Battery device and power utilization device

Abstract

The utility model discloses a battery device and a power utilization device, and belongs to the technical field of batteries, a mounting box comprises a box body and a box cover covering the box body, the box body comprises a main box and a mounting plate, the main box comprises a supporting body and a coating layer coating the outer surface of the supporting body, the coating layer is made of a reinforced composite material, a containing cavity is defined by the coating layer, and the mounting plate is arranged in the containing cavity; the box body is provided with an avoiding hole, the supporting body is provided with an edge beam used for bearing the box cover, the axial direction of the avoiding hole is crossed with the arrangement direction of the box body and the box cover, the avoiding hole penetrates through the edge beam in the axial direction of the avoiding hole, and the side, facing the containing cavity in the axial direction of the avoiding hole, of the avoiding hole penetrates through the coating layer; the mounting plate covers the side, deviating from the containing cavity in the axial direction of the receding hole, of the receding hole, and the mounting plate is connected with the coating layer. Space can be saved, and external functional parts can be conveniently installed.

Description

A battery device and an electrical device Technical Field

[0001] This application relates to the field of battery technology, and more particularly to a battery device and an electrical device. Background Technology

[0002] Batteries are being used more and more widely in daily life and industry. For example, new energy vehicles equipped with batteries are already widely used. In addition, batteries are increasingly being used in the field of energy storage.

[0003] The battery pack enclosure has low space utilization. Summary of the Invention

[0004] To address the aforementioned technical problems, this application provides a battery device and an electrical device to improve the utilization rate of space within the housing.

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

[0006] A first aspect of this application provides a battery device, comprising:

[0007] Battery cell;

[0008] The mounting box includes a box body and a box cover covering the box body. The box body includes a main box and a mounting plate. The main box includes a support body and a covering layer covering the outer surface of the support body. The covering layer is made of reinforced composite material and the covering layer surrounds a receiving cavity. The battery cell is located in the receiving cavity. The box body has a clearance hole. The support body has a side beam for supporting the box cover. The axial direction of the clearance hole is intersected with the arrangement direction of the box body and the box cover. The clearance hole passes through the side beam along the axial direction of the clearance hole. The clearance hole also passes through the covering layer along the axial direction of the clearance hole towards the receiving cavity. The mounting plate covers the side of the clearance hole away from the receiving cavity along the axial direction of the clearance hole. The mounting plate is connected to the covering layer.

[0009] In this embodiment, a mounting plate is disposed on the side of the clearance hole facing away from the receiving cavity along the axial direction of the clearance hole. The mounting plate is connected to the covering layer and provides mounting support for external functional components. Since the axial direction of the clearance hole is arranged intersecting the arrangement direction of the housing and the cover, and the clearance hole penetrates the side beam along the axial direction of the clearance hole, and penetrates the covering layer along the axial direction of the clearance hole towards the receiving cavity, the clearance hole provides a certain receiving space for the installation of external functional components. This reduces the space occupied by the external functional components and related installation structures on the side beam of the support body facing the receiving cavity, improves space utilization, and facilitates the installation of external functional components.

[0010] In some embodiments, the thickness of the mounting plate is 3mm to 5mm.

[0011] In this embodiment, the thickness of the mounting plate is 3mm to 5mm. On the one hand, the thickness of the mounting plate ensures that its load-bearing capacity can basically meet the installation requirements of external functional components. On the other hand, it prevents the mounting plate from being too thick, which helps to save costs.

[0012] In some embodiments, the enclosure further includes a sealing plate, the sealing plate comprising a plate body in an annular shape, the plate body surrounding the clearance hole, and the sealing plate covering the surface of the side beam facing the clearance hole radially.

[0013] In this embodiment, a ring-shaped plate surrounds the clearance hole, and a sealing plate covers the surface of the side beam of the support body facing the clearance hole radially. The sealing plate covers the side beam of the support body at the clearance hole, reducing the exposure of the side beam of the support body at the clearance hole.

[0014] In some embodiments, the sealing plate is at least partially mounted on the main housing.

[0015] In this embodiment, the sealing plate is at least partially installed on the main box. The sealing plate and the main box are two independent components. The support body and the covering layer of the main box can be manufactured first, and then the side beams that penetrate the support body and accommodate the sealing plate are processed. During the process of laying the covering layer onto the support body, the holes that penetrate the side beams and accommodate the sealing plate have not yet been formed. The shape of the side beams of the support body is relatively regular, and the laying of the covering layer is relatively convenient.

[0016] In some embodiments, the sealing plate further includes an adhesive layer located on a side of the plate body facing away from the clearance hole along the radial direction of the clearance hole, and the adhesive layer is bonded to at least the surface of the side beam facing the clearance hole along the radial direction of the clearance hole and the plate body.

[0017] In this embodiment, the adhesive layer is bonded to the side beams of the plate and the support body along the radial direction of the clearance hole, so that the plate can be easily installed into the main box in a relatively simple way.

[0018] In some embodiments, the adhesive layer spans across the side beam and the covering layer along the axial direction of the clearance hole, and the plate body spans across the portion of the adhesive layer that contacts the side beam and the portion of the adhesive layer that contacts the covering layer along the axial direction of the clearance hole.

[0019] In this embodiment, the plate spans the portion where the adhesive layer contacts the side beam and the portion where the adhesive layer contacts the covering layer along the axial direction of the clearance hole. The plate connects the side beam and the covering layer of the support body into a whole through the bonding of the adhesive layer, which helps to improve the overall rigidity of the box and gives the box a better load-bearing capacity.

[0020] In some embodiments, all surfaces of the plate body on the side of the clearance hole facing away from the clearance hole in the radial direction are in contact with the adhesive layer.

[0021] In this embodiment, all surfaces of the plate body on the side of the clearance hole that are radially away from the clearance hole are in contact with the adhesive layer, so that the plate body can be firmly bonded to the main box.

[0022] In some embodiments, the plate, the covering layer, and the mounting plate are integrally formed.

