Roll-shaped film bearing heat insulation pad

Abstract

The utility model discloses a roll-shaped film bearing heat insulation pad which comprises a release film winding structure and a heat insulation structure, the release film winding structure comprises a supporting base body and a bearing release film, the supporting base body is provided with a supporting plane, the bearing release film is wound on the supporting base body, and the heat insulation structure is arranged on the supporting plane. A winding plane part is formed in the position, corresponding to the supporting plane, of the bearing release film, and a heat insulation structure is pasted to the winding plane part. The continuous bearing release film is wound to serve as an adhesion base body of the heat insulation pad, the supporting base body serves as a bearing release film winding base body, in order to enable the heat insulation pad to be flatly pasted on the bearing release film without bending, the supporting base body is specially provided with the supporting plane, and the bearing release film forms the winding plane portion after being wound. The heat insulation pad is adhered to the winding plane portion, the problems of bending and deformation of the heat insulation pad are solved, the heat insulation pad is located on the same side of the bearing release film after the heat insulation pad is opened, and the needed heat insulation pad can be completely taken down from the bearing release film.

Description

Technical Field

[0001] The utility model belongs to the technical field of thermal runaway protection of power batteries, and particularly relates to a roll-shaped film bearing thermal insulation pad. Background Art

[0002] New energy electric vehicles help reduce the consumption of fossil energy, reduce the large amount of oil imported from abroad to ensure energy security, and reduce environmental pollution from traditional vehicles. Therefore, new energy electric vehicles are of great significance to the industrial development of our country.

[0003] The key technologies for new energy electric vehicles lie in power batteries, motors, and electronic controls. Of these three, power battery technology is the most important source of power and, therefore, a core technology. Within this core technology, power battery safety has long been a key issue plaguing the development of new energy vehicles, particularly thermal runaway, which has frequently caused electric vehicle burns.

[0004] In order to solve the problem of thermal runaway and heat diffusion of power batteries, domestic power battery companies currently usually adopt a combination of active protection technology and passive protection technology.

[0005] Active protection mainly includes fire extinguishing agents, BMS, coolants, etc. Once thermal runaway occurs, the fire extinguishing agent directly extinguishes the fire, and the coolant starts cooling to cool down the thermal runaway battery to prevent further heat spread and cause the entire vehicle to burn.

[0006] Passive protection primarily includes mechanical property enhancement, insulation protection, and thermal insulation material protection. Thermal insulation material protection is one of the primary solutions for thermal protection between battery cells. The market for thermal insulation mats is already mature, but currently the predominant thermal insulation mats on the market are single-sheet adhesive-backed thermal insulation mats. Continuous release paper-backed adhesive thermal insulation mats are rare because most thermal insulation mats lack bendability, making winding continuous release paper thermal insulation mats difficult. Utility Model Content

[0007] The utility model provides a roll film-supported thermal insulation pad, which provides a windable structure for a thermal insulation pad that cannot be bent or curved. The continuous support release film winding structure provides a plane to ensure that the thermal insulation pad can be pasted flatly, solving the problem of bending and deformation of the thermal insulation pad caused by the roll film-supported thermal insulation pad.

[0008] The technical solution adopted by this utility model is:

[0009] A rolled film-bearing thermal insulation pad includes a release film winding structure and an insulation structure. The release film winding structure includes a supporting base and a supporting release film. The supporting base is provided with a supporting plane. The supporting release film is wound on the supporting base, and the position corresponding to the supporting plane constitutes a winding plane portion, and the insulation structure is pasted on the winding plane portion. The carrier release film is a continuous release film, and the support substrate provides winding support for the carrier release film. That is, after the carrier release film is wound, it has the same shape as the support substrate. The shape of the support substrate is not limited. It only needs to provide a support plane for the carrier release film during winding, so that it forms a winding plane portion after winding. The winding plane portion provides a flat attachment position for the thermal insulation structure. The portion outside the winding plane portion is non-planar and no thermal insulation structure is attached. Moreover, the winding direction of the carrier release film is from the inside to the outside, and can be wound clockwise or counterclockwise. Regardless of the winding direction, when the release film winding structure is opened, the attached thermal insulation structure is always on the front side of the carrier release film, and the front side of the carrier release film is the side away from the support substrate. Moreover, the support substrate can be a solid structure or a hollow structure, as long as it can provide a support plane for the carrier release film to be wound. Of course, if it is set to be hollow, such as a support tube, other structures, such as thermal insulation core material, can be placed in the hollow position.

