Apparatus for controlling charging or discharging of vehicle, system having the same, and method thereof

Abstract

The present invention relates to a charging and discharging control device for a vehicle, a vehicle charging and discharging system including the same, and a method thereof. A charging and discharging control device for a vehicle according to one embodiment of the present invention comprises: a processor for controlling the charging and discharging of electrical energy of a vehicle; and a storage unit for storing data and algorithms driven by said processor. The processor may include sensing the voltage of a PD (Proximity Detection) signal line to determine whether a discharge connector for supplying voltage to the outside of the vehicle or a charging connector for supplying voltage to the inside of the vehicle is connected to a vehicle inlet, and sensing the voltage of a CP (Control Pilot) signal line to determine whether to issue a discharge start command when said discharge connector is connected.

Description

Technology Field

[0001] The present invention relates to a vehicle charge / discharge control device, a vehicle charge / discharge system including the same, and a method thereof. Background Technology

[0002] Plug-in Hybrid Vehicles (PHEVs) and Electric Vehicles (EVs) are powered by electricity charged from an external source. To charge the vehicle from an external charging stand (EVSE: Electric Vehicle Supply Equipment), power lines, CP (Control Pilot, communication), and PD (Proximity Detection) lines are connected.

[0003] As shown in FIG. 1, the power line is connected from the power supply unit of the charging station system (20, EVSE) to the OBC (On Board Charger) of the vehicle system (10). The CP line is a channel for exchanging information between the EVSE and the vehicle, and the control board of the EVSE and the VCMS (Vehicle Charge Management System) are connected. The PD line serves to detect whether the connector of the power supply unit and the inlet of the vehicle are correctly connected.

[0004] The technology for supplying power to the interior and exterior of a vehicle is called V2L (Vehicle to Load) technology. With V2L technology, electric vehicles serve as both power storage and power supply devices, enabling power to be supplied externally during camping or emergencies. For example, electricity for cooking appliances, refrigerators, lighting, and heating devices needed at a campsite can be obtained from the vehicle.

[0005] Conventionally, when supplying power to the outside of the vehicle, the power supply button was mounted on an in-vehicle device, making it inconvenient to supply power to the outside while inside the vehicle.

[0006] In addition, conventionally, when a connector for supplying power to the outside of the vehicle was connected to the inlet, there was a problem in that it was difficult to recognize the closed state of the discharge start button for power supply. The problem to be solved

[0007] Embodiments of the present invention aim to provide a vehicle charge / discharge control device capable of performing discharge by accurately recognizing the closed state of a discharge start button for supplying power to the outside of the vehicle, a vehicle charge / discharge system including the same, and a method thereof.

[0008] The technical problems of the present invention are not limited to those mentioned above, and other unmentioned technical problems will be clearly understood by those skilled in the art from the description below. means of solving the problem

[0009] A charging and discharging control device for a vehicle according to one embodiment of the present invention includes a processor for controlling the charging and discharging of electrical energy of a vehicle; and a storage unit for storing data and algorithms driven by the processor. The processor may include sensing the voltage of a PD (Proximity Detection) signal line to determine whether a discharge connector for supplying voltage to the outside of the vehicle or a charging connector for supplying voltage to the inside of the vehicle is connected to a vehicle inlet, and sensing the voltage of a CP (Control Pilot) signal line to determine whether to issue a discharge start command when the discharge connector is connected.

[0010] In one embodiment, the processor may determine whether the PD sensing voltage sensed by the PD signal line satisfies a first voltage range, and if the first voltage range is satisfied, determine that both the charging connector and the discharging connector are in an unconnected state and do not proceed with charging and discharging.

[0011] In one embodiment, the processor may determine whether the PD sensing voltage satisfies a second voltage range lower than the first voltage range, and if the second voltage range is satisfied, determine that the charging connector is connected and proceed with charging.

[0012] In one embodiment, the processor may determine whether the PD sensing voltage satisfies a third voltage range lower than the second voltage range, and if the third voltage range is satisfied, determine that the discharge connector is connected.

[0013] In one embodiment, the processor may determine whether the level of the CP sensing voltage sensed by the CP signal line has risen above a predetermined value while the PD sensing voltage satisfies the third voltage range, and if it has risen, determine that the discharge start command has been applied and proceed with the discharge.

[0014] In one embodiment, the processor may determine that the charging connector or the discharging connector is connected but the connector latch switch is open when the PD sensing voltage satisfies a fourth voltage range between the first voltage range and the second voltage range, and thus not proceed with charging and discharging.

[0015] In one embodiment, the processor may determine whether the PD sensing voltage satisfies a third voltage range lower than the second voltage range, and if the third voltage range is satisfied, determine that the discharge connector is connected, and if the level of the CP sensing voltage sensed by the CP signal line rises above a predetermined value while the PD sensing voltage satisfies the third voltage range, determine that the discharge start command has been applied and proceed with the discharge.

[0016] In one embodiment, the processor may include determining that the connector latch switch is open and stopping the discharge process when the PD sensing voltage satisfies a fifth voltage range lower than the third voltage range during the discharge process.

[0017] A charging and discharging system of a vehicle according to one embodiment of the present invention may include: a CP circuit that receives a CP (Control Pilot) signal from a charging station system; a PD (Proximity Detection) circuit for determining whether a charging connector or a discharging connector is connected; and a charging and discharging control device that senses the voltage at the output terminal of the PD circuit to determine whether a discharging connector for supplying voltage to the outside of the vehicle or a charging connector for supplying voltage to the inside of the vehicle is connected to the vehicle inlet, and senses the voltage at the output terminal of the CP circuit to determine whether a discharge start command is issued when the discharging connector is connected.

