Battery and electric device

Abstract

The embodiment of the utility model provides a battery and an electric device. The battery comprises a box body; the heat insulation part is arranged in the box body, the heat insulation part comprises at least two adhesion layers which are arranged at intervals in the thickness direction, a functional layer is arranged between every two adjacent adhesion layers, the section structures of the adhesion layers and the section structures of the functional layers are different, and the heat insulation part is configured to conduct heat insulation between the box body and parts in the box body. The heat insulation piece is of a composite morphological structure, the number of the adhesion layers can be set according to different application scenes, and the distance between the adjacent adhesion layers, the thickness of the adhesion layers and the thickness of the functional layer and the section structure of the adhesion layers and the section structure of the functional layer can be adjusted according to the different application scenes. Therefore, the thermal insulation piece has different product performances, different thermal insulation requirements in the box body are met, and the thermal insulation effect in the battery is improved.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and particularly to a battery and an electrical device using the same. Background Art

[0002] In some related technologies, a battery includes a box body and battery cells, and the battery cells are disposed inside the box body. To avoid heat transfer between the battery cells and the box body, a heat insulation member can be provided between the battery cells and the box body. Since the heat insulation member has a single form, it cannot meet different heat insulation requirements inside the box body, resulting in a poor heat insulation effect inside the battery. Summary of the Utility Model

[0003] Some embodiments of this application provide a battery and an electrical device using the same, which are used to alleviate the problem of poor heat insulation effect inside the battery.

[0004] Some embodiments of this application provide a battery, which includes: a box body; and a heat insulation member disposed inside the box body. The heat insulation member includes at least two attachment layers spaced apart in the thickness direction, and a functional layer is disposed between adjacent attachment layers. The cross-sectional structures of the attachment layer and the functional layer are different, and the heat insulation member is configured to insulate between the box body and the components inside the box body.

[0005] In the above embodiment, the heat insulation member has a composite morphological structure. The number of attachment layers can be set according to different application scenarios, and the distance between adjacent attachment layers can also be adjusted according to different application scenarios. The thicknesses of the attachment layer and the functional layer can be adjusted, and the cross-sectional structures of the attachment layer and the functional layer can be adjusted, so that the heat insulation member has different product performances, meets different heat insulation requirements inside the box body, and improves the heat insulation effect inside the battery.

[0006] In some embodiments, the heat insulation member includes at least three attachment layers, and a functional layer is disposed between each adjacent attachment layer.

[0007] In the above embodiment, the number of attachment layers can be set according to different application scenarios, the distance between adjacent attachment layers can be adjusted, the thicknesses of the attachment layer and the functional layer can be adjusted, and the cross-sectional structures of the attachment layer and the functional layer can be adjusted, so that the heat insulation member has different product performances, meets different heat insulation requirements inside the box body, and improves the heat insulation effect inside the battery.

[0008] In some embodiments, both outer side surfaces of the heat insulation member in the thickness direction are attachment layers.

[0009] In the above embodiment, the attachment layer is used to install and carry the functional layer, and the structural strength of the attachment layer is greater than that of the functional layer. Both outer side surfaces of the heat insulation member in the thickness direction are attachment layers, which can improve the structural strength of the heat insulation member.

[0010] In some embodiments, the functional layer includes a foamed layer made of a foaming material.

[0011] In the above embodiments, the interior of the foamed layer is filled with a large number of tiny bubbles or pores, and these voids are filled with air or gas. Therefore, it has excellent heat insulation effect, reduces the thermal conductivity of the heat insulation member, can reduce heat transfer, extend the heat transfer path, increase the thermal resistance, and improve the heat insulation effect. And the foamed layer is lighter in weight, which helps to reduce the overall weight of the battery.

[0012] In some embodiments, the cross-sectional structure of the functional layer includes a plurality of connecting members arranged at intervals, and both ends of each connecting member are respectively connected to two attachment layers in the thickness direction in a one-to-one correspondence, and two adjacent connecting members and the two attachment layers form a closed structure.

