Battery device and electric device

Abstract

The embodiment of the invention 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] This application relates to the field of battery device technology, and more specifically, to a battery device and an electrical device. Background Technology

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

[0003] In the manufacturing process of battery devices, the reliability of the battery device is a crucial issue that cannot be ignored. Therefore, how to improve the reliability of battery devices is a technical problem that urgently needs to be solved in battery technology. Summary of the Invention

[0004] This application provides a battery device and an electrical device that can improve the reliability of the battery device.

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

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

[0007] According to the battery device of the present application embodiment, the first sidewall of the first housing includes a first frame and a first panel. The first frame and the first panel are integrally extruded and formed. Both the first frame and the first panel have the advantage of dense structure. The first frame is welded to the first panel, so that the first sidewall has high airtightness, which facilitates the improvement of the sealing performance of the cavity formed by the first housing and other components, and facilitates the improvement of the reliability of the battery device.

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

[0009] In the above scheme, the dimension of the first frame along the first direction is larger than the dimension of the first panel along the first direction, and the first frame has higher overall strength so as to facilitate the connection of the first sidewall with other components; for example, threaded holes can be provided in the first frame, and other components can be connected to the threaded holes provided in the first frame to improve assembly efficiency.

[0010] According to some embodiments of this application, the first panel has a first surface facing away from the battery cell assembly, and a 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 up components (such as explosion-proof valves, water-cooled connectors, high and low voltage connectors, etc.), which helps to reduce the space occupied by the components in the first direction.

[0012] According to some embodiments of this application, the battery device further includes a second housing, which is fastened to the first housing, and the second housing and the first housing together form a receiving cavity for accommodating a battery cell assembly; a first opening is formed at one end of the second housing in a first direction, the first sidewall closes the first opening, and the second housing is connected to a first frame.

[0013] In the above scheme, the first sidewall closes the first opening, and the second box is connected to the first frame, which can increase the space of the receiving cavity in the third direction, improve the space utilization rate of the battery device in the third direction, and increase the volumetric energy density of the battery device.

[0014] According to some embodiments of this application, the second housing 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 first through hole facilitates the insertion of the first fastener and improves assembly efficiency; the first threaded hole facilitates the assembly of the first fastener with the first frame; the second housing and the first side wall have high connection stability, which is conducive to the assembly and disassembly of the second housing and the first side wall, and facilitates the maintenance and replacement of the battery cell assembly.

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

[0017] In the above solution, the first sealing element is disposed between the second housing and the first frame, so that the second housing and the first frame are sealed together, thereby achieving a seal between the second housing and the first side wall, improving the sealing performance of the battery device, and thus improving the reliability of the battery device.

[0018] According to some embodiments of this application, the first panel has two first edges disposed opposite to each other 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 segment, a second segment and a transition segment. The first segment is welded to the first edge, the second segment is welded to the second edge, and the transition segment connects the first segment and the second segment.

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

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

[0021] In the above scheme, there are two first frames, which are welded to two first edges respectively. The structure is simple and the processing difficulty is low.

[0022] According to some embodiments of this application, the first sidewall further includes a second frame, which is disposed on the second edge and integrally extruded with the first panel. The two ends of the second frame are respectively welded to the two first frames in the second direction, and the second box is connected to the second frame.

[0023] In the above scheme, the second frame and the first panel are integrally extruded and formed, and the welding area between the first frame and the first panel is small, which helps to reduce the risk of deformation of the first panel due to the high temperature of welding; the second box is connected to the second frame, which, together with the connection between the second box and the first frame, helps to improve the connection stability between the second box and the first side wall.

[0024] According to some embodiments of this application, the second housing 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 second through hole facilitates the insertion of the second fastener and improves assembly efficiency; the second threaded hole facilitates the assembly of the second fastener with the second frame, and the connection between the second housing and the first side wall has high stability, which is conducive to the assembly and disassembly of the second housing and the first side wall, and facilitates the maintenance and replacement of the battery cell assembly.

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

[0027] In the above scheme, a portion of the first sealing element is disposed between the second housing and the first frame, and another portion of the first sealing element is disposed between the second housing and the second frame, so that the second housing and the first frame are sealed together, and the second housing and the second frame are sealed together, thereby achieving a seal between the second housing and the first side wall, improving the sealing performance of the battery device, and thus improving the reliability of the battery device.

[0028] According to some embodiments of this application, the second segments of the two first frame borders are welded together.

[0029] In the above scheme, the second segments of the two first frames are welded together, the first panel can be a flat structure, and the two first frames can be mass-produced, making the processing of the first sidewall less difficult and the manufacturing cost lower.

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

[0031] In the above scheme, the first frame is an integral structure and the first panel is a flat structure, which is simple and easy to process and manufacture.

[0032] According to some embodiments of this application, the first frame includes a frame body and a flange portion. The flange portion is disposed on the inner peripheral 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 a first segment, the second part is located in a second segment, and the third part is located in a transition segment. The third part is welded to the first part and the third part is welded to the second part.

[0033] In the above scheme, the flange protrudes from the inner circumferential surface of the frame body, which can improve the strength of the frame body and give the first frame 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 relatively easy to process. For example, the processing of the first frame can be as follows: after the substrate is extruded, a notch can be made in the extruded structure, and the extruded structure is bent to form the first section, the second section and the transition section. Then, 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 this application, the cross-sections obtained by cutting along a cutting plane perpendicular to the first direction at any position of the first border are all the same.

