Battery device and electric equipment

Abstract

The utility model discloses a battery device and electric equipment. The battery device comprises a battery monomer, a box body and a heat exchange assembly, the box body is provided with an accommodating space for accommodating a battery monomer, the box body comprises a first wall, the first wall is the bottom wall of the box body and is used for supporting the battery monomer, and a protective layer is arranged on one side, deviating from the accommodating space, of the first wall. The heat exchange assembly is arranged between the first wall and the battery monomers and is used for carrying out heat exchange with the battery monomers. A buffer cavity is formed between the first wall and the heat exchange assembly. A first sealing piece is arranged between the first wall and the heat exchange assembly and continuously extends in the circumferential direction of the heat exchange assembly. According to the technical scheme, the overall weight of the box body of the battery device can be reduced, the manufacturing process of the box body is simplified, and the impact resistance of the battery device is improved.

Description

Technical Field

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

[0002] With the development of new energy technology, batteries are used more and more widely, such as in mobile phones, laptops, electric vehicles, electric airplanes, electric ships, electric toy cars, electric toy ships, electric tools, etc.

[0003] The development of battery technology must consider multiple design factors simultaneously. How to improve the impact resistance of battery devices and simplify the manufacturing process of battery boxes is also one of the research issues in this field. Utility Model Content

[0004] In view of the above problems, the present application provides a battery device and an electrical device, which can reduce the overall weight of the battery device housing, simplify the manufacturing process of the housing, and improve the impact resistance of the battery device.

[0005] In a first aspect, the present application provides a battery device comprising a battery cell, a housing, and a heat exchange assembly. The housing has a storage space for accommodating the battery cell, and the housing includes a first wall, which is the bottom wall of the housing and is used to support the battery cell. A protective layer is provided on the side of the first wall facing away from the storage space. The heat exchange assembly is provided between the first wall and the battery cell, and the heat exchange assembly is used to perform heat exchange with the battery cell. A buffer cavity is provided between the first wall and the heat exchange assembly. A first seal is provided between the first wall and the heat exchange assembly, and the first seal is arranged to extend continuously along the circumference of the heat exchange assembly.

[0006] In the technical solution of the embodiment of the present application, a storage space is provided in the box to provide a stable environment for the battery cells, reduce damage to the battery cells caused by external impurities, moisture, etc., and improve the stability of the battery cell operation. The first wall of the box has certain supporting properties and can provide structural support for the battery cells and related components. A protective layer is provided on the outside of the first wall to improve the impact resistance of the outer surface of the first wall and reduce damage to the box caused by objects such as stones. A heat exchange component is provided in the box to regulate the temperature of the battery cells, cool the battery cells under high temperature conditions, and reduce the risk of thermal runaway of the battery cells. The battery cells can be heated in low temperature environments to improve the operating efficiency of the battery cells. A buffer cavity is provided between the first wall and the heat exchange component to absorb external impact and improve the protection performance of the battery cells and the heat exchange component. The above structure, through the buffer cavity formed between the protective layer and the first wall, can replace the structure of the bottom guard plate on the outside of the box, thereby reducing the overall weight of the box, eliminating the manufacturing process of the bottom guard plate, simplifying the manufacturing process, and improving the impact resistance of the battery device. The first sealing member is provided between the sealing portion and the heat exchange assembly to improve the sealing performance between the heat exchange assembly and the first wall. The first sealing member extends continuously along the outer circumference of the heat exchange assembly, which can reduce sealing dead angles and gaps and further improve the sealing performance of the sealing portion.

[0007] In some embodiments, a porous support member is provided in the buffer cavity, which can improve the impact resistance of the buffer cavity and is lightweight and easy to manufacture.

[0008] In some embodiments, a groove is formed on the surface of the first wall facing the heat exchange component, the groove forming a buffer cavity, and the porous support member is disposed in the groove. The above structure improves the forming efficiency of the buffer cavity by forming the groove on the first wall.

[0009] In some embodiments, the first wall includes a panel portion, a rim portion, and a sealing portion. The panel portion is disposed opposite the heat exchange assembly and spaced apart from the heat exchange assembly. The rim portion is connected to the outer periphery of the panel portion and bends and extends toward the heat exchange assembly. The sealing portion is connected to the outer periphery of the rim portion and bends in a direction away from the heat exchange assembly. A first sealing member is disposed between the sealing portion and the heat exchange assembly. The rim portion and the panel portion together form a groove. In the above structure, the panel portion is opposite the heat exchange assembly, which can improve the protection performance of the heat exchange assembly and the battery cell. The panel portion is spaced apart from the heat exchange assembly to form a space for accommodating the porous support member. The rim portion is axially disposed around the panel portion and bends relative to it, which can enclose the side of the porous support member and reduce the risk of the porous support member moving or falling. The sealing portion is connected to the rim portion and is sealed to the heat exchange assembly, which can improve the connection stability between the first wall and the heat exchange assembly and reduce the entry of foreign matter and water seals into the groove or the accommodating space.

[0010] In some embodiments, a first fastener is further provided between the heat exchange assembly and the sealing portion. The first fastener is located on the inner side of the sealing portion facing the groove. Multiple first fasteners are provided, and the multiple first fasteners are spaced apart along the circumference of the heat exchange assembly. In the above structure, the first fasteners are provided to securely connect the first wall to the heat exchange assembly, thereby improving the strength and stability of the connection between the heat exchange assembly and the housing.

[0011] In some embodiments, the box body further includes a side wall connected to the first wall, the side wall is bent and extended from the outer periphery of the sealing portion, and the side wall and the first wall enclose a storage space. The box body further includes a reinforcing plate, the reinforcing plate is provided on the side of the side wall facing the storage space, and a buffer space is provided between the reinforcing plate and the side wall. A bent plate is connected to the edge of the reinforcing plate facing the first wall, the bent plate is bent and extended from the reinforcing plate toward the storage space, and at least part of the bent plate extends between the sealing portion and the heat exchange component. In the above structure, by providing the bent plate and the bent portion extending between the sealing portion and the heat exchange component, the connection strength is improved. By providing the reinforcing plate, the structural strength of the box body is improved. In addition, a buffer space is formed between the side wall and the reinforcement to absorb external impact on the side wall of the box body, thereby improving the protection performance of the box body against the battery cells.

