Heat insulation assembly, battery device and power utilization device

Abstract

The utility model discloses a heat insulation assembly, a battery device and a power utilization device, the battery device comprises a plurality of battery monomers and a heat insulation assembly, the plurality of battery monomers are arranged in sequence, and the heat insulation assembly is clamped between two battery monomers along the arrangement direction of the two battery monomers. The heat insulation assembly comprises an outer wrapping insulation layer, a fireproof layer, a fixing frame and a middle heat insulation layer, the fireproof layer and the middle heat insulation layer are stacked in the arrangement direction, the outer wrapping insulation layer wraps the fireproof layer and the middle heat insulation layer, a containing space is formed in the fixing frame, and the fireproof layer and the middle heat insulation layer are located in the containing space. According to the battery device, the battery monomers on the two sides can be subjected to insulation protection through the outer wrapping insulation layer, meanwhile, the fireproof layer and the middle heat insulation layer are wrapped by the outer wrapping insulation layer, the situation that adjacent battery monomers are affected after thermal runaway protection failure of the battery monomers can be improved through the fireproof layer and the middle heat insulation layer, and then the risk that the battery device is on fire is reduced.

Description

Technical Field

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

[0002] Energy conservation and emission reduction are the keys to sustainable development, which has promoted the adjustment of the energy structure and the development and application of battery technology. The development of battery technology depends on electrochemical energy storage technology. Due to its advantages such as high energy density, good cycling ability, high working voltage, environmental friendliness, and low self-discharge, it has been widely used in portable electronics, electric vehicles, and energy storage systems.

[0003] The battery device includes a plurality of battery cells, and a heat insulation pad is disposed between the plurality of battery cells. Heat insulation between the battery cells is achieved through the heat insulation pad. However, the heat insulation pad in the related art has a single function and is difficult to apply to more complex working conditions. Summary of the Utility Model

[0004] The main purpose of the present application is to provide a heat insulation component, a battery device, and an electrical device, aiming to solve the above-mentioned technical problems existing in the prior art.

[0005] To solve the above problems, the present application provides a battery device. The battery device includes a plurality of battery cells and a heat insulation component. The plurality of battery cells are arranged in sequence, and the heat insulation component is clamped between two of the battery cells along the arrangement direction of the two battery cells. The heat insulation component includes an outer insulating layer, a fireproof layer, a fixing frame, and a middle heat insulation layer. The fireproof layer and the middle heat insulation layer are stacked along the arrangement direction, the outer insulating layer covers the fireproof layer and the middle heat insulation layer, the fixing frame forms a receiving space, and the fireproof layer and the middle heat insulation layer are located in the receiving space. Thus, the heat insulation component is clamped between two battery cells, and the heat insulation component includes an outer insulating layer, a fireproof layer, and a middle heat insulation layer. The fireproof layer and the middle heat insulation layer are stacked along the arrangement direction, and the outer insulating layer covers the fireproof layer and the middle heat insulation layer, so that the outer insulating layer can provide insulation protection for the battery cells on both sides. At the same time, the fireproof layer and the middle heat insulation layer are covered by the outer insulating layer, which can improve the influence on adjacent battery cells after the failure of the thermal runaway protection of the battery cells through the fireproof layer and the middle heat insulation layer, thereby reducing the risk of fire of the battery device. In addition, the fixing frame forms a receiving space, and the fireproof layer and the middle heat insulation layer are located in the receiving space, which is convenient for installing and fixing the fireproof layer and the middle heat insulation layer through the fixing frame, reducing the molding difficulty of the heat insulation component, and improving the production efficiency.

[0006] In some embodiments, the heat insulation component further includes a buffer heat insulation layer, which is sandwiched between the middle heat insulation layer and the fireproof layer in the arrangement direction; or the fireproof layer is sandwiched between the middle heat insulation layer and the buffer heat insulation layer in the arrangement direction. Thus, the buffer heat insulation layer can further enhance the heat insulation effect of the heat insulation component. When the buffer heat insulation layer is sandwiched between the middle heat insulation layer and the fireproof layer, it can improve the heat insulation effect of the heat insulation component while reducing the influence of the buffer heat insulation layer on the fireproof layer. Or when the fireproof layer is sandwiched between the middle heat insulation layer and the buffer heat insulation layer in the arrangement direction, it can improve the heat insulation effect of the heat insulation component while improving the buffering performance of the heat insulation component.

[0007] In some embodiments, the buffer heat insulation layer includes a phase change material layer. Thus, the buffer heat insulation layer including the phase change material layer can achieve the buffering and heat insulation performance of the buffer heat insulation layer through a simple structure, thereby improving the buffer heat insulation performance of the heat insulation component.

[0008] In some embodiments, the heat insulation component further includes a nano material layer, and the nano material layer is located between the buffer heat insulation layer and the middle heat insulation layer in the arrangement direction. Thus, the high thermal conductivity characteristic of the nano material layer can be used to further improve the heat insulation efficiency of the heat insulation component. And the nano material layer is located between the buffer heat insulation layer and the middle heat insulation layer in the arrangement direction, and the buffer heat insulation layer and the middle heat insulation layer can also provide good buffering protection for the nano material layer, reducing the risk of damage to the nano material layer.

