Heat preservation structure, battery device and electric equipment

Abstract

The utility model discloses a heat preservation structure, a battery device and electric equipment, the heat preservation structure is used for a battery pack, the heat preservation structure comprises a heat preservation layer and a protective film, the heat preservation layer is used for being arranged on the surface of the battery pack, the protective film is arranged on the surface of the heat preservation layer, and the protective film is a waterproof heat insulation component. The heat preservation structure comprises a heat preservation layer and a protection film, the heat preservation layer is arranged on the surface of the battery pack, the protection film is arranged on the surface of the heat preservation layer, and the protection film is a waterproof heat insulation component, so that the battery pack is not prone to being affected by environment temperature and water inflow under the isolation effect of the heat preservation structure, and the performance stability and the service life of the battery pack are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of battery pack insulation, in particular to a thermal insulation structure, a battery device and electrical equipment. Background Art

[0002] The research and development of new and renewable energy sources and the search for advanced methods to improve energy utilization have become the primary issues of common concern to the world. For a country like my country, which is a large energy producer and consumer, there is a need for both energy conservation and emission reduction and energy growth to support economic development, which requires the vigorous development of the energy storage industry.

[0003] Battery is a common new energy storage device. It converts electrical energy into chemical energy for storage through chemical cells, and converts chemical energy into electrical energy for release when needed. Batteries have the advantages of small size, light weight, and high storage energy density, which can meet the needs of new energy vehicle power sources.

[0004] In the prior art, batteries are easily affected by ambient temperature and water ingress, resulting in performance degradation and shortened service life. Utility Model Content

[0005] The utility model aims to provide a heat preservation structure, a battery device and an electric device, so as to solve the problem in the prior art that the battery is easily affected by the ambient temperature and water ingress, resulting in performance degradation and shortened service life.

[0006] In order to achieve the purpose of the utility model, the utility model provides the following technical solutions:

[0007] In a first aspect, the utility model provides a thermal insulation structure for a battery pack, comprising: a thermal insulation layer, which is used to be arranged on the surface of the battery pack; a protective film, which is arranged on the surface of the thermal insulation layer, and the protective film is a waterproof and heat-insulating component.

[0008] In one embodiment, the protective film is attached to multiple surfaces of the thermal insulation layer.

[0009] In one embodiment, the thermal insulation layer includes a first surface, the first surface is used to face the battery pack, and the protective film is attached to other surfaces of the thermal insulation layer except the first surface.

[0010] In one embodiment, the material of the protective film is any one of aluminum foil, polyurethane and polystyrene.

[0011] In one embodiment, there are multiple thermal insulation layers, and the multiple thermal insulation layers are respectively used to be arranged on different surfaces of the battery pack.

[0012] In one embodiment, the thermal insulation layer is thermal insulation cotton, and the thermal insulation cotton includes a heat insulation part and a water insulation part, and the water insulation part is coated on the outer surface of the heat insulation part.

[0013] In one embodiment, the thermal insulation layer is a thermal insulation board, and the interior of the thermal insulation board has a cavity isolated from the outside.

[0014] In one embodiment, there are a plurality of cavities, and the plurality of cavities are distributed in an array in a first direction, and / or the plurality of cavities are distributed in an array in a second direction, and the first direction and the second direction intersect.

[0015] In one embodiment, the insulation board includes: a bottom plate; a top plate, arranged relative to the bottom plate in a third direction, wherein the third direction is perpendicular to both the first direction and the second direction; a plurality of side plates, connected around the bottom plate and the top plate, wherein the bottom plate, the top plate and the plurality of side plates enclose an enclosed space; a connecting plate, arranged in the enclosed space, wherein the connecting plate is connected to the bottom plate and the top plate, and wherein the connecting plate divides the enclosed space into a plurality of cavities.

[0016] In one embodiment, the plurality of side panels include a first side panel and a second side panel, the first side panel extends along the first direction, and the second side panel extends along the second direction; there are a plurality of connecting panels, the plurality of connecting panels extend along the first direction and / or the second direction, and equally divide the enclosed space in the first direction and / or the second direction.

[0017] In one embodiment, the heat preservation plate further includes a reinforcing plate, wherein the reinforcing plate is connected to at least one inner wall surface of the cavity, and the reinforcing plate extends along the first direction or the second direction.

[0018] In one embodiment, in the orthographic projection in the second direction, the cross-sectional shape of the inner wall profile of the cavity is polygonal, elliptical or circular.

[0019] In one embodiment, the inner wall surface of each of the cavities has a first spacing L in the first direction and a second spacing H in the third direction, satisfying: 1 / 2≤L / H≤10 / 1, and H≤8mm, L and H are measured in the same unit, and the third direction is perpendicular to both the first direction and the second direction.

[0020] In one embodiment, the Grashof number of the insulation board in the third direction is ≤2425.

[0021] In a second aspect, the utility model further provides a battery device, comprising a battery pack and a heat preservation structure as described in any one of the various embodiments of the first aspect, wherein the heat preservation structure is arranged on an outer surface of the battery pack.

[0022] In one embodiment, the thermal insulation structure is arranged on two surfaces of the battery pack opposite to each other in a first direction, and / or the thermal insulation structure is arranged on two surfaces of the battery pack opposite to each other in a second direction, and / or the thermal insulation structure is arranged on two surfaces of the battery pack opposite to each other in a third direction; the first direction, the second direction and the third direction are perpendicular to each other.

