Heat insulation pad with novel structure

Abstract

The utility model discloses a heat insulation pad with a novel structure, which comprises a heat insulation core material, a buffer frame, an upper packaging film and a lower packaging film, the heat insulation core material is arranged at a core material placing position of the buffer frame, and the heat insulation core material and the buffer frame are packaged together by the upper packaging film and the lower packaging film; the buffer frame is a low-flame-retardant rubber frame or a non-flame-retardant rubber frame, and fireproof layers are arranged on the outer side of the upper packaging film and the outer side of the lower packaging film. A flame-retardant rubber frame of an original heat insulation pad is replaced by a low-flame-retardant or non-flame-retardant rubber frame, a fireproof layer is additionally arranged on the heat insulation pad packaging film, the flame-retardant rubber frame and the fireproof layer are combined to jointly achieve the elastic and fireproof functions, the stretching resilience performance and other physical performance of the whole heat insulation pad are provided, and meanwhile the requirement for flame retardance of the heat insulation pad is met. According to the utility model, the physical characteristics such as tensile resilience and the like are enhanced and the production cost is reduced by reducing the addition amount of the flame retardant in the silicone rubber formula, and meanwhile, the flame-retardant effect of non-flame-retardant or low-flame-retardant silicone rubber is supplemented by adding the fireproof sheet, so that the cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the field of power battery safety, and particularly relates to a heat insulation pad with a novel structure. Background Technique

[0002] New energy heat insulation pads are mainly used for thermal protection between power lithium battery cells, can prevent thermal runaway of the cells, and greatly improve the driving safety of new energy vehicles.

[0003] The existing conventional silicone rubber frame heat insulation pad structure is mainly double-sided adhesive - PET film - silicone rubber frame - aerogel core material - PET film - double-sided adhesive. In order to ensure the flame retardant effect of the heat insulation pad, the silicone rubber is required to have excellent flame retardant performance. When a flame retardant is added to the silicone rubber to improve its flame retardant performance, the tensile resilience performance and other physical properties of the silicone rubber will be significantly reduced. The higher the flame retardant grade, the worse its elastic function, which may affect the sealing performance and durability of the heat insulation pad. Content of the Utility Model

[0004] Aiming at the problem of poor elasticity of the silicone rubber of the existing heat insulation pad, the utility model provides a heat insulation pad with a novel structure, which uses a low-flame-retardant or non-flame-retardant rubber frame and is provided with a fireproof layer on the rubber frame to cooperate to achieve the purpose of elasticity and fireproofing and flame retardance.

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

[0006] A heat insulation pad with a novel structure, including a heat insulation core material, a buffer frame, an upper encapsulation film and a lower encapsulation film. The heat insulation core material is arranged at the core material placement position of the buffer frame, and the upper encapsulation film and the lower encapsulation film encapsulate the heat insulation core material and the buffer frame together; the buffer frame is a low-flame-retardant rubber frame or a non-flame-retardant rubber frame, and fireproof layers are arranged on the outer sides of the upper encapsulation film and the lower encapsulation film. The flame retardant of the normal silicone rubber frame is halogen-free, such as aluminum hydroxide, and the addition amount is 20 - 40%. While the addition amount of the low-flame-retardant silicone rubber frame can be less than 10%; when the addition of the flame retardant in the silicone rubber is reduced or even not added, the elasticity of the silicone rubber is ensured, and the fireproof function is transferred to the fireproof layer. When the cell has a thermal runaway, the fireproof layer can self-extinguish, so that the whole heat insulation pad can effectively inhibit the spread of fire, isolate air and heat conduction.

[0007] As a preferred scheme of the utility model, adhesive layers, such as double-sided adhesive, are arranged on both working end faces of the fireproof layer. The double-sided adhesive on the outer end face is for pasting between the cells, and the inner double-sided adhesive is for pasting to the corresponding encapsulation film.

[0008] As a preferred embodiment of the present utility model, the fireproof layer is a fireproof sheet. It is made of epoxy intumescent fireproof material, which will expand rapidly when thermal runaway occurs to form a dense carbon layer and a porous structure, thereby isolating air and heat conduction, reducing heat transfer, protecting the main body of the base material, and achieving the purpose of fire prevention and flame retardancy.

[0009] As a preferred embodiment of the present utility model, the thickness of the fireproof layer is 0.3 - 2 mm.

[0010] As a preferred embodiment of the present utility model, the heat insulation core material is an aerogel core material, including but not limited to ceramic aerogel felt, pre-oxidized fiber aerogel felt, and fiberglass aerogel felt.

