Battery system, battery monitoring method and apparatus

Details Battery system, battery monitoring method and apparatus Battery system, battery monitoring method and apparatus

2007-02-06

2007-02-06

Easthom, Karl (Department: 2838)

Electricity: battery or capacitor charging or discharging

Battery or cell discharging

With charging

C324S433000

Reexamination Certificate

active

10785408

ABSTRACT:
A battery performance monitoring system anticipates the sudden fall of battery output. The system measures the battery voltage at a time point when the discharge current of a battery becomes smaller than the reference current value or at a time point when the current to the load which is connected to the battery becomes smaller than the reference current value, and judges the battery to be abnormal if the difference of the measured battery voltage from the approximate formula in regard to the current-voltage relation in the former half of a same discharge event becomes out of the reference range.

REFERENCES:
patent: 5675258 (1997-10-01), Kadouchi et al.
patent: 6624533 (2003-09-01), Swanson et al.
patent: 6943525 (2005-09-01), Toya et al.
patent: 2003/0155160 (2003-08-01), Nomura et al.
patent: 11-052034 (1999-02-01), None

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