[0018] In one embodiment, the PD circuit may include a resistor element that applies a voltage drop to the power supply voltage of the power supply voltage terminal to the PD signal line.

[0019] In one embodiment, the CP circuit may include: a diode that rectifies the voltage of the CP signal; a resistor connected between the output terminal of the diode and the ground voltage terminal; a first amplifier that amplifies the voltage of the output terminal of the resistor; and a second amplifier that amplifies the output voltage of the first amplifier.

[0020] In one embodiment, the CP circuit may further include first and second buffers that each buffer the output voltage of the second amplifier.

[0021] In one embodiment, it may include a first switch which is a discharge start button, one side of which is connected to the CP circuit and the other side of which is connected to the PD circuit; and a second switch which is a connector latch button and is provided on the other side of the first switch.

[0022] In one embodiment, the discharge connector may further include a first resistor element connected in parallel with the second switch between the ground voltage terminal and the PD signal line connected to the PD circuit; and a second resistor element connected in series between the output terminal of the first resistor element and the second switch and the PD signal line.

[0023] In one embodiment, the discharge connector may further include a first switch, which is a discharge start button, with one side connected to the CP circuit and the other side connected to the PD circuit; and a resistor element connected between the PD signal line of the PD circuit and the ground voltage terminal.

[0024] A charging and discharging control method for a vehicle according to one embodiment of the present invention may include: a step of sensing the voltage of a PD (Proximity Detection) signal line to determine whether a discharge connector for supplying voltage to the outside of the vehicle or a charging connector for supplying voltage to the inside of the vehicle is connected to a vehicle inlet; and a step of sensing the voltage of a CP (Control Pilot) signal line to determine whether to issue a discharge start command when the discharge connector is connected.

[0025] In one embodiment, the step of determining whether the vehicle inlet is connected may include: a step of determining whether the PD sensing voltage sensed by the PD signal line satisfies a first voltage range; and a step of determining that both the charging connector and the discharging connector are unconnected and not proceeding with charging and discharging when the first voltage range is satisfied.

[0026] In one embodiment, the step of determining whether the charging connector is connected to the vehicle inlet may further include: a step of determining whether the PD sensing voltage satisfies a second voltage range lower than the first voltage range; and a step of determining that the charging connector is connected and proceeding with charging if the second voltage range is satisfied.

[0027] In one embodiment, the step of determining whether the vehicle inlet is connected may further include: a step of determining whether the PD sensing voltage satisfies a third voltage range lower than the second voltage range; and a step of determining that the discharge connector is connected if the third voltage range is satisfied.

[0028] In one embodiment, the step of determining whether the discharge start command is applied may include determining whether the level of the CP sensing voltage sensed by the CP signal line has risen above a predetermined value while the PD sensing voltage satisfies the third voltage range, and if it has risen, determining that the discharge start command has been applied and proceeding with the discharge. Effects of the invention

[0029] This technology can perform discharge by accurately recognizing the closed state of the discharge start button for supplying power to the outside of the vehicle.

[0030] In addition, various effects that can be identified directly or indirectly through this document may be provided. Brief explanation of the drawing

[0031] Figure 1 is a configuration diagram of a typical vehicle charging system. FIG. 2 is an overall conceptual diagram of a charging and discharging system of a vehicle according to one embodiment of the present invention. FIG. 3 is a configuration diagram of a charging and discharging system of a vehicle according to one embodiment of the present invention. FIG. 4 is a configuration diagram of a charging and discharging system of a vehicle according to another embodiment of the present invention. FIG. 5 is a detailed configuration diagram of a charge / discharge control device according to one embodiment of the present invention. FIG. 6 is an external view of a discharge connector for external supply of vehicle power according to one embodiment of the present invention. FIG. 7 is an external view of a discharge connector for external supply of vehicle power according to another embodiment of the present invention. FIG. 8 is an example diagram of the PD sensing voltage usage range for determining the connection of a discharge connector for external supply of vehicle power according to one embodiment of the present invention. FIG. 9 is a graph for explaining the process of determining the connection of a charging connector or a discharging connector based on the PD sensing voltage usage range according to one embodiment of the present invention. FIG. 10 is an example diagram of the PD sensing voltage usage range for determining the connection of a discharge connector for external supply of vehicle power according to another embodiment of the present invention. FIG. 11 is a graph for explaining the process of determining the connection of a charging connector or a discharging connector based on the PD sensing voltage usage range according to another embodiment of the present invention. FIG. 12 is a flowchart showing a method for recognizing whether a charging / discharging control device for external supply of vehicle power is connected according to an embodiment of the present invention. FIG. 13 is a flowchart showing a method for recognizing whether a charging / discharging control device for external supply of vehicle power is connected according to an embodiment of the present invention. FIG. 14 illustrates a computing system according to one embodiment of the present invention. Specific details for implementing the invention

[0032] Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that in assigning reference numerals to the components of each drawing, the same components are given the same reference numeral whenever possible, even if they are shown in different drawings. Furthermore, in describing the embodiments of the present invention, if it is determined that a detailed description of related known components or functions would hinder understanding of the embodiments of the present invention, such detailed description is omitted.

[0033] In describing the components of the embodiments of the present invention, terms such as first, second, A, B, (a), (b), etc., may be used. These terms are intended merely to distinguish the components from other components, and the essence, order, or sequence of the components is not limited by the terms. Furthermore, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this application.

[0035] Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 2 to 14.

[0036] The vehicles of the present invention may include all vehicles that use electric energy by charging and discharging, such as electric vehicles.

[0037] FIG. 2 is an overall conceptual diagram of a charging and discharging system of a vehicle according to one embodiment of the present invention.

