Battery device and electric device

Abstract

The application belongs to the technical field of batteries, and particularly relates to a battery device and a power utilization device. The battery device comprises a box body and a battery monomer. The box body comprises a main body part and a cover connected to the main body part, and a containing cavity is formed between the main body part and the cover. The battery monomer is installed in the containing cavity. The cover comprises a first base and a first fiber body arranged in the first base, and the first fiber body comprises continuous fibers. The first fiber body is arranged in the first base of the cover, and the first fiber body comprises continuous fibers. Compared with short fibers, the continuous fibers have a longer length and can form a continuous mechanical skeleton. Stress can be directly transmitted along the length direction of the continuous fibers, the stress concentration problem is reduced, stronger support is provided, external force is resisted to reduce the deformation of the cover, and the reliability and stability of the battery device are improved.

Description

Technical Field

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

[0002] A battery device typically consists of a housing and individual battery cells housed within the housing. The housing protects the internal battery cells and plays a crucial role in resisting external impacts and preventing damage to the internal battery cells. Therefore, the housing needs to have sufficient structural strength.

[0003] In related technologies, the enclosure includes a cover. The cover has relatively low strength, especially under complex working conditions, such as when subjected to high-intensity external impacts, it is prone to deformation or damage. After long-term use, the cover may also experience structural failure, which seriously affects the overall structural stability of the enclosure. Utility Model Content

[0004] The purpose of this application is to provide a battery device and an electrical device to improve the problems of low stability of the housing structure and easy deformation of the cover in the battery device in the related art.

[0005] The technical solution adopted in the embodiments of this application is:

[0006] In a first aspect, a battery device is provided, comprising:

[0007] The box includes a main body and a cover disposed on the main body, with a receiving cavity formed between the main body and the cover;

[0008] A single battery cell is installed within the receiving cavity;

[0009] The cover body includes a first matrix and a first fiber body disposed within the first matrix, wherein the first fiber body includes continuous fibers.

[0010] In the battery device of this application embodiment, the first fiber body can act as the skeleton of the cover. The first fiber body can support the overall structure of the cover, improve the strength of the cover, reduce the deformation of the cover, and improve the structural stability of the casing, thereby improving the overall reliability and stability of the battery device. The first fiber body is arranged in the first matrix of the cover, and the first fiber body includes continuous fibers. Compared with chopped fibers, continuous fibers are longer and can form a continuous "mechanical skeleton". Stress can be directly transmitted along the length direction of the continuous fibers, reducing stress concentration problems and providing stronger support. Therefore, when the cover is subjected to a large external force, the first fiber body can provide support for the cover, resist the external force to reduce the deformation of the cover, thereby improving the reliability and stability of the battery device.

[0011] In some embodiments, the first matrix is ​​a polycaprolactam material body.

[0012] By adopting the technical solution of this embodiment, polycaprolactam exhibits good toughness, thus effectively reducing the risk of brittle fracture and failure of the cover under external forces. After being composited with the first fibrous material, the first matrix can absorb energy through plastic deformation, reducing fractures caused by stress concentration in the first fibrous material and improving the overall performance of the cover. For example, it can make the battery device more durable under vibration loads during vehicle operation. Furthermore, polycaprolactam is a thermoplastic resin; after being heated and melted, it can be molded through processes such as injection molding, extrusion, and compression molding. Compared with thermosetting resins (such as epoxy resin), polycaprolactam has a shorter molding cycle, making it suitable for mass production and reducing the manufacturing cost of the casing.

[0013] In some embodiments, the mass of the first fibrous body accounts for 60% to 80% of the total mass of the cover.

[0014] By adopting the technical solution of this embodiment, the first fiber body accounts for no less than 60% of the mass of the cover, which can effectively improve the strength of the cover and reduce the possibility of deformation. The first fiber body accounts for no more than 80% of the mass of the cover, ensuring sufficient content of the first matrix in the cover. The first matrix can form a continuous protective layer on the surface of the first fiber body, reducing the possibility of corrosion caused by direct contact with the external environment (such as electrolytes and moisture). Furthermore, the flexibility of the first matrix can absorb external stress, reducing the risk of breakage of the first fiber body.

[0015] In some embodiments, the first fiber body comprises one or more of glass fiber, carbon fiber, or basalt fiber.

[0016] By adopting the technical solution of this embodiment, the tensile strength and modulus of glass fiber, carbon fiber and basalt fiber are relatively high, which can significantly improve the overall performance of the cover and reduce the risk of cover deformation.

[0017] In some embodiments, a reinforcing layer is provided on the side of the cover.

[0018] By adopting the technical solution of this embodiment, a reinforcing layer is provided on the side of the cover, which can specifically improve the local strength of the cover, thereby improving the overall structural strength and deformation resistance of the cover, and improving the reliability and stability of the battery device.

[0019] In some embodiments, the reinforcing layer includes a second matrix and a second fiber body disposed within the second matrix, the second fiber body comprising continuous fibers and / or chopped fibers.

[0020] By adopting the technical solution of this embodiment, the composite of the second fiber body and the second matrix can fully utilize the reinforcing effect of the fibers, reducing the risk of dents and cracks in the cap. Furthermore, the performance of the reinforcing layer can be precisely customized by flexibly adjusting the type, content, and ratio of continuous and chopped fibers in the second fiber body. For example, increasing the proportion of continuous fibers can significantly enhance the rigidity of the reinforcing layer, making it suitable for applications requiring high strength; increasing the proportion of chopped fibers can improve the material's fatigue resistance and molding adaptability, meeting the needs of different application scenarios. Simultaneously, by combining it with a second matrix with different properties, the high-temperature resistance, corrosion resistance, and other properties of the reinforcing layer can be further enhanced.

[0021] In some embodiments, the second matrix is ​​a polycaprolactam material body.

[0022] By adopting the technical solution of this embodiment, polycaprolactam exhibits good toughness, thus effectively reducing the risk of brittle fracture and failure of the cover under external forces. When combined with the second fibrous material, the second matrix can absorb energy through plastic deformation, reducing fractures in the second fibrous material caused by stress concentration and improving the overall performance of the cover. For example, it can make the battery device more durable under vibration loads during vehicle operation. Furthermore, polycaprolactam is a thermoplastic resin; after being heated and melted, it can be molded through processes such as injection molding, extrusion, and compression molding. Compared with thermosetting resins (such as epoxy resin), polycaprolactam has a shorter molding cycle, making it suitable for mass production and reducing the manufacturing cost of the casing.

[0023] In some embodiments, the first substrate and the second substrate are an integral piece.

[0024] By adopting the technical solution of this embodiment, the first substrate and the second substrate are set as an integral part, which can improve the bonding strength between the first substrate and the second substrate, thereby ensuring the bonding stability between the first substrate and the second substrate and ensuring the overall strength of the cover.

[0025] In some embodiments, an adhesive layer is provided between the first substrate and the second substrate, and the second substrate is bonded to the surface of the first substrate through the adhesive layer.

[0026] By adopting the technical solution of this embodiment, an adhesive layer is provided between the first substrate and the second substrate, and the adhesive layer bonds the first substrate and the second substrate together. In this way, the position of the reinforcing layer can be set more flexibly, which facilitates the design and manufacturing of the cover.

[0027] In some embodiments, a groove is provided on one side of the cover away from the receiving cavity, and the reinforcing layer is at least partially disposed within the groove.

[0028] By adopting the technical solution of this embodiment, the reinforcing layer is disposed in a groove on the side of the cover away from the receiving cavity. This reduces the size of the reinforcing layer protruding from the side of the cover, thereby minimizing its impact on the overall size of the battery device and helping to improve the energy density of the battery device. Furthermore, the groove provides precise positioning and installation space for the reinforcing layer, reducing the processing difficulty of the cover and helping to improve the production efficiency of the cover.

[0029] In some embodiments, the side of the reinforcing layer opposite to the receiving cavity is flush with the side of the cover opposite to the receiving cavity; or,

[0030] The reinforcing layer is located within the groove on the side facing away from the receiving cavity.

[0031] By adopting the technical solution of this embodiment, the groove provides physical protection for the reinforcing layer, reducing the risk of the reinforcing layer being directly exposed to the outside. This effectively resists external impacts, friction, and corrosive media erosion, extending the service life of the reinforcing layer. Simultaneously, the groove reduces wear and cracking caused by direct contact between the edges of the reinforcing layer and the outside environment, helping the reinforcing layer maintain good mechanical properties and continuously providing stable strength support for the cover. Furthermore, the side of the reinforcing layer is flush with the side of the cover, keeping the outer surface of the cover smooth and flat. This not only improves the appearance of the battery device but also facilitates surface treatment processes such as coating and film application in practical applications. It also reduces the accumulation of dirt and impurities caused by raised structures, lowering the difficulty of cleaning and maintenance.

[0032] In some other embodiments, the side of the reinforcing layer facing away from the receiving cavity is located within a groove.

[0033] This reduces the risk of wear and cracking caused by direct contact between the side of the reinforcing layer and the outside environment, helps the reinforcing layer maintain good mechanical properties, and continuously provides stable strength support for the cover.