[0012] In some embodiments, the housing further comprises a second seal disposed between the heat exchange assembly and the bent plate, wherein the second seal seals against the heat exchange assembly and the bent plate, respectively. In the above structure, the second seal disposed between the heat exchange assembly and the bent plate improves the sealing performance between the bent plate and the heat exchange assembly.

[0013] In some embodiments, the second sealing member further includes an extension portion extending to the outer periphery of the heat exchange assembly. The above structure further improves the sealing performance between the heat exchange assembly and the bent plate.

[0014] In a second aspect, the present application provides an electrical device, which includes the battery device in the above embodiment, and the battery device is used to provide electrical energy.

[0015] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0017] Figure 1 A schematic structural diagram of a vehicle provided in some embodiments of the present application;

[0018] Figure 2 An exploded schematic diagram of a battery device provided in some embodiments of the present application;

[0019] Figure 3 A schematic structural diagram of a battery device provided in some embodiments of the present application;

[0020] Figure 4 for Figure 3 Schematic diagram of the enlarged structure of part A;

[0021] Figure 5 for Figure 4 Schematic diagram of the enlarged structure of part B;

[0022] Figure 6 A schematic structural diagram of a battery device provided in some other embodiments of the present application;

[0023] Figure 7 for Figure 6 Schematic diagram of the enlarged structure of part C.

[0024] DETAILED DESCRIPTION OF THE REFERENCE NUMERALS

[0025] 1. Vehicle; 2. Battery device; 3. Controller; 4. Motor; 5. Box; 5a. First box portion; 5b. Second box portion; 501. First wall; 502. Protective layer; 503. Groove; 504. Porous support member; 505. Panel portion; 506. Edge portion; 507. Sealing portion; 508. First sealing member; 509. First fastener; 510. Side wall; 511. Reinforcement plate; 512. Buffer space; 513. Bending plate; 514. Second sealing member; 515. First beam; 516. Second beam; 517. Second fastener; 6. Battery cell; 7. Heat exchange assembly. DETAILED DESCRIPTION

[0026] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0028] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0029] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0030] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0031] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0032] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0033] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0034] In this application, the term "and / or" simply describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0035] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of this application, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are merely illustrative and should not constitute any limitation on this application.

[0036] The term "plurality" used in this application refers to two or more (including two).

[0037] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0038] The battery cells can be lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, etc., which are not limited in the embodiments of the present application.

[0039] A battery cell typically includes an electrode assembly. This assembly consists of a positive electrode, a negative electrode, and a separator, which is positioned between the positive and negative electrodes. During the charge and discharge process of a battery cell, active ions (such as lithium ions) are inserted and removed between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, prevents short circuits while allowing the active ions to pass through.

[0040] 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.

[0041] As an example, the positive electrode current collector has two surfaces facing each other in its thickness direction, and the positive electrode active material is provided on either or both of the two facing surfaces of the positive electrode current collector.

[0042] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0043] As an example, the negative electrode sheet may include a negative electrode current collector and a negative electrode active material disposed on at least one surface of the negative electrode current collector.

[0044] As an example, the negative electrode current collector has two surfaces facing each other in its thickness direction, and the negative electrode active material is provided on either or both of the two facing surfaces of the negative electrode current collector.

[0045] As an example, the negative electrode active material may be filled and / or deposited in the negative electrode current collector.

[0046] In some embodiments, the material of the positive electrode current collector may be aluminum, and the material of the negative electrode current collector may be copper.

[0047] In some embodiments, the electrode assembly further includes a separator disposed between the positive electrode and the negative electrode.

[0048] In some embodiments, the separator is a separator. The present application has no particular limitation on the type of separator, and any known separator with a porous structure having good chemical and mechanical stability can be selected.

[0049] In some embodiments, the separator is a solid electrolyte, which is disposed between the positive electrode and the negative electrode and serves to transport ions and isolate the positive and negative electrodes.

[0050] In some embodiments, the battery cell also includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. This application does not specifically limit the type of electrolyte, and the electrolyte can be selected based on needs. The electrolyte can be liquid, gel, or solid.

[0051] The liquid electrolyte includes an electrolyte salt and a solvent.

[0052] The electrode assembly may be a wound structure, a laminated structure, or a mixed structure of wound and laminated structures.

[0053] In some embodiments, the electrode assembly is a wound structure, wherein the positive electrode sheet and the negative electrode sheet are wound into the wound structure.

[0054] In some embodiments, the electrode assembly is a laminate structure.

[0055] As an example, multiple positive electrode sheets and multiple negative electrode sheets can be provided respectively, and the multiple positive electrode sheets and the multiple negative electrode sheets can be alternately stacked.

[0056] As an example, a plurality of positive electrode sheets may be provided, and the negative electrode sheet may be folded to form a plurality of stacked folded segments, with a positive electrode sheet being sandwiched between adjacent folded segments.

[0057] As an example, both the positive electrode sheet and the negative electrode sheet are folded to form a plurality of stacked folded segments.

[0058] As an example, a plurality of separators may be provided, each of which is disposed between any adjacent positive electrode sheets or negative electrode sheets.

[0059] As an example, the separator may be provided continuously, and may be provided between any adjacent positive electrode sheets or negative electrode sheets by folding or winding.

[0060] In some embodiments, the shape of the electrode assembly can be cylindrical, flat, or polygonal.

[0061] In some embodiments, the electrode assembly is provided with tabs that can conduct current from the electrode assembly. The tabs include a positive tab and a negative tab.

