Composite heat insulation mica plate structure

Abstract

The utility model discloses a composite heat insulation mica plate structure, which comprises a sandwich layer and support plates respectively positioned on two sides of the sandwich layer, the thickness of each support plate is 0.2-0.5 mm, and the thickness of the heat insulation sandwich layer in an original state is 0.8-1.5 mm. According to experimental inspection, the thickness of the supporting plate is 0.2-0.5 mm, and the thickness of the heat insulation sandwich layer in an original state is 0.8-1.5 mm. The heat insulation sandwich layer has elastic performance and high tensile toughness performance, and when the heat insulation sandwich layer wraps the outer surface of a battery, the heat insulation sandwich layer can provide good damage resistance and stably wraps the outer surface of the battery pack to achieve heat insulation and fire insulation capacity.

Description

Technical Field

[0001] This utility model relates to the field of composite heat-insulating mica panel structure technology, and in particular to a composite heat-insulating mica panel structure and its preparation method. Background Technology

[0002] With the development of passive safety technology requirements in the new energy industry, single mica products can no longer meet the diverse requirements of different customers. Against this backdrop, many companies have developed various "composite mica boards" to meet different customers' requirements for thermal insulation and toughness. However, when the target thickness of "composite mica boards" made according to existing solutions is too high, especially exceeding 1.5mm, problems such as large-area delamination, soft surface, and low strength will occur.

[0003] Therefore, a composite thermal insulation mica board structure and its preparation method are still needed to solve the above problems. Utility Model Content

[0004] This invention provides a composite heat-insulating mica plate structure and its preparation method to solve the above problems.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A composite thermal insulation mica panel structure includes: a sandwich layer and support plates located on both sides of the sandwich layer, wherein the thickness of the support plates is 0.2-0.5 mm, and the original thickness of the thermal insulation sandwich layer is 0.8-1.5 mm.

[0007] In one embodiment, the compressed thickness of the sandwich layer is 0.4-1 mm, and the sandwich layer is a heat-insulating sandwich layer or a toughened sandwich layer.

[0008] In one embodiment, the ratio of the original thickness of the sandwich layer to the compressed thickness is (1.2-2):1.

[0009] In one embodiment, it further includes a combination of alternating sandwich layers and support plates distributed on either side of the support plate.

[0010] In one embodiment, the number of support plates is three, and the number of sandwich layers is two.

[0011] In one embodiment, the number of support plates is 5, and the number of sandwich layers is three.

[0012] A method for preparing a composite thermal insulation mica panel structure, used to prepare the composite thermal insulation mica panel structure described in any one of the above-mentioned methods, comprising:

[0013] S1: Provide multiple support plates and sandwich layers, grind both sides of the support plate located in the middle, and grind one side of the other two support plates that serve as the outer wall;

[0014] S2: Apply glue to the sanded surface of the support plate that serves as the outer wall;

[0015] S3: Attach a sandwich layer to the support plate with adhesive;

[0016] S4: Attach the additional support plate to the top of the sandwich layer with glue;

[0017] S5: Hot-pressed stacked sandwich layer and support plate;

[0018] S6: Demold and remove the finished product.

[0019] Preferably, the polishing includes:

[0020] Use 200-grit sandpaper to sand one side of the support plate, removing 0.02-0.03 mm of imperfections.

[0021] Preferably, when the number of support plates in the composite thermal insulation mica panel structure is 3 layers, S3 is repeated 3 times.

[0022] Preferably, when the number of support plates in the composite thermal insulation mica panel structure is 4 layers, S3 is repeated 4 times.

[0023] Compared with the prior art, the beneficial effects of this utility model include at least the following:

[0024] Experimental testing showed that the thickness of the support plate is 0.2-0.5mm, and the original thickness of the heat insulation sandwich layer is 0.8-1.5mm. The heat insulation sandwich layer has elastic properties and strong tensile toughness. When it is wrapped around the battery, it can provide good resistance to damage, stably wrap around the battery pack, and play a role in heat insulation and fireproofing. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this utility model;

[0026] Figure 2 This is a schematic diagram of the structure of Embodiment 2 of this utility model.

[0027] In the diagram: 1. Support plate; 2. Sandwich layer. Detailed Implementation

[0028] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to make the present invention more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore repeated descriptions of them will be omitted.

[0029] The terms used to describe position and direction in this utility model are illustrated with the accompanying drawings, but changes can be made as needed, and all such changes are included within the scope of protection of this utility model.

[0030] Reference Figure 1 As shown in Figure 2, this utility model provides a composite heat-insulating mica panel structure, including: a sandwich layer 2 and support plates 1 located on both sides of the sandwich layer. The thickness of the support plates 1 is 0.2-0.5 mm, and the original thickness of the heat-insulating sandwich layer 2 is 0.8-1.5 mm. Within this thickness range, the heat-insulating sandwich layer 2 and the support plates 1 possess elastic properties and strong tensile toughness. When covered on the battery exterior, they provide good resistance to damage, stably covering the battery pack exterior, providing heat and fire insulation, preventing flames from escaping from inside the battery, and blocking conditions for flame generation.

[0031] In one embodiment, the compressed thickness of the sandwich layer 2 is 0.4-1 mm, and the sandwich layer 2 is either a thermal insulation sandwich layer 2 or a toughened sandwich layer 2. Alternatively, materials with excellent thermal insulation properties, such as ceramic-based nano-aerogel felt or glass fiber-based nano-aerogel felt, can be selected. These materials primarily serve to reduce product density and increase thermal insulation capabilities. Furthermore, during use, a thicker original felt should be pressed into a thinner sandwich layer 2 to meet the practical requirements of lightweight design.