[0038] Referring to FIG. 2, the vehicle charging and discharging system may include a vehicle system (100) and a discharge connector (200) connected to the vehicle system (100).

[0039] The vehicle system (100) includes a bidirectional OBC (110), a high-voltage battery (120), a vehicle charge / discharge control system (130), an electric cord for the vehicle interior (140), and a charging port inlet (150) for the vehicle exterior.

[0040] The bidirectional OBC (110) can supply electricity from the charging station system to the vehicle or supply power from the vehicle to the outside of the vehicle using electrical energy stored in the vehicle.

[0041] The high-voltage battery (120) can store electrical energy supplied from a charging station.

[0042] The vehicle charge / discharge control system (130) is a Vehicle Charge Management System (VCMS) and is a controller that oversees the charging and discharging of an electric vehicle. The vehicle charge / discharge control system (130) may include a Control Pilot (CP) circuit that exchanges information with an external charging station system and a Proximity Detection (PD) circuit that detects whether the connector and the vehicle's inlet are correctly connected. At this time, the CP signal is a signal that exchanges information about the vehicle between the charging station system and the vehicle system (100). The PD signal is a signal for the function of detecting whether the connector for charging or discharging and the vehicle's inlet are correctly connected.

[0043] The vehicle charging / discharging control system (130) can distinguish whether a slow / fast charging connector is connected to the vehicle charging port inlet (150) for charging electricity to the vehicle, or whether a discharge connector (200) for supplying power to the outside of the vehicle is connected. Additionally, when the discharge connector (200) is connected to the inlet of the vehicle's charging port and the discharge start button (V2L START, S4) is pressed, the vehicle charging / discharging control system (130) can recognize this.

[0044] The electric cord (140) for the vehicle interior is installed in the vehicle interior, so that when electricity is needed in the vehicle interior, a plug of an electric device (e.g., 220VAC plug, 410) can be plugged in and used.

[0045] The vehicle exterior charging port inlet (150) can be connected to a charging connector for supplying voltage to the vehicle or a discharge connector (200) for supplying voltage to the outside of the vehicle.

[0046] The discharge connector (200) acts as a gender between the inlet (150) and the plug (410) of the vehicle's charging port. The discharge connector (200) is intended to supply power from the vehicle to the outside and is also called a V2L (Vehicle to Load) connector. For example, by connecting the discharge connector (200) to the vehicle, electricity for cooking appliances, refrigerators, lights, electric heaters, etc., needed at a campsite can be obtained from the vehicle.

[0047] The discharge connector (200) is configured with 5 pins or 7 pins on one side, such as the charging port inlet (150) of the vehicle, and a plug can be inserted on the other side. Power lines AC1, AC2, GND, and a PD (proximity detection) signal line that detects whether the connector is connected can be connected between the discharge connector (200) and the vehicle charging / discharging control system (130). This will be explained in more detail later with reference to FIGS. 6 and FIGS. 7.

[0049] FIG. 3 is a configuration diagram of a charging and discharging system of a vehicle according to one embodiment of the present invention.

[0050] Referring to FIG. 3, the charging and discharging system of a vehicle includes a charging and discharging control system (131) of the vehicle, a discharge connector (200), and an inlet (300).

[0051] A charging and discharging control system (131) of a vehicle according to one embodiment of the present invention may include a CP circuit (132), a PD circuit (133), and a charging and discharging control device (134).

[0052] The CP circuit (132) may include a diode D11, a resistor R11, a differential amplifier (OP AMP) (111, 112), and a buffer (113, 114). For example, the resistor R11 may be 3.3 kΩ, the amplification value of the differential amplifier (111) may be 0.3 times, and the amplification value of the differential amplifier (112) may be 3 times.

[0053] The PD circuit (133) includes a resistor R12, and the resistor R12 is provided between the power supply voltage 5V and the PD signal line to lower the power supply voltage.

[0054] The CP signal generated by the charging station system, that is, the CP signal for charging, is in the form of a 1kHz PWM in the range of -12V to 12V. In order for the microcomputer (charge / discharge control device (134)) to sense the CP signal for charging, it must be converted to the recognition range of the microcomputer, which is 0 to 5V. Therefore, the charge / discharge control device (131) rectifies the CP signal through diode D1 to convert it to the range of 0 to 12V, then amplifies it by 0.3 times through a differential amplifier (111) (Op-amp) to convert it to the range of 0 to 4V, and then senses the voltage of the CP signal.

[0055] Meanwhile, the frequency and duty of the CP signal are difficult to sense when the CP voltage level is low, such as 2V or less. Accordingly, the charge / discharge control device (131) amplifies the CP signal, which is output after being amplified by 0.3 times from the differential amplifier (111) through the differential amplifier (112), by 3 times to convert it to a range of 0~12V, and then generates a constant voltage level regardless of the input voltage magnitude of the CP signal through each buffer (113, 114) in order to sense the frequency and duty of the CP signal.

[0056] The charge / discharge control device (131) distinguishes between the charge connector of the charging station system and the discharge connector (200) (V2L connector) for external power supply based on the PD circuit (133).

[0057] Additionally, the charge / discharge control device (131) can distinguish the open / closed state of switch S4 through the CP signal line when the discharge connector (200) is connected to the inlet. That is, since the discharge connector (200) does not generate a CP signal, the open / closed state of switch S4 can be distinguished by utilizing the CP signal line. Here, the port that detects the state of switch S4, which is the discharge start button of the discharge connector (200), is called V2L START sensing.

[0058] The discharge connector (200) may include resistors R13, R14, and switches S3, S4. For example, R13 may be 62Ω and R14 may be 430Ω.

