Vehicle charging and discharging control system and method

Abstract

To provide a V2H (Vehicle to Home) technique for supplying battery power of a vehicle to home.SOLUTION: A system for controlling charging / discharging of a vehicle includes a charging / discharging controller (VCMS) 700 configured to activate a power source of an external controller (V2H) 500 by supplying a power source from a vehicle battery 100 and perform V2H operation without the need for a user to turn on start-up of the vehicle and set a V2H mode.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to V2H technology for supplying battery power of a vehicle to a home. More specifically, even when the power supply to the home is cut off, the vehicle's battery can be used to supply power to the V2H controller power supply. The present invention relates to a charge-discharge control system and method for a vehicle.

Background Art

[0002] The technology of supplying the power of an electric vehicle battery to a home is called V2H (Vehicle to Home) technology. With V2H technology, an electric vehicle serves as both a power storage device and a power supply device. In particular, when a power outage occurs due to an unexpected situation, power can be supplied from the electric vehicle to the home by utilizing V2H technology. Furthermore, when disaster victims (such as typhoons, floods, earthquakes, etc.) cannot receive power supply, rapid power supply to temporary housing facilities is possible via V2H technology.

[0003] V2H includes a device that converts the DC voltage of an electric vehicle battery into household AC power, and also includes a controller capable of communicating with the vehicle.

[0004] VCMS (Vehicle Charging Management System) is a controller that generalizes the charging and discharging of an electric vehicle, exchanges information with V2H and a high-voltage battery, and performs charge-discharge sequences and diagnoses. Generally, since the DC power of an electric vehicle battery is transmitted via V2H, it often conforms to the CHAdeMO (CHAdeMO) standard.

[0005] When supplying power via V2H, a type of inverter called EVPS (Electric Vehicle Power System) is used to convert the power into AC power for use in the home and supply it. This is usually done in three ways.

[0006] Firstly, the EVPS and the distribution board can be configured independently. This refers to a case where the EVPS connected to the electric vehicle is installed in the home, and the outlet connected to the EVPS is located within the home. In this case, the outlet connected to the EVPS is in an independent state, not connected to the home's distribution board. In other words, the outlet connected to the EVPS cannot be used because it will not receive electricity unless connected via V2H.

[0007] Secondly, the system can be configured to allow selection between the EVPS and the distribution board. In this case, the EVPS and the distribution board are not directly connected, and the system can be used by selecting to connect the distribution board via a switching device or by connecting V2H.

[0008] Thirdly, it can be configured to enable bidirectional V2H. This means that the distribution panel is connected to the EVPS via a power converter, and the power converter changes the flow of electricity according to the intended use, so that electricity can be supplied from the electric vehicle to the home via the EVPS, or conversely, the vehicle can be charged via the EVPS.

[0009] On the other hand, V2H adheres to a standard where power supply proceeds only after compatibility checks are completed through communication with the vehicle. In this case, V2H must be able to operate even when the power supply to the home is cut off, but there is a problem that when the power to the home is cut off, the power to the V2H controller is cut off, and V2H communication with the vehicle becomes impossible. Therefore, not only the power to be supplied but also the 12V power supply for the V2H controller needs to be supplied from the vehicle.

[0010] To supply power to a home via V2H, the vehicle's VCMS and V2H controller must first communicate. To facilitate this V2H operation, the ignition (IG) must be turned on to activate the VCMS power supply. However, turning on the ignition (IG) activates the power supply not only to the components necessary for V2H but also to all components in the vehicle, resulting in unnecessary current consumption.

[0011] Another way for the VCMS and V2H controllers to communicate is to configure the AVN (Audio, Video, Navigation) settings to activate only the power to the controllers required for V2H. However, this has the drawback of requiring the user to configure the settings while moving between indoors and outdoors.

[0012] On the other hand, one way to supply power from the vehicle to the V2H controller is to use pin 3 of the CHAdeMo charging port. This has the advantage that V2H power can be supplied by simply connecting the V2H cable. However, it has the disadvantage that a protection circuit such as a fuse must be added, and the vehicle must be turned on and set to V2H mode in order to supply V2H power.

