Heat insulation pad, battery device and electric device

Abstract

The utility model discloses a heat insulation pad, a battery device and an electric device, the heat insulation pad comprises a heat insulation pad body and a reinforcing structure, the reinforcing structure is arranged on the heat insulation pad body, the rigidity of the reinforcing structure is greater than that of the heat insulation pad body, and the rigidity P of the reinforcing structure is greater than or equal to 0.1 GPa. According to the heat insulation pad disclosed by the utility model, the heat insulation performance of the heat insulation pad is slightly influenced by the swelling of the single batteries, and a better heat insulation effect can be achieved, so that the safety, the reliability and the robustness of the battery device can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a heat insulation pad, a battery device and an electric device. Background Art

[0002] In the related technology, batteries are widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment, aerospace and other fields. When the battery is working, it will generate heat, causing the battery temperature to rise, swelling, and in severe cases, thermal runaway. The battery device usually includes multiple battery cells. In order to reduce the heat transfer between battery cells and cause heat or even thermal runaway, an insulation pad is usually set between the battery cells to reduce the heat transfer between the battery cells.

[0003] During long-term charge and discharge cycles, the battery cells will continue to swell and squeeze the insulation pad, thus affecting the insulation performance of the insulation pad. However, the insulation performance of the insulation pad in the related art is greatly affected by the swelling of the battery, and cannot play a good insulation role, thereby reducing the safety and reliability of the battery device. Therefore, there is room for improvement. Utility Model Content

[0004] In view of the above problems, the present application provides a thermal insulation pad, a battery device and an electrical device. The thermal insulation performance of the thermal insulation pad is less affected by the swelling of the battery cells and can play a better thermal insulation role, thereby improving the safety, reliability and robustness of the battery device.

[0005] In a first aspect, the utility model provides a thermal insulation pad, comprising: a thermal insulation pad body; a reinforcement structure, wherein the reinforcement structure is arranged on the thermal insulation pad body, the stiffness of the reinforcement structure is greater than the stiffness of the thermal insulation pad body, and the stiffness P of the reinforcement structure is ≥ 0.1 GPa.

[0006] In the above technical scheme, by arranging a reinforcing structure on the insulation pad body and making the stiffness of the reinforcing structure greater than the stiffness of the insulation pad body, the insulation pad can be strengthened and the overall stiffness of the insulation pad can be improved, thereby enhancing the compression resistance of the insulation pad, making the thermal insulation performance of the insulation pad less affected by the swelling of the battery cell, and having a better thermal insulation effect, thereby improving the safety, reliability and robustness of the battery device; by making the stiffness of the reinforcing structure greater than 0.1GPa, the overall stiffness of the insulation pad can be better improved, and the compression resistance of the insulation pad can be effectively enhanced.

[0007] In some implementations, the stiffness P of the reinforcement structure is ≥ 1 GPa.

[0008] In the above technical solution, by making the stiffness of the reinforcing structure greater than 1 GPa, the overall stiffness of the thermal insulation pad can be better improved and the compression resistance of the thermal insulation pad can be effectively enhanced.

[0009] In some implementations, the stiffness P of the reinforcement structure is ≥ 10 GPa.

[0010] In the above technical solution, by making the stiffness of the reinforcing structure greater than 10 GPa, the overall stiffness of the thermal insulation pad can be better improved and the compression resistance of the thermal insulation pad can be effectively enhanced.

[0011] In some implementations, the melting point of the reinforcement structure is greater than the melting point of the thermal insulation pad body.

[0012] In the above technical solution, by making the melting point of the reinforcement structure greater than the melting point of the thermal insulation pad body, when the battery cell has thermal runaway, the reinforcement structure can be reduced from being melted by the high-temperature particles ejected when the battery cell has thermal runaway, thereby improving the reliability of the reinforcement structure and ensuring the thermal insulation function of the thermal insulation pad to a certain extent.

[0013] In some implementations, the melting point R of the reinforcement structure is ≥ 950°C.

[0014] In the above technical solution, by making the melting point of the reinforced structure greater than 950°C, the reinforced structure can be better prevented from being melted by the high-temperature particles ejected when the battery cell has thermal runaway, thereby better improving the reliability of the reinforced structure and better ensuring the thermal insulation function of the thermal insulation pad.

[0015] In some implementations, the material of the reinforcement structure is tungsten or molybdenum or titanium alloy or cobalt-based alloy or nickel-based superalloy or silicon carbide or boron carbide or aluminum oxide.

[0016] In the above technical scheme, by making the material of the reinforced structure adopt tungsten or molybdenum or titanium alloy or cobalt-based alloy or nickel-based superalloy or silicon carbide or boron carbide or aluminum oxide, the reinforced structure can not only have higher rigidity, but also have higher melting point and better high temperature resistance. In this way, when the battery cell has thermal runaway, the reinforced structure can be better prevented from being melted by the high-temperature particles ejected when the battery cell has thermal runaway, thereby better improving the reliability of the reinforced structure and better ensuring the thermal insulation function of the thermal insulation pad.

[0017] In some implementations, the material of the reinforcement structure is titanium alloy, silicon carbide, or boron carbide.

[0018] In the above technical solution, by making the material of the reinforcement structure use titanium alloy or silicon carbide or boron carbide, the reinforcement structure not only has higher rigidity, higher melting point and better high temperature resistance, but also has higher bending strength. When the battery cell swells, the battery cell will squeeze the thermal insulation pad to cause the thermal insulation pad to bend and deform. By making the reinforcement structure have higher bending strength, the bending deformation of the thermal insulation pad caused by the squeezing of the battery cell can be reduced. In this way, the thermal insulation pad can maintain better thermal insulation performance, and can make the thermal insulation pad not easy to be damaged, thereby extending the service life of the thermal insulation pad.

[0019] In some implementations, the thermal insulation pad body is an aerogel piece.

[0020] In the above technical solution, by setting the insulation pad body as an aerogel piece, utilizing the good thermal insulation effect of the aerogel material itself, and setting a reinforcing structure with greater rigidity on the insulation pad body, the overall thermal insulation performance of the insulation pad can be improved.

[0021] In some implementations, at least a portion of the reinforcement structure is embedded within the insulation pad body.

