| 摘要 |
PROBLEM TO BE SOLVED: To provide a battery pack having film outer package batteries in which, even when gas generated inside the batteries is accumulated, the inner pressure hardly rises and safety is improved, and the battery characteristics are stabilized for a long period as adhesion of the electrode plates is maintained for a long period, and its manufacturing method. SOLUTION: Since the length L1 in lead terminal extraction direction in the inner space of the batteries is longer than the length L2 in the same direction of the top face of a cup molded outer package 2, a gap 9 is formed at the outside portion of the cup molded outer package 2, With the existence of this gap 9, even if gas is generated inside the batteries, the lid side outer package below the gap 9, that is, the outer package in the vicinity of a sealing part of the lead terminal is deformed upward, thereby gas can be contained inside this. COPYRIGHT: (C)2011,JPO&INPIT |
