Power supply system

Abstract

To provide a power supply system that can reduce power consumption and improve safety.SOLUTION: A power supply system 1A includes: a first power source device 10 including a first power conversion unit 11 that performs charging and discharging operations for an electric vehicle 40, a first control unit 12 that controls the charging and discharging operations, and a first control power source unit 13 that generates power source voltage for the first control unit 12; and a second power source device 20 including a second power conversion unit 21 and a second control unit 22. The power supply system further includes a starting device 30A. The starting device 30A transmits a starting signal to the second control unit 22. Upon receiving the starting signal, the second control unit 22 causes the second power conversion unit 21 to supply power source power to the first control power source unit 13. The first control power source unit 13 generates power source voltage based on the power source power.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a power supply system.

Background Art

[0002] As a conventional power supply system, for example, the one described in Patent Document 1 is known. The power supply system described in Patent Document 1 includes a V2H (Vehicle to Home) stand as a charging / discharging device and a power conditioner device for solar power generation.

[0003] The charging / discharging device includes a power conversion unit that performs a charging / discharging operation on an electric vehicle, a control unit that controls the charging / discharging operation of the power conversion unit, and a control power supply unit that generates the power supply voltage of the control unit. The control power supply unit operates with the high-voltage DC power supply power supplied from the power conditioner device.

[0004] Since the high-voltage DC power supply power is supplied even when the charging / discharging device is not performing a charging / discharging operation, power consumption is always generated in the charging / discharging device. Also, since the high-voltage DC power supply power is always supplied, if an electric vehicle accidentally collides with the charging / discharging device, a dangerous state (for example, electric shock or fire) may occur in some cases.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] The present invention has been made in view of the above circumstances, and an object thereof is to provide a power supply system capable of reducing power consumption and improving safety.

Means for Solving the Problems

[0007] In order to solve the above problems, a power supply system according to the present invention includes a first power supply device including a first power conversion unit that performs a charge / discharge operation on an electric vehicle, a first control unit that controls the charge / discharge operation of the first power conversion unit, and a first control power supply unit that generates a power supply voltage of the first control unit, a second power supply device including a second power conversion unit and a second control unit that controls the second power conversion unit, A power supply system including further includes a starting device, the starting device transmits a start signal to the second control unit, when the second control unit receives the start signal, it causes the second power conversion unit to supply power to the first control power supply unit, the first control power supply unit generates the power supply voltage based on the power.

[0008] According to this configuration, when the second control unit receives the start signal, it causes the second power conversion unit to supply power to the first control power supply unit. Therefore, before receiving the start signal, the first power supply device can be set to a complete stop state, and the power consumption of the first power supply device can be reduced to zero. Also, before receiving the start signal, since power is not supplied from the second power conversion unit to the first control power supply unit, for example, when an electric vehicle collides with the first power supply device, a dangerous state (such as electric shock or fire) can be avoided.

[0009] In the power supply system, the first power supply device includes a first input / output terminal connected to the second power supply device, and first opening / closing means interposed in a first power line connecting the first input / output terminal and the first power conversion unit, the second power supply device includes a second input / output terminal connected to the first input / output terminal, and second opening / closing means interposed in a second power line connecting the second input / output terminal and the second power conversion unit. After the charge / discharge operation by the first power conversion unit ends, the second control unit can be configured to open the second switching means and stop the supply of the power source power from the second power conversion unit to the first control power source unit.

[0010] In the power supply system, The first control power source unit is connected between the first input / output terminal and the first switching means on the first power line, After the charge / discharge operation by the first power conversion unit ends, the first control unit can be configured to open the first switching means.

[0011] In the power supply system, The starting device may be provided in the first power supply device.

[0012] In the power supply system, The starting device may be a mobile terminal.

Advantages of the Invention

[0013] According to the present invention, it is possible to provide a power supply system capable of reducing power consumption and improving safety.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Modes for Carrying Out the Invention

[0015] Hereinafter, embodiments of the power supply system according to the present invention will be described with reference to the accompanying drawings.

[0016] [First Embodiment] Figure 1 shows a power supply system 1A according to the first embodiment of the present invention. The power supply system 1A includes a charge / discharge device 10 (corresponding to the "first power supply device" of the present invention) and a power conditioner device 20 (corresponding to the "second power supply device" of the present invention).

[0017] In this embodiment, the charge / discharge device 10 is a V2H (Vehicle to Home) stand installed outdoors. The charge / discharge device 10 includes terminals T1, T2, a charge / discharge connector (not shown), a first power conversion unit 11, a first control unit 12, a first control power supply unit 13, an operation panel 14, relays RL1, RL2, and a starting device 30A.

