Control device of power supply circuit
First Claim
1. A control device for a plurality of power supply circuits composed of power storage mechanisms and a plurality of relays, each of said power supply circuits including a circuit that has a first relay controlling electric conduction/non-conduction between a load and one electrode of the power storage mechanism and a resistor connected in series to said first relay, a second relay connected in parallel to said circuit, and a third relay controlling electric conduction/non-conduction between the load and another electrode of the power storage mechanism,said control device comprising:
- a voltage detection unit detecting a voltage value of said load;
a voltage detection unit detecting a voltage value of each of said power storage mechanisms;
a processing unit performing a precharge process upon power supply startup, the precharge process being performed by causing a conductive state of said first relay and said third relay before causing the conductive state of said second relay and said third relay in each of said power supply circuits; and
a detection unit detecting, before performing said precharge process, based on a voltage value of the load detected when outputting conduction command to the relay on one electrode of the power storage mechanism in each of said power supply circuits, welding of the relay on another electrode in any of said plurality of power supply circuits, and identifying the power supply circuit in which the relay on said another electrode is welded, based on a voltage value of each of the power storage mechanisms detected when outputting said conduction command.
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Accused Products
Abstract
An ECU executes a program including a step of turning on an SMRP and an A-SMRP if an ignition switch is turned on; a step of detecting voltage values VB(1) and VB(2) of running batteries when VH is detected and if VH is higher than 180 V; a step of detecting that SMRP connected to the running battery is welded, if VB(1) is higher than 150 V; and a step of detecting that A-SMRB connected to the running battery is welded, if VB(2) is higher than 150 V.
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Citations
22 Claims
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1. A control device for a plurality of power supply circuits composed of power storage mechanisms and a plurality of relays, each of said power supply circuits including a circuit that has a first relay controlling electric conduction/non-conduction between a load and one electrode of the power storage mechanism and a resistor connected in series to said first relay, a second relay connected in parallel to said circuit, and a third relay controlling electric conduction/non-conduction between the load and another electrode of the power storage mechanism,
said control device comprising: -
a voltage detection unit detecting a voltage value of said load; a voltage detection unit detecting a voltage value of each of said power storage mechanisms; a processing unit performing a precharge process upon power supply startup, the precharge process being performed by causing a conductive state of said first relay and said third relay before causing the conductive state of said second relay and said third relay in each of said power supply circuits; and a detection unit detecting, before performing said precharge process, based on a voltage value of the load detected when outputting conduction command to the relay on one electrode of the power storage mechanism in each of said power supply circuits, welding of the relay on another electrode in any of said plurality of power supply circuits, and identifying the power supply circuit in which the relay on said another electrode is welded, based on a voltage value of each of the power storage mechanisms detected when outputting said conduction command. - View Dependent Claims (2, 3, 4, 5)
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6. A control device for a plurality of power supply circuits composed of power storage mechanisms and a plurality of relays, each of said power supply circuits including a circuit that has a first relay controlling electric conduction/non-conduction between a load and one electrode of the power storage mechanism and a resistor connected in series to said first relay, a second relay connected in parallel to said circuit, and a third relay controlling electric conduction/non-conduction between the load and another electrode of the power storage mechanism,
said control device comprising: -
a voltage detection unit detecting a voltage value of said load; a voltage detection unit detecting a voltage value of each of said power storage mechanisms; a processing unit performing a precharge process upon power supply startup, the precharge process being performed by causing a conductive state of said first relay and said third relay before causing the conductive state of said second relay and said third relay in each of said power supply circuits; and a detection unit detecting immobility of any of said first relay and said third relay in any of said plurality of power supply circuits based on a voltage value of the load detected during said precharge process, and identifying the power supply circuit in which any of said first relay and said third relay is immobile, based on a voltage value of each of the power storage mechanisms detected during said precharge process. - View Dependent Claims (7, 8, 9)
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10. A control device for a plurality of power supply circuits composed of power storage mechanisms and a plurality of relays, each of said power supply circuits including a circuit that has a first relay controlling electric conduction/non-conduction between a load and one electrode of the power storage mechanism and a resistor connected in series to said first relay, a second relay connected in parallel to said circuit, and a third relay controlling electric conduction/non-conduction between the load and another electrode of the power storage mechanism,
said control device comprising: -
a voltage detection unit detecting a voltage value of said load; a current detection unit detecting a current value of each of said power storage mechanisms; a processing unit performing a precharge process upon power supply startup, the precharge process being performed by causing a conductive state of said first relay and said third relay before causing the conductive state of said second relay and said third relay in each of said power supply circuits; and a detection unit detecting, upon shutdown of power supply, based on drop of the voltage value of the load and detected when outputting a non-conduction command to the relay on one electrode of the power storage mechanism in each of said power supply circuits, welding of the relay on said one electrode in any of said plurality of power supply circuits, and identifying the power supply circuit in which the relay on said one electrode is welded, based on a current value of each of the power storage mechanisms detected when outputting said non-conduction command. - View Dependent Claims (11, 12, 13, 14)
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15. A control device for a plurality of power supply circuits including power storage mechanisms and a plurality of relays, each of said power supply circuits including a circuit that has a first relay controlling electric conduction/non-conduction between a load and one electrode of the power storage mechanism and a resistor connected in series to said first relay, a second relay connected in parallel to said circuit, and a third relay controlling electric conduction/non-conduction between the load and another electrode of the power storage mechanism,
said control device comprising: -
a voltage detection unit detecting a voltage value of said load; a processing unit performing a precharge process, upon power supply startup, by causing a conductive state of said first relay and said third relay before causing the conductive state of said second relay and said third relay in each of said power supply circuits, so that a capacitor provided in parallel to said load and being an object of the precharge process is charged up to a charging level in such a level that a failure does not occur in said power supply circuit when electric power is supplied not through said resistor, and that the charging level is lower than full charging; a full-charge processing unit fully charging said capacitor, after performing said precharge process, with the charging rate of the capacitor from said charging rate lower than full charging to full charging divided, by sequentially using said second relay and said third relay in each of said power supply circuits; and a detection unit detecting immobility of any of said second relay and said third relay in each of said plurality of power supply circuits, before said capacitor is fully charged, based on at least one of the detected voltage value of the load and the charging rate of the capacitor. - View Dependent Claims (16, 17, 18)
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19. A control device for a plurality of power supply circuits including power storage mechanisms and a plurality of relays, each of said power supply circuits including a circuit that has a first relay controlling electric conduction/non-conduction between a load and one electrode of the power storage mechanism and a resistor connected in series to said first relay, a second relay connected in parallel to said circuit, and a third relay controlling electric conduction/non-conduction between the load and another electrode of the power storage mechanism,
said control device comprising: -
a voltage detection unit detecting a voltage value of said load; a precharge processing unit performing a precharge process, upon power supply startup, with a charging rate of a capacitor divided, the capacitor provided in parallel to said load and being an object of the precharge process, by sequentially using each of said power supply circuits, the precharge process being performed by causing a conductive state of said first relay and said third relay before causing the conductive state of said second relay and said third relay in each of said power supply circuits; and a detection unit detecting immobility of any of said first relay and said third relay in each of said plurality of power supply circuits, based on at least one of the detected voltage value of the load and the charging rate of the capacitor during said precharge process performed with division. - View Dependent Claims (20, 21, 22)
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Specification