[0010] As a preferred embodiment of the present invention, the support base is provided with at least two supporting planes, each supporting plane corresponds to a winding plane portion, that is, there are also at least two winding plane portions, and each winding plane portion is provided with a heat insulation structure. The heat insulation structure of each winding plane portion can be the same or different, and each winding plane portion is also independent, and can be a single-layer structure or a laminated structure, that is, when there are more than two winding plane portions, the number of layers of each winding plane portion can be the same or different, and the specific winding is carried out according to actual needs. That is to say, the winding plane portions possessed by the support release film after winding can be all single-layer winding plane portions, all laminated winding plane portions, or both single-layer winding plane portions and laminated winding plane portions.

[0011] As a preferred embodiment of the present invention, at least one winding plane portion is a laminated structure having at least two laminated layers, and a heat-insulating structure is adhered to the front surface of each winding plane portion. That is, the winding plane portions possessed by the release film after winding can be either laminated winding plane portions or a combination of single-layer winding plane portions and laminated winding plane portions. For a single-layer winding plane portion, the heat-insulating structure is only bonded to the front surface of the winding plane portion. For a laminated winding plane portion, the heat-insulating structure of the outermost winding plane portion is also only bonded to the winding plane portion. The heat-insulating structure of the inner winding plane portion, because it contacts the back surface of the adjacent winding plane portion, may or may not be bonded to the back surface of the adjacent winding plane portion, depending on the actual selection.

[0012] As a preferred embodiment of the present invention, the heat-insulating structure located on the inner winding plane is bonded to the back of the adjacent winding plane; and the bonding force between the heat-insulating structure and the front of the winding plane differs from the bonding force between the heat-insulating structure and the back of the adjacent winding plane by at least 0.1N / 25mm. In other words, the bonding force between the front and back of the same winding plane differs by at least 0.1N / 25mm, and the heat-insulating structures are all attached to the end faces of the same bonding force, so that when the carrier release film is opened, all the heat-insulating structures can always be located on the same side of the carrier release film; as to whether the bonding force on the front or back of the winding plane is greater, it is determined by which side the heat-insulating structure is ultimately presented, and it is usually selected that the bonding force between the heat-insulating structure and the front of the winding plane is greater than the bonding force between the heat-insulating structure and the back of the adjacent winding plane. In addition, the outermost winding plane portion may or may not be bonded with an insulation structure. When the insulation structure is bonded, the insulation structure is bonded on one side to the front side of the winding plane portion, and the other side of the insulation structure may or may not contain a back adhesive layer with a single piece of release paper.

[0013] As a preferred embodiment of the present invention, the thermal insulation structure located on the inner winding flat surface is not bonded to the back surface of the adjacent winding flat surface. In this configuration, the thermal insulation structure is bonded to the front surface of the winding flat surface on one side. The other side of the thermal insulation structure may or may not include an adhesive layer with a single piece of release paper. Furthermore, the thermal insulation structure may or may not be bonded to the outermost winding flat surface.

[0014] As a preferred solution of the present invention, the thermal insulation structure and the wound flat portion are bonded through the adsorption layer of the carrier release film. For this structure, the bonding force of the adsorption layers on the front and back sides of the carrier release film is different, and the difference in bonding force is at least 0.1N / 25mm. In this way, after opening the carrier release film, the thermal insulation structure can be on the same side of the carrier release film.

[0015] As a preferred solution of the present invention, the thermal insulation structure and the winding plane portion are bonded by a double-sided adhesive layer. The double-sided adhesive layer is on the thermal insulation structure. For this structure, the bonding force of the double-sided adhesive layers on both sides of the thermal insulation structure itself is different, and the bonding force difference is at least 0.1N / 25mm.

[0016] Regardless of whether the bonding is performed by the adsorption layer or the double-sided adhesive layer, the thermal insulation structure is located on the same side of the carrier release film and can be completely removed from the carrier release film.