[0011] As a preferred embodiment of the present utility model, the upper encapsulation film and / or the lower encapsulation film is a PET film, a PI film, or a PU film. The upper and lower encapsulation films can be of the same film material or different film materials, as long as they can be encapsulated. Of course, other encapsulation materials can also be used, and the film material is not limited.

[0012] The present utility model replaces the flame-retardant rubber frame of the original heat insulation pad with a low-flame-retardant or non-flame-retardant rubber frame, and adds a fireproof layer to the encapsulation film of the heat insulation pad. The combination of the two enables the heat insulation pad to have both high elasticity and excellent fireproof performance, making the tensile resilience performance and other physical properties of the heat insulation pad significantly superior to those of the existing silicone rubber frame heat insulation pad, while also meeting the requirements for the flame retardancy of the heat insulation pad. In addition, the flame retardant used in silicone rubber is relatively expensive, and its use cost is higher than that of the fireproof sheet used in the present utility model. Since the use of the flame retardant in the silicone rubber frame is reduced, the production cost of the silicone rubber frame heat insulation pad is significantly reduced. Description of the Drawings

[0013] 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 drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0014] Figure 1 It is a structural schematic diagram of the present utility model. Detailed Embodiments

[0015] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the protection scope of the present utility model.

[0016] Embodiment:

[0017] A heat insulation pad with a new structure, as Figure 1 shown, includes a heat insulation core material 1, a buffer frame 2, a fireproof layer 3, an upper encapsulation film 4 and a lower encapsulation film 5. The heat insulation core material is an aerogel core material, and the upper encapsulation film 4 and the lower encapsulation film 5 are PET films. The upper and lower encapsulation films can be the same film material or different film materials, as long as they can be encapsulated. Of course, other encapsulation materials can also be used, not limited to film materials, and PI films or PU films can also be used.

[0018] The heat insulation core material 1 is arranged at the core material placement position of the buffer frame 2, and the upper encapsulation film 4 and the lower encapsulation film 5 encapsulate the heat insulation core material 1 and the buffer frame 2 together.

[0019] Then, a fireproof layer 3 is pasted on the outer sides of the upper encapsulation film 4 and the lower encapsulation film 5 through an adhesive layer 6. The adhesive layer used can be double-sided tape. Similarly, there is double-sided tape on the outer end face of the fireproof layer 3. During production, the fireproof layer is directly set to have a double-sided tape structure, which is convenient for directly pasting with the encapsulated heat insulation pad. After pasting, it becomes a new type of heat insulation pad.

[0020] The buffer frame used in this embodiment is a low-flame-retardant rubber frame or a non-flame-retardant rubber frame. The flame retardant of a normal silicone rubber frame is halogen-free, such as aluminum hydroxide, and the addition amount is 20-40%. While the addition amount of the flame retardant of the low-flame-retardant silicone rubber frame can be less than 10%, or even not added, which ensures the elasticity of the silicone rubber, and the fireproof function is transferred to the fireproof layer.

[0021] The fireproof layer used is a fireproof sheet with a thickness of 0.3-2 mm. The fireproof layer is made of epoxy intumescent fireproof materials. When the battery core has a thermal runaway, the fireproof layer can self-extinguish, enabling the overall heat insulation pad to effectively inhibit the spread of fire, isolate air and heat conduction.

[0022] 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 utility model. 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.

[0023] 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, makes equivalent substitutions or changes, and should be covered within the protection scope of the present utility model.

Claims

1. A thermal insulation pad of a novel structure, comprising a thermal insulation core material (1), a buffer frame (2), an upper packaging film (4) and a lower packaging film (5), wherein the thermal insulation core material (1) is arranged at a core material placement position of the buffer frame (2), and the upper packaging film (4) and the lower packaging film (5) package the thermal insulation core material (1) and the buffer frame (2) together; the characteristics are as follows: The buffer frame is a low flame retardant rubber frame or a non-flame retardant rubber frame, and a fireproof layer (3) is provided on the outer side of the upper packaging film (4) and the outer side of the lower packaging film (5).

2. The thermal insulation pad of the novel structure according to claim 1 is characterized in that: Both working end surfaces of the fireproof layer are provided with an adhesive layer (6).

3. The thermal insulation pad of the novel structure according to claim 1 or 2 is characterized in that: The fireproof layer is a fireproof sheet.

4. The thermal insulation pad of the novel structure according to claim 3 is characterized in that: The thickness of the fireproof layer is 0.3-2 mm.

5. The thermal insulation pad of the novel structure according to claim 4 is characterized in that: The heat-insulating core material is an aerogel core material.

6. The thermal insulation pad of the novel structure according to claim 4 is characterized in that: The upper packaging film (4) and / or the lower packaging film (5) are PET films, PI films or PU films.

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