Electric power system for automotive vehicle

Details Electric power system for automotive vehicle Electric power system for automotive vehicle

1993-03-30

1994-08-02

Hickey, R. J.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

307 16, 322 90, 322 7, H02J 714, H02P 930

Patent

active

053349261

ABSTRACT:
An electric power system for an automotive vehicle is provided with a generator to which a 48-volt battery, a blower motor and a DC--DC converter are connected in parallel. An output terminal of the converter is connected to a load which is constituted by a 12-volt battery, a head lamp, a vehicle speed sensor and a resistance to which a switch is connected in series. The system is further provided with a voltmeter for detecting a voltage value of the 12-volt battery and an ammeter for detecting a load current applied to the load, a controller for controlling the converter and the switch. The controller controls the converter to start operation and the switch to be turned on when the voltage value detected by the volt-meter is lower than a first predetermined value and the load current detected by the ammeter is smaller that a second predetermined value. Accordingly, an operating period of the converter is shortened and therefore an energy loss generated in the system is suppressed.

REFERENCES:
patent: 4214198 (1980-07-01), Schneider
patent: 4692684 (1987-09-01), Schaeffer
patent: 4868480 (1989-09-01), van der Linde
patent: 4992672 (1991-02-01), Norton

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