corresponds to a first threaded hole 1131; there are multiple first fasteners 31, and each first fastener 31 corresponds to a first through hole 123.

[0149] In the above scheme, the setting of the first through hole 123 facilitates the insertion of the first fastener 31, thereby improving assembly efficiency; the setting of the first threaded hole 1131 facilitates the assembly of the first fastener 31 with the first frame 113, and the second box body 12 and the first side wall 112 have a higher connection stability, which is beneficial to the assembly and disassembly of the second box body 12 and the first side wall 112, and facilitates the maintenance and replacement of the battery cell assembly 20.

[0150] Please refer to Figure 2 According to some embodiments of the present application, the battery device 100 further includes a first sealing member 41 , which is disposed between the second box body 12 and the first frame 113 .

[0151] The first sealing member 41 may be a sealing gasket or a sealant, which has a good sealing effect.

[0152] The first sealing member 41 is arranged between the inner surface of the second box body 12 and the outer peripheral surface of the first frame 113, wherein the inner surface of the second box body 12 refers to the surface of the second box body 12 facing the first box body 11, and the outer peripheral surface of the first frame 113 refers to the surface of the first frame 113 facing away from the first panel 114.

[0153] In the above solution, the first sealing member 41 is disposed between the second box body 12 and the first frame 113 , so that the second box body 12 and the first frame 113 are sealed together, thereby achieving a seal between the second box body 12 and the first side wall 112 , improving the sealing performance of the battery device 100 and further improving the reliability of the battery device 100 .

[0154] Please refer to Figure 3 and Figure 4 According to some embodiments of the present application, the first panel 114 has two first edges 114a arranged opposite to each other in the second direction Y, and the first panel 114 has a first edge 114a away from the bottom wall 111 in the third direction Z (see Figure 2 ), the second direction Y, the third direction Z and the first direction X are perpendicular to each other, and the third direction Z is parallel to the thickness direction of the bottom wall 111; the first frame 113 includes a first section 113a, a second section 113b and a transition section 113c, the first section 113a is welded to the first edge 114a, the second section 113b is welded to the second edge 114b, and the transition section 113c connects the first section 113a and the second section 113b.

[0155] The two first edges 114 a are located at opposite ends of the first panel 114 in the second direction Y, and the second edge 114 b is located at an end of the first panel 114 in the third direction Z away from the bottom wall 111 .

[0156] The first panel 114 further includes two third edges 114 c , the third edges 114 c connecting the first edge 114 a and the second edge 114 b , and the transition section 113 c is welded to the third edges 114 c .

[0157] In some embodiments, the two first edges 114 a are parallel to each other, and the first edge 114 a is straight; the second edge 114 b is straight, and the first panel 114 may be a rectangular flat plate structure.

[0158] In some embodiments, the length of the second segment 113b in the second direction Y may be the same as the length of the second edge 114b in the second direction Y, and the second segment 113b is welded to the entire second edge 114b. In other embodiments, the length of the second segment 113b in the second direction Y may be less than the length of the second edge 114b in the second direction Y, and the second segment 113b is welded to a portion of the second edge 114b.

[0159] In the above scheme, the first section 113a is welded to the first edge 114a, the second section 113b is welded to the second edge 114b, and the transition section 113c connects the first section 113a and the second section 113b, so that the first frame 113 and the first panel 114 have connection positions in the first direction X and the third direction Z, which facilitates improving the connection stability and airtightness of the first frame 113 and the first panel 114.

[0160] Please refer to Figures 6 to 9 , Figure 6 This is a schematic structural diagram of the first side wall provided in some other embodiments of the present application. Figure 7 for Figure 6 The structural decomposition diagram of the first side wall is shown in FIG. Figure 8 This is a schematic structural diagram of the first side wall provided in some embodiments of the present application. Figure 9 for Figure 8 According to some embodiments of the present application, there are two first frames 113 , and the two first frames 113 are welded to the two first edges 114 a respectively.

[0161] The second sections 113 b of the two first frames 113 are arranged opposite to each other. The second sections 113 b of the two first frames 113 can be directly welded, or the second sections 113 b of the two first frames 113 can be welded through an intermediate component.

