Low earth orbit nickel cadmium battery lifetime testing

Computer Science

Scientific paper

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Charge Efficiency, Earth Orbital Environments, Electric Equipment Tests, Nickel Cadmium Batteries, Service Life, Dry Cells, Space Environment Simulation, Temperature Effects, Test Facilities, Thermal Simulation

Scientific paper

The status of the ongoing lifetime tests of NiCd batteries cycling under low earth orbit conditions is described. Most of the batteries have been cycling for four years under low earth orbit conditions at the ESTEC battery test center. End of charge and discharge voltages as a function of cycles, temperature, depth of discharge, and the presence or absence of six-monthly capacity checks is presented. Comparisons are made between the behavior observed with simple charge-discharge cycling regimes and that observed for a battery subjected to a realistic power profile expected for the earth observation satellite ERS-1.

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