[0022] In the above technical solution, by embedding at least part of the reinforcing structure into the thermal insulation pad body, the stiffness of the thermal insulation pad can be better improved, and the compression resistance of the thermal insulation pad can be better enhanced, so that the thermal insulation performance of the thermal insulation pad is less affected by the swelling of the battery cell, and can play a better thermal insulation role, thereby improving the safety, reliability and robustness of the battery device.

[0023] In some embodiments, the thermal insulation pad is used to be clamped between battery cells, the pressure relief structure of the battery cell is located at one end of the battery cell along a first direction, the thermal insulation pad body includes a first body portion and a second body portion arranged along the first direction, the first body portion is located on a side of the second body portion close to the pressure relief structure, the arrangement density of the reinforcement structure in the first body portion is greater than the arrangement density in the second body portion, and the first direction is perpendicular to the thickness direction of the thermal insulation pad body.

[0024] In the above technical solution, when a battery cell experiences thermal runaway, the battery cell will spray high-temperature particles to the outside through the pressure relief structure. By making the arrangement density of the reinforcing structure provided on the part of the thermal insulation pad body close to the pressure relief structure of the battery cell relatively large, the part of the thermal insulation pad close to the pressure relief structure of the battery cell can have better rigidity and better resistance to thermal shock, making it more resistant to thermal shock of high-temperature particles and improving the stability and reliability of the thermal insulation pad.

[0025] In some implementations, the reinforcement structure includes a plurality of reinforcing ribs intersecting each other.

[0026] In the above technical solution, by configuring the reinforcement structure as a plurality of mutually intersecting reinforcement ribs, the strength and rigidity of the reinforcement structure itself can be made higher, thereby effectively strengthening the thermal insulation pad.

[0027] In some implementations, the thickness dimension of the reinforcing rib in the thickness direction of the thermal insulation pad body is C1, the thickness of the thermal insulation pad body is C, and 0.5≤C1 / C≤1.

[0028] In the above technical scheme, by making the ratio of the thickness of the reinforcing rib to the thickness of the insulation pad body not less than 0.5, the overall stiffness of the insulation pad can be made higher, and by making the ratio of the thickness of the reinforcing rib to the thickness of the insulation pad body not greater than 1, the overall thickness of the insulation pad can be made smaller, reducing the space occupied by the insulation pad, which is beneficial to making the energy density of the battery device higher, and also enables the insulation pad body to have a sufficient proportion to fully exert its thermal insulation performance; by setting the ratio of the thickness of the reinforcing rib to the thickness of the insulation pad body between 0.5 and 1, the thermal insulation performance of the insulation pad can be better and the overall thickness of the insulation pad can be made smaller.

[0029] In some embodiments, the plurality of reinforcing ribs include a first reinforcing rib and a second reinforcing rib that are cross-arranged with each other, the first reinforcing rib extends along a first direction, and the first reinforcing rib is a plurality of ribs arranged at intervals along a second direction, the second reinforcing rib extends along a second direction, and the second reinforcing rib is a plurality of ribs arranged at intervals along the first direction, the second direction intersects with the first direction, and the second direction and the first direction are both perpendicular to the thickness direction of the thermal insulation pad body.

[0030] In the above technical solution, by configuring multiple reinforcing ribs to include multiple first reinforcing ribs extending along the first direction and arranged along the second direction and multiple second reinforcing ribs extending along the second direction and arranged along the first direction, the overall structure of the reinforcement structure can be made simple and have higher rigidity and stability, thereby effectively improving the rigidity and stability of the thermal insulation pad.

[0031] In some embodiments, a single first reinforcing rib intersects with multiple second reinforcing ribs to divide the first reinforcing rib into multiple first reinforcing segments, the first reinforcing segment is located between two adjacent second reinforcing ribs, and the ratio of the length dimension of the first reinforcing segment in the first direction to the length dimension of the insulation pad body in the first direction is a, 0.02<a<0.5; and / or, a single second reinforcing rib intersects with multiple first reinforcing ribs to divide the second reinforcing rib into multiple second reinforcing segments, the second reinforcing segment is located between two adjacent first reinforcing ribs, and the ratio of the length dimension of the second reinforcing segment in the second direction to the length dimension of the insulation pad body in the second direction is b, 0.02<b<0.5.

[0032] In the above technical solution, by limiting the relative length of the first reinforcement segment of the first reinforcement rib and / or the second reinforcement segment of the second reinforcement rib, the arrangement density of the first reinforcement rib and the second reinforcement rib can be limited. By making a and / or b less than 0.5, the arrangement density of multiple reinforcement ribs can be larger. By making a and / or b greater than 0.02, the arrangement density of multiple reinforcement ribs can be more reasonable, so that the processing technology of the reinforcement structure is not difficult and the material of the reinforcement structure can be saved.

[0033] In some embodiments, the thermal insulation pad is used to be clamped between battery cells, the pressure relief structure of the battery cell is located at one end of the battery cell along the first direction, the thermal insulation pad body includes a first body portion and a second body portion arranged along the first direction, the first body portion is located on a side of the second body portion close to the pressure relief structure, the first reinforcement segment located at the first body portion has a length dimension M1 in the first direction, and the first reinforcement segment located at the second body portion has a length dimension M2 in the first direction, M1<M2; and / or, the second reinforcement segment located at the first body portion has a length dimension N1 in the second direction, and the second reinforcement segment located at the second body portion has a length dimension N2 in the second direction, N1<N2.

[0034] In the above technical solution, when the thermal insulation pad is clamped between battery cells, the arrangement density of the reinforcing ribs on the first main body part of the thermal insulation pad body close to the pressure relief structure of the battery cell is set to be relatively large. When thermal runaway occurs in the battery cell, the battery cell will spray high-temperature particles to the outside through the pressure relief structure. The part of the thermal insulation pad close to the pressure relief structure of the battery cell can have better rigidity and better resistance to thermal shock, making it more resistant to thermal shock of high-temperature particles, thereby improving the stability and reliability of the thermal insulation pad.

[0035] In some implementations, the mesh shape formed by the intersection of multiple reinforcing ribs is polygonal, circular or elliptical.

[0036] In the above technical solution, by making the mesh shape formed by the intersection of multiple reinforcing ribs polygonal, circular or elliptical, the structure of the reinforcement structure can be made simpler and convenient for processing and forming.

[0037] In some implementations, the reinforcing rib is a solid structure or a hollow structure.