[0059] Switch S3 is a connector latch button used for connecting the connector. When Switch S3 is closed while the connector is connected, it can be determined that the charging connector for charging is connected.

[0060] Switch S3 and resistor R14 are connected in parallel, with one side connected to the ground voltage terminal and the other side connected to one side of resistor R13. The other side of resistor R13 is connected to the PD signal line.

[0061] Switch S4 is a button to start power supply (discharge) to the outside of the vehicle. Switch S4 can be connected between the CP signal line and the PD signal line.

[0062] The inlet (300) includes a resistor R15 for diagnosing a disconnection of the PD signal line between the inlet (300) and the vehicle charge / discharge control system (131). The resistor R15 can be connected between the PD signal line and the ground voltage terminal. For example, the resistor R15 can be 2.7KΩ.

[0063] In the open state of S4, the PD sensing voltage changes depending on whether S3 is open or closed, and the charge / discharge control device (134) can determine whether the charge connector or the discharge connector is connected based on the change in the PD sensing voltage. Additionally, the charge / discharge control device (134) can determine the open / closed state of the discharge start button by sensing the voltage of the CP signal line that changes according to the open / closed state of the discharge start button (S4) based on the CP circuit (131) line.

[0065] FIG. 4 is a configuration diagram of a charging and discharging system of a vehicle according to another embodiment of the present invention.

[0066] Referring to FIG. 4, the vehicle's charging and discharging system includes the vehicle's charging and discharging control system (1311), a discharge connector (201), and an inlet (301).

[0067] A charging and discharging control system (1311) of a vehicle according to one embodiment of the present invention may include a CP circuit (1312), a PD circuit (1313), and a charging and discharging control device (1314).

[0068] The CP circuit (132) may include a diode D12, a resistor R101, and a differential amplifier (OP AMP) (115, 116). For example, the resistor R101 may be 3.3 kΩ, the amplification value of the differential amplifier (111) may be 0.3 times, and the amplification value of the differential amplifier (112) may be 3 times.

[0069] The PD circuit (1313) includes a resistor R102, and the resistor R102 is provided between the power supply voltage 5V and the PD signal line to lower the power supply voltage.

[0070] The discharge connector (201) may include a resistor R103 and a switch S4. For example, R103 may be 75Ω. The switch S4 is a button for starting power supply (discharge) to the outside of the vehicle. The switch S4 may be connected between the CP signal line and the PD signal line.

[0071] The inlet (300) includes a resistor R104 for diagnosing a disconnection of the PD signal line between the inlet (300) and the vehicle charge / discharge control system (131). The resistor R104 can be connected between the PD signal line and the ground voltage terminal. For example, the resistor R104 can be 2.7KΩ.

[0073] FIG. 5 is a detailed configuration diagram of a charge / discharge control device (134) according to an embodiment of the present invention. FIG. 5 shows only the charge / discharge control device (134) of FIG. 3, but the detailed configuration of the charge / discharge control device (1314) of FIG. 4 is the same.

[0074] A charge / discharge control device (134) for external supply of vehicle power according to one embodiment of the present invention may be implemented inside a vehicle, may be implemented integrally with the internal control units of the vehicle, or may be implemented separately.

[0075] Referring to FIG. 5, the charge / discharge control device (134) includes a sensing unit (135), a storage unit (136), and a processor (137).

[0076] The sensing unit (135) can sense the voltage of the CP signal, the frequency of the CP signal, the duty cycle of the CP signal, the open / closed state of the discharge start button (S4), the voltage of the PD signal, etc., during charging.

[0077] The storage unit (136) may store data and algorithms driven by the processor (137). As an example, the storage unit (136) may store a voltage level range of a PD signal for determining whether the discharge connector (200) and the inlet (300) are connected and whether the discharge start button is started. The voltage level range of the PD signal will be explained in detail later through FIGS. 10 and FIGS. 12.

[0078] The storage unit (136) may include memory of a flash memory type, hard disk type, micro type, and card type (e.g., SD card (Secure Digital Card) or XD card (eXtream Digital Card)), and at least one type of storage medium among memory of a RAM (Random Access Memory), SRAM (Static RAM), ROM (Read-Only Memory), PROM (Programmable ROM), EEPROM (Electrically Erasable PROM), magnetic memory (MRAM, Magnetic RAM), magnetic disk, and optical disk type.

[0079] The processor (137) can be electrically connected to the sensing unit (135), storage unit (136), etc., and can electrically control each component and can be an electrical circuit that executes software commands, thereby performing various data processing and calculations described later.

[0080] The processor (137) can process signals transmitted between each component of the vehicle charging and discharging control system (131). The processor (137) may be, for example, a controller such as an ECU (Engine Control Unit), TCU (Transmission Control Unit), BMS (Battery Management System), or MCU (Motor Control Unit) installed in the vehicle.

[0081] The processor (137) can sense the voltage of the PD signal line to determine whether a discharge connector for supplying voltage to the outside of the vehicle or a charging connector for supplying voltage to the inside of the vehicle is connected to the vehicle inlet. Additionally, the processor (137) can sense the voltage of the CP signal line to determine whether the discharge start button (S4) is closed when the discharge connector (200) is connected, thereby determining whether a discharge start command has been applied.

[0082] The processor (137) determines whether the PD sensing voltage sensed by the PD signal line satisfies a first voltage range, and if it satisfies the first voltage range, determines that both the charging connector and the discharging connector (200) are unconnected and does not proceed with charging and discharging. For example, the first voltage range may be 3.5 V or higher and less than 4.7 V or 4.0 V or higher and less than 4.7 V.