[0035] In the above scheme, the cross-section obtained by cutting along the cutting plane perpendicular to the first direction at any position of the first frame is the same. The first frame can be integrally extruded 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 this application, the second housing includes a top wall and a second side wall, the top wall and the bottom wall are disposed opposite each other in a third direction, the second side wall is disposed on one side of the battery cell assembly in a 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 the end of the second side wall away from the top wall is connected to the first side surface.

[0037] In the above scheme, by connecting the end of the second sidewall away from the top wall to the first sidewall, the connection between the second housing and the first housing is realized, thereby improving the space utilization of the battery device in the third direction, so as to accommodate more battery cell components or reduce the volume of the battery device, thereby increasing the volumetric energy density of the battery device.

[0038] According to some embodiments of this application, the second sidewall is provided with a third through hole, the first sidewall is provided with a third threaded hole corresponding to the third through hole, and the battery device further 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 and improves assembly efficiency; the setting of the third threaded hole facilitates the assembly of the third fastener with the first side, and the connection between the second side wall and the bottom wall has high stability, which is conducive to the assembly and disassembly of the second housing and the bottom wall, and facilitates the maintenance and replacement of the battery cell assembly.

[0040] According to some embodiments of this application, the battery device further includes a second seal disposed between the second sidewall and the first sidewall.

[0041] In the above scheme, the second sealing element is disposed between the second side wall and the first side wall, so that the second side wall and the first side wall are sealed together, thereby achieving a seal between the second housing and the bottom wall, improving the sealing performance of the battery device, and thus improving the reliability of the battery device.

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

[0043] In the above scheme, the two first sidewalls are arranged opposite each other along the first direction, which facilitates the improvement of the sealing performance of the cavity formed by the first housing and other components, and facilitates the improvement of the reliability of the battery device.

[0044] Secondly, embodiments of this application also provide an electrical device, which includes a battery device provided according to any embodiment of the first aspect, the battery device being used to provide electrical energy.

[0045] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0046] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0047] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0048] Figure 2 This is an exploded view of the structure of a battery device provided in some embodiments of this application;

[0049] Figure 3 This is a schematic diagram of the structure of the first sidewall provided in some embodiments of this application;

[0050] Figure 4 for Figure 3 The diagram shown is an exploded view of the first sidewall.

[0051] Figure 5 This is a schematic diagram of the structure of the second housing provided in some embodiments of this application;

[0052] Figure 6 Schematic diagram of the structure of the first sidewall provided for other embodiments of this application;

[0053] Figure 7 for Figure 6 The diagram shown is an exploded view of the first sidewall.

[0054] Figure 8 A schematic diagram of the structure of the first sidewall provided for some embodiments of this application;

[0055] Figure 9 for Figure 8 The diagram shown is an exploded view of the first sidewall.

[0056] Figure 10 This is an assembly diagram of the second housing and the second frame provided for some embodiments of this application;

[0057] Figure 11 A schematic diagram of the structure of the first sidewall provided in some embodiments of this application;

[0058] Figure 12 for Figure 11 The diagram shown is an exploded view of the first sidewall.

[0059] Figure 13 This is a schematic diagram of the structure of the first border shown.

[0060] Figure 14 for Figure 13 A cross-sectional view along the AA direction.

[0061] Icons: 100 - Battery assembly; 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 housing; 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 Implementation

[0062] The embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to illustrate the principles of this application by way of example, but should not be used to limit the scope of this application, that is, this application is not limited to the described embodiments.

[0063] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having" and any variations thereof in the description, claims and foregoing drawings of this application are intended to cover non-exclusive inclusion.

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

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

[0066] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0067] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0068] In this application, "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more (including two), and "multiple pieces" refers to two or more (including two).

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

[0070] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells; as an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells into a single module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0071] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cell assemblies housed within the housing.

[0072] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0073] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0074] As an example, the enclosure may include a first enclosure and a second enclosure. The first enclosure and the second enclosure are fastened together to form a closed space inside the enclosure to house the individual battery cells. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first enclosure may be a top cover or a bottom plate.

[0075] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0076] As an example, the housing can be part of the vehicle's chassis structure. For instance, the housing's roof can be at least part of the vehicle's floor, or the housing's frame can be at least part of the vehicle's crossbeams and longitudinal beams.

[0077] In some embodiments, the battery device refers to an energy storage device, which includes a housing with a door on at least one side. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0078] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0079] The battery cell may be, but is not limited to, lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc.

[0080] A single battery cell typically includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charging and discharging process of a single battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, prevents short circuits while allowing 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 current collector has two surfaces opposite each other in its own thickness direction, and the positive active material is disposed on either or both of the two opposite surfaces of the positive current collector.

[0083] As an example, the positive electrode current collector can be a metal foil or a composite current collector. For example, as a metal foil, it can be made of stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel, or titanium with a silver-plated surface. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector can 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 phosphate, lithium transition metal oxide, and their respective modified compounds. However, this 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 can be a metal foil or a composite current collector. For example, as a metal foil, it can be aluminum with a silver-plated surface, stainless steel with a silver-plated surface, stainless steel, copper, aluminum, nickel, carbon electrode, or made of carbon, nickel, or titanium, etc.

[0087] In some embodiments, the negative electrode current collector has two surfaces opposite each other in its own 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 known in the art for use in batteries. 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, and lithium titanate, etc. Silicon-based materials may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. Tin-based materials may be selected from at least one of elemental tin, tin oxide compounds, and tin alloys. However, this application is not limited to these materials, and other conventional 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 membrane. This application does not impose any particular limitation on the type of separator membrane; any known porous separator membrane with good chemical and mechanical stability can be selected.

