Fabrication and testing of negative-limited sealed nickel--cadmium cells. Final report, 1 Jul 1974--28 Feb 1975. [3 and 20 Ah, 1000 cycles on 30-min regime at 25% depth of discharge]

Technical Report · Mon Mar 31 00:00:00 EDT 1975

OSTI ID:7246730

Gordy, D J

A number of 20-Ah and 3-Ah negative-limited nickel--cadmium cells were fabricated and assembled in hermetically sealed stainless steel containers. The cells exhibit a large voltage rise signal, in excess of 250 mA, at the end of each charge period. They also exhibit lower self-discharge rates than conventional sealed nickel--cadmium cells and do not require overcharge. The cells are capable of operating at charge and discharge rates up to 5C and can deliver at least 1000 cycles on a 30-minute regime at 25% DOD. A small amount of gassing occurs, but is not deemed critical or detrimental in view of the facts that operating pressures are in the range of 7 to 20 psig and the cells are operated in the flooded condition and so contain little internal void volume. The cells were found to exhibit somewhat higher capacity loss rates during cycling than conventional sealed nickel--cadmium batteries. (auth)

• Research Organization: Gould, Inc., Mendota Heights, Minn. (USA)
• OSTI ID: 7246730
• Report Number(s): N-75-33493; NASA-CR-143628; REPT-752-015
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
250902* -- Energy Storage-- Batteries-- Performance & Testing
BATTERY CHARGING
ELECTRIC BATTERIES
ELECTRIC POTENTIAL
ELECTROCHEMICAL CELLS
ENERGY STORAGE SYSTEMS
FABRICATION
LIFETIME
LOSSES
MEDIUM PRESSURE
METAL-METAL OXIDE BATTERIES
NICKEL-CADMIUM BATTERIES
PERFORMANCE TESTING
SEALS
TESTING