[0162] In some embodiments, the structures of the two first frames 113 can be the same to facilitate processing and manufacturing.

[0163] In the above solution, there are two first frames 113 , and the two first frames 113 are welded to the two first edges 114 a respectively, which has a simple structure and low processing difficulty.

[0164] Please refer to Figure 6 and Figure 7 According to some embodiments of the present application, the first side wall 112 further includes a second frame 115, which is arranged at the second edge 114b and is integrally extruded with the first panel 114. The two ends of the second frame 115 in the second direction Y are respectively welded to the two first frames 113. The second box body 12 (please refer to Figure 2 ) is connected to the second frame 115.

[0165] Along the second direction Y, the second frame 115 is located between the two first frames 113 , the second section 113 b of the first frame 113 is disposed toward the second frame 115 , and the second section 113 b and the second frame 115 together cover the second edge 114 b of the first panel 114 .

[0166] In some embodiments, a surface of the second frame 115 facing the bottom wall 111 is connected to the second edge 114 b .

[0167] In the above scheme, the second frame 115 and the first panel 114 are extruded as one piece, and the welding area between the first frame 113 and the first panel 114 is small, which is convenient for reducing the risk of deformation of the first panel 114 due to high welding temperature; the second box body 12 is connected to the second frame 115, and the second box body 12 is connected to the first frame 113, which is convenient for improving the connection stability between the second box body 12 and the first side wall 112.

[0168] In the above solution, the structure formed by the second frame 115 and the first panel 114 can be integrally extruded from a base material along the second direction Y, and connecting edges for mating with the second section 113b of the first frame 113 (the two ends of the second edge 114b in the second direction Y) are cut at both ends of the extruded structure along the second direction Y. The second section 113b of the first frame 113 is welded to the connecting edges. The first frame 113 can be integrally extruded from a base material along the first direction X.

[0169] Please refer to Figure 10 , Figure 10 Schematic diagram of the assembly of the second housing and the second frame provided in some embodiments of the present application. According to some embodiments of the present application, the second housing 12 is provided with a second through hole 124, the second frame 115 is provided with a second threaded hole 1151 corresponding to the second through hole 124, and the battery device 100 further includes a second fastener 32, which passes through the second through hole 124 and is connected to the second threaded hole 1151.

[0170] The second through hole 124 is a hole that passes through the second box body 12 along the third direction Z.

[0171] The second threaded hole 1151 may be a threaded hole opened in the second frame 115 , or the second threaded hole 1151 may be a threaded hole of a threaded sleeve embedded in the second frame 115 .

[0172] The second fastener 32 can be a bolt or a fastener with a threaded section. After one end of the second fastener 32 with the threaded section passes through the second through hole 124, it is threadedly engaged with the second threaded hole 1151 to connect the second box body 12 to the first side wall 112, so as to improve the connection stability between the second box body 12 and the first side wall 112.

[0173] In some embodiments, there are multiple second through holes 124, and the multiple second through holes 124 are arranged at circumferential intervals along the first opening 120; there are multiple second threaded holes 1151, and each second threaded hole 1151 corresponds to a second through hole 124; there are multiple second fasteners 32, and each second fastener 32 corresponds to a second through hole 124.

[0174] In the above scheme, the setting of the second through hole 124 facilitates the insertion of the second fastener 32, thereby improving assembly efficiency; the setting of the second threaded hole 1151 facilitates the assembly of the second fastener 32 with the second frame 115, and the second box body 12 and the first side wall 112 have a higher connection stability, which is beneficial to the assembly and disassembly of the second box body 12 and the first side wall 112, and facilitates the maintenance and replacement of the battery cell assembly 20.

[0175] Please refer to Figure 10 According to some embodiments of the present application, the battery device 100 further includes a first seal 41 , a portion of the first seal 41 is disposed between the second box body 12 and the first frame 113 , and another portion of the first seal 41 is disposed between the second box body 12 and the second frame 115 .

[0176] A portion of the first seal 41 is disposed between the inner surface of the second box body 12 and the outer peripheral surface of the first frame 113 , and another portion of the first seal 41 is disposed between the inner surface of the second box body 12 and the surface of the second frame 115 facing away from the bottom wall 111 .

