Power source device

• US 8,692,512 B2
• Filed: 09/20/2011
• Issued: 04/08/2014
• Est. Priority Date: 09/22/2010
• Status: Expired due to Fees

• Current Assignee: Kabushiki Kaisha Toyota Jidoshokki
• Original Assignee: Kabushiki Kaisha Toyota Jidoshokki
• Inventors: Kachi, Tadayoshi, Tanikawa, Tomoharu, Sakakibara, Norihisa
• Primary Examiner(s): TSO, EDWARD H
• Application Number:
  US13/237,629
• Publication Number:
  US 20120068663A1
• Time in Patent Office: 931 Days
• Field of Search: 320/104, 320/107, 320/109, 320/116, 320/119, 320/126, 320/137
• US Class Current: 320/109
• CPC Class Codes: B60L 2210/12 Buck converters
• CPC Class Codes: B60L 2210/14 Boost converters
• CPC Class Codes: B60L 2210/30 AC to DC converters
• CPC Class Codes: B60L 53/14 Conductive energy transfer
• CPC Class Codes: B60L 53/22 Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
• CPC Class Codes: B60L 58/20 having different nominal voltages
• CPC Class Codes: H02J 1/08 Three-wire systems; Systems having more than three wires
• CPC Class Codes: H02J 1/082 Plural DC voltage, e.g. DC supply voltage with at least two different DC voltage levels
• CPC Class Codes: H02J 7/0013 acting upon several batteries simultaneously or sequentially H02J7/1423 takes precedence
• CPC Class Codes: H02M 1/007 Plural converter units in cascade push-pull DC/DC converters with pre-regulator H02M3/3374; DC-AC converters following a DC-DC stage including a high frequency transformer H02M7/4807; DC-AC converters following a DC-DC conversion stage generating periodically varying voltages H02M7/4826
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 10/72 Electric energy management in electromobility
• CPC Class Codes: Y02T 10/92 Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles
• CPC Class Codes: Y02T 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles

Abstract

A power control device for a vehicle includes a first battery, a second battery, the voltage of which is lower than the voltage of the first battery, and a transformer. The transformer includes a primary coil, to which an alternating-current power source is connected, a first secondary coil, to which the first battery is connected, and at least one second secondary coil, to which the second battery is connected. A rectification circuit is located between the second secondary coil and the second battery. A voltage adjustment circuit is located between the rectification circuit and the second battery. A control section charges the first battery using the alternating current power source, and, simultaneously supplies electrical power to the second battery.

Claims

1. A power source device comprising:

at least one first battery;

at least one second battery, the voltage of which is lower than that of the first battery;

a transformer having a primary coil, to which an alternating-current power source is connected, at least one first secondary coil, to which the first battery is connected, and at least one second secondary coil, to which the second battery is connected;

a first power conversion circuit located between the primary coil of the transformer and the alternating-current power source;

a second power conversion circuit located between the primary coil of the transformer and the first power conversion circuit;

a third power conversion circuit located between the first secondary coil and the first battery;

a rectification circuit located between the second secondary coil and the second battery;

a voltage adjustment circuit located between the rectification circuit and the second battery; and

a control section that charges the first battery using the alternating-current power source, and, simultaneously supplies electrical power to the second battery.

2. The power source device according to claim 1, wherein

the control section includes a first control section, and

the first control section charges the first battery using the alternating-current power source by, on a side of the primary coil, controlling the first power conversion circuit and the second power conversion circuit while implementing a feedback of the output to the first battery, and by, on a side of the first secondary coil, controlling the third power conversion circuit, and simultaneously, the first control section supplies, on the side of the second secondary coil, electrical power to the second battery from the alternating-current power source, while adjusting the output voltage of the second battery by the voltage adjustment circuit.

3. The power source device according to claim 1, wherein

the control section includes a second control section, and

the second control section supplies electrical power to the second battery from the first battery by, on the side of the first secondary coil, controlling the third power conversion circuit while implementing a feedback of the output to the second battery.

4. The power source device according to claim 1, wherein

the control section includes a third control section, and

the third control section outputs alternating current to the side of the alternating-current power source from the first battery, and, simultaneously supplies electrical power to the second battery.

5. The power source device according to claim 4, wherein

the control section includes a fourth control section, and

the fourth control section generates, on the side of the primary coil of the transformer, alternating current using the second power conversion circuit and the first power conversion circuit by controlling the third power conversion circuit while implementing a feedback of the output from the alternating-current power source, and outputs alternating-current voltage to the side of the alternating-current power source from the first battery, and simultaneously, the fourth control section supplies, on the side of the second secondary coil, electrical power to the second battery.

6. The power source device according to claim 5, wherein the control section further includes a fifth control section that implements a feedback of the output to the second battery.

7. The power source device according to claim 1, wherein the power source device is designed for being mounted on a vehicle.

8. The power source device according to claim 7, wherein the second battery is a complementary battery.

9. A power source device for a vehicle, the device comprising:

at least one first battery;

at least one second battery, the voltage of which is lower than that of the first battery, wherein a device that is activated at least during charging is connected to the second battery;

a control circuit connected to the first battery via a line, the control circuit controlling a load;

a system main relay provided on the line; and

a charger connected to a part of the line between the system main relay and the first battery, the charger being capable of charging the first battery using an external alternating-current power source,

wherein the charger includes;

a transformer having a primary coil, to which an alternating-current power source is connected, at least one first secondary coil, to which the first battery is connected, and at least one second secondary coil, to which the second battery is connected;

a first power conversion circuit located between the primary coil of the transformer and the alternating-current power source;

a second power conversion circuit located between the primary coil of the transformer and the first power conversion circuit;

a third power conversion circuit located between the first secondary coil and the first battery;

a rectification circuit located between the second secondary coil and the second battery;

a voltage adjustment circuit located between the rectification circuit and the second battery; and

a control section that charges, in a state where the system main relay is open, the first battery using the alternating-current power source, and, simultaneously supplies electrical power to the second battery.

10. The power source device for a vehicle according to claim 9, wherein

the control section includes a first control section, and

the first control section charges the first battery using the alternating-current power source by, on the side of the primary coil, controlling the first power conversion circuit and the second power conversion circuit while implementing a feedback of the output to the first battery, and by, on a side of the first secondary coil, controlling the third power conversion circuit, and simultaneously, the first control section supplies, on the side of the second secondary coil, electrical power to the second battery from the alternating-current power source, while adjusting the output voltage of the second battery by the voltage adjustment circuit.

11. The power source device for a vehicle according to claim 9, wherein

the control section includes a second control section, and

the second control section supplies electrical power to the second battery from the first battery by, on the side of the first secondary coil, controlling the third power conversion circuit while implementing a feedback of the output to the second battery.

12. The power source device for a vehicle according to claim 9, wherein

the control section includes a third control section, and

the third control section outputs alternating current to the side of the alternating-current power source from the first battery, and, simultaneously supplies electrical power to the second battery.

13. The power source device for a vehicle according to claim 12, wherein

the control section includes a fourth control section, and

the fourth control section generates, on the side of the primary coil of the transformer, alternating current using the second power conversion circuit and the first power conversion circuit by controlling the third power conversion circuit while implementing a feedback of the output from the alternating-current power source, and outputs alternating-current voltage to the side of the alternating-current power source from the first battery, and simultaneously, the fourth control section supplies, on the side of the second secondary coil, electrical power to the second battery.

14. The power source device for a vehicle according to claim 13, wherein the control section further includes a fifth control section that implements a feedback of the output to the second battery.