[0018] The terminal T1 is connected to an electric vehicle (EV) 40 such as an electric car or a plug-in hybrid vehicle via a charge / discharge connector (for example, a charge / discharge connector compliant with the CHAdeMO standard). The terminal T2 corresponds to the "first input / output terminal" of the present invention and is connected to the power conditioner device 20. Note that the connection between the electric vehicle 40 and the terminal T1 may be a non-contact (wireless) connection.

[0019] The first power conversion unit 11 includes a bidirectional DC / DC converter circuit and is configured to perform charge / discharge operations (charging operation and discharging operation) on the in-vehicle battery of the electric vehicle 40. The bidirectional DC / DC converter circuit includes, for example, a plurality of switching elements and performs boost operation and buck operation.

[0020] The first control unit 12 is configured to control the charge / discharge operation of the first power conversion unit 11 and the opening / closing operation of the relays RL1, RL2, and to communicate with the power conditioner device 20 and the electric vehicle 40 mutually. The first control unit 12 is composed of an analog control circuit, a digital control circuit using a microcontroller or the like, or a circuit combining an analog control circuit and a digital control circuit. Also, the first control unit 12 operates when a power supply voltage is supplied from the first control power supply unit 13, while it stops and does not consume power when the power supply voltage is not supplied.

[0021] The first control power supply unit 13 is configured to generate the power supply voltage of the first control unit 12. Specifically, the first control power supply unit 13 generates the power supply voltage of the first control unit 12 based on the high-voltage DC power supply power (corresponding to the "power supply power" of the present invention) supplied from the power conditioner device 20.

[0022] The operation panel 14 is configured to be operable by the user. For example, the user can start or stop the charge and discharge operation of the first power conversion unit 11 by operating the operation panel 14.

[0023] The relay RL1 is interposed in the power line connecting the terminal T1 and one end side of the first power conversion unit 11. The relay RL2 corresponds to the "first opening and closing means" of the present invention and is interposed in the power line (corresponding to the "first power line" of the present invention) connecting the other end side of the first power conversion unit 11 and the terminal T2. The relay RL2 is opened under the control of the first control unit 12 after the completion of the charge and discharge operation (including the stop of the charge and discharge operation based on the operation of the operation panel 14).

[0024] The starting device 30A is configured to transmit a starting signal to the power conditioner device 20. In the present embodiment, the starting device 30A includes a button switch provided in the charge and discharge device 10 so as to be operable by the user. For example, when the high-voltage DC power supply power is not supplied to the first control power supply unit 13, the user can transmit a starting signal (on signal) from the starting device 30A to the power conditioner device 20 by pressing the button switch of the starting device 30A.

[0025] In the present embodiment, the power conditioner device 20 is a power conditioner device of a hybrid power storage system. The power conditioner device 20 includes terminals T3 to T8, a second power conversion unit 21, a second control unit 22, a second control power supply unit 23, a remote controller 24, and relays RL3 to RL7.

[0026] Terminal T3 corresponds to the "second input / output terminal" of the present invention and is connected to terminal T2 of the charge / discharge device 10. Terminal T4 is connected to the battery 50. Terminal T5 is connected to terminal T4 and the battery 50. Terminal T6 is connected to the solar panel 60. Terminal T7 is a grid connection terminal and is connected to the power grid and the load (loads in the household). Terminal T8 is an independent output terminal and is connected to an important load (important loads in the household) that needs to operate even during a power outage of the power grid.

[0027] The second power conversion unit 21 includes a boost chopper circuit 21a, a bidirectional DC / DC converter circuit 21b, and a bidirectional DC / AC inverter circuit 21c. The boost chopper circuit 21a is connected to the solar panel 60 via terminal T6. The bidirectional DC / DC converter circuit 21b is connected to the battery 50 via terminal T4. The bidirectional DC / AC inverter circuit 21c is connected to the power grid and the load via terminal T7 and is connected to the important load via terminal T8. Also, the boost chopper circuit 21a, the bidirectional DC / DC converter circuit 21b, and the bidirectional DC / AC inverter circuit 21c are interconnected and are connected to terminal T2 of the charge / discharge device 10 via terminal T3.

[0028] The second power conversion unit 21 is supplied with the discharge power (DC power) of the electric vehicle 40 from the charge / discharge device 10, while supplying high-voltage DC power to the charge / discharge device 10. The high-voltage DC power is supplied as charging power to the electric vehicle 40 via the first power conversion unit 11 of the charge / discharge device 10 and is supplied as DC power supply power to the first control power supply unit 13 without passing through the first power conversion unit 11.