[0177] In the above solution, a portion of the first seal 41 is arranged between the second box body 12 and the first frame 113, and another portion of the first seal 41 is arranged between the second box body 12 and the second frame 115, so that the second box body 12 and the first frame 113 are sealed together, and the second box body 12 and the second frame 115 are sealed together, thereby achieving sealing between the second box body 12 and the first side wall 112, improving the sealing of the battery device 100, and thereby improving the reliability of the battery device 100.

[0178] Please refer to Figure 8 and Figure 9According to some embodiments of the present application, the second sections 113b of the two first frames 113 are welded to each other.

[0179] The first frame 113 may be extruded along a first direction X, and the first panel 114 may be a flat plate structure extruded along a second direction Y.

[0180] The first panel 114 may be a rectangular flat plate, and the first frame 113 may be L-shaped.

[0181] In the above solution, the second sections 113b of the two first frames 113 are welded to each other, the first panel 114 can be a flat plate structure, and the two first frames 113 can be processed in batches, so that the first side wall 112 is less difficult to process and has a lower manufacturing cost.

[0182] Please refer to Figure 3 and Figure 4 , and further reference Figure 11 and Figure 12 , Figure 11 This is a schematic structural diagram of the first side wall provided in some further embodiments of the present application. Figure 12 for Figure 11 According to some embodiments of the present application, the first frame 113 includes two first sections 113a and two transition sections 113c. The two first sections 113a are welded to the two first edges 114a respectively, and each first section 113a is connected to the second section 113b via a transition section 113c.

[0183] The two transition sections 113c are located at both ends of the second section 113b along the second direction Y. The two transition sections 113c correspond one-to-one to the two first sections 113a. Each first section 113a is connected to the second section 113b via a transition section 113c.

[0184] The first frame 113 may be U-shaped, and the first frame 113 surrounds an edge of the first panel 114 except an edge connected to the bottom wall 111 .

[0185] In the above solution, the first frame 113 is an integrated structure, and the first panel 114 is a flat plate structure, which has a simple structure and is easy to process and manufacture.

[0186] Please refer to Figure 11 and Figure 12 , and further reference Figure 13 , Figure 13 for Figure 12A schematic structural diagram of the first frame is shown. According to some embodiments of the present application, the first frame 113 includes a frame body 1132 and a flange portion 1133. The flange portion 1133 is arranged on the inner circumference of the frame body 1132. The flange portion 1133 includes a first portion 1133a, a second portion 1133b, and a third portion 1133c. The first portion 1133a is located in the first section 113a, the second portion 1133b is located in the second section 113b, and the third portion 1133c is located in the transition section 113c. The third portion 1133c is welded to the first portion 1133a, and the third portion 1133c is welded to the second portion 1133b.

[0187] The inner peripheral surface of the frame body 1132 refers to the surface of the frame body 1132 facing the first panel 114 .

[0188] The first portion 1133a corresponds to the first edge 114a, the second portion 1133b corresponds to the second edge 114b, and the third portion 1133c corresponds to the third edge 114c.

[0189] In some embodiments, the size of the frame body 1132 along the first direction X is greater than the size of the flange portion 1133 along the first direction X. The frame body 1132 has a first inner surface 1132a and a first outer surface 1132b arranged opposite to each other along the first direction X. The first inner surface 1132a is arranged facing the battery cell assembly 20, and the first outer surface 1132b is arranged away from the battery cell assembly 20. The flange portion 1133 is located between the first inner surface 1132a and the first outer surface 1132b.

[0190] In some embodiments, the thickness of the frame body 1132 is less than the height of the flange portion 1133 protruding from the frame body 1132, and the thickness direction of the frame body 1132 is parallel to the height direction of the flange portion 1133 protruding from the frame body 1132, so as to facilitate the processing of threaded holes on the first frame 113.

[0191] Please refer to Figure 14 , Figure 14 for Figure 13 In some embodiments, the flange portion 1133 is flush with the first inner surface 1132a, which facilitates processing and manufacturing. In addition, a storage space can be formed on the side of the first panel 114 facing away from the battery cell assembly 20 to accommodate components and reduce the space occupied by the components in the first direction X.

