Statistical analysis of lithium iron sulfide status cell cycle life and failure mode

Journal Article · Fri Aug 01 04:00:00 EDT 1980 · J. Electrochem. Soc.; (United States)

OSTI ID:5490419

Gay, E C; Battles, J E; Miller, W E

Groups of 12 or more identical Li-alloy/FeS cells fabricated by Eagle-Picher Industries, Incorporated and Gould Incorporated were operated at Argonne National Laboratory in the status cell test program to obtain data for statistical analysis of cell cycle life and failure modes. The cells were full-size electric vehicle battery cells (150-350 A-hr capacity) and were cycled at the 4 hr discharge rate and 8 hr charge rate. The end of life was defined as a 20% loss of capacity or a decrease in the coulombic efficiency to less than 95%. Seventy-four cells (6 groups of identical cells) were cycle life tested, and the results were analyzed statistically. The ultimate goal of this analysis was to predict cell and battery reliability. Testing of groups of identical cells also provided a means of identifying common failure modes which were eliminated by cell design changes. Mean time to failure for the cells based on the Weibull distribution is presented. Post-test examinations determined the causes of failure in each cell group, and corrective actions are discussed.

• Research Organization: Argonne National Laboratory, Chem. Tech. Div., Argonne, IL
• OSTI ID: 5490419
• Journal Information: J. Electrochem. Soc.; (United States), Journal Name: J. Electrochem. Soc.; (United States) Vol. 130:8; ISSN JESOA
• Country of Publication: United States
• Language: English

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25 ENERGY STORAGE
250902* -- Energy Storage-- Batteries-- Performance & Testing
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COULOMB ENERGY
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