[0062] In some embodiments, a battery cell may include an outer shell. This outer shell may be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell), or an aluminum-plastic film. In some embodiments, the outer shell may be sealed or non-sealed. For example, in a non-sealed outer shell, the outer shell protects the electrode assembly and includes a sealing bag between the outer shell and the electrode assembly, which encapsulates the electrode assembly and electrolyte. Specifically, the sealing bag may be a bag-shaped insulating member or an aluminum-plastic film. In a sealed outer shell, the outer shell encapsulates the electrode assembly, electrolyte, and other components.

[0063] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, and a polygonal battery. The polygonal battery is, for example, a hexagonal battery, etc. There is no special limitation in this application.

[0064] In some embodiments, the housing includes an end cap and a shell, wherein the shell has an opening and the end cap covers the opening. The shell may have one or more openings. One or more end caps may also be provided.

[0065] In some embodiments, the housing is provided with at least one electrode terminal, which is electrically connected to the tab. The electrode terminal may be directly connected to the tab or indirectly connected to the tab via a current collecting member. The electrode terminal may be provided on an end cap or on the housing.

[0066] In a battery device, the accommodation space in the box is used to provide a stable environment for the battery cells and improve the stability of the battery cell operation. In related technologies, the bottom wall in the box is used to support the battery cells and heat exchange components. In order to improve the supporting performance of the bottom wall, a bottom guard plate is also provided on the side of the bottom wall away from the accommodation space, and the bottom guard plate is stacked with the bottom wall. The bottom plate is generally made of sheet metal stamping, and its weight ranges from a few kilograms to more than ten kilograms depending on the size of the protection area. With the increasingly higher requirements for the energy density of battery devices today, the above-mentioned bottom guard plate solution is obviously not conducive to the achievement of high energy density. At the same time, the addition of the bottom guard plate will also increase the manufacturing cost of the sheet metal box and increase the manufacturing process.

[0067] In view of this, the present application provides a battery device having a housing space within the housing to provide a stable environment for the battery cells, reduce damage to the battery cells from external impurities, moisture, etc., and improve the operational stability of the battery cells. The first wall of the housing has certain support properties, providing structural support for the battery cells and related components. A protective layer is provided on the outer side of the first wall to enhance the impact resistance of the outer surface of the first wall and reduce damage to the housing caused by impacts from objects such as stones. A heat exchange assembly is provided within the housing to regulate the temperature of the battery cells, cooling them in high-temperature conditions and reducing the risk of thermal runaway. In low-temperature conditions, the battery cells can be heated, improving their operating efficiency. A buffer cavity is provided within the first wall to absorb external impacts and enhance protection for the battery cells and the heat exchange assembly. The above structure, with the protective layer and the first wall forming a buffer cavity as a composite structure, can replace the structure of the outer bottom guard plate of the housing, thereby reducing the overall weight of the housing, eliminating the manufacturing process of the bottom guard plate, simplifying the manufacturing process, and improving the overall mass energy density of the battery device.

[0068] The battery device mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include multiple battery cells, which are connected in series, parallel, or hybrid via a busbar.

[0069] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells.

[0070] As an example, the battery cell assembly may be a battery module, which is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells with a cable tie.

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

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

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

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

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

[0076] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the bottom plate of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0077] The technical solutions described in the embodiments of the present application are applicable to various electrical devices that use battery cells, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0078] Electrical devices may include vehicles, mobile phones, portable devices, laptop computers, ships, spacecraft, electric toys, and electric tools, etc. Vehicles may include fuel vehicles, gas vehicles, or new energy vehicles. New energy vehicles may include pure electric vehicles, hybrid vehicles, or extended-range vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical devices.

[0079] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device.

[0080] Figure 1 A schematic structural diagram of a vehicle provided for some embodiments of the present application.

[0081] As shown in FIG1 , a battery device 2 is provided inside a vehicle 1 , and the battery device 2 can be provided at the bottom, head, or tail of the vehicle 1 . The battery device 2 can be used to power the vehicle 1 , for example, the battery device 2 can serve as an operating power source for the vehicle 1 .

[0082] The vehicle 1 may further include a controller 3 and a motor 4 . The controller 3 is used to control the battery device 2 to supply power to the motor 4 , for example, to meet the power requirements of starting, navigating, and driving the vehicle 1 .

[0083] In some embodiments of the present application, the battery device 2 can not only serve as the operating power source of the vehicle 1, but also serve as the driving power source of the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0084] Figure 2 Schematic diagram of the explosion of the battery provided in some embodiments of the present application. Figure 2 As shown, the battery device 2 includes a housing 5 and a battery cell 6, wherein the battery cell 6 is accommodated in the housing 5. The battery cell 6 may be the smallest unit constituting the battery.

[0085] The housing 5 is used to house the battery cells 6 and can have various structures. In some embodiments, the housing 5 can include a first housing portion 5a and a second housing portion 5b. The first housing portion 5a and the second housing portion 5b overlap each other and together define a storage space 5c for the battery cells 6. The second housing portion 5b can be a hollow structure with one end open. The first housing portion 5a is a plate-like structure, and the first housing portion 5a overlaps the open side of the second housing portion 5b to form the housing 5 with the storage space 5c. Alternatively, both the first housing portion 5a and the second housing portion 5b can be hollow structures with one end open, and the open side of the first housing portion 5a overlaps the open side of the second housing portion 5b to form the housing 5 with the storage space 5c. Of course, the first housing portion 5a and the second housing portion 5b can have various shapes, such as a cylinder, a rectangular parallelepiped, etc.

[0086] In order to improve the sealing performance after the first box body portion 5a and the second box body portion 5b are connected, a sealing member, such as a sealant, a sealing ring, etc., may also be provided between the first box body portion 5a and the second box body portion 5b.

[0087] Assuming that the first box portion 5a covers the top of the second box portion 5b, the first box portion 5a can also be called an upper box cover, and the second box portion 5b can also be called a lower box.

[0088] In the battery device 2 , there can be one or more battery cells 6 . If there are multiple battery cells 6 , the multiple battery cells 6 can be connected in series, in parallel, or in mixed connection. Mixed connection means that the multiple battery cells 6 are connected in both series and parallel.

