Box body assembly, battery device and electric equipment

Abstract

The embodiment of the utility model provides a box body assembly, a battery device and electric equipment. The battery device comprises a box body assembly and a battery monomer assembly, wherein the box body assembly is used for accommodating the battery monomer assembly; the box body assembly comprises a fiber one-way strip-metal structure. The fiber one-way strip-metal structure comprises a metal piece and a continuous fiber one-way strip. And the continuous fiber one-way strip is coated on the surface of the metal piece. The continuous fiber unidirectional strip comprises continuous fibers and a matrix, and the matrix is attached to the continuous fibers. According to the battery device provided by the embodiment of the invention, the fiber one-way strip-metal structure of the box body assembly is arranged to comprise the metal piece and the continuous fiber one-way strip, so that the production efficiency is high, continuous and uninterrupted production can be carried out, the production efficiency of the fiber-metal structure is improved, the metal piece is coated with the continuous fiber one-way strip, and the production efficiency of the battery device is improved. The fiber one-way strip-metal structure can have good insulation performance and structural strength, and therefore the structural strength, the insulation performance and the production efficiency of the box body assembly can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and particularly to a box assembly, a battery device, and an electrical device. Background Art

[0002] This section aims to provide background or context for the embodiments of the present application. The descriptions herein are not admitted to be prior art by including them in this section.

[0003] In new energy vehicles equipped with batteries, the batteries can be used to provide power in whole or in part. During the use of the batteries, the batteries need to have high reliability. Among them, the box assembly that plays a protective role for the battery cells inside the battery needs to have high structural strength and insulation performance. Therefore, how to provide a box assembly with high structural strength and good insulation has become an important research direction in this field. Summary of the Utility Model

[0004] In view of this, the embodiments of the present application are expected to provide a box assembly, a battery device, and an electrical device, which can improve the structural strength, insulation, and production efficiency of the box assembly to a certain extent.

[0005] To achieve the above object, the first aspect of the embodiments of the present application provides a battery device, including:

[0006] A battery cell assembly;

[0007] A box assembly for accommodating the battery cell assembly;

[0008] Wherein, the box assembly includes a fiber unidirectional tape - metal structure, and the fiber unidirectional tape - metal structure includes:

[0009] A metal part;

[0010] A continuous fiber unidirectional tape, and the continuous fiber unidirectional tape is coated on the surface of the metal part;

[0011] The continuous fiber unidirectional tape includes continuous fibers and a matrix, and the matrix adheres to the continuous fibers.

[0012] The battery device provided by the embodiment of the present application includes a box body assembly and a battery cell assembly. The battery cell assembly is disposed in the accommodation cavity of the box body assembly, and the box body assembly plays a protective role for the battery cell assembly. On the one hand, by setting the fiber unidirectional tape-metal structure of the box body assembly to include a metal part and a continuous fiber unidirectional tape, the continuous fiber unidirectional tape has the advantages of high strength, few burrs, and high production efficiency. In addition, by using continuous fibers, it is not necessary to cut the continuous fibers and then attach the matrix to the continuous fibers to obtain the fiber unidirectional tape during the production process, so continuous and uninterrupted production can be carried out, further improving the production efficiency of the fiber unidirectional tape-metal structure. On the other hand, by covering the metal part with the continuous fiber unidirectional tape, the fiber unidirectional tape-metal structure can have better insulation performance and structural strength.

[0013] In some embodiments, the fiber unidirectional tape-metal structure further includes an adhesive layer, and the adhesive layer is disposed between the metal part and the continuous fiber unidirectional tape.

[0014] In this embodiment, before covering the continuous fiber unidirectional tape on the metal part, an adhesive layer is disposed on the surface of the metal part. That is, by disposing an adhesive layer between the continuous fiber unidirectional tape and the metal part, the bonding effect between the continuous fiber unidirectional tape and the metal part can be improved.

[0015] In some embodiments, the surface of the metal part is provided with a concavo-convex structure.

[0016] In this embodiment, by providing a concavo-convex structure on the surface of the metal part, the adhesion between the thermoplastic resin and the metal part is further improved, thereby further improving the production efficiency and structural strength of the fiber unidirectional tape-metal structure.

[0017] In some embodiments, the width of the metal part is smaller than the width of the continuous fiber unidirectional tape.

[0018] In this embodiment, by setting the width of the metal part to be smaller than the width of the continuous fiber unidirectional tape, the continuous fiber unidirectional tape can completely cover the metal part, that is, the entire outer surface of the metal part can be covered. Thus, while ensuring the insulation of the fiber unidirectional tape-metal structure, the structural strength of the fiber unidirectional tape-metal structure can be improved.

[0019] In some embodiments, the matrix includes polypropylene, nylon 6, or nylon 66.

[0020] Here, the matrix can be made of polypropylene (PP) resin, nylon 6 (PA6, Polyamide 6) resin, or nylon 66 (polyhexamethylene adipamide, PA66, Nylon-66) resin. That is, polypropylene (PP) resin, nylon 6 (PA6, Polyamide 6) resin, or nylon 66 (polyhexamethylene adipamide, PA66, Nylon-66) resin can be attached to continuous fibers to form continuous fiber unidirectional tapes.

[0021] In some embodiments, a polar additive is added to the matrix.

[0022] In this embodiment, by adding a polar additive to the matrix and then infiltrating the unrolled continuous fibers through the matrix, that is, attaching the matrix to the continuous fibers to form continuous fiber unidirectional tapes. In this way, the adhesion between the continuous fiber unidirectional tapes and the metal parts can be increased, which is beneficial to improving the structural strength of the fiber unidirectional tape-metal structure.

[0023] In some embodiments, the polar additive includes maleic anhydride grafted ethylene-octene copolymer or polyethylene-grafted maleic anhydride.

[0024] In some embodiments, the continuous fibers are continuous glass fibers.