[0034] In some embodiments, the reinforcing layer includes a first segment and a second segment connected to the first segment, wherein the length direction of the second segment is set at an angle to the length direction of the first segment.

[0035] By adopting the technical solution of this embodiment, the first and second segments are connected at an angle, which can significantly enhance the structural strength and stability of the reinforcing layer. When the cover is subjected to external forces, this angled structure can change the stress transmission path, allowing stress to be dispersed and transmitted between segments in different directions, reducing local stress concentration, and effectively improving the cover's resistance to deformation and impact. For example, when the cover is subjected to a side impact, the first and second segments can work together to disperse the impact force, reducing the risk of dents and cracks in the cover, and better protecting the internal battery cells. In addition, the angled first and second segments can be flexibly arranged according to the stress characteristics and spatial shape of different parts of the cover. In complex-shaped cover structures, it can be designed to fit the contour of the cover, making full use of space to achieve effective reinforcement.

[0036] In some embodiments, the reinforcing layer further includes a third segment, the length direction of the third segment being at an angle to the length direction of the second segment, and the two ends of the second segment being connected to the first segment and the third segment, respectively.

[0037] By adopting the technical solution of this embodiment, the newly added third segment further enriches the structural form of the reinforcing layer, providing more space and possibilities for the integration of functional components. The flexibility of the three-segment structure allows the reinforcing layer to better fit the complex contours and irregular surfaces of the cover. During assembly, different models of covers can be quickly adapted by adjusting the included angle, length, and connection method between the first, second, and third segments, reducing assembly errors and debugging time.

[0038] In some embodiments, the reinforcing layer includes a ring portion disposed at the edge of the cover.

[0039] By adopting the technical solution of this embodiment, the edge of the cover is usually used to connect with the main body of the box. The ring of the reinforcing layer is set on the edge of the cover and arranged around the central axis of the cover, which can enhance the strength of the edge of the cover, thereby reducing the deformation of the cover and improving the overall performance of the battery device.

[0040] In some embodiments, the cover is provided with a first connection hole that penetrates the reinforcing layer and is used for fasteners to pass through.

[0041] By adopting the technical solution of this embodiment, stress concentration is likely to occur in the area around the first connection hole. By penetrating the reinforcing layer through the first connection hole, the reinforcing layer can improve the strength of the area around the first connection hole. In this way, the deformation of the area around the first connection hole can be reduced, and the overall performance of the battery device can be improved.

[0042] In some embodiments, the tensile strength of the cover is 300 MPa to 550 MPa; and / or,

[0043] The tensile modulus of the cover is 15 GPa to 30 GPa.

[0044] By adopting the technical solution of this embodiment, the tensile strength of the cover is set to 300MPa to 550MPa, enabling the cover to withstand high-intensity external forces. This effectively protects the cover from impacts such as collisions and compression. Furthermore, this strength range ensures that the cover is less prone to deformation due to internal pressure changes and temperature fluctuations during long-term use. Similarly, setting the tensile modulus of the cover to 15GPa to 30GPa allows the cover to withstand high-intensity external forces, effectively protecting it from impacts such as collisions and compression. This strength range also ensures that the cover is less prone to deformation due to internal pressure changes and temperature fluctuations during long-term use.

[0045] In some embodiments, the battery device further includes a heat insulation element disposed on the side of the cover facing the receiving cavity.

[0046] By adopting the technical solution of this embodiment, the heat insulation component is disposed on the side of the cover facing the receiving cavity, which can reduce heat transfer and significantly reduce the impact of the external high-temperature environment on the receiving cavity. This reduces the risk of performance degradation and shortened lifespan of individual battery cells due to excessive temperature, or failure of other electronic components inside the casing. Simultaneously, in low-temperature environments, the heat insulation component can reduce heat loss from the casing, maintain a suitable operating temperature, and improve the stability of the battery device under extreme climatic conditions. Furthermore, the heat insulation component can prevent or delay the transfer of heat generated by the individual battery cells to the cover, reducing the probability of cover failure due to high temperatures.

[0047] In some embodiments, a gap is formed between the heat insulation element and the cover.

[0048] By adopting the technical solution of this embodiment, a gap is formed between the heat insulation component and the cover. The gap can slow down the heat conduction between the heat insulation component and the cover. Air, as a poor conductor of heat, fills the heat conduction path between the heat insulation component and the cover, forming an additional heat insulation buffer layer, creating multiple obstacles and weakening heat transfer.

[0049] In some embodiments, the cover has a first mounting portion on the side facing the receiving cavity, and the heat insulation member has a second mounting portion, wherein the first mounting portion is connected to the second mounting portion.

[0050] By adopting the technical solution of this embodiment, after the first mounting part and the second mounting part are connected, a stable physical connection can be formed between the cover and the heat insulation component, reducing the displacement and loosening of the heat insulation component during long-term use of the box, so that the heat insulation component can continue to play its heat insulation role.

[0051] In some embodiments, the first mounting portion is a mounting post disposed on the cover, and the second mounting portion is a mounting hole disposed on the heat insulation member; or, the first mounting portion is the mounting hole disposed on the cover, and the second mounting portion is the mounting post disposed on the heat insulation member;

[0052] The mounting post passes through the mounting hole and is connected to the corresponding heat insulation element or the cover.

[0053] By adopting the technical solution of this embodiment, the structure of the mounting post and mounting hole can realize the synchronous positioning of the heat insulation component and the cover during the assembly process, which greatly simplifies the assembly process and helps to improve the assembly efficiency of the battery device.

[0054] In some embodiments, when the mounting post is disposed on the cover, the mounting post and the cover are integral parts.

[0055] By adopting the technical solution of this embodiment, the mounting column and the cover are integrated, which can improve the connection stability between the mounting column and the cover. When subjected to external force, the stress can be transmitted more evenly between the cover and the mounting column, reducing the risk of fracture caused by stress concentration at the connection point, and significantly enhancing the load-bearing capacity of the connection between the cover and the insulation component.

[0056] In some embodiments, the outer periphery of the mounting post is provided with a stepped surface, which abuts against the corresponding heat insulation member or the cover, so that a gap is formed between the heat insulation member and the cover.

[0057] By adopting the technical solution of this embodiment, a stepped surface is provided on the outer periphery of the mounting post. The stepped surface abuts against the corresponding heat insulation component or cover to form a contact limit, so that a gap can be formed between the heat insulation component and the cover. In this way, the assembly difficulty can be reduced and the assembly efficiency of the battery device can be improved.

[0058] In some embodiments, a mounting post is provided on the side of the first substrate facing the receiving cavity, and the mounting post is integral with the first substrate.

[0059] By adopting the technical solution of this embodiment, the one-piece molding process simplifies the manufacturing process, eliminating the need to process and assemble the mounting column and the first base separately, thus reducing assembly processes such as welding and riveting, as well as the investment in corresponding equipment.

[0060] In some embodiments, the first fiber body avoids the mounting post.

[0061] By adopting the technical solution of this embodiment, the first fiber body avoids the mounting column, that is, the mounting column does not contain the first fiber body, thus reducing the difficulty of shaping the mounting column.

[0062] Secondly, embodiments of this application also provide an electrical device, including a battery device as described in the above embodiments, the battery device being used to store or provide electrical energy.

[0063] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0064] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0065] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0066] Figure 2 This is a schematic diagram of the structure of the battery device provided in the embodiments of this application;

[0067] Figure 3 This is a schematic diagram of the structure of the cover and reinforcing layer provided in the embodiments of this application;

[0068] Figure 4 A schematic diagram of the first matrix and the first fiber provided in the embodiments of this application;

[0069] Figure 5 This is an exploded view of the cover and reinforcing layer provided in an embodiment of this application;

[0070] Figure 6 A schematic diagram of the second matrix and the second fiber provided in the embodiments of this application;

[0071] Figure 7 This is a top view of the cover provided in an embodiment of this application;

[0072] Figure 8 for Figure 7 A cross-sectional view at point AA in the diagram;

[0073] Figure 9 for Figure 8 Enlarged view of point C in the diagram;

[0074] Figure 10 An exploded view of the cover and heat insulation component provided in the embodiments of this application;

[0075] Figure 11for Figure 7 Schematic diagram of the cross section at BB in the middle;

[0076] Figure 12 for Figure 11 Enlarged diagram of point D in the diagram;

[0077] Figure 13 This is a partial structural diagram of the cover provided in an embodiment of this application.

[0078] The following are the labeling elements in the figure:

[0079] 100. Vehicle; 101. Controller; 102. Motor;

[0080] 200. Battery device;

[0081] 10. Box body; 1001. Receiving cavity; 11. Cover; 111. Groove; 112. First mounting part; 1121. Stepped surface; 113. First connecting hole; 114. First base; 115. First fiber body; 12. Main body; 121. Base plate; 122. Frame plate; 13. Limiting beam; 14. Reinforcing layer; 141. First section; 142. Second section; 143. Third section; 144. Ring; 145. Second base; 146. Second fiber body;

[0082] 20. Battery cell;

[0083] 30. Thermal insulation component; 31. Second mounting section. Detailed Implementation

[0084] To make the technical problem to be solved, the technical solution and the beneficial effects of this application clearer, the following is in conjunction with the appendix. Figures 1 to 13 The present application will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

[0085] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0086] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0087] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, "multiple sets" means two or more sets, "multiple pieces" means two or more pieces, and "several" means one or more, unless otherwise explicitly specified.

