Non-destructive Quality Testing of Battery Separators

The growing demand and new fields of application compel battery manufacturers to higher product quality. As the battery separator is the main safety element of a battery cell, defect-free separators are a prerequisite for safe lithium-ion batteries. Hence, typical production defects have to be reliably detected by 100-percent inspection methods. For that reason, this paper presents the design of a non-destructive inspection approach for battery separator quality testing. Based on a requirements analysis the most appropriate test method is selected. Subsequently, a detailed implementation concept is derived and proven within a real production scenario.