[0025] In this embodiment, by setting the continuous fibers to be composed of continuous glass fiber bundles, the continuous glass fiber bundles are infiltrated through the matrix, that is, attaching the matrix to the continuous fibers to form continuous glass fiber unidirectional tapes, and continuously extruded and adhered to the surface of the metal parts to achieve the composite between the continuous glass fibers and the metal parts, obtaining a fiber unidirectional tape-metal structure. The fiber unidirectional tape-metal structure has high structural strength and good insulation performance.

[0026] In some embodiments, both sides of the metal part in the thickness direction are coated with the continuous fiber unidirectional tapes.

[0027] In this embodiment, by coating both sides of the metal part in the thickness direction with continuous fiber unidirectional tapes, it is beneficial to further improve the structural strength of the fiber unidirectional tape-metal structure, thereby further improving the structural strength of the box assembly.

[0028] In some embodiments, multiple layers of the continuous fiber unidirectional tapes arranged in a stacked manner are coated on the same side of the metal part in the thickness direction.

[0029] In this embodiment, by wrapping the metal part with multiple layers of continuously fiber unidirectional tapes stacked on the same side in the thickness direction, it is beneficial to further improve the structural strength of the fiber unidirectional tape - metal structure, thereby further improving the structural strength of the box assembly.

[0030] In some embodiments, among the continuously fiber unidirectional tapes on the same side of the metal part in the thickness direction, at least one of the continuously fiber unidirectional tapes has an extension direction different from that of the other continuously fiber unidirectional tapes.

[0031] In this embodiment, among the continuously fiber unidirectional tapes on the same side of the metal part in the thickness direction, at least one of the continuously fiber unidirectional tapes is arranged to have an extension direction different from that of the other continuously fiber unidirectional tapes, which is beneficial to improving the strength performance of the fiber unidirectional tape - metal structure in different directions, thereby further improving the structural strength of the fiber unidirectional tape - metal structure, and further improving the structural strength of the box assembly.

[0032] In some embodiments, the box assembly includes a box body, the box body includes a top cover, a frame and a bottom plate, the top cover and the bottom plate are respectively connected to the frame, and at least one of the top cover, the frame and the bottom plate is the fiber unidirectional tape - metal structure.

[0033] It is beneficial to improve the structural strength, insulation performance, and production efficiency of the top cover, the frame, and / or the bottom plate.

[0034] In some embodiments, the box assembly further includes a collision - proof structure, the collision - proof structure is arranged at one end of the box body, and at least part of the collision - proof structure protrudes from the outer surface of the box body, wherein the collision - proof structure is the fiber unidirectional tape - metal structure.

[0035] In this embodiment, the box assembly is provided with a collision - proof structure so that when the box assembly is impacted, it can first contact the collision - proof structure, thereby playing a certain protective role for the box body and improving the impact - resistance performance of the box assembly; in addition, by setting the collision - proof structure as the fiber unidirectional tape - metal structure, it is beneficial to further improve the structural strength, insulation performance, and production efficiency of the collision - proof structure.

[0036] In some embodiments, the box assembly further includes a connecting beam, the connecting beam is arranged inside the box body and defines a receiving cavity with the box body, and the battery cell assembly is arranged in the receiving cavity, wherein the connecting beam is the fiber unidirectional tape - metal structure.

[0037] In this embodiment, the box body assembly is provided with a connecting beam. The connecting beam and the box body define a receiving cavity, and the battery cells are arranged in the receiving cavity. When the battery cells expand laterally, the box body and / or the connecting beam can support the battery cells, improving the anti-expansion ability of the battery cells and solving the problem of battery cell failure due to expansion force. In addition, by setting the connecting beam as a fiber unidirectional tape-metal structure, it is beneficial to further improve the structural strength, insulation performance, and production efficiency of the connecting beam.

[0038] In the second aspect of the embodiments of the present application, a box body assembly is provided. The box body assembly is the box body assembly of the battery device described above, and the box body assembly is used to accommodate the battery cell assembly.

[0039] For the box body assembly provided in the embodiments of the present application, the box body assembly is used to accommodate the battery cell assembly, and the box body assembly plays a protective role for the battery cell assembly. On the one hand, by setting the fiber unidirectional tape-metal structure of the box body assembly to include a metal part and a continuous fiber unidirectional tape, the continuous fiber unidirectional tape has the advantages of high strength, few burrs, and high production efficiency. In addition, by using continuous fibers, it is not necessary to cut the continuous fibers and then attach the matrix to the continuous fibers to obtain the fiber unidirectional tape during the production process, so continuous and uninterrupted production can be carried out, further improving the production efficiency of the fiber unidirectional tape-metal structure. On the other hand, by covering the continuous fiber unidirectional tape on the metal part, the fiber unidirectional tape-metal structure can have good insulation performance and structural strength.

[0040] In the third aspect of the embodiments of the present application, an electrical device is provided, including the battery device described above, and the battery device is used to provide electrical energy.

[0041] For the battery device of the electrical device provided in the embodiments of the present application, it includes a box body assembly and a battery cell assembly. The battery cell assembly is arranged in the receiving cavity of the box body assembly, and the box body assembly plays a protective role for the battery cell assembly. On the one hand, by setting the fiber unidirectional tape-metal structure of the box body assembly to include a metal part and a continuous fiber unidirectional tape, the continuous fiber unidirectional tape has the advantages of high strength, few burrs, and high production efficiency. In addition, by using continuous fibers, it is not necessary to cut the continuous fibers and then attach the matrix to the continuous fibers to obtain the fiber unidirectional tape during the production process, so continuous and uninterrupted production can be carried out, further improving the production efficiency of the fiber unidirectional tape-metal structure. On the other hand, by covering the continuous fiber unidirectional tape on the metal part, the fiber unidirectional tape-metal structure can have good insulation performance and structural strength. Description of the Drawings

[0042] Figure 1 It is a schematic structural diagram of a vehicle provided by the embodiments of the present application;

[0043] Figure 2 Schematic structural diagram of the battery provided by the embodiment of the present application;

[0044] Figure 3 Schematic diagram of a fiber unidirectional tape - metal structure provided by the embodiment of the present application;

[0045] Figure 4 Schematic diagram of another fiber unidirectional tape - metal structure provided by the embodiment of the present application.