[0088] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0089] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0090] Unless otherwise specified, all steps of this application may be performed sequentially or randomly, preferably sequentially. For example, the method includes steps (a) and (b), indicating that the method may include steps (a) and (b) performed sequentially, or it may include steps (b) and (a) performed sequentially. For example, the mention that the method may also include step (c) indicates that step (c) may be added to the method in any order; for example, the method may include steps (a), (b), and (c), or it may include steps (a), (c), and (b), or it may include steps (c), (a), and (b), etc.

[0091] Currently, judging from market trends, the application of battery devices is becoming increasingly widespread. Battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields. With the continuous expansion of the application areas of power batteries, the market demand is also constantly increasing.

[0092] In the field of new energy vehicles and energy storage equipment, the reliability and lightweight design of battery devices are among the core research and development directions. Battery devices typically consist of a housing and individual battery cells housed within the housing. The housing protects the internal battery cells and plays a crucial role in resisting external impacts and preventing damage to the internal battery cells; therefore, the housing needs to have sufficient structural strength.

[0093] The enclosure includes the lid, which has relatively low strength. Various methods can be used to improve its performance. For example, reinforcing structures such as ribs can be added to the lid's surface to effectively distribute external loads using mechanical principles, thereby enhancing the lid's structural strength and reducing the risk of deformation.

[0094] However, in related technologies, the cover is often made of resin material. The material used to manufacture the cover itself has low strength, and the strength can be improved only to a limited extent by adding reinforcing structures. When the cover is subjected to high-intensity external forces under complex working conditions, the cover is still prone to deformation or damage. The stability of the cover is poor, and after long-term use, the cover may also experience structural failures, which is not conducive to improving the reliability and stability of the battery device.

[0095] Based on this, embodiments of this application provide a battery device and an electrical device. The battery device includes a housing, which comprises a housing body and a battery cell. The housing includes a main body and a cover connected to the main body, forming a receiving cavity between the main body and the cover. The battery cell is installed within the receiving cavity. The cover includes a first substrate and a first fiber body disposed within the first substrate. The first substrate is a thermoplastic material, and the first fiber body includes multiple continuous fibers. Compared to ordinary resin materials, the first fiber body can improve the strength of the cover body, reduce its deformation, and enhance the structural stability of the housing, thereby improving the overall reliability and stability of the battery device. The first fiber body, comprising continuous fibers, is arranged within the first substrate of the cover body. Compared to chopped fibers, continuous fibers are longer, forming a continuous "mechanical skeleton." Stress can be directly transmitted along the length of the continuous fibers, reducing stress concentration and providing stronger support. Therefore, when the cover body is subjected to a large external force, the first fiber body can provide support for the cover body, resisting the external force and reducing its deformation, thereby improving the reliability and stability of the battery device.

[0096] 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.

[0097] 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.

[0098] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use individual battery cells, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0099] For ease of explanation, an electrical device is provided in one embodiment of this application, which is illustrated using a vehicle as an example.

[0100] Figure 1 This is a structural schematic diagram of a vehicle 100 provided in some embodiments of this application.

[0101] Reference Figure 1 Vehicle 100 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 200 is installed inside vehicle 100, which can be located at the bottom, front, or rear of vehicle 100. The battery device 200 can be used to power vehicle 100; for example, it can serve as the operating power source for vehicle 100. Vehicle 100 may also include a controller 101 and a motor 102. The controller 101 controls the battery device 200 to supply power to the motor 102, for example, to meet the power needs of vehicle 100 during starting, navigation, and driving.

[0102] In some embodiments, the battery device 200 can not only serve as the operating power source for the vehicle 100, but also as the driving power source for the vehicle 100, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 100.

[0103] Figure 2 This is a schematic diagram of the structure of the battery device 200 provided in the embodiments of this application.

[0104] Reference Figure 2 The battery device 200 may include one or more battery cell groups for providing voltage and capacity. A battery cell group may include multiple battery cells 20, which are connected in series, parallel, or mixed connections via a busbar.

[0105] In some embodiments, a battery cell pack is typically formed by arranging a plurality of battery cells 20.

[0106] As an example, a battery cell group can be a battery module, which is formed by arranging and fixing multiple battery cells 20 into an independent module. As an example, a battery module can be formed by bundling multiple battery cells 20 together with cable ties.

[0107] In some embodiments, refer to Figure 2The battery device 200 can be a battery pack, which includes a housing 10 and one or more battery cell groups, with the battery cell groups housed in the housing 10.

[0108] As an example, the battery cell pack can be a battery module, and the battery cell pack can be housed in the housing 10 by fixing the battery module in the housing 10.

[0109] As an example, the battery cell pack can also be housed in the housing 10 by directly fixing multiple battery cells 20 to the housing 10.

[0110] In some embodiments, the housing 10 has an internal cavity 1001 to accommodate the battery cell 20. The housing 10 can be made of a material with a certain degree of hardness and strength, so that the housing 10 is not easily deformed when subjected to compression or impact, enabling the battery device 200 to have higher structural strength and improved reliability. The material of the housing 10 can be various, including but not limited to aluminum, stainless steel, aluminum alloy, iron, or plastic.

[0111] In some embodiments, the housing 10 may be part of the chassis structure of the vehicle 100. For example, a portion of the housing 10 may be at least a portion of the floor of the vehicle 100, or a portion of the housing 10 may be at least a portion of the crossbeams and longitudinal beams of the vehicle 100.

[0112] As an example, the housing 10 may include a first part and a second part, which are closed together to form a closed receiving cavity 1001 inside the housing 10 to accommodate the battery cell pack. Here, "closed" refers to covering or shutting off; it can be sealed or unsealed. The first part and the second part may be either the cover 11 or the main body 12 of the housing 10. Both the first and second parts may also be hollow structures with an opening on one side, with the opening side of the first part covering the opening side of the second part.

[0113] As an example, the housing 10 includes a main body 12 and a cover 11 connected to the main body 12. The main body 12 may include a frame and a bottom plate 121. The frame may be formed by multiple side plates 122 joined end to end. The cover 11 and the bottom plate 121 are respectively connected to the frame, so that a closed receiving cavity 1001 is formed inside the housing 10 to accommodate the battery cell pack.

[0114] In some embodiments, the housing 10 further includes a limiting beam 13, which can be installed in the receiving cavity 1001 inside the housing 10. The limiting beam 13 is used to hold the battery cell 20 to limit the expansion deformation of the battery cell 20. At the same time, the limiting beam 13 can also increase the structural strength of the housing 10 by connecting with the frame.

[0115] The following, combined with Figures 2 to 13 The battery device 200 of this application will be described in detail with reference to specific embodiments.

[0116] Figure 3 This is a schematic diagram of the structure of the cover 11 and the reinforcing layer 14 provided in the embodiments of this application; Figure 4 This is a schematic diagram of the first substrate 114 and the first fiber 115 provided in the embodiments of this application.

[0117] Reference Figures 2 to 4 This application provides a battery device 200, which includes a housing 10 and a battery cell 20. The housing 10 includes a main body 12 and a cover 11 connected to the main body 12, forming a receiving cavity 1001 between the main body 12 and the cover 11. The battery cell 20 is installed in the receiving cavity 1001. The cover 11 includes a first substrate 114 and a first fiber body 115 disposed in the first substrate 114. The first substrate 114 is a thermoplastic material, and the first fiber body 115 includes a plurality of continuous fibers.

[0118] In this embodiment, it should be noted that the cover 11 includes a first substrate 114 and a first fiber body 115 disposed within the first substrate 114. The first substrate 114 is a thermoplastic material, and the first fiber body 115 includes multiple continuous fibers. The cover is a continuous fiber reinforced thermoplastic composite material. A continuous fiber refers to a fiber whose length is significantly greater than its diameter and exists continuously throughout the material. The length of the continuous fiber is comparable to (or close to) the size of the structural component, rather than being chopped or discretely distributed. Compared to chopped fibers, continuous fibers are much longer. When the length of the continuous fibers of the first fiber body 115 extends along the length direction of the cover 11, the length of the continuous fibers of the first fiber body 115 can be equal to or slightly less than the length of the cover 11. When the length of the continuous fibers of the first fiber body 115 is slightly less than the length of the cover 11, the length value of the continuous fibers of the first fiber body 115 can be 95%, 90%, 85%, 80%, etc. of the length value of the cover 11. When the length of the continuous fibers of the first fiber body 115 extends along the width direction of the cover 11, the length of the continuous fibers of the first fiber body 115 can be equal to or slightly less than the width of the cover 11. When the length of the continuous fibers of the first fiber body 115 is slightly less than the width of the cover 11, the length value of the continuous fibers of the first fiber body 115 can be 95%, 90%, 85%, 80%, etc. of the width value of the cover 11.

[0119] It should be noted that the first fiber 115 is disposed within the first substrate 114, and the first fiber 115 is embedded within the first substrate 114, which can isolate the first fiber 115 from the external environment.

