ELECTRODE SET FOR EVALUATING HEAT RESISTANCE OF SEPARATOR FOR LITHIUM ION SECONDARY BATTERY, AND METHOD FOR EVALUATING HEAT RESISTANCE OF SEPARATOR FOR LITHIUM ION SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To provide an electrode set for evaluation, enabling evaluation of a heat resistance property from a standpoint to see whether or not a separator can prevent a thermal runaway in heat resistance evaluation of the separator for a lithium ion secondary battery without performing a complicated operation such as assembly of a lithium ion secondary battery, and to provide a heat resistance evaluation method using the electrode set.SOLUTION: An electrode set for evaluating heat resistance of a separator for a lithium ion secondary battery includes: two thin flat electrodes sandwiching the separator; two elastic plates sandwiching the two thin flat electrodes; two hard members sandwiching the two elastic plates. A heat resistance evaluation method includes: applying electric voltage between the thin flat electrodes of the electrode set for evaluating heat resistance; and measuring a time change of electric power.