[0017] As a preferred solution of the present invention, the thermal insulation structure located on the outermost winding plane portion is a single-sided adhesive thermal insulation structure, the adhesive surface of the thermal insulation structure is adhered to the winding plane portion, and the non-adhesive surface of the thermal insulation structure is directly exposed.

[0018] As a preferred embodiment of the present invention, the thermal insulation structure located on the outermost winding plane is a double-sided adhesive-backed thermal insulation structure, and a removable release paper is provided on the end surface of the thermal insulation structure away from the winding plane. The release paper used can be a continuous release paper that wraps the entire outermost thermal insulation structure, or it can be a separate release paper, with each thermal insulation structure protected by a separate release paper. The exposed double-sided adhesive layer of the thermal insulation structure is particularly important for protection.

[0019] As a preferred embodiment of the present invention, the thermal insulation structure includes at least one thermal insulation pad row, each thermal insulation pad row includes at least one thermal insulation pad layer, and each thermal insulation pad layer includes at least one thermal insulation pad. The thermal insulation structures at various locations can be identical or different, and can be arranged in the same or different directions, as long as the thermal insulation structure is provided.

[0020] As a preferred embodiment of the present invention, the thermal insulation pad is an aerogel thermal insulation pad, a foam material thermal insulation pad, a mica board thermal insulation pad, a nano-composite board thermal insulation pad, a phase change material thermal insulation pad or a composite thermal insulation pad. The same thermal insulation pad can be used for the same thermal insulation structure, or different thermal insulation pads can be used.

[0021] The utility model uses a continuous carrier release film roll as the adhesive base of the thermal insulation pad, and the support base serves as the carrier release film roll base. In order to allow the thermal insulation pad to be flatly attached to the carrier release film without bending, the support base is specially provided with a support plane. After the carrier release film is rolled up, a winding plane portion is formed, and the thermal insulation pad is bonded to the winding plane portion, which solves the problem of bending and deformation of the thermal insulation pad. In addition, after the utility model is opened, the thermal insulation pads are all on the same side of the carrier release film, and the required thermal insulation pad can be completely removed from the carrier release film. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 This is a structural diagram of Example 1.

[0024] Figure 2 This is a schematic structural diagram of Example 2.

[0025] Figure 3 This is a structural diagram of Example 3.

[0026] Figure 4 This is a schematic structural diagram of Example 4.

[0027] Figure 5 This is a structural diagram of Example 5. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Example 1:

[0030] A roll-type film-bearing thermal insulation pad, such as Figure 1 As shown, it includes a release film winding structure 1 and a thermal insulation structure 2. The release film winding structure 1 includes a supporting base 100 and a carrier release film 101. The supporting base 100 is provided with a supporting plane. In this embodiment, the supporting base 100 has four supporting planes and presents a rectangular structure. The carrier release film 101 is wound on the supporting base 100, and the outward end face of the carrier release film 101 is the front face. In this embodiment, the carrier release film 101 is wound into a single-layer rectangular structure with four winding plane portions 3. Each winding plane portion 3 is a single-layer structure. The supporting base 100 can be solid or hollow. In this embodiment, the hollow one is used. The middle hole of the supporting base 100 is filled with a thermal insulation core material 4. The position of the carrier release film 101 corresponding to the supporting plane constitutes a winding plane portion 3, and the front face of each winding plane portion 3 is pasted with a thermal insulation structure 2. The thermal insulation structure 2 used is three rows of thermal insulation pads, each row is a layer of thermal insulation pads, each layer is a thermal insulation pad, and the thermal insulation pads used are selected from aerogel thermal insulation pads, foam material thermal insulation pads, mica board thermal insulation pads, nano-composite board thermal insulation pads, phase change material thermal insulation pads or composite thermal insulation pads.

[0031] The same insulation structure 2 can use the same insulation pad or different insulation pads, and the setting directions of the insulation pads can be the same or different. The insulation structures at different locations can also be the same or different. This embodiment is shown by setting the insulation pads in the same direction.

[0032] The thermal insulation pad and the corresponding winding plane portion 3 can be bonded through the adsorption layer on the carrier release film 101 or by relying on the double-sided adhesive layer on the thermal insulation pad, and each thermal insulation pad is independently set, that is, the bonding method of the thermal insulation pad can be the same or different, as long as it can be adhered to the carrier release film 101, but for ease of processing, it is preferred to use the same bonding method.

