Long porous separator sheet, roll of the same, method for producing the same, and lithium-ion battery
US-2019027727-A1 · Jan 24, 2019 · US
Long porous separator sheet, method for producing the same, roll, and lithium-ion battery
US10727463B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10727463-B2 |
| Application number | US-201615312916-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 15, 2016 |
| Priority date | Apr 15, 2016 |
| Publication date | Jul 28, 2020 |
| Grant date | Jul 28, 2020 |
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- Title
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Abstract
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A lateral surface ( 12 e ) of a long separator sheet ( 12 a, 12 b ) has a value of edge length (R)/longer side length (P) which is less than 1.04. It is therefore possible to provide the long porous separator sheet that is less likely to be torn in processing.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for producing a roll of a long porous separator sheet, said method comprising a step of slitting a porous separator original sheet in a lengthwise direction of the porous separator original sheet to obtain the long porous separator sheet, wherein the long porous separator sheet includes a plurality of layers which are a porous film layer and a porous heat resistant layer that is laminated on one surface of the porous film layer, wherein the porous heat resistant layer has a melting temperature higher than a melting temperature of the porous film layer, the slitting step including forming a lateral surface of the long porous separator sheet using a slitting section including an upper circular blade and lower blades which rotate in different directions, the upper blade making contact with one of two lower blades in a space formed between two lower blades which are adjacent in a transverse direction that is perpendicular to the lengthwise direction, the lower blades having diameters smaller than that of the upper blade, the lateral surface being formed by bringing the upper blade into contact with a surface of the porous film layer which surface is opposite to a surface contacting the porous heat resistant layer, transferring the long porous separator sheet to a winding-up roller via a roller positioned below the slitting section, and winding the long porous separator sheet on a core of the winding-up roller to form the roll of the long porous separator sheet.
Assignees
Inventors
Classifications
- H01M50/446Primary
Composite material consisting of a mixture of organic and inorganic materials · CPC title
Tensile strength · CPC title
Polyamide resins · CPC title
Polyolefins · CPC title
Moulding; Embossing; Cutting · CPC title
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Frequently asked questions
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- What does patent US10727463B2 cover?
- A lateral surface ( 12 e ) of a long separator sheet ( 12 a, 12 b ) has a value of edge length (R)/longer side length (P) which is less than 1.04. It is therefore possible to provide the long porous separator sheet that is less likely to be torn in processing.
- Who is the assignee on this patent?
- Sumitomo Chemical Co
- What technology area does this patent fall under?
- Primary CPC classification H01M50/446. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jul 28 2020 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).