Nickel-cadmium aircraft batteries: management for engine cranking

Technical Report · Mon Oct 01 04:00:00 EDT 1979

OSTI ID:5142223

Feldman, K; Verville, G

Nickel/cadmium aircraft batteries with Celgard barrier materials may be freely used for cranking turbine engines. However, frequent use for this purpose with insufficient intervening cooling still results in successive increases in battery temperature. The experiments were terminated when 'hot spot' temperatures between the cells reached 100C. Short-term experiments indicated no apparent problems. In long-term use for cranking, performance was found to deteriorate as water depletion, due to overcharge, became severe. Replacement of water and deep cycling restored the original condition. Improved cranking performance was found with initial electrolyte concentrations below the customary 30% potassium hydroxide. It is emphasized that the above comments do not apply to batteries with cellophane barriers.

• Research Organization: Defence Research Establishment, Ottawa, Ontario (Canada)
• OSTI ID: 5142223
• Report Number(s): AD-A-079687/0
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
250902* -- Energy Storage-- Batteries-- Performance & Testing
AIRCRAFT
AIRCRAFT COMPONENTS
ALKALI METALS
BATTERY SEPARATORS
CARBOHYDRATES
CELLOPHANE
ELECTRIC BATTERIES
ELECTROCHEMICAL CELLS
ELECTROLYTES
ELEMENTS
ENERGY STORAGE SYSTEMS
GAS TURBINES
HEATING
HOT SPOTS
HYDROGEN COMPOUNDS
HYDROXIDES
MACHINERY
MEMBRANES
METAL-METAL OXIDE BATTERIES
METALS
NICKEL-CADMIUM BATTERIES
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PERFORMANCE
POLYSACCHARIDES
POTASSIUM
SACCHARIDES
TURBINES
TURBOMACHINERY
WATER