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Battery Temperature

One of the most detrimental conditions for a battery is high temperature, particularly above 131ºF (55ºC), because the rates of corrosion, solubility of metal components, and self-discharge increase with increasing temperature. High operating temperature during cycle service requires higher charge input to restore discharge capacity and self-discharge losses. More of the charge input is consumed by the electrolysis reaction because of the reduction in the gassing voltage at the higher temperature. While 10% overcharge per cycle maintains the state of charge at 77º to 95ºF (25 to 35ºC), 35 to 40% overcharge may be required to maintain state of charge at the higher operating temperatures. On float service, float currents increase at the higher temperatures, resulting in reduced life. Eleven days float at 167ºF (75ºC) is equivalent in life to 365 days at 77ºF (25ºC). Batteries intended for high-temperature applications should use a lower initial specific gravity electrolyte than those intended for use at normal temperatures. Manufacturers should be consulted on acceptable temperature ranges for operation of their batteries and on the associated effects of temperature. Nickel-cadmium batteries may be more suitable for higher-temperature applications.


Additional information:

EN: Temperature coefficient (of the capacity)  

Quotient of the change in capacity of a cell by the corresponding change in temperature.

FR: Coefficient de température (de la capacité), m.

Quotient de la variation de capacité d’un élément par la variation correspondante de temperature.

DE: Temperaturkoeffizient (der Kapazität), m.

ES: Coeficiente de temperatura (de la capacidad).



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Last Updated: Monday, December 03, 2007 - 6:39 AM Eastern Time.