[0120] The multiple continuous fibers of the first fiber body 115 can be arranged regularly or irregularly within the first matrix 114. For example, the multiple continuous fibers of the first fiber body 115 can be arranged in parallel within the first matrix 114 (that is, the multiple continuous fibers of the first fiber body 115 are parallel to each other), arranged in a crisscross pattern, or distributed in a random cross pattern. A portion of the continuous fibers of the first fiber body 115 can be arranged according to a certain rule, while another portion can be arranged irregularly. The density of the first fiber body 115 can be uniform or varied along the thickness, length, and width directions of the first matrix 114.

[0121] In addition, in some embodiments, the first fiber body 115 may contain only continuous fibers, while in other embodiments, the first fiber body 115 may also include chopped fibers. In this case, both chopped fibers and continuous fibers are simultaneously disposed within the first matrix 114. The chopped fibers may be disposed in the edge region of the cover 11 or in the central region of the cover 11. Compared to continuous fibers, chopped fibers are shorter in length; for example, the length of the chopped fibers may be 1 mm to 15 mm.

[0122] It should be noted that the first substrate 114 is a thermoplastic material. Thermoplastic materials are polymeric materials that melt and soften upon heating and harden upon cooling, and this "melt-harden" process is a physical change that can be repeated. The molecular structure of thermoplastic materials is predominantly linear or branched, with molecules bonded by van der Waals forces or hydrogen bonds, rather than chemical bonds. Examples of thermoplastic materials include polypropylene, polyethylene, polyvinyl chloride, and polycaprolactam. In some embodiments, the material of the cover 11 can be determined by detecting the type of material in the first substrate 114 and the length of the fibers within the first fiber body 115.

[0123] It should be noted that the main body 12 can also be a continuous fiber reinforced thermoplastic composite material, that is, the main body 12 can be made of the same material as the cover 11 or different material. This application embodiment does not impose any restrictions here.

[0124] It should be noted that the housing 10 includes a main body 12 and a cover 11 connected to the main body 12. The main body 12 and the cover 11 can be directly connected, meaning they are in direct contact. Alternatively, they can be indirectly connected, meaning they are not in direct contact but are connected through other components. Furthermore, the main body 12 and the cover 11 can be fixedly connected, detachably connected, or otherwise. For example, the main body 12 and the cover 11 can be detachably connected using fasteners such as screws, or fixedly connected using rivets.

[0125] It should be noted that the battery cell 20 is installed in the receiving cavity 1001. The battery cell 20 can be directly connected to the inner wall of the receiving cavity 1001. For example, the battery cell 20 can be glued to the inner wall of the receiving cavity 1001 or installed on the inner wall of the receiving cavity by screws. Of course, the battery cell 20 can be installed in the receiving cavity by structural components such as mounting brackets.

[0126] The battery device 200 provided in this application embodiment includes a housing 10 and a battery cell 20. The housing 10 includes a main body 12 with a receiving cavity 1001 and a cover 11 connected to the main body 12. The main body 12 is also provided with an opening communicating with the receiving cavity 1001. The cover 11 can be connected to the main body 121 to seal the opening of the receiving cavity 1001. The battery cell 20 can be installed in the receiving cavity 1001 of the housing 10. The cover 11 is a continuous fiber reinforced thermoplastic composite material, that is, the cover 11 is made of continuous fiber reinforced thermoplastic composite material.

[0127] Thus, in the battery device 200 provided in this application embodiment, the first fiber 115 can act as the skeleton of the cover 11. The first fiber 115 can support the overall structure of the cover 11, improve the strength of the cover 11, reduce the deformation of the cover 11, and improve the structural stability of the housing 10, thereby improving the overall reliability and stability of the battery device 200. The first fiber 115 is arranged within the first substrate 114 of the cover 11, and the first fiber 115 includes continuous fibers. Compared with chopped fibers, continuous fibers are longer and can form a continuous "mechanical skeleton". Stress can be directly transmitted along the length direction of the continuous fibers, reducing stress concentration problems and providing stronger support. Therefore, when the cover 11 is subjected to a large external force, the first fiber 115 can provide support for the cover 11, resist the external force to reduce the deformation of the cover 11, thereby improving the reliability and stability of the battery device 200.

[0128] In a specific embodiment, the continuous fibers of the first fiber body 115 are arranged in a warp and weft pattern, with the fibers intersecting each other.

[0129] In some embodiments, the first substrate 114 is a polycaprolactam material body.

[0130] It should be noted that polycaprolactam material refers to structural components made of polycaprolactam. Polycaprolactam, commonly known as Nylon 6, is a polymer material formed by the ring-opening polymerization of caprolactam.

[0131] Polycaprolactam possesses good toughness, thus effectively reducing the risk of brittle fracture and failure of the cover 11 under external forces. When combined with the first fiber 115, the first matrix 114 can absorb energy through plastic deformation, reducing the risk of fracture in the first fiber 115 due to stress concentration, and improving the overall performance of the cover. For example, it can make the battery device 200 more durable under vibration loads. Furthermore, polycaprolactam is a thermoplastic resin; after being heated and melted, it can be molded through processes such as injection molding, extrusion, and compression molding. Compared to thermosetting resins (such as epoxy resin), polycaprolactam has a shorter molding cycle, making it suitable for mass production and reducing the manufacturing cost of the casing 10.

[0132] In some embodiments, the cap 11 can be formed using a high-pressure resin transfer molding process. For example, the first fiber 115 raw material can be first cut and shaped, then placed into a mold. After the mold is closed, the air inside the mold is removed, creating a vacuum. Then, a fully mixed mixture of caprolactam monomers, catalysts, activators, and other materials is injected into the mold using an injection gun. Under high temperature, the caprolactam undergoes ring-opening polymerization, ultimately reacting and solidifying to form the cap, which is then demolded.

[0133] In some embodiments, the mass of the first fiber body 115 accounts for 60% to 80% of the total mass of the cover body 11.

[0134] It should be noted that the total mass of the cover 11 can be the sum of the masses of the first fiber body 115 and the first base body 114. When the cover 11 also includes other components, the total mass of the cover 11 can be the sum of the masses of the first fiber body 115, the first base body 114 and other components.

[0135] For example, the mass of the first fiber body 115 may account for 60%, 62%, 64%, 66%, 68%, 70%, 72%, 74%, 76%, 78%, or 80% of the total mass of the cover body 11.

[0136] The first fiber 115 accounts for no less than 60% of the mass of the cover 11, which can effectively improve the strength of the cover 11 and reduce the possibility of deformation. The first fiber 115 accounts for no more than 80% of the mass of the cover 11, which can ensure that the content of the first matrix 114 in the cover 11 is sufficient. The first matrix 114 can form a continuous protective layer on the surface of the first fiber 115, reducing the possibility of corrosion caused by direct contact between the first fiber 115 and the external environment (such as electrolytes and moisture). In addition, the flexibility of the first matrix 114 can absorb external stress, reducing the risk of breakage of the first fiber 115.

[0137] In some embodiments, the ratio can be calculated by separating the first fiber body 115 and other components of the cover 11 (such as the first matrix 114), measuring their masses separately, and then calculating the ratio. For example, the fiber cover 11 can be weighed, and then the other components of the cover (such as the first matrix 114) can be dissolved using a specific solvent to obtain the first fiber body 115 separately. The obtained first fiber body 115 can then be weighed, and the mass percentage of the first fiber can be calculated.

[0138] In some embodiments, the first fiber body 115 comprises one or more of glass fiber, carbon fiber, or basalt fiber.

[0139] It should be noted that the first fiber body 115 may contain one type of continuous fiber, such as glass fiber, carbon fiber, or basalt fiber. In other embodiments, the first fiber body 115 may contain two types of continuous fibers, for example, a portion of all continuous fibers may be glass fiber and another portion may be carbon fiber; or, a portion of all continuous fibers may be glass fiber and another portion may be basalt fiber; or, in other embodiments, a portion of all continuous fibers may be carbon fiber and another portion may be basalt fiber; in still other embodiments, the first fiber body 115 may contain three or more types of continuous fibers, with a portion of all continuous fibers being glass fiber, another portion being basalt fiber, and the remainder being carbon fiber. The embodiments described in this application are not limited herein.

[0140] Among them, glass fiber, carbon fiber and basalt fiber have relatively high tensile strength and modulus, which can significantly improve the overall performance of the cover and reduce the risk of cover deformation.

[0141] Figure 5 This is an exploded view of the cover 11 and the reinforcing layer 14 provided in the embodiments of this application.

[0142] Reference Figure 3 and Figure 5 In some embodiments, a reinforcing layer 14 is provided on the side of the cover 11.

[0143] It should be noted that, in this embodiment, the side of the cover 11 refers to the side of the cover facing the receiving cavity 1001, or the side of the cover away from the receiving cavity 1001. In some embodiments, the reinforcing layer 14 can be disposed on the side of the cover 11 away from the receiving cavity 1001; in other embodiments, the reinforcing layer 14 can be disposed on the side of the cover 11 facing the receiving cavity 1001; and in still other embodiments, the reinforcing layer 14 can be disposed on both the side of the cover 11 away from the receiving cavity 1001 and the side of the cover 11 facing the receiving cavity 1001. The reinforcing layer 14 can protrude from the side of the cover 11. Of course, the side of the cover 11 can be provided with a groove structure to accommodate the reinforcing layer 14, thereby reducing the height of the reinforcing layer 14, or making the reinforcing layer 14 not protrude from the side of the cover 11.

