Sumitomo Chemical Company, Limited

Yusuke Kon

Koji Kashu

Jian Wang

Tatsuya Sakamoto

Tatsuya Kataoka

Yasutoshi Minemoto

Akinobu Sakamoto

Takamasa Egawa

Yosuke Tsukuda

Hideyuki Hamamura

Akio Sakai

Wataru Sakuma

A nonaqueous electrolyte secondary battery separator film transfer device is provided which realizes a foreign object removing technique that is less likely to cause defects in a separator. The device includes a magnet bar which is arranged in a transfer path and generates a magnetic field for removing, from a separator film being transferred, a magnetic substance adhering to a first surface of the separator film; and an air cylinder which allows a distance to the magnet bar from the first surface of the separator film to be variable.

Separator film conveyance device for nonaqueous electrolytic-solution secondary battery and method for manufacturing separator film for nonaqueous electrolytic-solution secondary battery

The separator production method in accordance with an embodiment of the present invention includes a coated article taking up step of taking up a separator original sheet by winding the separator original sheet on an outer peripheral surface of a core while oscillating the core in the rotation axis direction; a coated article winding off step of winding off the separator original sheet, which has been taken up in the coated article taking up step, from the core; and a transferring step of transferring the separator original sheet, which has been wound off in the coated article winding off step, such that a state of being distorted in a wavelike manner in the transverse direction is maintained.

Method for producing film

A separator roll in accordance with an embodiment of the present invention includes a core, a heat-resistant separator wound around the core and in contact with an outer peripheral surface thereof, and a multilayer label attached to an outer layer surface of the heat-resistant separator, the multilayer label including a first film base and a second film base detachable from the first film base.

Separator roll, method for producing separator roll, and label checking method

A method of film production includes the steps of obtaining defect information including information on the position of a defect (D) in a separator original sheet (), slitting the separator original sheet () to produce a plurality of separators (), and determining, on the basis of the defect information on a single defect (D), that a separator () actually having the defect (D) and another separator () adjacent to the above separator () are defective.

Film production method and film production device

A method for film production includes the steps of obtaining information on the position of a defect (D) in a separator () and providing marks (LA, LB) at the respective positions in the vicinity of the defect (D), the marks indicating the position of the defect.

A separator producing method includes the steps of: winding up, around a core (), a separator () having a defect (D) detected; and providing a defect code (DC) including information on a position of the defect (D) in the longitudinal direction of the separator () on (i) the outermost portion () of the separator (), wound around the core (), or (ii) the core (), around which the separator () is wound.

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Daegu, South Korea

Yusuke Kon