Method and apparatus for producing battery separator roll

Patent metadata

Field	Value
Publication number	US-9786884-B2
Application number	US-201514780681-A
Country	US
Kind code	B2
Filing date	Feb 9, 2015
Priority date	Oct 10, 2014
Publication date	Oct 10, 2017
Grant date	Oct 10, 2017

Abstract

The present invention provides a long separator roll. A method according to the present invention for producing a battery separator roll includes a connecting step of connecting two or more separators ( 12 b and 12 c ) to each other along a lengthwise direction so that the battery separator roll is produced.

First claim

The invention claimed is:

1. A method for producing a battery separator roll, comprising:
a first slitting step of slitting one or more battery separators into two or more battery separators having a prescribed first width;
a connecting step of connecting the two or more battery separators obtained by slitting to each other along a lengthwise direction;
a second slitting step of slitting a sheet of the two or more battery separators having been connected to each other, into a slit battery separator having a second prescribed width, so that the two or more battery separators are aligned in a transverse direction; and
a cutting step of cutting off a defected contained in the slit battery separator after the second slitting step, by cutting the slit battery separator in a transverse direction,
in the cutting step, the slit battery separator being cut into two or more cut battery separators.

2. The method as set forth in claim 1 , wherein:
in the connecting step, the two or more battery separators each having a length less than a prescribed length are connected to each other along the lengthwise direction, so that the battery separator roll having the prescribed length is produced.

3. The method as set forth in claim 1 , wherein:
the two or more battery separators have lengths different from each other in the lengthwise direction, respectively.

4. The method as set forth in claim 1 , wherein:
in the connecting step, the two or more battery separators are connected to each other along the lengthwise direction with an adhesive tape.

Assignees

• Sumitomo Chemical Co

Inventors

• Matsuo Takahiro
• Yoneyama Satoshi

Classifications

• H01M50/429

  Natural polymers · CPC title

• H01M50/457

  comprising three or more layers · CPC title

• H01M50/423

  Polyamide resins · CPC title

• H01M50/451

  comprising layers of only organic material and layers containing inorganic material · CPC title

• H01M50/417

  Polyolefins · CPC title