[0023] In a third aspect, the utility model further provides an electrical device, comprising an electrical device and a battery device as described in any one of the various embodiments of the second aspect, wherein the battery device supplies power to the electrical device.

[0024] By setting a thermal insulation structure for a battery pack, the thermal insulation structure includes a thermal insulation layer and a protective film. The thermal insulation layer is used to be set on the surface of the battery pack, and the protective film is set on the surface of the thermal insulation layer. The protective film is a waterproof and heat-insulating component. The battery pack is not easily affected by the ambient temperature and water ingress due to the insulating effect of the thermal insulation structure, thereby ensuring the stability of the battery pack performance and service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 is a structural diagram of a battery device according to an embodiment;

[0027] Figure 2 is a structural diagram of a battery device according to another embodiment;

[0028] Figure 3 is a structural diagram of a battery device according to another embodiment;

[0029] Figure 4 is a structural diagram of a thermal insulation board of an embodiment;

[0030] Figure 5 is a top cross-sectional view of an insulation board of an embodiment;

[0031] Figure 6 is a top cross-sectional view of an insulation board of another embodiment;

[0032] Figure 7 is a top cross-sectional view of an insulation board of another embodiment;

[0033] Figure 8 is a top cross-sectional view of an insulation board of another embodiment;

[0034] Fig. 9 is a side cross-sectional view of an insulation board of an embodiment;

[0035] Fig.10 is a side cross-sectional view of an insulation board of another embodiment;

[0036] Fig.11 is a side cross-sectional view of an insulation board of an embodiment;

[0037] Fig.12 is a side cross-sectional view of an insulation board of another embodiment;

[0038] Fig.13 is a side cross-sectional view of an insulation board of another embodiment;

[0039] Fig.14 is a side cross-sectional view of an insulation board of another embodiment;

[0040] Fig.15 is a side cross-sectional view of an insulation board of another embodiment;

[0041] Fig.16 is a side cross-sectional view of an insulation board of another embodiment;

[0042] Fig.17 is a side cross-sectional view of an insulation board of another embodiment;

[0043] Fig.18 It is a side cross-sectional view of an insulation board according to another embodiment.

[0044] Description of reference numerals:

[0045] 1000-battery device;

[0046] 100-Insulation structure;

[0047] 10-insulation layer, 11-first surface;

[0048] 20-protective film;

[0049] 30- thermal insulation cotton, 31- heat insulation part, 32- water insulation part;

[0050] 40-insulation plate, 41-cavity, 42-bottom plate, 43-top plate, 44-side plate, 45-connecting plate, 46-first side plate, 47-second side plate, 48-reinforcement plate;

[0051] 200-battery pack;

[0052] X-first direction, Y-second direction, Z-third direction;

[0053] L-first distance, H-second distance. DETAILED DESCRIPTION

[0054] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments 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.

[0055] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there can be a central component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time.

[0056] Unless otherwise defined, all technical and scientific terms used in this utility model have the same meaning as those commonly understood by technicians in the technical field of this utility model. The terms used in the specification of this utility model are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The term "and / or" used in this utility model includes any and all combinations of one or more related listed items.

[0057] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0058] Please refer to Figure 1 The present invention provides an electrical equipment (not shown), including an electrical device (not shown) and a battery device 1000 in an embodiment of the present invention, and the battery device 1000 supplies power to the electrical device. The electrical equipment may be a vehicle, a household appliance, a commercial appliance, an industrial appliance, etc., without limitation. The electrical device may be a driving device, a light-emitting device, a refrigeration device, a heating device, etc., without limitation. The battery device 1000 in an embodiment of the present invention may be a power battery, a household energy storage battery, a commercial energy storage battery, an industrial energy storage battery, etc., without limitation.

[0059] The electrical equipment uses the electrical device and the battery device 1000 in the embodiment of the utility model, so that the battery device 1000 stores electrical energy and supplies power to the electrical device, while improving the thermal insulation performance and thermal management performance of the battery device 1000. The battery device 1000 is not easily affected by the ambient temperature, thereby ensuring the performance level, service life and structural integrity of the battery device 1000.

[0060] Please refer to Figure 1The embodiment of the utility model further provides a battery device 1000, including a battery pack 200 and a heat preservation structure 100 in the embodiment of the utility model, wherein the heat preservation structure 100 is arranged on the outer surface of the battery pack 200. Optionally, the heat preservation structure 100 and the battery pack 200 can be connected and fixed by bonding, clamping, magnetic attraction, etc., without limitation.

[0061] The battery pack 200 includes components such as interfaces, switches, and fixing structures (not shown), which cannot be blocked or protrude from the outer surface of the battery pack 200 for connecting with the insulation structure 100. Optionally, the insulation structure 100 in the embodiment of the utility model may have multiple openings (not shown), and the multiple openings are arranged corresponding to the aforementioned interfaces, switches, and fixing structures, so that the interfaces, switches, and fixing structures are not blocked, so that the battery can be electrically connected to the electrical device, connected and fixed to the fixed base (not shown), and convenient for personnel to operate.