[0009] In some embodiments, the heat insulation component further includes a nano material layer, and the buffer heat insulation layer covers the nano material layer. Thus, the buffer heat insulation layer covering the nano material layer can play a better buffering and protecting role for the nano material layer, further reducing the risk of damage to the nano material layer.

[0010] In some embodiments, the numbers of both the buffer heat insulation layer and the fireproof layer are at least two layers, and each side of the middle heat insulation layer in the arrangement direction has at least one layer of the buffer heat insulation layer and one layer of the fireproof layer. Thus, the numbers of both the buffer heat insulation layer and the fireproof layer are at least two layers, and each side of the middle heat insulation layer in the arrangement direction has at least one layer of the buffer heat insulation layer and one layer of the fireproof layer, which can enable the heat insulation component to have a double-layer fireproof and heat insulation effect, further improving the heat insulation effect of the heat insulation component and the buffering performance of the heat insulation component.

[0011] In some embodiments, the middle heat insulation layer includes a ceramic aerogel layer, and the fireproof layer includes a mica layer or a ceramic layer. Thus, the middle heat insulation layer including the ceramic aerogel layer and the fireproof layer including the mica layer or the ceramic layer can achieve the heat insulation performance of the middle heat insulation layer through a simple structure, and achieve the fireproof performance of the fireproof layer through a simple structure.

[0012] In some embodiments, the fireproof layer and the middle heat-insulating layer are connected to the inner side wall of the fixed frame, and the outer insulating layer covers the fireproof layer, the middle heat-insulating layer, and the fixed frame. Thus, the outer insulating layer covers the fireproof layer, the middle heat-insulating layer, and the fixed frame at the same time, enabling the integration of the fireproof layer, the middle heat-insulating layer, and the fixed frame through the outer insulating layer, which is more conducive to reducing the molding difficulty of the heat-insulating component and improving the production efficiency.

[0013] In some embodiments, the outer insulating layer covers the fireproof layer and the middle heat-insulating layer within the accommodating space, and the outer insulating layer is connected to the inner side wall of the fixed frame. Thus, the outer insulating layer covers the fireproof layer and the middle heat-insulating layer within the accommodating space, and the outer insulating layer is connected to the inner side wall of the fixed frame, enabling the fireproof layer, the middle heat-insulating layer, and the outer insulating layer to be regarded as an integral heat-insulating unit installed within the accommodating space, facilitating the replacement, recycling, etc. of the fireproof layer, the middle heat-insulating layer, and the outer insulating layer.

[0014] In some embodiments, the fixed frame includes two rigid frame bars and two flexible frame bars. The two rigid frame bars are arranged relatively spaced apart, and the two flexible frame bars are arranged opposite to and spaced apart from each other. Thus, the two rigid frame bars are arranged relatively spaced apart, and the two flexible frame bars are arranged opposite to and spaced apart from each other, enabling the buffering performance of the heat-insulating component to be improved through the flexible frame bars, facilitating the better installation of the heat-insulating component between two battery cells, and alleviating the risk of excessive deformation of the flexible frame due to extrusion through the rigid frame bars.

[0015] In some embodiments, the heat-insulating component further includes two adhesive layers. The two adhesive layers are located on the opposite side surfaces of the outer insulating layer in the arrangement direction, and the heat-insulating component is adhesively bonded to the two battery cells through the two adhesive layers. Thus, the two adhesive layers are located on the opposite side surfaces of the outer insulating layer in the arrangement direction, facilitating the adhesive bonding of the heat-insulating component to the two battery cells through the two adhesive layers and improving the installation efficiency of the heat-insulating component, etc.

[0016] To solve the above problems, the present application provides a heat insulation component, which is used to be clamped between two battery cells along the arrangement direction of the two battery cells. The heat insulation component includes an outer insulating layer, a fireproof layer, a fixing frame and a middle heat insulation layer. The fireproof layer and the middle heat insulation layer are stacked along the arrangement direction. The outer insulating layer covers the fireproof layer and the middle heat insulation layer. The fixing frame forms an accommodating space, and the fireproof layer and the middle heat insulation layer are located in the accommodating space. Thus, the heat insulation component is clamped between two battery cells, and the heat insulation component includes an outer insulating layer, a fireproof layer and a middle heat insulation layer. The fireproof layer and the middle heat insulation layer are stacked along the arrangement direction, and the outer insulating layer covers the fireproof layer and the middle heat insulation layer, which can provide insulation protection for the battery cells on both sides through the outer insulating layer. At the same time, the fireproof layer and the middle heat insulation layer are covered by the outer insulating layer, which can improve the influence on adjacent battery cells after the thermal runaway protection of the battery cell fails through the fireproof layer and the middle heat insulation layer, thereby reducing the risk of fire of the battery device. At the same time, the fixing frame forms an accommodating space, and the fireproof layer and the middle heat insulation layer are located in the accommodating space, which is convenient for installing and fixing the fireproof layer and the middle heat insulation layer through the fixing frame, reducing the molding difficulty of the heat insulation component and improving the production efficiency.

