Abstract
A 1.7 kW h battery system was built and tested in 1976 as one part of a program to develop the zinc—chloride battery for utility load-leveling. The two volt, multiple-cell battery stack is of particular interest because it embodies many of the design concepts utilized in the present technology at Energy Development Associates (EDA) for both electric vehicle and load-leveling applications, e.g., porous graphite—chlorine electrodes. From early 1977 onwards, cycle-testing of the system was conducted with a data acquisition and control system (DACS). As of June 1979, the system accumulated 1000 charge—discharge cycles. As indicated by the constancy of the voltaic efficiency, the performance deterioration through 1000 cycles was negligible. EDA plans to continue testing through 2500 cycles — the life target for the commercial version of the load-leveling battery.
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