[0046] Description of reference numerals

[0047] 10. Battery cell assembly; 21. Box body; 211. First box body part; 212. Second box body part; 22. Fiber unidirectional tape - metal structure; 221. Metal part; 222. Continuous fiber unidirectional tape; 100. Battery device; 200. Controller; 300. Motor; 1000. Vehicle. Detailed implementation manners

[0048] It should be noted that, without conflict, the embodiments in the present application and the technical features in the embodiments can be combined with each other. The detailed description in the detailed implementation manners should be understood as an explanatory illustration of the purpose of the present application and should not be regarded as an improper limitation to the present application.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "including" and "having" and any variations thereof in the present application are intended to cover non - exclusive inclusion.

[0050] In the description of the embodiments of the present application, technical terms such as "first", "second", "third", etc. are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary - secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is more than two, unless otherwise specifically defined.

[0051] Referring to "embodiments" herein means that the specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appears at various positions in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0052] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0053] In the description of the embodiments of the present application, the orientation or position relationship indicated by technical terms such as "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "circumferential", "height direction", "first direction", and "second direction" are based on the orientation or position relationship shown in the accompanying drawings. They 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 referred device or element must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0054] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0055] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and may be direct contact or contact through an intermediate medium layer. It may be contact with essentially no interaction force between the two contacting parties, or it may be contact with interaction force between the two contacting parties.

[0056] With the development of clean energy, more and more devices use electric energy as driving energy, and then power batteries that can store more electric energy and can be charged and discharged repeatedly are developing rapidly, such as lithium-ion batteries. Among them, power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as aerospace and other fields.

[0057] The battery apparatus 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 a plurality of battery cells, and the plurality of battery cells are connected in series, parallel or in a hybrid connection through a busbar component.

[0058] In some embodiments, the battery cell assembly is generally formed by arranging a plurality of battery cells; as an example, the battery cell assembly may be a battery module, and the battery module is formed by arranging and fixing a plurality of battery cells into an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells with cable ties.

[0059] In some embodiments, the battery apparatus may be a battery pack, and the battery pack includes a box body component and one or more battery cell assemblies, and the battery cell assemblies are accommodated in the box body component.

[0060] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box body component by fixing the battery module in the box body component.

[0061] As an example, the battery cell assembly may also be accommodated in the box body component by directly fixing a plurality of battery cells to the box body component.

[0062] The battery cell includes an electrode assembly and an electrolyte. The electrode assembly is composed of a positive electrode sheet, a negative electrode sheet and a separator. The battery cell mainly works by the movement of metal ions between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer, and the positive electrode active material layer is coated on the surface of the positive electrode current collector. The positive electrode current collector without the coated positive electrode active material layer protrudes from the positive electrode current collector with the coated positive electrode active material layer, and the positive electrode current collector without the coated positive electrode active material layer serves as the positive electrode tab. Taking a lithium-ion battery as an example, the material of the positive electrode current collector may be aluminum, and the positive electrode active material may be lithium cobaltate, lithium iron phosphate, ternary lithium or lithium manganate, etc. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer, and the negative electrode active material layer is coated on the surface of the negative electrode current collector. The negative electrode current collector without the coated negative electrode active material layer protrudes from the negative electrode current collector with the coated negative electrode active material layer, and the negative electrode current collector without the coated negative electrode active material layer serves as the negative electrode tab. The material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon or silicon, etc. In order to ensure that a large current can pass through without fusing, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together. The material of the separator may be PP (polypropylene) or PE (polyethylene), etc.

[0063] Exemplarily, the positive current collector has two surfaces opposite to 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.

[0064] Exemplarily, the positive current collector can be a metal foil or a composite current collector. For example, as the metal foil, aluminum with silver plating on the surface, stainless steel with silver plating on the surface, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc. can be used. The composite current collector can include a polymer material base layer and a metal layer. The composite current collector can be formed by forming a metal material (such as aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0065] Exemplarily, the negative electrode can be a negative electrode sheet, and the negative electrode sheet can include a negative current collector.

[0066] Exemplarily, the negative current collector can be a metal foil or a composite current collector. For example, as the metal foil, aluminum with silver plating on the surface, stainless steel with silver plating on the surface, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc. can be used.

[0067] Exemplarily, the negative current collector has two surfaces opposite to each other in its own thickness direction, and the negative active material is disposed on either or both of the two opposite surfaces of the negative current collector.

[0068] Exemplarily, the negative active material can be a negative active material for a battery well-known in the art. As an example, the negative active material can include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based material, tin-based material, and lithium titanate, etc. The silicon-based material can be selected from at least one of elemental silicon, silicon oxide compound, silicon-carbon composite, silicon-nitrogen composite, and silicon alloy. The tin-based material can be selected from at least one of elemental tin, tin oxide compound, and tin alloy. However, the present application is not limited to these materials, and other conventional materials that can be used as the negative active material of the battery can also be used. These negative active materials can be used alone or in combination of two or more.

[0069] The battery cell further includes an insulating film and a housing. The insulating film is coated on the outside of the electrode assembly, and the housing encapsulates the electrode assembly coated with the insulating film to form a battery cell. The insulating film can be a mylar film, and the housing can be an aluminum shell or a steel shell. After the electrode assembly is wound and formed, the encapsulation of the mylar film and the housing is completed through the mylar wrapping process and the housing insertion process. Among them, the mylar film plays a role in sealing and protecting the electrode assembly, and the mylar film can effectively insulate the electrode assembly and the housing from each other to avoid internal short circuit of the battery cell. The housing plays a protective role.

[0070] Exemplarily, the outer casing includes a top cover and a housing. The housing is provided with an opening, and the top cover closes the opening to form a sealed space for accommodating substances such as an electrode assembly and an electrolyte. The housing may be provided with one or more openings. The top cover may also be provided with one or more openings.