[0192] In the above solution, the flange portion 1133 is protruded from the inner circumference of the frame body 1132, which can improve the strength of the frame body 1132, so that the first frame 113 has a higher overall strength. The third part 1133c is welded to the first part 1133a, and the third part 1133c is welded to the second part 1133b. The first frame 113 can be a bent structure, which is less difficult to process. For example, the processing process of the first frame 113 can be: the base material is extruded into a long strip structure, four notches are spaced apart in the extension direction of the long strip structure, and the long strip structure is bent into a U shape, and the third part 1133c is welded to the first part 1133a, and the third part 1133c is welded to the second part 1133b to form the first frame 113.

[0193] Please refer to Figure 3 and Figure 4 According to some embodiments of the present application, when cutting along a cutting plane perpendicular to the first direction X at any position of the first frame 113, the cross sections obtained are all the same.

[0194] A cross section of the first frame 113 obtained by cutting the first frame 113 along a cutting plane perpendicular to the first direction X may be referred to as a cross section of the first frame 113 .

[0195] The first frame 113 can be formed by integrally extruding the base material along the first direction X, so that any cross section of the first frame 113 is the same.

[0196] In the above solution, the cross-sections obtained by cutting along a cutting plane perpendicular to the first direction X at any position of the first frame 113 are the same. The first frame 113 can be extruded as a whole along the first direction X, which is convenient to process. The first frame 113 has a dense structure and high overall strength.

[0197] Please refer to Figure 2 and Figure 5 According to some embodiments of the present application, the second box body 12 includes a top wall 121 and a second side wall 122. The top wall 121 and the bottom wall 111 are arranged opposite to each other along the third direction Z. The second side wall 122 is arranged on one side of the battery cell assembly 20 in the second direction Y, and the second side wall 122 is connected to the top wall 121; the bottom wall 111 has a first side surface 111a in the second direction Y, and an end of the second side wall 122 away from the top wall 121 is connected to the first side surface 111a.

[0198] There are two first side surfaces 111 a , and the two first side surfaces 111 a are located at two opposite ends of the bottom wall 111 in the second direction Y, respectively.

[0199] There are two second side walls 122 , which are spaced apart along the second direction Y. The top wall 121 is disposed between the two second side walls 122 . One end of the second side wall 122 in the third direction Z is connected to the top wall 121 , and the other end of the second side wall 122 in the third direction Z is connected to the first side surface 111 a . In some embodiments, the second housing 12 is U-shaped.

[0200] In the above solution, the second box body 12 is connected to the first box body 11 by connecting one end of the second side wall 122 away from the top wall 121 to the first side surface 111a, thereby improving the space utilization of the battery device 100 in the third direction Z to accommodate more battery cell assemblies 20 or reduce the volume of the battery device 100, thereby improving the volume energy density of the battery device 100.

[0201] Please refer to Figure 2 and Figure 5 According to some embodiments of the present application, the second side wall 122 is provided with a third through hole 1221, the first side surface 111a is provided with a third threaded hole 111b corresponding to the third through hole 1221, and the battery device 100 also includes a third fastener 33, which passes through the third through hole 1221 and is connected to the third threaded hole 111b.

[0202] The third through hole 1221 is a hole penetrating the second side wall 122 along the second direction Y. The thickness direction of the second side wall 122 is parallel to the second direction Y.

[0203] The third threaded hole 111 b may be a threaded hole opened in the first side surface 111 a , or the third threaded hole 111 b may be a threaded hole of a threaded sleeve embedded in the first side surface 111 a .

[0204] The third fastener 33 can be a bolt or a fastener with a threaded section. After one end of the threaded section of the third fastener 33 passes through the third through hole 1221, it is threadedly engaged with the third threaded hole 111b to connect the second side wall 122 to the first side surface 111a, so as to improve the connection stability between the second box body 12 and the bottom wall 111.

[0205] In some embodiments, there are multiple third through holes 1221, and the multiple third through holes 1221 are arranged at intervals along the first direction X; there are multiple third threaded holes 111b, and each third threaded hole 111b corresponds to a third through hole 1221; there are multiple third fasteners 33, and each third fastener 33 corresponds to a third through hole 1221.