[0083] The processor (137) determines whether the PD sensing voltage satisfies a second voltage range lower than the first voltage range, and if it satisfies the second voltage range, determines that the charging connector is connected and can proceed with charging. For example, the second voltage range may be 1.2V or higher and less than 2.0V or 1.0V or higher and less than 4.0V.

[0084] The processor (137) determines whether the PD sensing voltage satisfies a third voltage range lower than the second voltage range, and if it satisfies the third voltage range, it can determine that the discharge connector is connected. For example, the third voltage range may be 0.1V or more and less than 1.2V or 0.1V or more and less than 1.0V.

[0085] The processor (137) determines whether the level of the CP sensing voltage sensed by the CP signal line has risen above a predetermined value when the PD sensing voltage satisfies the third voltage range, and if it has risen, determines that a discharge start command has been applied and proceeds with the discharge. For example, the CP sensing voltage may be 0V before the discharge start command is applied and rise to 0.34V after the discharge start command is applied. Also, the CP sensing voltage may be 0V before the discharge start command is applied and rise to 0.4V after the discharge start command is applied.

[0086] When the PD sensing voltage satisfies a fourth voltage range between a first voltage range and a second voltage range, the processor (137) determines that the charging connector or the discharging connector (200) is connected but the connector latch switch (S3) is open, and thus may not proceed with charging and discharging. For example, the fourth voltage range may be 2.0V or higher and less than 3.5V.

[0087] The processor (137) can stop the discharge process by determining that the connector latch switch (S3) is open when the PD sensing voltage satisfies a fifth voltage range that is lower than the third voltage range during the discharge process. For example, the fifth voltage range may be 2.0V or higher and less than 3.5V.

[0089] FIG. 6 is an external view of a discharge connector for external supply of vehicle power according to one embodiment of the present invention.

[0090] Referring to FIG. 6, the discharge connector (200) for external supply of vehicle power includes a connection part (601) connected to a plug on one side of the body, a connection part (602) connected to an inlet of the vehicle's charging port on the opposite side of the connection part (601), a connector latch button (S3), and a discharge start button (S4).

[0091] FIG. 7 is an external view of a discharge connector for external supply of vehicle power according to another embodiment of the present invention. Referring to FIG. 7, the connector includes a connection part (701) connected to a plug on one side of the body, a connection part (702) connected to an inlet of the vehicle's charging port on the opposite side of the connection part (701), and a discharge start button (S4). As such, the discharge connector (200) according to another embodiment of the present invention does not include a connector latch button (S3).

[0093] FIG. 8 is an example diagram of the PD sensing voltage usage range for determining the connection of a discharge connector for external supply of vehicle power according to one embodiment of the present invention.

[0094] Referring to FIG. 8, the usage range of the PD sensing voltage is divided into PD disconnection, charging connector removal, charging connector connection and opening of the connector latch button (S3), charging connector connection and S3 closing, discharge connector (V2L connector) usage area, and GND short circuit.

[0095] The charge / discharge control device (134) can determine that if the control PD sensing voltage is 4.7V to 5V, the PD is disconnected; if it is 3.5V to 4.7V, the charging connector is disconnected; if it is 2.0V to 3.5V, the charging connector is connected and the connector latch button (S3) is opened; if it is 1.2V to 2.0V, the charging connector is connected and S3 is closed; if it is 0.1V to 1.2V, the discharge connector (V2L connector) is used; and if it is 0V to 0.1V, the GND is short-circuited.

[0097] FIG. 9 is a graph for explaining the process of determining the connection of a charging connector or a discharging connector based on the PD sensing voltage usage range according to one embodiment of the present invention.

[0098] Referring to Fig. 9, when the charging connector of the charging station system is not connected to the inlet, the PD sensing voltage is sensed as a value between 3.5 and 4.7V, and neither charging nor V2L proceeds. When the charging connector is connected and S3 is open, the PD sensing voltage is sensed as a value between 2.0V and 3.5V, and neither charging nor V2L proceeds.

[0099] When the charging connector is connected and S3 is in a closed state, the charging / discharging control device (134) can determine whether it is a charging connector or a discharging connector based on the level of the PD sensing voltage.

[0100] That is, the charge / discharge control device (134) can determine that the charging connector is connected if the PD sensing voltage is between 1.2 and 2.0V, and determine that the discharge connector (V2L dedicated connector) is connected if the PD sensing voltage is between 0.1 and 1.2V.

[0101] After the discharge connector (V2L dedicated connector) is connected, when the discharge start button (V2L START) is pressed and S4 is closed, the PD sensing voltage does not change, and the discharge start button (V2L START) sensing voltage rises from 0V to 0.34V through the CP signal line.

[0102] Referring to FIG. 3, when the discharge connector (200) is unconnected and the V2L START sensing voltage is 0V or the switch S4 is closed, the discharge start button sensing voltage rises through the resistors and differential amplifiers (111, 112), etc., as shown in Equation 1 below.

[0103]

[0104] At this time, the values ​​of resistors R11 and R15 are ignored because they are much larger than those of R12 and R13. V represents the applied voltage of 5V, and the amplification value represents the amplification value of the differential amplifier (111, 112). For example, if the amplification values ​​of the differential amplifier (111, 112) are 0.3 and 3, respectively, 0.3 and 3 are multiplied respectively.

[0105] As such, when the voltage sensing the discharge start button rises, the discharge begins, and when S3 is opened during the discharge, the PD sensing voltage changes to 2.77V, causing the discharge to stop. After that, when S4 is opened to end the discharge, the discharge ends.

[0107] FIG. 10 is an example diagram of the PD sensing voltage usage range for determining the connection of a discharge connector for external supply of vehicle power according to another embodiment of the present invention.

