Honda Motor Co., Ltd.
CURRENT COLLECTOR STRUCTURE AND SECONDARY BATTERY HAVING THE SAME

Abstract:

To prevent the breakage of a bonding portion when current collector tabs are converged and bonded, and thereby maintain a current path. A plurality of electrode current collectors each including a metal porous body, a plurality of tabs each extending from an end of the metal porous body of each of the electrode current collectors, and a connecting tab lead that electrically connects the tabs, are included. The connecting tab lead is cross-bonded with each of the tabs to form a first compression bonding portion, and is further folded from a first of the tabs to a second of the tabs, for example, the connecting tab lead is arranged in a bellows shape. At a tab convergence location where the first compression bonding portions are stacked, the tabs are converged by forming a second compression bonding portion by ultrasonic waves or other means.