Thermal insulation material and method for producing thermal insulation material
US-2024400464-A1 · Dec 5, 2024 · US
Thermal insulation sheet between battery cells for electric automobile
US12562415B1 · US · B1
| Field | Value |
|---|---|
| Publication number | US-12562415-B1 |
| Application number | US-202519211647-A |
| Country | US |
| Kind code | B1 |
| Filing date | May 19, 2025 |
| Priority date | Oct 29, 2024 |
| Publication date | Feb 24, 2026 |
| Grant date | Feb 24, 2026 |
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- Title
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Abstract
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A thermal insulation sheet between battery cells for an electric automobile includes silica aerogel and a fiber, and has a plurality of holes on one surface and another surface in a thickness direction. A ratio of the number of holes on the one surface to the number of holes on the other surface is preferably 1.3 or more.
First claim
Opening claim text (preview).
What is claimed is: 1 . A thermal insulation sheet between battery cells for an electric automobile, the thermal insulation sheet comprising: silica aerogel; and a fiber, wherein the thermal insulation sheet has a plurality of holes on one surface and another surface in a thickness direction, and a ratio of a number of holes on the one surface to a number of holes on the other surface is 1.3 or more. 2 . The sheet according to claim 1 , wherein the number of holes on the one surface is in a range of 25,000 to 225,000 holes/m 2 . 3 . The sheet according to claim 1 , wherein the number of holes on the other surface is in a range of 10,000 to 50,000 holes/m 2 . 4 . The sheet according to claim 1 , wherein a difference between a surface roughness of the one surface and a surface roughness Sa of the other surface is 10 μm or more. 5 . The sheet according to claim 1 , wherein a difference between a surface roughness of the one surface and a surface roughness Sa of the other surface is 30 μm or more. 6 . The sheet according to claim 1 , wherein a surface roughness Sa of the one surface is 60 μm or more. 7 . The sheet according to claim 1 , wherein a surface roughness Sa of the one surface is in a range of 80 to 250 μm. 8 . The sheet according to claim 1 , wherein a surface roughness Sa of the other surface is 180 μm or less. 9 . The sheet according to claim 1 , wherein a surface roughness Sa of the other surface is in a range of 30 to 180 μm. 10 . The sheet according to claim 1 , further comprising a film that covers at least part of the one surface and the other surface. 11 . The sheet according to claim 1 , further comprising an elastic body layer that is laminated to at least part of the one surface and at least part of the other surface. 12 . The sheet according to claim 1 , further comprising: a film that covers the one surface and the other surface; and an elastic body layer that is laminated to the one surface or to the other surface via the film. 13 . A thermal insulation sheet between battery cells for an electric automobile, the thermal insulation sheet comprising: silica aerogel; and a fiber, wherein the thermal insulation sheet has a plurality of irregularities on one surface and another surface in a thickness direction, and a ratio of a surface roughness Sa of the one surface to a surface roughness Sa of the other surface is 1.3 or more. 14 . The sheet according to claim 1 , wherein: the number of holes on the one surface is in a range of 100,000 to 150,000 holes/m 2 , a surface roughness Sa of the one surface is in a range of 80 to 100 μm, the number of holes on the other surface is in a range of 20,000 to 30,000 holes/m 2 , and a surface roughness Sa of the other surface is in a range of 30 to 50 μm. 15 . The sheet according to claim 13 , wherein: the ratio of the number of holes on the one surface to the number of holes on the other surface is in a range of 2.3 to 4.4, and a difference between the surface roughness of the one surface and the surface roughness Sa of the other surface is in a range of 30 to 100 μm.
Assignees
Inventors
Classifications
- H01M10/658Primary
by thermal insulation or shielding · CPC title
Batteries in motive systems, e.g. vehicle, ship, plane · CPC title
- H01M10/625Primary
Vehicles · CPC title
Energy storage using batteries · CPC title
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Frequently asked questions
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- What does patent US12562415B1 cover?
- A thermal insulation sheet between battery cells for an electric automobile includes silica aerogel and a fiber, and has a plurality of holes on one surface and another surface in a thickness direction. A ratio of the number of holes on the one surface to the number of holes on the other surface is preferably 1.3 or more.
- Who is the assignee on this patent?
- Sumitomo Riko Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification H01M10/658. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Feb 24 2026 00:00:00 GMT+0000 (Coordinated Universal Time) (B1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 12 related publications on this page (citations in our corpus or others sharing the same primary CPC).