Method for evaluating gas generation behavior of lithium secondary batteries using strain gauges

摘要

The present invention is a method for evaluating the gas generation behavior of a lithium secondary battery, by attaching a strain gauge whose output voltage value varies according to the degree of deformation by the expansion of the battery case to the outer surface of the gas pocket, and outputting the strain gauge according to the evaluation conditions It involves measuring the voltage. The evaluation method of the present invention has the effect of being able to sensitively detect a change in volume due to generation of internal gas, and more accurately measure the amount of change in volume.