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A dual voltage, dual battery electrical supply system for automotive vehicles is disclosed. Two batteries are connected in series and a high voltage regulator regulates the voltage across the series connected batteries and a low voltage regulator regulates the voltage across the lower battery of the

A dual voltage, dual battery electrical supply system for automotive vehicles is disclosed. Two batteries are connected in series and a high voltage regulator regulates the voltage across the series connected batteries and a low voltage regulator regulates the voltage across the lower battery of the series connection. Overvoltage protection is provided for the lower battery by a control circuit which resets the high voltage regulator to a reduced voltage in response to a predetermined voltage across the lower battery.

대표청구항 ▼

An electrical system for a vehicle, said system comprising: a DC generator having an output, first and second storage batteries each having a rated voltage connected in series with each other and adapted to be charged from the generator, a first load circuit including the first battery and a first l

An electrical system for a vehicle, said system comprising: a DC generator having an output, first and second storage batteries each having a rated voltage connected in series with each other and adapted to be charged from the generator, a first load circuit including the first battery and a first load device in parallel and adapted to be powered by electricity at a voltage in a first voltage range corresponding to the rated voltage of the first battery, a second load circuit including the first and second batteries in series with each other and a second load device in parallel with the series connection of said batteries and adapted to be powered by electricity at a voltage in a second voltage range corresponding to the sum of the rated voltages of said batteries, a first regulating means for regulating the voltage across said first load circuit, a second regulating means for regulating the voltage across said second load circuit, and control means responsive to an increase in the voltage across said first load circuit to a value above said first voltage range for causing the second regulating means to decrease the voltage across said second load circuit.