[0144] The shape of the reinforcing layer 14 can be varied. For example, the reinforcing layer 14 can be in the form of strips, blocks, etc., and this embodiment of the application is not limited thereto. The material of the reinforcing layer 14 can be the same as that of the cover or different from that of the cover 11. For example, a high-strength material can be used to manufacture the reinforcing layer 14.

[0145] A reinforcing layer 14 is provided on the side of the cover 11, which can specifically improve the local strength of the cover 11, thereby improving the overall structural strength and deformation resistance of the cover 11, and improving the reliability and stability of the battery device 200.

[0146] Figure 6 This is a schematic diagram of the second substrate 145 and the second fiber 146 provided in the embodiments of this application.

[0147] Reference Figure 6 In some embodiments, the reinforcing layer 14 includes a second substrate 145 and a second fiber body 146 disposed within the second substrate 145, the second fiber body 146 including continuous fibers and / or chopped fibers.

[0148] It should be noted that the second fiber body 146 comprising continuous fibers and / or chopped fibers means that the second fiber body 146 may contain only continuous fibers or only chopped fibers; of course, the second fiber body 146 may also contain both continuous and chopped fibers simultaneously. Continuous fibers are fibers whose length is significantly greater than their diameter and which exist continuously throughout the material. The length of continuous fibers is comparable to (or close to) the dimensions of the structural component, rather than being chopped or discretely distributed. Compared to chopped fibers, continuous fibers are much longer. When the second fiber body 146 comprises continuous fibers and the length of the continuous fibers of the second fiber body 146 extends along the length direction of the reinforcing layer 14, the length of the continuous fibers of the second fiber body 146 can be equal to or slightly less than the length of the reinforcing layer 14. When the length of the continuous fibers of the second fiber body 146 is slightly less than the length of the reinforcing layer 14, the length value of the continuous fibers of the second fiber body 146 can be 95%, 90%, 85%, 80%, etc., of the length value of the reinforcing layer 14. When the length of the continuous fibers of the second fiber body 146 extends along the width direction of the reinforcing layer 14, the length of the continuous fibers of the second fiber body 146 can be equal to or slightly less than the width of the reinforcing layer 14. When the length of the continuous fibers of the second fiber body 146 is slightly less than the width of the reinforcing layer 14, the length value of the continuous fibers of the second fiber body 146 can be 95%, 90%, 85%, 80%, etc., of the width value of the reinforcing layer 14. Compared to continuous fibers, chopped fibers are shorter in length; for example, the length of chopped fibers can be 1mm to 15mm.

[0149] It should be noted that the second fiber 146 is disposed within the second substrate 145, that is, the second fiber 146 is embedded within the second substrate 145, and the second substrate 145 isolates the second fiber 146 from the external environment.

[0150] It should be noted that when the second fiber body 146 contains continuous fibers, the continuous fibers of the second fiber body 146 can be arranged regularly or irregularly within the second matrix 145. For example, the continuous fibers of the second fiber body 146 can be arranged in parallel, crisscrossed in a warp and weft pattern, or randomly distributed. A portion of the continuous fibers of the second fiber body 146 may be arranged according to a certain rule, while another portion may be arranged irregularly. When the second fiber body 146 contains chopped fibers, the chopped fibers of the second fiber body 146 can be arranged regularly or irregularly within the second matrix 145. For example, the chopped fibers of the second fiber body 146 can be arranged in parallel, crisscrossed in a warp and weft pattern, or randomly distributed. A portion of the chopped fibers of the second fiber body 146 may be arranged according to a certain rule, while another portion may be arranged irregularly. Along the thickness, length, and width directions of the second matrix 145, the density of the second fiber 146 can be uniform or varied.

[0151] The composite of the second fiber body 146 and the second matrix 145 can fully utilize the reinforcing effect of the fibers, reducing the risk of dents and cracks in the cover body 11. Furthermore, the performance of the reinforcing layer can be precisely customized by flexibly adjusting the type, content, and ratio of continuous and chopped fibers in the second fiber body 146. For example, increasing the proportion of continuous fibers can significantly enhance the rigidity of the reinforcing layer, making it suitable for applications requiring high strength; increasing the proportion of chopped fibers can improve the material's fatigue resistance and molding adaptability, meeting the needs of different application scenarios. Simultaneously, by combining it with a second matrix 145 with different properties, the high-temperature resistance and corrosion resistance of the reinforcing layer 14 can be further enhanced.

[0152] In some embodiments, the second matrix 145 is a polycaprolactam material body.

[0153] Polycaprolactam possesses good toughness, thus effectively reducing the risk of brittle fracture and failure of the cover under external forces. When combined with the second fiber 146, the second matrix 145 can absorb energy through plastic deformation, reducing stress concentration-induced fracture of the second fiber 146 and improving the overall performance of the cover 11. For example, it can make the battery device 200 more durable under vibration loads during vehicle operation. Furthermore, polycaprolactam is a thermoplastic resin; after melting, it can be molded through injection molding, extrusion, and compression molding. Compared to thermosetting resins (such as epoxy resin), polycaprolactam has a shorter molding cycle, making it suitable for mass production and reducing the manufacturing cost of the casing.

[0154] In some embodiments, the first substrate 114 and the second substrate 145 are integral parts.

[0155] It should be noted that when the first substrate 114 and the second substrate 145 are integrally formed, the first fiber 115 within the first substrate 114 will not extend into the second substrate 145, and the second fiber 146 within the second substrate 145 will not extend into the first substrate 114. The location of the reinforcing layer 14 can be determined by detecting the arrangement area of ​​the first fiber 115 and the second fiber 146.

[0156] By making the first substrate 114 and the second substrate 145 into one piece, the bonding strength of the first substrate 114 and the second substrate 145 can be improved, thereby ensuring the bonding stability of the first substrate 114 and the second substrate 145 and ensuring the overall strength of the cover 11.

[0157] In some embodiments, the first substrate 114 and the second substrate 145 can both be polycaprolactam materials. This facilitates the molding of the cover 11.

[0158] In some embodiments, the cap 11 can be formed using high-pressure resin transfer molding (HP-RTM). For example, the first fiber 115 and the second fiber 146 raw materials can be cut and shaped firstly, then the first fiber 115 and the second fiber 146 can be placed as a whole into a mold. After the mold is closed, the air inside the mold is removed, creating a vacuum. Then, a fully mixed mixture of caprolactam monomers, catalysts, activators, and other materials is injected into the mold using an injection gun. Under high temperature, the caprolactam undergoes ring-opening polymerization, ultimately reacting and solidifying to form the cap, which is then demolded.

[0159] In other embodiments, an adhesive layer is provided between the first substrate 114 and the second substrate 145, and the second substrate 145 is bonded to the surface of the first substrate 114 by the adhesive layer.

[0160] It should be noted that the adhesive layer can be used to bond the first substrate 114 and the second substrate 145. Therefore, the first substrate 114 and the second substrate 145 do not have to be a single piece. They are separate components that are bonded together by the adhesive layer.

[0161] An adhesive layer is provided between the first substrate 114 and the second substrate 145 to bond the first substrate 114 and the second substrate 145 together. This allows for more flexible placement of the reinforcing layer 14, facilitating the design and manufacture of the cover 11.

[0162] In this embodiment, the reinforcing layer 14 is disposed on the side of the cover 11 opposite to the receiving cavity 1001.

[0163] In this embodiment, the second fiber 146 includes one or more of glass fiber, carbon fiber, or basalt fiber.

[0164] It should be noted that the second fiber body 146 may contain a plurality of continuous fibers and / or chopped fibers. In some embodiments, all fibers in the second fiber body 146 may be of the same type, for example, all of them may be glass fibers, carbon fibers, or basalt fibers; in other embodiments, the second fiber body 146 may contain two or more types of fibers, for example, one part may be glass fibers and the other part may be carbon fibers; and in still other embodiments, the second fiber body 146 may contain three or more types of fibers. The embodiments of this application are not limited herein. Furthermore, continuous fibers and chopped fibers refer to fibers of different lengths, and the fiber types of both may be the same, for example, all of them may be glass fibers, carbon fibers, or basalt fibers.

[0165] Glass fiber, carbon fiber, and basalt fiber all have high tensile strength and modulus, which can significantly improve the overall performance of the cover 11 and reduce the risk of cover deformation.

[0166] Furthermore, the fiber types of the second fiber body 146 and the first fiber body 115 can be the same, or of course, different.

[0167] Reference Figure 3 The cover 11 has a groove 111 on the side opposite to the receiving cavity 1001, and the reinforcing layer 14 is at least partially disposed in the groove 111.

[0168] It should be noted that the reinforcement layer 14 is at least partially disposed within the groove 111, meaning that the reinforcement layer 14 can be partially or entirely disposed within the groove 111. When the reinforcement layer 14 is partially disposed within the groove 111, a portion of the reinforcement layer 14 is located outside the groove 111. When the reinforcement layer 14 is entirely disposed within the groove 111, the reinforcement layer 14 will not protrude from the side of the cover 11.

