Battery device and electric equipment

Abstract

The utility model provides a battery device and electric equipment, and the battery device comprises a box body assembly which is internally provided with a containing cavity; wherein the box body assembly comprises a bottom wall, a top wall and a side wall, the bottom wall and the top wall are oppositely arranged, and the side wall is connected with the bottom wall and the top wall; the bottom wall, the top wall and the side walls jointly define the containing cavity. The plurality of single batteries are arranged in the accommodating cavity; and the reinforcing structural part is arranged in the containing cavity, and the reinforcing structural part is at least connected with one of the bottom wall, the top wall and the side wall. The reinforcing structural member is beneficial to reinforcing the structural strength of at least one of the bottom wall, the top wall and the side wall, so that the structural strength of the box body assembly is enhanced, the anti-collision capability of the battery device is further enhanced, the maintenance cost of the battery device is reduced, and the reliability of related electric equipment is improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery device and electrical equipment. Background Technology

[0002] Side-impact accidents are relatively common in road traffic, making the side-impact protection performance of battery devices crucial. Specifically, during a side collision, the battery device may be damaged, potentially leading to short circuits, fires, or even explosions, posing a significant threat to the lives of passengers and those around the vehicle. Furthermore, side-impact damage to the battery device incurs high repair costs. The collision protection performance of related battery devices is generally limited. Utility Model Content

[0003] This application provides a battery device and an electrical appliance to solve the technical problem of how to improve the anti-collision performance of a battery device.

[0004] This application provides a battery device, including:

[0005] A housing assembly with an internal receiving cavity; wherein the housing assembly includes a bottom wall, a top wall, and a side wall, the bottom wall and the top wall being disposed opposite each other, and the side wall connecting the bottom wall and the top wall; the bottom wall, the top wall, and the side wall together form the receiving cavity;

[0006] A single battery cell, and multiple said battery cells are disposed within the receiving cavity;

[0007] A reinforcing structural member is disposed within the receiving cavity, and the reinforcing structural member is connected to at least one of the bottom wall, the top wall, and the side wall.

[0008] This application embodiment, by placing a reinforcing structural member within the receiving cavity and connecting at least one of the bottom wall, top wall, and side wall, enhances the structural strength of at least one of the bottom wall, top wall, and side wall when the battery device is subjected to an impact. This strengthens the battery device's anti-collision capability, reduces the cost of battery device maintenance, and improves the reliability of related electrical equipment.

[0009] In some embodiments, the reinforcing structural members jointly connect the bottom wall and the side wall; and / or, the reinforcing structural members jointly connect the top wall and the side wall.

[0010] The embodiments of this application fix two walls in the box assembly with the same reinforcing structural member, such as the reinforcing structural member connecting the bottom wall and the side wall, or the reinforcing structural member connecting the top wall and the side wall. This helps to enhance the strength of the connection between two adjacent walls in the box assembly and further enhances the structural strength of the box assembly.

[0011] In some embodiments, the reinforcing structural member includes:

[0012] A first reinforcing part, which is at least partially fixedly connected to the bottom wall; or, a first reinforcing part, which is at least partially fixedly connected to the top wall;

[0013] The second reinforcing part is at least partially fixedly connected to the side wall;

[0014] The first reinforcing part is connected to the second reinforcing part.

[0015] This application embodiment sets the reinforcing structural member into two parts, namely a first reinforcing part and a second reinforcing part. The first reinforcing part is used to fix the bottom wall or the top wall, and the second reinforcing part is used to fix the side wall. This is beneficial to strengthen the structural strength of the bottom wall, the top wall or the side wall respectively, and also to further enhance the structural strength between adjacent bottom walls, side walls and top walls, thereby further enhancing the overall anti-side collision capability of the box structure.

[0016] In some embodiments, the first reinforcing portion is fitted to the surface of the bottom wall; or, the first reinforcing portion is fitted to the surface of the top wall.

[0017] The embodiments of this application, by attaching the first reinforcing part to the surface of the bottom wall or attaching the first reinforcing part to the surface of the top wall, can improve the connection strength between the first reinforcing part and the bottom or top wall, thereby further improving the reinforcing effect of the first reinforcing part on the structural strength of the housing assembly.

[0018] In some embodiments, the second reinforcing portion is fitted to the surface of the sidewall.

[0019] In this embodiment, by fitting the second reinforcing part to the surface of the side wall, the connection strength between the second reinforcing part and the side wall is improved, thereby further enhancing the structural strength of the housing assembly by the second reinforcing part.

[0020] In some embodiments, the first reinforcing portion and the second reinforcing portion are arranged at an angle.

[0021] The embodiments of this application, by setting the first reinforcing part and the second reinforcing part at an angle, are beneficial to improving the effect of the first reinforcing part and the second reinforcing part on the structural reinforcement of the box assembly.

[0022] In some embodiments, the included angle between the first reinforcing part and the second reinforcing part is greater than or equal to 80 degrees and less than or equal to 120 degrees.

[0023] This application embodiment sets the included angle between the first reinforcing part and the second reinforcing part to be greater than or equal to 80 degrees and less than or equal to 120 degrees, which is beneficial to improving the fit between the first reinforcing part and the top or bottom wall, strengthening the fit between the second reinforcing part and the side wall, and also improving the structural strength of the connection between the first reinforcing part and the second reinforcing part, thereby enhancing the overall structural strength of the housing assembly.

[0024] In some embodiments, the included angle between the first reinforcing part and the second reinforcing part is greater than or equal to 90 degrees and less than or equal to 100 degrees.

