POWER SOURCE DEVICE

• US 20170117731A1
• Filed: 03/16/2015
• Published: 04/27/2017
• Est. Priority Date: 04/23/2014
• Status: Active Grant

• Current Assignee: Hitachi Astemo Ltd. (Hitachi, Ltd.)
• Original Assignee: Hitachi Automotive Systems Limited (Hitachi, Ltd.)
• Inventors: SHIMADA, Takae, SHOJI, Hiroyuki, OOUCHI, Takayuki, SATO, Fumihiro, KUBO, Kenji, KISHIMOTO, Eigo
• Granted Patent: US 10,461,553 B2
• Time in Patent Office: Days
• CPC Class Codes: B60L 2210/10 DC to DC converters
• CPC Class Codes: B60L 2210/30 AC to DC converters
• CPC Class Codes: B60L 53/22 Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
• CPC Class Codes: B60Y 2200/91 Electric vehicles
• CPC Class Codes: B60Y 2400/112 Batteries
• CPC Class Codes: H02J 1/102 being switching converters H02J1/108, H02J1/12 take precedence
• CPC Class Codes: H02J 2207/20 Charging or discharging characterised by the power electronics converter
• CPC Class Codes: H02J 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• CPC Class Codes: H02J 7/02 for charging batteries from ac mains by converters
• 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: H02M 1/008 Plural converter units for generating at two or more independent and non-parallel outputs, e.g. systems with plural point of load switching regulators
• CPC Class Codes: H02M 3/155 using semiconductor devices only
• CPC Class Codes: H02M 3/158 including plural semiconductor devices as final control devices for a single load
• CPC Class Codes: H02M 3/28 using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
• CPC Class Codes: H02M 3/335 using semiconductor devices only
• CPC Class Codes: H02M 3/33507 with automatic control of the output voltage or current, e.g. flyback converters H02M3/33561, H02M3/33569 take precedence
• CPC Class Codes: H02M 7/12 using discharge tubes with control electrode or semiconductor devices with control electrode
• CPC Class Codes: H02M 7/217 using semiconductor devices only
• CPC Class Codes: H02M 7/219 in a bridge configuration
• 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

Provided is a power source device having a high efficiency. A power source device 1 includes an insulated AC-DC converter 2 which receives a voltage of an AC power source 10 and outputs a link voltage Vlink, a bidirectional DC-DC converter 3 which receives the link voltage Vlink to charge a main battery 5, an insulated DC-DC converter 4 which receives the link voltage Vlink to supply power to a load 7, an operation mode in which the power is supplied from the AC power source 10 to the main battery 5, and an operation mode in which the power is supplied from the main battery 5 to the load 7.

Claims

1. A power source device, comprising:

an insulated AC-DC converter that receives an AC voltage and outputs a DC link voltage; and

a bidirectional DC-DC converter that receives the link voltage to charge a battery, and receives the charged power to output the link voltage.

2. The power source device according to claim 1,

wherein the power is supplied from the link voltage.

3. The power source device according to claim 1, further comprising:

an insulated DC-DC converter that receives the link voltage to supply the power to a load.

4. The power source device according to claim 3, further comprising:

a first operation mode in which the power is supplied from the AC voltage to the battery; and

a second operation mode in which the power is supplied from the battery to the load.

5. The power source device according to claim 4, further comprising:

a third operation mode in which the power is supplied from the AC voltage to the battery and the load.

6. The power source device according to claim 1,

wherein a voltage range of the battery is wider than an operation range of the link voltage in a case where the bidirectional DC-DC converter steadily receives or outputs the power.

7. The power source device according to claim 1,

wherein the bidirectional DC-DC converter includes an operation in which the link voltage is connected between first terminals, the battery is connected between second terminals, and at least a switching element of the bidirectional DC-DC converter enters an ON state to short-circuit the first terminals and the second terminals in a galvanic manner.

8. The power source device according to claim 7,

wherein the bidirectional DC-DC converter includes a first switching element and a second switching element that are connected in series between the first terminals, and a smoothing inductor and a smoothing capacitor that are connected in series between both ends of the second switching element, and

wherein both ends of the smoothing capacitor are used as the second terminals.

9. The power source device according to claim 7,

wherein the bidirectional DC-DC converter includes a smoothing inductor and a first switching element that are connected in series between the first terminals, and a second switching element and a smoothing capacitor that are connected in series between both ends of the first switching element, and

wherein both ends of the smoothing capacitor are used as the second terminals.

10. The power source device according to claim 7,

wherein the bidirectional DC-DC converter includes a first switching element and a second switching element that are connected in series between the first terminals, a smoothing inductor and a third switching element that are connected in series between both ends of the second switching element, and a fourth switching element and a smoothing capacitor that are connected in series between both ends of the third switching element, and

wherein both ends of the smoothing capacitor are used as the second terminals.

11. The power source device according to claim 1,

wherein the insulated AC-DC converter includes an AC-DC circuit that receives the AC voltage and outputs a DC voltage, and a DC-DC circuit that receives the DC voltage output by the AC-DC circuit and outputs the link voltage, and

wherein the DC-DC circuit has a function of insulating an input and an output of the DC-DC circuit.

12. The power source device according to claim 11,

wherein the DC-DC circuit is a resonance converter including

a switching circuit that receives the DC voltage output by the AC-DC circuit and outputs a rectangular voltage to cause a current to flow in a primary winding,

a rectification circuit that receives and rectifies a current of a secondary winding and outputs the link voltage,

a transformer that magnetically combines the primary winding and the secondary winding, and

a resonance capacitor and a resonance inductor that are connected in series to the primary winding and/or the secondary winding.

13. A power source device, comprising:

an insulated AC-DC converter that receives an AC voltage and outputs a DC link voltage;

a bidirectional DC-DC converter that receives the link voltage to charge a battery, and receives the charged power to output the link voltage; and

an insulated DC-DC converter that receives the link voltage to supply the power to a load,

wherein an operation range of the link voltage in a case where the bidirectional DC-DC converter steadily receives or outputs the power is narrower than a voltage range of the battery.

14. The power source device according to claim 13, further comprising:

a first operation mode in which the power is supplied from the AC voltage to the battery; and

a second operation mode in which the power is supplied from the battery to the load.

15. The power source device according to claim 14, further comprising:

a third operation mode in which the power is supplied from the AC voltage to the battery and the load.

16. The power source device according to claim 14,

wherein the bidirectional DC-DC converter includes an operation in which the link voltage is connected between first terminals, the battery is connected between second terminals, and at least a switching element of the bidirectional DC-DC converter enters an ON state to short-circuit the first terminals and the second terminals in a galvanic manner.

17. The power source device according to claim 16,

wherein the bidirectional DC-DC converter includes a first switching element and a second switching element that are connected in series between the first terminals, and a smoothing inductor and a smoothing capacitor that are connected in series between both ends of the second switching element, and

wherein both ends of the smoothing capacitor are used as the second terminals.

18. The power source device according to claim 16,

wherein the bidirectional DC-DC converter includes a smoothing inductor and a first switching element that are connected in series between the first terminals, and a second switching element and a smoothing capacitor that are connected in series between both ends of the first switching element, and

wherein both ends of the smoothing capacitor are used as the second terminals.

19. The power source device according to claim 16,

wherein the bidirectional DC-DC converter includes a first switching element and a second switching element that are connected in series between the first terminals, a smoothing inductor and a third switching element that are connected in series between both ends of the second switching element, and a fourth switching element and a smoothing capacitor that are connected in series between both ends of the third switching element, and

wherein both ends of the smoothing capacitor are used as the second terminals.