[0169] By placing the reinforcing layer 14 within the groove 111 on the side of the cover 11 opposite to the receiving cavity 1001, the size of the reinforcing layer 14 protruding from the side of the cover 11 can be reduced. This minimizes the impact of the reinforcing layer 14 on the overall size of the battery device 200, thus helping to improve the energy density of the battery device 200. Furthermore, the groove 111 provides precise positioning and installation space for the reinforcing layer 14, reducing the processing difficulty of the cover 11 and helping to improve the production efficiency of the cover 11.

[0170] Figure 7 This is a top view of the cover 11 provided in an embodiment of this application; Figure 8 for Figure 7 A cross-sectional view at point AA in the diagram; Figure 9 for Figure 8 An enlarged diagram of point C in the diagram.

[0171] Reference Figures 7 to 9 In some embodiments, the side of the reinforcing layer 14 facing away from the receiving cavity 1001 is flush with the side of the cover 11 facing away from the receiving cavity 1001.

[0172] The groove 111 provides physical protection for the reinforcing layer 14, reducing the risk of direct exposure and effectively resisting external impacts, friction, and corrosive media, thus extending the service life of the reinforcing layer. Simultaneously, the groove 111 reduces wear and cracking caused by direct contact between the edges of the reinforcing layer 14 and the external environment, helping the reinforcing layer 14 maintain good mechanical properties and continuously provide stable strength support for the cover 11. Furthermore, the side of the reinforcing layer 14 is flush with the side of the cover 11, keeping the outer surface of the cover 11 smooth and flat. This not only enhances the appearance of the battery device 200 but also facilitates surface treatment processes such as coating and film application in practical applications. It also reduces the accumulation of dirt and impurities due to raised structures, lowering the difficulty of cleaning and maintenance.

[0173] Of course, in some other embodiments, the side of the reinforcing layer 14 facing away from the receiving cavity 1001 is located in the groove 111.

[0174] In this way, the wear and cracking caused by direct contact between the side of the reinforcing layer 14 and the outside can be reduced, which helps the reinforcing layer 14 maintain good mechanical properties and continuously provide stable strength support for the cover 11.

[0175] Reference Figures 3 to 7 In some embodiments, the reinforcing layer 14 includes a first segment 141 and a second segment 142 connected to the first segment 141, wherein the length direction of the second segment 142 is set at an angle to the length direction of the first segment 141.

[0176] It should be noted that the first segment 141 may include a portion of the second matrix 145 and a portion of the second fiber body 146, and the second segment 142 may include a portion of the second matrix 145 and a portion of the second fiber body 146.

[0177] It should be noted that the length direction of the second segment 142 is set at an angle to the length direction of the first segment 141. The second segment 142 and the first segment 141 are not parallel. An acute angle, a right angle, or an obtuse angle can be formed between the second segment 142 and the first segment 141. In some embodiments, the first segment 141 and the second segment 142 can be arranged intersectingly, that is, the non-end regions of the first segment 141 are connected to the non-end regions of the second segment 142. In this way, the first segment 141 and the second segment 142 can be arranged in an "X" shape. Of course, in other embodiments, the non-end regions of the first segment 141 can be connected to the end regions of the second segment 142. In this way, the first segment 141 and the second segment 142 can be arranged in a "T" shape. In still some embodiments, the end regions of the first segment 141 can be connected to the end regions of the second segment 142. In this way, the first segment 141 and the second segment 142 can be arranged in an "L" shape.

[0178] The first segment 141 and the second segment 142 are connected at an angle, which can significantly enhance the structural strength and stability of the reinforcing layer 14. When the cover 11 is subjected to external forces, this angled structure can change the stress transmission path, allowing stress to be dispersed and transmitted between segments in different directions, reducing local stress concentration, and effectively improving the cover's resistance to deformation and impact. For example, when the cover 11 is subjected to a side impact, the first segment 141 and the second segment 142 can work together to disperse the impact force, reducing the risk of dents and cracks in the cover 11, and better protecting the internal battery cells 20. In addition, the angled arrangement of the first segment 141 and the second segment 142 can be flexibly arranged according to the stress characteristics and spatial shape of different parts of the cover 11. In complex-shaped cover 11 structures, it can be designed to fit the contour of the cover 11, making full use of space to achieve effective reinforcement.

[0179] Continue to refer to Figures 3 to 7 In some embodiments, the reinforcing layer 14 further includes a third segment 143, the length direction of the third segment 143 is set at an angle to the length direction of the second segment 142, and the two ends of the second segment 142 are connected to the first segment 141 and the third segment 143 respectively.

[0180] It should be noted that a portion of the second matrix 145 and a portion of the second fiber 146 form the third segment 143.

[0181] It should be noted that the length direction of the second segment 142 is at an angle to the length direction of the third segment 143. The second segment 142 and the third segment 143 are not parallel, and an acute angle, a right angle, or an obtuse angle can be formed between them. In some embodiments, the third segment 143 and the second segment 142 can be intersected, that is, the non-end regions of the third segment 143 are connected to the non-end regions of the second segment 142, thus forming an "X" shape. In other embodiments, the non-end regions of the third segment 143 can be connected to the end regions of the second segment 142, thus forming a "T" shape. In still other embodiments, the end regions of the third segment 143 can be connected to the end regions of the second segment 142, thus forming an "L" shape. Furthermore, the third segment 143 and the first segment 141 can be parallel or non-parallel (i.e., at an angle).

[0182] The third segment 143 further enriches the structural form of the reinforcing layer 14, providing more space and possibilities for the integration of functional components. The flexibility of the three-segment structure allows the reinforcing layer to better conform to the complex contours and irregular surfaces of the cover. During assembly, different models of covers 11 can be quickly adapted by adjusting the included angle, length, and connection method between the first segment 141, the second segment 142, and the third segment 143, reducing assembly errors and debugging time.

[0183] In other embodiments, the reinforcing layer 14 may also include a fourth segment, a fifth segment, a sixth segment, and so on.

[0184] Continue to refer to Figures 3 to 7 The reinforcing layer 14 includes a ring portion 144, which is disposed at the edge of the cover 11.

[0185] It is understood that the ring portion 144 is provided at the edge of the cover 11 and arranged around the central axis of the cover 11. The edge of the cover 11 is usually used to connect with the main body portion 12 of the housing 10. By providing the ring portion 144 of the reinforcing layer 14 at the edge of the cover 11 and arranging it around the central axis of the cover 11, the strength of the edge of the cover 11 can be enhanced, thereby reducing the deformation of the cover 11 and improving the overall performance of the battery device 200.

[0186] In some embodiments, the cover 11 is provided with a first connection hole 113 that penetrates the reinforcing layer 14 and is used for fasteners to pass through.

[0187] It should be noted that the fastener can be a component that connects the cover 11 and the main body 12 of the box 10. Of course, the fastener can also be used to connect the cover 11 to other structural components.

[0188] It should be noted that the first connecting hole 113 can penetrate the edge region of the reinforcing layer 14 or the non-edge region of the reinforcing layer 14. Figures 3 to 7 The first connection hole 113 shown penetrates the non-edge area of ​​the reinforcing layer 14.

[0189] It is understandable that stress concentration is likely to occur in the area around the first connection hole 113. By extending the first connection hole 113 through the reinforcing layer 14, the reinforcing layer 14 can improve the strength of the area around the first connection hole 113. In this way, the deformation of the area around the first connection hole 113 can be reduced, and the overall performance of the battery device 200 can be improved.

[0190] In this embodiment, the reinforcing layer 14 includes a first segment 141, a second segment 142, and a third segment 143. The two ends of the second segment 142 are perpendicularly connected to the first segment 141 and the third segment 143, respectively. The first segment 141, the second segment 142, and the third segment 143 are generally "H" shaped. The cover 11 is provided with two first connecting holes 113. One first connecting hole 113 is provided in the connection area between the first segment 141 and the second segment 142, and the other first connecting hole 113 is provided in the connection area between the second segment 142 and the third segment 143.

[0191] In some embodiments, the tensile strength of the cover 11 is 300 MPa to 550 MPa.

[0192] It should be noted that the tensile strength of the cover 11 mentioned here refers to the tensile strength of the cover 11 under dry conditions. The tensile strength of the cover 11 can be tested. For example, specimens can be taken from different parts of the cover 11 (such as areas with reinforcing layer 14 and areas without reinforcing layer 14). The specimen shape is usually dumbbell-shaped or rectangular strip, and the length direction should be consistent with the main stress direction of the cover 11 to ensure that the specimen is representative (if the cover structure is complex, key stress-bearing parts can be selected for sampling based on the stress distribution characteristics of the cover 11). Vernier calipers or micrometers can be used to measure the width and thickness at different positions (at least 3 measurements) on the parallel section of the specimen, and the average value is recorded as the original size of the specimen. Then, the specimen is installed in the fixture of the universal testing machine, ensuring that the specimen is clamped accurately to reduce eccentric forces. Then, the universal testing machine is started, and the specimen is stretched at the set tensile speed until the specimen breaks. The fracture process and fracture location of the specimen are observed, and the maximum load value at fracture is recorded. Finally, the tensile strength can be determined using the formula. Calculate the tensile strength of the cover. Where σ is the tensile strength (MPa), F is the maximum load at which the specimen breaks (N), b is the specimen width (mm), and h is the specimen thickness (mm).