[0029] The second control unit 22 controls various operations of the second power conversion unit 21 (boost chopper circuit 21a, bidirectional DC / DC converter circuit 21b, and bidirectional DC / AC inverter circuit 21c) and the opening and closing operations of relays RL3 to RL7, and is configured to communicate with the charge / discharge device 10 and the storage battery 50 (for example, the battery management system of the storage battery 50). The second control unit 22 is composed of an analog control circuit, a digital control circuit using a microcontroller or the like, or a circuit combining an analog control circuit and a digital control circuit.

[0030] The second control power supply unit 23 is configured to generate the power supply voltage of the second control unit 22. Specifically, the second control power supply unit 23 generates the power supply voltage of the second control unit 22 based on the system power of the power grid, the high-voltage DC power supply power supplied from the second power conversion unit 21, and the discharge power of the storage battery 50.

[0031] The remote controller 24 is installed indoors and is configured to be communicable with the second control unit 22 and operable by the user. For example, by operating the remote controller 24, the user can start or stop at least a part of the control executed by the second control unit 22. Also, the user can check the SOC (State of Charge) of the storage battery 50 and the power generation amount of the solar panel 60 from the display screen of the remote controller 24.

[0032] Relay RL3 corresponds to the "second opening / closing means" of the present invention and is interposed in a power line (corresponding to the "second power line" of the present invention) connecting the DC terminal side of the second power conversion unit 21 and terminal T3. Relay RL4 is interposed in a power line connecting the bidirectional DC / DC converter circuit 21b and terminal T4. Relays RL5 to RL7 are interposed in the respective power lines connecting the AC terminal side of the second power conversion unit 21 and terminals T7 and T8.

[0033] In the power conditioner device 20, when the second control unit 22 receives a start signal from the starting device 30A, the second control unit 22 switches the relay RL3 from the open state to the closed state. When the relay RL3 is switched to the closed state, high-voltage DC power supply power is supplied from the second power conversion unit 21 to the terminal T2 of the charge and discharge device 10 via the relay RL3.

[0034] In the charge and discharge device 10, since the relay RL2 is in the open state, the DC power supply power supplied to the terminal T2 is supplied to the first control power supply unit 13 without being supplied to the first power conversion unit 11. As a result, the first control power supply unit 13 is started, and the first control power supply unit 13 generates a power supply voltage based on the DC power supply power and supplies the power supply voltage to the first control unit 12. When the power supply voltage is supplied, the first control unit 12 is started and activates the operation panel 14.

[0035] When the operation panel 14 receives an instruction to start a charge and discharge operation (for example, a charging operation) from the user, the first control unit 12 switches the relays RL1 and RL2 from the open state to the closed state and starts a charge and discharge operation (for example, a charging operation) in the first power conversion unit 11 while communicating with the electric vehicle 40 and the second control unit 22.

[0036] When the charge and discharge operation of the first power conversion unit 11 is completed (for example, when charging is completed because the in-vehicle battery of the electric vehicle 40 is fully charged or when the charge and discharge operation is stopped because the operation panel 14 receives an instruction to stop the charge and discharge operation), the first control unit 12 switches the relays RL1 and RL2 from the closed state to the open state and transmits an end signal regarding the end of the charge and discharge operation to the second control unit 22.

[0037] The second control unit 22 that has received the end signal switches the relay RL3 from the closed state to the open state. When the relay RL3 is switched to the open state, the supply of high-voltage DC power supply power from the second power conversion unit 21 to the first control power supply unit 13 stops. As a result, the first control power supply unit 13 enters the stopped state, and the charge and discharge device 10 enters the completely stopped state.

[0038] In the power supply system 1A according to this embodiment, after the charge / discharge operation is completed and until the starting device 30A is operated, the charge / discharge device 10 can be set to a complete stop state, and the power consumption of the charge / discharge device 10 can be set to zero. Further, since the supply of high-voltage DC power supply power to the charge / discharge device 10 is stopped, for example, when the electric vehicle 40 accidentally collides with the charge / discharge device 10, a dangerous state (such as electric shock or fire) can be avoided.

[0039] Note that when DC power supply power is not supplied from the power conditioner device 20 to the first control power supply unit 13 (for example, when there is a power outage in the power grid, the battery remaining amount of the storage battery 50 is zero, and the solar panel 60 is not generating power), the power of the auxiliary battery mounted on the electric vehicle 40 (in this embodiment, 12V power supply power) may be used to generate the power supply voltage of the first control unit 12.

