Long Shelf Life Organic Electrolyte Battery
Rept. no. 4 (Final)
MALLORY (P R) AND CO INC BURLINGTON MA LAB FOR PHYSICAL SCIENCE
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The fabrication of prototype organic electrolyte-lithium cells having wide operating temperature range and high energy density has been completed. Seventy of these cells were assembled and delivered for evaluation tests. In tests of samples of these cells carried out at this laboratory, energy densities of 95 watt hours per pound at room temperature and 55 watt hours per pound at - 30C were obtained. Similar cell components were assembled to make fifteen 36 volt batteries with a diameter of 2.75 in. and a height of 5.0 inches. The discharge of a prototype battery at room temperature using the specified discharge regime was performed. Improved cells of the type used to make the 36 volt batteries were tested at room temperature on the specified loads. The contractual objective for charge retention, high efficiency performance following three months storage at 55C, was not attained. Reduced temperature storage is recommended for the cells and batteries. Some redesign of cell and battery structures is required to prevent electrolyte leakage and internal corrosion observed in the delivered end items.
- Electrochemical Energy Storage