[0013] In the above embodiments, the thickness, shape of the connecting member, and the distance between two adjacent connecting members can all be adjusted according to the actual application scenario, so that the heat insulation member has different product performances, meets different heat insulation requirements inside the box, and improves the heat insulation effect inside the battery; and, two adjacent connecting members and the two attachment layers form a closed structure, and the closed structure can enable the heat insulation member to have a large resilience characteristic, improving the ability to absorb the deformation of the heat insulation member; and the closed structure can also enable the heat insulation member to have a high structural strength, improving the anti-collapse ability of the heat insulation member.

[0014] In some embodiments, the closed structure includes a square structure or a trapezoidal structure.

[0015] In the above embodiments, the distance between two connecting members, the thickness and structure of the connecting member, or the inclination angle of the connecting member can be adjusted as needed, so that the heat insulation member has a large resilience characteristic under the same material, improving the ability to absorb the deformation of the heat insulation member; or enabling the heat insulation member to have a high structural strength under the same material, improving the anti-collapse ability of the heat insulation member, and meeting different application scenarios.

[0016] In some embodiments, the cross-section of the functional layer is a porous structure.

[0017] In the above embodiments, the cross-section of the functional layer is a porous structure, and the pores of the porous structure can be filled with air or gas. Air or gas has excellent heat insulation effect, reduces the thermal conductivity of the heat insulation member, reduces heat transfer, extends the heat transfer path, increases the thermal resistance, and improves the heat insulation effect.

[0018] In some embodiments, the porous structure includes at least two layers of pores arranged along the thickness direction.

[0019] In the above embodiments, the number of layers of the holes can be adjusted as needed, so that the heat insulation member has a large resilience characteristic under the same material, improving the ability to absorb the deformation of the heat insulation member; or the heat insulation member has a high structural strength under the same material, improving the ability of the heat insulation member to resist crushing, and meeting different application scenarios.

[0020] In some embodiments, there is a spacing or adjacency between the holes in the porous structure.

[0021] In the above embodiments, the distance between the holes can be adjusted as needed, so that the heat insulation member has a large resilience characteristic under the same material, improving the ability to absorb the deformation of the heat insulation member; or the heat insulation member has a high structural strength under the same material, improving the ability of the heat insulation member to resist crushing, and meeting different application scenarios.

[0022] In some embodiments, the cross-section of the functional layer is a honeycomb structure.

[0023] In the above embodiments, the interior of the honeycomb structure is filled with a large number of hexagonal cavities, and air or gas can be filled in these cavities. The thermal conductivity of air or gas is very low. Therefore, the honeycomb structure can effectively reduce heat transfer; and the honeycomb structure forms a complex heat transfer path through multiple hexagonal units, increasing the difficulty of heat conduction and improving the heat insulation effect.

[0024] In some embodiments, the attachment layer and the functional layer are integrally formed.

[0025] In the above embodiments, all the attachment layers and all the functional layers of the heat insulation member are integrally formed. Compared with the form of bonding with glue, it can improve the structural strength of the heat insulation member, simplify the preparation process, and improve the assembly efficiency of the battery.

[0026] In some embodiments, the components in the box include battery cells or cooling components, and the cooling components are configured to cool the heat-generating components in the box.

[0027] In the above embodiments, the heat insulation member can be disposed between the battery cell and the box, or the heat insulation member can be disposed between the cooling component and the box. The heat insulation member has strong applicability and can meet different heat insulation requirements.

[0028] Some embodiments of the present application further provide an electrical device, which includes the battery in any of the above embodiments.

[0029] The electrical device provided by the present application includes the battery provided in the embodiments of the present application, and correspondingly has the beneficial effects of the battery.

[0030] Based on the above technical solutions, the present application has at least the following beneficial effects:

[0031] In some embodiments, the heat insulation member has a composite morphological structure. The number of attachment layers can be set according to different application scenarios, and the distance between adjacent attachment layers, the thickness of the attachment layer and the thickness of the functional layer, as well as the cross-sectional structure of the attachment layer and the cross-sectional structure of the functional layer can also be adjusted, so that the heat insulation member has different product performances, meets different heat insulation requirements inside the box, and improves the heat insulation effect inside the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] To clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained according to the drawings without creative efforts.