[0017] To solve the above problems, the present application provides an electrical device, which includes the battery cell as described above or the heat insulation component as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 is a schematic structural diagram of a vehicle according to one or more embodiments;

[0020] Figure 2 is an exploded structural diagram of a battery device according to one or more embodiments;

[0021] Figure 3 is a disassembled structural diagram of a battery cell and a heat insulation component according to one or more embodiments;

[0022] Figure 4 is a first structural diagram of a heat insulation component according to one or more embodiments of the present application;

[0023] Figure 5 is Figure 4 the first sectional structural diagram of the heat insulation component shown along the A-A direction;

[0024] Figure 6 is Figure 4 The second sectional view of the heat insulation component shown in the direction of A-A;

[0025] Figure 7 is Figure 4 The third sectional view of the heat insulation component shown in the direction of A-A;

[0026] Figure 8 is Figure 4 The fourth sectional view of the heat insulation component shown in the direction of A-A;

[0027] Figure 9 The second schematic view of the heat insulation component according to one or more embodiments of the present application;

[0028] Figure 10 The third schematic view of the heat insulation component according to one or more embodiments of the present application;

[0029] Figure 11 is Figure 10 The sectional view of the heat insulation component shown in the direction of B-B.

[0030] Reference numerals in the drawings: vehicle 1; battery device 2; controller 3; motor 4; heat insulation component 10; middle heat insulation layer 100; fireproof layer 200; outer insulation layer 300; buffer heat insulation layer 400; nanomaterial layer 500; fixed frame 600; rigid frame bar 610; soft frame bar 620; accommodation space 630; adhesive layer 700; battery cell 20; box body 30; first part 31; second part 32. Detailed implementation manners

[0031] Hereinafter, embodiments of the technical solution of the present application will be described in detail with reference to the drawings. The following embodiments are only used to illustrate the technical solution of the present application more clearly, and therefore are only examples and cannot be used to limit the protection scope of the present application.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0033] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects, and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity, specific order, or primary-secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is more than two, unless otherwise specifically and clearly defined.

[0034] Reference to "embodiments" in this text means that the specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0035] In the description of the embodiments of the present application, the term "and / or" is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this text generally represents an "or" relationship between the associated objects before and after.

[0036] In the description of the embodiments of the present application, the term "a plurality of" means more than two (including two). Similarly, "a plurality of groups" means more than two groups (including two groups), and "a plurality of pieces" means more than two pieces (including two pieces).

[0037] In the description of the embodiments of the present application, technical terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the embodiments of the present application.

[0038] In the description of the embodiments of the present application, unless otherwise clearly specified and defined, technical terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0039] At present, from the perspective of the development of the market situation, the application of batteries is becoming more and more extensive. Batteries 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 transportation means such as electric bicycles, electric motorcycles, and electric vehicles, as well as in many fields such as aerospace. With the continuous expansion of the application fields of batteries, the market demand is also constantly increasing.

[0040] The battery device includes a plurality of battery cells, and a heat insulation pad is provided between the plurality of battery cells. Heat insulation between the battery cells is achieved through the heat insulation pad. However, the heat insulation pad in the related art usually has a single function and is difficult to apply to more complex working conditions.

[0041] To solve the technical problems existing in the related art, the present application provides a heat insulation component, a battery device, and an electrical device. The battery device includes a plurality of battery cells and a heat insulation component. The heat insulation component is provided between the plurality of battery cells. The heat insulation component includes an outer insulating layer, a fireproof layer, and a middle heat insulation layer. The outer insulating layer covers the middle heat insulation layer and the fireproof layer, and can provide insulation protection for the battery cells on both sides through the outer insulating layer. At the same time, the fireproof layer and the middle heat insulation layer are covered by the outer insulating layer, and can improve the influence on adjacent battery cells after the thermal runaway protection of the battery cells fails through the fireproof layer and the heat insulation layer, thereby reducing the risk of the battery device catching fire.

[0042] Specifically, the present application provides an electrical device, which may include, but is not limited to, mobile phones, tablets, laptop computers, electric toys, electric tools, battery cars, electric vehicles, ships, spacecraft, and the like. Among them, the electric toys may include fixed or mobile electric toys, such as game consoles, electric vehicle toys, electric ship toys, and electric aircraft toys, etc. The spacecraft may include airplanes, rockets, space shuttles, and spaceships, etc. Among them, the electrical device may include a battery, and the electrical device can provide electrical energy through the battery to achieve corresponding functions.

[0043] The present application also provides an electric vehicle, which may include a battery device.

[0044] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of a vehicle according to one or more embodiments.

[0045] Vehicle 1 can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, an extended-range vehicle, etc. A battery device 2 is disposed inside vehicle 1. The battery device 2 can be disposed at the bottom, the head, or the tail of vehicle 1. The battery device 2 can be used to supply power to vehicle 1. For example, the battery device 2 can serve as the operating power source of vehicle 1. Vehicle 1 may further include a controller 3 and a motor 4. The controller 3 is used to control the battery device 2 to supply power to the motor 4. For example, it is used for the working power requirements during the start, navigation, and driving of vehicle 1.

[0046] In some embodiments of the present application, the battery device 2 can not only serve as the operating power source of vehicle 1, but also serve as the driving power source of vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for vehicle 1.

[0047] To improve the performance of the electrical device, the present application also provides a battery device. Refer to Figure 2 , Figure 2 which is an exploded structural schematic diagram of the battery device according to one or more embodiments.

[0048] The shape of the battery device can include, but is not limited to, square, cylindrical, or any other arbitrary shape.

