Lead Foil And Bipolar Lead Acid Storage Battery

Abstract

A lead foil and a bipolar lead acid storage battery capable of suppressing a voltage drop in the battery due to peeling of the lead foil from a substrate are described. The lead foil is for a current collector in a bipolar lead acid storage battery. A back face of the lead foil opposed to a substrate of the bipolar lead acid storage battery has a contact length of between 150 μm and 1800 μm, inclusive, in a profile curve acquired, orthogonally to a rolling direction, by surface roughness measurement with a stylus, and with a scanning distance of 4 mm and a measurement interval of 0.5 μm, the contact length is a sum total of respective absolute values of differences in height between adjacent measurement points.

Dependencies are inferred from the claim text.