[0090] As an example, the main 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 located 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. The solid electrolyte is disposed between the positive and negative electrodes, serving both to transport ions and to isolate the positive and negative electrodes.

[0092] In some implementations, the electrode assembly is a wound structure. The positive and negative electrode sheets are wound into a wound structure.

[0093] In some implementations, the electrode assembly is a stacked structure.

[0094] In some embodiments, the battery cell may include a housing. The housing is used to encapsulate components such as electrode assemblies and electrolytes. The housing may be made of steel, aluminum, plastic (such as polypropylene), composite metal (such as copper-aluminum composite), or aluminum-plastic film, etc.

[0095] In some embodiments, the housing includes an end cap and a casing, the casing having an opening, and the end cap closing the opening to form a sealed space for accommodating substances such as electrode assemblies and electrolytes. The casing may have one or more openings. The end cap may also be provided one or more times.

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

[0097] In some implementations, an explosion-proof valve is provided on the housing. The explosion-proof valve is used to release the internal pressure of the battery cells.

[0098] In some embodiments, the housing can be a sealed structure or a non-sealed structure. As an example, when the housing is a sealed structure, it protects the electrode assembly and prevents leaks such as electrolyte leakage. When the housing is a non-sealed structure, it protects the electrode assembly, and a sealing bag may 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 material or an aluminum-plastic film.

[0099] As an example, a battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries.

[0100] The development of battery technology must take into account multiple design factors, such as performance parameters like energy density, discharge capacity, and charge / discharge rate. In addition, the reliability of the battery device also needs to be considered.

[0101] In some embodiments, the 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 supports the battery cell assembly, and the side walls are disposed on one side of the battery cell assembly. The housing requires high sealing performance, therefore, it needs to have high airtightness. However, the side walls are typically cast, and due to the casting process, casting porosity defects exist in the side walls. For housings with high sealing requirements, casting porosity can reduce the housing's sealing performance, and in severe cases, lead to airtight failure, resulting in low reliability of the battery device.

[0102] In view of this, to address the problem of low reliability of battery devices caused by porosity defects in the sidewalls of the cast battery, this application provides a battery device including a battery cell assembly and a first housing. The first housing includes a bottom wall and a first side wall. The bottom wall supports the battery cell assembly, and the first side wall is disposed on one side of the battery cell assembly along a first direction and connected to the bottom wall. The first side wall includes a first frame and a first panel. The first frame is disposed along the edge of the first panel, and the first frame and the first panel are integrally extruded and welded to each other. The first side wall has high airtightness, which improves the sealing performance of the battery device and thus enhances its reliability.

[0103] In such a battery device, the first sidewall of the first housing includes a first frame and a first panel. The first frame and the first panel are integrally extruded and formed. Both the first frame and the first panel have the advantage of dense structure. The first frame is welded to the first panel, so that the first sidewall has high airtightness, which facilitates the improvement of the sealing performance of the cavity formed by the first housing and other components, and facilitates the improvement of the reliability of the battery device.

[0104] The battery device disclosed in this application can be used, but is not limited to, in electrical devices such as vehicles, ships, or aircraft. A power system for such an electrical device can be constructed using the battery device disclosed in this application.

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

[0106] For ease of explanation, the following embodiments will be described using a vehicle as an example of an electrical device according to an embodiment of this application.

[0107] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is installed inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000's electrical system, such as meeting the power requirements for starting, navigation, and operation of the vehicle 1000.

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

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

[0110] Please refer to Figure 2 , Figure 2 This is an exploded view of the structure of a battery device provided in some embodiments of this application. The battery device 100 includes a housing 10 and a battery cell assembly 20, the battery cell assembly 20 being housed within the housing 10. The housing 10 provides a receiving space for the battery cell assembly 20, and the housing 10 can adopt various structures. In some embodiments, the housing 10 may include a first housing 11 and a second housing 12, the first housing 11 and the second housing 12 overlapping each other, the first housing 11 and the second housing 12 together defining a receiving 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, parallel, or a combination thereof. A combination thereof means that some of the battery cells are connected in series and others in parallel. The battery device 100 may also include other structures, such as a busbar component for electrical connection between the multiple battery cells.

[0112] Please refer to Figure 2 and further refer to Figure 3 , Figure 3 This is a schematic diagram of the structure of the first sidewall provided in some embodiments of this application. Figure 4 for Figure 3 The diagram shows an exploded view of the first sidewall. This application provides a battery device 100, which includes a battery cell assembly 20 and a first housing 11. The first housing 11 includes a bottom wall 111 and a first sidewall 112. The bottom wall 111 supports the battery cell assembly 20, and the first sidewall 112 is disposed on one side of the battery cell assembly 20 along a first direction X, and is connected to the bottom wall 111. The first sidewall 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, and the first frame 113 and the first panel 114 are integrally extruded and welded together.

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

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

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

[0116] In the diagram, the direction indicated by the letter X can be a first direction, which is perpendicular to the thickness direction of the bottom wall 111. The first direction X can be the length direction of the battery device 100, or it can be 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 together so that the connection between the first frame 113 and the first panel 114 has high airtightness, and the first sidewall 112 has high airtightness.

[0119] In some embodiments, one end of the first panel 114 is welded to the bottom wall 111, and the first frame 113 is disposed on the circumferential direction of the first panel 114 except for the edge connecting with the bottom wall 111, and the first frame 113 is welded to the bottom wall 111 so that the first sidewall 112 is firmly connected to the bottom wall 111 and the fit is sealed.

