Dual voltage motor vehicle electrical system
A dual voltage motor vehicle electrical system comprising series connected cranking and accessory batteries that are used to energize an electric vehicle engine cranking motor. The accessory battery is charged by a vehicle engine driven generator and the cranking battery is charged by a battery charging circuit having an input connected to the accessory battery and an output connected to the cranking battery. The battery charging circuit is maintained in operation for a period of time after shut down of the engine to charge the cranking battery from the accessory battery. The battery charging circuit includes an inductance coil for transferring energy between the accessory and cranking batteries which may take the form of an actuating coil of a magnetic switch the contacts of which disconnect the accessory battery from an electrical load when the actuating coil is deenergized.
- Assignee:
- General Motors Corporation
- Patent Number(s):
- US 4492912
- OSTI ID:
- 5760851
- Resource Relation:
- Patent File Date: Filed date 12 Jan 1983; Other Information: PAT-APPL-457495
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
33 ADVANCED PROPULSION SYSTEMS
ELECTRIC-POWERED VEHICLES
ELECTRIC BATTERIES
ELECTRIC MOTORS
ACTUATORS
AUXILIARY SYSTEMS
BATTERY CHARGING
ELECTRIC COILS
ELECTRIC CONTACTS
ELECTRONIC CIRCUITS
SWITCHING CIRCUITS
ELECTRICAL EQUIPMENT
ELECTROCHEMICAL CELLS
EQUIPMENT
MOTORS
VEHICLES
250901* - Energy Storage- Batteries- Design & Development
330300 - Advanced Propulsion Systems- Electric-Powered Systems