[0062] Optionally, the battery pack 200 may be a square battery, a cylindrical battery, a sheet battery, etc., without limitation. The shape of the heat preservation structure 100 in the embodiment of the utility model is set corresponding to the shape of the battery pack 200, so that the heat preservation structure 100 can be connected with the outer surface of the battery pack 200, so that the battery pack 200 is not easily affected by the external temperature. Optionally, the heat preservation structure 100 may be a plate-like structure, a membrane-like structure, a heat preservation liquid, etc., arranged on the outer surface of the battery pack 200, without limitation.

[0063] The battery device 1000 achieves storage and output of electric energy through the battery pack 200 and the thermal insulation structure 100 in the embodiment of the utility model, while improving the thermal insulation performance and thermal management performance of the battery device 1000. The battery pack 200 is not easily affected by the ambient temperature, thereby ensuring the performance level, service life and structural integrity of the battery pack 200.

[0064] Please refer to Figure 1 The thermal insulation structure 100 is disposed on two opposite surfaces of the battery pack 200 in a first direction X, and / or the thermal insulation structure 100 is disposed on two opposite surfaces of the battery pack 200 in a second direction Y, and / or the thermal insulation structure 100 is disposed on two opposite surfaces of the battery pack 200 in a third direction Z, and the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0065] Optionally, a plurality of thermal insulation structures 100 may be connected to any one of the surfaces of the battery pack 200, and adjacent thermal insulation structures 100 on the same surface may be closely arranged to ensure the thermal insulation performance of the thermal insulation structure 100. Optionally, the thermal insulation structure 100 on one of the surfaces of the battery pack 200 may protrude from the edge of the surface and be closely arranged with the thermal insulation structure 100 on another adjacent surface to ensure the thermal insulation performance of the thermal insulation structure 100.

[0066] By arranging the thermal insulation structure 100 on two surfaces of the battery pack 200 opposite to each other in the first direction X, and / or, the thermal insulation structure 100 is arranged on two surfaces of the battery pack 200 opposite to each other in the second direction Y, and / or, the thermal insulation structure 100 is arranged on two surfaces of the battery pack 200 opposite to each other in the third direction Z, the first direction X, the second direction Y and the third direction Z are perpendicular to each other, so that multiple thermal insulation structures 100 can fully cover the outer surface of the battery pack 200, ensure the thermal insulation performance of the thermal insulation structure 100, improve the thermal insulation performance and thermal management performance of the battery device 1000, the battery pack 200 is not easily affected by the ambient temperature, and the performance level, service life and structural integrity of the battery pack 200 are ensured.

[0067] The thermal insulation structure 100 of the embodiment of the utility model is described in detail below.

[0068] Please refer to Figure 1 The embodiment of the utility model further provides a thermal insulation structure 100 for a battery pack 200 , wherein the thermal insulation structure 100 includes a thermal insulation layer 10 and a protective film 20 .

[0069] The thermal insulation layer 10 is used to be arranged on the surface of the battery pack 200. Optionally, the thermal insulation layer 10 and the battery pack 200 can be connected by means of clamping, bonding and welding, without limitation. Optionally, the thermal insulation layer 10 can be made of a material with low thermal conductivity, low water absorption, not easy to age and corrode, and having high compressive strength, specifically polyethylene, polypropylene and polyurethane, etc., without limitation. Optionally, the outer surface of the thermal insulation layer 10 is smooth and flat without pores, so that the thermal insulation layer 10 is not easy to penetrate water, resulting in a decrease in the thermal insulation performance of the thermal insulation layer 10.

[0070] The protective film 20 is disposed on the surface of the thermal insulation layer 10, and the protective film 20 is a waterproof and heat-insulating component. Optionally, the protective film 20 is made of a material with a dense microstructure, high temperature resistance, strong heat radiation reflection ability and stable chemical properties, so that external moisture or water vapor is not easy to penetrate through the protective film to reach the thermal insulation layer 10 and the battery pack 200, while reducing or eliminating the impact of external heat radiation on the battery pack 200. Optionally, the protective film 20 and the thermal insulation layer 10 can be connected by bonding, hot melting and electrolysis, etc., without limitation.

[0071] By setting up a thermal insulation structure 100 for the battery pack 200, the thermal insulation structure 100 includes a thermal insulation layer 10 and a protective film 20. The thermal insulation layer 10 is used to be set on the surface of the battery pack 200, and the protective film 20 is set on the surface of the thermal insulation layer 10. The protective film 20 is a waterproof and heat-insulating component. The battery pack 200 is not easily affected by the ambient temperature and water ingress under the insulating effect of the thermal insulation structure 100, thereby ensuring the stability of the performance and service life of the battery pack 200.

[0072] Please refer to Figure 1 The protective film 20 is attached to multiple surfaces of the thermal insulation layer 10. Optionally, the protective film 20 is attached to one or two surfaces of the thermal insulation layer 10 in the first direction X, and / or, the protective film 20 is attached to one or two surfaces of the thermal insulation layer 10 in the second direction Y, and / or, the protective film 20 is attached to one or two surfaces of the thermal insulation layer 10 in the third direction Z, without limitation, and the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0073] Optionally, a plurality of protective films 20 may be attached to any surface of the thermal insulation layer 10 , and any two adjacent protective films 20 are connected so that the protective films 20 can adapt to the shape of the thermal insulation layer 10 when the thermal insulation layer 10 is in an irregular shape.