[0071] Exemplarily, at least one electrode terminal is provided on the outer casing, and the electrode terminal is electrically connected to the tab of the electrode assembly. The electrode terminal may be directly connected to the tab or indirectly connected to the tab through an adapter. The electrode terminal may be provided on the top cover or on the housing.

[0072] Exemplarily, a pressure relief valve is provided on the outer casing. The pressure relief valve is used to release the internal pressure of the battery cell.

[0073] The development of battery technology needs to consider various design factors simultaneously. For example, performance parameters such as energy density, discharge capacity, charge-discharge rate, etc. In addition, the reliability of the battery device also needs to be considered.

[0074] In many application scenarios, when a vehicle collides during driving, the impact resistance of the battery box assembly is poor, there is a risk of failure, and it cannot meet the airtight requirements of the battery device. The box assembly that protects the battery cells inside the battery needs to have high structural strength and insulation performance. Therefore, how to provide a box assembly with high structural strength and good insulation has become an important research direction in this field.

[0075] In view of this, in order to improve the structural strength, insulation performance and production efficiency, the embodiment of the present application provides a battery device. The battery device includes a box assembly and a battery cell assembly. The box assembly is used to accommodate the battery cell assembly. The box assembly includes a fiber unidirectional tape-metal structure. The fiber unidirectional tape-metal structure includes a metal part and a continuous fiber unidirectional tape. The continuous fiber unidirectional tape is coated on the surface of the metal part. The continuous fiber unidirectional tape includes continuous fibers and a matrix, and the matrix adheres to the continuous fibers.

[0076] The battery device provided by the embodiment of the present application includes a box body assembly and a battery cell assembly. The battery cell assembly is arranged in the accommodation cavity of the box body assembly, and the box body assembly plays a protective role for the battery cell assembly. On the one hand, by setting the fiber unidirectional tape-metal structure of the box body assembly to include a metal part and a continuous fiber unidirectional tape, the continuous fiber unidirectional tape has the advantages of high strength, few burrs, and high production efficiency. In addition, by using continuous fibers, it is not necessary to cut the continuous fibers and then attach the matrix to the continuous fibers to obtain the fiber unidirectional tape during production, so continuous and uninterrupted production can be carried out, further improving the production efficiency of the fiber unidirectional tape-metal structure. On the other hand, by wrapping the continuous fiber unidirectional tape on the metal part, the fiber unidirectional tape-metal structure can have good insulation performance and structural strength.

[0077] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using battery cells and battery devices. For example, mobile phones, portable devices, laptop computers, battery cars, electric toys, electric tools, vehicles, ships, and spacecrafts, etc. For example, spacecrafts include airplanes, rockets, space shuttles, and spaceships, etc.

[0078] Please refer to Figure 1 , inside the vehicle 1000, a controller 200, a motor 300, and a battery device 100 can be arranged. The controller 200 is used to control the battery device 100 to supply power to the motor 300. For example, the battery device 100 can be arranged at the bottom, the front end, or the rear end of the vehicle 1000. The battery device 100 can be used for the power supply of the vehicle 1000. For example, the battery device 100 can be used as the operating power source of the vehicle 1000 and used for the circuit system of the vehicle 1000, such as the working power requirements for the start, navigation, and operation of the vehicle 1000. In another embodiment of the present application, the battery device 100 can not only be used as the operating power source of the vehicle 1000, but also be used as the driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0079] The embodiment of the present application provides a battery device. Please refer to Figures 2 to 4 , the battery device 100 includes a box body assembly and a battery cell assembly 10. The box body assembly is used to accommodate the battery cell assembly 10. The box body assembly includes a fiber unidirectional tape-metal structure 22. The fiber unidirectional tape-metal structure 22 includes a metal part 221 and a continuous fiber unidirectional tape 222. The continuous fiber unidirectional tape 222 is wrapped on the surface of the metal part 221. The continuous fiber unidirectional tape 222 includes continuous fibers and a matrix, and the matrix is attached to the continuous fibers.

[0080] The battery cell assembly 10 includes at least one battery cell, and the battery cell is arranged in the accommodation cavity of the box body assembly.

[0081] The box assembly can be a simple three-dimensional structure such as a separate cuboid, cylinder, or sphere, or a complex three-dimensional structure composed of combinations of simple three-dimensional structures such as cuboids, cylinders, or spheres. The material of the box assembly can be alloy materials such as aluminum alloy and ferroalloy, or polymer materials such as polycarbonate and polyisocyanurate foam, or composite materials such as glass fiber reinforced epoxy resin.

[0082] The box assembly is used to encapsulate the battery cell assembly 10, and the box assembly can prevent liquids or other foreign objects from affecting the charging or discharging of the battery cell assembly 10.

[0083] As an example, please refer to Figure 2 , the box assembly may include a first box part 211 and a second box part 212. The first box part 211 and the second box part 212 are snapped together so that a closed space is formed inside the box assembly to accommodate the battery cell assembly 10. The term "closed" here means covered or closed, which can be sealed or non-sealed. The first box part 211 can be a top cover or a bottom plate.

[0084] As an example, the box assembly may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame so that a closed space is formed inside the box assembly to accommodate the battery cell assembly 10.

[0085] As an example, the box assembly can be part of the chassis structure of the vehicle 1000. For example, the top cover of the box assembly can become at least part of the floor of the vehicle 1000, or the frame of the box assembly can become at least part of the cross beams and longitudinal beams of the vehicle 1000.

[0086] The specific form of the continuous fiber is not limited here. For example, it is a continuous fiber wound together.

[0087] During production, the continuous fiber can be unwound, and the unwound continuous fiber is infiltrated with a thermoplastic resin to form a continuous fiber unidirectional tape 222.

[0088] Among them, unwinding means peeling off along the radial direction of the rolled substrate, so that the outer layer and the inner layer of the substrate are peeled off. Unwinding the continuous fiber means a process of peeling off the outer layer and the inner layer of the continuous fiber.

