Battery, electrode, and current collector used therefor

摘要

A current collector for an electrode is disclosed which comprises a base portion with a flat face, a plurality of primary projections projecting from said flat face and being disposed, at intersection points of a plurality of first virtual straight lines disposed parallel to one another with a first pitch in said flat face, and a plurality of second virtual straight lines disposed perpendicular to said first virtual straight lines with a second pitch that is smaller than said first pitch in said flat face, and at the center of a rectangle formed by two adjacent first virtual straight lines and two adjacent second virtual straight lines as well as a plurality of secondary projections projecting from the top of said primary projections.