[0033] When a double-sided adhesive layer is used for bonding, a double-sided adhesive layer may be provided for the exposed end surface of the thermal insulation pad, or a double-sided adhesive layer may not be provided. When a double-sided adhesive layer is provided, release paper is required for protection.

[0034] Example 2:

[0035] A roll-type film-bearing thermal insulation pad, such as Figure 2 As shown, it includes a release film winding structure 1 and a heat insulation structure 2. The release film winding structure 1 includes a supporting base 100 and a carrier release film 101. The supporting base 100 can be solid or hollow. This embodiment adopts a hollow structure, and a heat insulation core material 4 is filled in the middle hole of the supporting base 100. The supporting base 100 is provided with a supporting plane, and the carrier release film 101 is wound on the supporting base 100. The position of the carrier release film 101 corresponding to the supporting plane constitutes a winding plane portion 3, and it is assumed that the outward end surface of the carrier release film 101 is the front side. In this embodiment, the carrier release film 101 is wound into a rectangular structure, with a total of four winding plane portions 3, each of which is a laminated structure, and the number of laminated layers is also different. Figure 2 It can be seen that two of the winding plane portions 3 have three laminated layers, and the other two winding plane portions 3 have two laminated layers;

[0036] For the laminated winding plane portion 3, the outermost winding plane portion 3 is pasted with three rows of thermal insulation pads, and the inner winding plane portion 3 is bonded with the same three rows of thermal insulation pads on the front of the winding plane portion 3. In addition to being bonded to the front of the corresponding winding plane portion 3, the other side of the thermal insulation structure 2 of the inner layer can be bonded to the back of the adjacent layer of winding plane portion 3 or not. It is preferred to use the back bonding method. When the thermal insulation structure 2 is bonded to the back of the adjacent layer of winding plane portion 3, the bonding force between the thermal insulation structure 2 and the front of the winding plane portion 3 is different from the bonding force between the thermal insulation structure 2 and the back of the adjacent winding plane portion 3, and the minimum difference is 0.1N / 25mm. The purpose is to ensure that after the release film winding structure 1 is opened, the thermal insulation structure 2 is always located on the same side of the support release film 101, and can also be completely removed. In this embodiment, the bonding force between the thermal insulation structure 2 and the front of the winding plane portion 3 is greater than the bonding force between the thermal insulation structure 2 and the back of the adjacent winding plane portion 3.

[0037] The difference in bonding force is related to the bonding method between the thermal insulation structure 2 and the carrier release film 101. When the adsorption layer of the carrier release film 101 is used, the adsorption force of the front adsorption layer and the back adsorption layer of the carrier release film 101 are different, and the minimum difference in bonding force between the front adsorption layer and the back adsorption layer is 0.1N / 25mm; when the double-sided adhesive layer of the thermal insulation pad is used, the minimum difference in bonding force between the double-sided adhesive layer bonding the thermal insulation structure 2 to the front of the carrier release film 101 and the double-sided adhesive layer bonding the thermal insulation structure 2 to the back of the carrier release film 101 is 0.1N / 25mm.

[0038] When the exposed end surface of the outermost thermal insulation pad has a double-sided adhesive layer, that is, a thermal insulation pad with double-sided adhesive is used, the exposed double-sided adhesive layer needs to be protected by release paper. When a thermal insulation pad with single-sided adhesive is used, the non-adhesive end surface can be directly exposed and no release paper is required. The rest is the same as Example 1.

[0039] Example 3:

[0040] A roll-type film-bearing thermal insulation pad, such as Figure 3 As shown, the outermost winding plane portion 3 is not adhered to the thermal insulation structure 2, and the outermost winding plane portion 3 can be selectively wrapped with release paper. The rest is the same as Example 2.