[0074] By providing a protective film 20 attached to multiple surfaces of the insulation layer 10, multiple surfaces of the insulation layer 10 are isolated from the outside world by the protective film 20, thereby reducing the impact of external heat radiation and moisture on the insulation layer 10, further improving the insulation performance and waterproof performance of the insulation structure 100, and ensuring the stability of the performance and service life of the battery pack 200.

[0075] Please refer to Figure 1 The insulation layer 10 includes a first surface 11, and the first surface 11 is used to face the battery pack 200. The protective film 20 is attached to the other surfaces of the insulation layer 10 except the first surface 11. Optionally, the first surface 11 and the battery pack 200 can be connected and fixed by bonding, snapping, and magnetic attraction, without limitation. Optionally, the protective film 20 on multiple surfaces of the insulation layer 10 except the first surface 11 can be an integrated structure, or can be connected by hot melting and bonding to prevent gaps in the protective film 20.

[0076] By setting the thermal insulation layer 10 to include a first surface 11, the first surface 11 is used to face the battery pack 200, and the protective film 20 is attached to the other surfaces of the thermal insulation layer 10 except the first surface 11. Compared with attaching the protective film 20 to the first surface 11 and then connecting it with the battery pack 200, in this solution, the first surface 11 is directly connected to the battery pack 200, so that the thermal insulation layer 10 is not easily separated from the battery pack 200 due to aging and falling off of the protective film 20, thereby ensuring the stability of the connection between the thermal insulation structure and the battery pack 200.

[0077] Please refer to Figure 1 The material of the protective film 20 is any one of aluminum foil, polyurethane and polystyrene. Optionally, the protective film 20 can also be a combination of the aforementioned multiple materials, without limitation. Exemplarily, the protective film 20 can be a composite aluminum-plastic film, that is, an organic material such as polystyrene is added to the surface of the aluminum foil facing away from the thermal insulation layer 10.

[0078] By setting the material of the protective film 20 to be any one of aluminum foil, polyurethane and polystyrene, the water absorption rate, water permeability and heat insulation performance of the protective film 20 are relatively strong, and it can effectively isolate external heat radiation and moisture, so that the battery pack 200 is not easily affected by external high temperature and water ingress, thereby ensuring the stability of the performance and service life of the battery pack 200.

[0079] Please refer to Figure 1 , there are multiple insulation layers 10, and the multiple insulation layers 10 are respectively used to be set on different surfaces of the battery pack 200. Optionally, multiple insulation layers 10 can be connected to any one surface of the battery pack 200, and adjacent insulation layers 10 on the same surface are closely arranged to ensure the thermal insulation performance of the insulation layer 10. Optionally, the insulation layer 10 on one surface of the battery pack 200 can protrude from the edge of the surface and be closely arranged with the insulation layer 10 on another adjacent surface to ensure the thermal insulation performance of the insulation layer 10.

[0080] By providing a plurality of thermal insulation layers 10, the plurality of thermal insulation layers 10 are respectively used to be provided on different surfaces of the battery pack 200, so that the plurality of thermal insulation layers 10 can fully cover the outer surface of the battery pack 200, thereby ensuring the heat insulation performance of the thermal insulation layer 10, improving the thermal insulation performance and thermal management performance of the battery device 1000, and the battery pack 200 is not easily affected by the ambient temperature, thereby ensuring the performance level and service life of the battery pack 200.

[0081] Please refer to Figure 2 The heat-insulating layer 10 is a heat-insulating cotton 30, and the heat-insulating cotton 30 includes a heat-insulating portion 31 and a water-insulating portion 32, and the water-insulating portion 32 is coated on the outer surface of the heat-insulating portion 31. Optionally, the heat-insulating portion 31 can be made of a material with good heat-insulating performance, stable chemical properties, and easy processing and molding, and can be polyurethane, polyethylene, polypropylene, EPDM rubber, etc., without limitation. Optionally, the water-insulating portion 32 can be formed by the outer surface of the heat-insulating portion 31 through oxidation reaction, photochemical reaction, and attachment of waterproof materials, etc., without limitation.

[0082] By setting the thermal insulation layer 10 as thermal insulation cotton 30, the thermal insulation cotton 30 includes a heat insulation part 31 and a water insulation part 32, and the water insulation part 32 is coated on the outer surface of the heat insulation part 31, so that the heat insulation part 31 and the water insulation part 32 can provide a vibration reduction effect on the battery pack 200 while isolating the external heat radiation and moisture, thereby preventing the battery pack 200 from being damaged by impact.

[0083] Please refer to Figure 3 and Figure 4, the insulation layer 10 is an insulation board 40, and the insulation board 40 has a cavity 41 inside that is isolated from the outside. Optionally, the insulation board 40 can be made of a material with low thermal conductivity, low water absorption, not easy to age and corrode, and high compressive strength, specifically polyethylene, polypropylene, and polyurethane, etc., without limitation. Compared with using insulation cotton 30 as the insulation material of the device to be insulated, the insulation board 40 in the embodiment of the utility model has a higher structural strength and is not easy to tear or break. Optionally, the outer surface of the insulation board 40 is smooth and flat without pores, so that the insulation board 40 is not easy to penetrate water and cause the insulation performance of the insulation board 40 to decrease.

