The Amersil corrugated TGL400 separator with 78.5%
volume porosity has been tested in gel motive power cells
and compared to a competitor’s ribbed separator with 70%
porosity. The discharge was performed with 62.5 A at 6 h
rate to 1.70 Vpc (100% depth of discharge). The charge was
performed at 75 A until 1.08 charge factor with a cut-off
voltage of 2.33 Vpc.
Results of capacity and recharge times are shown on
Figs. 6 and 7. From beginning to 200 cycles, the capacity
of cells insulated with Amersil TGL is slightly higher or
comparable to the competition separator. After 250 cycles,
however, the capacity is 10% higher with the Amersil
corrugated separator, due to higher porosity and lower
electrical resistance (Fig. 6). A second test performed with
a 12 h standard BCI cycle-life test confirms these results on
capacity (Fig. 8).