[0033] Figure 1 is a schematic structural diagram of a vehicle disclosed in some embodiments of the present application;

[0034] Figure 2 is an exploded structural diagram of a battery disclosed in some embodiments of the present application;

[0035] Figure 3 is a cross-sectional schematic diagram of a first embodiment of a heat insulation member disclosed in some embodiments of the present application;

[0036] Figure 4 is a cross-sectional schematic diagram of a second embodiment of a heat insulation member disclosed in some embodiments of the present application;

[0037] Figure 5 is a cross-sectional schematic diagram of a third embodiment of a heat insulation member disclosed in some embodiments of the present application;

[0038] Figure 6 is a cross-sectional schematic diagram of a fourth embodiment of a heat insulation member disclosed in some embodiments of the present application;

[0039] Figure 7 is a cross-sectional schematic diagram of a functional layer of a fifth embodiment of a heat insulation member disclosed in some embodiments of the present application;

[0040] Figure 8 is a cross-sectional schematic diagram of a functional layer of a sixth embodiment of a heat insulation member disclosed in some embodiments of the present application;

[0041] Figure 9 is a cross-sectional schematic diagram of a functional layer of a seventh embodiment of a heat insulation member disclosed in some embodiments of the present application.

[0042] In the drawings, the drawings are not drawn to actual scale.

[0043] Marking description: 1 - Thermal insulation part; 11 - Adhesive layer; 12 - Functional layer; 121 - Foaming layer; 122 - Connecting piece; 123 - Closing structure; 123a - Square structure; 123b - Trapezoidal structure; 124 - Porous structure; 124a - Hole; 125 - Honeycomb structure; 100 - Battery; 101 - Box body; 101a - First box body; 101b - Second box body; 102 - Battery cell; 200 - Vehicle; 201 - Axle; 202 - Wheel; 203 - Motor; 204 - Controller. Specific embodiments

[0044] The following further describes in detail the embodiments of the present application in conjunction with the accompanying drawings and embodiments. The detailed description and drawings of the following embodiments are used to exemplarily illustrate the principles of the present application, but cannot be used to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0045] In the description of the present application, it should be noted that unless otherwise specified, the meaning of "a plurality" is two or more; the orientation or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range.

[0046] The orientation words appearing in the following description are all the directions shown in the drawings, and do not limit the specific structure of the present application. In the description of the present application, it should also be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0047] At present, from the perspective of the development of the market situation, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power stations, but also widely used in electric vehicles such as electric motorcycles and electric vehicles, as well as in multiple fields such as aerospace. With the continuous expansion of the application fields of power batteries, the market demand is also continuously increasing.

[0048] The battery disclosed in the embodiments of the present application can be used as the power source of an electrical device or can be used as the energy storage element of various energy storage systems.

[0049] The electrical device can be a mobile phone, a portable device, a laptop computer, an electric vehicle, an electric car, a ship, a spacecraft, an electric toy, and an electric tool, etc. Among them, the spacecraft can include an airplane, a rocket, a space shuttle, and a spaceship, etc.; the electric toy includes a fixed or mobile electric toy, for example, it can include a game console, an electric vehicle toy, an electric ship toy, and an electric airplane toy, etc.; the electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool, and a railway electric tool, etc., for example, it can include an electric drill, an electric grinder, an electric wrench, an electric screwdriver, a hammer drill, an impact drill, a concrete vibrator, and a planer, etc.

[0050] For the convenience of description, the following embodiments take a vehicle 200, which is an electrical device provided in some embodiments of the present application, as an example for description.

[0051] Reference Figure 1 , Figure 1 is a schematic structural diagram of the vehicle 200 provided in some embodiments of the present application. The vehicle 200 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, or an extended-range vehicle, etc. A battery 100 is disposed inside the vehicle 200. The battery 100 can be disposed at the bottom, the head, or the tail of the vehicle 200. The battery 100 can be used to supply power to the vehicle 200. For example, the battery 100 can be used as the operating power source of the vehicle 200. The vehicle 200 can also include an axle 201, wheels 202 connected to the axle 201, as well as a motor 203 and a controller 204. The motor 203 is used to drive the axle 201 to rotate, and the controller 204 is used to control the operation of the motor 203. The battery 100 can be used to provide electrical energy for the operation of the motor 203 and other components in the vehicle.

