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
Multilayer porous membrane and production method thereof
US9293752B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9293752-B2 |
| Application number | US-52523208-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 23, 2008 |
| Priority date | Jan 30, 2007 |
| Publication date | Mar 22, 2016 |
| Grant date | Mar 22, 2016 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
The present invention provides a multilayer porous membrane having both high safety and practicality, especially as a separator for a non-aqueous electrolyte battery and comprising a porous layer containing an inorganic filler and a resin binder on at least one surface of a polyolefin resin porous membrane, wherein the porous layer simultaneously satisfies the following (A) to (C): (A) the inorganic filler has an average particle diameter of 0.1 μm or more and 3.0 μm or less, (B) a ratio of an amount of the resin binder to a total amount of the inorganic filler and the resin binder is 1% or more and 8% or less in terms of volume fraction, and (C) a ratio of a layer thickness of the porous layer to a total layer thickness is 15% or more and 50% or less.
First claim
Opening claim text (preview).
The invention claimed is: 1. A separator for a non-aqueous electrolyte battery comprising a multilayer porous membrane comprising a porous layer containing an inorganic filler and a resin binder adhered to at least one surface of a polyolefin resin porous membrane, wherein the porous layer simultaneously satisfies the following (A) to (C): (A) the inorganic filler has an average particle diameter of 0.1 μm or more and 3.0 μm urn or less, (B) a ratio of an amount of the resin binder to a total amount of the inorganic filler and the resin binder is 0.5% or more and 8% or less in terms of volume fraction, (C) a ratio of a layer thickness of the porous layer to a total layer thickness of the porous layer and the polyolefin resin porous membrane is 15% or more and 50% or less, and wherein a maximum MD value of a load generated as the polyolefin resin porous membrane was heated from temperature of 30° C. to 200° C. is 7 g or less. 2. The separator according to claim 1 , wherein the resin binder is a polyvinyl alcohol having a degree of saponification of 85% or more. 3. The separator according to claim 1 , wherein the polyolefin resin porous membrane surface facing the porous layer has a wetting index of 40 mN/m or more. 4. A non-aqueous electrolyte battery using a separator according to claim 1 . 5. A method of producing the separator according to claim 1 , comprising applying a dispersion solution containing the inorganic filler and the resin binder on at least one surface of the polyolefin resin porous membrane.
Assignees
Inventors
Classifications
comprising layers of only organic material and layers containing inorganic material · CPC title
Porosity · CPC title
Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties · CPC title
- H01M50/417Primary
Polyolefins · CPC title
Separators · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US9293752B2 cover?
- The present invention provides a multilayer porous membrane having both high safety and practicality, especially as a separator for a non-aqueous electrolyte battery and comprising a porous layer containing an inorganic filler and a resin binder on at least one surface of a polyolefin resin porous membrane, wherein the porous layer simultaneously satisfies the following (A) to (C): (A)…
- Who is the assignee on this patent?
- Murata Hiroshi, Naruto Hirosuke, Asahi Kasei E Materials Corp
- 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 Tue Mar 22 2016 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).