Method and apparatus for measuring battery capacity using voltag

Details Method and apparatus for measuring battery capacity using voltag Method and apparatus for measuring battery capacity using voltag

1998-12-18

2000-09-12

Metjahic, Safet

Electricity: measuring and testing

Electrolyte properties

Using a battery testing device

324430, 324432, 320129, 320139, G01N 27416, H02J 700, H02J 704

Patent

active

061182753

ABSTRACT:
A method of measuring battery capacity using a voltage response signal based on a pulse current, where the method includes the steps of: measuring a voltage response signal based on a pulse current signal applied to a primary or secondary battery; performing an approximation of the measured voltage response signal to an equivalent circuit model composed of resistors, capacitors and transmission lines to determine the model parameters; and determining the unknown battery capacity from the voltage response characteristics based on a correlation between the measured capacity and the model parameters, which correlation is previously determined by a real-time discharge method, thereby takes a shorter time than a real-time discharge method and delivering efficiency and reliability in determining model parameters of an equivalent circuit which are in close correlation with the charge/discharge condition of the battery.

REFERENCES:
patent: 3808487 (1974-04-01), Feuillade
patent: 4678998 (1987-07-01), Muramatsu
patent: 4743855 (1988-05-01), Randin et al.
patent: 4952862 (1990-08-01), Biagetti
patent: 5241275 (1993-08-01), Fang
patent: 5703486 (1997-12-01), Arai et al.
patent: 5717336 (1998-02-01), Basell et al.

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