[0023] In this embodiment, the plate, the covering layer, and the mounting plate are integrally formed, which improves the overall integrity of the box and enhances its overall rigidity, giving it a better load-bearing capacity. The mounting plate can also effectively support external functional components.

[0024] In some embodiments, the plate is made of a reinforced composite material.

[0025] In this embodiment, the plate is made of reinforced composite material, which has good support strength and can better support the space of the side beam at the clearance hole.

[0026] In some embodiments, the covering layer includes:

[0027] A first coating layer surrounds the receiving cavity, and the material of the first coating layer is a reinforced composite material, wherein the reinforcing phase of the first coating layer is glass fiber;

[0028] The second cladding layer, the support body is located in the space enclosed by the first cladding layer and the second cladding layer, the material of the second cladding layer is a reinforced composite material, the reinforcing phase of the second cladding layer is carbon fiber, and the mounting plate is connected to the second cladding layer.

[0029] In this embodiment, the first coating layer forms a receiving cavity. The battery cell assembly located within the receiving cavity is close to the first coating layer and may even be in contact with it. The reinforcing phase of the first coating layer is glass fiber, which gives the first coating layer good insulation properties, thus facilitating insulation of the battery cells within the receiving cavity. The reinforcing phase of the second coating layer is carbon fiber, which gives the second coating layer high strength and helps to reduce weight.

[0030] In some embodiments, the mounting plate is made of a reinforced composite material.

[0031] In this embodiment, the mounting plate is made of reinforced composite material and has good support strength, which enables the mounting plate to provide good installation support for external functional components.

[0032] In some embodiments, the mounting plate is integrally formed with the covering layer.

[0033] In this embodiment, the mounting plate and the covering layer are integrally formed, which improves the overall integrity of the box and enhances its overall rigidity, giving it a better load-bearing capacity. The mounting plate can also effectively support external functional components.

[0034] A second aspect of this application provides an electrical device including any of the above-described battery devices, the battery device being used to store or provide electrical energy.

[0035] Beneficial effects

[0036] In the battery device of this application embodiment, the mounting plate is disposed on the side of the clearance hole away from the receiving cavity along the axial direction of the clearance hole. The mounting plate is connected to the covering layer and provides mounting support for external functional components. Since the axial direction of the clearance hole is arranged intersecting the arrangement direction of the housing and the cover, and the clearance hole penetrates the side beam along the axial direction of the clearance hole, and penetrates the covering layer along the axial direction of the clearance hole towards the receiving cavity, the clearance hole provides a certain receiving space for the installation of external functional components. This reduces the space occupied by the external functional components and related mounting structures on the side beam of the support body facing the receiving cavity, improves space utilization, and facilitates the installation of external functional components. Attached Figure Description

[0037] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0038] Figure 1 is an exploded view of the box body according to an embodiment of this application, showing the disassembled state of the covering layer, the support body and the main support;

[0039] Figure 2 is an isometric view of the box body according to an embodiment of this application;

[0040] Figure 3 is an enlarged view of position A in Figure 2;

[0041] Figure 4 is an enlarged view of position B in Figure 2;

[0042] Figure 5 is an exploded view of the box body according to an embodiment of this application, showing the disassembled state of the sealing plate and the main box;

[0043] Figure 6 is an enlarged view of position C in Figure 5;

[0044] Figure 7 is a structural schematic diagram of the box body according to an embodiment of this application, showing the cross-sectional and enlarged positions of the box body;

[0045] Figure 8 is an enlarged view of position D in Figure 7;

[0046] Figure 9 is a cross-sectional view at position HH in Figure 8;

[0047] Figure 10 is an enlarged view of position F in Figure 7;

[0048] Figure 11 is a cross-sectional view at position II in Figure 10;

[0049] Figure 12 is a cross-sectional view at position FF in Figure 7;

[0050] Figure 13 is an enlarged view of position J in Figure 12;

[0051] Figure 14 is a cross-sectional view at position GG in Figure 7;

[0052] Figure 15 is a schematic diagram of the installation box according to an embodiment of this application. The figure shows the cross-sectional structure inside the box, but the box cover is not cut.

[0053] Explanation of reference numerals in the attached figures

[0054] 100. Mounting box; 1. Box body; 11. Main box; 111. Support body; 1111. Side beam; 1112. Expansion beam; 112. Covering layer; 1121. First covering layer; 1122. Second covering layer; 113. Receiving cavity; 12. Mounting plate; 13. Clearance hole; 14. Sealing plate; 141. Plate body; 142. Adhesive layer; 15. Main support; 151. Groove; 2. Box cover. Detailed Implementation

[0055] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0056] 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, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] In related technologies, the battery pack cover is placed on the housing, the battery cells are located in the space enclosed by the cover and the housing, the housing's covering layer covers the outer surface of the support body, and external functional components are installed on the side beams of the support body. The external functional components need to pass through the covering layer and the side beams of the support body and are partially located on the side of the side beams of the support body facing the receiving cavity, occupying the space on the side of the side beams of the support body facing the receiving cavity, resulting in low space utilization of the receiving cavity.

[0063] For example, the external functional component may include a connector, the wiring portion of which occupies space on the side of the support beam facing the receiving cavity. For instance, the connector may include a connector for a battery device to connect externally for inputting or outputting electrical power. Alternatively, the connector may include a connector for a battery device to connect externally for communication or control.

[0064] For example, the external functional component may include a panel for mounting multiple connectors, with connectors that lock the panel to the housing passing through the cover and the side beam of the support and occupying the space of the side beam of the support facing the receiving cavity.

[0065] In this embodiment, a mounting plate is disposed on the side of the clearance hole facing away from the receiving cavity along the axial direction of the clearance hole, providing mounting support for external functional components. The clearance hole of the main housing penetrates the side beam, and the clearance hole penetrates the covering layer along the axial direction of the clearance hole towards the receiving cavity. The clearance hole provides arrangement space for wiring positions of external functional components facing the receiving cavity or for locking positions of external functional components facing the inner part of the receiving cavity. The wiring positions of external functional components facing the receiving cavity or the locking positions of external functional components facing the inner part of the receiving cavity can be at least partially located within the clearance hole, reducing the space occupation of the side beam facing the receiving cavity and improving space utilization.

