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
Separator having heat resistant insulation layers
US9312527B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9312527-B2 |
| Application number | US-201214127741-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 13, 2012 |
| Priority date | Jun 22, 2011 |
| Publication date | Apr 12, 2016 |
| Grant date | Apr 12, 2016 |
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Abstract
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A separator ( 1 ) having heat resistant insulation layers for an electric device includes a resin porous substrate ( 2 ), and heat resistant insulation layers ( 3 ) formed on both surfaces of the resin porous substrate ( 2 ) and containing heat resistant particles having a melting point or a thermal softening point of 150° C. or higher. A parameter X represented by the following mathematical formula 1 is greater than or equal to 0.15: X = ( A ′ + A ″ ) C × ( A ′ / A ″ ) 2 [ Math 1 ] where A′ and A″ represent thicknesses (μm) of the respective heat resistant insulation layers ( 3 ) formed on both surfaces of the resin porous substrate ( 2 ) while fulfilling a condition of A′≧A″, and C represents the entire thickness (μm) of the separator ( 1 ) having heat resistant insulation layers.
First claim
Opening claim text (preview).
The invention claimed is: 1. A separator having heat resistant insulation layers for an electric device, the separator comprising: a resin porous substrate; and heat resistant insulation layers formed on both surfaces of the resin porous substrate and containing heat resistant particles having a melting point or a thermal softening point of 150° C. or higher, wherein a parameter X represented by the following mathematical formula 1 is greater than or equal to 0.15: X = ( A ′ + A ″ ) C × ( A ′ / A ″ ) 2 [ Math 1 ] where A′ and A″ represent thicknesses (μm) of the respective heat resistant insulation layers formed on both surfaces of the resin porous substrate while fulfilling a condition of A′>A″, and C represents an entire thickness (μm) of the separator having the heat resistant insulation layers, wherein C is greater than or equal to 24.5 μm, and wherein a parameter Y represented by the following mathematical formula 2 is in a range from 0.3 to 0.7: Y = X ( D / 100 ) [ Math 2 ] where D represents a porosity (%) of the respective heat resistant insulation layers. 2. The separator having heat resistant insulation layers according to claim 1 , wherein the parameter X is greater than or equal to 0.20. 3. The separator having heat resistant insulation layers according to claim 1 , wherein the heat resistant particles are inorganic oxide particles. 4. The separator having heat resistant insulation layers according to claim 1 , wherein the heat resistant particles are organic resin particles. 5. The separator having heat resistant insulation layers according to claim 1 , wherein the porosity of the respective heat resistant insulation layers is in a range from 0.4 to 0.7. 6. The separator having heat resistant insulation layers according to claim 1 , wherein a total thickness of the heat resistant insulation layers is in a range from 5 μm to 200 μm, and a ratio of the thicknesses (A′/A″) of the heat resistant insulation layers is in a range from 1.037 to 1.2. 7. An electrolyte layer for an electric device, comprising: the separator having the heat resistant insulation layers according to claim 1 ; and an electrolyte contained in the resin porous substrate and the heat resistant insulation layers of the separator having the heat resistant insulation layers. 8. An electric device comprising the separator having the heat resistant insulation layers according to claim 1 .
Assignees
Inventors
Classifications
- H01M10/4235Primary
Safety or regulating additives or arrangements in electrodes, separators or electrolyte (H01M10/4242 takes precedence) · CPC title
Li-accumulators · CPC title
Particulate material · CPC title
comprising three or more layers · CPC title
comprising layers of only organic material and layers containing inorganic material · CPC title
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- What does patent US9312527B2 cover?
- A separator ( 1 ) having heat resistant insulation layers for an electric device includes a resin porous substrate ( 2 ), and heat resistant insulation layers ( 3 ) formed on both surfaces of the resin porous substrate ( 2 ) and containing heat resistant particles having a melting point or a thermal softening point of 150° C. or higher. A parameter X represented by the following mathematical fo…
- Who is the assignee on this patent?
- Muramatsu Hironobu, Hirai Tamaki, Miyatake Kazuki, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification H01M10/4235. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Apr 12 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).