Electrode plate unit and battery

摘要

An electrode plate unit comprising
a group of electrode plates in which a plurality of positive electrode plates (2) and a plurality of negative electrode plates (3) are laminated alternately via separators (4), and
a collector plate (5) connected to one side face of the group of electrode plates by a plurality of welding portions (7),
wherein the interval between the welding portions (7) in the connection portion between the collector plate (5) and the group of electrode plate is set to be narrower in the region in which the density of electric current collected by the collector plate is higher.