Charging device for electric vehicle and power supply method and power supply system using the same

Abstract

This invention provides a charging device for electric vehicles and a power supply method and system thereof. The charging device includes a main control module and an auxiliary start-up module. The main control module includes a processing circuit and a relay. The relay is connected to the processing circuit and is used to connect the electric vehicle. The auxiliary start-up module includes a power line interface and a charging protocol controller. The charging protocol controller is connected to the power line interface. The charging protocol controller is used to confirm whether a DC power supply is connected to the power line interface. The DC power supply supplies power to the main control module through the power line interface to start the main control module, enabling the electric vehicle to supply power to a power grid or a household appliance through the main control module.

Description

Technical Field

[0001] This invention relates to a charging device and a power supply method and system thereof, and more particularly to a charging device for an electric vehicle and a power supply method and system thereof. Background Technology

[0002] Electric vehicles, with their advantages of being quiet and producing no exhaust fumes, have gained popularity among drivers. Electric vehicles require charging equipment. In current designs, when the power grid is interrupted, the charging equipment can only charge the electric vehicle in one direction, and cannot allow the electric vehicle to supply power to the grid or household appliances in reverse. Summary of the Invention

[0003] The present invention relates to a charging device for an electric vehicle and a power supply method and power supply system thereon, which uses a DC power supply to start the charging device so that when the power grid is interrupted, the electric vehicle can still supply power to the power grid or household appliances in reverse through the charging device.

[0004] According to one aspect of the present invention, a charging device for an electric vehicle is provided. The charging device includes a main control module and an auxiliary start-up module. The main control module includes a processing circuit and a relay. The relay is connected to the processing circuit and is used to connect the electric vehicle. The auxiliary start-up module includes a power line interface and a charging protocol controller. The charging protocol controller is connected to the power line interface. The charging protocol controller is used to confirm whether a DC power supply is connected to the power line interface. The DC power supply supplies power to the main control module via the power line interface to start the main control module, enabling the electric vehicle to supply power to a power grid or a household appliance through the main control module.

[0005] According to another aspect of the present invention, a method for supplying power to an electric vehicle via a charging device is provided. The method includes the following steps: A charging protocol controller of an auxiliary start-up module confirms whether a DC power supply is connected to a power line interface of the auxiliary start-up module. If a DC power supply is connected to the power line interface of the auxiliary start-up module, the DC power supply supplies power to the main control module via the power line interface to start the main control module. The main control module notifies the electric vehicle that the main control module is in a start-up state. The electric vehicle supplies power to a power grid or a household appliance through the main control module.

[0006] According to another aspect of the present invention, a power supply system is provided. The power supply system includes an electric vehicle and a charging device. The charging device includes a main control module and an auxiliary start-up module. The main control module includes a processing circuit and a relay. The relay is connected to the processing circuit and is used to connect the electric vehicle. The auxiliary start-up module includes a power line interface and a charging protocol controller. The charging protocol controller is connected to the power line interface. The charging protocol controller is used to confirm whether a DC power supply is connected to the power line interface. The DC power supply supplies power to the main control module via the power line interface to start the main control module, enabling the electric vehicle to supply power to a power grid or a household appliance through the main control module.

[0007] To provide a better understanding of the above and other aspects of the present invention, specific embodiments are described below in conjunction with the accompanying drawings: Attached Figure Description

[0008] Figure 1 To realize the reverse power supply of an electric vehicle to the power grid or home appliances according to an embodiment of the present invention;

[0009] Figure 2 This is a schematic diagram of a power supply system according to an embodiment of the present invention;

[0010] Figure 3 This is a flowchart illustrating a power supply method for an electric vehicle via a charging device according to an embodiment of the present invention;

[0011] Figure 4 This is a detailed flowchart of step S120 according to an embodiment of the present invention;

[0012] In the attached figures, the following labels are used:

[0013] 100: Electric vehicles

[0014] 200: Charging equipment

[0015] 210: Main control module

[0016] 211: Processing Circuit

[0017] 212: Relay

[0018] 213: Control and guidance circuit

[0019] 214: DC-DC converter circuit

[0020] 220: Auxiliary Startup Module

[0021] 221: Power cord connector

[0022] 222: Charging Protocol Controller

[0023] 223: Step-down to transformer converter

[0024] 224: Buck Converter

[0025] 300: DC power supply

[0026] 400: Power Grid

[0027] 500: Home Appliances

[0028] 1000: Power Supply System

[0029] MS0: Notification message

[0030] MS1: Charging Stop Notification

[0031] PH1: Status communication path

[0032] PH2: Integrated bus path

[0033] S110, S120, S121, S122, S123, S130, S140, S150: Steps. Detailed Implementation

[0034] The technical terms used in this specification refer to those commonly used in the field. Where this specification provides explanations or definitions for certain terms, the interpretation of those terms shall be based on the explanations or definitions provided in this specification. Each embodiment of the present invention has one or more technical features. Where feasible, those skilled in the art may selectively implement some or all of the technical features in any embodiment, or selectively combine some or all of the technical features in these embodiments.