[0108] Referring to Fig. 10, the usage range of the PD sensing voltage is divided into PD disconnection, charging connector removal, charging connector connection, discharge connector (V2L connector) usage area, and GND short circuit.

[0109] The charge / discharge control device (1314) can determine that if the control PD sensing voltage is 4.7V to 5V, the PD is disconnected; if it is 4.0V to 4.7V, the charging connector is disconnected; if it is 1.0V to 4.0V, the charging connector is connected; if it is 0.1V to 1.0V, the discharge connector (V2L connector) is used; and if it is 0V to 0.1V, the GND is short-circuited.

[0110] FIG. 11 is a graph for explaining the process of determining the connection of a charging connector or a discharging connector based on the PD sensing voltage usage range according to another embodiment of the present invention.

[0111] Referring to FIG. 11, the charge / discharge control device (1314) senses a PD sensing voltage between 4.0 and 4.7V when the charging connector is not connected to the inlet, and does not proceed with both charging and V2L.

[0112] The charge / discharge control device (1314) can determine whether it is a charge connector or a discharge connector based on the level of the PD sensing voltage when the charge connector is connected to the inlet.

[0113] That is, the charge / discharge control device (1314) can determine that the charging connector is connected when a PD sensing voltage of 1.0 to 4.0V is sensed, and the discharging connector is connected when a PD sensing voltage of 0.1 to 1.0V is sensed.

[0114] When the discharge start button is pressed and S4 is closed, the charge / discharge control device (1314) has no change in PD sensing voltage and the discharge start button (V2L START) sensing voltage rises from 0V to 0.4V through the CP signal line.

[0115] Accordingly, the charge / discharge control device (1314) proceeds with the discharge, and when S4 is opened, the discharge is terminated.

[0117] Hereinafter, with reference to FIG. 12, a method for recognizing whether a charge / discharge control device for external supply of vehicle power is connected according to an embodiment of the present invention will be described in detail. FIG. 12 is a flowchart illustrating a method for recognizing whether a charge / discharge control device for external supply of vehicle power is connected according to an embodiment of the present invention.

[0118] In the following description, it is assumed that the charge / discharge control device (134) for external supply of vehicle power of FIG. 5 performs the process of FIG. 12. Additionally, in the description of FIG. 12, the operation described as being performed by the device can be understood as being controlled by the processor (137) of the charge / discharge control device (134) for external supply of vehicle power.

[0119] Referring to FIG. 12, the charge / discharge control device (134) determines whether the voltage of the PD signal line, i.e., the PD sensing voltage (Vpd), satisfies a predetermined connector disconnection criterion condition (B or greater, less than A) (S101), and if satisfied, determines that the connector is not connected and does not proceed with charging and discharging (V2L) (S102). For example, A may be 4.7V and B may be 3.5V.

[0120] Meanwhile, if the PD sensing voltage (Vpd) does not satisfy the connector disconnection criteria condition, the charge / discharge control device (134) determines whether the PD sensing voltage (Vpd) satisfies the connector connection and S3 open condition (C or greater, less than B) (S103), and if satisfied, determines that the connector is connected and S3 is open and does not proceed with charging and discharging (V2L) (S104). For example, C may be 2.0V.

[0121] Meanwhile, if the PD sensing voltage (Vpd) does not satisfy the connector connection and S3 open conditions, the charge / discharge control device (134) determines whether the connector connection and S3 closed conditions (greater than D and less than C) are satisfied (S105), and if satisfied, the charging connector is connected and the S3 closed state is determined (S106). For example, D can be 1.2V.

[0122] Meanwhile, if the PD sensing voltage (Vpd) does not satisfy the connector connection and S3 closed conditions, the charge / discharge control device (134) determines whether the discharge connector usage condition (E or greater, less than D) is satisfied (S107), and if satisfied, determines the connection state of the discharge connector (V2L connector). For example, E may be 0.1V.

[0123] Next, the charge / discharge control device (134) determines whether the discharge start button voltage (V2L START) has occurred (increased) (S109), and if the discharge start button voltage (V2L START) has occurred, it determines that the discharge start button has been pressed and S4 has been closed, and starts the discharge (V2L) (S110).

[0124] The charge / discharge control device (134) determines whether the PD sensing voltage (Vpd) during discharge satisfies the connector connection and S3 open conditions (C or greater, less than B) (S111), and if satisfied, determines that S3 has changed to an open state and stops the discharge (V2L) progress (S112).

[0126] Hereinafter, with reference to FIG. 13, a method for recognizing whether a charge / discharge control device for external supply of vehicle power is connected according to another embodiment of the present invention will be described in detail. FIG. 13 is a flowchart illustrating a method for recognizing whether a charge / discharge control device for external supply of vehicle power is connected according to another embodiment of the present invention.

[0127] In the following, it is assumed that the charge / discharge control device (134) for external supply of vehicle power in FIG. 5 performs the process of FIG. 13. Additionally, in the description of FIG. 13, the operation described as being performed by the device can be understood as being controlled by the processor of the charge / discharge control device (1314) for external supply of vehicle power.

[0128] Referring to FIG. 13, the charge / discharge control device (1314) determines whether the voltage of the PD signal line, i.e., the PD sensing voltage (Vpd), satisfies a predetermined connector disconnection criterion condition (G or greater, less than F) (S201), and if satisfied, determines that the connector is not connected and does not proceed with charging and discharging (V2L) (S202). For example, A may be 4.7V and B may be 4.0V.

[0129] Meanwhile, if the PD sensing voltage (Vpd) does not satisfy the connector disconnection criteria condition, the charge / discharge control device (1314) determines whether the PD sensing voltage (Vpd) satisfies the connector connection condition (H or greater, less than G) (S203), and if satisfied, determines the charging connector connection state (S204). For example, H can be 1.0V.