[0052] In some embodiments of the present application, the battery 100 can not only be used as the operating power source of the vehicle 200, but also be used as the driving power source of the vehicle 200, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 200.

[0053] Reference Figure 2 , Figure 2Exploded structural schematic diagram of battery 100 provided by some embodiments of the present application. The battery 100 includes a box body 101 and battery cells 102, and the battery cells 102 are accommodated in the box body 101. The box body 101 includes a first box body 101a and a second box body 101b. The first box body 101a and the second box body 101b cover each other, and the first box body 101a and the second box body 101b jointly define an accommodation space for accommodating the battery cells 102. The second box body 101b can be a hollow structure with one end open, and the first box body 101a can be a plate-like structure. The first box body 101a covers the open side of the second box body 101b so that the first box body 101a and the second box body 101b jointly define an accommodation space; the first box body 101a and the second box body 101b can also both be hollow structures with one side open, and the open side of the first box body 101a covers the open side of the second box body 101b. Of course, the box body 101 formed by the first box body 101a and the second box body 101b can be of various shapes, such as: a cylinder or a cuboid, etc.

[0054] There can be multiple battery cells 102, and the multiple battery cells 102 can be connected in series, in parallel, or in a mixed connection. A mixed connection means that there are both series and parallel connections among the multiple battery cells 102. The multiple battery cells 102 can be connected in series, in parallel, or in a mixed connection together, and then the whole formed by the multiple battery cells 102 is accommodated in the box body 101. Of course, the battery 100 can also be in the form that multiple battery cells 102 are first connected in series, in parallel, or in a mixed connection to form battery modules, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole and are accommodated in the box body 101. The battery 100 can also include other components. For example, the battery 100 can also include a busbar assembly and a cooling component. Among them, the busbar assembly is used to achieve electrical connection among the multiple battery cells 102. The cooling component is used to cool heat-generating components such as the battery cells 102 to avoid out-of-control high temperature inside the battery 100.

[0055] The battery cell 102 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 102 can be in the shape of a cylinder, a flat body, a cuboid, or other shapes, etc.

[0056] In some related technologies, components such as battery cells 102 and cooling components are arranged in the box body 101 of the battery 100. In order to insulate the box body 101 from the components inside the box body 101, such as heat insulation or cold insulation, a thermal insulation member needs to be arranged in the box body 101. Through research, it is found that the thermal insulation members in the related technologies have a single form and cannot meet different thermal insulation requirements inside the box body 101, resulting in poor thermal insulation effect inside the battery.

[0057] Based on this, some embodiments of the present application provide a battery and an electrical device using the same to alleviate the problem of poor thermal insulation effect inside the battery.

[0058] Reference Figure 2 and Figure 3 In some embodiments, the battery 100 includes a box body 101 and a heat insulation member 1.

[0059] The heat insulation member 1 is disposed inside the box body 101. The heat insulation member 1 includes at least two attachment layers 11 spaced apart along the thickness direction. A functional layer 12 is disposed between adjacent attachment layers 11. The cross-sectional structures of the attachment layer 11 and the functional layer 12 are different. The heat insulation member 1 is configured to insulate between the box body 101 and the components inside the box body 101.

[0060] In the above embodiments, the heat insulation member 1 includes at least two attachment layers 11 spaced apart along the thickness direction. A functional layer 12 is disposed between adjacent attachment layers 11. The cross-sectional structures of the attachment layer 11 and the functional layer 12 are different, so that the heat insulation member 1 has a composite morphological structure. According to different application scenarios (for example: in some scenarios, it is required that the heat insulation member 1 has strong rigidity and high resistance to crushing; in some scenarios, it is required that the heat insulation member 1 has strong ability to absorb deformation), the number of layers of the attachment layer 11 can be set, and the distance between adjacent attachment layers 11 can also be adjusted according to different application scenarios, as well as the thickness of the attachment layer 11 and the functional layer 12, and the cross-sectional structures of the attachment layer 11 and the functional layer 12, so that the heat insulation member 1 has different product performances, meets different heat insulation requirements inside the box body 101, and improves the heat insulation effect inside the battery 100.