[0120] Due to the irregular structure of the first sidewall 112, the first sidewall 112 cannot be extruded as a whole. Therefore, the first sidewall 112 is split 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 respectively.

[0121] "The first frame 113 is set along the edge of the first panel 114" means that the inner peripheral surface 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 install components such as explosion-proof valves, water-cooled connectors, and high and low voltage connectors to facilitate the normal charging and discharging operation of the battery device 100.

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

[0124] "The first frame 113 is welded to the first panel 114" means that the inner circumferential surface of the first frame 113 is welded to the edge of the first panel 114.

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

[0126] According to the battery device 100 of the present application embodiment, the first sidewall 112 of the first housing 11 includes a first frame 113 and a first panel 114. The first frame 113 and the first panel 114 are integrally extruded and formed. Both the first frame 113 and the first panel 114 have the advantage of dense structure. The first frame 113 is welded to the first panel 114, so that the first sidewall 112 has high airtightness, which facilitates the improvement of the sealing performance of the cavity formed by the first housing 11 and other components, and facilitates the improvement of the reliability of the battery device 100.

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

[0128] The thickness direction of the first panel 114 can be parallel to the first direction X, and the dimension of the first panel 114 along the first direction X can be the thickness of the first panel 114.

[0129] In the above scheme, the dimension of the first frame 113 along the first direction X is larger than the dimension of the first panel 114 along the first direction X. The first frame 113 has higher overall strength so that the first sidewall 112 can be connected to other components. For example, threaded holes can be provided in the first frame 113, and other components can be connected to the threaded holes provided in the first frame 113 to improve assembly efficiency.

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

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

[0132] After the first frame 113 is assembled with the first panel 114, a portion of the first frame 113 is located on the side of the first panel 114 opposite to the battery cell assembly 20.

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

[0134] In some embodiments, the first panel 114 further has a second surface facing the battery cell assembly 20. The first surface 1141 and the second surface are disposed opposite to each other along the first direction X. The first frame 113 may protrude from the second surface so that a receiving space is formed between the first frame 113 and the second surface, which facilitates the reception of components and reduces 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 disposed opposite to each other along the first direction X. The first frame 113 may protrude from the first surface 1141 and the second surface, and can form receiving spaces on both sides of the first panel 114 along the first direction X, so as to accommodate components (such as explosion-proof valves, water-cooled connectors, high and low voltage connectors, etc.) disposed on the first panel 114, and to reduce the space occupied by the components in the first direction X.

[0136] Please refer to Figure 2 and further refer to Figure 5 , Figure 5 This is a schematic diagram of the structure of the second housing provided in some embodiments of this application. According to some embodiments of this application, the battery device 100 further includes a second housing 12, which is fastened to the first housing 11. The second housing 12 and the first housing 11 together form a receiving cavity for accommodating the battery cell assembly 20. A first opening 120 is formed at one end of the second housing 12 in the first direction X. The first sidewall 112 closes the first opening 120. The second housing 12 is connected to the first frame 113.

[0137] The second housing 12 is used to cooperate with the first housing 11 to form a receiving cavity for accommodating the battery cell assembly 20, which is housed within the receiving cavity.

[0138] In some embodiments, the first housing 11 can be regarded as the lower housing 10 of the battery device 100, and the second housing 12 can be regarded as the upper housing 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 disposed opposite each other along a third direction Z, and the two second side walls 122 are disposed 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, and the third direction Z, the second direction Y, and the first direction X are perpendicular to each other. The third direction Z can 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 can form 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-like structure corresponding to the first sidewall 112, so that the first sidewall 112 can close the first opening 120, reducing the number of additional parts of mutual interference or overlap generated by 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-sectional shape of the second box 12 can be U-shaped, and the cross-section of the second box 12 can be a cross-section obtained by cutting along a cutting plane perpendicular to the first direction X.

[0143] In the above scheme, the first sidewall 112 closes the first opening 120, and the second box 12 is connected to the first frame 113, which can increase the space of the receiving cavity in the third direction Z, improve the space utilization rate of the battery device 100 in the third direction Z, and improve the volumetric energy density of the battery device 100.

[0144] Please refer to Figures 2 to 5 According to some embodiments of this application, 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, 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 along the thickness direction of the wall of the second housing 12.

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

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

[0148] In some embodiments, there are multiple first through holes 123, which are distributed circumferentially along the first opening 120; there are multiple first threaded holes 1131, with each first through hole 123 corresponding to one first threaded hole 1131; and there are multiple first fasteners 31, with each first fastener 31 corresponding to one first through hole 123.

[0149] In the above scheme, the first through hole 123 facilitates the insertion of the first fastener 31 and improves assembly efficiency; the first threaded hole 1131 facilitates the assembly of the first fastener 31 with the first frame 113; the second housing 12 and the first side wall 112 have high connection stability, which facilitates the assembly and disassembly of the second housing 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 this application, the battery device 100 further includes a first seal 41 disposed between the second housing 12 and the first frame 113.

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

[0152] The first sealing element 41 is disposed between the inner surface of the second housing 12 and the outer peripheral surface of the first frame 113, wherein the inner surface of the second housing 12 refers to the surface of the second housing 12 facing the first housing 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 scheme, the first sealing element 41 is disposed between the second housing 12 and the first frame 113, so that the second housing 12 and the first frame 113 are sealed together, thereby achieving a seal between the second housing 12 and the first side wall 112, improving the sealing performance of the battery device 100, and thus improving the reliability of the battery device 100.