[0025] The embodiments of this application, by setting a certain included angle between the first reinforcing part and the second reinforcing part, and limiting the included angle between the first reinforcing part and the second reinforcing part to between 90 degrees and 100 degrees, can not only improve the compatibility of the first reinforcing part and the second reinforcing part with the housing assembly, but also further enhance the structural strength performance of the first reinforcing part and the second reinforcing part on the housing assembly, thereby further enhancing the anti-collision performance of the battery device.

[0026] In some embodiments, the reinforcing structural members are provided in multiples, and the multiple reinforcing structural members are spaced apart in a first direction, wherein the first direction is the length direction of the housing assembly.

[0027] The embodiments of this application, by arranging reinforcing structural members at intervals along the length of the housing assembly, can increase the impact resistance of the housing assembly. Furthermore, arranging the reinforcing structures at intervals can improve the flexibility of the reinforcing structural member arrangement and further improve the energy density of the battery device.

[0028] In some embodiments, the housing assembly further includes a protrusion formed on the bottom wall and / or the top wall, and the protrusion is used to secure the reinforcing structural member.

[0029] In this embodiment, a protrusion is provided on the housing assembly. This protrusion can fix the reinforcing structural member, thereby enhancing the connection stability of the reinforcing structural member relative to the housing assembly and thus enhancing the impact resistance performance of the housing assembly.

[0030] In some embodiments, the protrusion is integrally stamped from the bottom wall, and the protrusion protrudes toward the receiving cavity;

[0031] or,

[0032] The protrusion is integrally stamped from the top wall, and the protrusion is oriented towards the receiving cavity.

[0033] In this embodiment, the protrusion can be integrally stamped using a punch, so that the protrusion is formed directly on the bottom wall during the processing. This helps to reduce the processing steps of the bottom wall, improve the processing efficiency of the housing assembly, and also helps to improve the structural strength of the protrusion.

[0034] In some embodiments, the protrusion and the sidewall are spaced apart in a second direction, and the reinforcing structural member abuts between the sidewall and the protrusion in a second direction, wherein the second direction is the width direction of the housing assembly.

[0035] In this embodiment, the protrusion is fixed to the sidewall in a second direction, and the reinforcing structural member abuts against the sidewall and the protrusion in the second direction. On the one hand, the protrusion can support the reinforcing structural member in the second direction, so that the reinforcing structural member can apply the supporting force to the sidewall, thereby improving the overall impact resistance of the box assembly. On the other hand, the protrusion can fix the reinforcing structural member. That is to say, the reinforcing structural member can not only be fixed to the bottom wall, top wall or sidewall, but also to the protrusion, further enhancing the deformation resistance of the box assembly.

[0036] In some embodiments, the reinforcing structural member is welded to the protrusion.

[0037] The embodiments of this application fix the reinforcing structural member and the protrusion by welding, which helps to improve the connection strength between the reinforcing structural member and the bottom or top wall, and further enhances the deformation resistance of the box assembly.

[0038] In some embodiments, the reinforcing structural member has a first end face at one end in the second direction, and the first end face is welded and fixed to the protrusion.

[0039] This application embodiment increases the connection strength between the reinforcing structural member and the protrusion by providing a first end face in the second direction, thereby improving the overall structural strength of the housing assembly.

[0040] In some embodiments, the protrusions are provided in multiple portions, and the multiple protrusions are spaced apart in a first direction.

[0041] This application embodiment sets multiple protrusions, and the multiple protrusions are spaced apart in a first direction, which represents the length direction of the housing assembly. This helps to improve the structural strength of the housing assembly, thereby improving the side impact resistance of the battery device.

[0042] In some embodiments, the number of protrusions is the same as the number of reinforcing structural members.

[0043] This application embodiment, by setting the number of protrusions to correspond with the reinforcing structural members, helps to enhance the structural strength of the corresponding reinforcing structural members, thereby strengthening the overall structural strength of the housing assembly and improving the deformation resistance of the battery device.

[0044] In some embodiments, the housing assembly is configured as a sheet metal stamped housing.

[0045] This application embodiment sets the housing assembly in a sheet metal stamping housing, and sets reinforcing structural members in the sheet metal stamping housing. The reinforcing structural members are set in at least one of the bottom wall, top wall and side wall of the housing assembly, which helps to enhance the housing assembly's ability to resist collision deformation, improve the bending and torsional performance of the housing assembly, help maintain the stability of the housing during side collisions, and help absorb collision energy and reduce the impact force transmitted to the battery cells during collisions.

[0046] This application also provides an electrical device, including:

[0047] The battery device according to any of the foregoing claims is used to provide electrical energy.

[0048] This application provides a battery device and an electrical appliance. The battery device includes a housing assembly, individual battery cells, and reinforcing structural members. The housing assembly has an internal cavity and includes a bottom wall, a top wall, and a side wall. The bottom wall and top wall are opposite each other, and the side wall connects to the bottom wall and top wall. The bottom wall, top wall, and side wall together enclose the cavity. Multiple individual battery cells are disposed within the cavity. The reinforcing structural members are disposed within the cavity and are connected to at least one of the bottom wall, top wall, and side wall. By placing the reinforcing structural members within the cavity and connecting them to at least one of the bottom wall, top wall, and side wall, this application provides that during a collision, external forces act on the housing assembly. The reinforcing structural members strengthen the structural strength of at least one of the bottom wall, top wall, and side wall, thereby enhancing the structural strength of the housing assembly, further improving the battery device's collision resistance, reducing maintenance costs, and increasing the reliability of the related electrical appliance. Attached Figure Description

[0049] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without creative work.