[0089] The continuous fiber is unwound, so that continuous and uninterrupted production can be carried out, which is beneficial to improving the production efficiency of the fiber unidirectional tape - metal structure 22.

[0090] Specifically, the continuous fiber is a flexible long strip structure with a certain width and thickness, but the length can be extended and bent according to actual situations.

[0091] The unwound continuous fibers are infiltrated with a thermoplastic resin to form a continuous fiber unidirectional tape 222. The continuous fiber unidirectional tape 222 has the advantages of high strength, few burrs, and high production efficiency. Moreover, the thermoplastic resin on the surface of the continuous fiber unidirectional tape 222 has not completely cooled and crystallized, and can penetrate into the micropores on the surface of the metal part 221, which is beneficial to increasing the adhesion between the continuous fiber and the metal part 221.

[0092] Here, the continuous fiber unidirectional tape 222 refers to a strip-shaped prepreg made by impregnating continuous fibers or unidirectional fabrics that are parallel to each other with resin.

[0093] Here, the matrix is, for example, a thermoplastic resin. The thermoplastic resin has the properties of softening when heated and hardening when cooled, and does not undergo chemical reactions. No matter how many times the heating and cooling are repeated, this property can be maintained. Due to good toughness, large damage tolerance, and good dielectric constant, the thermoplastic resin has an unlimited storage period, does not require low-temperature storage, and does not require large special equipment such as autoclaves for molding. In particular, its characteristics of good recyclability, recoverability, reusability, and non-pollution to the environment adapt to the development direction of environmental protection of materials today.

[0094] Here, the continuous fibers are infiltrated with a thermoplastic resin, which is beneficial to improving the bonding force between the continuous fibers and the metal part 221, and is beneficial to improving the structural strength of the fiber unidirectional tape - metal structure 22.

[0095] Exemplarily, the continuous fibers infiltrated with a thermoplastic resin are extruded and pulled to form a continuous fiber unidirectional tape 222.

[0096] Pulling the continuous fibers infiltrated with a thermoplastic resin is beneficial to realizing the continuity of infiltrating the continuous fibers, thereby realizing the continuity of the production of the fiber unidirectional tape - metal structure 22.

[0097] Extruding the continuous fibers infiltrated with a thermoplastic resin is beneficial to controlling the resin content of the fiber unidirectional tape - metal structure 22, thereby being beneficial to reducing costs.

[0098] Here, the method of extruding the continuous fibers infiltrated with a thermoplastic resin is not limited here. Exemplarily, for example, rolling is used to extrude the continuous fibers.

[0099] In this embodiment, extruding and pulling the continuous fibers infiltrated with a thermoplastic resin is beneficial to realizing the continuity of infiltrating the continuous fibers, thereby realizing the continuity of the production of the fiber unidirectional tape - metal structure 22, and at the same time, is beneficial to controlling the resin content of the fiber unidirectional tape - metal structure 22, thereby being beneficial to reducing costs.

[0100] Exemplarily, after the metal part 221 is heated through the heating area, it is compounded with the continuous fiber unidirectional tape 222, which is more conducive to the infiltration of the thermoplastic resin into the micropores on the surface of the metal part 221 and is conducive to increasing the adhesion between the continuous fiber and the metal part 221.

[0101] Exemplarily, please refer to Figure 3 and Figure 4 , the continuous fiber unidirectional tape 222 is coated on the surface of the metal part 221 and, through pultrusion molding, the fiber unidirectional tape - metal structure 22 is obtained.

[0102] Here, the specific type of the metal part 221 is not limited herein, for example, it is a metal plate, a metal strip or a metal block, etc.

[0103] The box body assembly includes the fiber unidirectional tape - metal structure 22, that is to say, at least part of the structure of the box body assembly is the fiber unidirectional tape - metal structure 22.

[0104] The battery device provided by the embodiment of the present application includes a box body assembly and a battery cell assembly 10. The battery cell assembly 10 is disposed in the accommodation cavity of the box body assembly, and the box body assembly plays a protective role for the battery cell assembly 10. On the one hand, by setting the fiber unidirectional tape - metal structure 22 of the box body assembly to include the metal part 221 and the continuous fiber unidirectional tape 222, the continuous fiber unidirectional tape 222 has the advantages of high strength, few burrs and high production efficiency. In addition, by using continuous fibers, it is not necessary to cut the continuous fibers and then attach the matrix to the continuous fibers to obtain the fiber unidirectional tape during the production process, so continuous and uninterrupted production can be carried out, further improving the production efficiency of the fiber unidirectional tape - metal structure 22. On the other hand, by coating the continuous fiber unidirectional tape 222 on the metal part 221, the fiber unidirectional tape - metal structure 22 can have good insulation performance and structural strength.

[0105] In some embodiments, please refer to Figure 3 and Figure 4 , the fiber unidirectional tape - metal structure 22 further includes an adhesive layer, and the adhesive layer is disposed between the metal part 221 and the continuous fiber unidirectional tape 222.

[0106] Exemplarily, the adhesive layer is, for example, a film - like adhesive segment.

[0107] Here, the adhesive layer may be provided on both sides of the metal part 221 along the thickness direction, or the adhesive layer may be provided on one side of the metal part 221 along the thickness direction.

[0108] In this embodiment, before wrapping the continuous fiber unidirectional tape 222 around the metal part 221, an adhesive layer is provided on the surface of the metal part 221. That is, by providing an adhesive layer between the continuous fiber unidirectional tape 222 and the metal part 221, the bonding effect between the continuous fiber unidirectional tape 222 and the metal part 221 can be improved.

[0109] In some embodiments, before wrapping the continuous fiber unidirectional tape 222 around the surface of the metal part 221, the surface of the metal part 221 is subjected to rust removal, degreasing, and roughening treatments.

[0110] It can be understood that rust, oil stains, and excessive smoothness on the surface of the metal part 221 will affect the adhesion of the thermoplastic resin. Therefore, the surface of the metal part 221 is subjected to rust removal, degreasing, and roughening treatments.