[0013] Therefore, there is a need to develop technology that allows power to be supplied from the vehicle's battery to the V2H controller, enabling V2H operation simply by connecting cables without any special operation by the user.

[0014] The matters described above as background technology are intended solely to enhance understanding of the background of the present invention and should not be taken as constituting prior art already known to those with ordinary skill in this art. [Prior art documents] [Patent Documents]

[0015] [Patent Document 1] Korean Patent Publication No. 10-2021-0108857 [Overview of the project] [Problems that the invention aims to solve]

[0016] The present invention has been made to solve the aforementioned problems, and its objective is to provide a vehicle charge / discharge control system and method that can activate the V2H power supply by supplying power from the vehicle battery, enabling V2H operation without the user having to turn on the vehicle start or set it to V2H mode. [Means for solving the problem]

[0017] A vehicle charge / discharge control system according to the present invention for achieving the above objective includes a vehicle battery capable of charging and discharging, an external controller connected to the vehicle and controlled to exchange power, a switch for connecting / disconnecting the vehicle battery and the external controller, and a charge / discharge controller that, when the vehicle is started or the charging door is opened, closes the switch and controls the vehicle battery and the external controller to be connected.

[0018] Furthermore, the charge / discharge controller can be activated when the vehicle is started or the charging door is opened, and the vehicle battery and the external controller can be connected via the vehicle's charging inlet, which can be configured to use pin 3 of the CHAdeMO charging port.

[0019] Furthermore, the charge / discharge controller may include an MCU (Micro Controller Unit), and the MCU's signals can also control the switch to close and connect the vehicle battery to the external controller. After the power supply is activated, it can determine whether it is connected to a charger or an external controller, and control the switch to shut off if it is connected to a charger, or to maintain the switch connection if it is connected to an external controller.

[0020] Furthermore, the charge / discharge controller can be controlled to activate only the power supply for the systems related to charging and discharging, and when the external controller is finished, it can switch to a power-saving mode that shuts off the switch and allows the cable to be disconnected.

[0021] In addition, the external controller can set an end command or the minimum SOC (State of Charge) of the battery using a mobile device.

[0022] The vehicle charge-discharge control method according to the present invention for achieving the above object includes: a step of activating the power supply of the charge-discharge controller when the start of the vehicle or the opening of the charge door is recognized; a step of the charge-discharge controller connecting a switch connected between the vehicle battery and the external controller; and a step of supplying the power of the vehicle battery to the external controller to activate the power supply of the external controller.

[0023] In the step of activating the power supply of the external controller, the vehicle battery and the external controller can supply the power of the vehicle battery to the external controller using the third pin of the CHademo (CHarge de MOve) charging inlet.

[0024] In the step of connecting the switch, the charge-discharge controller can also control to close the switch by an MCU signal so that the vehicle battery and the external controller are connected, and the charge-discharge controller determines whether it is connected to a charger or an external controller. When connected to a charger, the switch can be cut off, and when connected to an external controller, the connection of the switch can be maintained.

[0025] On the other hand, the charge-discharge controller can be controlled to activate only the power supply of the system related to charge-discharge, and the external controller may further include a step of setting an end command or the minimum SOC (State of Charge) of the battery using a mobile device.

Advantages of the Invention

[0026] According to the vehicle charge-discharge control system and method of the present invention, the power of the vehicle battery can be supplied to activate the power supply of V2H, and V2H operation is possible without the user turning on the start of the vehicle or setting it to the V2H mode.