[0035] Please refer to Figure 1 This invention describes a scenario where an electric vehicle 100 supplies reverse power to a power grid 400 or a home appliance 500, according to an embodiment of the present invention. In this invention, the power supply system 1000 includes an electric vehicle 100, a charging device 200, a DC power supply 300, a power grid 400, and a home appliance 500. The electric vehicle 100 may be, for example, an electric car, a hybrid electric vehicle, an electric bicycle, or an electric-assisted bicycle, but is not limited thereto. The charging device 200 may be, for example, a fixed charging pile or a fixed charging station, but is not limited thereto. The DC power supply 300 may be, for example, a portable power source, a rechargeable battery, or an electronic device with a discharge function, but is not limited thereto. The home appliance 500 may be, for example, a robot vacuum cleaner, a mobile phone, a computer, an emergency lighting device, or any rechargeable electronic device, but is not limited thereto. However, the above examples are not limiting.

[0036] When the power grid 400 stops supplying power, the charging device 200 cannot be started via the power grid 400. In this embodiment, the charging device 200 can be started via the DC power supply 300. Then, the electric vehicle 100 can supply power to the power grid 400 via the charging device 200 (e.g., selling the power back to the power company). Alternatively, the electric vehicle 100 can supply power to the household appliance 500 via the charging device 200. In this way, the charging device 200 can achieve reverse power supply from the electric vehicle 100 to the power grid 400 or the household appliance 500. In particular, even when the power grid 400 is interrupted, the charging device 200 can still be started using the technology of this invention to achieve reverse power supply.

[0037] Please refer to Figure 2 This is a schematic diagram of a power supply system 1000 according to an embodiment of the present invention. The charging device 200 of the power supply system 1000 includes a main control module 210 and an auxiliary start-up module 220. The main control module 210 is, for example, a circuit board or a system-on-a-chip, but is not limited thereto. The main control module 210 is used to execute a charging monitoring program. The charging monitoring program includes functions such as charging switching, current / voltage control, overcurrent protection, overvoltage protection, overtemperature protection, and leakage current protection. The auxiliary start-up module 220 is, for example, a circuit board, a system-on-a-chip, or an external device, but is not limited thereto. The auxiliary start-up module 220 is used to start the main control module 210 via a DC power supply 300 when the mains grid 400 is de-energized.

[0038] The main control module 210 includes a processing circuit 211, a relay 212, a control pilot circuit 213, and a DC-D converter. The processing circuit 211 performs various analysis, control, and processing procedures. The relay 212, also known as a relay, has a control system (also called an input circuit) and a controlled system (also called an output circuit). The relay 212 is an automatic switch that uses a small current to control a large current, thus serving functions such as automatic adjustment, safety protection, and circuit switching in the circuit. The control pilot circuit 213 is connected to the processing circuit 211 and the DC-D converter 214. The control pilot circuit 213 monitors the interaction between the electric vehicle 100 and the power supply equipment, and can also serve as a device for determining the connection status and rated current parameters of the charging connection device.

[0039] The auxiliary startup module 220 includes a power cord interface 221, a charging protocol controller 222, a buck-boost converter 223, and a buck converter 224. The power cord interface 221 is, for example, a USB Type-C interface, a USB 2.0 interface, or a micro USB interface, but is not limited thereto. The charging protocol controller 222 is, for example, a USB Type-C PD controller, but is not limited thereto. In this embodiment, the charging protocol controller 222 can confirm whether the power cord interface 221 is connected to the DC power supply 300. The DC power supply 300 supplies power to the main control module 210 via the power cord interface 221 to start the main control module 210, enabling the electric vehicle 100 to supply power to the power grid 400 or the home appliance 500 through the main control module 210. A flowchart is provided below to illustrate the operation of each component.

[0040] Please refer to Figure 3 This is a flowchart illustrating a method for supplying power to an electric vehicle 100 via a charging device 200 according to an embodiment of the present invention. The method for supplying power to the electric vehicle 100 via the charging device 200 includes steps S110 to S150. In step S110, as... Figure 2 As shown, the charging protocol controller 222 of the auxiliary start module 220 confirms whether the power cord interface 221 of the auxiliary start module 220 is connected to the DC power supply 300. If the power cord interface 221 of the auxiliary start module 220 is connected to the DC power supply 300, then proceed to step S120.