[0111] Exemplarily, after the surface of the metal part 221 is subjected to rust removal and degreasing treatments, it is dried.

[0112] In this embodiment, by subjecting the surface of the metal part 221 to rust removal, degreasing, and roughening treatments, it is beneficial to increase the adhesion between the thermoplastic resin and the metal part 221, thereby improving the production efficiency and structural strength of the fiber unidirectional tape - metal structure 22.

[0113] In some embodiments, the surface of the metal part 221 is provided with a concavo-convex structure (not shown in the figure).

[0114] It should be noted that the specific type of the concavo-convex structure is not limited herein. Exemplarily, the concavo-convex structure is, for example, a groove or a protrusion formed on the surface of the metal part 221.

[0115] The concavo-convex structure is, for example, concavo-convex points formed on the surface of a metal plate, and the addition of the concavo-convex structure serves as a gum-catching hole for the thermoplastic resin, improving the structural strength.

[0116] In this embodiment, by providing a concavo-convex structure on the surface of the metal part 221, the adhesion between the thermoplastic resin and the metal part 221 is further improved, thereby further improving the production efficiency and structural strength of the fiber unidirectional tape - metal structure 22.

[0117] In some embodiments, the width of the metal part 221 is smaller than the width of the continuous fiber unidirectional tape 222.

[0118] Exemplarily, the extending direction of the continuous fiber unidirectional tape 222 is the length direction of the continuous fiber unidirectional tape 222.

[0119] In this embodiment, by setting the width of the metal part 221 to be smaller than the width of the continuous fiber unidirectional tape 222, the continuous fiber unidirectional tape 222 can completely cover the metal part 221, that is, the entire outer surface of the metal part 221 can be covered. In this way, while ensuring the insulation of the fiber unidirectional tape-metal structure 22, the structural strength of the fiber unidirectional tape-metal structure 22 can be improved.

[0120] In some embodiments, the continuous fiber unidirectional tape 222 is wrapped around the metal part 221, and the temperature range for pultrusion molding is 180°C - 200°C.

[0121] For example, 180°C, 182°C, 185°C, 188°C, 190°C, 193°C, 195°C, 196°C, 198°C, 200°C, etc.

[0122] In this embodiment, by setting the temperature range for pultrusion molding to 180°C - 200°C, the thermoplastic resin can penetrate into the micropores on the surface of the metal part 221, which is beneficial to increasing the adhesion between the continuous fiber and the metal part 221.

[0123] In some embodiments, the heating temperature range of the heating area is 150°C - 200°C.

[0124] For example, 150°C, 153°C, 155°C, 159°C, 160°C, 162°C, 165°C, 168°C, 170°C, 174°C, 175°C, 176°C, 180°C, 182°C, 185°C, 188°C, 190°C, 193°C, 195°C, 196°C, 198°C, 200°C, etc.

[0125] In this embodiment, by setting the heating temperature range of the heating area to 150°C - 200°C, the metal part 221 can be heated to a preset temperature. On the one hand, it is beneficial to make the thermoplastic resin penetrate into the micropores on the surface of the metal part 221, which is beneficial to increasing the adhesion between the continuous fiber and the metal part 221. On the other hand, it is beneficial to better set the adhesive layer on the surface of the metal part 221, thereby facilitating the composite of the continuous fiber unidirectional tape 222 and the metal part 221.

[0126] In some embodiments, the heating time range of the metal part 221 in the heating area is 20s - 60s.

[0127] For example, 20s, 25s, 30s, 35s, 40s, 45s, 50s, 55s, 60s, etc.

[0128] In this embodiment, by setting the heating time range of the heating area to 20 s - 60 s, the metal part 221 can be heated to a preset temperature. On the one hand, it is beneficial for the thermoplastic resin to penetrate into the micropores on the surface of the metal part 221, which is beneficial to increasing the adhesion between the continuous fiber and the metal part 221. On the other hand, it is beneficial to better set the adhesive layer on the surface of the metal part 221, thereby facilitating the composite of the continuous fiber unidirectional tape 222 and the metal part 221.

[0129] Exemplarily, for example, after heating the metal part 221 in a heating area at a temperature of 200 °C for 30 s, an adhesive layer is set on the surface of the metal part 221, that is, the adhesive layer is attached to the surface of the metal part 221.

[0130] In some embodiments, the processing temperature range for infiltrating the unrolled continuous fiber with a thermoplastic resin to form the continuous fiber unidirectional tape 222 is 190 °C - 200 °C.

[0131] The processing temperature is, for example, 190 °C, 191 °C, 192 °C, 193 °C, 194 °C, 195 °C, 196 °C, 197 °C, 198 °C, 199 °C, 200 °C, and so on.

[0132] In this embodiment, by setting the processing temperature range for infiltrating the continuous fiber with a thermoplastic resin to form the continuous fiber unidirectional tape 222 to 190 °C - 200 °C, it is beneficial for the thermoplastic resin to better infiltrate the continuous fiber, thereby facilitating the improvement of the structural strength of the fiber unidirectional tape - metal structure 22.

[0133] It should be noted that the specific type of the matrix is not limited herein.

[0134] In some embodiments, the matrix includes polypropylene, nylon 6, or polyhexamethylene adipamide.

[0135] Here, the matrix can adopt polypropylene (PP) resin, nylon 6 (PA6, Polyamide6) resin, or polyhexamethylene adipamide (PA66, Nylon - 66) resin, that is, polypropylene (PP) resin, nylon 6 (PA6, Polyamide 6) resin, or nylon 66 (polyhexamethylene adipamide, PA66, Nylon - 66) resin can be attached to the continuous fiber to form the continuous fiber unidirectional tape 222.

[0136] In the embodiments of the present application, polypropylene resin is taken as an example for description.

[0137] In some embodiments, a polar additive is added to the matrix.