[0050] Figure 1 This is a schematic diagram of the structure of the electrical equipment disclosed in the embodiments of this application;

[0051] Figure 2This is a schematic diagram of the battery device disclosed in the embodiments of this application;

[0052] Figure 3 This is a top view of the housing assembly of the battery device disclosed in the embodiments of this application;

[0053] Figure 4 This is a schematic diagram of the connection between the reinforcing structural member and the box assembly disclosed in the embodiments of this application;

[0054] Figure 5 This is a top view of the connection between the reinforcing structural member and the housing assembly disclosed in the embodiments of this application;

[0055] Figure 6 This is a side view of the connection between the reinforcing structural member and the housing disclosed in the embodiments of this application.

[0056] The accompanying drawings are not drawn to scale.

[0057] Marker explanation:

[0058] 1000, Vehicle; 100, Battery unit; 200, Controller; 300, Motor; 10, Battery cell; 2, Housing assembly; 20, Receiving cavity; 201, Bottom wall; 202, Top wall; 203, Side wall; 204, Protrusion; 211, Supporting component; 214, Top cover; 3, Reinforcing structural component; 310, First reinforcing part; 320, Second reinforcing part; 330, First end face. Detailed Implementation

[0059] It should be noted that, unless otherwise specified, the embodiments and technical features in the embodiments of this application can be combined with each other, and the detailed descriptions in the specific implementation should be understood as explanations of the purpose of this application and should not be regarded as undue limitations on this application.

[0060] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having” and any variations thereof are intended to cover non-exclusive inclusion.

[0061] In the description of the embodiments of this application, technical terms such as "first," "second," and "third" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0062] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0063] In the description of the embodiments 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, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0064] In the description of the embodiments of this application, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", "height direction", "first direction", "second direction", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0065] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0066] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0067] With the development of clean energy, more and more devices are using electricity as their driving force, leading to the rapid development of power batteries, such as lithium-ion batteries, which can store a large amount of electrical energy and can be repeatedly charged and discharged. These power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields.

[0068] With the government's strong promotion of new energy vehicles, they have ushered in a golden opportunity for development. Vehicle safety and stability have always been top concerns. Therefore, improving the safety of new energy vehicles will be one of the key factors determining their rapid popularization. Improving battery safety is a crucial way to enhance the overall safety of new energy vehicles.

[0069] The battery apparatus mentioned in the embodiments of this application refers to a single physical module comprising one or more individual battery cells, or one or more battery cell assemblies, for providing higher voltage and capacity. A battery cell assembly may include multiple individual battery cells connected in series, parallel, or in a mixed configuration 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, where multiple battery cells are arranged and fixed together to form an independent battery 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 cells 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 individual battery cells or battery module assemblies. 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 individual battery cells or battery module assemblies.

[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] A single battery cell may include an electrode assembly and an electrolyte. The electrode assembly consists of a positive electrode, a negative electrode, and a separator. The battery cell primarily functions by the movement of metal ions between the positive and negative electrode plates. The positive electrode includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive current collector, and the uncoated positive current collector protrudes beyond the coated positive current collector, serving as the positive electrode tab. Taking a lithium-ion battery as an example, the positive current collector can be made of aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode includes a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative current collector, and the uncoated negative current collector protrudes beyond the coated negative current collector, serving as the negative electrode tab. The negative electrode current collector can be made of copper, and the negative electrode active material can be carbon or silicon, etc. To ensure that a large current can pass through without melting, there are multiple positive electrode tabs stacked together, and there are multiple negative electrode tabs stacked together. The separator can be made of PP (polypropylene) or PE (polyethylene), etc.

[0079] For 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.

[0080] For example, the positive electrode current collector can be a metal foil or a composite current collector. For instance, the metal foil can be silver-plated aluminum, silver-plated stainless steel, stainless steel, copper, aluminum, nickel, carbon electrodes, carbon, nickel, or titanium. The composite current collector may include a polymer substrate 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 substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0081] For example, the negative electrode can be a negative electrode sheet, which may include a negative electrode current collector.

[0082] For example, the negative electrode current collector can be a metal foil or a composite current collector. For instance, 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, carbon, nickel, or titanium, etc.

[0083] For example, 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.

[0084] Exemplarily, the negative electrode active material may be any 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.

[0085] A battery cell also includes an insulating film and a casing. The insulating film covers the outside of the electrode assembly, and the casing encapsulates the electrode assembly covered with the insulating film to form the battery cell. The insulating film can be a Mylar film, and the casing can be an aluminum casing or a steel casing. After the electrode assembly is wound and formed, the Mylar film and casing are encapsulated through a Mylar film wrapping process and a casing insertion process. The Mylar film serves to seal and protect the electrode assembly, and it effectively insulates the electrode assembly and casing from each other, preventing internal short circuits within the battery cell. The casing provides protection.

[0086] Exemplarily, the housing includes a top cover and an outer shell, the outer shell having an opening, and the top cover closing the opening to form a sealed space for accommodating substances such as electrode assemblies and electrolytes. The outer shell may have one or more openings. The top cover may also have one or more openings.

[0087] For example, the housing is provided with at least one electrode terminal, which 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 top cover or on the outer casing.

[0088] For example, a pressure relief component is provided on the housing. The pressure relief component is used to release the internal pressure of the battery cell. It should be noted that the pressure relief component can be an explosion-proof valve or a pressure relief port, etc.

[0089] The development of battery technology must take into account multiple design factors, such as energy density, discharge capacity, charge-discharge rate and other performance parameters. In addition, the safety and reliability of the battery also need to be considered.

[0090] In existing technologies, side-impact accidents are relatively common in road traffic. Therefore, the side-impact protection performance of battery devices is also quite important. Specifically, during a side impact, the battery device may be damaged, leading to serious consequences such as short circuits, fires, or even explosions. This poses a significant threat to the lives of passengers and people around the vehicle, and repair costs are high after side-impact damage to the battery device. The collision protection performance of related battery devices is generally limited.