[0038] In the above technical solution, by setting the reinforcing ribs as solid structures, the overall stiffness of the reinforced structure can be made higher. When the reinforcing ribs are set as hollow structures, the material used can be reduced and the weight of the thermal insulation pad can be reduced. When the thermal insulation pad is used in a battery device, it is beneficial to improve the energy density of the battery device.

[0039] In a second aspect, the utility model provides a battery device, comprising: a box body; a plurality of battery cells disposed in the box body; and a thermal insulation pad according to the embodiment of the first aspect of the utility model, the thermal insulation pad being disposed between adjacent battery cells.

[0040] In the above technical solution, the battery device includes the above-mentioned thermal insulation pad and the thermal insulation pad is arranged between the battery cells, which can better play the role of thermal insulation between the battery cells and improve the safety, reliability and robustness of the battery device.

[0041] In a third aspect, the utility model provides an electrical device, comprising: a battery device according to the embodiment of the second aspect of the utility model.

[0042] In the above technical solution, the electrical device includes the above battery device, which can improve the safety, reliability and robustness of the battery device.

[0043] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0045] Figure 1 is an exploded schematic diagram of a thermal insulation pad according to some embodiments of the utility model;

[0046] Figure 2 yes Figure 1 Schematic diagram of the coordination between the heat insulation pad body and the reinforcement structure;

[0047] Figure 3 yes Figure 1 A cross-sectional schematic diagram of the heat insulation pad body and the reinforcement structure;

[0048] Figure 4 yes Figure 1 A schematic diagram of the heat insulation pad body and the reinforcement structure from another angle;

[0049] Figure 5 is an exploded schematic diagram of a thermal insulation pad according to other embodiments of the utility model;

[0050] Figure 6 yes Figure 5 Schematic diagram of the coordination between the heat insulation pad body and the reinforcement structure;

[0051] Figure 7 yes Figure 5 A cross-sectional schematic diagram of the heat insulation pad body and the reinforcement structure;

[0052] Figure 8 It is a schematic diagram of the cooperation between the thermal insulation pad and the battery cell according to some embodiments of the utility model;

[0053] Fig. 9 is a schematic diagram of a battery device according to some embodiments of the present utility model;

[0054] Fig.10 It is a schematic diagram of an electrical device according to some embodiments of the utility model.

[0055] Reference numerals:

[0056] 100. Insulation pad;

[0057] 10. Insulation pad body; 11. First body portion; 12. Second body portion;

[0058] 20. reinforcement structure; 21. reinforcement rib; 211. first reinforcement rib; 2110. first reinforcement section; 212. second reinforcement rib; 2120. second reinforcement section; 22. mesh;

[0059] 30. Encapsulating film; 40. Double-sided adhesive layer;

[0060] 200, battery device; 50, battery cell; 51, pressure relief structure; 60, box body;

[0061] 1000. Electrical device; 300. Vehicle body. DETAILED DESCRIPTION

[0062] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0063] Unless otherwise defined, all technical and scientific terms used in the present invention have the same meanings as those generally understood by technicians in the technical field of the present invention; the terms used in the specification of the present invention in the application are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present invention or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0064] The reference to "embodiment" in the present invention means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0065] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", and "attachment" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0066] The term "and / or" in the present invention is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in the present invention generally indicates that the associated objects before and after are in an "or" relationship.

[0067] In the embodiments of the present invention, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present invention shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary and should not constitute any limitation on the present invention.

[0068] The term “plurality” used in the present invention refers to two or more (including two).

[0069] In the embodiments of the present invention, unless otherwise specified, all embodiments and optional embodiments of the present invention can be combined with each other to form a new technical solution.

[0070] In the embodiments of the present invention, unless otherwise specified, all technical features and optional technical features of the present invention can be combined with each other to form a new technical solution.

[0071] In an embodiment of the present invention, a battery apparatus may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include a plurality of battery cells, which are connected in series, in parallel, or in mixed connection through a busbar. For example, a battery cell assembly is usually formed by arranging a plurality of battery cells; a battery cell assembly may be a battery module, which is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, a battery module may be formed by bundling a plurality of battery cells by cable ties.

[0072] The battery device may be a battery pack, which includes a box and one or more battery cell assemblies, and the battery cell assemblies are accommodated in the box. The battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box by fixing the battery module in the box; the battery cell assembly may also be accommodated in the box by directly fixing a plurality of battery cells to the box.

[0073] In an embodiment of the utility model, the battery case may include a first case and a second case. The first case and the second case are buckled together to form a closed space inside the case to accommodate the battery monomer assembly. The closed here means covering or closing, which can be sealed or unsealed. The first case may be a top cover or a bottom plate. For example, the battery case may include a top cover, a frame and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that a closed space is formed inside the case to accommodate the battery monomer assembly.

[0074] In an embodiment of the utility model, the battery box can be used as a part of the chassis structure of the vehicle. For example, part of the battery box can become at least a part of the floor of the vehicle, or part of the battery box can become at least a part of the crossbeam and longitudinal beam of the vehicle.

[0075] In the embodiment of the present utility model, the battery cell may be a secondary battery, which refers to a battery cell that can be used continuously by activating the active material by charging after the battery cell is discharged; the battery cell may be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc., which is not limited in the embodiment of the present utility model. The battery cell may be cylindrical, flat, rectangular or in other shapes, which is not limited in the embodiment of the present utility model. Battery cells are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells, which is not limited in the embodiment of the present utility model.

[0076] In the related technology, batteries are widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment, aerospace and other fields. When the battery is working, it will generate heat, causing the battery temperature to rise, swelling, and in severe cases, thermal runaway. The battery device usually includes multiple battery cells. In order to reduce the heat transfer between battery cells and cause heat or even thermal runaway, an insulation pad is usually set between the battery cells to reduce the heat transfer between the battery cells.

[0077] During long-term charge and discharge cycles, the battery cells will continue to swell and squeeze the insulation pad, thus affecting the insulation performance of the insulation pad. However, the insulation performance of the insulation pad in the related art is greatly affected by the swelling of the battery, and cannot play a good insulation role, thereby reducing the safety and reliability of the battery device. Therefore, there is room for improvement.

[0078] Based on this, the utility model proposes a thermal insulation pad, comprising: a thermal insulation pad body and a reinforcement structure, wherein the reinforcement structure is arranged on the thermal insulation pad body, the stiffness of the reinforcement structure is greater than the stiffness of the thermal insulation pad body, and the stiffness of the reinforcement structure P≥0.1GPa.

