Method for diagnosing battery condition

Details Method for diagnosing battery condition Method for diagnosing battery condition

1996-10-31

1998-04-14

Tso, Edward

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

320 43, 320 48, H01M 1046, H01M 1044

Patent

active

057396701

ABSTRACT:
A method for diagnosing the general condition of a battery module in a string of such modules comprising a battery pack monitors voltage, current and temperatures of the modules and battery pack. Accumulators account for various charge quantities including charge out and net charge used for the battery pack as well as discharge period durations. State of charge is provided by appropriate means and used to update module capacities. The various charge and time accumulators are used to derive depth of discharge and discharge rate information providing inputs to predetermined functions for determining a simple scalar outputs directly indicative of the general condition of the modules.

REFERENCES:
patent: 4234840 (1980-11-01), Konrad et al.
patent: 4677363 (1987-06-01), Kopmann
patent: 5504415 (1996-04-01), Podrazhansky et al.
patent: 5578915 (1996-11-01), Crouch, Jr. et al.
patent: 5614804 (1997-03-01), Kayano et al.

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