Battery residual capacity measuring apparatus and method for mea

Details Battery residual capacity measuring apparatus and method for mea Battery residual capacity measuring apparatus and method for mea

1996-02-29

1998-04-28

Nguyen, Vinh P.

Electricity: measuring and testing

Electrolyte properties

Using a battery testing device

324431, 340636, 320 48, 364481, G01N 27416

Patent

active

057449635

ABSTRACT:
While a power source is being supplied from a sub-battery by a voltage-current change trend calculating section, the voltage-current change trend calculating section collects currents from a battery and terminal voltages. A voltage-current approximate straight line calculating section obtains an approximately linear function, and a battery residual capacity calculating section obtains a residual capacity voltage based upon the approximately linear function and open-circuit voltages. A current storage stop discriminating section integrates the currents while the residual capacity voltage is lower than a previous residual capacity voltage, and when supplying from the sub-battery is stopped, obtains total capacity according to the open-circuit voltages at the stop and supplying and according to the integrated currents.

REFERENCES:
patent: 5193067 (1993-03-01), Sato et al.
patent: 5287286 (1994-02-01), Ninomiya
patent: 5404106 (1995-04-01), Matsuda
patent: 5592094 (1997-01-01), Ichikawa

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