[0079] In the above-mentioned thermal insulation pad, by providing a reinforcing structure on the thermal insulation pad body and making the stiffness of the reinforcing structure greater than the stiffness of the thermal insulation pad body, the thermal insulation pad can be strengthened and the overall stiffness of the thermal insulation pad can be improved, thereby enhancing the compression resistance of the thermal insulation pad, making the thermal insulation performance of the thermal insulation pad less affected by the swelling of the battery cell, and having a better thermal insulation effect, thereby improving the safety, reliability and robustness of the battery device; by making the stiffness of the reinforcing structure greater than 0.1GPa, the overall stiffness of the thermal insulation pad can be better improved, and the compression resistance of the thermal insulation pad can be effectively enhanced.

[0080] The battery device disclosed in the embodiment of the utility model can be used in electrical equipment that uses the battery device as a power source or various energy storage systems that use the battery device as an energy storage element. In addition to being used in vehicles, the battery device can also be used for, but not limited to, mobile phones, tablets, laptops, electric toys, electric tools, battery cars, electric cars, ships, spacecraft, etc. Among them, electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecrafts, etc.

[0081] The power-consuming device disclosed in the embodiments of the utility model may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device is provided inside the vehicle, and the battery device may be provided at the bottom, head or tail of the vehicle. The battery device may be used to power the vehicle, for example, the battery device may be used as an operating power source for the vehicle. The vehicle may also include a controller and a motor, and the controller is used to control the battery device to power the motor, for example, for the starting, navigation and working power requirements of the vehicle during driving. In some embodiments of the utility model, the battery device may be used not only as an operating power source for the vehicle, but also as a driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0082] Reference below Figure 1-Figure 8 A thermal insulation pad 100 according to an embodiment of the present invention is described.

[0083] refer to Figure 1-Figure 2 In a first aspect, the utility model provides a thermal insulation pad 100 , comprising: a thermal insulation pad body 10 and a reinforcement structure 20 , wherein the reinforcement structure 20 is disposed on the thermal insulation pad body 10 , and the stiffness of the reinforcement structure 20 is greater than the stiffness of the thermal insulation pad body 10 .

[0084] The thermal insulation pad body 10 can be made of a material with a relatively low thermal conductivity, and the thermal insulation pad body 10 has good thermal insulation performance.

[0085] The connection method between the reinforcing structure 20 and the insulation pad body 10 may include the following situations: for example, the reinforcing structure 20 may be riveted to the insulation pad body 10, the reinforcing structure 20 may be fixed to the insulation pad body 10 by structural adhesive, or the reinforcing structure 20 may also be fixed to the insulation pad body 10 by embedding or pressing, or the insulation pad body 10 may be integrally formed on the reinforcing structure 20.

[0086] The reinforcement structure 20 may be located outside the thermal insulation pad body 10, for example, the reinforcement structure 20 may be located on at least one side in the thickness direction of the thermal insulation pad body 10. The thickness direction of the thermal insulation pad body 10 may refer to the e3 direction in the accompanying drawings.

[0087] The reinforcement structure 20 may also be at least partially embedded into the interior of the thermal insulation pad body 10 .

[0088] The reinforcement structure 20 may be in the form of a plate or a grid.

[0089] In the above technical scheme, by arranging a reinforcing structure 20 on the thermal insulation pad body 10 and making the stiffness of the reinforcing structure 20 greater than the stiffness of the thermal insulation pad body 10, the thermal insulation pad 100 can be strengthened and the overall stiffness of the thermal insulation pad 100 can be improved, thereby enhancing the compression resistance of the thermal insulation pad 100, making the thermal insulation performance of the thermal insulation pad 100 less affected by the expansion of the battery cell 50, and having a better thermal insulation effect, thereby improving the safety, reliability and robustness of the battery device 200.

[0090] In some implementations, the stiffness P of the reinforcement structure 20 is ≥ 0.1 GPa.

[0091] In the above technical solution, by making the stiffness of the reinforcing structure 20 greater than 0.1 GPa, the overall stiffness of the thermal insulation pad 100 can be better improved, and the compression resistance of the thermal insulation pad 100 can be effectively enhanced.

[0092] In some implementations, the stiffness P of the reinforcement structure 20 is ≥ 1 GPa.

[0093] In the above technical solution, by making the stiffness of the reinforcing structure 20 greater than 1 GPa, the overall stiffness of the thermal insulation pad 100 can be better improved, and the compression resistance of the thermal insulation pad 100 can be effectively enhanced.

[0094] In some implementations, the stiffness P of the reinforcement structure 20 is ≥ 10 GPa.

[0095] In the above technical solution, by making the stiffness of the reinforcing structure 20 greater than 10 GPa, the overall stiffness of the thermal insulation pad 100 can be better improved, and the compression resistance of the thermal insulation pad 100 can be effectively enhanced.

[0096] In some implementations, the melting point of the reinforcement structure 20 is greater than the melting point of the thermal insulation pad body 10 .

[0097] Among them, for the measurement method of melting point, the corresponding national standard is selected according to its material; for example, plastic materials are based on GB / T8927-2008 "Determination of Melting Point of Plastics Using Differential Scanning Calorimetry (DSC)", and metal materials are based on GB / T 1507.1-2005 "Terms of Thermal Analysis of Metallic Materials" and GB / T 1507.2-2005 "Thermal Analysis Methods of Metallic Materials".

[0098] In the above technical solution, by making the melting point of the reinforcement structure 20 greater than the melting point of the thermal insulation pad body 10, when the battery cell 50 has thermal runaway, the reinforcement structure 20 can be reduced from being melted by the high-temperature particles ejected when the battery cell 50 has thermal runaway, thereby improving the reliability of the reinforcement structure 20 and ensuring the thermal insulation function of the thermal insulation pad 100 to a certain extent.

[0099] In some implementations, the melting point R of the reinforcement structure 20 is ≥ 950°C.

[0100] In the above technical solution, by making the melting point of the reinforcement structure 20 greater than 950°C, when the battery cell 50 has thermal runaway, the reinforcement structure 20 can be better prevented from being melted by the high-temperature particles ejected when the battery cell 50 has thermal runaway, thereby better improving the reliability of the reinforcement structure 20 and better ensuring the thermal insulation function of the insulation pad 100.