[0066] The solutions in this application are not limited to battery devices, but can also be applied to electrical devices that include battery devices.

[0067] This application provides an electrical device, which includes a battery device, and the electrical device stores or provides electrical energy through the battery device.

[0068] In one embodiment, the electrical device further includes a device body, and a battery device is mounted on the device body to supply power to the device body.

[0069] Electrical devices are devices that use electrical energy as their energy source to perform corresponding functions by consuming electrical energy. For example, electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, space shuttles, and spacecraft, etc.

[0070] In some embodiments, the electrical device includes an aircraft.

[0071] Aircraft generally refer to machines that fly within or outside the atmosphere (space), and can include aircraft flying within the atmosphere and spacecraft flying in space. Aircraft can include airplanes, airships, etc., and for example, low-altitude aircraft, eVTOL (electric vertical take-off and landing) aircraft, commuter aircraft, regional aircraft, etc. Spacecraft can include airplanes, space shuttles, and spacecraft.

[0072] The main body of a device refers to the main structure that consumes electrical energy to perform its corresponding functions. For example, an electrical device can be a mobile phone, where the main body is the part that enables communication and other functions, powered by individual battery cells or battery packs. Similarly, an electrical device can be a car, where the main body is the part that provides seating and allows the vehicle to move on the road, powered by individual battery cells or battery packs.

[0073] In one embodiment, the battery device may be a battery pack.

[0074] In one embodiment, the battery device can be an energy storage device.

[0075] The battery device in this application embodiment includes a single battery cell. Electrical energy is stored or released through the single battery cell.

[0076] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0077] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0078] A single battery cell includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator, with the separator disposed between the negative and positive electrodes. During the charging and discharging process of the battery cell, active ions (e.g., lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, disposed between the positive and negative electrodes, prevents short circuits between the positive and negative electrodes while allowing active ions to pass through. In some embodiments, the positive electrode can 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.

[0079] As an example, the positive current collector has two surfaces opposite each other in its own thickness direction, and the positive active material is disposed on either or both of the two opposite surfaces of the positive current collector.

[0080] As an example, the positive current collector can be a metal foil, a conductive polymer material, a carbon material, or a composite current collector. For example, as a metal foil, pure metals, alloys, or surface-treated metals can be used, including but not limited to stainless steel, copper, aluminum, nickel, titanium, or silver. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector can be formed by forming a metal material (aluminum, aluminum alloys, nickel, nickel alloys, titanium, titanium alloys, silver, and silver alloys, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0081] As an example, the positive electrode active material may include at least one of the following materials: lithium phosphate, lithium transition metal oxide, and their respective modified compounds. However, this application is not limited to these materials, and other conventional materials that can be used as battery positive electrode active materials may also be used. These positive electrode active materials may be used alone or in combination of two or more. Examples of lithium phosphate may include, but are not limited to, at least one of lithium iron phosphate (such as LiFePO4 (also referred to as LFP)), lithium iron phosphate and carbon composites, lithium manganese phosphate (such as LiMnPO4), lithium manganese phosphate and carbon composites, lithium iron manganese phosphate, and lithium iron manganese phosphate and carbon composites. Examples of lithium transition metal oxide may include, but are not limited to, lithium cobalt oxide (such as LiCoO2), lithium nickel oxide (such as LiNiO2), lithium manganese oxide (such as LiMnO2, LiMn2O4), lithium nickel cobalt oxide, lithium manganese cobalt oxide, lithium nickel manganese oxide, and lithium nickel cobalt manganese oxide (such as LiNi). 1 / 3 Co 1 / 3 Mn 1 / 3 O2 (also known as NCM) 333 LiNi 0.5 Co 0.2 Mn 0.3 O2 (also known as NCM) 523 LiNi 0.5 Co 0.25 Mn 0.25 O2 (also known as NCM) 211 LiNi 0.6 Co 0.2 Mn 0.2 O2 (also known as NCM) 622 LiNi 0.8 Co 0.1 Mn 0.1 O2 (also known as NCM) 811 ), lithium nickel cobalt aluminum oxide (such as LiNi) 0.8 Co 0.15 Al 0.05 At least one of O2 and its modified compounds. Modified compounds refer to substances obtained by modification methods such as doping or coating based on the above-mentioned substances.

[0082] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0083] As an example, the negative electrode current collector can be a metal foil, a conductive polymer material, a carbon material, or a composite current collector. For example, as a metal foil, pure metals, alloys, or surface-treated metals can be used, including but not limited to stainless steel, copper, aluminum, nickel, titanium, or silver. The composite current collector may include a polymer material substrate and a metal layer. The composite current collector can be formed by forming a metal material (copper, copper alloys, nickel, nickel alloys, titanium, titanium alloys, silver, and silver alloys, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0084] 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.

[0085] As an 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.

[0086] As an example, the negative electrode active material may be a negative electrode active material known in the art for use in battery cells. 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 battery cells may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0087] In some embodiments, the negative electrode can be a foamed metal. The foamed metal can be foamed nickel, foamed copper, foamed aluminum, foamed alloy, or foamed carbon, etc. When foamed metal is used as the negative electrode sheet, the surface of the foamed metal may or may not have a negative electrode active material.

[0088] As an example, negative electrode active materials can be filled or / and deposited within the negative electrode current collector.

[0089] In some embodiments, the positive current collector can be made of aluminum, and the negative current collector can be made of copper.

[0090] In some embodiments, the electrode assembly further includes an isolator disposed between the positive and negative electrodes.

[0091] In some embodiments, the separator is a separator membrane. This application does not impose any particular limitation on the type of separator membrane; any known porous separator membrane with good chemical and mechanical stability can be selected.

