Car power source apparatus and vehicle equipped with the power source apparatus
First Claim
1. A car power source apparatus comprising:
- a driving battery having a plurality of batteries connected in series to supply power to a vehicle driving motor;
battery-switches that connect the driving battery to a vehicle-side load;
a control circuit that controls the battery-switches;
an auxiliary battery that supplies operating power to the control circuit power supply line, anda supplementary power supply circuit that supplies operating power to the control circuit power supply line from a segment of the batteries of the driving battery and that maintains control circuit operation if supply voltage drops in the auxiliary battery power supplied to the control circuit power supply line,wherein the supplementary power supply circuit supplies operating power to the control circuit power supply line at the control circuit operating voltage from one segment of the batteries of the driving battery, such that in an auxiliary battery voltage drop condition, control circuit operation is maintained to maintain control of the battery-switches,wherein the supplementary power supply circuit includes supplementary power switches that are switched ON in an auxiliary battery voltage drop condition, a voltage detection circuit that detects the voltage on the control circuit power supply line or the voltage of the auxiliary battery, and a decision circuit that judges a voltage drop condition when the voltage detected by the voltage detection circuit is below a first set voltage, and judges normal conditions when the detected voltage is above a second set voltage,wherein in the voltage drop condition, the decision circuit switches ON the supplementary power switches to supply operating power from one segment of the driving battery to the control circuit power supply line, andwherein under normal conditions, the decision circuit switches the supplementary power switches to the OFF state to supply operating power from the auxiliary battery to the control circuit power supply line.
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Accused Products
Abstract
The car power source apparatus is provided with a driving battery having a plurality of connected batteries, battery-switches that connect the driving battery to the vehicle-side load, a control circuit that controls the battery-switches, and an auxiliary battery that supplies operating power to the control circuit power supply line. The power source apparatus is provided with a supplementary power supply circuit that supplies operating power to the control circuit power supply line from batteries in the driving battery to maintain control circuit operation in the event of an auxiliary battery voltage drop condition. In an auxiliary battery voltage drop condition, the supplementary power supply circuit supplies operating power to the control circuit power supply line and maintains control circuit operation to maintain control of the battery-switches.
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Citations
17 Claims
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1. A car power source apparatus comprising:
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a driving battery having a plurality of batteries connected in series to supply power to a vehicle driving motor; battery-switches that connect the driving battery to a vehicle-side load; a control circuit that controls the battery-switches; an auxiliary battery that supplies operating power to the control circuit power supply line, and a supplementary power supply circuit that supplies operating power to the control circuit power supply line from a segment of the batteries of the driving battery and that maintains control circuit operation if supply voltage drops in the auxiliary battery power supplied to the control circuit power supply line, wherein the supplementary power supply circuit supplies operating power to the control circuit power supply line at the control circuit operating voltage from one segment of the batteries of the driving battery, such that in an auxiliary battery voltage drop condition, control circuit operation is maintained to maintain control of the battery-switches, wherein the supplementary power supply circuit includes supplementary power switches that are switched ON in an auxiliary battery voltage drop condition, a voltage detection circuit that detects the voltage on the control circuit power supply line or the voltage of the auxiliary battery, and a decision circuit that judges a voltage drop condition when the voltage detected by the voltage detection circuit is below a first set voltage, and judges normal conditions when the detected voltage is above a second set voltage, wherein in the voltage drop condition, the decision circuit switches ON the supplementary power switches to supply operating power from one segment of the driving battery to the control circuit power supply line, and wherein under normal conditions, the decision circuit switches the supplementary power switches to the OFF state to supply operating power from the auxiliary battery to the control circuit power supply line. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A car power source apparatus comprising:
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a driving battery having a plurality of batteries connected in series to supply power to a vehicle driving motor; battery-switches that connect the driving battery to a vehicle-side load; a control circuit that controls the battery-switches; an auxiliary battery that supplies operating power to the control circuit power supply line, and a supplementary power supply circuit that supplies operating power to the control circuit power supply line from a segment of the batteries of the driving battery and that maintains control circuit operation if supply voltage drops in the auxiliary battery power supplied to the control circuit power supply line, wherein the supplementary power supply circuit supplies operating power to the control circuit power supply line at the control circuit operating voltage from one segment of the batteries of the driving battery, such that in an auxiliary battery voltage drop condition, control circuit operation is maintained to maintain control of the battery-switches, wherein the specified supply voltage of the supplementary power supply circuit is lower than the specified voltage of the auxiliary battery, and wherein the supplementary power supply circuit supplies power to the control circuit power supply line from one segment of batteries in the driving battery through a first diode; and
the auxiliary battery supplies operating power to the control circuit power supply line through a second diode. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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Specification