[0193] The tensile strength of the cover 11 is set to 300MPa to 550MPa, enabling it to withstand high-intensity external forces. This effectively protects the cover from impacts such as collisions and compression. Furthermore, this strength range ensures that the cover 11 is less prone to deformation due to internal pressure changes, temperature fluctuations, or other factors during long-term use.

[0194] In some embodiments, the tensile modulus of the cover 11 is 15 GPa to 30 GPa.

[0195] It should be noted that the tensile modulus of the cover 11 mentioned here refers to the tensile modulus of the cover 11 under dry conditions. The tensile modulus of the cover 11 can be tested. The test method for tensile modulus is similar to that for tensile strength. During the test, the load (F), displacement (ΔL), original width (b) and thickness (h) of the specimen, and extensometer gauge length (L0) data can be collected. The stress (σ) and strain (ε) can be calculated using the following formulas:

[0196]

[0197] Then the tensile modulus (E) is calculated using the following formula:

[0198]

[0199] The tensile modulus of the cover 11 is set to 15GPa to 30GPa, enabling the cover 11 to withstand high-intensity external forces. Thus, the cover 11 can effectively resist external impacts such as collisions and compression. In addition, this strength range ensures that the cover 11 is not easily deformed due to internal pressure changes, temperature fluctuations, or other factors during long-term use.

[0200] Figure 10 An exploded view of the cover 11 and the heat insulation component 30 provided in the embodiments of this application; Figure 11 for Figure 7 Schematic diagram of the cross section at BB in the middle; Figure 12 for Figure 11 An enlarged diagram of point C in the diagram.

[0201] Reference Figures 9 to 12 In some embodiments, the battery device 200 further includes a heat insulation element 30 disposed on the side of the cover 11 facing the receiving cavity 1001.

[0202] It should be noted that the heat insulation component 30 is disposed on the side of the cover 11 facing the receiving cavity 1001, that is, the heat insulation component 30 is disposed between the battery cell 20 and the cover 11. The heat insulation component 30 can reduce heat transfer, significantly reducing the impact of external high or low temperature environments on the receiving cavity 1001, reducing the risk of performance degradation and shortened lifespan of the battery cell 20 due to excessively high or low temperatures, or failure of other electronic components inside the housing 10. At the same time, in low temperature environments, the heat insulation component 30 can reduce heat loss inside the housing 10, maintain a suitable operating temperature, and improve the stability of the battery device under extreme climatic conditions. In addition, the heat insulation component 30 can prevent or delay the heat generated by the battery cell 20 from being transferred to the cover 11, reducing the probability of the cover 11 failing due to high temperature.

[0203] The heat insulation component 30 can be in the form of a sheet, a block, or other shapes, and this application does not limit the specific form. In some embodiments, the heat insulation component 30 is in the form of a sheet.

[0204] In some embodiments, the heat insulation element 30 may be mica, foam, etc.

[0205] In some embodiments, a gap is formed between the heat insulation element 30 and the cover 11.

[0206] A gap is formed between the heat insulation element 30 and the cover 11. The gap can slow down the heat conduction between the heat insulation element 30 and the cover 11. Air, as a poor conductor of heat, fills the heat conduction path between the heat insulation element 30 and the cover 11, forming an additional heat insulation buffer layer, creating multiple obstacles and weakening heat transfer.

[0207] Of course, in other embodiments, the heat insulation element 30 and the cover 11 can be attached together, which facilitates the assembly of the heat insulation element 30 and the cover 11 and helps to improve the assembly efficiency of the battery device 200.

[0208] In some embodiments, the cover 11 is provided with a first mounting portion 112 on the side facing the receiving cavity 1001, and the heat insulation member 30 is provided with a second mounting portion 31, with the first mounting portion 112 connected to the second mounting portion 31.

[0209] After the first mounting part 112 is connected to the second mounting part 31, a stable physical connection can be formed between the cover 11 and the heat insulation component 30, reducing the displacement and loosening of the heat insulation component 30 during the long-term use of the housing 10, so that the heat insulation component 30 can continue to play its heat insulation role.

[0210] In some embodiments, the first mounting part 112 is a mounting post disposed on the cover 11, and the second mounting part 31 is a mounting hole disposed on the heat insulation member 30; or, the first mounting part 112 is a mounting hole disposed on the cover 11, and the second mounting part 31 is a mounting post disposed on the heat insulation member 30; the mounting post passes through the mounting hole and is connected to the corresponding heat insulation member 30 or cover 11.

[0211] Refer to 8 to Figure 12 In this embodiment of the application, the first mounting part 112 is a mounting post provided on the cover 11, and the second mounting part 31 is a mounting hole provided on the heat insulation member 30. The mounting post on the cover 11 passes through the mounting hole of the heat insulation member 30 and is connected to the heat insulation member 30.

[0212] It should be noted that in some embodiments, the mounting post and the mounting hole can be an interference fit, in which case friction is generated between the mounting post and the mounting hole to achieve fixation; in other embodiments, bolts or snap-fit ​​connectors can be used to assist in fixing the heat insulation component to the mounting post; in some embodiments, the mounting post can also be set as a rivet so that the heat insulation component 30 and the cover 11 are riveted and fixed.

[0213] The structure of the mounting posts and mounting holes allows for simultaneous positioning of the relative positions of the heat insulation component 30 and the cover 11 during assembly, greatly simplifying the assembly process and helping to improve the assembly efficiency of the battery device.

[0214] In some embodiments, the mounting post is a riveted component that passes through a mounting hole and is riveted to the corresponding heat insulation component 30 or cover 11.

[0215] Refer to 8 to Figure 12 In this embodiment of the application, the first mounting part 112 is a mounting post provided on the cover 11, and the second mounting part 31 is a mounting hole provided on the heat insulation member 30. The mounting post on the cover 11 passes through the mounting hole of the heat insulation member 30 and is riveted to the heat insulation member 30.

[0216] Riveting is a permanent connection method. By deforming and fixing the mounting post, a high-strength and tight connection structure is formed between the cover 11 and the thermal insulation component 30. Compared with the potential loosening risk of bolted connections or the problem of adhesive failure due to aging over time, riveted connections can withstand long-term vibration, impact, and alternating loads, effectively reducing the risk of the thermal insulation component 30 falling off or shifting. In addition, the riveting process is simple to operate. With specialized riveting equipment, the mounting post can be quickly passed through the mounting hole and riveted, eliminating the need for multiple tightening operations like bolted connections, thus significantly shortening assembly time.

[0217] Figure 13 This is a partial structural diagram of the cover 11 provided in an embodiment of this application.

[0218] Reference Figure 13In some embodiments, the outer periphery of the mounting post is provided with a stepped surface 1121, which abuts against the corresponding heat insulation element 30 or cover 11, so that a gap is formed between the heat insulation element 30 and the cover 11.

[0219] It should be noted that when the mounting post is installed on the cover 11, the diameter of the end of the mounting post facing the cover 11 is greater than the diameter of the end of the mounting post away from the cover 11, so that the stepped surface 1121 can face the heat insulation member 30 and abut against the heat insulation member 30; when the mounting post is installed on the heat insulation member 30, the diameter of the end of the mounting post near the heat insulation member 30 is greater than the diameter of the end of the mounting post away from the heat insulation member 30, so that the stepped surface 1121 can face the cover 11 and abut against the cover 11.

[0220] A stepped surface 1121 is provided on the outer periphery of the mounting post. The stepped surface 1121 abuts against the corresponding heat insulation component 30 or cover 11 to form a contact limit, so that a gap can be formed between the heat insulation component 30 and the cover 11. This can reduce the difficulty of assembly and help improve the assembly efficiency of the battery device 200.

[0221] In some embodiments, when the mounting post is disposed on the cover 11, the mounting post and the cover 11 are integral parts.

[0222] The mounting post and the cover 11 are integrated into one piece, which can improve the connection stability between the mounting post and the cover 11. When subjected to external force, the stress can be transmitted more evenly between the cover 11 and the mounting post, reducing the risk of breakage caused by stress concentration at the connection point, and significantly enhancing the load-bearing capacity of the connection between the cover 11 and the heat insulation component 30.

[0223] In some embodiments, a mounting post is provided on the side of the first base 114 facing the receiving cavity, and the mounting post and the first base 114 are integral parts.

[0224] The one-piece molding process simplifies the manufacturing process, eliminating the need to process and assemble the mounting column and the first base 114 separately, thus reducing assembly processes such as welding and riveting, as well as the investment in corresponding equipment.

[0225] In some embodiments, the mounting post is a polycaprolactam material.

[0226] Polycaprolactam possesses good toughness, which effectively reduces the risk of brittle fracture and failure of the mounting post under external forces. Furthermore, polycaprolactam is a thermoplastic resin, which can be molded through injection molding, extrusion, and compression molding after being heated and melted, thus reducing the difficulty of shaping the mounting post.

