| 摘要 |
PROBLEM TO BE SOLVED: To provide a flat secondary battery in which filling work of liquid or the like can be carried out efficiently and welding reliability at the ultrasonic welding part of a can (positive electrode can) on the positive electrode terminal side and a positive electrode lead can be secured, and furthermore, corrosion at the edge portion of the positive electrode can hardly occurs, while installation work of an insulting tape can be dispensed with. SOLUTION: A positive electrode lead of aluminum foil integrated with each of positive electrode current collectors is led out from those of an electrode body to the side direction of the electrode body, and tip parts of these are welded to the inner face of a sealing can, and a negative electrode current collector is arranged at the end face on the opposing side to the inner face of an outer package can in the lamination direction of the electrode body, and is electrically connected to the inner face of the outer package can, thereby the sealing can is placed on the positive electrode side and the outer package can is placed on the negative electrode side. COPYRIGHT: (C)2010,JPO&INPIT |
