Patent ID: 9742009
Date: 2017-08-22
CPC Classifications: B21B,H01G,H01M,Y02E,Y10T

Claim:
1. A method of manufacturing an aluminum foil for a current collector, comprising: rolling an aluminum plate with rolling oil to form an aluminum foil having 150-1000 μg/m subsequently, roughening at least one surface of the aluminum foil by passing the aluminum foil between a pair of rolls using the adhered rolling oil as a lubricating oil without providing additional lubricating oil, at least one roll surface of the pair of rolls having a rough contour, and transferring the rough contour to the at least one surface of the aluminum foil such that the roughened aluminum foil satisfies the following relationships: wherein: A is an arithmetic mean roughness Ra measured in a direction at a right angle to a rolling direction during foil rolling, and B is the arithmetic mean roughness Ra measured in a direction parallel to the rolling direction during foil rolling.