NOVELTY - Manufacturing a laminate cell (1), comprises: preparing positive and negative tabs which are thicker at portions, where the positive and negative (6) leads are joined to the positive and negative tabs respectively, where the other portions of the positive and negative tabs extending outside the laminate cell; and joining the positive and negative leads to the portion of the positive and negative tabs, respectively, where the laminate cell comprises a power generating element formed by sequentially stacking positive electrode plates and negative electrode plates while interposing separators.    USE - The method is useful in manufacturing the laminate cell (claimed) which is useful in assembled battery, a battery module and an electric vehicle.    ADVANTAGE - The method provide a highly reliable laminate cell, which avoids short circuit between the metal film of the metal composite film or between the metal film and the positive or negative leads.    DETAILED DESCRIPTION - Manufacturing a laminate cell (1), comprises: preparing the positive and negative tabs which are thicker at the portions, where the positive and negative (6) leads are joined to the positive and negative tabs respectively, where the other portions of the positive and negative tabs extending outside the laminate cell; and joining the positive and negative leads to the portion of the positive and negative tabs, respectively, where the laminate cell comprises a power generating element formed by sequentially stacking positive electrode plates (2A) and negative electrode plates (2B) while interposing separators (2C), a positive tab connected to the positive electrode plates through many positive leads, a negative tab connected to the negative electrode plates through many negative leads, and a cell package hermetically sealing the power generating element and an electrolyte, where a heat capacity of portions of the positive and negative tabs, to which the positive and negative leads are joined respectively, which is made larger than that of other portions.    DESCRIPTION OF DRAWING(S) - The figure shows cross sectional view of a laminate cell.    Laminate cell (1)    Positive electrode plates (2A)    negative electrode plates (2B)    Separators (2C)    Negative leads (6)