[0227] In some embodiments, the thermoplastic properties of the mounting post can be utilized to rivet the mounting post to the insulation member 30 using a hot riveting process. In this way, it is not necessary to use additional materials such as glue to fix the insulation member 30 to the cover 11.

[0228] In some embodiments, the material of the mounting post is the same as that of the first substrate 114, that is, the mounting post and the first substrate 114 are both made of polycaprolactam material, which can reduce the processing difficulty of the cover.

[0229] In some embodiments, the first fiber 115 avoids the mounting post.

[0230] The first fiber body 115 avoids the mounting post, that is, the mounting post does not contain the first fiber body 115. In this way, the difficulty of shaping the mounting post can be reduced.

[0231] The battery device 200 provided in this application embodiment includes a housing 10 and a battery cell 20. The housing 10 includes a main body 12 and a cover 11 connected to the main body 12, forming a receiving cavity 1001 between the main body 12 and the cover 11. The cover 11 is connected to the main body 12 and seals the opening of the receiving cavity 1001. The battery cell 20 is disposed within the receiving cavity 1001. The cover 11 is a continuous fiber reinforced thermoplastic composite material. The cover 11 includes a first matrix 114 and a first fiber body 115 disposed within the first matrix 114. The first matrix 114 is a polycaprolactam material, and the first fiber body 115 includes continuous fibers, including one or more of glass fibers, carbon fibers, or basalt fibers. The mass of the first fiber body 115 accounts for 60% to 80% of the total mass of the cover 11. A reinforcing layer 14 is provided on one side of the cover 11 away from the receiving cavity 1001. The reinforcing layer 14 and the cover 11 are integral. The reinforcing layer 14 includes a second matrix 145 and a second fiber body 146 disposed in the second matrix 145. The second matrix 145 is a polycaprolactam material. The second fiber body 146 includes continuous fibers and / or chopped fibers. The continuous fibers and / or chopped fibers include one or more of glass fibers, carbon fibers, or basalt fibers. The reinforcing layer 14 includes a first segment 141, a second segment 142, and a third segment 143 connected at an angle in sequence. The first segment 141, the second segment 142, and the third segment 143 are combined to form an "H" shape. A groove 111 is provided on the side of the cover 11 facing away from the receiving cavity 1001. The first segment 141, the second segment 142, and the third segment 143 are disposed in the groove 111, and the sides of the first segment 141, the second segment 142, and the third segment 143 are flush with the side of the cover 11 facing away from the receiving cavity 1001. The reinforcing layer 14 also includes a ring portion 144, which is disposed on the edge of the cover 11 and arranged around the central axis of the cover 11. The cover 11 is provided with two first connecting holes 113, one of which penetrates the connection area of ​​the first segment 141 and the second segment 142, and the other of which penetrates the connection area of ​​the second segment 142 and the third segment 143. The tensile strength of the cover 11 in the dry state is 300MPa~550MPa, and the tensile modulus is 15GPa~30GPa. A heat insulation element 30 is provided on the side of the cover 11 facing the receiving cavity 1001, and a mounting post is provided on the side of the cover 11 facing the receiving cavity 1001. The heat insulation element 30 is a mica sheet or foam, and the heat insulation element 30 is provided with mounting holes. The mounting post passes through the mounting holes and is riveted to the heat insulation element 30. The mounting post and the first substrate 114 are integral parts. The mounting post is made of polycaprolactam material, and the first fiber body 115 avoids the mounting post. The first fiber body 115 is not provided inside the mounting post.

[0232] The battery device 200 provided in this application embodiment uses a cover 11 made of continuous fiber reinforced thermoplastic composite material. That is, the cover is made of continuous fiber reinforced thermoplastic composite material. The continuous fibers in the continuous fiber reinforced thermoplastic composite material can improve the strength of the cover 11, reduce the deformation of the cover 11, and improve the structural stability of the housing 10, thereby improving the overall reliability and stability of the battery device. Furthermore, making the cover 11 a continuous fiber reinforced thermoplastic composite material part allows the cover to be thermoplastic, which facilitates the processing of the cover and helps reduce the molding difficulty of the cover.

[0233] A first fiber body 115 is arranged within the first substrate 114 of the cover 11, and the first fiber body 115 includes continuous fibers. Compared with chopped fibers, continuous fibers are longer and can form a continuous "mechanical skeleton". Stress can be directly transmitted along the length of the continuous fibers, reducing stress concentration problems and thus providing stronger support. Therefore, when the cover 11 is subjected to a large external force, the first fiber body 115 can provide support for the cover 11, resist the external force and reduce the deformation of the cover 11, thereby improving the reliability and stability of the battery device 200.

[0234] Another embodiment of this application provides an electrical device including a battery device 200 as provided in any of the above embodiments, the battery device 200 being used to store or provide electrical energy.

[0235] The power device in this embodiment adopts the battery device 200 of the above embodiments, and therefore has at least all the beneficial effects of the battery device 200, which will not be repeated here.

[0236] The descriptions of the various embodiments above tend to emphasize the differences between them. Similarities or commonalities can be referenced interchangeably, and for brevity, will not be repeated here. Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. 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. 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 various 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: The box includes a main body and a cover disposed on the main body, with a receiving cavity formed between the main body and the cover; The battery cell is installed inside the receiving cavity; The cover includes a first matrix and a first fiber body disposed within the first matrix. The first matrix is ​​a thermoplastic material, and the first fiber body includes a plurality of continuous fibers.

2. The battery device as claimed in claim 1, characterized in that, The first matrix is ​​a polycaprolactam material.

3. The battery device as claimed in claim 1, characterized in that, The mass of the first fibrous body accounts for 60% to 80% of the total mass of the cover.

4. The battery device as claimed in claim 1, characterized in that, The first fiber body includes one or more of glass fiber, carbon fiber or basalt fiber.

5. The battery device as claimed in claim 1, characterized in that, The side of the cover is provided with a reinforcing layer.

6. The battery device as claimed in claim 5, characterized in that, The reinforcing layer includes a second matrix and a second fiber body disposed within the second matrix, the second fiber body comprising continuous fibers and / or chopped fibers.

7. The battery device as claimed in claim 6, characterized in that, The second matrix is ​​a polycaprolactam material.

8. The battery device as claimed in claim 6, characterized in that, The first substrate and the second substrate are a single piece.

9. The battery device as claimed in claim 6, characterized in that, An adhesive layer is provided between the first substrate and the second substrate, and the second substrate is bonded to the surface of the first substrate through the adhesive layer.

10. The battery device as claimed in claim 5, characterized in that, The cover has a groove on the side opposite to the receiving cavity, and the reinforcing layer is at least partially disposed in the groove.

11. The battery device as claimed in claim 10, characterized in that, The side of the reinforcing layer facing away from the receiving cavity is flush with the side of the cover facing away from the receiving cavity; or, The reinforcing layer is located within the groove on the side facing away from the receiving cavity.

12. The battery device as claimed in claim 5, characterized in that, The reinforcing layer includes a first segment and a second segment connected to the first segment, wherein the length direction of the second segment is set at an angle to the length direction of the first segment.

13. The battery device as claimed in claim 12, characterized in that, The reinforcing layer also includes a third segment, the length direction of which is set at an angle to the length direction of the second segment, and the two ends of the second segment are respectively connected to the first segment and the third segment.

14. The battery device as claimed in claim 5, characterized in that, The reinforcing layer includes a ring portion disposed at the edge of the cover.

15. The battery device as claimed in claim 5, characterized in that, The cover is provided with a first connecting hole, which penetrates the reinforcing layer and is used for fasteners to pass through.

16. The battery device according to any one of claims 1-15, characterized in that, The tensile strength of the cover is 300 MPa to 550 MPa; and / or, The tensile modulus of the cover is 15 GPa to 30 GPa.

17. The battery device according to any one of claims 1-15, characterized in that, The battery device also includes a heat insulation element disposed on the side of the cover facing the receiving cavity.

18. The battery device as claimed in claim 17, characterized in that, A gap is formed between the heat insulation component and the cover.

19. The battery device as claimed in claim 17, characterized in that, The cover has a first mounting portion on the side facing the receiving cavity, and the heat insulation component has a second mounting portion, with the first mounting portion connected to the second mounting portion.

20. The battery device as claimed in claim 19, characterized in that, The first mounting part is a mounting post disposed on the cover, and the second mounting part is a mounting hole disposed on the heat insulation component; or, the first mounting part is the mounting hole disposed on the cover, and the second mounting part is the mounting post disposed on the heat insulation component; The mounting post passes through the mounting hole and is connected to the corresponding heat insulation element or the cover.

21. The battery device as claimed in claim 20, characterized in that, The outer periphery of the mounting column is provided with a stepped surface, which abuts against the corresponding heat insulation component or the cover, so that a gap is formed between the heat insulation component and the cover.

22. The battery device according to any one of claims 1-15, characterized in that, The first substrate has a mounting post on the side facing the receiving cavity, and the mounting post is an integral part of the first substrate.

23. The battery device as claimed in claim 22, characterized in that, The first fiber body avoids the mounting post.

24. An electrical appliance, characterized in that, Includes a battery device according to any one of claims 1-23, the battery device being used to store or provide electrical energy.

Images