[0206] In the above scheme, the setting of the third through hole 1221 facilitates the insertion of the third fastener 33, thereby improving assembly efficiency; the setting of the third threaded hole 111b facilitates the assembly of the third fastener 33 with the first side surface 111a, and the second side wall 122 and the bottom wall 111 have a high connection stability, which is beneficial to the assembly and disassembly of the second box body 12 and the bottom wall 111, and facilitates the maintenance and replacement of the battery cell assembly 20.

[0207] Please refer to Figure 2 According to some embodiments of the present application, the battery device 100 further includes a second sealing member 42 , which is disposed between the second side wall 122 and the first side surface 111 a .

[0208] The second sealing member 42 may be a sealant or a sealing gasket and is clamped between the inner surface of the second side wall 122 and the first side surface 111 a.

[0209] In the above solution, the second sealing member 42 is disposed between the second side wall 122 and the first side surface 111 a , so that the second side wall 122 and the first side surface 111 a are sealed together, thereby achieving a seal between the second box body 12 and the bottom wall 111 , improving the sealing performance of the battery device 100 , and further improving the reliability of the battery device 100 .

[0210] Please refer to Figure 2 According to some embodiments of the present application, there are two first side walls 112 , the two first side walls 112 are arranged opposite to each other along the first direction X, and the battery cell assembly 20 is arranged between the two first side walls 112 .

[0211] The structures of the two first side walls 112 may be the same or similar. The two first side walls 112 may be processed simultaneously, and then different components may be arranged on the two first side walls 112 according to their respective functional requirements.

[0212] The two first side walls 112 may be disposed at opposite ends of the bottom wall 111 in the first direction X, so as to cooperate with the bottom wall 111 to form a larger accommodating space.

[0213] In the above solution, the two first side walls 112 are arranged opposite to each other along the first direction X, so as to improve the sealing performance of the accommodation cavity formed by the first box body 11 and other components, and to improve the reliability of the battery device 100.

[0214] An embodiment of the present application further provides an electrical device, which includes the battery device 100 provided according to any of the above embodiments, and the battery device 100 is used to provide electrical energy.

[0215] The power-consuming device may be any of the aforementioned devices or systems using the battery device 100 as a power source.

[0216] The above embodiment describes the structure of the battery device 100 provided in the present application. The following describes a method for manufacturing the first sidewall 112 of the battery device 100 provided in the embodiment of the present application.

[0217] Some embodiments of the present application provide a method for manufacturing a first sidewall 112, which includes:

[0218] S110, integrally extruding a substrate to form a first component and a second component, wherein the first component is L-shaped, and there are two first components, which can serve as a first frame 113, and the second component includes a flat plate and a frame, wherein the flat plate is rectangular, and the frame protrudes from one side of the flat plate in the thickness direction;

[0219] S120, processing the second component, cutting off portions at both ends of the frame in the longitudinal direction so that the length of the flat panel is greater than the length of the frame, thereby forming a structure of a first panel 114 and a second frame 115;

[0220] S130, the two first frames 113 are welded to the first panel 114 and the second frame 115 respectively, wherein the first section 113a of the first frame 113 is welded to the first edge 114a of the first panel 114, the second section 113b of the first frame 113 is welded to the second edge 114b of the first panel 114, the transition section 113c of the first frame 113 is welded to the third edge 114c of the first panel 114, and the second section 113b of the first frame 113 is welded to the second frame 115, to obtain the first side wall 112 (please refer to Figure 6 and Figure 7 ).

[0221] Some other embodiments of the present application further provide a method for manufacturing the first sidewall 112, which includes:

[0222] S210 , extruding the substrate into a first component and a second component. The first component is in the shape of an elongated strip and includes a frame body 1132 and a flange portion 1133 . The flange portion 1133 protrudes from one side of the frame body 1132 . The second component is in the shape of a rectangular flat plate and may be the first panel 114 .

[0223] S220: Four notches are spaced apart on the flange portion 1133 along the extension direction of the first component. The first component is bent into a U-shape, so that the first component forms a first section 113a, a second section 113b, and a transition section 113c. The flange portion 1133 includes a first portion 1133a located in the first section 113a, a second portion 1133b located in the second section 113b, and a third portion 1133c located in the transition section 113c. The third portion 1133c is welded to the first portion 1133a, and the third portion 1133c is welded to the second portion 1133b, to form the first frame 113.