[0091] This application provides a battery device comprising a housing assembly, individual battery cells, and reinforcing structural members. The housing assembly has an internal cavity and includes a bottom wall, a top wall, and side walls. The bottom wall and top wall are opposite each other, and the side walls connect to the bottom and top walls, collectively forming the cavity. Multiple battery cells are disposed within the cavity. The reinforcing structural members are disposed within the cavity and are connected to at least one of the bottom, top, and side walls. By placing the reinforcing structural members within the cavity and connecting them to at least one of the bottom, top, and side walls, this application provides an advantage in strengthening the structural strength of at least one of the bottom, top, and side walls during a collision. This enhances the battery device's collision resistance, reduces maintenance costs, and improves the reliability of related electrical equipment.

[0092] The technical solutions described in the embodiments of this application are applicable to electrical devices that use batteries. The electrical devices include batteries from any embodiment of this application, and the batteries are used to provide electrical energy.

[0093] Electrical equipment can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This application does not impose any special limitations on the above-mentioned electrical equipment.

[0094] It should be noted that the technical solutions described in the embodiments of this application are not limited to the battery devices and electrical equipment described above, but can also be applied to all battery devices including housing components and electrical equipment using battery devices. However, for the sake of brevity, the following embodiments are all described using electric vehicles as examples.

[0095] Please refer to Figure 1 The vehicle 1000 may contain a controller 200, a motor 300, and a battery device 100. The controller 200 controls the battery device 100 to supply power to the motor 300. For example, the battery device 100 may 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, it can serve as the operating power source for the vehicle 1000's electrical system, such as for the power requirements of starting, navigation, and operation. In another embodiment 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, replacing or partially replacing fuel or natural gas to provide driving power to the vehicle 1000.

[0096] To meet different power demands, the battery device 100 may include multiple battery cells 10, where each battery cell 10 is the smallest unit constituting a battery module or battery device 100. Multiple battery cells 10 can be connected in series, parallel, or in a hybrid configuration, where some cells are connected in series and others in parallel. Multiple battery cells 10 can be directly connected in series, parallel, or in a hybrid configuration, and then the entire assembly of the multiple battery cells 10 is housed within a housing assembly. Alternatively, the battery device 100 may consist of multiple battery cells first connected in series, parallel, or in a hybrid configuration to form battery modules, which are then connected in series, parallel, or in a hybrid configuration to form a whole and housed within a housing assembly. The battery device 100 may also include other structures; for example, it may include a busbar component for electrical connection between multiple battery cells. Each battery cell can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. Battery cells can be cylindrical, flat, cuboid, or other shapes.

[0097] The enclosure component can be a simple three-dimensional structure such as a cuboid, cylinder, or sphere, or a complex three-dimensional structure composed of simple three-dimensional structures such as cuboids, cylinders, or spheres. The material of the enclosure component can be an alloy material such as aluminum alloy or iron alloy, a polymer material such as polycarbonate or polyisocyanurate foam, or a composite material such as glass fiber and epoxy resin.

[0098] The housing assembly is used to house the battery assembly, and the housing assembly can have various structures. See [link to relevant documentation] in some embodiments. Figure 2 The housing assembly may include a top cover 214 and a support member 211, which are fitted together to define a receiving cavity for accommodating the battery cell 10. The support member 211 may be a hollow structure open at one end, and the top cover 214 may be a plate-like structure, fitting over the open side of the support member 211 to form a housing assembly with a receiving cavity. Alternatively, both the top cover 214 and the support member 211 may be hollow structures open on one side, with the open side of the top cover 214 fitting over the open side of the support member 211 to form a housing assembly with a receiving cavity. Of course, the top cover 214 and the support member 211 may be of various shapes, such as cylinders or cuboids.

[0099] To improve the sealing performance after the top cover 214 is connected to the carrier 211, a sealing element, such as sealant or sealing ring, can also be provided between the top cover 214 and the carrier 211.

[0100] Assuming that the upper cover 214 covers the top of the support member 211, the upper cover 214 can also be called the upper box cover, and the support member 211 can also be called the lower box cover.

[0101] Combination Figures 2-4 As shown, this application provides a battery device, which includes a housing assembly 2, a battery cell 10, and a reinforcing structural member 3. (Refer to...) Figure 2 As shown, the housing assembly 2 has an internal receiving cavity 20. The housing assembly 2 includes a bottom wall 201, a top wall 202, and side walls 203. The bottom wall 201 and top wall 202 are positioned opposite each other, meaning they are spaced apart in the height direction. The side walls 203 connect the bottom wall 201 and top wall 202. It should be noted that the side walls refer to all the wall surfaces in the housing assembly 2 that connect the bottom wall 201 and top wall 202; that is, the side wall 203 can be formed by multiple wall surfaces. The side wall 203 can be formed by one component or by multiple components; specifically, as shown... Figure 2 As shown, the housing assembly includes two parts: a top cover 214 and a support member 211. The top wall 201 of the housing assembly 2 can be formed by the top wall of the top cover 214, the bottom wall 201 of the housing assembly 2 can be formed by the bottom wall of the support member 211, the side wall 203 of the housing assembly 2 can be formed only by the side wall of the top cover 214, the side wall 203 of the housing assembly 2 can be formed only by the side wall of the support member 211, or the side wall 203 of the housing assembly can be formed by the side wall of the support member 211 and the side wall of the top cover 214 together.