[0061] In the above embodiments, the components inside the box body 101 include heating components or cooling components. Through the heat insulation member 1, heat insulation or cold insulation can be performed between the box body 101 and the components inside the box body 101.

[0062] In some embodiments, the heating component includes a battery cell 102. The heat insulation member 1 can be disposed between the box body 101 and the battery cell 102 to insulate the box body 101 and reduce the heat generated during the charge and discharge process of the battery cell 102 from being transferred to the box body 101.

[0063] In some embodiments, the cooling component includes a component for cooling the battery cell 102. The heat insulation member 1 can be disposed between the box body 101 and the cooling component to insulate the box body 101 and reduce the cold quantity of the cooling component from being transferred to the box body 101.

[0064] Reference Figure 4 In some embodiments, the heat insulation member 1 includes at least three attachment layers 11, and a functional layer 12 is disposed between each adjacent attachment layer 11.

[0065] In the above embodiments, according to different application scenarios, the number of the attachment layers 11 can be set, the distance between adjacent attachment layers 11 can be adjusted, the thicknesses of the attachment layer 11 and the functional layer 12 can be adjusted, and the cross-sectional structures of the attachment layer 11 and the functional layer 12 can be adjusted, so that the heat insulation member 1 has different product performances, meets different heat insulation requirements inside the box body 101, and improves the heat insulation effect inside the battery 100.

[0066] In some embodiments, the battery 100 includes three attachment layers 11 and two functional layers 12. A functional layer 12 is disposed between each adjacent pair of attachment layers 11.

[0067] In some embodiments, both outer side surfaces of the heat insulation member 1 in the thickness direction are attachment layers 11.

[0068] In the above embodiments, the attachment layer 11 is used to mount and carry the functional layer 12, and the structural strength of the attachment layer 11 is greater than that of the functional layer 12. Both outer side surfaces of the heat insulation member 1 in the thickness direction are attachment layers 11, which can improve the structural strength of the heat insulation member 1.

[0069] Reference Figure 3 and Figure 4 In some embodiments, the functional layer 12 includes a foam layer 121 made of a foam material.

[0070] In the above embodiments, the interior of the foam layer 121 is filled with a large number of tiny air bubbles or holes, and these voids are filled with air or gas. Therefore, it has excellent heat insulation effect, reduces the thermal conductivity of the heat insulation member 1, can reduce heat transfer, extend the heat transfer path, increase the thermal resistance, and improve the heat insulation effect. Moreover, the foam layer 121 is lighter in weight, which helps to reduce the overall weight of the battery 100.

[0071] In Figure 3 In the shown embodiment, the battery 100 includes two attachment layers 11, a functional layer 12 is disposed between the two attachment layers 11, and the functional layer 12 is a foam layer 121.

[0072] In Figure 4 In the shown embodiment, the battery 100 includes three attachment layers 11, a functional layer 12 is disposed between every two attachment layers 11, there are a total of two functional layers 12, and both of the two functional layers 12 are foam layers 121.

[0073] Reference Figure 5 and Figure 6 In some embodiments, the cross-sectional structure of the functional layer 12 includes a plurality of connecting members 122 arranged at intervals. Two ends of each connecting member 122 are respectively connected to two attachment layers 11 in one-to-one correspondence in the thickness direction, and two adjacent connecting members 122 and the two attachment layers 11 form a closed structure 123.

[0074] In the above embodiments, the thickness, shape of the connecting member 122, and the distance between two adjacent connecting members 122 can all be adjusted according to the actual application scenario, so that the heat insulation member 1 has different product performances, meets different heat insulation requirements inside the box body 101, and improves the heat insulation effect inside the battery 100. Moreover, two adjacent connecting members 122 and the two attachment layers 11 form a closed structure 123, and the closed structure 123 can enable the heat insulation member 1 to have a large resilience characteristic, improving the ability to absorb the deformation of the heat insulation member 1. And the closed structure 123 can also enable the heat insulation member 1 to have a high structural strength, improving the crush resistance ability of the heat insulation member 1.