[0040] [Second Embodiment] FIG. 2 shows a power supply system 1B according to the second embodiment of the present invention. The power supply system 1B includes a charge / discharge device 10 (corresponding to the "first power supply device" of the present invention), a power conditioner device 20 (corresponding to the "second power supply device" of the present invention), and a starting device 30B.

[0041] The charge / discharge device 10 has the same configuration as that of the first embodiment except that it does not include the starting device 30A. The power conditioner device 20 has the same configuration as that of the first embodiment except that it receives a starting signal from the starting device 30B instead of the starting device 30A.

[0042] The starting device 30B is configured to transmit a starting signal to the second control unit 22 of the power conditioner device 20. In this embodiment, the starting device 30B is a portable terminal configured to be portable by the user. For example, a smartphone, a tablet, or a notebook computer having a function (such as software) for transmitting a starting signal can be used as the starting device 30B.

[0043] By operating the starting device 30B, the user can transmit a start signal from the starting device 30B to the second control unit 22 of the power conditioner device 20. In this embodiment, the start signal is directly transmitted from the starting device 30B to the second control unit 22. However, for example, the start signal may be transmitted from the starting device 30B to the second control unit 22 via the remote controller 24 of the power conditioner device 20.

[0044] The power supply system 1B according to this embodiment can exhibit the same effects as the power supply system 1A of the first embodiment. Furthermore, according to the power supply system 1B of this embodiment, since the starting device 30B is configured to be portable, the user can operate the starting device 30B at a location away from the charge / discharge device 10 to start the first control power supply unit 13 of the charge / discharge device 10.

[0045] [Modification Example] As described above, embodiments of the power supply system according to the present invention have been described. However, the present invention is not limited to the above embodiments.

[0046] The power supply system according to the present invention includes a first power conversion unit that performs a charge / discharge operation (charge operation and / or discharge operation) on an electric vehicle, a first control unit that controls the charge / discharge operation of the first power conversion unit, and a first control power supply unit that generates a power supply voltage for the first control unit. The power supply system further includes a starting device that transmits a start signal to the second control unit. When the second control unit receives the start signal, it causes the first control power supply unit to be supplied with power from the second power conversion unit. If the first control power supply unit generates a power supply voltage based on the power, the configuration can be appropriately changed.

[0047] For example, as the starting device of the present invention, the starting device 30A of the first embodiment and the starting device 30B of the second embodiment may be used in combination.

[0048] As the second power supply device of the present invention, in the above embodiment, the power conditioner device 20 of the hybrid power storage system is used. However, the second power supply device of the present invention may be a power conditioner device of a power storage system that does not include a power generation device, or a power conditioner device of a power generation device that does not include a storage battery.

Explanation of Signs

[0049] 1A, 1B Power supply system 10 Charge and discharge device 11 First power conversion unit 12 First control unit 13 First control power supply unit 14 Operation panel 20 Power conditioner device 21 Second power conversion unit 22 Second control unit 23 Second control power supply unit 24 Remote control 30A, 30B Starter 40 Electric vehicle 50 Storage battery 60 Solar panel

Claims

1. A first power supply device including a first power conversion unit that performs a charge / discharge operation on an electric vehicle, a first control unit that controls the charge / discharge operation of the first power conversion unit, and a first control power supply unit that generates a power supply voltage for the first control unit; A second power supply device including a second power conversion unit and a second control unit that controls the second power conversion unit; A power supply system including: Further including a starting device, The starting device transmits a start signal to the second control unit, When receiving the start signal, the second control unit causes the second power conversion unit to supply power to the first control power supply unit, The first control power supply unit generates the power supply voltage based on the power supply power A power supply system characterized by the above.

2. The first power supply device includes: A first input / output terminal connected to the second power supply device, A first switching means interposed in a first power line connecting the first input / output terminal and the first power conversion unit, The second power supply device includes: A second input / output terminal connected to the first input / output terminal, A second switching means interposed in a second power line connecting the second input / output terminal and the second power conversion unit, After the charge / discharge operation by the first power conversion unit ends, the second control unit opens the second switching means to stop the supply of the power supply power from the second power conversion unit to the first control power supply unit The power supply system according to Claim 1, characterized by the above.

3. The first control power supply unit is connected between the first input / output terminal and the first switching means in the first power line, After the charge / discharge operation by the first power conversion unit ends, the first control unit opens the first switching means The power supply system according to Claim 2, characterized by the above.

4. The starting device is provided in the first power supply device The power supply system according to Claims 1 to 3, characterized by the above.

5. The starting device is a mobile terminal The power supply system according to Claims 1 to 3, characterized by the above.

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