[0138] In this embodiment, a polar additive is added to the matrix, and then the unrolled continuous fibers are infiltrated through the matrix, that is, the matrix is attached to the continuous fibers to form a continuous fiber unidirectional tape 222. In this way, the adhesion between the continuous fiber unidirectional tape 222 and the metal part 221 can be increased, which is beneficial to improving the structural strength of the fiber unidirectional tape-metal structure 22.

[0139] It should be noted that the specific type of the polar additive is not limited herein.

[0140] Exemplarily, the polar additive includes maleic anhydride grafted ethylene-octene copolymer (POE-g-mah) or polyethylene-grafted maleic anhydride (PE-g-mah).

[0141] It should be noted that the specific type of the continuous fiber is not limited herein.

[0142] Exemplarily, the continuous fiber is continuous glass fiber. That is to say, the continuous fiber is composed of a continuous glass fiber bundle.

[0143] In this embodiment, by setting the continuous fiber to be composed of a continuous glass fiber bundle, the continuous glass fiber bundle is infiltrated through the matrix, that is, the matrix is attached to the continuous fiber to form a glass continuous fiber unidirectional tape 222, and it is continuously extruded and bonded to the surface of the metal part 221 to realize the composite between the continuous glass fiber and the metal part 221, obtaining the fiber unidirectional tape-metal structure 22, which has high structural strength and good insulation performance.

[0144] In some embodiments, please continue to refer to Figure 3 and Figure 4 , continuous fiber unidirectional tapes 222 are coated on both sides of the metal part 221 in the thickness direction.

[0145] That is to say, the number of layers of the continuous fiber unidirectional tape 222 is multiple, and it is arranged on both sides of the metal part 221 in the thickness direction, which is beneficial to further improving the structural strength of the fiber unidirectional tape-metal structure 22, thereby further improving the structural strength of the box assembly.

[0146] It should be noted that the number of layers of the continuous fiber unidirectional tapes 222 coated on both sides of the metal part 221 in the thickness direction can be the same or different.

[0147] In this embodiment, by coating continuous fiber unidirectional tapes 222 on both sides of the metal part 221 in the thickness direction, it is beneficial to further improve the structural strength of the fiber unidirectional tape-metal structure 22, thereby further improving the structural strength of the box assembly.

[0148] In some embodiments, please refer toFigure 4 On the same side of the metal part 221 in the thickness direction, there are multiple layers of continuously fiber unidirectional tapes 222 arranged in a stacked manner.

[0149] It can be understood that the metal part 221 is covered with multiple layers of continuously fiber unidirectional tapes 222 arranged in a stacked manner on the same side in the thickness direction, which can be that both sides of the metal part 221 in the thickness direction are covered with multiple layers of continuously fiber unidirectional tapes 222 arranged in a stacked manner, or that one side of the metal part 221 in the thickness direction is covered with multiple layers of continuously fiber unidirectional tapes 222 arranged in a stacked manner, and the other side is covered with a single layer of continuously fiber unidirectional tape 222.

[0150] In the embodiment where both sides of the metal part 221 in the thickness direction are covered with multiple layers of continuously fiber unidirectional tapes 222 arranged in a stacked manner, the number of continuously fiber unidirectional tapes 222 covered on both sides of the metal part 221 in the thickness direction can be the same or different.

[0151] In this embodiment, by covering the metal part 221 with multiple layers of continuously fiber unidirectional tapes 222 arranged in a stacked manner on the same side in the thickness direction, it is beneficial to further improve the structural strength of the fiber unidirectional tape - metal structure 22, thereby further improving the structural strength of the box assembly.

[0152] In some embodiments, please continue to refer to Figure 4 Among the continuously fiber unidirectional tapes 222 on the same side of the metal part 221 in the thickness direction, at least one layer of continuously fiber unidirectional tape 222 has an extension direction different from that of other continuously fiber unidirectional tapes 222.

[0153] The extension direction of the continuously fiber unidirectional tape 222 refers to the extension direction of the continuous fiber bundle.

[0154] At least one layer of continuously fiber unidirectional tape 222 having an extension direction different from that of other continuously fiber unidirectional tapes 222 means that the extension directions of the continuously fiber unidirectional tapes 222 on the same side of the metal part 221 in the thickness direction are not all the same.

[0155] Exemplarily, please refer to Figure 4 The extension directions of adjacent two layers of continuously fiber unidirectional tapes 222 are perpendicular to each other, and perpendicular to each other means completely perpendicular or approximately perpendicular.

[0156] In this embodiment, among the continuous fiber unidirectional tapes 222 on the same side of the metal part 221 in the thickness direction, the extending direction of at least one layer of the continuous fiber unidirectional tape 222 is set to be different from that of the other continuous fiber unidirectional tapes 222, which is beneficial to improving the strength performance of the fiber unidirectional tape - metal structure 22 in different directions, thereby further improving the structural strength of the fiber unidirectional tape - metal structure 22, and then improving the structural strength of the box assembly.

[0157] In some embodiments, the box assembly includes a box body 21, and the box body 21 includes a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, and at least one of the top cover, the frame, and the bottom plate is a fiber unidirectional tape - metal structure 22.

[0158] The top cover and the bottom plate are respectively connected to the frame, so as to form a closed space inside the box assembly for accommodating the battery cell assembly 10.

[0159] That at least one of the top cover, the frame, and the bottom plate is a fiber unidirectional tape - metal structure 22 means that it can be that one of the top cover, the frame, and the bottom plate is a fiber unidirectional tape - metal structure 22, or two of the top cover, the frame, and the bottom plate are fiber unidirectional tape - metal structures 22, or all three of the top cover, the frame, and the bottom plate are fiber unidirectional tape - metal structures 22, which is beneficial to improving the structural strength, insulation, and production efficiency of the top cover, the frame, and / or the bottom plate.

[0160] In some embodiments, the box assembly further includes a collision - proof structure. The collision - proof structure is arranged at one end of the box body 21, and at least part of the collision - proof structure protrudes from the outer surface of the box body 21. Among them, the collision - proof structure is a fiber unidirectional tape - metal structure 22.