[0092] As an example, the main material of the separator can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramic. The separator can be a single-layer film or a multi-layer composite film, without particular limitation. When the separator is a multi-layer composite film, the materials of each layer can be the same or different, without particular limitation. The separator can be a single component located between the positive and negative electrodes, or it can be attached to the surfaces of the positive and negative electrodes. An inorganic particle coating, an organic particle coating, or an organic / inorganic composite coating can also be applied to the surface of the separator.

[0093] In some embodiments, the separator is a solid electrolyte. The solid electrolyte is disposed between the positive and negative electrodes, serving both to transport ions and to isolate the positive and negative electrodes.

[0094] 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 impose specific limitations on the type of electrolyte; it can be selected according to requirements. The electrolyte can be liquid, gel, or solid.

[0095] Liquid electrolytes include electrolyte salts and solvents.

[0096] In some embodiments, the electrolyte salt may be selected from at least one of lithium hexafluorophosphate, lithium tetrafluoroborate, lithium perchlorate, lithium hexafluoroarsenate, lithium bis(fluorosulfonyl)imide, lithium bis(trifluoromethanesulfonyl)imide, lithium trifluoromethanesulfonate, lithium difluorophosphate, lithium difluorooxalate borate, lithium dioxalate borate, lithium difluorodioxalate phosphate, and lithium tetrafluorooxalate phosphate.

[0097] In some embodiments, the solvent may be selected from at least one of ethylene carbonate, propylene carbonate, methyl ethyl carbonate, diethyl carbonate, dimethyl carbonate, dipropyl carbonate, methyl propyl carbonate, ethyl propyl carbonate, butyl carbonate, fluoroethylene carbonate, methyl formate, methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, propyl propionate, methyl butyrate, ethyl butyrate, 1,4-butyrolactone, sulfolane, dimethyl sulfone, methyl ethyl sulfone, and diethyl sulfone. The solvent may also be an ether solvent. Ether solvents may include one or more of ethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, 1,3-dioxolane, tetrahydrofuran, methyl tetrahydrofuran, diphenyl ether, and crown ethers.

[0098] In some embodiments, the electrolyte may optionally include additives. For example, additives may include negative electrode film-forming additives, positive electrode film-forming additives, and additives that can improve certain properties of the battery cell, such as additives that improve the overcharge / fast charge performance of the battery cell, additives that improve the high-temperature performance of the battery cell, and additives that improve the low-temperature performance of the battery cell.

[0099] The gel electrolyte includes a polymer as a backbone network and can be used in conjunction with an ionic liquid-lithium salt.

[0100] Solid electrolytes include polymer solid electrolytes, inorganic solid electrolytes, and composite solid electrolytes.

[0101] As an example, the polymers of polymeric solid electrolytes may include polyethers (polyoxyethylene), polysiloxanes, polycarbonates, polyacrylonitrile, polyvinylidene fluoride, polymethyl methacrylate, monoionic polymers, polyionic liquids, cellulose, etc.

[0102] As an example, inorganic solid electrolytes can be one or more of the following: oxide solid electrolytes (crystalline perovskite, sodium superconducting ion conductor, garnet, amorphous LiPON thin film), sulfide solid electrolytes (crystalline lithium superconducting ion conductor (lithium germanium phosphorus sulfide, silver sulfide germanium ore), amorphous sulfides), halide solid electrolytes, nitride solid electrolytes, and hydride solid electrolytes.

[0103] As an example, composite solid electrolytes are formed by adding inorganic solid electrolyte fillers to polymer solid electrolytes.

[0104] The electrode assembly can be a wound structure, a stacked structure, or a hybrid structure of wound and stacked.

[0105] In some implementations, the electrode assembly is a wound structure. The positive and negative electrode sheets are wound into a wound structure.

[0106] In some implementations, the electrode assembly is a stacked structure.

[0107] As an example, multiple positive and negative electrodes can be set, and multiple positive and multiple negative electrodes can be stacked alternately.

[0108] As an example, multiple positive electrode plates can be provided, and negative electrode plates can be folded to form multiple stacked folded segments, with a positive electrode plate sandwiched between adjacent folded segments.

[0109] As an example, both the positive and negative electrode plates are folded to form multiple stacked folded segments.

[0110] As an example, multiple separators can be provided, each positioned between any adjacent positive or negative electrode plates.

[0111] As an example, the separators can be continuously arranged, either by folding or rolling between any adjacent positive or negative electrode plates.

[0112] In some embodiments, the electrode assembly can be cylindrical, flat, or polygonal, etc.

[0113] In some embodiments, the electrode assembly has tabs that allow current to be drawn from the electrode assembly. The tabs include a positive tab and a negative tab.

[0114] Please refer to Figures 1 to 4, 7 to 11, and 14 and 15 for the battery device of this application embodiment. The battery device includes a battery cell and a mounting box 100. The mounting box 100 includes a box body 1 and a box cover 2 covering the box body 1. The box body 1 includes a main box 11 and a mounting plate 12. The main box 11 includes a support body 111 and a covering layer 112 covering the outer surface of the support body 111. The material of the covering layer 112 is a reinforced composite material. The covering layer 112 surrounds a receiving cavity 113. The battery cell is located in the receiving cavity 113. The main box 11 has a clearance hole 13. The support body 111 has a side beam 1111 for supporting the box cover 2. The axial direction of the clearance hole 13 is arranged intersecting the arrangement direction of the box body 1 and the box cover 2. The clearance hole 13 passes through the side beam 1111 along the axial direction of the clearance hole 13. The clearance hole 13 passes through the covering layer 112 along the axial direction of the clearance hole 13 towards the receiving cavity 113. The mounting plate 12 covers the side of the clearance hole 13 away from the receiving cavity 113 along the axial direction of the clearance hole 13. The mounting plate 12 is connected to the covering layer 112.

[0115] The mounting box 100 is a container mainly used to hold individual battery cells. The individual battery cells are located inside the mounting box 100, which serves to protect them.

[0116] Box 1 is the main structure that carries the battery cells.