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

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

[0156] The first panel 114 also includes two third edges 114c, which connect the first edge 114a and the second edge 114b, and the transition segment 113c is welded to the third edges 114c.

[0157] In some embodiments, the two first edges 114a are parallel to each other and are straight; the second edge 114b is straight, and the first panel 114 can 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 segment 113a is welded to the first edge 114a, the second segment 113b is welded to the second edge 114b, and the transition segment 113c connects the first segment 113a and the second segment 113b, so that the first frame 113 and the first panel 114 have connection positions in both the first direction X and the third direction Z, which facilitates the improvement of 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 diagram of the structure of the first sidewall provided in some other embodiments of this application. Figure 7 for Figure 6 The diagram shown is an exploded view of the first sidewall. Figure 8 This is a schematic diagram of the structure of the first sidewall provided in some embodiments of this application. Figure 9 for Figure 8 The diagram shows an exploded view of the first sidewall. According to some embodiments of this application, there are two first frame borders 113, and the two first frame borders 113 are respectively welded to two first edges 114a.

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

[0162] In some embodiments, the two first frame borders 113 may have the same structure, which facilitates processing and manufacturing.

[0163] In the above scheme, there are two first frame 113s, and the two first frame 113s are welded to the two first edges 114a respectively. The structure is simple and the processing difficulty is low.

[0164] Please refer to Figure 6 and Figure 7 According to some embodiments of this application, the first sidewall 112 further includes a second frame 115, which is disposed on the second edge 114b and integrally extruded with the first panel 114. The two ends of the second frame 115 in the second direction Y are respectively welded to two first frames 113. The second housing 12 (see reference...) Figure 2 It is connected to the second border 115.

[0165] Along the second direction Y, the second border 115 is located between the two first borders 113, the second segment 113b of the first border 113 is positioned toward the second border 115, and the second segment 113b and the second border 115 together cover the second edge 114b of the first panel 114.

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

[0167] In the above scheme, the second frame 115 and the first panel 114 are integrally extruded and formed. The welding area between the first frame 113 and the first panel 114 is small, which helps to reduce the risk of deformation of the first panel 114 due to high welding temperature. The second box 12 is connected to the second frame 115 and is connected to the first frame 113, which helps to improve the connection stability between the second box 12 and the first side wall 112.

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

[0169] Please refer to Figure 10 , Figure 10 This is a schematic diagram of the assembly of the second housing and the second frame according to some embodiments of this application. According to some embodiments of this 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 penetrates the second housing 12 along the third direction Z.

[0171] The second threaded hole 1151 can be a threaded hole opened in the second frame 115, or the second threaded hole 1151 can 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. One end of the threaded section of the second fastener 32 passes through the second through hole 124 and engages with the second threaded hole 1151 to connect the second housing 12 to the first side wall 112, so as to improve the connection stability between the second housing 12 and the first side wall 112.

[0173] In some embodiments, there are multiple second through holes 124, which are spaced apart circumferentially along the first opening 120; there are multiple second threaded holes 1151, each corresponding to one second through hole 124; there are multiple second fasteners 32, each corresponding to one second through hole 124.

[0174] In the above scheme, the second through hole 124 facilitates the insertion of the second fastener 32 and improves assembly efficiency; the second threaded hole 1151 facilitates the assembly of the second fastener 32 and the second frame 115, and the second housing 12 and the first side wall 112 have high connection stability, which is conducive to the assembly and disassembly of the second housing 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 this application, the battery device 100 further includes a first seal 41, a portion of which is disposed between the second housing 12 and the first frame 113, and another portion of which is disposed between the second housing 12 and the second frame 115.

[0176] A portion of the first seal 41 is disposed between the inner surface of the second housing 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 housing 12 and the surface of the second frame 115 facing away from the bottom wall 111.

[0177] In the above scheme, a portion of the first sealing member 41 is disposed between the second housing 12 and the first frame 113, and another portion of the first sealing member 41 is disposed between the second housing 12 and the second frame 115, so that the second housing 12 and the first frame 113 are sealed together, and the second housing 12 and the second frame 115 are sealed together, thereby achieving a seal between the second housing 12 and the first side wall 112, improving the sealing performance of the battery device 100, and thus improving the reliability of the battery device 100.

[0178] Please refer to Figure 8 and Figure 9According to some embodiments of this application, the second segments 113b of the two first border frames 113 are welded together.

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

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

[0181] In the above scheme, the second segments 113b of the two first frame frames 113 are welded together, the first panel 114 can be a flat structure, and the two first frame frames 113 can be mass-produced, making the processing of the first sidewall 112 less difficult and the manufacturing cost lower.

[0182] Please refer to Figure 3 and Figure 4 and further refer to Figure 11 and Figure 12 , Figure 11 This is a schematic diagram of the structure of the first sidewall provided in some embodiments of this application. Figure 12 for Figure 11 The diagram shows an exploded view of the structure of the first sidewall. According to some embodiments of this application, the first frame 113 includes two first segments 113a and two transition segments 113c. The two first segments 113a are respectively welded to two first edges 114a, and each first segment 113a is connected to a second segment 113b through a transition segment 113c.

[0183] Two transition segments 113c are located at both ends of the second segment 113b along the second direction Y. The two transition segments 113c correspond one-to-one with the two first segments 113a. Each first segment 113a is connected to the second segment 113b through a transition segment 113c.

