A ceramicized silicone rubber composite tape for new energy battery packs

Abstract

This utility model discloses a ceramicized silicone rubber composite strip for new energy battery packs, comprising a ceramic silicone rubber coating, fiberglass cloth, and a flame-retardant adhesive coating. The ceramic silicone rubber coating on one side of the fiberglass cloth dries to form the ceramic silicone rubber coating, and the flame-retardant adhesive coating on the other side of the fiberglass cloth dries to form the flame-retardant adhesive coating. The portion of the ceramic silicone rubber coating or the flame-retardant adhesive coating in contact with the fiberglass cloth is embedded between the corresponding fiberglass fibers. The side of the flame-retardant adhesive coating away from the fiberglass cloth is used to bond to the protective surface of components in the new energy battery pack. When a liquid lithium battery or solid-state lithium battery catches fire, both the ceramic silicone rubber coating and the fiberglass cloth harden upon heating and provide heat insulation, reducing the continued heat transfer to the cover and preventing the cover from melting and being damaged. This prevents the fire in the new energy battery pack from spreading outwards, thereby improving the safety of the new energy battery pack.

Description

Technical Field

[0001] This utility model relates to the field of safety protection technology for new energy batteries, and in particular to a ceramicized silicone rubber composite strip for new energy battery packs. Background Technology

[0002] The lithium batteries currently used in new energy vehicles include both liquid lithium batteries and solid lithium batteries.

[0003] The cover used to cover the lithium battery in the new energy battery pack is made of aluminum alloy.

[0004] When a lithium battery catches fire due to excessive current or high temperature, the ejected material from the lithium battery will touch the inner wall of the cover, causing the cover to melt and become damaged. This will allow the fire from the new energy battery pack to spread outward through the damaged cover, reducing the safety of the new energy battery pack. Utility Model Content

[0005] To address the aforementioned shortcomings, the purpose of this invention is to propose a ceramicized silicone rubber composite strip for new energy battery packs, thereby solving the problem of heat-induced damage to the cover of new energy battery packs and the resulting low safety of new energy battery pack use.

[0006] To achieve this objective, the present invention adopts the following technical solution: A ceramicized silicone rubber composite tape for new energy battery packs includes a ceramic silicone rubber coating, a glass fiber cloth, and a flame-retardant adhesive coating. The ceramic silicone rubber coating is formed after the ceramic silicone rubber applied to one side of the glass fiber cloth dries, and the flame retardant adhesive coating is formed after the flame retardant adhesive applied to the other side of the glass fiber cloth dries. The portion of the ceramic silicone rubber coating or the flame-retardant adhesive coating that contacts the glass fiber cloth is embedded between the corresponding glass fibers; The side of the flame-retardant adhesive coating away from the fiberglass cloth is used for bonding to the protective surface of the components in the new energy battery pack.

[0007] Furthermore, the ceramic silicone rubber coating is filled with hollow glass microspheres; The hollow glass microspheres flow and level within the ceramic silicone rubber coating to form a heat-insulating film layer.

[0008] Preferably, the glass hollow microspheres have a particle size of 2000-4000 mesh, and the heat insulation film has a thickness of 5-8 μm.

[0009] Furthermore, the ceramic silicone rubber coating is also filled with glass micro powder; The glass micropowder has a melting point of 400-600℃ and a particle size of 2-10μm.

[0010] Preferably, the thickness of the glass fiber cloth is 100-130 μm.

[0011] Preferably, the thickness of the ceramic silicone rubber coating is 100-130 μm.

[0012] Furthermore, it also includes release film; The release film covers the side of the flame-retardant adhesive coating that is away from the fiberglass cloth.

[0013] The beneficial effects of the technical solution of this utility model are as follows: In the case of a ceramicized silicone rubber composite strip for a new energy battery pack, when a liquid lithium battery or solid lithium battery catches fire, the ejected material from the battery pack rushes towards the ceramicized silicone rubber composite strip. The silicone rubber in the heated ceramicized silicone rubber coating decomposes to produce silicon dioxide. The silicon dioxide reacts with the ceramic powder in the ceramicized silicone rubber coating to form a ceramicized layer, causing both the ceramicized silicone rubber coating and the fiberglass cloth to harden due to heat. Both the hardened ceramicized silicone rubber coating and the fiberglass cloth have heat insulation properties, reducing the continued transfer of heat to the cover through the flame-retardant adhesive coating and preventing the cover from melting and being damaged. This prevents the fire in the new energy battery pack from spreading outwards, thereby improving the safety of the new energy battery pack. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a structure of an embodiment of the ceramicized silicone rubber composite tape for new energy battery packs according to the present invention. Among them: silicone rubber coating 1; glass fiber cloth 2; flame retardant adhesive coating 3; release film 4. Detailed Implementation