[0027] Furthermore, in V2H mode, only the power supply for the charging and discharging related systems is activated, minimizing the vehicle's power consumption. In addition, V2H can be terminated or the minimum SOC (State of Charge) can be remotely set using a mobile device. [Brief explanation of the drawing]

[0028] [Figure 1] This is a block diagram of the V2H power supply using VCMS according to the present invention. [Figure 2] This is a diagram showing the shape and pin configuration of the CHAdeMo charging port. [Figure 3] This is a flowchart of a V2H power supply scenario according to one embodiment of the present invention. [Figure 4] This is a flowchart of a V2H power termination scenario according to one embodiment of the present invention. [Figure 5] This is a conceptual diagram of control using a mobile device according to one embodiment of the present invention. [Modes for carrying out the invention]

[0029] Figure 1 is a block diagram of V2H power supply using VCMS according to the present invention, Figure 2 is a configuration diagram showing the shape and pins of the CHAdeMo charging port, Figure 3 is a flowchart of a V2H power supply scenario according to one embodiment of the present invention, Figure 4 is a flowchart of a V2H power termination scenario according to one embodiment of the present invention, and Figure 5 is a conceptual diagram of control by a mobile device according to one embodiment of the present invention.

[0030] Figure 1 is a block diagram of the V2H power supply using VCMS according to the present invention.

[0031] The VCMS (Vehicle Charging Management System) consists of a vehicle battery 100, a charge / discharge controller, a rapid inlet 400, and a switch 300. It operates using power from the vehicle's internal battery 100 and can achieve V2H (Vehicle-to-Home) by connecting to an external controller 500.

[0032] A controller according to an exemplary embodiment of the present invention can be implemented via a non-volatile memory (not shown) configured to store data relating to an algorithm configured to control the operation of various components of a vehicle, or software instructions that implement the algorithm, and a processor (not shown) configured to perform the operations described below using the data stored in the memory. Here, the memory and the processor can be implemented on separate chips. Alternatively, the memory and the processor may be implemented on a single integrated chip, and the processor may take the form of one or more processors.

[0033] The vehicle's battery 100 is a rechargeable battery 100, and can generally be a 12V battery 100. The vehicle's battery 100 can be connected to the power supply of an external controller 500 via a switch 300 and a rapid inlet 400, and a fuse 200 can be configured between the battery 100 and the rapid inlet 400 to protect the circuit.

[0034] The rapid inlet 400 is a vehicle charging port that generally serves to connect directly to a high-voltage battery 100 using DC high voltage without going through an OBC (On-Board Charger). In one embodiment, a DC combo type that allows slow charging and rapid charging through a single charging port, or the CHAdeMO 10 standard can be adopted. In one embodiment, when a CHAdeMO 10 standard charging port is used, V2H power supply between the vehicle battery 100 and the external controller 500 can be performed via pin 3 of the CHAdeMO 10. Furthermore, pin 3 can also be used when power from the vehicle battery 100 is supplied to power the external controller 500. However, if a charger for vehicle charging is connected instead of an external controller 500 for V2H, pin 3 does not need to be used.

[0035] Switch 300 is installed between the vehicle's battery 100 and the rapid inlet 400, and serves to connect / disconnect the battery 100 and the external controller 500. In one embodiment, when switch 300 is closed, the vehicle's battery 100 and the power supply of the external controller 500 are connected, and power is supplied to the external controller 500. Conversely, to disconnect the power supply to the external controller 500, switch 300 is opened.

[0036] The charge / discharge controller 700 controls the activation of the VCMS power supply and controls the connection or disconnection of the switch 300. Specifically, the VCMS power supply is activated when the vehicle's power supply is activated or when the charging door 630 of the vehicle's charging port is opened. In this case, the vehicle's power supply may be the IG3 power supply 610, which is a charge / discharge related power supply used only when charging an electric vehicle.

[0037] In one embodiment, when the IG3 power supply 610 is activated or the opening of the charging door 630 is detected, the VCMS power supply determination unit 730 activates the VCMS power supply 750. When the VCMS power supply 750 is activated, the power supply to the MCU (Micro Controller Unit) 710 is also activated, enabling control of the switch 300 and the charge / discharge related controller 800. This makes it possible to activate only the power supplies of the controllers necessary for V2H.

[0038] In another embodiment, the VCMS power supply 750 can also be activated by a signal from the MCU 710. More specifically, after the VCMS power supply 750 is activated and the MCU 710 is also activated, the VCMS power supply may suddenly turn off. In this case, the VCMS power supply needs to be activated again for a stable V2H system shutdown. At this time, the VCMS power supply determination unit 730 can receive a signal from the MCU 710 and reactivate the VCMS power supply that suddenly turned off.