[0184] The first border 113 may be U-shaped, and the first border 113 surrounds the edge of the first panel 114 except for the edge that connects to the bottom wall 111.

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

[0186] Please refer to Figure 11 and Figure 12 and further refer to Figure 13 , Figure 13 for Figure 12The diagram shows the structure of the first frame. According to some embodiments of this application, the first frame 113 includes a frame body 1132 and a flange portion 1133. The flange portion 1133 is disposed on the inner peripheral surface of the frame body 1132. The flange portion 1133 includes a first part 1133a, a second part 1133b, and a third part 1133c. The first part 1133a is located in the first segment 113a, the second part 1133b is located in the second segment 113b, and the third part 1133c is located in the transition segment 113c. The third part 1133c is welded to the first part 1133a and the third part 1133c is welded to the second part 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 part 1133a corresponds to the first edge 114a, the second part 1133b corresponds to the second edge 114b, and the third part 1133c corresponds to the third edge 114c.

[0189] In some embodiments, the size of the frame body 1132 along the first direction X is larger 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 disposed opposite to each other along the first direction X. The first inner surface 1132a is disposed facing the battery cell assembly 20, and the first outer surface 1132b is disposed 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 machining of threaded holes on the first frame 113.

[0191] Please refer to Figure 14 , Figure 14 for Figure 13 A cross-sectional view along the AA direction. In some embodiments, the flange 1133 is flush with the first inner surface 1132a, which facilitates manufacturing and allows for the formation of a receiving space on the side of the first panel 114 away from the battery cell assembly 20, so as to accommodate components and reduce the space occupied by components in the first direction X.

[0192] In the above scheme, the flange 1133 protrudes from the inner circumferential surface of the frame body 1132, which can improve the strength of the frame body 1132, so that the first frame 113 has high 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 relatively easy to process. For example, the processing of the first frame 113 can be: the substrate is extruded into a long strip structure, four notches are opened at intervals 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.

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

[0194] The cross section obtained by cutting the first frame 113 with a cutting plane perpendicular to the first direction X can be called the cross section of the first frame 113.

[0195] The first frame 113 can be integrally extruded from the substrate along the first direction X, so that any cross-section of the first frame 113 is the same.

[0196] In the above scheme, the cross-section obtained by cutting along the cutting plane perpendicular to the first direction X at any position of the first frame 113 is the same. The first frame 113 can be integrally extruded 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 this application, the second housing 12 includes a top wall 121 and a second side wall 122. The top wall 121 and the bottom wall 111 are disposed opposite each other in the third direction Z. The second side wall 122 is disposed on one side of the battery cell assembly 20 in the second direction Y and is connected to the top wall 121. The bottom wall 111 has a first side surface 111a in the second direction Y, and the 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 faces 111a, and the two first side faces 111a are located at opposite ends of the bottom wall 111 in the second direction Y.

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

[0200] In the above scheme, by connecting the end of the second sidewall 122 away from the top wall 121 to the first sidewall 111a, the connection between the second housing 12 and the first housing 11 is realized, thereby improving the space utilization rate of the battery device 100 in the third direction Z, so as to accommodate more battery cell components 20 or reduce the volume of the battery device 100, thereby improving the volumetric energy density of the battery device 100.

[0201] Please refer to Figure 2 and Figure 5 According to some embodiments of this application, the second sidewall 122 is provided with a third through hole 1221, the first sidewall 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 that penetrates the second sidewall 122 along the second direction Y, and the thickness direction of the second sidewall 122 is parallel to the second direction Y.

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

[0204] The third fastener 33 can be a bolt or a fastener with a threaded section. After the threaded section of the third fastener 33 passes through the third through hole 1221, it engages with the third threaded hole 111b to connect the second side wall 122 to the first side wall 111a, so as to improve the connection stability between the second housing 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 spaced apart along the first direction X; there are multiple third threaded holes 111b, and each third threaded hole 111b corresponds to one third through hole 1221; there are multiple third fasteners 33, and each third fastener 33 corresponds to one 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 and improves assembly efficiency; the setting of the third threaded hole 111b facilitates the assembly of the third fastener 33 with the first side 111a; the second side wall 122 and the bottom wall 111 have high connection stability, which is conducive to the assembly and disassembly of the second housing 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 this application, the battery device 100 further includes a second seal 42 disposed between the second sidewall 122 and the first sidewall 111a.

[0208] The second seal 42 can be a sealant or a gasket. The second seal 42 is clamped between the inner surface of the second sidewall 122 and the first sidewall 111a.

[0209] In the above scheme, the second sealing element 42 is disposed between the second side wall 122 and the first side wall 111a, so that the second side wall 122 and the first side wall 111a are sealed together, thereby achieving a seal between the second housing 12 and the bottom wall 111, improving the sealing performance of the battery device 100, and thus improving the reliability of the battery device 100.

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

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

[0212] Two first sidewalls 112 can 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 volume of accommodating space.

[0213] In the above scheme, the two first sidewalls 112 are arranged opposite each other along the first direction X, which facilitates the improvement of the sealing performance of the receiving cavity formed by the first housing 11 and other components, and facilitates the improvement of the reliability of the battery device 100.

[0214] This application also provides an electrical device, which includes a battery device 100 provided according to any of the above embodiments, the battery device 100 being used to provide electrical energy.

[0215] The power supply device can be any of the above-mentioned applications of the battery device 100 as a power source for the device or system.