[0075] In the above embodiments, the functional layer 12 has a plurality of closed structures 123, and air or gas can be filled inside the closed structures 123. The air or gas has excellent heat insulation effect, reducing the thermal conductivity of the heat insulation member 1, being able to reduce heat transfer, extend the heat transfer path, increase the thermal resistance, and improve the heat insulation effect.

[0076] Reference Figure 5 and Figure 6 In some embodiments, the closed structure 123 includes a square structure 123a or a trapezoidal structure 123b.

[0077] In the above embodiments, with reference to Figure 5 , the connecting members 122 are arranged in parallel. Two adjacent connecting members 122 and the two attachment layers 11 where they are located form a square structure 123a. The distance between the two connecting members 122, the thickness and structure of the connecting members 122 can be adjusted as needed, so that the heat insulation member 1 has a large resilience characteristic under the same material, improving the ability to absorb the deformation of the heat insulation member 1; or enabling the heat insulation member 1 to have a high structural strength under the same material, improving the crush resistance ability of the heat insulation member 1.

[0078] In the above embodiments, with reference to Figure 6 , the connecting members 122 are not arranged in parallel. Two adjacent connecting members 122 and the two attachment layers 11 where they are located form a trapezoidal structure 123b. The distance between the two connecting members 122, the thickness and structure of the connecting members 122, or the inclination angle of the connecting members 122 can be adjusted as needed, so that the heat insulation member 1 has a large resilience characteristic under the same material, improving the ability to absorb the deformation of the heat insulation member 1; or enabling the heat insulation member 1 to have a high structural strength under the same material, improving the crush resistance ability of the heat insulation member 1 to meet different application scenarios.

[0079] Reference Figure 7 and Figure 8 In some embodiments, the cross-section of the functional layer 12 is a porous structure 124.

[0080] In the above embodiments, the cross-section of the functional layer 12 is a porous structure 124. Air or gas can be filled in the pores 124a of the porous structure 124. The air or gas has excellent heat insulation effect, which reduces the thermal conductivity of the heat insulation member 1, reduces heat transfer, extends the heat transfer path, increases the thermal resistance, and improves the heat insulation effect.

[0081] In the above embodiments, the shape and size of the pores 124a can be adjusted as needed, and the distance between the pores 124a can be adjusted, so that the heat insulation member 1 has greater resilience characteristics under the same material, improving the ability to absorb the deformation of the heat insulation member 1; or the heat insulation member 1 has higher structural strength under the same material, improving the crush resistance of the heat insulation member 1, to meet different application scenarios.

[0082] In some embodiments, the porous structure 124 includes at least two layers of pores 124a arranged along the thickness direction.

[0083] In the above embodiments, the number of layers of the pores 124a can be adjusted as needed, so that the heat insulation member 1 has greater resilience characteristics under the same material, improving the ability to absorb the deformation of the heat insulation member 1; or the heat insulation member 1 has higher structural strength under the same material, improving the crush resistance of the heat insulation member 1, to meet different application scenarios.

[0084] In Figure 7 and Figure 8 In the embodiments shown, the porous structure 124 includes three layers of pores 124a arranged along the thickness direction.

[0085] In some embodiments, there is a spacing or adjacency between the pores 124a in the porous structure 124.

[0086] In the above embodiments, the distance between the pores 124a can be adjusted as needed, so that the heat insulation member 1 has greater resilience characteristics under the same material, improving the ability to absorb the deformation of the heat insulation member 1; or the heat insulation member 1 has higher structural strength under the same material, improving the crush resistance of the heat insulation member 1, to meet different application scenarios.

[0087] In Figure 7 In the embodiments shown, there is a spacing greater than zero between the pores 124a in the porous structure 124.

[0088] In Figure 8 In the embodiments shown, the pores 124a in the porous structure 124 are adjacent and the spacing is zero.

[0089] In some embodiments, the pores 124a include round holes, oval holes, polygonal holes, or irregular holes, etc.