[0041] In step S120, as Figure 2 As shown, DC power supply 300 supplies power to main control module 210 via power line interface 221 to start main control module 210. Please refer to... Figure 4 This is a detailed flowchart of step S120 according to an embodiment of the present invention. Step S120 may include steps S121 to S123, but is not limited thereto.

[0042] In step S121, as Figure 2 As shown, the charging protocol controller 222 requests a first voltage V1 from the DC power supply 300. The first voltage V1 is, for example, 5V, 15V, 12V, 19V, or 20V, but is not limited thereto.

[0043] In step S122, as Figure 2 As shown, the step-down converter 223 of the auxiliary startup module 220 converts the power supply of the first voltage V1 into a power supply of the second voltage V2.

[0044] In step S123, as Figure 2As shown, a buck converter 224 in the auxiliary startup module 220 converts the power supply of the first voltage V1 to a power supply of the third voltage V3. The second voltage V2 and the third voltage V3 have opposite polarities and the same magnitude. The second voltage V2 and the third voltage V3 are, for example, +12V and -12V, but are not limited thereto.

[0045] In step S120 above, as Figure 2 As shown, the auxiliary start module 220 notifies the main control module 210 through a status communication path PH1 that the power source of the main control module 210 is the auxiliary start module 220.

[0046] Next, in step S130, as Figure 2 As shown, the main control module 210 notifies the electric vehicle 100 that the main control module 210 is in a startup state via a notification message MS0.

[0047] Then, in step S140, as Figure 2 As shown, after receiving the notification message MS0, the electric vehicle 100 can decide whether to supply power to the power grid 400 or the appliance 500. If it wishes to supply power to the power grid 400 or the appliance 500, it proceeds to step S150.

[0048] Next, in step S150, as Figure 2 As shown, the electric vehicle 100 supplies power to the power grid 400 or the appliance 500 via the main control module 210. In this step, once the electric vehicle 100 has supplied power to the power grid 400 or the appliance 500 via the main control module 210, an integrated bus path (I2C) PH2 of the auxiliary start module 220 provides a stop charging notification MS1 ​​to the auxiliary start module 220. At this time, it is no longer necessary to supply power to the main control module 210 from the DC power supply 300.

[0049] According to the above embodiment, when the power grid 400 is de-energized, the DC power supply 300 can be used to start the charging device 200. After the charging device 200 is started, the electric vehicle 100 can supply power to the power grid 400 via the charging device 200 (e.g., selling the power back to the power company). Alternatively, the electric vehicle 100 can supply power to the household appliance 500 via the charging device 200. In this way, the charging device 200 can achieve reverse power supply from the electric vehicle 100 to the power grid 400 or the household appliance 500. In particular, even when the power grid 400 is de-energized, reverse power supply can still be achieved by starting the charging device 200 using the technology of this invention.

[0050] In summary, although the present invention has been disclosed above with reference to embodiments, it is not intended to limit the invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A charging device for an electric vehicle, characterized in that: include: One main control module; as well as An auxiliary startup module, including: One power cord connector; and A charging protocol controller is connected to the power line interface. The charging protocol controller is used to confirm whether the power line interface is connected to a DC power source. The DC power source supplies power to the main control module through the power line interface to start the main control module, so that the electric vehicle can supply power to a power grid or a household appliance through the main control module.

2. The charging device for electric vehicles according to claim 1, wherein: The main control module includes: One processing circuit; A relay is connected to the processing circuit and is used to connect the electric vehicle; A DC converter circuit is connected to the processing circuit; and A control guide circuit is connected to the processing circuit and the DC-DC conversion circuit.

3. The charging device for electric vehicles according to claim 1, wherein: The charging protocol controller is used to request a first voltage from the DC power supply.

4. The charging device for electric vehicles according to claim 3, wherein: The auxiliary startup module further includes: A step-down converter is connected to the power line interface; and A step-down converter is connected to the power line interface.

5. The charging device for electric vehicles according to claim 4, wherein: The buck converter is used to convert the first voltage power supply to a second voltage power supply, and the buck converter is used to convert the first voltage power supply to a third voltage power supply.

6. The charging device for electric vehicles according to claim 5, wherein: The second voltage and the third voltage have opposite polarities but the same magnitude.

7. The charging device for electric vehicles according to claim 1, wherein: Including: A status communication path is connected between the main control module and the auxiliary start-up module. When the DC power supply supplies power to the main control module through the power line interface, the status communication path is used to notify the main control module that the power source of the main control module is the auxiliary start-up module.

8. The charging device for electric vehicles according to claim 1, wherein: Including: An integrated bus path is connected between the main control module and the auxiliary start module. When the electric vehicle supplies power to the power grid or the home appliance through the main control module, the integrated bus path is used to provide a stop charging notification to the auxiliary start module.

