Patent ID: 9496541
Filing Date: 2016-11-15
CPC Classification: H01G,H01M,Y02E,Y02P

Claim Text:
1. An accumulator device comprising: an outer container with mutually overlapped outer films bonded air-tightly to each other at a bonding portion formed along respective outer peripheral edge portions; an electrode unit accommodated inside the outer container and having a positive electrode sheet and a negative electrode sheet stacked one on another with a separator disposed therebetween, the positive electrode sheet and the negative electrode sheet each having a current collector on which an electrode layer is formed; a positive electrode terminal and a negative electrode terminal which are provided so as to protrude from inside the outer container to outside the outer container through the bonding portion; and an electrolytic solution injected in the outer container, wherein the positive electrode terminal has an aluminum terminal substrate and a nickel-plating coating formed on a surface of an outer end portion of the terminal substrate located outside the outer container, wherein an inner edge of the nickel-plating coating is located within the bonding portion, the thickness of the nickel-plating coating is 1 to 3 μm, and a protective film is provided between the positive electrode terminal and one of the outer films at the bonding portion.