[0015] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0016] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can also refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0018] A ceramicized silicone rubber composite tape for new energy battery packs includes a ceramic silicone rubber coating 1, a glass fiber cloth 2, and a flame-retardant adhesive coating 3. After the ceramic silicone rubber coated on one side of the glass fiber cloth 2 dries, it forms the ceramic silicone rubber coating 1, and after the flame retardant adhesive coated on the other side of the glass fiber cloth 2 dries, it forms the flame retardant adhesive coating 3. The portion of the ceramic silicone rubber coating 1 or the flame-retardant adhesive coating 3 that contacts the glass fiber cloth 2 is embedded between the corresponding glass fibers; The side of the flame-retardant adhesive coating 3 away from the fiberglass cloth 2 is used to bond to the protective surface of the components of the new energy battery pack.

[0019] Figure 1 This is a schematic diagram of the structure of a ceramicized silicone rubber composite tape for new energy battery packs according to this utility model.

[0020] The ceramic silicone rubber coating 1 and the flame-retardant adhesive coating 3 are formed by coating both sides of the glass fiber cloth 2. The part of the ceramic silicone rubber coating 1 or the flame-retardant adhesive coating 3 that contacts the glass fiber cloth 2 is embedded between the corresponding glass fibers, so that each coating has better adhesion performance with the glass fiber cloth 2, which can improve the bonding strength of the ceramic silicone rubber composite tape.

[0021] By attaching the exposed surface of the flame-retardant adhesive coating 3 to the protective surface of the component in the new energy battery pack, the protective surface of the component can have good thermal shock resistance.

[0022] The above-mentioned new energy battery packs refer to liquid lithium battery packs or solid lithium battery packs, and the cover of the battery pack is made of aluminum alloy.

[0023] The ceramicized silicone rubber composite tape is adhered to the inner wall of the cover. When a liquid lithium battery or solid lithium battery catches fire, the ejected material from the battery pack rushes towards the ceramicized silicone rubber composite tape. The silicone rubber in the heated ceramic silicone rubber coating 1 decomposes to produce silicon dioxide. The silicon dioxide and the ceramic powder in the ceramic silicone rubber coating 1 undergo liquid-phase sintering under the action of glass micro powder, thus ceramicizing the ceramic silicone rubber coating 1. The glass fiber cloth 2 hardens into a porous state. Both the ceramicized ceramic silicone rubber coating 1 and the porous glass fiber cloth 2 have heat insulation properties, which can reduce the heat from continuing to be transferred to the cover through the flame-retardant adhesive coating 3 and prevent the cover from melting and being damaged by heat. This prevents the fire of the new energy battery pack from spreading outward, thereby improving the safety of the new energy battery pack.

[0024] It should be noted that the above description uses the cover as an example to illustrate the protection of components and effects of the ceramicized silicone rubber composite tape on a new energy battery pack. In practical applications, the protected components can also be other components in the new energy battery pack, or components of other products, that need to be protected from deformation or damage due to heat. Simply attach the ceramicized silicone rubber composite tape of this invention to the side of the component that needs protection facing the fire or heat source.

[0025] Furthermore, the ceramic silicone rubber coating 1 is filled with hollow glass microspheres; The hollow glass microspheres flow level in the ceramic silicone rubber coating 1 and form a heat-insulating film layer.

[0026] Hollow glass microspheres not only have good thermal insulation properties, but also good fluidity.

[0027] Before the ceramic silicone rubber coating 1 dries and solidifies, the filled glass hollow microspheres will automatically level and distribute themselves in the ceramic silicone rubber coating 1 under the action of gravity to form a heat insulation film. This heat insulation film can reduce the thermal conductivity of the ceramic silicone rubber coating 1 and improve the thermal shock resistance of the ceramic silicone rubber composite tape.

[0028] Preferably, the glass hollow microspheres have a particle size of 2000-4000 mesh, and the heat insulation film has a thickness of 5-8 μm.

[0029] The heat insulation film formed by leveling glass hollow microspheres with a particle size of 2000-4000 mesh is about 5-8 μm thick and has a good heat insulation effect.

[0030] Furthermore, the ceramic silicone rubber coating 1 is also filled with glass micro powder; The glass micropowder has a melting point of 400-600℃ and a particle size of 2-10μm.

