Circuit for constant voltage power source
Patent
·
OSTI ID:5852795
This specification discloses a circuit for a constant voltage power source. The circuit includes a vehicle charging means, such as an alternator, which charges a main battery designed for operating main vehicle electrical loads such as a starter motor and a secondary battery, designed for operating secondary vehicle electrical loads such as electronic components particularly sensitive to voltage variations and typically requiring a constant voltage input for operation. A resistor in series with the vehicle charging means and the secondary battery limits the rate of charging of the secondary battery. The main vehicle loads can be selectively connected to the circuit for operation by the vehicle charging means and/or the main battery. A diode in series with the secondary battery prevents the secondary battery from discharging through any path but the secondary vehicle loads. The secondary vehicle loads are connected across the secondary battery but can also receive current from any of the main battery , secondary battery and the vehicle charging means. When sufficient current and voltage is not available for the secondary vehicle loads from the main battery and the vehicle charging system, such as during cold cranking of the starter motor, the needed power can be supplied from the secondary battery. This is particularly advantageous because the secondary vehicle loads can include electronic circuits necessary for proper ignition of the vehicle engine.
- Assignee:
- Ford Motor Co
- Patent Number(s):
- US 4207511
- OSTI ID:
- 5852795
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
25 ENERGY STORAGE
250903* -- Energy Storage-- Batteries-- Materials
Components
& Auxiliaries
ALTERNATORS
BATTERY CHARGING
CONTROL SYSTEMS
ELECTRIC BATTERIES
ELECTRIC GENERATORS
ELECTRIC POTENTIAL
ELECTRICAL EQUIPMENT
ELECTROCHEMICAL CELLS
ELECTRONIC CIRCUITS
EQUIPMENT
RESISTORS
SEMICONDUCTOR DEVICES
SEMICONDUCTOR DIODES
STABILIZATION
VEHICLES
250903* -- Energy Storage-- Batteries-- Materials
Components
& Auxiliaries
ALTERNATORS
BATTERY CHARGING
CONTROL SYSTEMS
ELECTRIC BATTERIES
ELECTRIC GENERATORS
ELECTRIC POTENTIAL
ELECTRICAL EQUIPMENT
ELECTROCHEMICAL CELLS
ELECTRONIC CIRCUITS
EQUIPMENT
RESISTORS
SEMICONDUCTOR DEVICES
SEMICONDUCTOR DIODES
STABILIZATION
VEHICLES