Composite aerogel heat insulation pad

Abstract

The utility model discloses a composite aerogel heat insulation pad, which comprises a foam aerogel structure layer and a packaging layer wrapping the foam aerogel structure layer, the foam aerogel structure layer comprises at least one foam aerogel layer, the foam aerogel layer comprises an aerogel layer and a foam block, the foam block is arranged on the aerogel layer, and the foam block is arranged on the aerogel layer. Filling positions of the aerogel layer are filled with the foam blocks, the filling positions are arranged in the thickness direction, and the depth of each filling position is at least half of the thickness of the aerogel layer. The foam blocks are filled into the aerogel layer, so that the rebound resilience of the heat insulation pad is improved, and the heat insulation pad can bear pressure changes of more times of compression cycles on the premise of keeping the heat insulation performance. The heat-insulation application field of the fire-resistant rubber is increased, and the fire-resistant rubber can be used in the high-temperature field after being combined with aerogel. The problem of poor rebound resilience of the aerogel felt is effectively improved, and the aerogel felt is more effectively applied between battery cells. Therefore, the aerogel heat insulation pad has more application fields, and the service life of the heat insulation pad in the charging and discharging tolerant process between battery cells is prolonged.

Description

Technical Field

[0001] The utility model belongs to the field of heat insulation for electric vehicle batteries, and particularly relates to a composite aerogel heat insulation pad. Background Technique

[0002] With the proposal of the concept of green environmental protection, electric vehicles are increasingly favored by people. The key technologies of new energy vehicles lie in the three major systems of the battery system, the motor system, and the electronic control system. As the power source of the vehicle, once safety problems such as thermal runaway occur in the battery system, it often causes immeasurable losses. To solve the problem of thermal runaway of the battery system, currently, heat insulation pads are widely arranged between battery cells / modules. On the one hand, it plays a role in heat insulation, and on the other hand, it prevents adjacent battery modules from squeezing and rubbing against each other, thereby avoiding the occurrence of thermal runaway to a certain extent.

[0003] Aerogel felt has good heat insulation performance and is currently a material that is maturely applied to block heat transfer between battery cells. However, the existing aerogel felt materials do not have good material elasticity under compression cycles. As the battery cells expand and contract during the charging and discharging process, they will gradually lose elasticity, making it difficult to keep in contact with the battery cells when the battery cells contract, and it is easy to fall off or be misaligned from the surface of the battery cells, affecting the heat insulation effect. Content of the Utility Model

[0004] In view of the deficiencies described in the above-mentioned prior art, the utility model provides a composite aerogel heat insulation pad, which combines refractory rubber (CR foam) with aerogel felt, and prepares a composite aerogel heat insulation pad after being wrapped with a film material. This composite aerogel heat insulation pad can maintain good resilience performance during the expansion - contraction cycle of the battery cells, ensuring that the heat insulation pad can always keep in contact with the battery cells, so as to solve the problem that the elasticity of the existing aerogel felt material gradually decays under compression cycles.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A composite aerogel heat insulation pad includes a foam aerogel structure layer and a packaging layer that wraps the foam aerogel structure layer. The foam aerogel structure layer includes at least one foam aerogel layer. The foam aerogel layer includes an aerogel layer and foam blocks. The foam blocks are filled in the filling positions of the aerogel layer. The filling positions are arranged along the thickness direction, and the depth of each filling position is at least half of the thickness of the aerogel layer. The foam blocks are refractory rubber (CR foam), which has good fire resistance, chemical corrosion resistance, and also has good resilience performance. It can maintain good elasticity under compression cycles. Filling the foam blocks into the aerogel layer increases the resilience performance of the heat insulation pad, enabling it to withstand more pressure changes during compression cycles while maintaining heat insulation performance.

[0007] As a preferred embodiment of the present utility model, a first aerogel layer is stacked on at least one working end face of the foam aerogel layer. Stacking the first aerogel layer on the foam aerogel layer further improves the fire and heat insulation performance of the heat insulation pad.

[0008] As a preferred embodiment of the present utility model, the filling position is a through hole, and the through hole penetrates the aerogel layer in the thickness direction. After filling, the two end faces of the foam block do not exceed the working end faces of the aerogel layer.

[0009] As a preferred embodiment of the present utility model, the filling position is a filling groove. The foam block is filled from the opening direction of the filling groove, and the end face of the foam block does not exceed the working end face of the aerogel layer after filling.

[0010] As a preferred embodiment of the present utility model, the aerogel layer is an aerogel felt.

[0011] As a preferred embodiment of the present utility model, the foam block is a CR foam block.

[0012] As a preferred embodiment of the present utility model, the aerogel layer is provided with a plurality of filling positions.

[0013] As a preferred embodiment of the present utility model, the filling positions are independently through holes or filling grooves.

[0014] Beneficial effects:

[0015] (1) By filling the foam block, the resilience performance of the aerogel heat insulation pad is increased, enabling it to withstand pressure changes during more compression cycles while maintaining the heat insulation performance.

[0016] (2) The heat insulation application field of the refractory rubber is expanded, and it can be used in high-temperature fields after being combined with aerogel.

[0017] (3) The problem of poor resilience performance of the aerogel felt itself is effectively improved, and it can be more effectively applied between battery cells.

