Traction battery management system

Details Traction battery management system Traction battery management system

1995-11-02

1997-07-01

Wong, Peter S.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

320 43, 320 44, H02J 700

Patent

active

056442122

ABSTRACT:
To equally charge a plurality of batteries constituting a traction battery, when the number of times of the ordinary charges increases beyond a reference value or when the sum total watt-hour (charged energy or charged and discharged energy) of the traction battery increases beyond a reference value or when a difference in terminal voltage between the maximum and minimum values among the battery blocks increases beyond a reference value, the traction battery is automatically equalizing charged at a small charge current for a long charge time, continuously after the ordinary battery charge, periodically, thus facilitating the maintenance of an electric vehicle. Further, whenever the traction battery is equalizing charged, the remaining battery capacity meter can be reset to a full scale automatically to eliminate an accumulated error. In addition, the battery life is estimated for battery replacement.

REFERENCES:
patent: 4484130 (1984-11-01), Lowndes et al.
patent: 4558281 (1985-12-01), Codd et al.
patent: 5280231 (1994-01-01), Kato et al.
patent: 5479085 (1995-12-01), Honda et al.
patent: 5568052 (1996-10-01), Sway-Tin et al.
patent: 5578915 (1996-11-01), Crouch, Jr. et al.
patent: 5583413 (1996-12-01), Proctor et al.

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