[0039] The charge / discharge controller 700 controls a switch 300 located between the vehicle's battery 100 and the external controller 500 via the MCU 710. In this case, first, when the VCMS power supply is activated, the switch 300 is opened to activate the power supply to the external controller 500 for V2H. Then, the VCMS determines whether it is connected to the charger or the external controller 500 for V2H. If it is determined that it is connected to the charger, the switch 300 is opened; if it is determined that it is connected to the external controller 500, the switch 300 is kept closed.

[0040] Figure 2 is a diagram showing the shape and pin configuration of the CHAdeMo fast charger port. The CHAdeMo standard uses a 10-pin connector, and as shown in Figure 2, pin 1 is GND, pin 2 is CSS1 (Charge Sequence Signal 1), pin 3 is unused, pin 4 is Vehicle charge permission, pin 5 is DC output N, pin 6 is DC output P, ​​pin 7 is Connector proximity detection, pins 8 and 9 are CAN, and pin 10 is CSS2 (Charge sequence signal 2).

[0041] When connecting a charging cable to charge a vehicle, pin 3 is not used. However, when performing V2H, power can be supplied via pin 3 of the CHAdeMO 10. This has the advantage that power can be supplied simply by connecting the V2H cable, without the need for a separate cable.

[0042] Figure 3 is a flowchart of a V2H power supply scenario according to one embodiment of the present invention.

[0043] First, when the vehicle's IG3 power supply 610 is activated or the opening of the charging door 630 is detected, the power supplies for the VCMS and MCU 710 are activated (S101, S102). Simultaneously with the activation of the power supply, the MCU 710 activates the power supplies for the charge / discharge related systems in the VCMS, such as the BMS (Battery Management System), bidirectional OBC, and LDC (Low Voltage DC-DC Converter) (S103). At the same time, the switch 300, which can connect the vehicle's battery 100 to the external controller 500, is connected to activate the power supply for the external controller 500 (S105). At this time, a procedure to check whether the charging connector is properly locked may be included for safety (S106). With the power supply for the external controller 500 activated, V2H operation becomes possible, and the connection status of the VCMS and cable and the compatibility of the battery 100 are checked (S107). This can be done via CAN (Controller Area Network) communication. The VCMS then determines whether the vehicle is connected to the charger or to the external controller 500 for V2H (S108). If it determines that the vehicle is connected to the charger, it opens the switch 300 (S109), and if it determines that the vehicle is connected to the external controller 500, it keeps the switch 300 closed (S110). After performing an insulation check of the high-voltage components, it starts charging or discharging (S111, S112).

[0044] Figure 4 is a flowchart of a V2H power termination scenario according to one embodiment of the present invention.

[0045] When the VCMS receives a termination command, the power supplied from the vehicle to the home begins to cut off (S201). The external controller 500 checks that the output voltage has become sufficiently low and then unlocks the connector for the V2H connection (S202, S203). Subsequently, the external controller 500 terminates the V2H control (S204), which causes the VCMS to shut off (open) switch 300 (S205). By shutting off switch 300, the power supplied from the vehicle's battery 100 to the external controller 500 is cut off, thus preventing the battery 100 from discharging. After switch 300 is shut off, the VCMS switches to power-saving mode so that only the minimum power necessary for the complete shutdown of the VCMS is consumed (S206). Subsequently, when the cable connected to the rapid inlet 400 is disconnected, the power to the VCMS is also shut off (S207, S208).

[0046] Figure 5 is a conceptual diagram of control by a mobile device according to one embodiment of the present invention.

[0047] The V2H system can be remotely controlled using a mobile device 30. The mobile device 30 communicates wirelessly with the AVNT (Audio Video Navigation Telematics) 50, and the AVNT 50 can communicate with the VCMS and BMS within the vehicle using CAN communication. Therefore, when a command is transmitted from the mobile device, the AVNT 50 receives the command and transmits it to the VCMS and BMS.

[0048] In one embodiment, a user can remotely control the minimum SOC (State of Charge) setting of battery 100 and the termination of V2H using a mobile device.