[0049] In some embodiments, the battery device 2 may include a box body 30 and battery cells 20. The battery cells 20 are accommodated in the box body 30. The box body 30 is used to provide a accommodation space 630 for the battery cells 20. The box body 30 can adopt various structures. In some embodiments, the box body 30 may include a first part 31 and a second part 32. The first part 31 and the second part 32 cover each other. The first part 31 and the second part 32 jointly define the accommodation space 630 for accommodating the battery cells 20. The second part 32 can be a hollow structure with one end open. The first part 31 can be a plate-like structure. The first part 31 covers the open side of the second part 32 so that the first part 31 and the second part 32 jointly define the accommodation space 630. The first part 31 and the second part 32 can also both be hollow structures with one side open, and the open side of the first part 31 covers the open side of the second part 32.

[0050] In the battery device 2, there may be multiple battery cells 20. The multiple battery cells 20 can be connected in series, parallel, or in a combined series-parallel connection. A combined series-parallel connection means that there are both series and parallel connections among the multiple battery cells 20. The multiple battery cells 20 can be directly connected in series, parallel, or in a combined series-parallel connection together, and then the whole formed by the multiple battery cells 20 is accommodated in the box body 30. Of course, the battery device 2 can also be such that multiple battery cells 20 are first connected in series, parallel, or in a combined series-parallel connection to form a battery module, and then multiple battery modules are connected in series, parallel, or in a combined series-parallel connection to form a whole and are accommodated in the box body 30. The battery device 2 can also include other structures. For example, the battery device 2 can also include a busbar component for realizing the electrical connection among the multiple battery cells 20.

[0051] The manufacturing methods of the battery cell 20 include the stacking type and the winding type, that is, the battery cell 20 is divided into two types: the stacked battery and the wound battery. The stacked battery has a uniform current collection effect, a smaller internal resistance of the battery, and a large specific power. However, in order to improve the accuracy, the requirement for the mold accuracy is extremely high, the equipment investment is high, and the process is relatively complex, resulting in low production efficiency. The wound battery is simple to manufacture, and the requirements for the equipment accuracy in the processes of making the battery plates and assembling are general, with high production efficiency and low cost. In terms of performance, the wound battery has excellent high and low temperature performance, can be charged very quickly, has an extremely long service life, a stable high output voltage, and a strong and earthquake-resistant structure.

[0052] Combined Figures 3 to 5 , Figure 3 is a schematic diagram of the disassembly structure of the battery cell and the heat insulation component according to one or more embodiments; Figure 4 is a first schematic diagram of the heat insulation component according to one or more embodiments of the present application; Figure 5 is Figure 4 the first sectional structure schematic diagram of the heat insulation component shown along the A-A direction.

[0053] The battery device 2 includes multiple battery cells 20 and a heat insulation component 10. The multiple battery cells 20 are arranged in sequence, and the heat insulation component 10 is clamped between two battery cells 20 along the arrangement direction of the two battery cells 20. The heat insulation component 10 includes an outer insulating layer 300, a fireproof layer 200, and a middle heat insulation layer 100. The fireproof layer 200 and the middle heat insulation layer 100 are stacked along the arrangement direction, and the outer insulating layer 300 covers the fireproof layer 200 and the middle heat insulation layer 100.

[0054] The battery cell 20 refers to the smallest unit that makes up the battery device 2. The battery cell 20 may include a housing, an electrode assembly, and other functional components. The housing includes an end cap and a casing. The end cap refers to a component that covers the opening of the casing to isolate the internal environment of the battery cell 20 from the external environment. Without limitation, the shape of the end cap may be adapted to the shape of the casing to fit the casing. Optionally, the end cap may be made of a material with a certain hardness and strength (such as aluminum alloy). In this way, the end cap is not easily deformed when subjected to extrusion and collision, enabling the battery cell 20 to have higher structural strength and improved safety performance. Functional components such as electrode terminals may be provided on the end cap. The electrode terminals may be used to electrically connect to the electrode assembly for outputting or inputting the electrical energy of the battery cell 20. In some embodiments, the electrode terminals may include pole columns. The pole columns may include a positive pole column and a negative pole column for current output and connection to an external circuit. In some embodiments, an explosion-proof component for releasing the internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold may also be provided on the end cap. The material of the end cap may also be diverse. For example, the material of the end cap includes but is not limited to copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. In some embodiments, an insulating component may also be provided on the inner side of the end cap. The insulating component may be used to isolate the electrical connection components inside the casing from the end cap to reduce the risk of short circuit. Exemplarily, the insulating component may be plastic, rubber, etc. The casing is a component used to cooperate with the end cap to form the internal environment of the battery cell 20. Among them, the formed internal environment may be used to accommodate the electrode assembly, electrolyte, and other components. The casing and the end cap may be independent components. An opening may be provided on the casing, and the end cap covers the opening at the opening to form the internal environment of the battery cell 20. Without limitation, the end cap and the casing may also be integrated. Specifically, the end cap and the casing may first form a common connection surface before other components are inserted into the casing. When it is necessary to encapsulate the inside of the casing, the end cap is then used to cover the casing. The casing may be of various shapes and sizes, such as rectangular parallelepiped shape, cylindrical shape, hexagonal prism shape, etc. Specifically, the shape of the casing may be determined according to the specific shape and size of the electrode assembly. The material of the casing may be diverse. For example, the material of the casing includes but is not limited to copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0055] Multiple battery cells 20 can be regularly arranged in a multi-row and multi-column structure, and the heat insulation component 10 is interposed between two battery cells 20. Exemplarily, the battery cell 20 is a square shell battery cell 20. The battery cell 20 has four sides, two opposite first surfaces in the thickness direction of the battery cell 20, and two opposite second surfaces in the length direction of the battery cell 20. The area of the first surface is larger than that of the second surface, that is, the first surface serves as the large surface of the battery cell 20, and the second surface serves as the small surface of the battery cell 20. The arrangement direction of the multiple battery cells 20 can be understood as the direction perpendicular to the first surface of the battery cell 20. The heat insulation component 10 is interposed between the two large surfaces of the battery cell 20, and the contact area between two adjacent battery cells 20 can be reduced through the heat insulation component 10.