[0101] In some implementations, the material of the reinforcement structure 20 is tungsten or molybdenum or titanium alloy or cobalt-based alloy or nickel-based superalloy or silicon carbide or boron carbide or aluminum oxide.

[0102] In the above technical scheme, by making the material of the reinforcement structure 20 adopt tungsten or molybdenum or titanium alloy or cobalt-based alloy or nickel-based superalloy or silicon carbide or boron carbide or aluminum oxide, the reinforcement structure 20 can not only have higher rigidity, but also have higher melting point and better high temperature resistance. In this way, when the battery cell 50 has thermal runaway, the reinforcement structure 20 can be better prevented from being melted by the high-temperature particles ejected when the battery cell 50 has thermal runaway, thereby better improving the reliability of the reinforcement structure 20 and better ensuring the thermal insulation function of the thermal insulation pad 100.

[0103] In some implementations, the material of the reinforcement structure 20 is titanium alloy, silicon carbide, or boron carbide.

[0104] In the above technical solution, by making the material of the reinforcement structure 20 use titanium alloy or silicon carbide or boron carbide, the reinforcement structure 20 not only has higher rigidity, higher melting point and better high temperature resistance, but also can have higher bending strength. When the battery cell 50 swells, the battery cell 50 will squeeze the thermal insulation pad 100 so that the thermal insulation pad 100 will bend and deform. By making the reinforcement structure 20 have higher bending strength, the bending deformation of the thermal insulation pad 100 caused by the squeezing of the battery cell 50 can be reduced. In this way, the thermal insulation pad 100 can maintain better thermal insulation performance, and can make the thermal insulation pad 100 not easy to be damaged, thereby extending the service life of the thermal insulation pad 100.

[0105] In some implementations, the thermal insulation pad body 10 is an aerogel piece.

[0106] In the above technical solution, by setting the insulation pad body 10 as an aerogel piece, utilizing the good thermal insulation effect of the aerogel material itself, and setting a reinforcing structure 20 with greater rigidity on the insulation pad body 10, the overall thermal insulation performance of the insulation pad 100 can be improved.

[0107] In some implementations, reference Figure 2-Figure 4 , at least a portion of the reinforcement structure 20 is embedded in the thermal insulation pad body 10 .

[0108] At least a portion of the reinforcing structure 20 is embedded in the thermal insulation pad body 10, which may include the following situations: for example, a portion of the reinforcing structure 20 is embedded in the thermal insulation pad body 10, and another portion of the reinforcing structure 20 is located outside the thermal insulation pad body 10, and the portion of the reinforcing structure 20 located outside the thermal insulation pad body 10 may be located on one side in the thickness direction of the thermal insulation pad body 10, or may be located on both sides in the thickness direction of the thermal insulation pad body 10; for another example, the entire reinforcing structure 20 is located in the thermal insulation pad body 10.

[0109] In the above technical solution, by embedding at least part of the reinforcing structure 20 into the thermal insulation pad body 10, the stiffness of the thermal insulation pad 100 can be better improved, and the compression resistance of the thermal insulation pad 100 can be better enhanced, so that the thermal insulation performance of the thermal insulation pad 100 is less affected by the expansion of the battery cell 50, and can play a better thermal insulation role, thereby improving the safety, reliability and robustness of the battery device 200.

[0110] In some implementations, reference Figure 8 The thermal insulation pad 100 is used to be clamped between battery cells 50. The pressure relief structure 51 of the battery cell 50 is located at one end of the battery cell 50 along the first direction. The thermal insulation pad body 10 includes a first body portion 11 and a second body portion 12 arranged along the first direction. The first body portion 11 is located on a side of the second body portion 12 close to the pressure relief structure 51. The arrangement density of the reinforcement structure 20 in the first body portion 11 is greater than the arrangement density in the second body portion 12. The first direction is perpendicular to the thickness direction of the thermal insulation pad body 10.

[0111] When the battery cell 50 is working and the pressure inside the battery cell 50 is relatively high, the pressure relief structure 51 of the battery cell 50 can be used to release the high-temperature gas and particulate matter inside the battery cell 50 to the outside of the battery cell 50 to reduce the pressure inside the battery cell 50 .

[0112] The thermal insulation pad 100 is used to be clamped between the battery cells 50 . The battery cells 50 are located on two opposite sides of the thermal insulation pad 100 in the thickness direction, and the large surfaces of the battery cells 50 are opposite to the thermal insulation pad 100 .

[0113] The first direction can refer to the e1 direction in the attached figure. For example, the first direction can be the up-down direction, the pressure relief structure 51 of the battery cell 50 can be located at the upper end of the battery cell 50, and the first body part 11 can be located on the upper side of the second body part 12. When the battery cell 50 is working, if the battery cell 50 has thermal runaway, the pressure relief structure 51 of the battery cell 50 will release the high-temperature gas and particulate matter generated in the battery cell 50. Compared with the second body part 12, these high-temperature particulate matter will fall more on the first body part 11, and the impact on the first body part 11 is relatively greater than that on the second body part 12. By having a larger arrangement density of the reinforcement structure 20 set on the first body part 11, the first body part 11 can have better thermal shock resistance, and the impact of the high-temperature particulate matter ejected from the pressure relief structure 51 by the battery cell 50 on the thermal insulation pad 100 can be reduced.

[0114] In the above technical solution, when thermal runaway occurs in the battery cell 50, the battery cell 50 will spray high-temperature particles to the outside through the pressure relief structure 51. By making the arrangement density of the reinforcing structure 20 provided on the part of the thermal insulation pad body 10 close to the pressure relief structure 51 of the battery cell 50 relatively large, the part of the thermal insulation pad 100 close to the pressure relief structure 51 of the battery cell 50 can have better rigidity and better resistance to thermal shock, making it more resistant to thermal shock of high-temperature particles, thereby improving the stability and reliability of the thermal insulation pad 100.

[0115] In some implementations, reference Figure 2 and Figure 3 The reinforcement structure 20 includes a plurality of reinforcing ribs 21 that cross each other.

[0116] In the above technical solution, by configuring the reinforcing structure as a plurality of reinforcing ribs 21 that cross each other, the strength and rigidity of the reinforcing structure 20 itself can be made higher, thereby effectively reinforcing the thermal insulation pad 100 .

