Separator core and separator roll
AssigneeSumitomo Chemical Company, Limited
InventorsYosuke TSUKUDA, Daizaburo YASHIKI
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Abstract
The present invention achieves a separator core that is easy to clean and that will have no or few remaining foreign substances and a separator roll obtained by winding a separator around the separator core. Provided is a separator core around which a separator is wound or is to be wound, in which at least one of (i) a connection between a surface of a support part and the inner peripheral surface of the outer cylindrical part and (ii) a connection between the surface of the support part and the outer peripheral surface of the inner cylindrical part is made smoothly by a curved face.
Claims7
A separator core around which a separator for a nonaqueous electrolyte secondary battery is wound or is to be wound, comprising:
- an outer cylindrical part;
- an inner cylindrical part provided inside the outer cylindrical part;
- and
- support parts that are provided between the outer cylindrical part and the inner cylindrical part and that extend in radial directions to connect to the outer cylindrical part and the inner cylindrical part,
- wherein at least one of (i) a connection between a surface of at least one of the support parts and an inner peripheral surface of the outer cylindrical part and (ii) a connection between the surface of the at least one of the support parts and an outer peripheral surface of the inner cylindrical part is made smoothly by a curved face.
Dependencies are inferred from the claim text.