[0102] Multiple battery cells 10 are disposed within the receiving cavity 20. In this embodiment, the battery cells 10 may be multiple battery cells 10 forming a module disposed within the receiving cavity 20, or multiple battery cells 10 forming a battery cell assembly disposed within the receiving cavity 20. Regardless of the grouping form of the battery cells 10 disposed within the battery module, it will not limit the structure of the housing assembly 2 in this embodiment.

[0103] Combination Figure 2 and Figure 4 As shown, the reinforcing structural member 3 is disposed within the receiving cavity 20, and the reinforcing structural member 3 is connected to at least one of the bottom wall 201, the top wall 202, and the side wall 203. That is to say, in this embodiment of the application, the reinforcing structural member 3 can be provided as one or more. The same reinforcing structural member 3 can be connected only to the bottom wall 201, the same reinforcing structural member 3 can be connected only to the top wall 202, the same reinforcing structural member 3 can be connected only to the side wall 203, the same reinforcing structural member 3 can also be connected to the bottom wall 201 and the side wall 203, the same reinforcing structural member 3 can also be connected to the top wall 202 and the side wall 203, and the same reinforcing structural member 3 can also be connected to the bottom wall 201, the top wall 202, and the side wall 203.

[0104] The connection described in this embodiment indicates that the reinforcing structure 3 has a relatively stable positional relationship with at least one of the bottom wall 201, top wall 202, and side wall 203, such that the reinforcing structure 3 maintains a relatively fixed positional relationship with at least one of the bottom wall 201, top wall 202, and side wall 203. During a collision, external forces act on the battery pack assembly. Since the reinforcing structure is located within the cavity and connects to at least one of the bottom wall, top wall, and side wall, it helps to strengthen the structural strength of at least one of the bottom wall, top wall, and side wall, thereby strengthening the structural strength of the pack assembly, further enhancing the battery pack's collision resistance, reducing battery pack maintenance costs, and improving the reliability of related electrical equipment.

[0105] This application provides a battery device comprising a housing assembly, individual battery cells, and reinforcing structural members. The housing assembly has an internal cavity and includes a bottom wall, a top wall, and side walls. The bottom wall and top wall are opposite each other, and the side walls connect to the bottom and top walls, collectively forming the cavity. Multiple battery cells are disposed within the cavity. The reinforcing structural members are disposed within the cavity and are connected to at least one of the bottom, top, and side walls. By placing the reinforcing structural members within the cavity and connecting them to at least one of the bottom, top, and side walls, this application provides an advantage in strengthening the structural strength of at least one of the bottom, top, and side walls during a collision. This enhances the battery device's collision resistance, reduces maintenance costs, and improves the reliability of related electrical equipment.

[0106] In some embodiments, such as Figure 2 and Figure 4 As shown, the reinforcing structural member 3 connects the bottom wall 201 and the side wall 203; and / or, the reinforcing structural member 3 connects the top wall 202 and the side wall 203. That is, the same reinforcing structural member 3 can connect at least two walls in the housing assembly 2, specifically, the two walls can be two adjacent walls in the housing assembly 2.

[0107] In this embodiment, by fixing two walls in the housing assembly 2 with the same reinforcing structural member 3, such as the reinforcing structural member 3 connecting the bottom wall 201 and the side wall 203, or the reinforcing structural member connecting the top wall 202 and the side wall 203, it is beneficial to enhance the connection strength between two adjacent walls in the housing assembly and further enhance the structural strength of the housing assembly.

[0108] In some embodiments, such as Figures 3-5As shown, the reinforcing structural member 3 includes a first reinforcing part 310 and a second reinforcing part 320. The first reinforcing part 310 is at least partially fixedly connected to the bottom wall 201; or, the first reinforcing part 310 is at least partially fixedly connected to the top wall; the second reinforcing part 320 is at least partially fixedly connected to the side wall 203; wherein, the first reinforcing part 310 and the second reinforcing part 320 are connected.

[0109] It should be noted that the first reinforcing part 310 and the second reinforcing part 320 in the embodiments of this application can be welded and fixed by two independent components. The first reinforcing part 310 and the second reinforcing part 320 can also be integrally processed and formed by an integral component, which is beneficial to improve the overall structural strength of the reinforcing structural component 3 and further enhance the reinforcing effect of the reinforcing structural component 3 on the structural strength of the box assembly.

[0110] The statement that the first reinforcing part 310 is at least partially fixed to the bottom wall 201 means that the first reinforcing part 310 is mostly fixed to the bottom wall 201, while a small portion of the first reinforcing part 310 remains unfixed to the bottom wall 201. Of course, in some embodiments, the first reinforcing part 310 may maintain a completely fixed connection with the bottom wall 201. Similarly, the explanation of the connection relationship between the first reinforcing part 310 and the top wall 202 is similar to the above explanation and will not be repeated. The explanation of the connection between the second reinforcing part 320 and the side wall 203 is similar to the above explanation and will not be repeated.

[0111] In this embodiment, the reinforcing structural member 3 is configured as two parts, namely a first reinforcing part and a second reinforcing part. The first reinforcing part is used to fix the bottom wall or the top wall, and the second reinforcing part is used to fix the side wall. This is beneficial to strengthen the structural strength of the bottom wall, the top wall or the side wall respectively, and also to further enhance the structural strength between adjacent bottom walls, side walls and top walls, thereby further enhancing the overall anti-side collision capability of the box structure.

[0112] In some embodiments, as Figure 6 The illustration shows an embodiment where the reinforcing structural member 3 is used to strengthen the structural strength of the bottom and side walls. In other embodiments, the reinforcing structural member 3 can also be used to strengthen the structural strength of the top and side walls. This application embodiment uses... Figure 6 The following is an example illustration, such as... Figure 6 As shown, the first reinforcing part 310 is fitted to the surface of the bottom wall 201; in other embodiments, the first reinforcing part 310 may be fitted to the surface of the top wall.