[0224] S230, the first frame 113 is welded to the first panel 114, wherein the first portion 1133a is welded to the first edge 114a of the first panel 114, the second portion 1133b is welded to the second edge 114b of the first panel 114, and the third portion 1133c is welded to the third edge 114c of the first panel 114, to obtain the first side wall 112 (see Figures 11 to 13 ).

[0225] Some other embodiments of the present application further provide a method for manufacturing the first sidewall 112, which includes:

[0226] S310 , extruding the substrate into a first component and a second component, wherein the first component is U-shaped and is the first frame 113 , and the second component is a rectangular flat plate and is the first panel 114 ;

[0227] S320, welding the first frame 113 to the first panel 114, wherein the first section 113a of the first frame 113 is welded to the first edge 114a of the first panel 114, the second section 113b of the first frame 113 is welded to the second edge 114b of the first panel 114, and the transition section 113c of the first frame 113 is welded to the third edge 114c of the first panel 114, to obtain the first side wall 112 ( Figure 3 and Figure 4 ).

[0228] According to some embodiments of this application, please refer to Figure 2 The embodiment of the present application provides a battery device 100 , which includes a first box body 11 , a second box body 12 , a battery cell assembly 20 , a first fastener 31 , and a third fastener 33 .

[0229] The second housing 12 is engaged with the first housing 11, and the second housing 12 and the first housing 11 together form a receiving space for receiving the battery cell assembly 20. The battery cell assembly 20 includes a plurality of battery cells, and the battery cell assembly 20 is disposed in the receiving space.

[0230] The first housing 11 includes a bottom wall 111 and two first side walls 112. The bottom wall 111 supports the battery cell assembly 20. The two first side walls 112 are disposed at opposite ends of the bottom wall 111 along the first direction X, and the battery cell assembly 20 is disposed between the two first side walls 112. The bottom wall 111 has first side surfaces 111a at opposite ends in the second direction Y.

[0231] The second housing 12 includes a top wall 121 and two second side walls 122. The top wall 121 and the bottom wall 111 are arranged opposite each other along the third direction Z. The two second side walls 122 are arranged opposite each other along the second direction Y. The top wall 121 is disposed between the two second side walls 122. One end of the second side wall 122 is connected to the top wall 121, and the other end of the second side wall 122 is connected to the bottom wall 111. The cross-section of the second housing 12 is U-shaped. A first opening 120 is formed at one end of the second housing 12 in the first direction X. The first side wall 112 closes the first opening 120. The second housing 12 is provided with a first through hole 123. The first frame 113 is provided with a first threaded hole 1131 corresponding to the first through hole 123. The first fastener 31 passes through the first through hole 123 and is connected to the first threaded hole 1131. The second side wall 122 is provided with a third through hole 1221 , the first side surface 111 a is provided with a third threaded hole 111 b corresponding to the third through hole 1221 , and the third fastener 33 passes through the third through hole 1221 and is connected to the third threaded hole 111 b .

[0232] The first side wall 112 includes a first frame 113 and a first panel 114. The first frame 113 is disposed along the edge of the first panel 114. The first frame 113 and the first panel 114 are extruded integrally and welded to the first frame 113 and the first panel 114. One end of the first panel 114 along the third direction Z is welded to the bottom wall 111. The first panel 114 has two first edges 114a disposed opposite each other in the second direction Y. The first panel 114 has a second edge 114b away from the bottom wall 111 in the third direction Z. The first panel 114 also has a third edge 114c that connects the first edge 114a and the second edge 114b.

[0233] In some embodiments, please refer to Figure 3 and Figure 4 The first frame 113 is extruded integrally to form a U-shaped frame. The first frame 113 includes two first sections 113a, a second section 113b, and two transition sections 113c. The two first sections 113a are spaced apart along the second direction Y, the second section 113b is located between the two first sections 113a, and the transition section 113c connects the first section 113a and the second section 113b. The first section 113a is welded to the first edge 114a, the second section 113b is welded to the second edge 114b, and the transition section 113c is welded to the third edge 114c. In this solution, the cross-section obtained by cutting along a plane perpendicular to the first direction X at any position of the first frame 113 is the same. The first frame 113 can be extruded integrally along the first direction X, which is convenient to process. The first frame 113 has a dense structure and high overall strength.