[0089] Multiple battery cells 6 can be directly connected in series, parallel, or mixed together, and then the whole formed by multiple battery cells 6 can be accommodated in the box 5; of course, multiple battery cells 6 can also be first connected in series, parallel, or mixed together to form a battery module, and then multiple battery modules can be connected in series, parallel, or mixed together to form a whole and accommodated in the box 5.

[0090] Please refer to Figures 3 to 5 , Figure 3 This is a schematic diagram of the structure of a battery device provided in some embodiments of the present application. Figure 4 for Figure 3 The enlarged structural diagram of part A in the figure is as follows: Figure 5 for Figure 4 Schematic diagram of the enlarged structure of part B.

[0091] As shown in the figure, an embodiment of the present application provides a battery device 2, including a battery cell 6, a box body 5 and a heat exchange assembly 7. The box body 5 has a storage space for accommodating the battery cell 6, and the box body 5 includes a first wall 501. The first wall 501 is the bottom wall of the box body 5, and the first wall 501 is used to support the battery cell 6. A protective layer 502 is provided on the side of the first wall 501 facing away from the storage space. The heat exchange assembly 7 is arranged between the first wall 501 and the battery cell 6, and the heat exchange assembly 7 is used to perform heat exchange with the battery cell 6. A buffer cavity is provided between the first wall 501 and the heat exchange assembly 7. A first seal 508 is provided between the first wall 501 and the heat exchange assembly 7, and the first seal 508 is arranged to extend continuously along the circumference of the heat exchange assembly 7.

[0092] The heat exchange component 7 may be a heat exchange plate, on which a heat exchange channel for heat exchange structure flow is provided.

[0093] The protective layer 502 is used to enhance the impact resistance of the outer layer of the first wall 501. It can be made of a high-strength, high-toughness material, or can be applied or sprayed to form a coating structure on the outer surface of the first wall 501, forming a tight connection with the first wall 501. This ensures that good protection is maintained even in the face of stronger impacts and more complex environmental conditions.

[0094] For example, polyvinyl chloride (PVC), thermoplastic elastomer (TPE), thermoplastic polyurethane (TPU), polycarbonate (PC), polymethyl methacrylate (PMMA), polyurethane (PU), rubber, silicone, or nanocomposite materials such as tungsten oxide / bismuth nanoparticles can be used as the protective layer 502.

[0095] Polyvinyl chloride (PVC) is a common thermoplastic, known for its excellent physical and chemical properties and low cost. A PVC coating can be formed on the surface of first wall 501 using a spray coating process to serve as protective layer 502. PVC as protective layer 502 offers advantages such as high mechanical strength, flexibility, chemical resistance, flame retardancy, stable insulation, and processability. Therefore, as protective layer 502, it provides excellent protection for box body 5 and enhances structural stability.

[0096] Alternatively, polycarbonate (PC) is a high-performance thermoplastic with high strength, high toughness, and good impact resistance. Its impact resistance far exceeds that of ordinary glass, making it more resistant to deformation and breakage when impacted by objects such as stones. It also has excellent weather resistance, allowing for long-term use in various climates without aging. Polyamide (PA, commonly known as nylon) offers high strength, good wear resistance, and excellent chemical stability. It can resist corrosion from a variety of chemicals and effectively protect the internal structure of the housing 5 in complex environments. Reinforcement materials such as glass fiber can be added to further enhance its strength and rigidity. Polyurethane (PU) offers excellent elasticity and tear resistance, as well as a certain degree of shock absorption and cushioning. When the housing 5 is impacted by external forces, the polyurethane protective layer 502 can absorb some of the energy, reducing damage to the internal battery cells 6. Furthermore, it can be manufactured to varying degrees of hardness to meet different protection requirements. Ethylene-vinyl acetate copolymer (EVA) is soft and elastic, conforming well to the surface of the enclosure 5. It also offers excellent low-temperature resistance, maintaining its flexibility even in cold environments, providing continuous protection for the enclosure 5. Its relatively low cost helps control overall manufacturing costs. Other alternatives include engineering ceramics, such as alumina, which offer high hardness, strong wear resistance, and excellent chemical stability, resisting various acid and alkali corrosion, providing reliable protection for the enclosure 5 in extremely harsh environments.

[0097] In the technical solution of the embodiment of the present application, a accommodating space is provided in the box body 5 to provide a stable environment for the battery cell 6, reduce the damage caused to the battery cell 6 by external impurities, moisture, etc., and improve the stability of the operation of the battery cell 6. The first wall 501 of the box body 5 has a certain supporting performance and can provide structural support for the battery cell 6 and related components. A protective layer 502 is provided on the outside of the first wall 501, which can improve the impact resistance of the outer surface of the first wall 501 and reduce the damage caused to the box body 5 by the impact of objects such as stones. A heat exchange component 7 is provided in the box body 5, which can adjust the temperature of the battery cell 6, cool the battery cell 6 under high temperature conditions, and reduce the risk of thermal runaway of the battery cell 6. The battery cell 6 can be heated in a low temperature environment to improve the operating efficiency of the battery cell 6.

[0098] A buffer cavity is formed between the first wall 501 and the heat exchange assembly 7 to absorb external impact and enhance the protection of the battery cells 6 and the heat exchange assembly 7. The above structure, through the buffer cavity formed by the protective layer 502 and the first wall 501, can replace the structure of the outer bottom guard plate of the box body 5, thereby reducing the overall weight of the box body 5, eliminating the manufacturing process of the bottom guard plate, simplifying the manufacturing process, and improving the impact resistance of the battery device 2.

[0099] In some embodiments of the present application, a porous support member 504 is provided in the buffer cavity. Providing the porous support member can improve the impact resistance of the buffer cavity, and the porous support member 504 is light in weight and easy to manufacture.

