Experiments Study on Charge Technology of Lead-Acid Electric Vehicle Batteries

摘要

The basic theory of the fast charge and several charge methods are introduced.In order to heighten charge efficiency of valve-regulated lead-acid battery and shorten the charge time,five charge methods are investigated with experiments done on the Digatron BNT 400-050 test bench.Battery current,terminal voltage,capacity,energy and terminal pole temperature during battery experiment were recorded,and corresponding curves were depicted.Battery capacity-time ratio,energy efficiency and energy-temperature ratio are put forward to be the appraising criteria of lead-acid battery on electric vehicle(EV).According to the appraising criteria and the battery curves,multistage-current/negative-pulse charge method is recommended to charge lead-acid EV battery.