[0031] When the ceramicized silicone rubber composite tape adhered to the protective surface of the component is heated to 400-600℃, the filling glass micropowder melts. The molten glass micropowder penetrates into the interparticle gaps of the ceramic powder in the ceramic silicone rubber coating 1, promoting ion migration and diffusion between particles, and bonding the dispersed ceramic powder with amorphous SiO2. During the continued heating process, it is sintered into a whole, which can improve the strength of the ceramic silicone rubber coating 1 under heat sintering, thereby improving the protective effect of the ceramicized silicone rubber composite tape on the component.

[0032] Preferably, the thickness of the glass fiber cloth 2 is 100-130 μm.

[0033] Glass fiber cloth 2 with a thickness of 100-130μm has good flexibility and tensile strength.

[0034] Preferably, the thickness of the ceramic silicone rubber coating 1 is 100-130 μm.

[0035] The thickness of the ceramic silicone rubber coating 1 is comparable to the thickness of the glass fiber cloth 2, which makes the glass fiber cloth 2 less prone to curling or curling during coating, thus improving the flatness of the ceramic silicone rubber composite tape.

[0036] Furthermore, it also includes release film 4; The release film 4 covers the side of the flame-retardant adhesive coating 3 that is away from the fiberglass cloth 2.

[0037] like Figure 1 As shown, a release film 4 is covered on the side of the flame-retardant adhesive coating 3 away from the glass fiber cloth 2, which gives the ceramicized silicone rubber composite tape the ability to be rolled up, improves the convenience of storing and storing the ceramicized silicone rubber composite tape, and also prevents the flame-retardant adhesive coating 3 from being contaminated due to exposure.

[0038] In summary, such as Figure 1 In the embodiment of this utility model shown, the ceramicized silicone rubber composite strip for new energy battery packs, when a liquid lithium battery or solid lithium battery catches fire, the ejected material from the battery pack rushes towards the ceramicized silicone rubber composite strip. The silicone rubber in the heated ceramicized silicone rubber coating 1 decomposes to produce silicon dioxide. The silicon dioxide reacts with the ceramic powder in the ceramicized silicone rubber coating 1 to form a ceramicized coating, which hardens the ceramicized silicone rubber coating 1 and the glass fiber cloth 2. Both the hardened ceramicized silicone rubber coating 1 and the glass fiber cloth 2 have a heat insulation effect, which can reduce the heat from continuing to be transferred to the cover through the flame-retardant adhesive coating 3 and prevent the cover from melting and being damaged by heat, thereby preventing the fire of the new energy battery pack from spreading outward, and thus improving the safety of the new energy battery pack.

[0039] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without any inventive effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. A ceramicized silicone rubber composite tape for new energy battery packs, characterized in that, Including ceramic silicone rubber coating, fiberglass cloth and flame-retardant adhesive coating; The ceramic silicone rubber coating is formed after the ceramic silicone rubber applied to one side of the glass fiber cloth dries, and the flame retardant adhesive coating is formed after the flame retardant adhesive applied to the other side of the glass fiber cloth dries. The portion of the ceramic silicone rubber coating or the flame-retardant adhesive coating that contacts the glass fiber cloth is embedded between the corresponding glass fibers; The side of the flame-retardant adhesive coating away from the fiberglass cloth is used for bonding to the protective surface of the components in the new energy battery pack.

2. The ceramicized silicone rubber composite tape for new energy battery packs according to claim 1, characterized in that, The ceramic silicone rubber coating is filled with hollow glass microspheres; The hollow glass microspheres flow and level within the ceramic silicone rubber coating to form a heat-insulating film layer.

3. The ceramicized silicone rubber composite tape for new energy battery packs according to claim 2, characterized in that, The glass hollow microspheres have a particle size of 2000-4000 mesh, and the heat insulation film has a thickness of 5-8 μm.

4. The ceramicized silicone rubber composite tape for new energy battery packs according to claim 1, characterized in that, The ceramic silicone rubber coating is also filled with glass micro powder; The glass micropowder has a melting point of 400-600℃ and a particle size of 2-10μm.

5. The ceramicized silicone rubber composite tape for new energy battery packs according to claim 1, characterized in that, The thickness of the glass fiber cloth is 100-130 μm.

6. The ceramicized silicone rubber composite tape for new energy battery packs according to claim 5, characterized in that, The thickness of the ceramic silicone rubber coating is 100-130 μm.

7. The ceramicized silicone rubber composite tape for new energy battery packs according to claim 1, characterized in that, It also includes release film; The release film covers the side of the flame-retardant adhesive coating that is away from the fiberglass cloth.

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