[0056] The outer insulating layer 300 can be made of a good insulating material. Exemplarily, the outer insulating film can include, but is not limited to, organic films or fabric films, etc. The organic film can include, but is not limited to, PET film, PEN film, PI film, PC film, PE film, PVC film or PTFE film. The fabric film can include, but is not limited to, glass fiber cloth, high-silica glass fiber cloth, ceramic fiber cloth or non-woven fabric. The fireproof layer 200 can be made of a good fireproof material. For example, the fireproof layer 200 can include organic fireproof materials, inorganic fireproof materials, composite fireproof materials or new fireproof materials, etc. The middle heat insulation layer 100 can be made of a material with better heat insulation effect. Exemplarily, the middle heat insulation layer 100 can include, but is not limited to, any one of wet fiber felts containing aerogel, needle-punched fiber felts, foams, foams, non-woven fabrics, resin composite sheets, or can also choose any one of wet fiber felts, needle-punched fiber felts, foams, non-woven fabrics, hollow microsphere resin composite boards, foams, nanofiber boards, mica boards with good heat insulation and no aerogel. The fireproof layer 200 and the middle heat insulation layer 100 are stacked along the arrangement direction of the battery cell 20, and the outer insulating layer 300 covers the fireproof layer 200 and the outer insulating layer 300 at the same time, so that the heat insulation component 10 can play the roles of fire prevention, heat insulation and insulation at the same time.

[0057] Through the above embodiments, the heat insulation component 10 is interposed between two battery cells 20, and the heat insulation component 10 includes an outer insulating layer 300, a fireproof layer 200 and a middle heat insulation layer 100. The fireproof layer 200 and the middle heat insulation layer 100 are stacked along the arrangement direction, and the outer insulating layer 300 covers the fireproof layer 200 and the middle heat insulation layer 100. The outer insulating layer 300 can provide insulation protection for the battery cells 20 on both sides. At the same time, the fireproof layer 200 and the middle heat insulation layer 100 are covered by the outer insulating layer 300, and the influence of the battery cell 20 after the thermal runaway protection fails on the adjacent battery cells 20 can be improved through the fireproof layer 200 and the middle heat insulation layer 100, thereby reducing the risk of the battery device 2 catching fire.

[0058] Furthermore, the middle heat insulation layer 100 includes a ceramic aerogel layer, and the fireproof layer 200 includes a mica layer or a ceramic layer. The ceramic aerogel layer may include, but is not limited to, an oxide ceramic aerogel layer, a non-oxide ceramic aerogel layer, and a composite ceramic aerogel layer. The ceramic aerogel layer has high temperature resistance characteristics and high-efficiency heat insulation characteristics. The mica layer may include, but is not limited to, a natural mica layer and a synthetic mica layer. The ceramic layer may include, but is not limited to, an oxide ceramic layer, a carbide ceramic layer, a nitride ceramic layer, a boride ceramic layer, etc. The mica layer and the ceramic layer have good fireproof and insulation characteristics. Among them, the middle heat insulation layer 100 includes a ceramic aerogel layer, and the fireproof layer 200 includes a mica layer or a ceramic layer, which can achieve the heat insulation performance of the middle heat insulation layer 100 through a simple structure and the fireproof performance of the fireproof layer 200 through a simple structure.

[0059] See Figure 6 and Figure 7 , Figure 6 is Figure 4 the second sectional structure schematic diagram of the heat insulation component 10 shown in Figure 7 is Figure 4 the third sectional structure schematic diagram of the heat insulation component 10 shown in along the A-A direction.

[0060] The heat insulation component 10 further includes a buffer heat insulation layer 400. The buffer heat insulation layer 400 is clamped between the middle heat insulation layer 100 and the fireproof layer 200 in the arrangement direction; or the fireproof layer 200 is clamped between the middle heat insulation layer 100 and the buffer heat insulation layer 400 in the arrangement direction. The buffer heat insulation layer 400 has heat insulation and buffering characteristics, and the buffer heat insulation layer 400 can further enhance the heat insulation effect of the heat insulation component 10. In some embodiments, the buffering performance of the buffer heat insulation layer 400 may be stronger than that of the middle heat insulation layer 100, and the heat insulation performance of the middle heat insulation layer 100 may be stronger than that of the buffer heat insulation layer 400. As Figure 6 shown, in some application scenarios, clamping the buffer heat insulation layer 400 between the middle heat insulation layer 100 and the fireproof layer 200 in the arrangement direction can make the fireproof layer 200 located outside relative to the buffer heat insulation layer 400, while improving the heat insulation effect of the heat insulation component 10 and reducing the influence of the buffer heat insulation layer 400 on the fireproof layer 200. As Figure 7 shown, in some application scenarios, clamping the fireproof layer 200 between the middle heat insulation layer 100 and the buffer heat insulation layer 400 in the arrangement direction can make the buffer heat insulation layer 400 located outside relative to the fireproof layer 200, while improving the heat insulation effect of the heat insulation component 10 and improving the buffering performance of the heat insulation component 10.

