Evaluation method of separator for nonaqueous electrolyte battery, and nonaqueous electrolyte battery

摘要

The evaluation method of a separator for a nonaqueous electrolyte battery according to the present invention includes: placing opposite an upper jig 21 serving also as a conductive electrode and a lower jig 23 serving also as a conductive electrode in both sides of the separator sample 22; and measuring the relationship between an applied voltage and a passed current between the upper jig 21 and the lower jig 23 while applying a pressure to between the upper jig 21 and the lower jig 23 to evaluate the separator. At this time, by fitting a foreign material 28 in any shape between the separator sample 22 and one of the upper jig 21 and the lower jig 23, an evaluation of the separator simulating the presence of a foreign material affecting adversely the separator can be performed.