Patent ID: 9653711
Date: 2017-05-16
CPC Classifications: H01M,Y02E

Claim:
1. A flat battery, comprising: a tubular exterior can including a tubular side wall, a first bottom and a first open end, the tubular side wall extending in a tube axis direction; a sealing can including a circumferential wall, a second bottom and a second open end, the circumferential wall positioned inside the tubular side wall while the second bottom closing the first open end; a positive electrode material and a negative electrode material provided in a space formed between said exterior can and said sealing can; and a positive electrode ring used to fix said positive electrode material to said exterior can, said positive electrode ring having a cylindrical holder and a flange, the cylindrical holder having a first end and a second end, the cylindrical holder extending in said tube axis direction such that the first end is opposite to the second end in the tube axis direction, the cylindrical holder holding said positive electrode material thereinside, the flange extending outward from the second end of said holder such that the flange overlaps with the second open end of the circumferential wall of said sealing can when viewed in said tube axis direction, said flange being placed between the second open end of said circumferential wall of said sealing can and an inner surface of the first bottom of said exterior can, said negative electrode material being formed using lithium or a lithium alloy.