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

Conference · Mon Aug 01 04:00:00 EDT 1983 · J. Electrochem. Soc.; (United States)

OSTI ID:6589464

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

A statistical model was developed for life cycle testing of electrochemical cell life cycle trials and verified experimentally. The Weibull distribution was selected to predict the end of life for a cell, based on a 20 percent loss of initial stabilized capacity or a decrease to less than 95 percent coulombic efficiency. Groups of 12 or more Li-alloy/FeS cells were cycled to determine the mean time to failure (MTTF) and also to identify the failure modes. The cells were all full size electric vehicle batteries with 150-350 A-hr capacity. The Weibull shape factors were determined and verified in prediction of the number of cell failures in two 10 cell modules. The short circuit failure in the cells with BN-felt and MgO powder separators were found to be caused by the formation of Li-Al protrusions that penetrated the BN-felt separators, and the extrusion of active material at the edge of the electrodes.

• Research Organization: Argonne National Lab., IL
• OSTI ID: 6589464
• Report Number(s): CONF-821015-
• Conference Information: Journal Name: J. Electrochem. Soc.; (United States) Journal Volume: 130
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
250902* -- Energy Storage-- Batteries-- Performance & Testing
CAPACITANCE
ELECTRIC BATTERIES
ELECTRICAL PROPERTIES
ELECTROCHEMICAL CELLS
IRON COMPOUNDS
LITHIUM-SULFUR BATTERIES
METAL-NONMETAL BATTERIES
PERFORMANCE
PHYSICAL PROPERTIES
SERVICE LIFE
TRANSITION ELEMENT COMPOUNDS