Patent ID: 8426060

Claim:
A method of manufacturing a laminate cell comprising: a power generating element formed by sequentially stacking positive electrode plates and negative electrode plates while interposing separators therebetween; a positive tab connected to the positive electrode plates through a plurality of positive leads; a negative tab connected to the negative electrode plates through a plurality of negative leads; and a cell package hermetically sealing the power generating element and an electrolyte, wherein a heat capacity of portions of the positive and negative tabs, to which the positive and negative leads are joined respectively, is made larger than that of other portions thereof, the method comprising: preparing the positive and negative tabs which are thicker at the portions where the positive and negative leads are joined to the positive and negative tabs, respectively, than the other portions of the positive and negative tabs extending outside the laminate cell, the positive and negative tab being formed of a single layer; and joining the positive and negative leads to the portion of the positive and negative tabs, respectively.