[0084] Optionally, there may be one or more cavities 41, without limitation. Optionally, the cavity 41 is filled with a gas with a low thermal conductivity, specifically air, argon, krypton, xenon, etc., without limitation. Optionally, the aforementioned exterior isolated from the cavity 41 may be the exterior space of the thermal insulation structure 100, or the exterior space of a single cavity 41, without limitation.

[0085] By setting the insulation layer as an insulation board 40, the insulation board 40 has a cavity 41 inside which is isolated from the outside, so that the insulation board 40 can effectively reduce the impact of the ambient temperature on the insulation device, thereby ensuring the performance level, service life and structural integrity of the insulation device, and the insulation structure 100 has a low water absorption rate and is not easy to be infiltrated by water and corroded.

[0086] Please refer to Figures 4 to 10 There are multiple cavities 41, and the multiple cavities 41 are distributed in an array in the first direction X and / or the second direction Y, and the first direction X is perpendicular to the second direction Y. Optionally, the multiple cavities 41 may extend along a straight line or a curve in the first direction X and / or the second direction Y, without limitation.

[0087] Optional, please refer to Figure 5 The plurality of cavities 41 extend along the second direction Y and are distributed in an array in the first direction X. The array of cavities 41 has a simple structure, strong structural strength, low production cost, strong impact resistance, and is not easily deformed or damaged.

[0088] Optional, please refer to Figure 6 , multiple cavities 41 extend along the first direction X and are distributed in an array in the second direction Y. The structure of the thermal insulation structure 100 is similar to the aforementioned thermal insulation structure 100 having multiple cavities 41 extending along the second direction Y, and is only for reference and will not be described in detail.

[0089] Optional, please refer to Figure 7 The plurality of cavities 41 are distributed in an array in the first direction X and the second direction Y. The thermal insulation structure 100 has a plurality of cavities 41 distributed in an array in the first direction X and the second direction Y. The plurality of cavities 41 are arranged in a rectangular array.

[0090] Compared with the cavity 41 extending along the first direction X or the second direction Y, the volume of the plurality of cavities 41 arrayed in the first direction X and the second direction Y is smaller, and the fluidity of the gas in the cavity 41 is lower, so that the thermal insulation performance of different parts of the thermal insulation structure 100 does not affect each other. When a single cavity 41 is damaged, the other cavities 41 of the thermal insulation structure 100 still have thermal insulation capabilities, so that the thermal insulation structure 100 still has certain thermal insulation and waterproof capabilities. At the same time, the structural strength of the thermal insulation structure 100 is further improved, which greatly increases the impact resistance of the thermal insulation structure 100 and is not easy to deform and damage.

[0091] Optional, reference Figure 8 , any two adjacent rows of multiple cavities 41 extending along the second direction Y may be staggered. Optionally, any two adjacent rows of cavities 41 extending along the first direction X may be staggered. Optionally, in the first direction X and the second direction Y, any two adjacent cavities 41 may be staggered. By providing a plurality of staggered cavities 41, the structural strength of the thermal insulation structure 100 is further enhanced compared to the plurality of cavities 41 distributed in a rectangular array. When the thermal insulation structure 100 is impacted, the thermal insulation structure 100 can transmit the external force array to other parts, so that the thermal insulation structure 100 is not easily deformed or damaged.

[0092] Optional, please refer to Fig. 9 In the third direction Z, the plurality of cavities 41 may be distributed in a multi-layer array, and the third direction Z is perpendicular to both the first direction X and the second direction Y. Optionally, the number of layers of the cavities 41 in the third direction Z may be 2, 3, 4, etc., without limitation. By providing multiple layers of cavities 41 in the third direction Z, the thermal insulation capacity of the thermal insulation structure 100 with multiple layers of thermal insulation layers is further enhanced compared to the structure of a single layer of cavities 41, and at the same time, the structural strength of the thermal insulation structure 100 is effectively improved, so that the thermal insulation structure 100 is not easily deformed or damaged.

[0093] Optional, please refer to Fig.10 In the third direction Z, the multiple cavities 41 of any two adjacent layers can be staggered. By providing the staggered multi-layer cavities 41, the structural strength of the thermal insulation structure 100 is further enhanced compared with the multi-layer cavities 41 that are directly distributed. When the thermal insulation structure 100 is impacted, the thermal insulation structure 100 can transmit the external force array to other parts, so that the thermal insulation structure 100 is not easily deformed or damaged.

[0094] By setting a plurality of cavities 41, the plurality of cavities 41 can be distributed in an array in the first direction X and / or the second direction Y and / or the third direction Z, or can be distributed in a staggered manner. The plurality of cavities 41 can be extended along a straight line or along a curve, so that the thermal insulation structure 100 can have a variety of different structures and different structural strengths, so that the thermal insulation structure 100 can exert its heat insulation and waterproof capabilities in complex and diverse environments, effectively improving the practicability and adaptability of the thermal insulation structure 100 and expanding the scope of use of the thermal insulation structure 100.