[0234] In some embodiments, please refer to Figures 11 to 13The first frame 113 is a bent structure. The first frame 113 is U-shaped. The first frame 113 includes two first sections 113a, a second section 113b and two transition sections 113c. The two first sections 113a are spaced apart along the second direction Y. The second section 113b is located between the two first sections 113a. The transition section 113c connects the first section 113a and the second section 113b. The first frame 113 includes a frame body 1132 and a flange portion 1133. The flange portion 1133 is provided on the inner circumference of the frame body 1132. The flange portion 1133 includes a first portion 1133a, a second portion 1133b, and a third portion 1133c. The first portion 1133a is located in the first section 113a, the second portion 1133b is located in the second section 113b, and the third portion 1133c is located in the transition section 113c. The third portion 1133c is welded to the first portion 1133a, and the third portion 1133c is welded to the second portion 1133b. The first portion 1133a is welded to the first edge 114a, the second portion 1133b is welded to the second edge 114b, and the third portion 1133c is welded to the third edge 114c. In this embodiment, the flange portion 1133 protrudes from the inner circumference of the frame body 1132, which can improve the strength of the frame body 1132 and provide the first frame 113 with higher overall strength. The third portion 1133c is welded to the first portion 1133a, and the third portion 1133c is welded to the second portion 1133b. The first frame 113 can be a bent structure, which is less difficult to process. For example, the processing of the first frame 113 may be as follows: the substrate is extruded into a long strip structure, four notches are spaced apart in the extension direction of the long strip structure, the long strip structure is bent into a U shape, and the third part 1133c is welded to the first part 1133a, and the third part 1133c is welded to the second part 1133b to form the first frame 113.

[0235] In some embodiments, please refer to Figure 6 and Figure 7The first side wall 112 also includes a second frame 115, which is connected to the second edge 114b of the first panel 114 and is extruded integrally with the first panel 114. The first frame 113 is L-shaped, and there are two first frames 113, which are spaced apart in the second direction Y. The first frame 113 includes a first section 113a, a second section 113b, and a transition section 113c. The first section 113a is welded to the first edge 114a, the second section 113b is welded to the second edge 114b, the transition section 113c connects the first section 113a and the second section 113b, and the transition section 113c is welded to the third edge 114c. The second frame 115 is welded to the two first frames 113 at both ends in the second direction Y. The second housing 12 is provided with a second through-hole 124, and the second frame 115 is provided with a second threaded hole 1151 corresponding to the second through-hole 124. The battery device 100 also includes a second fastener 32, which passes through the second through-hole 124 and is connected to the second threaded hole 1151. In this embodiment, the second frame 115 and the first panel 114 are integrally extruded, and the welding area between the first frame 113 and the first panel 114 is small, which helps reduce the risk of deformation of the first panel 114 due to the high temperature of welding.

[0236] In the aforementioned battery device 100, two first side walls 112 are located at opposite ends of the bottom wall 111 in the first direction X. The first side walls 112 enclose the first opening 120. The second housing 12 is connected to the first frame 113, thereby increasing the space of the accommodating cavity in the third direction Z. This improves the space utilization of the battery device 100 in the third direction Z and increases the volumetric energy density of the battery device 100. The first frame 113 and the first panel 114 are extruded integrally, each having the advantage of a compact structure. The welding of the first frame 113 and the first panel 114 ensures that the first side walls 112 have a high degree of airtightness, thereby enhancing the sealing performance of the accommodating cavity formed by the first housing 11 and other components, and thus improving the reliability of the battery device 100.

[0237] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and components may be substituted with equivalents without departing from the scope of the present application. In particular, the various technical features described in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A battery device, characterized in that: include: Battery cell assembly; A first box body includes a bottom wall and a first side wall, wherein the bottom wall supports the battery cell assembly, the first side wall is arranged on one side of the battery cell assembly along a first direction, and the first side wall is connected to the bottom wall; The first side wall includes a first frame and a first panel. The first frame is arranged along the edge of the first panel. The first frame and the first panel are extruded integrally, and the first frame is welded to the first panel.