[0113] It should be noted that the surface fit between the first reinforcing part 310 and the bottom wall 201 means that the contact area between the first reinforcing part 310 and the bottom wall 201 accounts for more than 80% of the surface area of ​​the first reinforcing part 310, so that the first reinforcing part 310 and the bottom wall 201 are basically in contour, which is beneficial to improving the stability of the connection between the first reinforcing part 310 and the bottom wall 201.

[0114] It can be understood that the first reinforcing part 310 is roughly set as a planar part, and the position where the bottom wall 201 is connected to the first reinforcing part 310 is roughly a planar part, so that when the first reinforcing part 310 is connected to the bottom wall 201, the two planes are in contact with each other, which is beneficial to improving the strength of the connection.

[0115] The embodiments of this application, by attaching the first reinforcing part to the surface of the bottom wall or attaching the first reinforcing part to the surface of the top wall, can improve the connection strength between the first reinforcing part and the bottom or top wall, thereby further improving the reinforcing effect of the first reinforcing part on the structural strength of the housing assembly.

[0116] In some embodiments, such as Figure 6 As shown, the second reinforcing part 320 is fitted to the surface of the side wall 203. That is, the second reinforcing part 320 is generally a planar part, and the connection between the side wall 203 and the second reinforcing part 320 is generally a planar part, so that when the second reinforcing part 320 and the side wall 203 are connected, the two planes are in contact with each other, which helps to improve the strength of the connection.

[0117] In this embodiment, by fitting the second reinforcing part to the surface of the side wall, the connection strength between the second reinforcing part and the side wall is improved, thereby further enhancing the structural strength of the housing assembly by the second reinforcing part.

[0118] In some embodiments, such as Figure 6 As shown, the first reinforcing part 310 and the second reinforcing part 320 are arranged at an angle. That is, the extending direction of the first reinforcing part 310 intersects the extending direction of the second reinforcing part 320, which makes the first reinforcing part 310 more adaptable to the extending direction of the top or bottom wall, and the second reinforcing part 320 more adaptable to the extending direction of the side wall. This helps to improve the effect of the first and second reinforcing parts in strengthening the structure of the housing assembly.

[0119] In some embodiments, such as Figure 6As shown, the connection between the first reinforcing part 310 and the second reinforcing part 320 can be achieved by a chamfered transition. In other words, the connection between the first reinforcing part 310 and the second reinforcing part 320 can be smoothly transitioned, which helps to reduce the risk of stress concentration at the connection between the first reinforcing part 310 and the second reinforcing part 320, and helps to further enhance the structural strength of the housing assembly, thereby further enhancing the anti-collision performance of the housing assembly.

[0120] In some embodiments, such as Figure 6 As shown, the included angle θ between the first reinforcing part 310 and the second reinforcing part 320 is greater than or equal to 80 degrees and less than or equal to 120 degrees.

[0121] It should be noted that the angle between the first reinforcing part 310 and the second reinforcing part 320 represents the angle between the extending direction of the surface of the first reinforcing part 310 and the extending direction of the surface of the second reinforcing part 320.

[0122] It should be noted that the included angle θ between the first reinforcing part 310 and the second reinforcing part 320 can be 90 degrees, 95 degrees, 98 degrees, 85 degrees, 110 degrees, etc. This application embodiment does not specifically limit the included angle between the first reinforcing part 310 and the second reinforcing part 320. The setting of the included angle can be determined according to the included angle between the bottom wall and the side wall or the included angle between the top wall and the side wall of the box assembly in the actual product.

[0123] This application embodiment sets the included angle between the first reinforcing part and the second reinforcing part to be greater than or equal to 80 degrees and less than or equal to 120 degrees, which is beneficial to improving the fit between the first reinforcing part and the top or bottom wall, strengthening the fit between the second reinforcing part and the side wall, and also improving the structural strength of the connection between the first reinforcing part and the second reinforcing part, thereby enhancing the overall structural strength of the housing assembly.

[0124] In some embodiments, such as Figure 6 As shown, the included angle between the first reinforcing part 310 and the second reinforcing part 320 is greater than or equal to 90 degrees and less than or equal to 100 degrees. In some embodiments, the housing assembly is formed by stamping. Therefore, a certain demolding angle is provided between the bottom wall and the side wall of the housing assembly to facilitate processing. Alternatively, a certain demolding angle is provided between the top wall and the side wall of the housing assembly to facilitate processing.

[0125] This embodiment of the application sets a certain angle between the first reinforcing part 310 and the second reinforcing part 320, and limits the angle between the first reinforcing part and the second reinforcing part to between 90 degrees and 100 degrees. This can not only improve the compatibility of the first reinforcing part and the second reinforcing part with the housing assembly, but also further enhance the structural strength performance of the first reinforcing part and the second reinforcing part on the housing assembly, thereby further enhancing the anti-collision performance of the battery device.

[0126] In some embodiments, such as Figure 4 and Figure 5 As shown, multiple reinforcing structural members 3 are provided, and these multiple reinforcing structural members 3 are spaced apart in a first direction, wherein the first direction is the length direction of the housing assembly 2. It should be noted that the number of reinforcing structural members 3 can be one or more. When there are multiple housing assemblies 2, the housing assembly 2 can be two, three, four, five, etc. The embodiments of this application do not limit the specific number of reinforcing structural members 3 provided. The specific number of reinforcing structural members provided is set according to the structural dimensions of the housing assembly. When the housing assembly is large, the side impact resistance of the housing assembly can be improved by increasing the number of reinforcing structural members.