[0041] Example 4:

[0042] A roll-type film-bearing thermal insulation pad, such as Figure 4 As shown, it includes a release film winding structure 1 and a heat insulation structure 2. In this embodiment, the release film 101 is wound into an elliptical structure. The upper and lower surfaces of the elliptical structure serve as winding plane portions 3. There are two winding plane portions 3 in total. Each winding plane portion 3 is a laminated structure, and the number of laminated layers is also different. Figure 4 It can be seen that one winding plane portion 3 has three laminated layers, and the other winding plane portion 3 has two laminated layers; for the laminated winding plane portion 3, the outermost winding plane portion 3 is pasted with three rows of thermal insulation pads, and the inner winding plane portion 3 is bonded with the same three rows of thermal insulation pads on the front of the winding plane portion 3, and the inner insulation structure 2 is bonded to the front of the corresponding winding plane portion 3, and the other side of the thermal insulation structure 2 can be bonded to the back of the adjacent layer of winding plane portion 3 or not. It is preferred to use the back bonding method. When the thermal insulation structure 2 is bonded to the back of the adjacent layer of winding plane portion 3, the bonding force between the thermal insulation structure 2 and the front of the winding plane portion 3 is greater than the bonding force between the thermal insulation structure 2 and the back of the adjacent winding plane portion 3. The purpose is to ensure that after the release film winding structure 1 is opened, the thermal insulation structure is always located on the same side of the release film 101, and can also be removed completely. The rest is the same as Example 2.

[0043] Example 5:

[0044] A roll-type film-bearing thermal insulation pad, such as Figure 5 As shown, the outermost winding plane portion 3 is not adhered to the thermal insulation structure 2, and the rest is the same as Example 4.

[0045] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0046] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A roll-shaped film-bearing thermal insulation pad, characterized in that: The invention comprises a release film winding structure (1) and a heat insulating structure (2), wherein the release film winding structure (1) comprises a supporting base (100) and a supporting release film (101), wherein the supporting base (100) is provided with a supporting plane, the supporting release film (101) is wound on the supporting base (100), and the position of the supporting release film (101) corresponding to the supporting plane constitutes a winding plane portion (3), and the heat insulating structure (2) is adhered to the winding plane portion (3).

2. The roll film bearing thermal insulation pad according to claim 1, characterized in that: The support base (100) is provided with at least two support planes, and each support plane corresponds to a winding plane portion (3).

3. The roll film bearing thermal insulation pad according to claim 2, characterized in that: At least one winding plane portion (3) is a laminated structure, and the laminated structure has at least two laminated layers.

4. The roll film bearing thermal insulation pad according to claim 3, characterized in that: The heat insulating structure (2) located on the inner winding plane portion (3) is bonded to the back surface of the adjacent winding plane portion (3); and the bonding force between the heat insulating structure (2) and the front surface of the winding plane portion (3) and the bonding force between the heat insulating structure (2) and the back surface of the adjacent winding plane portion (3) differs by at least 0.1N / 25mm.

5. The roll film bearing thermal insulation pad according to claim 3, characterized in that: The heat insulating structure (2) located on the inner layer winding plane portion (3) is not bonded to the back surface of the adjacent winding plane portion (3).

6. The roll film bearing thermal insulation pad according to claim 4 or 5, characterized in that: The heat insulation structure (2) and the winding plane portion (3) are bonded via an adsorption layer supporting the release film (101).

7. The roll film bearing thermal insulation pad according to claim 4 or 5, characterized in that: The heat insulation structure (2) and the winding plane portion (3) are bonded together via a double-sided adhesive layer.

8. The roll film bearing thermal insulation pad according to claim 4 or 5, characterized in that: The heat insulation structure (2) located on the outermost winding plane portion (3) is a single-sided adhesive heat insulation structure, the adhesive surface of the heat insulation structure (2) is adhered to the winding plane portion (3), and the non-adhesive surface of the heat insulation structure (2) is directly exposed.

9. The roll film bearing thermal insulation pad according to claim 4 or 5, characterized in that: The heat insulation structure (2) located on the outermost winding plane portion (3) is a double-sided adhesive heat insulation structure, and a tearable release paper is provided on the end surface of the heat insulation structure (2) away from the winding plane portion (3).

10. The roll film bearing thermal insulation pad according to any one of claims 1 to 5, characterized in that: The thermal insulation structure (2) comprises at least one thermal insulation pad row, each thermal insulation pad row comprises at least one thermal insulation pad layer, and each thermal insulation pad layer comprises at least one thermal insulation pad.

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