Absorbency of AGM separators while under compression

The absorptive characteristic of a battery separator is one of its critical parameters of performance. The ability of a separator to absorb, hold, and release electrolyte has a direct influence on the performance of a battery. To begin to understand the absorptive behavior of battery separator materials, an M/K Systems Gravimetric Absorbency Testing System (GATS) was used to investigate and characterize various separators. The separators were tested in uncompressed and compressed states, and in both horizontal and vertical positions. Total mass absorption and absorption rate data were collected.