9. The charging device for electric vehicles according to claim 1, wherein: The charging device is a fixed charging station, and the DC power supply is a portable power source.

10. The charging device for electric vehicles according to claim 1, wherein: The charging protocol controller is a USB Type-C PD controller.

11. The charging device for electric vehicles according to claim 1, wherein: The power cord interface can be a USB Type-C interface, a USB 2.0 interface, or a micro USB interface.

12. A method for supplying power to an electric vehicle via a charging device, characterized in that: include: An auxiliary start module confirms whether one of its power cord interfaces is connected to a DC power source. If the power supply interface of the auxiliary startup module is connected to the DC power supply, the DC power supply supplies power to a main control module via the power supply interface to start the main control module; and The electric vehicle supplies power to a power grid or a household appliance through this main control module.

13. The power supply method for an electric vehicle via a charging device as described in claim 12, characterized in that: One of the auxiliary start-up modules, the charging protocol controller, confirms whether the power line interface of the auxiliary start-up module is connected to the DC power supply.

14. The power supply method for an electric vehicle via a charging device as described in claim 12, characterized in that: Including: The main control module notifies the electric vehicle via a notification message that the main control module is in a startup state.

15. The power supply method for an electric vehicle via a charging device as described in claim 12, characterized in that: The steps by which the DC power supply supplies power to the main control module via the power line interface include: One of the auxiliary startup modules, the charging protocol controller, requests a first voltage from the DC power supply.

16. The power supply method for an electric vehicle via a charging device as described in claim 15, characterized in that: The process of supplying power from the DC power supply to the main control module via the power line interface further includes: The auxiliary startup module uses a step-down converter to convert the first voltage power supply into a second voltage power supply; and The auxiliary startup module uses a step-down converter to convert the first voltage power supply into a third voltage power supply, wherein the second voltage and the third voltage have opposite polarities and the same magnitude.

17. The method for supplying power to an electric vehicle via a charging device as described in claim 12, characterized in that: When the DC power supply supplies power to the main control module via the power line interface, the auxiliary start module notifies the main control module through a status communication path that the power source of the main control module is the auxiliary start module.

18. The method for supplying power to an electric vehicle via a charging device as described in claim 12, characterized in that: When the electric vehicle supplies power to the power grid or the home appliance through the main control module, one of the integrated bus paths of the auxiliary start module provides a stop charging notification to the auxiliary start module.

19. The method for supplying power to an electric vehicle via a charging device as described in claim 12, characterized in that: The charging device is a fixed charging station, and the DC power supply is a portable power source.

20. A power supply system characterized by: include: An electric vehicle; as well as A charging device, including: One main control module; and An auxiliary startup module, including: One power cord interface; and A charging protocol controller is connected to the power line interface. The charging protocol controller is used to confirm that the power line interface is connected to a DC power source. The DC power source supplies power to the main control module through the power line interface to start the main control module, so that the electric vehicle can supply power to a power grid or a household appliance through the main control module.

21. The power supply system of claim 20, wherein: The main control module includes: One processing circuit; A relay is connected to the processing circuit and used to connect the electric vehicle; A DC converter circuit is connected to the processing circuit; and A control guide circuit is connected to the processing circuit and the DC-DC conversion circuit.

22. The power supply system of claim 20, wherein: The charging protocol controller is used to request a first voltage from the DC power supply.

23. The power supply system of claim 22, wherein: The auxiliary startup module further includes: A step-down converter is connected to the power line interface; and A step-down converter is connected to the power line interface.

24. The power supply system of claim 23, wherein: The buck converter is used to convert the first voltage power supply to a second voltage power supply, and the buck converter is used to convert the first voltage power supply to a third voltage power supply.

25. The power supply system of claim 24, wherein: The second voltage and the third voltage have opposite polarities but the same magnitude.

26. The power supply system as described in claim 20, characterized in that: The charging device further includes: A status communication path is connected between the main control module and the auxiliary start-up module. When the DC power supply supplies power to the main control module through the power line interface, the status communication path is used to notify the main control module that the power source of the main control module is the auxiliary start-up module.

27. The power supply system of claim 20, wherein: The charging device further includes: An integrated bus path is connected between the main control module and the auxiliary start module. When the electric vehicle supplies power to the power grid or the home appliance through the main control module, the integrated bus path is used to provide a stop charging notification to the auxiliary start module.

28. The power supply system of claim 20, wherein: The charging device is a fixed charging station, and the DC power supply is a portable power source.

29. The power supply system of claim 20, wherein: The charging protocol controller is a USB Type-CPD controller.

30. The power supply system of claim 20, wherein: The power cord interface can be a USB Type-C interface, a USB 2.0 interface, or a micro USB interface.

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