Separator roll and method of producing same

Patent metadata

Field	Value
Publication number	US-10164234-B2
Application number	US-201615139968-A
Country	US
Kind code	B2
Filing date	Apr 27, 2016
Priority date	Apr 30, 2015
Publication date	Dec 25, 2018
Grant date	Dec 25, 2018

Abstract

A separator roll etc. capable of reducing meandering is provided. The separator roll includes a core and a battery separator wound around the core. The core has an axis hole along a central axis of the core. A value, obtained by dividing a difference between a diameter of the core and a diameter of the axis hole by a width of the core in a direction of the central axis, is not less than 0.3 and not more than 1.5.

First claim

The invention claimed is:

1. A separator roll, comprising:
a core; and
a battery separator wound around the core,
the core having an axis hole along a central axis of the core,
a take-up roller extending through the axis hole,
the take-up roller having a diameter that is smaller than the diameter of the axis hole,
the battery separator having a meandering width less than 1.00 mm,
wherein a value obtained by dividing a difference between a diameter of the core and the diameter of the axis hole by a width of the core in the direction of the central axis is not less than 0.3 and not more than 1.5,
wherein the core has a diameter of less than 125 mm, and
wherein a diameter ratio obtained by dividing the diameter of the core by the diameter of the axis hole is not less than 1.25 and not more than 1.33.

2. The separator roll as set forth in claim 1 , wherein a value obtained by dividing a diameter of the separator roll by the diameter of the axis hole of the core is not less than 2.3 and not more than 3.5.

3. The separator roll as set forth in claim 1 , wherein
the core includes:
an outer cylinder part,
an inner cylinder part provided inside the outer cylinder part, the inner cylinder part surrounding the axis hole extending along the central axis of the core, and
a plurality of support members provided, at intervals, between the outer cylinder part and the inner cylinder part so as to support them, the plurality of support members each having a length of 5 mm or more in a radial direction of the core.

4. A separator roll, comprising:
a core; and
a battery separator wound around the core,
the core having an axis hole along a central axis of the core,
a take-up roller extending through the axis hole,
the take-up roller having a diameter that is smaller than the diameter of the axis hole,
the battery separator having a meandering width less than 1.00 mm,
wherein the core has a diameter of less than 125 mm, and
wherein a diameter ratio obtained by dividing the diameter of the core by the diameter of the axis hole is not less than 1.25 and not more than 1.33.

5. A method of producing a separator roll,
the separator roll including a core and a battery separator wound around the core,
the core having an axis hole along a central axis of the core,
wherein a value obtained by dividing a difference between a diameter of the core and a diameter of the axis hole by a width of the core in the direction of the central axis is not less than 0.3 and not more than 1.5,
the core has a diameter of less than 125 mm, and
a diameter ratio obtained by dividing the diameter of the core by the diameter of the axis hole is not less than 1.25 and not more than 1.33,
the method comprising the steps of:
inserting a take-up roller into the axis hole and affixing the core to the take-up roller,
the take-up roller having a diameter that is smaller than the diameter of the axis hole; and
winding the battery separator around the core while rotating the core along with the take-up roller,
the battery separator having a meandering width less than 1.00 mm.

6. A method of producing a separator roll,
the separator roll including a core and a battery separator wound around the core,
the core having an axis hole along a central axis of the core,
the core having a diameter of less than 125 mm,
a diameter ratio, obtained by dividing the diameter of the core by a diameter of the axis hole is not less than 1.25 and not more than 1.33,
the method comprising the steps of:
inserting a take-up roller into the axis hole and affixing the core to the take-up roller,
the take-up roller having a diameter that is smaller than the diameter of the axis hole; and
winding the battery separator around the core while rotating the core along with the take-up roller,
the battery separator having a meandering width less than 1.00 mm.

Assignees

• Sumitomo Chemical Co

Inventors

• Kishimoto Hitoshi
• Tsukuda Yousuke

Classifications

• B65H75/08 Primary

  of circular or polygonal cross-section (cans or receptacles B65H75/16) · CPC title

• H01M50/406

  Moulding; Embossing; Cutting · CPC title

• H01M50/491

  Porosity · CPC title

• H01M50/489

  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

• H01M2/18 Primary

  Electricity · mapped topic