[0117] The cover 2 is a structure that covers the box body 1. The box body 1 and the cover 2 are manufactured independently and then assembled together. The cover 2 covers the box body 1, and the battery cells are located within the space enclosed by the box body 1 and the cover 2. The box body 1 and the cover 2 are manufactured independently and then assembled together, which facilitates the installation of the battery cells into the space enclosed by the box body 1 and the cover 2.

[0118] The covering layer 112 covers the outer surface of the support 111, and the support 111 is filled in the covering layer 112, providing support for the covering layer 112 to a certain extent.

[0119] Reinforced composite materials consist of a matrix phase and a reinforcing phase. The matrix phase acts as a bonder, protects the reinforcing phase, and transfers stress caused by external loads to the reinforcing phase. The reinforcing phase is mainly used for load-bearing.

[0120] For example, the matrix phase can be a metal matrix, a resin matrix, or a ceramic matrix.

[0121] For example, the resin matrix can be a thermosetting resin such as epoxy resin or polyurethane.

[0122] For example, the resin matrix can be a thermoplastic resin such as nylon or polypropylene.

[0123] For example, the reinforcing phase can have various shapes, such as fibrous, granular, or flake-like.

[0124] For example, the reinforcing phase may be carbon fiber, glass fiber, aramid fiber or basalt fiber.

[0125] For example, the reinforced composite material can be a continuous fiber reinforced composite material.

[0126] For example, the lid 2 is made of reinforced composite material.

[0127] For example, the support 111 is made of foam material.

[0128] For example, the material of the support 111 can be a thermosetting foam material such as polyurethane or epoxy.

[0129] For example, the material of the support 111 can be a thermoplastic foam material such as polyethylene terephthalate, polyphenylene ether, polypropylene, or nylon.

[0130] The main box 11 is the main structure of the box 1. The battery cells are installed in the main box 11, and the receiving cavity 113 is located in the main box 11.

[0131] Mounting plate 12 provides mounting support for the installation of external functional components.

[0132] For example, the axial direction of the clearance hole 13 is perpendicular to the arrangement direction of the housing 1 and the cover 2.

[0133] For example, the external functional component may include a connector, and the wiring position of the connector facing the receiving cavity 113 may be at least partially located within the clearance hole 13, thereby reducing the space occupied by the wiring position of the connector facing the receiving cavity 113 on the side beam 1111 of the support 111 facing the receiving cavity 113.

[0134] For example, the connector includes a connector for a battery device to connect to external wiring to input or output electrical power.

[0135] For example, the connector includes a terminal block for the battery device to connect to external wires for communication or control.

[0136] For example, the external functional component may include a panel for mounting multiple connectors, and the connectors that lock the panel to the housing 1 may be located at least partially within the clearance hole 13, reducing the space occupied by the position of the connectors locking the panel on the side beam 1111 of the support 111 facing the receiving cavity 113.

[0137] For example, the bolts for assembling the panel pass through the mounting plate 12, and the nuts that cooperate with the bolts to fasten the panel to the mounting plate 12 are located in the clearance hole 13, reducing the space occupied by the nuts on the side beam 1111 facing the receiving cavity 113.

[0138] For example, the lid 2 and the body 1 are arranged in the vertical direction.

[0139] For example, please refer to Figure 15, where the box body 1 and the box cover 2 are arranged in the direction indicated by arrow R1 in the figure.

[0140] For example, please refer to Figures 1, 2, 5, 7, 9, 11, 12 and 15. The axial direction of the clearance hole 13 is the direction indicated by arrow R2 in the figure.

[0141] In this embodiment, the mounting plate 12 covers the side of the clearance hole 13 facing away from the receiving cavity 113 along the axial direction of the clearance hole 13. The mounting plate 12 is connected to the covering layer 112, providing installation support for external functional components. Since the axial direction of the clearance hole 13 is intersected with the arrangement direction of the housing 1 and the cover 2, the clearance hole 13 penetrates the side beam 1111 along the axial direction of the clearance hole 13, and penetrates the covering layer 112 along the axial direction of the clearance hole 13 towards the receiving cavity 113. This provides a certain receiving space for the installation of external functional components, reduces the space occupied by external functional components and related installation structures on the side beam 1111 of the support body 111 facing the receiving cavity 113, improves space utilization, and facilitates the installation of external functional components.

[0142] In some embodiments, please refer to Figures 9 and 11, the thickness of the mounting plate 12 is 3mm to 5mm.

[0143] For example, the thickness of the mounting plate 12 can be 3mm, 3.2mm, 3.5mm, 3.8mm, 4mm, 4.2mm, 4.5mm, 4.8mm or 5mm.

[0144] For example, please refer to Figures 9 and 11. The thickness of the mounting plate 12 is D1, where 3mm ≤ D1 ≤ 5mm.

[0145] In this embodiment, the thickness of the mounting plate 12 is 3mm to 5mm. On the one hand, the thickness of the mounting plate 12 ensures that its load-bearing capacity can basically meet the installation requirements of external functional components. On the other hand, it prevents the mounting plate 12 from being too thick, which helps to save costs.

[0146] It is understood that the specific thickness of the mounting plate 12 is not limited. For example, the thickness of the mounting plate 12 may be less than 3 mm or greater than 5 mm, depending on the circumstances.

[0147] In some embodiments, please refer to Figures 2 to 4, and Figures 7 to 11. The housing 1 also includes a sealing plate 14. The sealing plate 14 includes a plate 141. The plate 141 is annular in shape and surrounds the clearance hole 13. The sealing plate 14 covers the surface of the side beam 1111 on the side of the clearance hole 13 facing the clearance hole 13 radially.

[0148] The sealing plate 14 is mainly used to cover the side beam 1111 of the support body 111 at the avoidance hole 13, thereby reducing the exposure of the side beam 1111 of the support body 111.

[0149] Plate 141 is the main structure of the sealing plate 14.

[0150] For example, the plate 141 is in the shape of a closed ring.

[0151] The plate 141 is in the shape of a closed ring, and the two ends of the plate 141 are connected end to end along the circumference of the clearance hole 13.