[0061] Furthermore, the buffer thermal insulation layer 400 includes a phase change material layer. That is, the material of the buffer thermal insulation layer 400 mainly includes a phase change material, which can utilize the characteristics of the phase change material to achieve the buffering and thermal insulation performance of the buffer thermal insulation layer 400, thereby improving the buffer thermal insulation performance of the thermal insulation component 10.

[0062] See Figure 8 , Figure 8 is Figure 4 the fourth sectional structure schematic diagram of the thermal insulation component 10 along the A-A direction as shown.

[0063] The thermal insulation component 10 includes a nanomaterial layer 500, and the nanomaterial layer 500 is located between the buffer thermal insulation layer 400 and the middle thermal insulation layer 100 in the arrangement direction. The nanomaterial layer 500 can include, but is not limited to, a metal nanomaterial layer 500, a carbon-based nanomaterial layer 500, an oxide nanomaterial layer 500, a polymer nanomaterial layer 500, a composite nanomaterial layer 500, etc. The thermal insulation component 10 includes the nanomaterial layer 500, which can further improve the thermal insulation efficiency of the thermal insulation component 10 through the high thermal conductivity characteristics of the nanomaterial layer 500. And the nanomaterial layer 500 is located between the buffer thermal insulation layer 400 and the middle thermal insulation layer 100 in the arrangement direction, and can also provide good buffering protection for the nanomaterial layer 500 through the buffer thermal insulation layer 400 and the middle thermal insulation layer 100, reducing the risk of damage to the nanomaterial layer 500.

[0064] In some embodiments, the thermal insulation component 10 further includes a nanomaterial layer 500, and the buffer thermal insulation layer 400 covers the nanomaterial layer 500. In this embodiment, the buffer thermal insulation layer 400 covering the nanomaterial layer 500 can be understood as that a sealed space is formed inside the buffer thermal insulation layer 400, and the nanomaterial layer 500 is located in this sealed space, and thus each surface of the nanomaterial layer 500 can be covered by the buffer thermal insulation layer 400. Or the buffer thermal insulation layer 400 covering the nanomaterial layer 500 can also be understood as that the buffer thermal insulation layer 400 is two layers, the nanomaterial layer 500 is located between the two buffer thermal insulation layers 400 in the arrangement direction, and the two buffer thermal insulation layers 400 and the nanomaterial layer 500 are all located between the fireproof layer 200 and the middle thermal insulation layer 100. Thereby, the buffer thermal insulation layer 400 can provide better buffering protection for the nanomaterial layer 500, further reducing the risk of damage to the nanomaterial layer 500.

[0065] In some embodiments, the number of the buffer heat insulation layers 400 and the fireproof layers 200 is at least two. On each side of the middle heat insulation layer 100 in the arrangement direction, there is at least one buffer heat insulation layer 400 and one fireproof layer 200. The middle heat insulation layer 100 has two opposite side surfaces in the arrangement direction, and each side surface has at least a buffer heat insulation layer 400 and a fireproof layer 200, and the structures of the two opposite side surfaces of the middle heat insulation layer 100 may be the same or different. For example, the layers on both sides of the middle heat insulation layer 100 may only include a buffer heat insulation layer 400 and a fireproof layer 200, or only one side of the middle heat insulation layer 100 includes a buffer heat insulation layer 400 and a fireproof layer 200, and the other side includes a buffer heat insulation layer 400, a fireproof layer 200 and a nanomaterial layer 500 at the same time, or the layers on both sides of the middle heat insulation layer 100 may include a buffer heat insulation layer 400, a fireproof layer 200 or a nanomaterial layer 500, etc. The arrangement manners of the layers on both sides of the middle heat insulation layer 100 may be the same or different. For example, the arrangement manners of the layers on both sides of the middle heat insulation layer 100 may be that the nanomaterial layer 500, the buffer heat insulation layer 400 and the fireproof layer 200 are stacked in sequence along the arrangement direction. Another example is that the arrangement manner of the layers on one side of the middle heat insulation layer 100 is that the nanomaterial layer 500, the buffer heat insulation layer 400 and the fireproof layer 200 are stacked in sequence along the arrangement direction, and the arrangement manner of the layers on the other side is that the fireproof layer 200, the nanomaterial layer 500 and the buffer heat insulation layer 400. Thus, the number of the buffer heat insulation layers 400 and the fireproof layers 200 is at least two, and on each side of the middle heat insulation layer 100 in the arrangement direction, there is at least one buffer heat insulation layer 400 and one fireproof layer 200, which can enable the heat insulation assembly 10 to have the effects of double-layer fire protection and heat insulation, and further improve the heat insulation effect of the heat insulation assembly 10 and the buffer performance of the heat insulation assembly 10.