[0095] Please refer to Figure 4 The thermal insulation structure 100 includes a bottom plate 42, a top plate 43, a plurality of side plates 44 and a connecting plate 45. The top plate 43 and the bottom plate 42 are arranged relative to each other in the third direction Z, and the third direction Z is perpendicular to both the first direction X and the second direction Y. The plurality of side plates 44 are connected around the bottom plate 42 and the top plate 43. The bottom plate 42, the top plate 43 and the plurality of side plates 44 enclose a closed space. The connecting plate 45 is arranged in the closed space. The connecting plate 45 is connected to the bottom plate 42 and the top plate 43. The connecting plate 45 divides the closed space into a plurality of cavities 41.

[0096] Optionally, the bottom plate 42 and / or the top plate 43 may be circular, elliptical, polygonal, etc., without limitation, so that the selection of the insulation structure 100 is compatible with the shape of the device to be insulated, so that the insulation structure 100 can fully cover the outer surface of the device to be insulated, reduce the impact of the ambient temperature on the device to be insulated, and at the same time save the space and materials occupied by the insulation structure 100, thereby improving the integrity and compactness of the product, reducing space occupancy, and reducing production material costs.

[0097] Optionally, the multiple side panels 44 can be an integrated structure with the bottom plate 42 and the top plate 43, or can be connected to the bottom plate 42 and the top plate 43 by hot melting, bonding, and clamping, etc., without limitation. Optionally, the multiple side panels 44 can be an integrated structure, and the multiple side panels 44 are sequentially connected end to end to form a ring structure, and are sleeved around the bottom plate 42 and the top plate 43. Optionally, the connecting plate 45 can isolate the multiple cavities 41, or can be provided with through holes, without limitation. The through holes are used to connect the multiple cavities 41, so that the gas in the thermal insulation structure 100 flows after being heated to transfer local heat to other cavities 41 of the thermal insulation structure 100, so that the thermal insulation structure 100 has uniform thermal insulation capacity.

[0098] By setting a bottom plate 42, a top plate 43, multiple side plates 44 and a connecting plate 45, the top plate 43 and the bottom plate 42 are arranged relative to each other in the third direction Z, and the third direction Z is perpendicular to the first direction X and the second direction Y. The multiple side plates 44 are connected around the bottom plate 42 and the top plate 43. The bottom plate 42, the top plate 43 and the multiple side plates 44 enclose a closed space. The connecting plate 45 is arranged in the closed space, and the connecting plate 45 is connected to the bottom plate 42 and the top plate 43. The connecting plate 45 divides the closed space into multiple cavities 41, so that the thermal insulation structure 100 has a strong thermal insulation performance, so that the device to be insulated is not easily affected by the ambient temperature, thereby ensuring the performance level, service life and structural integrity of the device to be insulated, and the thermal insulation structure 100 has a low water absorption rate and is not easy to be water-infiltrated and corroded.

[0099] Please refer to Figure 4 The plurality of side plates 44 include a first side plate 46 and a second side plate 47. The first side plate 46 extends along the first direction X, and the second side plate 47 extends along the second direction Y. There are a plurality of connecting plates 45. The connecting plates 45 extend along the first direction X and / or the second direction Y, and equally divide the enclosed space in the first direction X and / or the second direction Y.

[0100] Optionally, at least two first side panels 46 are disposed at opposite ends of the bottom panel 42 and the top panel 43 in the second direction Y, and close the opening of the aforementioned enclosed space in the second direction Y. Optionally, multiple first side panels 46 may be individually connected to the openings of multiple cavities 41, and together with the second side panels 47 or the connecting panels 45 close the cavities 41 to isolate the cavities 41 from the outside. Optionally, the structure of the second side panel 47 is similar to that of the first side panel 46, and reference can be made thereto without further description.

[0101] Optionally, multiple connecting plates 45 can be staggered in the first direction X and / or the second direction Y to form cavities 41 staggered in the first direction X and / or the second direction Y, so that the insulation structure 100 can have a variety of different structures, so that the insulation structure 100 can exert its heat insulation and waterproof capabilities in complex and diverse environments, effectively improving the practicality and adaptability of the insulation structure 100 and expanding the scope of use of the insulation structure 100.

[0102] By providing the first side plate 46 and the second side plate 47, the first side plate 46 extends along the first direction X, and the second side plate 47 extends along the second direction Y. There are multiple connecting plates 45, and the multiple connecting plates 45 extend along the first direction X and / or the second direction Y, and equally divide the closed space in the first direction X and / or the second direction Y, so that the insulation structure 100 has multiple uniformly distributed cavities 41 inside, and the multiple cavities 41 are isolated from the outside, so that the insulation structure 100 has a strong heat insulation ability, ensuring the performance level, service life and structural integrity of the device to be insulated, and at the same time, the insulation structure 100 has a low water absorption rate and is not easy to be water-infiltrated and corroded.

[0103] Please refer to Figure 4 , the thermal insulation structure 100 also includes a reinforcing plate 48, which is connected to at least one inner wall surface of the cavity 41, and the reinforcing plate 48 extends along the first direction X or the second direction Y. Optionally, the two ends of the reinforcing plate 48 can be connected to the side plate 44 or the connecting plate 45, respectively, or can be connected to the bottom plate 42 and the top plate 43, respectively, without limitation. Optionally, one end of the reinforcing plate 48 can be connected to the connection between the bottom plate 42 and the side plate 44 (or the connecting plate 45), and the other end can be connected to the connection between the top plate 43 and the side plate 44 (or the connecting plate 45), without limitation. Optionally, there can be multiple reinforcing plates 48, and multiple reinforcing plates 48 can be arranged in parallel or staggered, without limitation. Optionally, the reinforcing plate 48 and the top plate 43, the bottom plate 42, the connecting plate 45 and the side plate 44 enclose a plurality of cavities 41.

