Control system for, in the presence of a varying system load, es

Electricity: battery or capacitor charging or discharging – Battery or cell discharging – With charging

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320DIG21, 324430, H01M 1044, H01M 1046

Patent

active

060912286

ABSTRACT:
A controller for a hybrid electric system such as a hybrid electric vehicle includes a load, a battery, and a controllable source of auxiliary electricity. The state of charge (SOC) of the battery is estimated, and an error signal is generated which represents the difference between a desired and actual SOC. The SOC error signal is processed by at least integration, to produce a source signal representing the desired auxiliary source current. A second error signal is generated between the actual current. from the auxiliary source and the desired current from the auxiliary source. The second error signal is processed, at least by integration, to produce a control signal for controlling the auxiliary signal source.

REFERENCES:
patent: 3895284 (1975-07-01), Schweizer et al.
patent: 4433278 (1984-02-01), Lowndes et al.
patent: 4937528 (1990-06-01), Palanisamy
patent: 5488300 (1996-01-01), Jamieson
patent: 5659240 (1997-08-01), King

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