[0100] The porous support member 504 can optionally be made of a variety of materials. Among polymer materials, polyurethane foam has a porous structure, good elasticity and flexibility. When impacted, it can absorb energy through its own deformation, acting as a buffer. It also has high chemical stability and adaptability to various environments. Its thermal insulation properties help maintain the temperature of the battery cells 6, improving the overall performance and reliability of the battery device 2. Polystyrene foam is lightweight and has excellent thermal insulation properties, which can assist in achieving better temperature control of the heat exchange component 7. However, its relatively low strength makes it more suitable for use in some scenarios where support strength is not a high requirement. As for metal materials, aluminum and its alloys are good choices. Aluminum has a low density and light weight, which can reduce the overall weight of the porous support member 504, thereby increasing the energy density of the battery device 2. Its strength and corrosion resistance are also good, meeting certain support and protection requirements. As a new porous metal material, aluminum foam is filled with a large number of evenly distributed pores. It combines light weight with high specific strength and good energy absorption properties, effectively absorbing external impact energy and protecting the battery cells 6. Among ceramic materials, zirconia ceramics have high strength, high hardness and good wear resistance. Its porous structure can reduce weight while ensuring a certain strength. It can also resist the erosion of some chemical substances and is suitable for battery devices with high requirements for protection and chemical stability2.

[0101] The first seal 508 itself has a certain degree of elasticity and flexibility. When it is arranged between the first wall 501 and the heat exchange component 7, it can fit tightly to the contact surface of the two. This tight fit forms a physical barrier. For example, when the first wall 501 breaks, the first seal 508 can effectively prevent external impurities, moisture and other substances from entering the interior of the box body 5 from the gap between the first wall 501 and the heat exchange component 7. The first seal 508 is arranged to extend continuously along the circumference of the heat exchange component 7, which improves the sealing integrity of the entire contact surface. There are no gaps or notches, further enhancing the effect of physical isolation. Good sealing performance can prevent moisture and impurities from entering the accommodating space 5c, avoid damage such as corrosion or short circuit of the battery cell 6, extend the service life of the battery cell 6, and improve the reliability and safety of the battery device 2.

[0102] During use, the battery device 2 may be affected by factors such as vibration and temperature fluctuations, resulting in relative displacement or stress changes between the seal portion 507 and the heat exchange assembly 7. The continuously extending first seal 508 evenly distributes these stresses, preventing stress concentration at a single point or area. This prevents damage to the seal due to excessive localized stress and maintains stable sealing performance. Furthermore, the continuously extending first seal 508 has a simple structure and is easy to install and replace, further simplifying maintenance.

[0103] In some embodiments of the present application, a groove 503 is provided on the surface of the first wall 501 facing the heat exchange assembly 7. The groove 503 forms a buffer cavity, and the porous support member 504 is disposed within the groove 503. By forming the groove 503 on the inner side of the first wall 501, a space is provided for the porous support member 504, and at the same time, a certain amount of external impact can be absorbed, thereby improving the impact resistance of the first wall 501.

[0104] like Figure 5 As shown, in some embodiments of the present application, the first wall 501 includes a panel portion 505, a peripheral portion 506, and a sealing portion 507. The panel portion 505 is disposed opposite the heat exchange assembly 7 and spaced apart from the heat exchange assembly 7. The peripheral portion 506 is connected to the outer periphery of the panel portion 505 and bends and extends toward the heat exchange assembly 7. The sealing portion 507 is connected to the outer periphery of the peripheral portion 506 and bends away from the heat exchange assembly 7. A first sealing member 508 is disposed between the sealing portion 507 and the heat exchange assembly 7. The peripheral portion 506 and the panel portion 505 together form a groove 503.

[0105] like Figure 5 As shown, the panel portion 505 is opposite to the heat exchange assembly 7, which can improve the protection performance of the heat exchange assembly 7 and the battery cell 6. The panel portion 505 and the heat exchange assembly 7 are spaced apart to form a space for accommodating the porous support member 504. The rim portion 506 is axially arranged around the panel portion 505 and bent relative to it, which can enclose the side of the porous support member 504 and reduce the risk of the porous support member 504 moving or falling. The sealing portion 507 is connected to the rim portion 506 and is sealed to the heat exchange assembly 7. When the panel portion 505 or the rim portion 506 is broken, the connection stability between the first wall 501 and the heat exchange assembly 7 can be improved, and the entry of external impurities and moisture into the accommodating space 5c through the groove 503 can be reduced.

[0106] In some embodiments of the present application, the sealing portion 507 , the peripheral portion 506 , and the panel are an integrally formed structure.

[0107] One-piece molding involves using processes such as injection molding and die-casting to precisely mold the material to the desired shape and structure of the sealing portion 507, the surrounding edge portion 506, the panel, and the groove 503. This directly yields an integrated first wall 501 with the desired shape and structure. This process enables the one-shot molding of complex shapes, meeting diverse design requirements for the first wall 501. The integrated molding structure simplifies the manufacturing process, reduces production steps and assembly time, and improves production efficiency. Furthermore, the reduced number of components and joints also reduces the defective rate.

[0108] In some embodiments of the present application, a first fastener 509 is further provided between the heat exchange component 7 and the sealing portion 507. The first fastener 509 is located on the inner side of the seal facing the groove 503. There are multiple first fasteners 509, and the multiple first fasteners 509 are arranged at circumferential intervals along the heat exchange component 7.

[0109] The first fastener 509 directly secures the first wall 501 and the heat exchange assembly 7 together, forming a relatively stable whole. During use, the battery device 2 is subject to various external forces, such as vibration and impact. The first fastener 509 can resist these external forces, preventing relative displacement or separation between the heat exchange assembly 7 and the first wall 501, thereby ensuring the integrity of the entire structure. The first fastener 509 is located on the inner side of the first seal 508 facing the groove 503, and has a certain squeezing and fixing effect on the first seal 508. By properly arranging the first fastener 509, the first seal 508 can be more tightly fitted between the heat exchange assembly 7 and the sealing portion 507, enhancing the sealing effect and further preventing external impurities and moisture from entering the storage space 5c.