[0152] For example, the plate 141 is integrally formed at the two ends of the avoidance hole 13 along the circumferential direction.

[0153] In this embodiment of the application, a ring-shaped plate 141 surrounds the clearance hole 13, and a sealing plate 14 covers the surface of the side beam 1111 of the support body 111 facing the clearance hole 13 radially. The sealing plate 141 blocks the side beam 1111 of the support body 111 at the clearance hole 13, thereby reducing the exposure of the side beam 1111 of the support body 111 at the clearance hole 13.

[0154] It is understood that the specific structure of the battery housing 1 is not limited. For example, the housing 1 may not be provided with a sealing plate 14, and the side beams 1111 of the support body 111 and the covering layer 112 are arranged to form a clearance hole 13, and the hole wall of the clearance hole 13 is at least partially formed in the side beams 1111 of the support body 111.

[0155] In some embodiments, as shown in Figures 2 and 3, and Figures 5 through 9, the cover plate 14 is at least partially installed on the main housing 11.

[0156] The sealing plate 14 is at least partially installed on the main box 11. The sealing plate 14 and the main box 11 are two independent components. After the sealing plate 14 and the main box 11 are manufactured independently, a space is machined on the main box 11 to accommodate the sealing plate 14 and form the clearance hole 13. Then the sealing plate 14 is installed on the main box 11.

[0157] For example, a support body 111 is first formed by foaming, and then a covering layer 112 is formed on the surface of the support body 111 by molding to form the main structure of the main box 11. A hole is drilled in the main box 11 to penetrate the side beam 1111 of the support body 111 to process a space to accommodate the sealing plate 14 and form a clearance hole 13. Then the sealing plate 14 is installed in the hole processed in the main box 11.

[0158] In this embodiment, the sealing plate 14 is at least partially installed on the main box 11. The sealing plate 14 and the main box 11 are two independent components. The support body 111 and the covering layer 112 of the main box 11 can be manufactured first, and then the side beam 1111 penetrating the support body 111 and the hole for accommodating the sealing plate 14 can be processed. During the process of laying the covering layer 112 onto the support body 111, the hole for penetrating the side beam 1111 and accommodating the sealing plate 14 has not yet been formed. The shape of the side beam 1111 of the support body 111 is relatively regular, and the laying of the covering layer 112 is relatively convenient.

[0159] In some embodiments, referring to Figures 2 and 3, and Figures 5 to 9, the sealing plate 14 further includes an adhesive layer 142, which is located on the side of the plate body 141 facing away from the avoidance hole 13 along the radial direction of the avoidance hole 13. The adhesive layer 142 is bonded to at least the surface of the side beam 1111 facing the avoidance hole 13 along the radial direction of the avoidance hole 13 and the plate body 141.

[0160] The adhesive layer 142 is located on the side of the plate 141 facing away from the avoidance hole 13 along the radial direction of the avoidance hole 13, and the adhesive layer 142 is located between the plate 141 and the side beam 1111 of the support 111 along the radial direction of the avoidance hole 13.

[0161] For example, the adhesive layer 142 may be formed by solidifying a liquid adhesive.

[0162] For example, the adhesive layer 142 can be a solid adhesive.

[0163] In this embodiment, the adhesive layer 142 is bonded to the side beams 1111 of the plate 141 and the support 111 along the radial direction of the clearance hole 13, so that the plate can be easily installed into the main box 11 in a relatively simple way.

[0164] It is understood that the mounting method between the panel 141 and the main enclosure 11 is not limited. Exemplarily, the panel 141 and the main enclosure 11 can be snap-fitted together. Exemplarily, the panel 141 can be mounted to the main enclosure 11 via additional connectors.

[0165] In some embodiments, please refer to Figures 2 and 3, and Figures 5 to 9, the adhesive layer 142 spans across the side beam 1111 and the covering layer 112 along the axial direction of the clearance hole 13, and the plate body 141 spans across the portion of the adhesive layer 142 that contacts the side beam 1111 and the portion of the adhesive layer 142 that contacts the covering layer 112 along the axial direction of the clearance hole 13.

[0166] The adhesive layer 142 spans across the side beam 1111 and the covering layer 112 of the support body 111 along the axial direction of the clearance hole 13. A portion of the adhesive layer 142 along the axial direction of the clearance hole 13 is in adhesive contact with the side beam 1111 of the support body 111, and a portion of the adhesive layer 142 along the axial direction of the clearance hole 13 is in adhesive contact with the covering layer 112.

[0167] The plate 141 is spanned along the axial direction of the clearance hole 13 at the portion where the adhesive layer 142 contacts the side beam 1111 and the portion where the adhesive layer 142 contacts the covering layer 112, the portion where the adhesive layer 142 contacts the side beam 1111 of the support 111 and the portion of the plate 141 along the axial direction of the clearance hole 13 are structurally bonded, and the portion where the adhesive layer 142 contacts the covering layer 112 and the portion of the plate 141 along the axial direction of the clearance hole 13 are structurally bonded.

[0168] In this embodiment, the plate 141 spans the portion of the adhesive layer 142 that contacts the side beam 1111 and the portion of the adhesive layer 142 that contacts the covering layer 112 along the axial direction of the clearance hole 13. The plate 141 connects the side beam 1111 and the covering layer 112 of the support body 111 into a whole through the bonding of the adhesive layer 142, which is beneficial to improving the overall rigidity of the box body 1 and giving the box body 1 a better load-bearing capacity.

[0169] It is understood that the specific structure of the housing 1 is not limited. For example, the adhesive layer 142 is bonded to the side beam 1111, the adhesive layer 142 is offset from the covering layer 112, the plate 141 is bonded to the adhesive layer 142, and the plate 141 is offset from the covering layer 112.

[0170] In some embodiments, as shown in Figures 3, 6 and 9, all surfaces of the plate 141 on the side of the clearance hole 13 that are radially away from the clearance hole 13 are in contact with the adhesive layer 142.