[0090] ReferenceFigure 9 , in some embodiments, the cross-section of the functional layer 12 is a honeycomb structure 125.

[0091] In the above embodiments, the interior of the honeycomb structure 125 is filled with a large number of hexagonal cavities, and these cavities can be filled with air or gas, and the thermal conductivity of air or gas is very low, about 0.026 W / (m·K). Therefore, the honeycomb structure 125 can effectively reduce heat transfer; and the honeycomb structure 125 forms a complex heat transfer path through multiple hexagonal units, increasing the difficulty of heat conduction and improving the heat insulation effect.

[0092] In some embodiments, the cross-section of the functional layer 12 is a multi-layer honeycomb structure 125, and each layer of the honeycomb structure 125 adds an additional heat insulation barrier, further enhancing the overall heat insulation performance.

[0093] In some embodiments, the attachment layer 11 and the functional layer 12 are integrally formed.

[0094] In the above embodiments, all the attachment layers 11 and all the functional layers 12 of the heat insulation member 1 are integrally formed. Compared with the form of bonding with glue, it can improve the structural strength of the heat insulation member 1, simplify the preparation process, and improve the assembly efficiency of the battery 100.

[0095] In some embodiments, all the attachment layers 11 and all the functional layers 12 of the heat insulation member 1 are integrally formed by molding.

[0096] In some embodiments, all the attachment layers 11 and all the functional layers 12 of the heat insulation member 1 are made of foam.

[0097] In some embodiments, the components in the box body 101 include battery cells 102 or cooling components, and the cooling components are configured to cool the heat-generating components in the box body 101.

[0098] In some embodiments, the heat insulation member 1 is disposed between the battery cell 102 and the box body 101 to reduce the heat transfer from the battery cell 102 generated during charging and discharging to the box body 101.

[0099] In some embodiments, the heat insulation member 1 is disposed between the cooling component and the box body 101 to reduce the transfer of the cold quantity of the cooling component to the box body 101.

[0100] In the above embodiments, the heat-generating component includes the battery cell 102, and the cooling component can be a component for cooling the battery cell 102.

[0101] In the above embodiments, the heat insulation member 1 can be disposed between the battery cell 102 and the box body 101, or the heat insulation member 1 can be disposed between the cooling component and the box body 101. The heat insulation member 1 has strong applicability and can meet different heat insulation requirements.

[0102] In some embodiments, the battery 100 includes a box body 101 and a heat insulation member 1. The heat insulation member 1 is disposed within the box body 101. The heat insulation member 1 includes at least two attachment layers 11 spaced apart in the thickness direction, and a functional layer 12 is disposed between adjacent attachment layers 11. The cross-sectional structures of the attachment layer 11 and the functional layer 12 are different. The heat insulation member 1 is configured to insulate between the box body 101 and the components within the box body 101. Refer to Figures 3 to 9 , and some specific embodiments of the heat insulation member 1 are described in detail.

[0103] In some specific embodiments, the battery 100 may include two attachment layers 11, and a functional layer 12 is disposed between the two attachment layers 11. The battery 100 may also include three attachment layers 11 and two functional layers 12. A functional layer 12 is disposed between each adjacent pair of attachment layers 11.

[0104] In the first embodiment, the functional layer 12 is a foamed layer 121.

[0105] In the second embodiment, both of the two functional layers 12 are foamed layers 121.

[0106] In the third embodiment, the cross-sectional structure of the functional layer 12 includes a plurality of connecting members 122 spaced apart. Two ends of each connecting member 122 are respectively and correspondingly connected to two attachment layers 11 in the thickness direction, and adjacent two connecting members 122 and the two attachment layers 11 form a closed structure 123. The closed structure 123 is a square structure 123a.

[0107] In the fourth embodiment, the cross-sectional structure of the functional layer 12 includes a plurality of connecting members 122 spaced apart. Two ends of each connecting member 122 are respectively and correspondingly connected to two attachment layers 11 in the thickness direction, and adjacent two connecting members 122 and the two attachment layers 11 form a closed structure 123. The closed structure 123 is a trapezoidal structure 123b.