[0110] Multiple first fasteners 509 are arranged at intervals along the circumference of the heat exchange component 7, and can fix the heat exchange component 7 and the first wall 501 from multiple directions, dispersing the stress at the connection and improving the connection strength. Compared with a single connection method or a small number of connection points, this multi-point fixing method can better withstand various external forces and reduce the risk of connection failure. The first fasteners 509 arranged at intervals can ensure the connection stability between the heat exchange component 7 and the first wall 501 in different directions. The manner in which multiple first fasteners 509 are arranged at intervals can gradually fix them during the installation process, and the operation is relatively flexible. At the same time, if the heat exchange component 7 or the first wall 501 needs to be maintained or replaced, some of the first fasteners 509 can also be easily removed without causing too much impact on the entire structure, reducing maintenance costs and difficulty.

[0111] Alternatively, a rivet can be used as the first fastener 509. An electric current is applied to the rivet to a high temperature (typically exceeding the material's glass transition temperature or melting point), softening or even melting the rivet head or a localized area. Under pressure, the molten rivet material penetrates the contact surface between the heat exchange component 7 and the first wall 501, forming a perforation and gradually fusing with the surrounding material. After heating is stopped, the molten material cools and solidifies, forming a strong mechanical connection and welded bond.

[0112] like Figure 6 as well as Figure 7 As shown, in some embodiments of the present application, the box body 5 also includes a side wall 510 connected to the first wall 501, and the side wall 510 is bent and extended from the outer periphery of the sealing portion 507. The side wall 510 and the first wall 501 enclose a receiving space, and the side wall 510 and the first wall 501 are integrally formed.

[0113] The side wall 510 and the first wall 501 are integrally formed, which means that they are made of the same piece of material in one go through a specific processing technology (such as stamping, casting, etc.). This design eliminates the connection gaps between the components in the traditional assembly structure, making the entire box body 5 structure more compact and continuous. The side wall 510 is bent and extended from the outer periphery of the sealing portion 507. This bending design not only increases the depth of the box body 5, thereby expanding the accommodating space, but also forms a natural transition between the side wall 510 and the first wall 501, thereby enhancing the integrity and stability of the structure. The one-piece molding design reduces the number of connection points, thereby reducing the difficulty of sealing and improving the sealing performance of the box body 5. Good sealing can effectively prevent foreign matter from entering the accommodating space and protect the safe operation of the battery cell 6.

[0114] The sidewalls 510 surround the battery cells 6 and protect them from external physical impacts such as collisions and squeezing, preventing damage to the battery cells 6. For example, if a collision occurs while the vehicle 1 is in motion, the sidewalls 510 can absorb some of the impact energy, protecting the battery cells 6 from direct impact.

[0115] In the above structure, the battery cell 6 is protected by providing the side wall 510. The side wall 510 is integrally formed with the first wall 501, which can improve the connection strength and stability between the first wall 501 and the side wall 510.

[0116] Please refer to Figure 6 as well as Figure 7 In some embodiments of the present application, the box body 5 further includes a reinforcing plate 511 , which is disposed on a side of the side wall 510 facing the accommodating space, and a buffer space 512 is provided between the reinforcing plate 511 and the side wall 510 .

[0117] The reinforcing plate 511 is a plate-like structure provided on the side of the sidewall 510 facing the storage space. It is typically made of a high-strength material such as steel or aluminum alloy. Its shape and size are designed based on the overall structure and stress conditions of the box body 5. It can partially fit in with the sidewall 510 or maintain a certain distance from it.

[0118] Optionally, a buffer material may be provided in the buffer space 512. The buffer space 512 formed between the reinforcing plate 511 and the side wall 510 is a relatively independent area, which may be filled with air or other buffer materials such as rubber, foam plastic, etc.

[0119] The reinforcing plate 511 itself has high strength and rigidity. By arranging the reinforcing plate 511 at the key stress-bearing position of the side wall 510 , the overall structural strength of the box body 5 can be effectively improved, ensuring the safety of the battery cell 6 in the box body 5 .

[0120] When an external impact is applied to the sidewall 510 of the housing 5, the sidewall 510 deforms to a certain extent. At this point, the buffer space 512 can provide cushioning and shock absorption. If the buffer space 512 is filled with cushioning material, this material will absorb and disperse the impact energy through its own deformation, reducing the impact force transmitted to the reinforcing plate 511 and the battery cell 6. Even if the buffer space 512 is filled with air, the air will be compressed during the compression and deformation of the sidewall 510, thereby dissipating some of the impact energy and providing a certain cushioning effect.

[0121] During driving, vehicle 1 may encounter various complex road conditions and collisions. The combined structure of reinforcement plate 511 and buffer space 512 can effectively absorb and disperse external impacts on housing 5, protecting battery cells 6 from damage and reducing safety risks such as thermal runaway and short circuits.

[0122] In some embodiments of the present application, a bending plate 513 is connected to the edge of the reinforcing plate 511 toward the first wall 501, and the bending plate 513 bends and extends from the reinforcing plate 511 toward the accommodating space 5c, and at least a portion of the bending plate 513 extends between the sealing portion 507 and the heat exchange component 7.

[0123] The bent plate 513 is connected to the edge of the reinforcing plate 511 facing the first wall 501. It bends and extends from the main body of the reinforcing plate 511 toward the accommodating space 5c. This bending structure creates an extended portion of the bent plate 513 with a certain angle and length in space, changing the original relatively straight edge of the reinforcing plate 511. The bent plate 513 extends between the sealing portion 507 and the heat exchange assembly 7, which is equivalent to adding an additional contact area to the original connection structure. The bent plate 513 contacts the sealing portion 507 and the heat exchange assembly 7, forming more restraint points, thereby limiting the relative movement between the components.

[0124] During use of the battery device 2, the housing 5 and its internal components are subject to various external forces, such as vibration and impact, which can cause stress concentration at the connection points. The provision of the bent plate 513 disperses the stress over a larger area, preventing stress concentration at the connection between the seal 507 and the heat exchange assembly 7. By deforming and applying force, the bent plate 513 absorbs some of the stress that might otherwise be concentrated at the connection point, thereby reducing the risk of damage due to excessive stress and improving the connection strength.