[0171] All surfaces of the plate 141 on the side of the relief hole 13 facing away from the relief hole 13 are in contact with the adhesive layer 142, that is, the entire surface of the plate 141 on the side of the relief hole 13 facing away from the relief hole 13 is coated with adhesive.

[0172] In this embodiment, all surfaces of the plate 141 on the side of the avoidance hole 13 that are radially away from the avoidance hole 13 are in contact with the adhesive layer 142, so that the plate 141 can be firmly bonded to the main box 11.

[0173] In some embodiments, as shown in Figures 2, 4, 7, 10 and 11, the plate 141, the covering layer 112 and the mounting plate 12 are integrally formed.

[0174] The plate 141, the covering layer 112 and the mounting plate 12 are integrally formed. Since the material of the covering layer 112 is a reinforced composite material, the corresponding materials of the plate 141 and the mounting plate 12 are also reinforced composite materials.

[0175] The plate 141, the covering layer 112 and the mounting plate 12 are integrally formed, and the sealing plate 14 no longer has an adhesive layer 142.

[0176] In this embodiment, the plate 141, the covering layer 112 and the mounting plate 12 are integrally formed, the box 1 has good integrity, which is conducive to improving the overall rigidity of the box 1 and giving the box 1 good load-bearing capacity. The mounting plate 12 can better install and support external functional components.

[0177] In some embodiments, the plate 141 is made of reinforced composite material.

[0178] In this embodiment, the plate 141 is made of reinforced composite material, and the plate 141 has good support strength. The plate 141 can better support the space of the side beam 1111 at the clearance hole 13.

[0179] Understandably, the material of the plate 141 is not limited, as long as it can cover the side beam 1111 of the support body 111.

[0180] In some embodiments, the mounting plate 12 is made of reinforced composite material.

[0181] In this embodiment, the mounting plate 12 is made of reinforced composite material and has good support strength, which enables the mounting plate 12 to provide good installation support for external functional components.

[0182] Understandably, the material of the mounting plate 12 is not limited, as long as it can accommodate external functional components.

[0183] In some embodiments, as shown in Figures 2 to 6, as well as Figures 9 and 11, the mounting plate 12 and the covering layer 112 are integrally formed.

[0184] In this embodiment, the mounting plate 12 and the covering layer 112 are integrally formed, the overall integrity of the box 1 is good, which is conducive to improving the overall rigidity of the box 1 and giving the box 1 a good load-bearing capacity. The mounting plate 12 can better install and support external functional components.

[0185] It is understood that the specific structure of the mounting plate 12 and the covering layer 112 is not limited. Exemplarily, the mounting plate 12 may be bonded to the covering layer 112.

[0186] In some embodiments, referring to Figures 12 and 13, the covering layer 112 includes a first covering layer 1121 and a second covering layer 1122. The first covering layer 1121 surrounds a receiving cavity 113, and the material of the first covering layer 1121 is a reinforced composite material, with glass fiber as the reinforcing phase. The support 111 is located within the space surrounded by the first covering layer 1121 and the second covering layer 1122, and the material of the second covering layer 1122 is a reinforced composite material, with carbon fiber as the reinforcing phase. The mounting plate 12 is connected to the second covering layer 1122.

[0187] For example, the second cladding 1122 is integrally formed with the mounting plate 12, which is made of reinforced composite material and the reinforcing phase of the mounting plate 12 is carbon fiber.

[0188] For example, the second cladding 1122, the mounting plate 12, and the plate body 141 are integrally formed. The mounting plate 12 and the plate body 141 are both made of reinforced composite materials, and the reinforcing phase of the mounting plate 12 and the reinforcing phase of the plate body 141 are both carbon fibers.

[0189] In this embodiment, the first cladding layer 1121 surrounds a receiving cavity 113. The battery cell assembly located within the receiving cavity 113 is close to, and may even be in contact with, the first cladding layer 1121. The reinforcing phase of the first cladding layer 1121 is glass fiber, which gives it good insulation properties, thus facilitating insulation of the battery cells within the receiving cavity 113. The reinforcing phase of the second cladding layer 1122 is carbon fiber, which gives it high strength and helps reduce weight.

[0190] It is understood that the specific structure of the cladding layer 112 is not limited. For example, the entire cladding layer 112 is made of a reinforced composite material, such as glass fiber as the reinforcing phase or carbon fiber as the reinforcing phase.

