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Section 26 CYCLE TESTING OF THE 1.4kWh BATTERY SYSTEM INTRODUCTION The cycling objectives for the 1.4kWh system are to: • determine electrochemical life of ruthenized titanium chlorine electrodes • cycle system continuously in a controlled regime • collect data to fully characterize system The ruthenized-titanium chlorine electrodes that were cycled 100 times in 1975 in the l.OkWh battery system are currently undergoing life testing in the 1.4kWh sys tem. The 1.4kWh battery was put on line in April of 1976. It was first cycled in May, 1976. The hard-wired logic for this system was first interfaced to it in mid- August, 1976, followed at the end of August by the first automatically controlled cycle. In early November, 1976, attended 24-hour cycling began. Seven days later unattended cycling began and continued thereafter. A detailed description of the testing, through 1976, was published in the EPRI EM-711 Interim Report (26-1) . Briefly, 135 cycles were acquired in 1976 each delivering an average of 1.4kWh with an average electrochemical energy efficiency of 67.0%. In 1977 one hundred eighty-eight (188) cycles were accumulated during Phase I (cycle numbers 136-323). These cycles delivered 1.4kWh, on the average, with an average electrochemical energy efficiency of 66.5%. SYSTEM DESCRIPTION A complete description of the 1.4kWh battery system can be found in EPRI EM-711 Interim Report (26-1). It can best be described by visualizing four distinct loops 26-1PDF Image | Development of the Zinc-Chlorine Battery for Utility
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