BATTERY AND MANUFACTURE OF BATTERY CAN

摘要

PROBLEM TO BE SOLVED: To provide a battery improving its volumetric energy density and weight energy density by making a battery can thin and lightweight. SOLUTION: A power generating element is stored in a battery can 6 formed of clad material connected with an aluminum material and an iron material into a bottomed tubular shape having the bottom face thickness/side peripheral face thickness ratio of 1.2-5.0 by the DI method to form a battery. The battery is made lightweight by using aluminum material, and the low pressure-proof strength of the aluminum material can be offset by the rigidity of the iron material. The side peripheral face 6b of the battery can 6 can be made thin, the storage quantity of the power generating element is increased by the increase of the internal capacity of the battery can 6, and the volumetric energy density and weight energy density of the battery can be improved.