[0032] In one embodiment, the original thickness to compressed thickness ratio of the sandwich layer 2 is (1.2-2):1. Experimental results show that the sandwich layer 2 within this range can avoid delamination when combined with other layered structures, effectively maintaining the integrity of the structure.

[0033] In one embodiment, the method further includes a combination of alternating distributions of the sandwich layer 2 and the support plate 1 on either side of the support plate 1. The support plate 1 and the sandwich layer 2 can be flexibly and repeatedly stacked to meet practical application requirements.

[0034] In one embodiment, the number of support plates 1 is 3, and the number of sandwich layers 2 is two.

[0035] In one embodiment, the number of support plates 1 is 5, and the number of sandwich layers 2 is three.

[0036] In another aspect, this utility model discloses a method for preparing a composite thermal insulation mica panel structure, used to prepare the composite thermal insulation mica panel structure as described in any one of the above claims, comprising:

[0037] S1: Provide multiple support plates 1 and sandwich layers 2. The two sides of the middle support plate 1 are polished, and one side of the other two support plates 1, which serve as the outer walls, is polished. The support plates 1 can be made of mica paper. The mica paper roll is coated with the aforementioned silicone resin using a coating machine and then dried in a tunnel oven to form a mica paper prepreg with a thickness between 0.07-0.08 mm and a resin content of 10%-25%. By stacking 3 to 4 layers of the mica paper prepreg and then heating and pressing it in a hot press to form a 0.2-0.5 mm thin sheet.

[0038] S2: Apply adhesive to the sanded surface of the support plate 1, which serves as the outer wall. Sanding involves sanding one side of the support plate 1 with 200-grit sandpaper, removing 0.02-0.03 mm of material. After sanding, apply adhesive to the surfaces of the support plate 1 that need to be bonded together.

[0039] S3: Attach a sandwich layer 2 to the support plate 1 using adhesive. The sandwich layer 2, consisting of ceramic-based nano-aerogel felt, ceramic fiber paper, or glass fiber-based nano-aerogel felt, is then glued to the support plate 1.

[0040] S4: Attach the other support plate 1 to the top of the sandwich layer 2 using adhesive. Then, attach another support plate 1 to the sandwich layer 2 from the previous step using adhesive.

[0041] S5: The sandwich layer 2 and the support plate 1 are hot-pressed and stacked. Finally, by applying external force to the side of the support plate 1, the stacked composite thermal insulation mica board structure is heated and compressed, so that the sandwich layer 2 and the support plate 1 can be stably fixed, which can effectively prevent subsequent separation.

[0042] S6: Demold and remove the finished product.

[0043] The polishing includes:

[0044] Use 200-grit sandpaper to sand one side of the support plate 1, removing 0.02-0.03 mm of imperfections.

[0045] Preferably, when the number of support plates 1 of the composite thermal insulation mica panel structure is 3 layers, S3 is repeated 3 times.

[0046] When using a 3-layer support plate for product 1, the layup sequence is as follows:

[0047] 1) Take the mica board with the adhesive side facing up as the first layer;

[0048] 2) Use the heat-insulating sandwich layer as the second layer;

[0049] 3) Take double-sided coated mica boards and lay them out as the third layer;

[0050] 4) Use the heat-insulating sandwich layer as the fourth layer;

[0051] 5) Take the mica board with the adhesive side facing down as the fifth layer.

[0052] Preferably, when the number of support plates 1 of the composite thermal insulation mica panel structure is 4 layers, S3 is repeated 4 times.

[0053] When using product two with 5-layer support plate 1, the layup sequence is as follows:

[0054] 1) Take the mica board with the adhesive side facing up as the first layer;

[0055] 2) Use the heat-insulating sandwich layer as the second layer;

[0056] 3) Take double-sided coated mica boards and lay them out as the third layer;

[0057] 4) Use the heat-insulating sandwich layer as the fourth layer;

[0058] 5) Take the mica board with the adhesive side facing down as the fifth layer;

[0059] 6) Take the mica board with the adhesive side facing down as the sixth layer;

[0060] 7) Take the mica board with the adhesive side facing down as the seventh layer.

[0061] test:

[0062] 1. Knead Product 1 and Product 2 repeatedly with a force of 100N 100 times each. Both Product 1 and Product 2 will separate into layers.

[0063] 2. Rub Product 1 and Product 2 repeatedly with a force of 100N for 500 times. Product 1 did not separate into layers, while Product 2 separated into layers slightly.

[0064] 3. Knead Product 1 and Product 2 repeatedly with a force of 100N 1000 times. Product 1 will slightly separate into layers, and Product 2 will separate into layers.

[0065] Experimental testing has shown that the composite thermal insulation mica panel structure disclosed in this utility model has a high resistance to delamination.

[0066] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention, and all such changes should fall within the protection scope of the claims of the present invention.

Claims

1. A composite thermal insulation mica panel structure, characterized in that, include: The sandwich layer and support plates located on both sides of the sandwich layer, wherein the thickness of the support plates is 0.2-0.5mm, and the original thickness of the sandwich layer is 0.8-1.5mm; The compressed thickness of the sandwich layer is 0.4-1mm, and the sandwich layer is a heat-insulating sandwich layer or a toughened sandwich layer; The original thickness of the sandwich layer and the thickness after compression are in the ratio of (1.2-2):

1.

2. The composite thermal insulation mica panel structure according to claim 1, characterized in that, It also includes combinations in which the sandwich layer and the support plate are distributed alternately on either side of the support plate.

3. The composite thermal insulation mica panel structure according to claim 1, characterized in that, The number of support plates is 3, and the number of sandwich layers is 2.

4. The composite thermal insulation mica panel structure according to claim 1, characterized in that, The number of support plates is 5, and the number of sandwich layers is three.

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