Separator for secondary battery, manufacturing method thereof, method for manufacturing secondary battery comprising the separator and secondary battery manufactured by the method
US-12183949-B2 · Dec 31, 2024 · US
Nonaqueous electrolyte secondary battery separator
US2019119476A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2019119476-A1 |
| Application number | US-201816163644-A |
| Country | US |
| Kind code | A1 |
| Filing date | Oct 18, 2018 |
| Priority date | Oct 20, 2017 |
| Publication date | Apr 25, 2019 |
| Grant date | — |
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Abstract
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As a nonaqueous electrolyte secondary battery separator having a transverse direction/machine direction crease recovery angle ratio of close to 1, a nonaqueous electrolyte secondary battery separator is provided that includes a polyolefin porous film having a ratio of a 60-degree gloss in an machine direction to a 60-degree gloss in a transverse direction which ratio is not less than 1.00.
First claim
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1 . A nonaqueous electrolyte secondary battery separator comprising: a polyolefin porous film, the polyolefin porous film having a ratio of a 60-degree gloss in an machine direction to a 60-degree gloss in a transverse direction which ratio is not less than 1.00. 2 . The nonaqueous electrolyte secondary battery separator according to claim 1 , further comprising: an insulating porous layer. 3 . The nonaqueous electrolyte secondary battery separator according to claim 2 , wherein the insulating porous layer contains at least one resin selected from the group consisting of a polyolefin, a (meth)acrylate-based resin, a fluorine-containing resin, a polyamide-based resin, a polyester-based resin, and a water-soluble polymer. 4 . The nonaqueous electrolyte secondary battery separator according to claim 3 , wherein the polyamide-based resin is aramid resin. 5 . A nonaqueous electrolyte secondary battery member comprising: a positive electrode; a nonaqueous electrolyte secondary battery separator according to claim 1 ; and a negative electrode, the positive electrode, the nonaqueous electrolyte secondary battery separator, and the negative electrode being disposed in this order. 6 . A nonaqueous electrolyte secondary battery comprising: a nonaqueous electrolyte secondary battery separator according to claim 1 . 7 . A nonaqueous electrolyte secondary battery member comprising: a positive electrode; a nonaqueous electrolyte secondary battery separator according to claim 2 ; and a negative electrode, the positive electrode, the nonaqueous electrolyte secondary battery separator, and the negative electrode being disposed in this order. 8 . A nonaqueous electrolyte secondary battery comprising: a nonaqueous electrolyte secondary battery separator according to claim 2 .
Assignees
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Classifications
comprising layers of only organic material and layers containing inorganic material · CPC title
Polyamide resins · CPC title
- H01M50/417Primary
Polyolefins · CPC title
Construction or manufacture · CPC title
- C08L23/06Primary
Polyethylene · CPC title
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- What does patent US2019119476A1 cover?
- As a nonaqueous electrolyte secondary battery separator having a transverse direction/machine direction crease recovery angle ratio of close to 1, a nonaqueous electrolyte secondary battery separator is provided that includes a polyolefin porous film having a ratio of a 60-degree gloss in an machine direction to a 60-degree gloss in a transverse direction which ratio is not less than 1.00.
- Who is the assignee on this patent?
- Sumitomo Chemical Co
- What technology area does this patent fall under?
- Primary CPC classification H01M50/417. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Thu Apr 25 2019 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).