Analysis of Accelerated Life Test Data for Aerospace Nickel-Cadmium Cells.
Final rept. Nov 72-Jul 74,
INVENTION TALENTS INC COLUMBUS OHIO
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A process was developed for the accelerated life testing of a particular cell or battery which comprises the comparison and extrapolation of the end of discharge voltages plotted versus the logarithm of the cycle number in combination with prior knowledge about the probable cycles to failure for similar cells or batteries under the same end use conditions. When the slope of the voltage-log cycle line in the test can be made to coincide with similar slopes from prior knowledge, the battery under test will have the same cycle life and failure mechanism as prior cells or batteries. Acceleration of the test results is achieved because a duplication slope for the data obtained during about the first hundred cycles indicates the probable presence of thousands of cycles anticipated by the prior knowledge.
- Electrochemical Energy Storage
- Test Facilities, Equipment and Methods