[0125] The bent plate 513 connects the reinforcing plate 511, the sealing portion 507, and the heat exchange assembly 7 into a more compact whole. The reinforcing plate 511 itself enhances the structural strength of the housing 5, while the bent plate 513 serves as a link between the reinforcing plate 511 and the other components, enabling the entire structure to function more effectively when subjected to stress. When a component is subjected to external force, the bent plate 513 transfers the force to other components, jointly resisting the external force and enhancing the structural integrity and stability of the entire housing 5.

[0126] The bent plate 513 extends between the sealing portion 507 and the heat exchange assembly 7, providing better fixation and support for the sealing portion 507 and reducing deformation and loosening of the sealing portion 507 under external forces. This helps maintain a tight fit between the sealing portion 507 and the heat exchange assembly 7, thereby improving sealing performance, preventing external impurities and moisture from entering the storage space, and protecting the safe operation of the battery cell 6. When the battery device 2 is impacted, the bent plate 513 can absorb and disperse some of the impact energy. It cushions the impact force through its own deformation, reducing damage to the connection between the sealing portion 507 and the heat exchange assembly 7, improving the impact resistance of the housing 5 and its internal components, and extending the service life of the battery device 2.

[0127] The structural design of bent plate 513 can simplify the installation process to a certain extent. It serves as a positioning and fixing component during installation, helping operators to more accurately install the sealing portion 507 and heat exchange assembly 7. Furthermore, the presence of bent plate 513 also facilitates inspection and repair of the connection points during maintenance.

[0128] In some embodiments of the present application, the housing 5 further includes a second seal 514 disposed between the heat exchange component 7 and the bending plate 513 , and the second seal 514 is sealed with the heat exchange component 7 and the bending plate 513 , respectively.

[0129] In the above structure, by providing a seal between the heat exchange assembly 7 and the bending plate 513 , the sealing performance between the bending plate 513 and the heat exchange assembly 7 is improved.

[0130] In some embodiments of the present application, the second sealing member 514 further includes an extension portion extending to the outer periphery of the heat exchange component.

[0131] For example, the extension portion can be formed by applying adhesive material between the bent plate 513 and the heat exchange component 7, or by overflowing from the gap between the heat exchange component 7 and the bent plate 513 after being squeezed. The above structure further improves the sealing performance between the heat exchange component and the bent plate.

[0132] In some embodiments of the present application, the battery device 2 further includes a frame disposed on a side of the box 5 facing away from the storage space, the frame including a first beam 515, a second beam 516, and a second fastener 517. The first beam 515 is disposed toward the side wall 510. The second beam 516 is disposed toward the sealing portion 507 and is connected to the first beam 515. The second fastener 517 passes through the second beam 516 and the sealing portion 507 and connects the first wall 501 to the frame, with multiple second fasteners 517 spaced apart along the extending direction of the sealing portion.

[0133] The frame is composed of a first beam 515, a second beam 516, and a second fastener 517. The first and second beams 515, 516 are the main structural components of the frame, providing support and connection. The second fastener 517 is a key component that connects the frame to the first wall 501 and the sealing portion 507 of the box 5. The first beam 515 is positioned toward the sidewall 510, providing support and positioning for the frame relative to the sidewall 510 of the box 5. This enhances the stability of the frame relative to the sidewall 510 of the box 5, allowing the frame to better fit the overall structure of the box 5 and helping to maintain the overall shape and structural strength of the box 5. The second beam 516 is positioned toward the sealing portion 507 and is connected to the first beam 515. The second beam 516 primarily connects to the sealing portion 507, ensuring a tight seal between the frame and the box 5. Furthermore, its connection to the first beam 515 enhances the structural integrity of the frame.

[0134] The second fastener 517 mechanically secures the second beam 516, the sealing portion 507, and the first wall 501. When the fastener is tightened, it generates axial tension, creating sufficient friction between the second beam 516 and the sealing portion 507, and between the sealing portion 507 and the first wall 501, thereby achieving a reliable connection.

[0135] For example, a rivet can be used as the second fastener 517. An electric current is applied to the rivet to a high temperature (typically exceeding the material's glass transition temperature or melting point), softening or even melting the rivet head or a localized area. Under pressure, the molten rivet material penetrates the contact surface between the heat exchange component 7 and the first wall 501, forming a perforation and gradually fusing with the surrounding material. After heating is stopped, the molten material cools and solidifies, forming a strong mechanical connection and welded bond.

[0136] In the above structure, the first beam 515 and the second beam 516 are connected to support the box 5 from the outside, thereby improving the overall structural strength of the box 5. The second fastener 517 can fix the frame to the box 5, thereby improving the connection stability between the box 5 and the frame.

[0137] In some embodiments of the present application, at least a portion of the peripheral portion 506 protrudes from a surface of the second beam 516 facing away from the sealing portion 507 , and the protruding portion is connected to the panel and forms a stepped structure with the second beam 516 .

[0138] The stepped structure formed by the protruding edge portion 506 and connected to the panel increases the structural complexity and stability of the housing 5. This structure can disperse and withstand external forces to a certain extent, making the housing 5 less susceptible to deformation or damage when subjected to external forces. For example, during transportation and installation of the battery assembly 2, it may be subjected to forces from various directions. The stepped structure can better resist these forces and protect the battery components within the housing 5.

[0139] In the above structure, the edge portion 506 is protruded from the second beam body 516 , which can increase the setting space of the groove 503 , increase the setting volume of the porous support member 504 , and improve the impact resistance of the box body 5 .

[0140] Optionally, since the edge portion 506 protrudes from the second beam 516, in the battery unit, the protruding portion of the edge portion 506 becomes a part of the structure that withstands external impact. By providing the second fastener 517, the sealing performance and structural strength are improved, and damage to the box body 5 caused by external impact is reduced.

