Laminate cell, assembled battery, battery module and electric vehicle

Abstract

A laminate cell comprises 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 formed of a metal composite film, the cell package hermetically sealing the power generating element and an electrolyte. According to the laminate cell, the heat capacity of a portion of the positive tab, onto which a plurality of the positive leads are joined, and the heat capacity of a portion of the negative tab, onto which a plurality of the negative leads are joined, are made larger than that of other portions of the positive tab and the negative tab.

1 - 10 . (canceled) 
     
     
         11 . 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 formed of a metal composite film, the cell package hermetically sealing the power generating element and an electrolyte,   wherein a resin having a larger heat capacity per unit weight than that of the positive tab and the negative tab is provided on a portion where the positive and negative leads are connected to the positive and negative tabs, respectively, so that a heat capacity of the portions where the positive and negative leads are connected is made larger than that of the other portions thereof.   
     
     
         12 . A laminate cell according to  claim 11 , wherein the resin comprises polyolefin. 
     
     
         13 . A laminate cell according to  claim 12 , wherein the resin comprises a composite material including: polyolefin; and either metal particles or ceramic particles. 
     
     
         14 . A laminate cell according to  claim 12 , wherein the resin comprises a composite material including: polyolefin; and a phase change material which absorbs heat by a phase change, the phase change material being in a state of at least either microparticles or microcapsules.