[0127] It should be noted that the spacing of the reinforcing structural members 3 in the first direction indicates that the reinforcing structural members 3 are not continuous in the first direction. That is, there is a certain distance between adjacent reinforcing structural members, so that wiring and other components can be laid at the distance between the reinforcing structural members. It should also be noted that the embodiments of this application do not limit whether the distance between the multiple reinforcing structural members 3 is equal. That is, the distance between the multiple reinforcing structural members 3 can be flexibly set according to the specific component arrangement inside the housing assembly, so as to further improve the space utilization rate of the components in the housing assembly and improve the energy density of the entire battery device.

[0128] The embodiments of this application, by arranging reinforcing structural members at intervals along the length of the housing assembly, can increase the impact resistance of the housing assembly. Furthermore, arranging the reinforcing structures at intervals can improve the flexibility of the reinforcing structural member arrangement and further improve the energy density of the battery device.

[0129] In some embodiments, such as Figure 4-Figure 6 As shown, the housing assembly 2 also includes a protrusion 204, which is formed on the bottom wall and / or top wall, and is used to fix the reinforcing structural member 3. It should be noted that when the protrusion 204 is located on the bottom wall, as... Figure 6As shown, the protrusion 204 protrudes from the surface of the bottom wall 201. The surface of the bottom wall 201 refers to the wall surface of the bottom wall 201 near the receiving cavity 20. By providing the protrusion on the side of the bottom wall near the receiving cavity, the protrusion can be used to fix the reinforcing structural member 3. This application embodiment does not limit the specific form of fixing the protrusion to the reinforcing structural member 3. For example, the reinforcing structural member 3 can be welded or bonded to the protrusion. Regardless of the fixing method, as long as the relative position of the protrusion and the reinforcing structural member can be stabilized, it is acceptable. When the reinforcing structural member is located on the top wall, the top wall can be provided with a protrusion that protrudes from the side of the top wall near the receiving cavity.

[0130] In this embodiment, a protrusion is provided on the housing assembly. This protrusion can fix the reinforcing structural member, thereby enhancing the connection stability of the reinforcing structural member relative to the housing assembly and thus enhancing the impact resistance performance of the housing assembly.

[0131] In some embodiments, as Figure 4 As shown, the protrusion 204 is integrally stamped from the bottom wall 201, and the protrusion 204 protrudes towards the receiving cavity 20. In this embodiment, a metal sheet is placed in a punch press, and pressure is applied using a punch to stamp the sheet into a box assembly. Furthermore, the protrusion 204 can be integrally stamped using a punch, allowing it to be formed directly on the bottom wall 201 during processing. This reduces the number of processing steps on the bottom wall 201, improves the processing efficiency of the box assembly, and also enhances the structural strength of the protrusion 204.

[0132] In some embodiments, the protrusion 204 is integrally stamped from the top wall, and the protrusion 204 protrudes towards the receiving cavity 20. In this embodiment, the top wall 202 and the protrusion on the top wall are integrally stamped, which helps to improve the processing efficiency of the top wall and enhance the connection strength between the protrusion and the top wall.

[0133] In some embodiments, as Figure 6 As shown, the protrusion 204 and the sidewall 203 are spaced apart in a second direction, and the reinforcing structural member 3 abuts against the sidewall 203 and the protrusion 204 in the second direction. The second direction is the width direction of the housing assembly. The second direction is perpendicular to the first direction. The spaced interval between the protrusion 204 and the sidewall 203 indicates that there is a certain gap between them. The fact that the reinforcing structural member 3 abuts against the sidewall 203 and the protrusion 204 in the second direction indicates that the reinforcing structural member 3 is located between the sidewall 203 and the protrusion 204 in the second direction.

[0134] In this embodiment, the protrusion is fixed to the sidewall in the second direction, and the reinforcing structure abuts against the sidewall and the protrusion in the second direction. On the one hand, the protrusion 204 can support the reinforcing structure 3 in the second direction, so that the reinforcing structure 3 can apply the supporting force to the sidewall, thereby improving the overall impact resistance of the box assembly. On the other hand, the protrusion can fix the reinforcing structure. That is to say, the reinforcing structure can not only be fixed to the bottom wall, top wall or sidewall, but also to the protrusion, further enhancing the deformation resistance of the box assembly.

[0135] In some embodiments, such as Figure 6 As shown, the reinforcing structural member 3 is welded and fixed to the protrusion 204. Welding and fixing means that the reinforcing structural member 3 is connected to the protrusion 204 by means of melting material or applying pressure.

[0136] The embodiments of this application fix the reinforcing structural member and the protrusion by welding, which helps to improve the connection strength between the reinforcing structural member and the bottom or top wall, and further enhances the deformation resistance of the box assembly.

[0137] In some embodiments, such as Figure 6 As shown, the reinforcing structural member 3 is in the second direction (refer to...) Figure 6 A first end face 330 is provided at one end of the structure 3 in the left-right direction (as shown). It should be noted that the second direction refers to the width direction of the housing assembly, and the first end face 330 refers to one end face of the reinforcing structure 3 in the second direction. The extension direction of the first end face 330 intersects with the reinforcing structure 3 in the second direction. In the embodiment of this application, the first end face 330 is welded and fixed to the protrusion 204.

[0138] In this embodiment, by providing a first end face in the second direction, the connection strength between the reinforcing structural member and the protrusion is increased, thereby improving the overall structural strength of the housing assembly.

[0139] In some embodiments, such as Figure 5 As shown, there are multiple protrusions 204, which are spaced apart in the first direction. It should be noted that "multiple" means that the number of protrusions can be two, three, four, five, etc.

