PURPOSE: To improve the keeping quality of a battery by using aluminum or aluminum alloy having a good crystal property as a negative electrode.
CONSTITUTION: A negative electrode 2 is pressedly mounted on the inner bottom surface of the negative electrode sheathing can 1. The peripheral end of the negative electrode sheathing can 1 is fixed inside an insulating packing 3, and a positive electrode sheathing can 4 is fixed to the periphery of this packing. A positive electrode 5 is fixed to the inner bottom surface of the sheathing can 4, and a separator 6, in which an electrolyte is impregnated, is interposed between the positive and the negative electrodes 5 and 2. The negative electrode 2 is composed of aluminum alloy good in a crystal property in a battery having this constitution. This aluminum or the aluminum alloy is preferable to have the value of uneven distortion of 0.012 or less. Consequently the aluminum, etc., is made difficult to be corrosive, improving the keeping property of a battery.
KONNO YOSHITO
KIMOTO MAMORU
TAKEE MASAO
MIZUTAKI FUSAGO
MATSUURA YOSHINORI
FURUKAWA SANEHIRO
