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Accession Number:
AD0838775
Title:
FAILURE MECHANISMS AND ACCELERATED LIFE TESTS FOR BATTERIES,
Corporate Author:
BATTELLE MEMORIAL INST COLUMBUS OH COLUMBUS LABS
Report Date:
1968-04-01
Abstract:
This report consists of a general conceptual framework, including definitions of terms and methods of analysis, for accelerated life tests of batteries. In Part I, the principal methods suitable for analysis of accelerated test data are reviewed and classified as empirical, statistical, or physical. Strengths and weaknesses of each approach are indicated. The use of three approaches is recommended. Part II consists of specific definitions of the following terms for batteries within-cycle quality, degradation of quality between cycles, stress factor, and failure. Quantitative measures are given for the temperature quality, voltage quality, and pressure quality of a battery within a charge or discharge cycle. The physical concepts which underlie these definitions are discussed in Part III in an attempt to provide a correlation between failure mechanisms and stress levels for accelerated life tests. Four stresses for an accelerated test are suggested to be temperature, voltage, gas pressure, and mechanical stress. Each stress is subject to control through the control of an appropriate strain or rate of strain, either externally or internally to the battery. Author
Pages:
0097
Contract Number:
AF 33(615)-3701
File Size:
0.00MB
