Measurement of short circuit current for low internal resistance batteries

A method of measuring short circuit current has been established for high power and low internal resistance batteries. The battery was forcibly discharged at a constant resistance much smaller than its internal resistance by a newly constructed short circuit switch. Current and voltage were then monitored by a digital memory scope. Pasted-type and tubular-type lead-acid batteries were used as samples in this work. Short circuit current was also observed for the batteries in various states-of-charge.