[0130] Meanwhile, if the PD sensing voltage (Vpd) does not satisfy the connector connection condition, the charge / discharge control device (1314) determines whether the discharge connector usage condition (I or greater, less than H) is satisfied (S205), and if satisfied, determines the connection state of the discharge connector (V2L connector) (S206). For example, I can be 0.1V.

[0131] Next, the charge / discharge control device (1314) determines whether the discharge start button voltage (V2L START) has occurred (increased) (S207), and if the discharge start button voltage (V2L START) has occurred, it determines that the discharge start button has been pressed and S4 has been closed, and starts the discharge (V2L) (S208).

[0132] The charge / discharge control device (1314) stops the discharge (V2L) process when S4 is opened (S209).

[0133] In this way, the present invention provides a discharge start button (S4) on a discharge connector for supplying power to the outside of the vehicle, so that discharge (power supply) can be started from the outside of the vehicle using the button (S4) of the discharge connector without using a separate button inside the vehicle.

[0134] In addition, the present invention can recognize the connection of a discharge connector for supplying power to the outside of the vehicle without changing the existing PD circuit and CP circuit used for charging, and can easily recognize the on / off of the discharge start button.

[0136] FIG. 14 illustrates a computing system according to one embodiment of the present invention.

[0137] Referring to FIG. 14, the computing system (1000) may include at least one processor (1100), memory (1300), user interface input device (1400), user interface output device (1500), storage (1600), and network interface (1700) connected via a bus (1200).

[0138] The processor (1100) may be a semiconductor device that executes processing on instructions stored in a central processing unit (CPU) or in memory (1300) and / or storage (1600). The memory (1300) and storage (1600) may include various types of volatile or non-volatile storage media. For example, the memory (1300) may include ROM (Read Only Memory, 1310) and RAM (Random Access Memory, 1320).

[0139] Accordingly, steps of the method or algorithm described in connection with the embodiments disclosed herein may be directly implemented in hardware, software modules, or a combination of both, executed by the processor (1100). The software modules may reside in storage media such as RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disks, removable disks, CD-ROMs (i.e., memory (1300) and / or storage (1600)).

[0140] An exemplary storage medium is coupled to a processor (1100), and the processor (1100) can read information from the storage medium and write information to the storage medium. Alternatively, the storage medium may be integrated with the processor (1100). The processor and the storage medium may reside within an application-specific integrated circuit (ASIC). The ASIC may reside within a user terminal. Alternatively, the processor and the storage medium may reside as separate components within the user terminal.

[0141] The above description is merely an illustrative explanation of the technical concept of the present invention, and those skilled in the art to which the present invention pertains will be able to make various modifications and variations within the scope of the essential characteristics of the present invention.

[0142] Accordingly, the embodiments disclosed in this invention are intended to illustrate, not limit, the technical concept of the invention, and the scope of the technical concept of the invention is not limited by these embodiments. The scope of protection of this invention shall be interpreted by the claims below, and all technical concepts within an equivalent scope shall be interpreted as being included within the scope of rights of this invention.