[0216] The above embodiments describe the structure of the battery device 100 provided in this application. The manufacturing method of the first sidewall 112 of the battery device 100 provided in the embodiments of this application will be described below.

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

[0218] S110, the substrate is integrally extruded to form a first part and a second part. The first part is L-shaped and there are two first parts. The first part can serve as a first frame 113. The second part includes a flat plate and a frame. The flat plate is rectangular and the frame protrudes from one side of the thickness direction of the flat plate.

[0219] S120, the second component is processed by cutting off portions at both ends of the frame in the length direction so that the length of the plate is greater than the length of the frame, thereby forming the structure of the first panel 114 and the second frame 115.

[0220] S130, the two first frame frames 113 are welded to the first panel 114 and the second frame frame 115 respectively. Specifically, the first segment 113a of the first frame frame 113 is welded to the first edge 114a of the first panel 114, the second segment 113b of the first frame frame 113 is welded to the second edge 114b of the first panel 114, the transition segment 113c of the first frame frame 113 is welded to the third edge 114c of the first panel 114, and the second segment 113b of the first frame frame 113 is welded to the second frame frame 115, thus obtaining the first sidewall 112 (see reference). Figure 6 and Figure 7 ).

[0221] Other embodiments of this application also provide a method for manufacturing a first sidewall 112, which includes:

[0222] S210, the substrate is integrally extruded to form a first component and a second component. The first component is elongated and includes a frame body 1132 and a flange 1133. The flange 1133 protrudes from one side of the frame body 1132. The second component is rectangular flat and can be a first panel 114.

[0223] S220, along the extension direction of the first component, four notches are opened at intervals on the flange portion 1133, and the first component is bent into a U shape. The first component forms a first segment 113a, a second segment 113b and a transition segment 113c. The flange portion 1133 includes a first part 1133a located in the first segment 113a, a second part 1133b located in the second segment 113b and a third part 1133c located in the transition segment 113c. 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 a first frame 113.

[0224] S230, the first frame 113 is welded to the first panel 114, wherein the first part 1133a is welded to the first edge 114a of the first panel 114, the second part 1133b is welded to the second edge 114b of the first panel 114, and the third part 1133c is welded to the third edge 114c of the first panel 114, thus obtaining the first sidewall 112 (see reference). Figures 11 to 13 ).

[0225] Some embodiments of this application also provide a method for manufacturing a first sidewall 112, which includes:

[0226] S310, the substrate is integrally extruded to form a first component and a second component. The first component is U-shaped and is a first frame 113. The second component is rectangular flat and can be a first panel 114.

[0227] S320, the first frame 113 is welded to the first panel 114, wherein the first segment 113a of the first frame 113 is welded to the first edge 114a of the first panel 114, the second segment 113b of the first frame 113 is welded to the second edge 114b of the first panel 114, and the transition segment 113c of the first frame 113 is welded to the third edge 114c of the first panel 114, thus obtaining the first sidewall 112. Figure 3 and Figure 4 ).

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

[0229] The second housing 12 is fastened to the first housing 11, and the second housing 12 and the first housing 11 together form a receiving space for accommodating the battery cell assembly 20. The battery cell assembly 20 includes multiple battery cells and is disposed within 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 a first direction X, and the battery cell assembly 20 is disposed between the two first side walls 112. The opposite ends of the bottom wall 111 in a second direction Y each have a first side surface 111a.

[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 a third direction Z, and the two second side walls 122 are arranged opposite each other along a second direction Y. The top wall 121 is located 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-sectional shape 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, and the first side wall 112 closes the first opening 120. The second housing 12 is provided with a first through hole 123, and the first frame 113 is provided with a first threaded hole 1131 corresponding to the first through hole 123. A first fastener 31 passes through the first through hole 123 and is connected to the first threaded hole 1131. The second sidewall 122 is provided with a third through hole 1221, and the first sidewall 111a is provided with a third threaded hole 111b corresponding to the third through hole 1221. The third fastener 33 passes through the third through hole 1221 and is connected to the third threaded hole 111b.