[0066] In some embodiments, the heat insulation assembly 10 further includes two adhesive layers 700. The two adhesive layers 700 are located on the two opposite side surfaces of the outer insulating layer 300 in the arrangement direction. The heat insulation assembly 10 is adhesively bonded to the two battery monomers 20 through the two adhesive layers 700. The adhesive layer 700 may include, but is not limited to, double-sided adhesive. One adhesive layer 700 is adhesively bonded between one side surface of the outer insulating layer 300 and one battery monomer 20 at the same time, and the other adhesive layer 700 is adhesively bonded between the other side surface of the outer insulating layer 300 and the other battery monomer 20 at the same time. When the heat insulation assembly 10 is not yet clamped between the two battery monomers 20, the heat insulation assembly 10 may further include two release paper layers. Each release paper layer is adhesively fixed to the side of one adhesive layer 700 facing away from the outer insulating layer 300. When it is necessary to fix the heat insulation assembly 10 between the two battery monomers 20, the release paper layers can be torn off first, and then the heat insulation assembly 10 is adhesively bonded between the two battery monomers 20 through the two adhesive layers 700.

[0067] See Figure 9 , Figure 9It is a second structural schematic diagram of the heat insulation component 10 according to one or more embodiments of the present application.

[0068] The heat insulation component 10 includes a fixed frame 600, and the fixed frame 600 is formed with an accommodation space 630. The fireproof layer 200 and the middle heat insulation layer 100 are located in the accommodation space 630. The shape of the fixed frame 600 can be set according to the actual situation. For example, the fixed frame 600 can include, but is not limited to, a circular ring frame or a polygonal ring fixed frame 600. The fixed frame 600 is in a shape of a double-square frame to surround and form the accommodation space 630. The fireproof layer 200 and the middle heat insulation layer 100 can be fixed in the accommodation space 630 by means of bonding with the fixed frame 600, etc. When the heat insulation component 10 is clamped between two battery cells 20, the fixed frame 600 can be supported between the two battery cells 20 to relieve the excessive extrusion of the two battery cells 20 on the heat insulation component 10 and damage other hierarchical structures inside the heat insulation component 10. Thus, the fixed frame 600 is formed with an accommodation space 630, and the fireproof layer 200 and the middle heat insulation layer 100 are located in the accommodation space 630, which is convenient for installing and fixing the fireproof layer 200 and the middle heat insulation layer 100 through the fixed frame 600, reducing the forming difficulty of the heat insulation component 10 and improving the production efficiency.

[0069] Further, the fixing frame 600 includes two rigid frame bars 610 and two soft frame bars 620. The two rigid frame bars 610 are arranged relatively spaced apart, and the two soft frame bars 620 are arranged opposite and spaced apart. The two rigid frame bars 610 and the two soft frame bars 620 are connected end to end to form a rectangular frame-shaped fixing frame 600 structure. The length of the two rigid frame bars 610 can be greater than the length of the two soft frame bars 620. When the heat insulation component 10 is clamped between the two battery cells 20, the two rigid frame bars 610 can be clamped on the two edges of the battery cell 20 in the height direction, and the two soft frame bars 620 can be clamped on the two edges of the battery cell 20 in the width direction. The hardness of the rigid frame bar 610 is greater than that of the soft frame bar 620. For example, the rigid frame bar 610 can include but is not limited to a rigid rubber strip, and the soft frame bar 620 can include but is not limited to modified polypropylene (MPP). The soft frame bar 620 can be deformed under the action of extrusion force. After the fixing frame 600 is fixed between the two battery cells 20, the soft frame body can play a better buffering role in the expansion of the battery cell 20. The two ends of one rigid frame bar 610 are respectively connected to one end of the two soft frame bars 620, which can improve the risk that the soft frame bar 620 is extruded between the two battery cells 20 after the battery cell 20 expands through the rigid frame bar 610. Thus, the two rigid frame bars 610 are arranged relatively spaced apart, and the two soft frame bars 620 are arranged opposite and spaced apart, which can improve the buffering performance of the heat insulation component 10 through the soft frame bar 620, facilitate the better installation of the heat insulation component 10 between the two battery cells 20, and relieve the risk of excessive deformation of the soft frame due to extrusion through the rigid frame bar 610.

[0070] In some embodiments, the outer insulating layer 300 wraps the fireproof layer 200 and the middle heat insulation layer 100 in the accommodation space 630, and the outer insulating layer 300 is connected to the inner side wall of the fixing frame 600. The outer insulating layer 300 wraps the fireproof layer 200 and the middle heat insulation layer 100 in the accommodation space 630, which can make the outer insulating layer 300, the fireproof layer 200 and the middle heat insulation layer 100 regarded as an integral structure. This integral structure is installed in the accommodation space 630 as the heat insulation main component of the heat insulation component 10. For example, the outer insulating layer 300 and the inner side wall of the fixing frame 600 can be adhesively fixed, which can make the fireproof layer 200, the middle heat insulation layer 100 and the outer insulating layer 300 regarded as a heat insulation integral and installed in the accommodation space 630 through the outer insulating layer 300, facilitating the replacement and recycling of the fireproof layer 200, the middle heat insulation layer 100 and the outer insulating layer 300.