[0104] By setting a reinforcing plate 48, the reinforcing plate 48 is connected to at least one inner wall surface of the cavity 41, and the reinforcing plate 48 extends along the first direction X or the second direction Y, and can be connected to the inner wall surface of the cavity 41 along any direction. There can be multiple reinforcing plates 48, so that the structural strength of the insulation structure 100 is further improved, and the impact resistance of the insulation structure 100 is greatly increased, and it is not easy to be deformed and damaged.

[0105] In another embodiment, the thermal insulation structure 100 further includes reinforcing ribs (not shown), and the connection between the reinforcing ribs and the top plate 43, the bottom plate 42, the connecting plate 45 and the side plate 44 is similar to the aforementioned reinforcing plate 48, which can be referred to and will not be described in detail. Optionally, there may be multiple reinforcing ribs, and the multiple reinforcing ribs are evenly distributed in the multiple cavities 41 and connected to the inner wall surface of the cavity 41. Optionally, the reinforcing ribs may be columns, spheres, mesh structures, etc., without limitation.

[0106] By setting reinforcing ribs, the reinforcing ribs can be connected to the inner wall surface of the cavity 41 in any direction, and there can be multiple reinforcing ribs, so that the structural strength of the insulation structure 100 is further improved, and the impact resistance of the insulation structure 100 is greatly increased, and it is not easy to deform and damage.

[0107] Please refer to Figures 11 to 18 In the orthographic projection on the second direction Y, the cross-sectional shape of the inner wall surface profile of the cavity 41 is polygonal, elliptical or circular, etc.

[0108] Optional, such as Fig.11 The cross-sectional shape of the inner wall profile of the cavity 41 may be a " " shape.

[0109] Optional, such as Fig.12 The cross-sectional shape of the inner wall profile of the cavity 41 may be a rectangle.

[0110] Optional, such as Fig.13The cross-sectional shape of the inner wall profile of the cavity 41 may be circular.

[0111] Optional, such as Fig.14 The cross-sectional shape of the inner wall profile of the cavity 41 may be an ellipse.

[0112] Optional, such as Fig.15 The cross-sectional shape of the inner wall profile of the cavity 41 may be a rhombus.

[0113] Optional, such as Fig.16 The cross-sectional shape of the inner wall profile of the cavity 41 may be a triangle.

[0114] Optional, such as Fig.17 The cross-sectional shape of the inner wall profile of the cavity 41 may be a hexagon.

[0115] Optional, such as Fig.18 The cross-sectional shape of the inner wall profile of the cavity 41 may be a parallelogram.

[0116] In addition to the cross-sectional shape of the inner wall surface profile of the cavity 41 described above, it may also be a cross-shaped shape, a wing shape, a multi-layer composite shape, etc., without limitation.

[0117] By setting the cross-sectional shape of the inner wall surface profile of the cavity 41 to be polygonal, elliptical or circular, etc., the thermal insulation structure 100 can have a variety of different structures and different structural strengths, so that the thermal insulation structure 100 can exert its heat insulation and waterproof capabilities in complex and diverse environments, effectively improving the practicality and adaptability of the thermal insulation structure 100 and expanding the scope of use of the thermal insulation structure 100.

[0118] Please refer to Fig.12 The inner wall surface of each cavity 41 has a first spacing L in the first direction X and a second spacing H in the third direction Z, satisfying: 1 / 2≤L / H≤10 / 1, and H≤8mm (millimeter), L and H are measured in the same unit, and the third direction Z is perpendicular to the first direction X and the second direction Y.

[0119] Optionally, the first spacing L is the maximum spacing distance of the inner wall surface of the cavity 41 in the first direction X. Optionally, the second spacing H is the maximum spacing distance of the inner wall surface of the cavity 41 in the third direction Z. When L / H < 1 / 2, the total volume of the cavity 41 is too small, so that the thermal insulation effect is reduced. When L / H > 10 / 1, or when H > 8 mm, the volume of the cavity 41 is too large, so that the fluidity of the gas in the cavity 41 increases, and the thermal insulation performance is reduced.

[0120] By setting the inner wall surface of each cavity 41 to have a first spacing L in the first direction X and a second spacing H in the third direction Z, it satisfies: 1 / 2≤L / H≤10 / 1, and H≤8mm (millimeter), L and H are measured in the same unit, and the third direction Z is perpendicular to the first direction X and the second direction Y. While the cavity 41 has a strong heat insulation ability, the insulation structure 100 has a structural strength that meets the working requirements, so that the device to be insulated is not easily affected by the ambient temperature, thereby ensuring the performance level, service life and structural integrity of the device to be insulated, and the insulation structure 100 is not easy to be torn or damaged.

[0121] Please refer to Fig.12 When the application scenario is more complicated and the second spacing H is greater than 8 mm, it is necessary to ensure that the Grashof number of the thermal insulation structure 100 in the third direction Z is ≤ 2425. When the Grashof number is greater than 2425, the flow rate of the gas in the cavity 41 is too fast when heated, which increases the thermal conductivity of the gas and reduces the thermal insulation capacity.