[0117] In some implementations, reference Figure 4 The thickness dimension of the reinforcing rib 21 in the thickness direction of the thermal insulation pad body 10 is C1, the thickness of the thermal insulation pad body 10 is C, and 0.5≤C1 / C≤1.

[0118] In the above technical scheme, by making the ratio of the thickness of the reinforcing rib 21 to the thickness of the insulation pad body 10 not less than 0.5, the overall stiffness of the insulation pad 100 can be made higher, and by making the ratio of the thickness of the reinforcing rib 21 to the thickness of the insulation pad body 10 not greater than 1, the overall thickness of the insulation pad 100 can be made smaller, reducing the space occupied by the insulation pad 100, which is beneficial to making the energy density of the battery device 200 higher, and also enables the insulation pad body 10 to have a sufficient proportion to give full play to its thermal insulation performance; by setting the ratio of the thickness of the reinforcing rib 21 to the thickness of the insulation pad body 10 to between 0.5 and 1, the thermal insulation performance of the insulation pad 100 can be better and the overall thickness of the insulation pad 100 can be made smaller.

[0119] In some implementations, reference Figure 2 and Figure 3 The multiple reinforcing ribs 21 include a first reinforcing rib 211 and a second reinforcing rib 212 that are cross-arranged with each other, the first reinforcing rib 211 extends along the first direction, and the first reinforcing rib 211 is a plurality of first reinforcing ribs 211 arranged at intervals along the second direction, the second reinforcing rib 212 extends along the second direction, and the second reinforcing rib 212 is a plurality of second reinforcing ribs 212 arranged at intervals along the first direction, the second direction intersects with the first direction, and the second direction and the first direction are both perpendicular to the thickness direction of the thermal insulation pad body 10.

[0120] For example, the second direction may refer to the direction e2 in the drawings.

[0121] For example, the thermal insulation pad body 10 may be rectangular, the first direction may be the width direction of the thermal insulation pad body 10 , and the second direction may be the length direction of the thermal insulation pad body 10 .

[0122] In the above technical solution, by making the multiple reinforcing ribs 21 be arranged to include a plurality of first reinforcing ribs 211 extending along the first direction and arranged along the second direction and a plurality of second reinforcing ribs 212 extending along the second direction and arranged along the first direction, the overall structure of the reinforcement structure 20 can be made simple and have higher rigidity and stability, thereby effectively improving the rigidity and stability of the thermal insulation pad 100.

[0123] In some implementations, reference Figure 3 A single first reinforcing rib 211 intersects with multiple second reinforcing ribs 212 to divide the first reinforcing rib 211 into multiple first reinforcing segments 2110. The first reinforcing segment 2110 is located between two adjacent second reinforcing ribs 212. The ratio of the length dimension of the first reinforcing segment 2110 in the first direction to the length dimension of the thermal insulation pad body 10 in the first direction is a, 0.02<a<0.5.

[0124] For example, the length dimension of the first reinforcement section 2110 in the first direction is M, the length dimension of the thermal insulation pad body 10 in the first direction is L1, and the ratio of M to L1 is a.

[0125] The smaller the ratio a of the length dimension of the first reinforcement section 2110 in the first direction to the length dimension of the thermal insulation pad body 10 in the first direction is, the greater the arrangement density of the second reinforcement ribs 212 is.

[0126] In the above technical solution, by limiting the relative length of the first reinforcement segment 2110 of the first reinforcement rib 211, the arrangement density of the second reinforcement rib 212 can be limited. By making a less than 0.5, the arrangement density of the plurality of reinforcement ribs 21 can be made larger. By making a greater than 0.02, the arrangement density of the plurality of reinforcement ribs 21 can be made more reasonable, so that the processing technology of the reinforcement structure 20 is not difficult and the material used for the reinforcement structure 20 can be saved.

[0127] In some implementations, reference Figure 3 A single second reinforcing rib 212 intersects with multiple first reinforcing ribs 211 to divide the second reinforcing rib 212 into multiple second reinforcing segments 2120. The second reinforcing segment 2120 is located between two adjacent first reinforcing ribs 211. The ratio of the length dimension of the second reinforcing segment 2120 in the second direction to the length dimension of the thermal insulation pad body 10 in the second direction is b, 0.02<b<0.5.

[0128] The length dimension of the second reinforcement section 2120 in the first direction is N, the length dimension of the thermal insulation pad body 10 in the first direction is L2, and the ratio of N to L2 is b.

[0129] The smaller the ratio b of the length dimension of the second reinforcement segment 2120 in the second direction to the length dimension of the thermal insulation pad body 10 in the second direction is, the greater the arrangement density of the first reinforcement ribs 211 is.

[0130] In the above technical solution, by limiting the relative length of the second reinforcement segment 2120 of the second reinforcement rib 212, the arrangement density of the first reinforcement rib 211 can be limited. By making b less than 0.5, the arrangement density of the plurality of reinforcement ribs 21 can be made larger. By making b greater than 0.02, the arrangement density of the plurality of reinforcement ribs 21 can be made more reasonable, so that the processing technology of the reinforcement structure 20 is not difficult and the material used for the reinforcement structure 20 can be saved.

[0131] In some implementations, reference Figure 5-Figure 8The thermal insulation pad 100 is used to be clamped between battery cells 50. The pressure relief structure 51 of the battery cell 50 is located at one end of the battery cell 50 along the first direction. The thermal insulation pad body 10 includes a first body portion 11 and a second body portion 12 arranged along the first direction. The first body portion 11 is located on a side of the second body portion 12 close to the pressure relief structure 51. The length dimension of the first reinforcement segment 2110 located at the first body portion 11 in the first direction is M1, and the length dimension of the first reinforcement segment 2110 located at the second body portion 12 in the first direction is M2, and M1<M2.

[0132] The smaller the length dimension of the first reinforcement segment 2110 in the first direction, the greater the arrangement density of the second reinforcement ribs 212. The length dimension M1 of the first reinforcement segment 2110 located at the first main body portion 11 in the first direction is smaller than the length dimension M2 of the first reinforcement segment 2110 located at the second main body portion 12 in the first direction, which means that the arrangement density of the second reinforcement ribs 212 on the first main body portion 11 is greater than the arrangement density of the second reinforcement ribs 212 on the second main body portion 12.

