THERMAL-ANALYSIS OF LITHIUM POLYMER ELECTROLYTE BATTERIES BY A 2-DIMENSIONAL MODEL-THERMAL BEHAVIOR AND DESIGN OPTIMIZATION

Thermal analysis of lithium polymer electrolyte batteries is carried o ut to examine the relationship between battery thermal behaviour and d esign parameters. By studying the effect of stack size and cooling/ins ulating conditions on battery temperature under different discharge ra tes, information is obtained as to how to maintain operating temperatu re by designing proper cell stacks and choosing proper cooling/insulat ing systems. Moreover, temperature distributions within cell stacks fo r different cell designs, including different thickness of cell compon ents and different current collector materials, are calculated so as t o carry out cell structure optimization from a heat transfer point of view. Finally, thermal characteristics of lithium polymer electrolyte batteries based on different positive electrodes (eg V6O13, TiS2 and r edox polymer) are discussed.