[0049] Specifically, since V2H uses the vehicle's battery 100, it is necessary to maintain a minimum battery charge of 100 required for the vehicle to run. Therefore, the user can remotely set the minimum State of Charge (SOC) of battery 100 using a mobile device. In this case, after consuming power using V2H, the system will automatically enter the V2H termination sequence when the user-set battery SOC is reached.

[0050] Furthermore, if a user wants to interrupt the V2H connection while using electricity at home, they can remotely terminate the V2H connection using a mobile device.

[0051] Although specific embodiments of the present invention have been illustrated and described, it will be obvious to those ordinary skill in the art that various improvements and modifications can be made to the present invention without departing from the technical spirit of the invention as provided by the following claims. [Explanation of Symbols]

[0052] 100 vehicle batteries 200 fuses 300 switches 400 Rapid Inlet 500 External controller (V2H) 610 IG3 power supply 630 Charging Door 700 Charge / Discharge Controller (VCMS) 710 MCU 730 VCMS power supply determination section 750 VCMS power supply

Claims

1. A vehicle battery that can be charged and discharged, An external controller that is connected to the vehicle and controls it so that it can exchange power, A switch for connecting / disconnecting the vehicle battery and the external controller, The system includes a charge / discharge controller that, when the vehicle is started or the charging door is opened, controls the switch to close so that the vehicle battery and the external controller are connected, A vehicle charge / discharge control system characterized in that the charge / discharge controller determines whether it is connected to a charger or the external controller after the power supply has been activated, and if it is connected to the charger, it disconnects the switch, and if it is connected to the external controller, it maintains the connection of the switch.

2. The vehicle charge / discharge control system according to Claim 1, characterized in that the power supply to the charge / discharge controller is activated when the vehicle is started or the charging door is opened.

3. The vehicle charge / discharge control system according to claim 1, characterized in that the vehicle battery and the external controller are connected via the vehicle's charging inlet.

4. The vehicle charge / discharge control system according to claim 3, characterized in that the vehicle's charging inlet uses pin 3 of the CHAdeMo charging port.

5. The vehicle charge / discharge control system according to claim 1, characterized in that the charge / discharge controller may include an MCU (Micro Controller Unit), and the switch can also be controlled by a signal from the MCU to close and connect the vehicle battery and the external controller.

6. The vehicle charge / discharge control system according to claim 1, characterized in that the charge / discharge controller controls the system so as to activate only the power supply for the systems related to charge and discharge.

7. The vehicle charge / discharge control system according to Claim 1, characterized in that when the external controller has finished, the charge / discharge controller switches to a power-saving mode in which the switch is cut off and the cable can be disconnected.

8. The vehicle charge / discharge control system according to claim 1, characterized in that the external controller can set a termination command or the minimum State of Charge (SOC) of the battery using a mobile device.

9. The process involves a step in which the power supply to the charge / discharge controller is activated when the vehicle is started or the charging door is opened, The charge / discharge controller connects a switch that is connected between the vehicle battery and the external controller, The step includes supplying power from the vehicle battery to the external controller and activating the power supply of the external controller, A method for controlling the charging and discharging of a vehicle, characterized in that, in the step of connecting a switch, it is determined whether the charge / discharge controller is connected to a charger or the external controller, and if it is connected to a charger, the switch is disconnected, and if it is connected to the external controller, the switch connection is maintained.

10. In the step in which the power supply of the external controller is activated, The vehicle battery and the external controller are connected, and the power from the vehicle battery is supplied to the external controller using pin 3 of the CHAdeMo charging inlet, as described in claim 9.

11. The vehicle charging and discharging control method according to claim 9, characterized in that, in the step of connecting the switch, the charge / discharge controller can also be controlled by an MCU signal to close the switch so that the vehicle battery and the external controller are connected.

12. The vehicle charging and discharging control method according to claim 9, further comprising the step of controlling the charging and discharging controller so that it can activate only the power supply for the systems related to charging and discharging.

13. The vehicle charging and discharging control method according to claim 9, further comprising the step of enabling the external controller to set a termination command or the minimum State of Charge (SOC) of the battery using a mobile device.

Images