[0018] (4) The aerogel heat insulation pad has more applicable fields, and the service life of the heat insulation pad during the charge and discharge process between battery cells is enhanced. Description of the drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1A top view of the foam aerogel layer.

[0021] Figure 2 The schematic diagram of the structure of the foam aerogel layer shows only one row of foam blocks.

[0022] Figure 3 This is a schematic diagram of the structure of Example 1. DETAILED DESCRIPTION

[0023] 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 in 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.

[0024] Embodiment 1:

[0025] A composite aerogel thermal insulation pad includes a foam aerogel structure layer, a first aerogel layer 3 and an encapsulation layer 4. The foam aerogel structure layer includes at least one foam aerogel layer. This embodiment takes one layer as an example for explanation. The foam aerogel layer includes an aerogel layer 1 and a foam block 2. The foam block is a CR foam block. Figure 1 and 2 As shown, a plurality of filling positions are arranged in the thickness direction of the aerogel layer 1 , each filling position is independent of each other, and the shapes may be the same or different, and the shape of the foam block is the same as the shape of the corresponding filling position.

[0026] Moreover, the filling position can be a through hole or a non-through filling groove. This embodiment takes a through hole as an example for demonstration. The foam block 2 is filled in the filling position of the aerogel layer 1. After filling, the end surface of the foam block does not exceed the working end surface of the aerogel layer. And when a filling groove is used, the depth of the filling groove is required to be greater than or equal to half the thickness of the aerogel layer. Only in this way can the composite pad have sufficient resilience.

[0027] The first aerogel layer 3 is stacked on the working end surface of the foam aerogel layer. The first aerogel layer 3 can be arranged on one side or both sides of the foam aerogel layer. This embodiment takes the first aerogel layer 3 stacked on both working end surfaces as an example for demonstration. After the stacking is completed, the whole is packaged with the packaging layer 4. After being cut open, the layered structure presented in this embodiment from top to bottom is as follows: Figure 3 As shown, the packaging layer 4, the first aerogel layer 3, the foam aerogel layer, the first aerogel layer 3 and the packaging layer 4 are stacked in sequence.

[0028] The foam block is made of fire-resistant rubber (CR foam), which has good fire resistance and chemical corrosion resistance. The material has good resilience and can maintain good material elasticity under compression cycles. Filling the foam block into the aerogel layer increases the resilience of the thermal insulation pad, enabling it to withstand multiple pressure changes under compression cycles while maintaining its thermal insulation performance.

[0029] In this embodiment, both the aerogel layer 1 and the first aerogel layer 3 can use aerogel felts.

[0030] For the foam aerogel structural layer using two or more foam aerogel layers, the foam aerogel layers are stacked together. Each foam aerogel layer is provided with a filling position and filled with a foam block, and the first aerogel layer 3 can be provided only on the outermost foam aerogel layer.

[0031] Embodiment 2:

[0032] A composite aerogel thermal insulation pad, which is different from Embodiment 1 in that there are only a foam aerogel layer and a packaging layer 4. The packaging layer 4 encapsulates the foam aerogel layer, and the rest are the same as in Embodiment 1.

[0033] Embodiment 3:

[0034] A composite aerogel thermal insulation pad, which is different from Embodiment 1 in that the first aerogel layer 3 is stacked only on one working end face of the foam aerogel layer, and then the whole is encapsulated by the packaging layer 4.

[0035] In addition to the above embodiments, the foam aerogel layer can also replace the aerogel layer 1 and the foam block 2 with each other, fill the aerogel layer into the filling position of the foam block, and use the foam block 2 as Figure 1 the black area in Figure 1 and the aerogel layer 1 as

[0036] In the description of this specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0037] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, making equivalent substitutions or changes, shall be covered by the protection scope of the present utility model.

Claims

1. A composite aerogel heat insulation pad, characterized in that: It includes a foam aerogel structure layer and an encapsulation layer that wraps the foam aerogel structure layer. The foam aerogel structure layer includes at least one foam aerogel layer. The foam aerogel layer includes an aerogel layer (1) and a foam block (2). The foam block (2) is filled in the filling positions of the aerogel layer (1). The filling positions are arranged along the thickness direction of the aerogel layer (1), and the depth of each filling position is at least half of the thickness of the aerogel layer (1).

2. The composite aerogel heat insulation pad according to claim 1, wherein: A first aerogel layer (3) is stacked on at least one working end face of the foam aerogel layer.

3. The composite aerogel thermal insulation pad according to claim 1 or 2, characterized in that: The filling positions are through holes that penetrate the aerogel layer (1) along the thickness direction.

4. The composite aerogel thermal insulation pad according to claim 1 or 2, characterized in that: The filling positions are filling grooves.

5. The composite aerogel heat insulation pad according to claim 1, wherein: The aerogel layer (1) is an aerogel felt.

6. The composite aerogel heat insulation pad according to claim 1, characterized in that: The foam block is a CR foam block.

7. The composite aerogel heat insulation pad according to claim 1, characterized in that: The aerogel layer (1) is provided with a plurality of filling positions.

8. The composite aerogel heat insulation pad according to claim 7, wherein: The filling positions are independently through holes or filling grooves respectively.

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