[0108] In the fifth embodiment, the cross-section of the functional layer 12 is a porous structure 124. The porous structure 124 includes at least two layers of holes 124a arranged in the thickness direction. There is a spacing greater than zero between the holes 124a in the porous structure 124.

[0109] In the sixth embodiment, the cross-section of the functional layer 12 is a porous structure 124. The porous structure 124 includes at least two layers of holes 124a arranged in the thickness direction. The holes 124a in the porous structure 124 are adjacent to each other, and the spacing is zero.

[0110] In the seventh embodiment, the cross-section of the functional layer 12 is a multi-layer honeycomb structure 125.

[0111] In each of the above embodiments, the performance of the heat insulation member 1 can be designed and adjusted according to different application requirements.

[0112] 1. The air tightness can be adjusted by changing the thickness of the adhesion layer 11, improving the material's anti-yielding ability. In some tests, the anti-yielding ability of the heat insulation member 1 can be increased from 1.2 MPa to 1.9 MPa.

[0113] 2. The anti-yielding ability of the heat insulation member 1 can be improved by changing the thickness of the connecting member 122.

[0114] 3. The anti-yielding ability of the heat insulation member 1 can be improved by increasing the thickness of the adhesion layer 11, the thickness of the connecting member 122, and the spacing between the connecting members 122. In some tests, the compressive yield limit strain of the heat insulation member 1 can be increased from 20% to 30%.

[0115] In some embodiments, the adhesion layer 11 and the functional layer 12 can be made of the same material or different materials.

[0116] Some embodiments of the present application provide an electrical device, which includes the battery in any of the above embodiments.

[0117] The electrical device provided by the present application includes the battery provided by the embodiments of the present application, and accordingly has the beneficial effects of the battery.

[0118] Based on the above embodiments of the present application, without explicit negation or conflict, the technical features of one embodiment can be beneficially combined with one or more other embodiments.

[0119] Although the present application has been described with reference to the preferred embodiments, various improvements can be made to it and its components can be replaced with equivalents without departing from the scope 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 herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery, characterized in that: include: Box (101); as well as A thermal insulation component (1) is arranged in the box (101), the thermal insulation component (1) comprising at least two adhesion layers (11) arranged at intervals in the thickness direction, a functional layer (12) being arranged between adjacent adhesion layers (11), the adhesion layer (11) and the functional layer (12) having different cross-sectional structures, the thermal insulation component (1) being configured to insulate the box (101) from components in the box (101); the components in the box (101) comprising battery cells (102) or cooling components, the cooling components being configured to cool down heat-generating components in the box (101).

2. The battery according to claim 1, characterized in that The thermal insulation element (1) comprises at least three adhesion layers (11), and a functional layer (12) is arranged between each adjacent adhesion layer (11).

3. The battery according to claim 1, characterized in that Both outer side surfaces of the thermal insulation component (1) in the thickness direction are adhesive layers (11).

4. The battery according to claim 1, characterized in that The functional layer (12) comprises a foaming layer (121) made of a foaming material.

5. The battery according to claim 1, characterized in that The cross-sectional structure of the functional layer (12) comprises a plurality of connection pieces (122) arranged at intervals, the two ends of each connection piece (122) being connected to the two attachment layers (11) in a one-to-one correspondence in the thickness direction, and two adjacent connection pieces (122) and the two attachment layers (11) forming a closed structure (123).

6. The battery according to claim 5, characterized in that The closed structure (123) includes a square structure (123a) or a trapezoidal structure (123b).

7. The battery according to claim 1, characterized in that The cross section of the functional layer (12) is a porous structure (124).

8. The battery according to claim 7, characterized in that The porous structure (124) comprises at least two layers of pores (124a) arranged along the thickness direction.

9. The battery according to claim 7, characterized in that The holes (124a) in the porous structure (124) have a spacing or are adjacent to each other.

10. The battery according to claim 1, characterized in that The cross section of the functional layer (12) is a honeycomb structure (125).

11. The battery according to claim 1, characterized in that The adhesion layer (11) and the functional layer (12) are integrally formed.

12. An electrical device, characterized in that: Comprising a battery according to any one of claims 1 to 11.

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