2. The battery device according to claim 1, wherein: Along the first direction, a size of the first frame is larger than a size of the first panel.

3. The battery device according to claim 1, wherein: The first panel has a first surface facing away from the battery cell assembly, and the first frame protrudes from the first surface.

4. The battery device according to claim 1, wherein: The battery device further comprises: a second box body, snapped together with the first box body, the second box body and the first box body together forming a receiving cavity for receiving the battery cell assembly; A first opening is formed at one end of the second box in the first direction, the first side wall closes the first opening, and the second box is connected to the first frame.

5. The battery device according to claim 4, characterized in that The second box body is provided with a first through hole, the first frame is provided with a first threaded hole corresponding to the first through hole, and the battery device further includes a first fastener passing through the first through hole and connected to the first threaded hole.

6. The battery device according to claim 4, characterized in that The battery device further includes a first sealant, which is disposed between the second box and the first frame.

7. The battery device according to claim 4, characterized in that The first panel has two first edges opposite to each other in a second direction, and has a second edge away from the bottom wall in a third direction. The second direction, the third direction, and the first direction are perpendicular to each other, and the third direction is parallel to the thickness direction of the bottom wall. The first frame includes a first section, a second section and a transition section. The first section is welded to the first edge, the second section is welded to the second edge, and the transition section connects the first section and the second section.

8. The battery device according to claim 7, characterized in that The number of the first frames is two, and the two first frames are welded to the two first edges respectively.

9. The battery device according to claim 8, characterized in that The first side wall also includes a second frame, which is arranged at the second edge and extruded integrally with the first panel. The second frame is welded to the two first frames at both ends in the second direction, and the second box is connected to the second frame.

10. The battery device according to claim 9, characterized in that The second box body is provided with a second through hole, the second frame is provided with a second threaded hole corresponding to the second through hole, and the battery device further includes a second fastener passing through the second through hole and connected to the second threaded hole.

11. The battery device according to claim 10, characterized in that The battery device further includes a first seal, a portion of the first seal is disposed between the second box and the first frame, and another portion of the first seal is disposed between the second box and the second frame.

12. The battery device according to claim 8, wherein: The second sections of the two first frames are welded to each other.

13. The battery device according to claim 7, wherein: The first frame includes two first sections and two transition sections. The two first sections are welded to the two first edges respectively, and each first section is connected to the second section via one transition section.

14. The battery device according to claim 13, wherein: The first frame includes a frame body and a flange portion, the flange portion is arranged on the inner circumference of the frame body, the flange portion includes a first part, a second part and a third part, the first part is located in the first section, the second part is located in the second section, the third part is located in the transition section, the third part is welded to the first part, and the third part is welded to the second part.

15. The battery device according to claim 13, wherein: The cross sections obtained by cutting along a cutting plane perpendicular to the first direction at any position of the first frame are all the same.

16. The battery device according to claim 4, characterized in that The second box body includes a top wall and a second side wall, the top wall and the bottom wall are arranged opposite to each other along the third direction, the second side wall is arranged on one side of the battery monomer assembly in the second direction, and the second side wall is connected to the top wall; The bottom wall has a first side surface in the second direction, and one end of the second side wall away from the top wall is connected to the first side surface.

17. The battery device according to claim 16, characterized in that The second side wall is provided with a third through hole, the first side surface is provided with a third threaded hole corresponding to the third through hole, and the battery device further includes a third fastener passing through the third through hole and connected to the third threaded hole.

18. The battery device according to claim 16, wherein: The battery device further includes a second sealant disposed between the second side wall and the first side surface.

19. The battery device according to any one of claims 1 to 18, characterized in that: There are two first side walls, the two first side walls are arranged opposite to each other along the first direction, and the battery cell assembly is arranged between the two first side walls.

20. An electrical device, characterized in that: The battery device comprises the battery device according to any one of claims 1 to 19, wherein the battery device is used to provide electrical energy.

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