The performance of a battery may depend heavily on the demands of the electric vehicle's propulsion system during charge and discharge. At the NASA's Lewis Research Center the performance of two types of batteries, lead-acid and nickel-zinc, was measured as a function of the charging and discharging demands anticipated from electric vehicle propulsion systems. The benefits of rapid high current charging are mixed: Although it allows quick charges, the energy efficiency is reduced. For low power (overnight) charging the current wave shapes delivered by the charger to the battery cycle life. The use of chopper speed controllrs with series traction motors results in a significant reduction in the energy available from a battery whenever the motor operates at part load. The demand placed on a battery by an electric vehicle propulsion system containing electrical regenerative braking has conirmed significant improvement in short-term performance of the battery. These results have identifed strong short-term interactions between an electric vehicle propulsion system and the battery. Since there is no information on the long-term effects of these interactions, a series of research projects are under way to determine effects of these interactions on the cycle life of a battery. (ERA citation 05:027419)
Electric Vehicle Propulsion System's Impact on Battery Performance: An Overview
1980
11 pages
Report
Keine Angabe
Englisch
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