초록 ▼

Dual batteries having a CRAnking battery and an AUXiliary battery require a switch to the alternator and to disconnect the auxiliaries before the battery becomes depleted. The switch measures the AUXiliary battery's state of charge during alternator charging. The switch opens to prevent overcharging

Dual batteries having a CRAnking battery and an AUXiliary battery require a switch to the alternator and to disconnect the auxiliaries before the battery becomes depleted. The switch measures the AUXiliary battery's state of charge during alternator charging. The switch opens to prevent overcharging and to preserve the CRAnking battery charge while allowing the AUXiliary battery to discharge preferentially. The switch instructs the alternator to select a burst, float or top up charging voltage depending on the AUXiliary battery state of charge. The switch uses microprocessor control. This utilizes tables to interpret circuit values. A 3-axis graph relates discharge current and voltage with state of charge.

대표청구항 ▼

[ I claim:] [1.] In a vehicle having a starter motor, a battery charging generator, and a 2, 3, or 4-pole battery with a CRA battery and an AUX battery, a normally open switch connecting the CRA and AUX batteries, the switch being in closed position during battery charging, the switch having a senso

[ I claim:] [1.] In a vehicle having a starter motor, a battery charging generator, and a 2, 3, or 4-pole battery with a CRA battery and an AUX battery, a normally open switch connecting the CRA and AUX batteries, the switch being in closed position during battery charging, the switch having a sensor which detects the state of charge of the AUX battery at least during charging to prevent overcharging one of the CRA and AUX batteries by actuating the switch to disconnect the AUX battery from the CRA battery, and to allow the AUX battery to discharge preferentially while preserving the state of charge of the CRA battery sufficiently to start the vehicle.