[0071] See Figure 10 and Figure 11 , Figure 10 is the third schematic structural diagram of the heat insulation component 10 according to one or more embodiments of the present application;Figure 11 Yes Figure 10 It is a schematic cross-sectional structure diagram of the heat insulation component 10 shown in the B-B direction.

[0072] The fireproof layer 200 and the middle heat insulation layer 100 are connected to the inner side wall of the fixed frame 600, and the outer insulation layer 300 wraps the fireproof layer 200, the middle heat insulation layer 100 and the fixed frame 600. The fireproof layer 200 and the middle heat insulation layer 100 can be regarded as a whole and connected to the inner side wall of the fixed frame 600, and the outer insulation layer 300 is simultaneously wrapped on the outer sides of the fireproof layer 200, the middle heat insulation layer 100 and the fixed frame 600. Thus, the outer insulation layer 300 simultaneously wraps the fireproof layer 200, the middle heat insulation layer 100 and the fixed frame 600, and the fireproof layer 200, the middle heat insulation layer 100 and the fixed frame 600 can be integrally arranged through the outer insulation layer 300, which is more conducive to reducing the molding difficulty of the heat insulation component 10 and improving the production efficiency.

[0073] In summary, the heat insulation component 10 is clamped between two battery cells 20, and the heat insulation component 10 includes an outer insulation layer 300, a fireproof layer 200 and a middle heat insulation layer 100. The fireproof layer 200 and the middle heat insulation layer 100 are stacked along the arrangement direction, and the outer insulation layer 300 wraps the fireproof layer 200 and the middle heat insulation layer 100. It can provide insulation protection for the battery cells 20 on both sides through the outer insulation layer 300. At the same time, the fireproof layer 200 and the middle heat insulation layer 100 are wrapped by the outer insulation layer 300, and it can prevent the influence on adjacent battery cells 20 after the thermal runaway protection of the battery cell 20 fails through the fireproof layer 200 and the middle heat insulation layer 100, thereby reducing the risk of the battery device 2 catching fire.

[0074] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered by the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, The battery device includes: a plurality of battery cells, and the plurality of battery cells are arranged in sequence; a heat insulation component, which is clamped between two of the battery cells along the arrangement direction of the two battery cells. The heat insulation component includes an outer insulating layer, a fireproof layer, a fixing frame, and a middle heat insulation layer. The fireproof layer and the middle heat insulation layer are stacked along the arrangement direction. The outer insulating layer covers the fireproof layer and the middle heat insulation layer. The fixing frame forms a receiving space, and the fireproof layer and the middle heat insulation layer are located in the receiving space.

2. The battery device according to claim 1, characterized in that, The heat insulation component further includes a buffer heat insulation layer, and the buffer heat insulation layer is clamped between the middle heat insulation layer and the fireproof layer in the arrangement direction; or the fireproof layer is clamped between the middle heat insulation layer and the buffer heat insulation layer in the arrangement direction.

3. The battery device according to claim 2, characterized in that, The buffer heat insulation layer includes a phase change material layer.

4. The battery device according to claim 2, wherein, The heat insulation component further includes a nanomaterial layer, and the nanomaterial layer is located between the buffer heat insulation layer and the middle heat insulation layer in the arrangement direction.

5. The battery device according to claim 2, characterized in that, The heat insulation component further includes a nanomaterial layer, and the buffer heat insulation layer covers the nanomaterial layer.

6. The battery device according to claim 2, characterized in that, The numbers of the buffer heat insulation layer and the fireproof layer are both at least two layers, and each side of the middle heat insulation layer in the arrangement direction has at least one layer of the buffer heat insulation layer and one layer of the fireproof layer.

7. The battery device according to claim 1, wherein, The middle heat insulation layer includes a ceramic aerogel layer, and the fireproof layer includes a mica layer or a ceramic layer.

8. The battery device according to claim 7, characterized in that, The fireproof layer and the middle heat insulation layer are connected to the inner side wall of the fixing frame, and the outer insulating layer covers the fireproof layer, the middle heat insulation layer, and the fixing frame.

9. The battery device according to claim 7, characterized in that, The outer insulating layer covers the fireproof layer and the middle heat insulation layer in the receiving space, and the outer insulating layer is connected to the inner side wall of the fixing frame.

10. The battery device according to claim 7, characterized in that, The fixing frame includes two rigid frame bars and two flexible frame bars. The two rigid frame bars are arranged relatively and spaced apart, and the two flexible frame bars are arranged relatively and spaced apart.

11. The battery device according to any one of claims 1 to 10, characterized in that, The heat insulation component further includes two glue layers, and the two glue layers are located on the opposite side surfaces of the outer insulating layer in the arrangement direction. The heat insulation component is adhesively bonded to the two battery cells through the two glue layers.

12. A heat insulation component, characterized in that, The heat insulation component is used to be clamped between two of the battery cells along the arrangement direction of the two battery cells. The heat insulation component includes an outer insulating layer, a fireproof layer, a fixing frame, and a middle heat insulation layer. The fireproof layer and the middle heat insulation layer are stacked along the arrangement direction. The outer insulating layer covers the fireproof layer and the middle heat insulation layer. The fixing frame forms a receiving space, and the fireproof layer and the middle heat insulation layer are located in the receiving space.

13. An electrical device, characterized in that, The electrical device includes the battery device according to any one of claims 1 to 11 or the heat insulation component according to claim 12.

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