[0141] In some optional embodiments, the battery device 2 includes a battery cell 6, a housing 5, and a heat exchange assembly 7. The housing 5 has a storage space 5c for accommodating the battery cell 6. The housing 5 includes a first wall 501, and a protective layer 502 is provided on the side of the first wall 501 facing away from the storage space. The heat exchange assembly 7 is disposed between the first wall 501 and the battery cell 6 and is used to exchange heat with the battery cell 6. A buffer cavity is provided between the first wall 501 and the heat exchange assembly 7. The first wall 501 includes a panel portion 505, a peripheral portion 506, and a sealing portion 507. The panel portion 505 is disposed opposite the heat exchange assembly 7 and spaced apart from the heat exchange assembly 7. The peripheral portion 506 is connected to the outer periphery of the panel portion 505 and bends and extends toward the heat exchange assembly 7. The sealing portion 507 is connected to the outer periphery of the peripheral portion 506, bends away from the storage space, is disposed opposite the heat exchange assembly 7, and is sealed to the heat exchange assembly 7. The edge portion 506 and the panel portion 505 together form a groove 503. A porous support member 504 is provided in the groove 503. A first fastener 509 is also provided between the heat exchange component 7 and the sealing portion 507. The number of the first fasteners 509 is multiple, and the multiple first fasteners 509 are arranged at intervals along the circumference of the heat exchange component 7. The box body 5 also includes a side wall 510 connected to the first wall 501. The side wall 510 is bent and extended from the outer periphery of the sealing portion 507. The side wall 510 and the first wall 501 together form a storage space. The box body 5 also includes a reinforcing plate 511. The reinforcing plate 511 is provided on the side of the side wall 510 facing the storage space. A buffer space 512 is provided between the reinforcing plate 511 and the side wall 510. A bent plate 513 is connected to the edge of the reinforcing plate 511 facing the first wall 501. The bent plate 513 bends and extends from the reinforcing plate 511 toward the accommodating space, with at least a portion of the bent plate 513 extending between the sealing portion 507 and the heat exchange assembly 7. The housing 5 also includes a second seal 514 disposed between the heat exchange assembly 7 and the bent plate 513, and the second seal 514 seals against the heat exchange assembly 7 and the bent plate 513, respectively.

[0142] The present application also provides an electrical device comprising the battery device 2 of the aforementioned embodiment, which is configured to provide electrical energy. In the battery device 2, a housing 5 is provided with a storage space to provide a stable environment for the battery cells 6, reducing damage to the battery cells 6 from external impurities, moisture, and the like, thereby improving the operational stability of the battery cells 6. The first wall 501 of the housing 5 has a certain degree of support, providing structural support for the battery cells 6 and related components. A protective layer 502 is provided on the outer surface of the first wall 501 to enhance the impact resistance of the outer surface of the first wall 501 and reduce damage to the housing 5 caused by impacts from objects such as stones. A heat exchange assembly 7 is provided within the housing 5 to regulate the temperature of the battery cells 6, cooling them in high temperatures to reduce the risk of thermal runaway. In low temperatures, the battery cells 6 can be heated to improve their operational efficiency. A buffer chamber is provided between the first wall 501 and the heat exchange assembly 7 to absorb external impacts and enhance protection for the battery cells 6 and the heat exchange assembly 7. The above structure, through the protective layer 502 and the buffer cavity inside the first wall 501, can replace the structure of the bottom guard plate outside the box body 5, thereby reducing the overall weight of the box body 5, eliminating the manufacturing process of the bottom guard plate, simplifying the manufacturing process, and improving the overall impact resistance of the battery device 2.

[0143] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and components may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features described in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions within the scope of the claims.

Claims

1. A battery device, characterized in that: include: Battery cells; A box body having a storage space for accommodating the battery cell, the box body including a first wall, the first wall being a bottom wall of the box body, the first wall being used to support the battery cell, and a protective layer being provided on a side of the first wall facing away from the storage space; a heat exchange component, disposed between the first wall and the battery cell, the heat exchange component being used to perform heat exchange with the battery cell; A buffer cavity is provided between the first wall and the heat exchange component, and a first sealing member is provided between the first wall and the heat exchange component. The first sealing member is continuously extended along the circumference of the heat exchange component.

2. The battery device according to claim 1, wherein: A porous support member is provided in the buffer cavity.

3. The battery device according to claim 2, characterized in that A groove is provided on the surface of the first wall facing the heat exchange component, the groove forms the buffer cavity, and the porous support member is arranged in the groove.

4. The battery device according to claim 3, characterized in that The first wall comprises: A panel portion is arranged opposite to the heat exchange component and spaced apart from the heat exchange component; A peripheral portion connected to the outer periphery of the panel portion and bent and extended toward the heat exchange component; The sealing portion is connected to the outer periphery of the surrounding edge portion and is bent in a direction away from the heat exchange component. The first sealing member is provided between the sealing portion and the heat exchange component. The edge portion and the panel portion enclose and form the groove.

5. The battery device according to claim 4, characterized in that A first fastener is further provided between the heat exchange component and the sealing portion. The first fastener is located on the inner side of the first sealing component facing the groove. There are multiple first fasteners, and the multiple first fasteners are arranged at intervals along the circumference of the heat exchange component.

6. The battery device according to claim 4, characterized in that The box body further includes a side wall connected to the first wall, the side wall is bent and extended from the outer periphery of the sealing portion, and the side wall and the first wall enclose the accommodating space. The box body further includes a reinforcing plate, which is arranged on a side of the side wall facing the accommodation space, and a buffer space is provided between the reinforcing plate and the side wall. A bent plate is connected to the edge of the reinforcing plate facing the first wall. The bent plate bends and extends from the reinforcing plate toward the accommodating space, and at least a portion of the bent plate extends between the sealing portion and the heat exchange component.

7. The battery device according to claim 6, characterized in that The box body further includes a second sealing member disposed between the heat exchange component and the bending plate, and the second sealing member is sealed and matched with the heat exchange component and the bending plate respectively.

8. The battery device according to claim 7, characterized in that The second sealing member further includes an extension portion extending to the outer periphery of the heat exchange component.

9. An electrical device, characterized in that: The electrical device comprises the battery device according to any one of claims 1 to 8, and the battery device is used to provide electrical energy.

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