Claims

Claim 1 A processor that controls the charging and discharging of electrical energy of a vehicle;and includes a storage unit in which data and algorithms driven by the processor are stored, wherein the processor senses the voltage of a PD (Proximity Detection) signal line to determine whether a discharge connector for supplying voltage to the outside of the vehicle or a charging connector for supplying voltage to the inside of the vehicle is connected to a vehicle inlet, and senses the voltage of a CP (Control Pilot) signal line to determine whether to issue a discharge start command by detecting the voltage of the CP signal line, which changes according to the open or closed state of the switch of the discharge connector when the discharge connector is connected, wherein the discharge start command is applied when the switch of the discharge connector is determined to be in a closed state and power can be discharged to the outside of the vehicle, wherein the discharge start command is applied when the switch of the discharge connector is determined to be in a closed state and power can be discharged to the outside of the vehicle, and determines whether the PD sensing voltage sensed by the PD signal line satisfies a first voltage range, and if the first voltage range is satisfied, determines that both the charging connector and the discharge connector are in an unconnected state and does not proceed with charging and discharging, and wherein the PD sensing A charging and discharging control device for a vehicle, characterized by determining whether the voltage satisfies a second voltage range lower than the first voltage range, and if the second voltage range is satisfied, determining that the charging connector is connected and proceeding with charging; determining whether the PD sensing voltage satisfies a third voltage range lower than the second voltage range, and if the third voltage range is satisfied, determining that the discharge connector is connected; and if the PD sensing voltage satisfies a fourth voltage range between the first voltage range and the second voltage range, determining that the charging connector or the discharge connector is connected but the connector latch switch is open, and not proceeding with charging and discharging. Claim 2 delete Claim 3 delete Claim 4 delete Claim 5 A charging and discharging control device for a vehicle according to claim 1, wherein the processor determines whether the level of the CP sensing voltage sensed by the CP signal line has risen above a predetermined value while the PD sensing voltage satisfies the third voltage range, and if it has risen, determines that the discharge start command has been applied and proceeds with the discharge. Claim 6 delete Claim 7 A charging and discharging control device for a vehicle according to claim 1, wherein the processor determines whether the PD sensing voltage satisfies a third voltage range lower than the second voltage range, determines that the discharge connector is connected if the third voltage range is satisfied, and determines that the discharge start command is applied and proceeds with the discharge if, while the PD sensing voltage satisfies the third voltage range, the level of the CP sensing voltage sensed by the CP signal line rises above a predetermined value. Claim 8 A charging and discharging control device for a vehicle according to claim 7, wherein the processor determines that the connector latch switch is open and stops the discharge process when the PD sensing voltage satisfies a fifth voltage range lower than the third voltage range during the discharge process. Claim 9 CP circuit receiving a CP (Control Pilot) signal from a charging station system; PD (Proximity Detection) circuit for determining whether a charging connector or a discharging connector is connected; and by sensing the voltage at the output terminal of the PD circuit, it is determined whether a discharge connector for supplying voltage to the outside of the vehicle or a charging connector for supplying voltage to the inside of the vehicle is connected to the vehicle inlet; and by sensing the voltage at the output terminal of the CP circuit, when the discharge connector is connected, the voltage of the CP signal line, which changes according to the open or closed state of the switch of the discharge connector, is detected to determine whether a discharge start command is issued, wherein the discharge start command is applied when the switch of the discharge connector is determined to be in a closed state, thereby allowing power to be discharged to the outside of the vehicle; and by determining whether the PD sensing voltage sensed by the PD signal line satisfies a first voltage range, and if the first voltage range is satisfied, both the charging connector and the discharge connector are determined to be in an unconnected state, and charging and discharging are not performed, characterized in that; and by determining whether the PD sensing voltage satisfies a second voltage range lower than the first voltage range, and if the second voltage range is satisfied, the charging connector is determined to be in a disconnected state and charging is performed, and when the PD sensing voltage is lower than the second voltage range A charging and discharging system for a vehicle, characterized by including a charging and discharging control device that determines whether a third voltage range is satisfied and, if the third voltage range is satisfied, determines that the discharge connector is in a connected state, and, if the PD sensing voltage satisfies a fourth voltage range between the first voltage range and the second voltage range, determines that the charging connector or the discharge connector is connected but the connector latch switch is in an open state, thereby not proceeding with charging and discharging. Claim 10 A charging and discharging system for a vehicle according to claim 9, wherein the PD circuit comprises a resistor element that lowers the power supply voltage of the power supply voltage terminal and applies it to the PD signal line. Claim 11 A charging and discharging system for a vehicle according to claim 9, wherein the CP circuit comprises: a diode that rectifies the voltage of the CP signal; a resistor element connected between the output terminal of the diode and the ground voltage terminal; a first amplifier that amplifies the voltage of the output terminal of the resistor element; and a second amplifier that amplifies the output voltage of the first amplifier. Claim 12 A charging and discharging system for a vehicle according to claim 11, wherein the CP circuit further comprises first and second buffers that each buffer the output voltage of the second amplifier. Claim 13 A charging and discharging control system for a vehicle according to claim 12, further comprising: a first switch which is a discharge start button, one side of which is connected to the CP circuit and the other side of which is connected to the PD circuit; and a discharge connector which includes a second switch which is provided on the other side of the first switch and is a connector latch button. Claim 14 A charging and discharging control system for a vehicle according to claim 13, wherein the discharge connector further comprises: a first resistor element connected in parallel with the second switch between a ground voltage terminal and a PD signal line connected to the PD circuit; and a second resistor element connected in series between the output terminal of the first resistor element and the second switch and the PD signal line. Claim 15 A charging and discharging system for a vehicle according to claim 11, wherein the discharge connector further comprises: a first switch, which is a discharge start button, with one side connected to the CP circuit and the other side connected to the PD circuit; and a resistor element connected between the PD signal line of the PD circuit and the ground voltage terminal. Claim 16 A step of determining whether a discharge connector for supplying voltage to the outside of the vehicle or a charging connector for supplying voltage to the inside of the vehicle is connected to a vehicle inlet by sensing the voltage of a PD (Proximity Detection) signal line; and a step of determining whether to issue a discharge start command by sensing the voltage of the CP (Control Pilot) signal line and detecting the voltage of the CP signal line that changes according to the open or closed state of the switch of the discharge connector when the discharge connector is connected, wherein the discharge start command is applied when the switch of the discharge connector is determined to be in a closed state and power can be discharged to the outside of the vehicle; wherein the step of determining whether to be connected to the vehicle inlet includes: a step of determining whether the PD sensing voltage sensed by the PD signal line satisfies a first voltage range; and a step of determining that if the first voltage range is satisfied, both the charging connector and the discharge connector are in an unconnected state and not proceeding with charging and discharging; and a step of determining whether the PD sensing voltage satisfies a second voltage range lower than the first voltage range. A method for controlling charging and discharging of a vehicle, characterized by further comprising: a step of determining that the charging connector is connected and proceeding with charging when the second voltage range is satisfied; a step of determining whether the PD sensing voltage satisfies a third voltage range lower than the second voltage range, and determining that the discharge connector is connected when the third voltage range is satisfied; and a step of determining that the charging connector or the discharge connector is connected but the connector latch switch is open when the PD sensing voltage satisfies a fourth voltage range between the first voltage range and the second voltage range, and not proceeding with charging and discharging. Claim 17 delete Claim 18 delete Claim 19 A method for controlling the charge and discharge of a vehicle according to claim 16, wherein the step of determining whether the vehicle inlet is connected further comprises: a step of determining whether the PD sensing voltage satisfies a third voltage range lower than the second voltage range; and a step of determining that the discharge connector is connected when the third voltage range is satisfied. Claim 20 A method for controlling the charge and discharge of a vehicle according to claim 19, wherein the step of determining whether a discharge start command is applied includes the step of determining whether the level of the CP sensing voltage sensed by the CP signal line has risen above a predetermined value while the PD sensing voltage satisfies the third voltage range, and if it has risen, determining that the discharge start command has been applied and proceeding with the discharge.

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