Nickel-hydride battery life determining method and life...

Details Nickel-hydride battery life determining method and life... Nickel-hydride battery life determining method and life...

2007-11-30

2008-12-02

Ullah, Akm E (Department: 2838)

Electricity: measuring and testing

Electrolyte properties

Using a battery testing device

C324S432000, C320S132000

Reexamination Certificate

active

07459912

ABSTRACT:
Data indicating a relationship of life of a battery to a value of load power applied to the battery in discharge and environmental temperature of a place where the battery is installed are prepared beforehand. Next, the load power and the environmental temperature when the battery is discharged are measured, and then a life value corresponding to these measured values is selected from the data so as to be set as an expected life value. Next, a first life reduction amount is calculated from a natural logarithmic function with the number-of-discharges as a variable, and the difference between the expected life value and the first life reduction amount is set to a remaining life value, on the basis of which the life of the nickel-hydride battery is determined. By this method, the life of the nickel-hydride battery as a backup power source can be accurately determined, while correction based on phenomena unique to the nickel-hydride battery is performed.

REFERENCES:
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Chinese Office Action issued in Chinese Patent Application No. CN 200580053328, dated Mar. 7, 2008.

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