[0133] In the above technical solution, when the thermal insulation pad 100 is clamped between the battery cells 50, the arrangement density of the reinforcing ribs 21 on the first main body part 11 of the thermal insulation pad body 10 close to the pressure relief structure 51 of the battery cell 50 is set to be relatively large. When the battery cell 50 has thermal runaway, the battery cell 50 will spray high-temperature particles to the outside through the pressure relief structure 51. The part of the thermal insulation pad 100 close to the pressure relief structure 51 of the battery cell 50 can have better rigidity and better resistance to thermal shock, making it more resistant to thermal shock of high-temperature particles, thereby improving the stability and reliability of the thermal insulation pad 100.

[0134] In some implementations, reference Figure 5-Figure 8 The thermal insulation pad 100 is used to be clamped between battery cells 50. The pressure relief structure 51 of the battery cell 50 is located at one end of the battery cell 50 along the first direction. The thermal insulation pad body 10 includes a first body portion 11 and a second body portion 12 arranged along the first direction. The first body portion 11 is located on a side of the second body portion 12 close to the pressure relief structure 51. The second reinforcement segment 2120 located at the first body portion 11 has a length dimension N1 in the second direction, and the second reinforcement segment 2120 located at the second body portion 12 has a length dimension N2 in the second direction, and N1<N2.

[0135] The smaller the length dimension of the second reinforcement segment 2120 in the second direction, the greater the arrangement density of the first reinforcement ribs 211. The length dimension N1 of the second reinforcement segment 2120 located at the first main body portion 11 in the second direction is smaller than the length dimension N2 of the second reinforcement segment 2120 located at the second main body portion 12 in the second direction, which means that the arrangement density of the first reinforcement ribs 211 on the first main body portion 11 is greater than the arrangement density of the first reinforcement ribs 211 on the second main body portion 12.

[0136] In the above technical solution, when the thermal insulation pad 100 is clamped between the battery cells 50, the arrangement density of the reinforcing ribs 21 on the first main body part 11 of the thermal insulation pad body 10 close to the pressure relief structure 51 of the battery cell 50 is set to be relatively large. When the battery cell 50 has thermal runaway, the battery cell 50 will spray high-temperature particles to the outside through the pressure relief structure 51. The part of the thermal insulation pad 100 close to the pressure relief structure 51 of the battery cell 50 can have better rigidity and better resistance to thermal shock, making it more resistant to thermal shock of high-temperature particles, thereby improving the stability and reliability of the thermal insulation pad 100.

[0137] In some implementations, the mesh 22 formed by the intersection of multiple reinforcing ribs 21 is in a polygonal, circular or elliptical shape.

[0138] In the above technical solution, by making the mesh 22 formed by the intersection of multiple reinforcing ribs 21 into a polygonal, circular or elliptical shape, the structure of the reinforcing structure 20 can be made simpler and convenient for processing and forming.

[0139] In some implementations, the reinforcing rib 21 is a solid structure or a hollow structure.

[0140] In the above technical solution, by setting the reinforcing rib 21 as a solid structure, the overall rigidity of the reinforcing structure 20 can be made higher. When the reinforcing rib 21 is set as a hollow structure, the material used can be reduced and the weight of the thermal insulation pad 100 can be reduced. When the thermal insulation pad 100 is used for the battery device 200, it is beneficial to improve the energy density of the battery device 200.

[0141] Second, refer to Figure 8 and Fig. 9 The utility model provides a battery device 200, including: a box body 60; a plurality of battery cells 50, arranged in the box body 60; and a thermal insulation pad 100 according to the first embodiment of the utility model, the thermal insulation pad 100 is arranged between adjacent battery cells 50.

[0142] In the above technical solution, the battery device 200 includes the above-mentioned thermal insulation pad 100 and the thermal insulation pad 100 is arranged between the battery cells 50 , which can better play the role of thermal insulation between the battery cells 50 and improve the safety, reliability and robustness of the battery device 200 .

[0143] Thirdly, refer to Fig.10 The utility model provides an electrical device 1000, comprising: a battery device 200 according to the above-mentioned second aspect embodiment of the utility model.

[0144] For example, the electric device 1000 may be a vehicle, and the battery device 200 may be installed at the bottom of the vehicle body 300 .

[0145] In the above technical solution, the electric device 1000 includes the above battery device 200 , which can improve the safety, reliability and robustness of the battery device 200 .

[0146] Refer to the following Figure 1-Figure 4 A thermal insulation mat 100 according to some embodiments of the present invention is described.

[0147] Reference Figure 1-Figure 4 In this embodiment, the thermal insulation pad 100 includes a thermal insulation pad body 10, a reinforcement structure 20, an encapsulation film 30 and a double-sided adhesive layer 40. The reinforcement structure 20 is completely embedded in the thermal insulation pad body 10, and the encapsulation film 30 covers the opposite sides of the thermal insulation pad body 10 in the thickness direction. The side of each encapsulation film 30 facing away from the thermal insulation pad body 10 is provided with a double-sided adhesive layer 40. When the thermal insulation pad 100 is clamped between the battery cells 50, the thermal insulation pad 100 can be glued and fixed to the battery cells 50 through the double-sided adhesive layer 40.

[0148] The thermal insulation pad body 10 is an aerogel piece, and the thermal insulation pad body 10 is rectangular. The reinforcement structure 20 includes a plurality of cross-arranged reinforcing ribs 21, and the plurality of reinforcing ribs 21 include a first reinforcing rib 211 extending along a first direction and a second reinforcing rib 212 extending along a second direction. There are a plurality of first reinforcing ribs 211, and the plurality of first reinforcing ribs 211 are arranged at intervals along the second direction. There are a plurality of second reinforcing ribs 212, and the plurality of second reinforcing ribs 212 are arranged at intervals along the first direction. The plurality of first reinforcing ribs 211 and the plurality of second reinforcing ribs 212 are cross-arranged. The arrangement density of the plurality of reinforcing ribs 21 on the thermal insulation pad body 10 is the same.

[0149] Refer to the following Figure 5-Figure 7 The thermal insulation pad 100 according to other embodiments of the present invention is described.

[0150] Reference Figure 5-Figure 7In this embodiment, the thermal insulation pad 100 includes a thermal insulation pad body 10, a reinforcement structure 20, an encapsulation film 30 and a double-sided adhesive layer 40. The reinforcement structure 20 is completely embedded in the thermal insulation pad body 10, and the encapsulation film 30 covers the opposite sides of the thermal insulation pad body 10 in the thickness direction. The side of each encapsulation film 30 facing away from the thermal insulation pad body 10 is provided with a double-sided adhesive layer 40. When the thermal insulation pad 100 is clamped between the battery cells 50, the thermal insulation pad 100 can be glued and fixed to the battery cells 50 through the double-sided adhesive layer 40.

