2515 小型リチウムイオン二次電池の過電圧測定と放電時の温度上昇

概要

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Heat generation and temperature management are important issues for enlargement of the lithium ion secondary battery. In this study the heat generation by overpotential, which is the largest heat source for the battery, is examined comparing the measured temperature rise during the discharge cycle with the numerical analysis. The numerical temperature rise, which is calculated using the overvoltage of all voltage subtracted from open circuit voltage, is considerably bigger than the measured. As the open circuit voltage is supposed to be smaller at discharge cycle than the statically measured OCV, the overpotential was corrected as a factor of 0.46 for the cylindrical cell, and a factor of 0.85 for prismatic cell, considering the measured 30 seconds voltage drop as the overvoltage. The numerical temperature rise by the corrected overpotential is still larger than the measured.
一般社団法人日本機械学会の論文
2000-07-31