Patent ID: 8491673
Filing Date: 2013-07-23
Classification: H01M,Y02E,Y02P,Y10T

Abstract:
1. A method for production of a stacked battery having a plurality of positive electrode current collection tabs and a plurality of negative electrode current collection tabs drawn out from a stacked member formed by laying positive electrodes and negative electrodes alternately one on the other with separators interposed between them and bonded respectively to a positive lead terminal and a negative lead terminal, the method comprising: a step of determining in advance a simultaneously bondable number, or the number of positive electrode current collection tabs or the number of negative electrode current collection tabs that can be laid one on the other and collectively bonded, and bonding conditions for bonding them; and a step of forming groups of positive current collection tabs or negative current collection tabs, each group being formed by laying a number of current collection tabs not exceeding the simultaneously bondable number one on the other, displacing the bonding positions of the groups of positive electrode current collection tabs or those of negative electrode current collection tabs relative to each other in the direction of drawing out the positive electrode current collection tabs or the negative electrode current collection tabs, and collectively bonding all of the positive electrode current collection tabs or all of the negative electrode current collection tabs of each group under the bonding conditions, and the junctions of the groups of positive electrode current collection tabs or the groups of negative electrode current collection tabs and the positive electrode lead terminal or the negative electrode lead terminal, are arranged with spaced apart from each other from the stacked member on the surface of the positive electrode lead terminal or the negative electrode lead terminal, without displacing the positions in the direction perpendicular to the directions of drawing out the positive electrode current collection tabs or the negative electrode current collection tabs, of the groups and the groups of positive electrode current collection tabs or the groups of negative electrode current collection tabs, are bonded sequentially in the order of closeness to the positive electrode lead terminal surface or the negative electrode lead terminal surface, as viewed from the side close to toward the side remote from the stacked member.