US2016268569A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016268569-A1 |
| Application number | US-201615066598-A |
| Country | US |
| Kind code | A1 |
| Filing date | Mar 10, 2016 |
| Priority date | Mar 13, 2015 |
| Publication date | Sep 15, 2016 |
| Grant date | — |
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Official abstract text for this publication.
The present invention provides a separator roll ( 10 ) and the like including a core suited for reuse. The separator roll ( 10 ) includes: a porous separator ( 12 ) for use in a battery; and a core ( 8 ) around which the separator ( 12 ) is wound. The outer circumferential surface (S) of the core ( 8 ) has arithmetic mean roughness of not less than 3.7 μm, the outer circumferential surface (S) being in contact with the separator ( 12 ).
Opening claim text (preview).
1 . A separator roll comprising: a battery separator being porous; and a core around which the battery separator is wound, the core having an outer circumferential surface whose arithmetic mean roughness is not less than 3.7 μm, the outer circumferential surface being in contact with the battery separator. 2 . A separator roll comprising: a battery separator being porous; and a core around which the battery separator is wound, the core having an outer circumferential surface whose root mean square roughness is not less than 4.0 μm, the outer circumferential surface being in contact with the battery separator. 3 . The separator roll according to claim 1 , wherein one end of the battery separator is fixed to the outer circumferential surface, the one end being in contact with the outer circumferential surface. 4 . The separator roll according to claim 1 , wherein the battery separator comprises a functional layer facing the outer circumferential surface. 5 . The separator roll according to claim 1 , wherein a material for the core includes resin. 6 . A method for producing a battery, the method comprising the steps of: winding off the battery separator from the separator roll according to claim 1 ; and arranging the battery separator having been wound off such that it is sandwiched between a cathode and an anode. 7 . A method for producing a separator roll, the method comprising the steps of: conveying a battery separator, the battery separator being porous; and winding the battery separator being conveyed around a core, the core having an outer circumferential surface whose arithmetic mean roughness is not less than 3.7 μm. 8 . A method for producing a separator roll, the method comprising the steps of: conveying a battery separator, the battery separator being porous; and winding the battery separator being conveyed around a core, the core having an outer circumferential surface whose root mean square roughness is not less than 4.0 μm.
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