[0122] Among them, the Grashof number is of great significance in heat transfer. It reflects the relative magnitude of the buoyancy and viscosity of the fluid, and is a similar criterion for describing the intensity of natural convection heat transfer. The larger the Grashof number, the more unstable the natural convection boundary layer will gradually become, and the flow state will change from laminar flow to turbulent flow. In addition, the Grashof number is also an important parameter for the effect of buoyancy on reaction heat transfer. Therefore, when studying the heat transfer process, the Grashof number is a very important parameter that can help us understand the heat transfer characteristics of the fluid under natural convection conditions, thereby optimizing the heat transfer process and improving the heat transfer efficiency.

[0123] By setting the Grashof number of the insulation structure 100 in the third direction Z to ≤2425, the shape or size of the insulation structure 100 needs to be adapted according to the application scenario, which results in that when the second spacing H>8mm, the insulation structure 100 still has a strong heat-insulating ability, so that the device to be insulated is not easily affected by the ambient temperature, thereby ensuring the performance level, service life and structural integrity of the device to be insulated.

[0124] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship of terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientation or positional relationship described in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0125] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A heat preservation structure for a battery pack, characterized in that: include: A thermal insulation layer, used to be arranged on the surface of the battery pack; The protective film is arranged on the surface of the thermal insulation layer, and the protective film is a waterproof and heat-insulating component.

2. The thermal insulation structure according to claim 1, characterized in that: The protective film is attached to multiple surfaces of the thermal insulation layer.

3. The thermal insulation structure according to claim 2, characterized in that: The thermal insulation layer includes a first surface, the first surface is used to face the battery pack, and the protective film is attached to other surfaces of the thermal insulation layer except the first surface.

4. The thermal insulation structure according to any one of claims 1 to 3, characterized in that: The material of the protective film is any one of aluminum foil, polyurethane and polystyrene.

5. The thermal insulation structure according to claim 1, characterized in that: There are multiple thermal insulation layers, and the multiple thermal insulation layers are respectively used to be arranged on different surfaces of the battery pack.

6. The thermal insulation structure according to claim 1, characterized in that: The thermal insulation layer is thermal insulation cotton, and the thermal insulation cotton includes a heat insulation part and a water insulation part, and the water insulation part is coated on the outer surface of the heat insulation part.

7. The thermal insulation structure according to claim 1, characterized in that: The heat-insulating layer is a heat-insulating board, and the interior of the heat-insulating board has a cavity isolated from the outside.

8. The thermal insulation structure according to claim 7, characterized in that: There are a plurality of cavities, and the plurality of cavities are distributed in an array in a first direction, and / or the plurality of cavities are distributed in an array in a second direction, and the first direction is perpendicular to the second direction.

9. The thermal insulation structure according to claim 7, characterized in that: The insulation board comprises: Base plate; A top plate, arranged opposite to the bottom plate in a third direction, wherein the third direction is perpendicular to both the first direction and the second direction; A plurality of side panels are connected around the bottom panel and the top panel, and the bottom panel, the top panel and the plurality of side panels are enclosed to form a closed space; A connecting plate is arranged in the enclosed space, the connecting plate is connected to the bottom plate and the top plate, and the connecting plate divides the enclosed space into a plurality of cavities.

10. The thermal insulation structure according to claim 9, characterized in that: The plurality of side panels include a first side panel and a second side panel, the first side panel extends along the first direction, and the second side panel extends along the second direction; There are multiple connecting plates, and the multiple connecting plates extend along the first direction and / or the second direction, and equally divide the enclosed space in the first direction and / or the second direction.

11. The thermal insulation structure according to claim 10, characterized in that: The heat preservation board further includes a reinforcing plate, wherein the reinforcing plate is connected to at least one inner wall surface of the cavity, and the reinforcing plate extends along the first direction or the second direction.

12. The thermal insulation structure according to claim 11, characterized in that: In the orthographic projection in the second direction, the cross-sectional shape of the inner wall profile of the cavity is polygonal, elliptical or circular.

13. The thermal insulation structure according to claim 8, characterized in that: The inner wall surface of each cavity has a first spacing L in the first direction and a second spacing H in the third direction, satisfying: 1 / 2≤L / H≤10 / 1, and H≤8mm, L and H are measured in the same unit, and the third direction is perpendicular to both the first direction and the second direction.

14. The thermal insulation structure according to claim 13, characterized in that: The Grashof number of the insulation board in the third direction is ≤2425.

15. A battery device, characterized in that: It comprises a battery pack and a heat preservation structure as claimed in any one of claims 1 to 14, wherein the heat preservation structure is arranged on the outer surface of the battery pack.

16. The battery device according to claim 15, characterized in that: The heat preservation structure is arranged on two surfaces of the battery pack facing each other in a first direction, and / or, the heat preservation structure is arranged on two surfaces of the battery pack facing each other in a second direction, and / or, the heat preservation structure is arranged on two surfaces of the battery pack facing each other in a third direction; The first direction, the second direction and the third direction are perpendicular to each other.

17. An electrical equipment, characterized in that: It comprises an electrical device and a battery device as described in any one of claims 15 or 16, wherein the battery device supplies power to the electrical device.

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