[0140] This application embodiment sets multiple protrusions, and the multiple protrusions are spaced apart in a first direction, which represents the length direction of the housing assembly. This helps to improve the structural strength of the housing assembly, thereby improving the side impact resistance of the battery device.

[0141] In some embodiments, such as Figure 5As shown, the number of protrusions 204 is the same as the number of reinforcing structural members 3. That is, the protrusions 204 are correspondingly provided with the reinforcing structural members 3, and each protrusion is provided with one reinforcing structural member.

[0142] This application embodiment, by setting the number of protrusions to correspond with the reinforcing structural members, helps to enhance the structural strength of the corresponding reinforcing structural members, thereby strengthening the overall structural strength of the housing assembly and improving the deformation resistance of the battery device.

[0143] In some embodiments, the housing assembly is configured as a sheet metal stamped housing. This application embodiment, by configuring the housing assembly as a sheet metal stamped housing and providing reinforcing structural members within the sheet metal stamped housing—with the reinforcing structural members located on at least one of the bottom wall, top wall, and side walls of the housing assembly—enhances the housing assembly's ability to resist impact deformation, improves its bending and torsional resistance, helps maintain housing stability during side impacts, and facilitates the absorption of impact energy during a collision, reducing the impact force transmitted to the individual battery cells.

[0144] This application also provides an electrical device including a battery device according to any of the above embodiments. The battery device includes a housing assembly, individual battery cells, and a reinforcing structural member. The housing assembly has an internal cavity and includes a bottom wall, a top wall, and side walls. The bottom wall and top wall are opposite each other, and the side walls connect to the bottom wall and top wall. The bottom wall, top wall, and side walls together form the cavity. The reinforcing structural member is disposed within the cavity and is connected to at least one of the bottom wall, top wall, and side walls. By placing the reinforcing structural member within the cavity and connecting it to at least one of the bottom wall, top wall, and side walls, this application provides that during a collision, external forces act on the housing assembly of the battery device. The reinforcing structural member strengthens the structural strength of at least one of the bottom wall, top wall, and side walls, thereby enhancing the structural strength of the housing assembly, further improving the battery device's collision resistance, reducing maintenance costs, and increasing the reliability of the related electrical equipment.

[0145] In addition to the embodiments of the claims above, specific embodiments involving more specific features or combinations thereof may be preferred and may be as shown in the accompanying drawings.

[0146] 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: A housing assembly with an internal receiving cavity; wherein the housing assembly includes a bottom wall, a top wall, and a side wall, the bottom wall and the top wall being disposed opposite each other, and the side wall connecting the bottom wall and the top wall; the bottom wall, the top wall, and the side wall together form the receiving cavity; A single battery cell, and multiple said battery cells are disposed within the receiving cavity; A reinforcing structural member is disposed within the receiving cavity, and the reinforcing structural member is connected to at least one of the bottom wall, the top wall, and the side wall.

2. The battery device according to claim 1, characterized in that, The reinforcing structural members together connect the bottom wall and the side wall; and / or, the reinforcing structural members together connect the top wall and the side wall.

3. The battery device according to claim 2, characterized in that, The reinforcing structural component includes: A first reinforcing part, which is at least partially fixedly connected to the bottom wall; or, a first reinforcing part, which is at least partially fixedly connected to the top wall; The second reinforcing part is at least partially fixedly connected to the side wall; The first reinforcing part is connected to the second reinforcing part.

4. The battery device according to claim 3, characterized in that, The first reinforcing part is fitted to the surface of the bottom wall; or, the first reinforcing part is fitted to the surface of the top wall.

5. The battery device according to claim 3, characterized in that, The second reinforcing part is fitted to the surface of the side wall.

6. The battery device according to claim 3, characterized in that, The first reinforcing part and the second reinforcing part are arranged at an angle.

7. The battery device according to claim 6, characterized in that, The angle between the first reinforcing part and the second reinforcing part is greater than or equal to 80 degrees and less than or equal to 120 degrees.

8. The battery device according to claim 6, characterized in that, The angle between the first reinforcing part and the second reinforcing part is greater than or equal to 90 degrees and less than or equal to 100 degrees.

9. The battery device according to any one of claims 1-8, characterized in that, The reinforcing structural members are configured in multiple ways, and the multiple reinforcing structural members are spaced apart in a first direction, wherein the first direction is the length direction of the box assembly.

10. The battery device according to any one of claims 1-8, characterized in that, The housing assembly further includes a protrusion formed on the bottom wall and / or the top wall, and the protrusion is used to fix the reinforcing structural member.

11. The battery device according to claim 10, characterized in that, The protrusion is integrally stamped from the bottom wall, and the protrusion is convex toward the receiving cavity; or, The protrusion is integrally stamped from the top wall, and the protrusion is oriented towards the receiving cavity.

12. The battery device according to claim 10, characterized in that, The protrusion and the sidewall are spaced apart in a second direction, and the reinforcing structural member abuts between the sidewall and the protrusion in a second direction, wherein the second direction is the width direction of the housing assembly.

13. The battery device according to claim 12, characterized in that, The reinforcing structural member is welded and fixed to the protrusion.

14. The battery device according to claim 12, characterized in that, The reinforcing structural member has a first end face at one end in the second direction, and the first end face is welded and fixed to the protrusion.

15. The battery device according to claim 10, characterized in that, The protrusions are provided in multiple portions, and the multiple protrusions are spaced apart in a first direction.

16. The battery device according to claim 15, characterized in that, The number of protrusions is the same as the number of reinforcing structural members.

17. The battery device according to claim 1, characterized in that, The enclosure assembly is configured as a sheet metal stamped enclosure.

18. An electrical appliance, characterized in that, include: The battery device according to any one of claims 1-17 is used to provide electrical energy.

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