[0151] The thermal insulation pad body 10 is an aerogel member, and the thermal insulation pad body 10 is rectangular. The reinforcement structure 20 includes a plurality of cross-arranged reinforcing ribs 21, and the plurality of reinforcing ribs 21 include a first reinforcing rib 211 extending along a first direction and a second reinforcing rib 212 extending along a second direction. There are a plurality of first reinforcing ribs 211, and the plurality of first reinforcing ribs 211 are arranged at intervals along the second direction. There are a plurality of second reinforcing ribs 212, and the plurality of second reinforcing ribs 212 are arranged at intervals along the first direction. The plurality of first reinforcing ribs 211 and the plurality of second reinforcing ribs 212 are cross-arranged.

[0152] The thermal insulation pad body 10 includes a first main body portion 11 and a second main body portion 12 arranged along a first direction, wherein the first main body portion 11 is closer to the pressure relief structure 51 of the battery cell 50 than the second main body portion 12, and the arrangement density of the multiple reinforcing ribs 21 on the first main body portion 11 is greater than the arrangement density of the multiple reinforcing ribs 21 on the second main body portion 12.

[0153] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0154] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A thermal insulation pad, characterized in that: include: Thermal insulation pad body; A reinforcing structure, wherein the reinforcing structure is arranged on the thermal insulation pad body, the stiffness of the reinforcing structure is greater than the stiffness of the thermal insulation pad body, and the stiffness P of the reinforcing structure is ≥ 0.1 GPa.

2. The thermal insulation pad according to claim 1, characterized in that: The stiffness P of the reinforcement structure is ≥ 1 GPa.

3. The thermal insulation pad according to claim 2, characterized in that: The stiffness P of the reinforcement structure is ≥10 GPa.

4. The thermal insulation pad according to claim 1, characterized in that: The melting point of the reinforcement structure is greater than the melting point of the thermal insulation pad body.

5. The thermal insulation pad according to claim 1, characterized in that: The melting point of the reinforcement structure is R≥950°C.

6. The thermal insulation pad according to claim 1, characterized in that: The material of the reinforcement structure is tungsten or molybdenum or titanium alloy or cobalt-based alloy or nickel-based super alloy or silicon carbide or boron carbide or aluminum oxide.

7. The thermal insulation pad according to claim 6, characterized in that: The material of the reinforcement structure is titanium alloy, silicon carbide or boron carbide.

8. The thermal insulation pad according to claim 1, characterized in that: The thermal insulation pad body is an aerogel piece.

9. The thermal insulation pad according to any one of claims 1 to 8, characterized in that: At least a portion of the reinforcement structure is embedded in the thermal insulation pad body.

10. The thermal insulation pad according to any one of claims 1 to 8, characterized in that: The thermal insulation pad is used to be clamped between battery cells. The pressure relief structure of the battery cell is located at one end of the battery cell along a first direction. The thermal insulation pad body includes a first body portion and a second body portion arranged along the first direction. The first body portion is located on a side of the second body portion close to the pressure relief structure. The arrangement density of the reinforcement structure in the first body portion is greater than that in the second body portion. The first direction is perpendicular to the thickness direction of the thermal insulation pad body.

11. The thermal insulation pad according to any one of claims 1 to 8, characterized in that: The reinforcement structure includes a plurality of reinforcing ribs intersecting each other.

12. The thermal insulation pad according to claim 11, characterized in that: The thickness dimension of the reinforcing rib in the thickness direction of the thermal insulation pad body is C1, the thickness of the thermal insulation pad body is C, and 0.5≤C1 / C≤1.

13. The thermal insulation pad according to claim 11, characterized in that: The multiple reinforcing ribs include first reinforcing ribs and second reinforcing ribs arranged crosswise with each other, the first reinforcing ribs extend along the first direction, and the first reinforcing ribs are multiple and arranged at intervals along the second direction, the second reinforcing ribs extend along the second direction, and the second reinforcing ribs are multiple and arranged at intervals along the first direction, the second direction intersects with the first direction, and the second direction and the first direction are both perpendicular to the thickness direction of the thermal insulation pad body.

14. The thermal insulation pad according to claim 13, characterized in that: A single first reinforcing rib intersects with a plurality of second reinforcing ribs to divide the first reinforcing rib into a plurality of first reinforcing segments, the first reinforcing segment is located between two adjacent second reinforcing ribs, and a ratio of a length dimension of the first reinforcing segment in the first direction to a length dimension of the thermal insulation pad body in the first direction is a, 0.02<a<0.5; And / or, a single second reinforcing rib intersects with multiple first reinforcing ribs to divide the second reinforcing rib into multiple second reinforcing segments, the second reinforcing segment is located between two adjacent first reinforcing ribs, and the ratio of the length dimension of the second reinforcing segment in the second direction to the length dimension of the insulation pad body in the second direction is b, 0.02<b<0.

5.

15. The thermal insulation pad according to claim 14, characterized in that: The thermal insulation pad is used to be clamped between battery cells, the pressure relief structure of the battery cell is located at one end of the battery cell along a first direction, the thermal insulation pad body includes a first body portion and a second body portion arranged along the first direction, the first body portion is located on a side of the second body portion close to the pressure relief structure, The length dimension of the first reinforcement section located at the first body portion in the first direction is M1, and the length dimension of the first reinforcement section located at the second body portion in the first direction is M2, M1<M2; And / or, the length dimension of the second reinforcement section located at the first main body in the second direction is N1, and the length dimension of the second reinforcement section located at the second main body in the second direction is N2, and N1<N2.

16. The thermal insulation pad according to claim 11, characterized in that: The mesh shape formed by the intersection of multiple reinforcing ribs is polygonal, circular or elliptical.

17. The thermal insulation pad according to claim 11, characterized in that: The reinforcing rib is a solid structure or a hollow structure.

18. A battery device, characterized in that: include: Box; A plurality of battery cells are arranged in the box; The thermal insulation pad according to any one of claims 1-17, wherein the thermal insulation pad is arranged between adjacent battery cells.

19. An electrical device, characterized in that: include: A battery device according to claim 18.

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