Patent ID: 8206848

Claim:
A secondary battery cell, comprising: a plate-shaped electrolyte layer; a cathode formed on one main surface of said electrolyte layer; an anode formed on the other main surface of said electrolyte layer; and a collector electrode formed adjacent to said cathode or said anode; wherein said collector electrode includes a contact area in contact with said cathode or said anode, a terminal portion formed in said collector electrode and not in contact with said cathode or said anode, and a connecting portion formed in said terminal portion to be connected to a conductive member; and wherein as compared with cross-sectional area of said terminal portion forming a first current path between said connecting portion and a first portion of said contact area closest to said connecting portion, cross-sectional area of said terminal portion forming a second current path between said connecting portion and a second portion of said contact area positioned at a peripheral portion of said contact area and extending along said terminal portion and having longer length to said connecting portion than path length of said first current path, is made larger, and wherein thickness of said terminal portion where said second current path is positioned is made thicker than said terminal portion where said first current path is positioned.