[0191] The battery device of this application embodiment is shown in Figures 1 to 15. The battery device includes a battery cell and a mounting box 100. The mounting box 100 includes a box body 1 and a box cover 2 covering the box body 1. The box body 1 includes a main box 11 and a mounting plate 12. The main box 11 includes a support body 111 and a covering layer 112 covering the outer surface of the support body 111. The material of the covering layer 112 is a reinforced composite material. The covering layer 112 surrounds a receiving cavity 113. The battery cell is located in the receiving cavity 113. The main box 11 has a clearance hole 13. The support body 111 has a side beam 1111 for supporting the box cover 2. The axial direction of the clearance hole 13 is arranged intersecting the arrangement direction of the box body 1 and the box cover 2. The clearance hole 13 passes through the side beam 1111 along the axial direction of the clearance hole 13. The clearance hole 13 passes through the covering layer 112 along the axial direction of the clearance hole 13 towards the receiving cavity 113. The mounting plate 12 covers the side of the clearance hole 13 away from the receiving cavity 113 along the axial direction of the clearance hole 13. The mounting plate 12 is connected to the covering layer 112. The housing 1 also includes a main support 15, which is located on the side of the covering layer 112 facing the support body 111. The main support 15 is located inside the support body 111 and is located on the side of the battery cells opposite to the cover 2 along the arrangement direction of the housing 1 and the cover 2 to support the battery cells. The main support 15 is located below the battery cells. The main support 15 is plate-shaped, and grooves 151 are formed on both opposite sides of the main support 15 along the arrangement direction of the housing 1 and the cover 2. There are at least two grooves 151, which are arranged sequentially, and the grooves 151 on both sides are alternately arranged along the arrangement direction of the at least two grooves 151. The arrangement direction of the at least two grooves 151 is along the axial direction of the clearance hole 13. Part of the support body 111 is filled in the grooves 151. The main support 15 is made of metal, specifically steel or aluminum. The support body 111 is made of foam material. The support 111 can be made of thermosetting foam materials such as polyurethane or epoxy, or thermoplastic foam materials such as polyethylene terephthalate, polyphenylene ether, polypropylene, or nylon. The matrix phase can be a metal matrix, resin matrix, or ceramic matrix. The resin matrix can be a thermosetting resin such as epoxy resin or polyurethane, or thermoplastic resin such as nylon or polypropylene. The reinforcing phase has various shapes, including fibrous, granular, or sheet-like. The reinforced composite material can be a continuous fiber reinforced composite material. The reinforcing phase can be carbon fiber, glass fiber, aramid fiber, or basalt fiber. The cover 2 is made of reinforced composite material. The mounting plate 12, plate body 141, and covering layer 112 are integrally formed. The mounting plate 12 is a single-layer plate made of reinforced composite material, which facilitates the installation of external functional components.The mounting plate 12 is provided with a frame composed of a metal main support 15 in the adjacent area, a support body 111 made of foam material covering the outside of the main support 15, and a covering layer 112 covering the outer surface of the main support 15. The mounting plate 12, the plate body 141 and the covering layer 112 are integrally formed, which makes the overall rigidity of the box 1 good and the mounting plate 12 can better support the external functional components. The sealing plate 14 is at least partially installed on the main box 11. After the main box 11 is manufactured, a hole through the side beam 1111 can be opened on the main box 11 by machining to accommodate the plate body 141 forming the clearance hole 13; or, after the support body 111 is foamed and formed, the hole through the side beam 1111 and accommodating the plate body 141 can be machined first, and then the covering layer 112, the mounting plate 12 and the plate body 141 can be integrally formed by mold. After the main box 11 is manufactured, a hole is machined through the side beam 1111 in the main box 11 to accommodate the plate 141 forming the clearance hole 13. The machined hole penetrates the side beam 1111 and the portion of the covering layer 112 located on the side of the side beam 1111 facing the receiving cavity 113. The portion of the covering layer 112 located on the side of the side beam 1111 away from the receiving cavity 113 is reserved as the mounting plate 12. The plate 141 may also not be integrally formed with the covering layer 112 and the mounting plate 12. The sealing plate 14 also includes an adhesive layer 142, which is located on the side of the plate 141 facing away from the clearance hole 13 along the radial direction of the clearance hole 13. The adhesive layer 142 is bonded to at least the surface of the side beam 1111 on the side facing the clearance hole 13 along the radial direction of the clearance hole 13 and the plate 141. The support 111 also has two expansion beams 1112, with at least two battery cells sandwiched between the two expansion beams 1112, and the two expansion beams 1112 are arranged along the axial direction of the clearance hole 13.

[0192] The above embodiments are merely illustrative of the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: A battery cell; a mounting box, including a box body and a cover disposed on the box body, the box body including a main box and a mounting plate, the main box including a support body and a covering layer covering the outer surface of the support body, the covering layer being made of reinforced composite material, the covering layer forming a receiving cavity, the battery cell being located within the receiving cavity, the box body having a clearance hole, the support body having a side beam for supporting the cover, the axial direction of the clearance hole being intersected with the arrangement direction of the box body and the cover, the clearance hole penetrating the side beam along the axial direction of the clearance hole, the clearance hole penetrating the covering layer along the axial direction of the clearance hole towards the receiving cavity, the mounting plate covering the side of the clearance hole away from the receiving cavity along the axial direction of the clearance hole, the mounting plate being connected to the covering layer.

2. The battery device according to claim 1, characterized in that, The thickness of the mounting plate is 3mm to 5mm.

3. The battery device according to claim 1 or 2, characterized in that, The enclosure also includes a sealing plate, which comprises a plate body in an annular shape. The plate body surrounds the clearance hole, and the sealing plate covers the surface of the side beam facing the clearance hole radially.

4. The battery device according to claim 3, characterized in that, The sealing plate is at least partially installed in the main box.

5. The battery device according to claim 4, characterized in that, The sealing plate also includes an adhesive layer located on the side of the plate body facing away from the clearance hole along the radial direction of the clearance hole. The adhesive layer is bonded to at least the surface of the side beam facing the clearance hole along the radial direction of the clearance hole and the plate body.

6. The battery device according to claim 5, characterized in that, The adhesive layer spans across the side beam and the covering layer along the axial direction of the clearance hole, and the plate body spans across the portion of the adhesive layer that contacts the side beam and the portion of the adhesive layer that contacts the covering layer along the axial direction of the clearance hole.

7. The battery device according to claim 5, characterized in that, All surfaces of the plate body on the side of the clearance hole facing away from the clearance hole along the radial direction are in contact with the adhesive layer.

8. The battery device according to claim 3, characterized in that, The plate, the covering layer, and the mounting plate are integrally formed.

9. The battery device according to claim 3, characterized in that, The plate is made of reinforced composite material.

10. The battery device according to claim 1 or 2, characterized in that, The covering layer includes: a first covering layer, which surrounds the receiving cavity, the material of the first covering layer is a reinforced composite material, and the reinforcing phase of the first covering layer is glass fiber; a second covering layer, the support body is located in the space surrounded by the first covering layer and the second covering layer, the material of the second covering layer is a reinforced composite material, and the reinforcing phase of the second covering layer is carbon fiber, and the mounting plate is connected to the second covering layer.

11. The battery device according to claim 1 or 2, characterized in that, The mounting plate is made of reinforced composite material.

12. The battery device according to claim 1 or 2, characterized in that, The mounting plate and the covering layer are integrally formed.

13. An electrical appliance, characterized in that, Includes the battery device according to any one of claims 1 to 12, the battery device being used to store or provide electrical energy.

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