Temperature effects on nickel/iron battery characteristics

The performance of an improved Ni/Fe electric vehicle battery applications was measured at ambient temperatures of 0, 25 and 50/sup 0/C for a range of overcharge levels (3 to 80%), open-circuit stand times (0 to 4 h), and charge (1 to 6 h) and discharge (1 to 3 h) rates. Charges and discharges were also performed at different battery operating temperatures to differentiate the effects of temperature on battery charge acceptance and available discharge capacity. The results show that the discharge capacity increases with an increase in the operating temperature, but that the charge acceptance is maximal at 25/sup 0/C.