[0232] The first sidewall 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 integrally extruded and welded to 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 opposing first edges 114a in the second direction Y, and a second edge 114b in the third direction Z that is away from the bottom wall 111. 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 integrally extruded into a U-shaped frame. The first frame 113 includes two first segments 113a, a second segment 113b, and two transition segments 113c. The two first segments 113a are spaced apart along the second direction Y. The second segment 113b is located between the two first segments 113a. The transition segments 113c connect the first segments 113a and the second segment 113b. The first segments 113a are welded to the first edge 114a, the second segment 113b is welded to the second edge 114b, and the transition segments 113c are welded to the third edge 114c. In this design, the cross-section obtained by cutting the first frame 113 at any position along a cutting plane perpendicular to the first direction X is the same. The first frame 113 can be integrally extruded along the first direction X, which is convenient for processing. 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 has a bent structure and is U-shaped. The first frame 113 includes two first segments 113a, a second segment 113b, and two transition segments 113c. The two first segments 113a are spaced apart along the second direction Y. The second segment 113b is located between the two first segments 113a. The transition segments 113c connect the first segments 113a and the second segment 113b. The first frame 113 includes a frame body 1132 and a flange portion 1133. The flange portion 1133 is disposed on the inner circumferential surface of the frame body 1132 and includes a first portion. The first frame 1133 consists of three parts: 1133a, 1133b, and 1133c. The first part 1133a is located in the first segment 113a, the second part 1133b is located in the second segment 113b, and the third part 1133c is located in the transition segment 113c. The third part 1133c is welded to the first part 1133a, the third part 1133c is welded to the second part 1133b, the first part 1133a is welded to the first edge 114a, the second part 1133b is welded to the second edge 114b, and the third part 1133c is welded to the third edge 114c. In this design, the flange 1133 protrudes from the inner circumferential surface of the frame body 1132, which improves the strength of the frame body 1132, giving the first frame 113 higher overall strength. The third part 1133c is welded to the first part 1133a and the second part 1133b. The first frame 113 can be a bent structure, making it easier to manufacture. For example, the processing of the first frame 113 can be as follows: the substrate is extruded into a long strip structure, four notches are opened at intervals 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 sidewall 112 also includes a second frame 115, which is connected to the second edge 114b of the first panel 114 and integrally extruded with the first panel 114. The first frame 113 is L-shaped, and there are two first frames 113, spaced apart in the second direction Y. Each first frame 113 includes a first segment 113a, a second segment 113b, and a transition segment 113c. The first segment 113a is welded to the first edge 114a, the second segment 113b is welded to the second edge 114b, the transition segment 113c connects the first segment 113a and the second segment 113b, and is welded to the third edge 114c. The two ends of the second frame 115 in the second direction Y are respectively welded to the two first frames 113. 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 design, 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 to 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 sidewalls 112 are located at both ends of the bottom wall 111 in the first direction X. The first sidewalls 112 close the first opening 120. The second housing 12 is connected to the first frame 113, which increases the space of the receiving cavity in the third direction Z, thereby improving the space utilization rate of the battery device 100 in the third direction Z and increasing the volumetric energy density of the battery device 100. The first frame 113 and the first panel 114 are integrally extruded and formed. Both the first frame 113 and the first panel 114 have the advantage of dense structure. The first frame 113 is welded to the first panel 114, which gives the first sidewall 112 high airtightness, which facilitates the improvement of the sealing performance of the receiving cavity formed by the first housing 11 and other components, and facilitates the improvement of the reliability of the battery device 100.

[0237] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: Battery cell assembly; The first housing includes a bottom wall and a first side wall. 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 is connected to the bottom wall. The first sidewall includes a first frame and a first panel. The first frame is disposed along the edge of the first panel. The first frame and the first panel are integrally extruded and formed. The first frame is welded to the first panel.

2. The battery device according to claim 1, characterized in that, Along the first direction, the size of the first border is larger than the size of the first panel.

3. The battery device according to claim 1 or 2, characterized in that, The first panel has a first surface that is opposite to the battery cell assembly, and the first frame protrudes from the first surface.

4. The battery device according to any one of claims 1-3, characterized in that, The battery device also includes: The second housing is fastened to the first housing, and the second housing and the first housing together form a receiving cavity for accommodating the battery cell assembly; The second housing has a first opening at one end in the first direction, the first sidewall closes the first opening, and the second housing is connected to the first frame.

5. The battery device according to claim 4, characterized in that, The second housing 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.

6. The battery device according to claim 4 or 5, characterized in that, The battery device further includes a first seal, which is disposed between the second housing and the first frame.

7. The battery device according to any one of claims 4-6, characterized in that, The first panel has two opposing first edges in a second direction, and 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 segment, a second segment, and a transition segment. The first segment is welded to the first edge, the second segment is welded to the second edge, and the transition segment connects the first segment and the second segment.

8. The battery device according to claim 7, characterized in that, There are two first borders, and the two first borders are welded to the two first edges respectively.

9. The battery device according to claim 8, characterized in that, The first sidewall also includes a second frame, which is disposed on the second edge and integrally extruded 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 is connected to the second frame.

10. The battery device according to claim 9, characterized in that, The second housing is provided with a second through hole, and the second frame is provided with a second threaded hole corresponding to the second through hole. The battery device also includes a second fastener, which passes through the second through hole and is 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 which is disposed between the second housing and the first frame, and another portion of which is disposed between the second housing and the second frame.

12. The battery device according to claim 8, characterized in that, The second segments of the two first frame borders are welded together.

13. The battery device according to claim 7, characterized in that, The first frame includes two first segments and two transition segments, the two first segments are respectively welded to the two first edges, and each first segment is connected to the second segment through a transition segment.

14. The battery device according to claim 13, characterized in that, The first frame includes a frame body and a flange portion. The flange portion is disposed on the inner peripheral 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 segment, the second part is located in the second segment, and the third part is located in the transition segment. 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, characterized in that, Cutting along a cutting plane perpendicular to the first direction at any position on the first border will result in identical cross-sections.

16. The battery device according to any one of claims 4-15, characterized in that, The second housing includes a top wall and a second side wall. The top wall and the bottom wall are arranged opposite each other in a third direction. The second side wall is disposed on one side of the battery cell assembly in a second direction and is connected to the top wall. The bottom wall has a first side surface in the second direction, and the 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 sidewall is provided with a third through hole, and the first sidewall is provided with a third threaded hole corresponding to the third through hole. The battery device also includes a third fastener, which passes through the third through hole and is connected to the third threaded hole.

18. The battery device according to claim 16 or 17, characterized in that, The battery device further includes a second seal disposed between the second sidewall and the first sidewall.

19. The battery device according to any one of claims 1-18, characterized in that, The number of first sidewalls is two, and the two first sidewalls are arranged opposite each other along the first direction, with the battery cell assembly disposed between the two first sidewalls.

20. An electrical device, characterized in that, Includes a battery device as described in any one of claims 1-19, the battery device being used to provide electrical energy.

Images