[0161] By arranging a collision - proof structure at one end of the box body 21 and at least part of the collision - proof structure protruding from the outer surface of the box body 21, when the box assembly is impacted, it can first contact the collision - proof structure, thereby playing a certain protective role for the box body 21 and improving the impact resistance of the box assembly.

[0162] The collision - proof structure is a fiber unidirectional tape - metal structure 22, which is beneficial to improving the structural strength, insulation, and production efficiency of the collision - proof structure.

[0163] In this embodiment, the box assembly is provided with a collision - proof structure so that when the box assembly is impacted, it can first contact the collision - proof structure, thereby playing a certain protective role for the box body 21 and improving the impact resistance of the box assembly; in addition, by setting the collision - proof structure as a fiber unidirectional tape - metal structure 22, it is beneficial to further improve the structural strength, insulation, and production efficiency of the collision - proof structure.

[0164] In some embodiments, the box body assembly further includes a connecting beam disposed within the box body 21 and defining a receiving cavity together with the box body 21, and the battery cell assembly 10 is disposed within the receiving cavity. Here, the connecting beam is a fiber unidirectional tape - metal structure 22.

[0165] Here, the specific manner in which the connecting beam is connected to the box body 21 is not limited herein. Exemplarily, the connecting beam is welded or fastened to the box body 21.

[0166] Exemplarily, the connecting beam is, for example, a sheet metal part.

[0167] Here, the assembly manner between the battery cell assembly 10 and the connecting beam is not limited herein. Exemplarily, the battery cells are arranged within the receiving cavity, and the sides of the battery cells are abutted against by the box body 21 and / or the connecting beam. In this way, it is beneficial to enable the battery cells of the battery cell assembly 10 to be closely arranged. In addition, when the battery cells expand laterally, the box body 21 and / or the connecting beam can form a supporting effect on the battery cells, improving the anti - expansion ability of the battery cells and alleviating the problem of battery cell failure due to expansion force.

[0168] The connecting beam is a fiber unidirectional tape - metal structure 22, which is beneficial to improving the structural strength, insulation property, and production efficiency of the connecting beam.

[0169] In this embodiment, the box body assembly is provided with a connecting beam. The connecting beam and the box body 21 define a receiving cavity, and the battery cells are arranged within the receiving cavity. When the battery cells expand laterally, the box body 21 and / or the connecting beam can form a supporting effect on the battery cells, improving the anti - expansion ability of the battery cells and alleviating the problem of battery cell failure due to expansion force. In addition, by setting the connecting beam as a fiber unidirectional tape - metal structure 22, it is beneficial to further improve the structural strength, insulation property, and production efficiency of the connecting beam.

[0170] In the description of the present application, the descriptions with reference to terms such as "in one embodiment", "in some embodiments", "in other embodiments", "in still other embodiments", or "exemplary", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the present application, the schematic expressions of the above - mentioned terms are not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine different embodiments or examples described in the present application and the features of different embodiments or examples.

[0171] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application are all included within the protection scope of the present application.

Claims

1. A battery device, characterized in that, Comprising: Battery cell components; A box body component for accommodating the battery cell components; Wherein, the box body component includes a fiber unidirectional tape - metal structure, and the fiber unidirectional tape - metal structure includes: Metal parts; Continuous fiber unidirectional tapes, which are coated on the surface of the metal parts; The continuous fiber unidirectional tapes include continuous fibers and a matrix, and the matrix adheres to the continuous fibers.

2. The battery device according to claim 1, characterized in that, The fiber unidirectional tape - metal structure further includes an adhesive layer, and the adhesive layer is arranged between the metal parts and the continuous fiber unidirectional tapes.

3. The battery device according to claim 1, wherein The surface of the metal parts is provided with a concavo - convex structure.

4. The battery device according to claim 1, characterized in that, The width of the metal parts is smaller than the width of the continuous fiber unidirectional tapes.

5. The battery device according to claim 1, characterized in that, The matrix includes polypropylene, nylon 6 or nylon 66.

6. The battery device according to claim 5, characterized in that, Polarity additives are added to the matrix.

7. The battery device according to claim 6, characterized in that, The polarity additives include maleic anhydride grafted ethylene - octene copolymer or polyethylene - maleic anhydride graft.

8. The battery device according to claim 1, characterized in that, The continuous fibers are continuous glass fibers.

9. The battery device according to claim 1, wherein Both sides of the metal parts along the thickness direction are coated with the continuous fiber unidirectional tapes.

10. The battery device according to claim 1, characterized in that, On the same side of the metal parts along the thickness direction, multiple layers of the continuous fiber unidirectional tapes are stacked and arranged.

11. The battery device according to claim 10, characterized in that, Among the continuous fiber unidirectional tapes on the same side of the metal parts along the thickness direction, at least one layer of the continuous fiber unidirectional tapes has an extension direction different from that of other continuous fiber unidirectional tapes.

12. The battery device according to any one of claims 1-11, characterized in that, The box body component includes a box body, and the box body includes a top cover, a frame and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, and at least one of the top cover, the frame and the bottom plate is the fiber unidirectional tape - metal structure.

13. The battery device according to claim 12, wherein The box body component further includes an anti - collision structure, which is arranged at one end of the box body, and at least part of the anti - collision structure protrudes from the outer surface of the box body. Among them, the anti - collision structure is the fiber unidirectional tape - metal structure.

14. The battery device according to claim 12, characterized in that, The box body component further includes a connecting beam, which is arranged in the box body and defines an accommodation cavity with the box body, and the battery cell components are arranged in the accommodation cavity. Among them, the connecting beam is the fiber unidirectional tape - metal structure.

15. A box body assembly, characterized in that, The box body component is the box body component of the battery device according to any one of claims 1 - 14, and the box body component is used for accommodating the battery cell components.

16. An electrical device, characterized in that, Including the battery device according to any one of claims 1 - 14, and the battery device is used for providing electric energy.

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