Apparatus and method for controlling vehicle-to-vehicle charging

Abstract

An electric vehicle charging control device according to the present invention comprises: a first charging control circuit that controls an EVSE mode for controlling power transmission; a second charging control circuit that controls an EV mode for controlling power reception; a switch that controls switching between the EV mode and the EVSE mode; and a monitoring unit that monitors an on / off state of the switch, wherein, when the switch is in the off state, the first charging control circuit is activated such that the charging control device operates in the EVSE mode, when the switch is in the on state, the second charging control circuit is activated such that the charging control device operates in the EV mode, and the first charging control circuit and the second charging control circuit are connected. According to the electric vehicle charging control device of the present invention, charging between electric vehicles can be controlled with one device, charging can be safely performed even when a charging mode is switched, and the efficiency of a charging speed can be improved through various charging modes.

Description

Vehicle-to-vehicle charging control device and method

[0001] The present invention relates to vehicle-to-vehicle battery charging, and more particularly to vehicle-to-vehicle charging control for electric vehicle batteries.

[0002] Advances in battery, electrical, and electronic technology, and communications technology have significantly improved the performance, efficiency, and user convenience of electric vehicles. Combined with environmental concerns and energy conservation efforts, the proliferation of electric vehicles continues to accelerate. The increased energy density of lithium-ion batteries has increased battery capacity, significantly improving the driving range of electric vehicles.

[0003] In addition, research is underway on charging high-voltage batteries for electric vehicles. International standards for communication between electric vehicle battery charging stations and in-vehicle charging control units, including those related to wired charging, such as CCS, Tesla, and NACS, are also being actively developed.

[0004] Research is actively underway on how to transfer power from the batteries of electric vehicles to charging stations, and research is also actively underway on charging methods that share battery power between electric vehicles.

[0005] Since electric vehicle batteries utilize high-voltage charging, power-related safety management is essential and a critical issue. When charging electric vehicles, especially when sharing battery power and charging between electric vehicles, problems such as charging malfunctions and current leakage between vehicles can quickly lead to major accidents, requiring precise control.

[0006] [Prior Art Literature]

[0007] [Patent Document]

[0008] Korean Patent Publication No. 10-2024-0113325 (January 13, 2023)

[0009] The present invention, taking into account the aforementioned technical challenges, aims to effectively control charging during vehicle-to-vehicle charging. Furthermore, the present invention provides a device and method capable of safely controlling power supply and charging while improving the stability of charging mode switching through control of a vehicle's power supply and charging modes.

[0010] According to the present invention, an electric vehicle charging control device includes a first charging control circuit for controlling an EVSE mode for controlling transmission of power; a second charging control circuit for controlling an EV mode for controlling reception of power; a switch for controlling switching between the EV mode and the EVSE mode; and a monitoring unit for monitoring an on / off state of the switch, wherein when the switch is in an off state (the first charging control circuit is activated), the charging control device operates in an EVSE mode, and when the switch is in an on state (the second charging control circuit is activated), the charging control device operates in an EV mode, and the first charging control circuit and the second charging control circuit can be connected.

[0011] And, when the switch is in the off state, the first charging control circuit can be activated, and when the switch is in the on state, the second charging control circuit can be activated.

[0012] Additionally, at least a portion of the first charging control circuit and the second charging control circuit may include the switch and the charging control unit.

[0013] And, the first charging control circuit further includes a power source and a PWM generation unit, and the PWM generation unit can convert a voltage applied from the power source to generate a PWM signal and transmit the generated PWM signal.

[0014] Additionally, the first charging control circuit can control AC charging and DC charging based on the generated PWM signal.

[0015] In addition, the first charging control circuit further includes a PLC signal generation unit and can control DC charging based on the generated PLC signal.

[0016] In addition, the charging control unit may further include a communication unit that communicates charging control information with the outside when the charging control device operates in EV mode.

[0017] And, the charging control unit can control the switching of the on / off state of the switch.

[0018] Additionally, the inlet may further include a CP port for transmitting and receiving a charge control signal and a Power port for transmitting and receiving power.

[0019] And, when the charging control device operates in the EVSE mode, the PWM signal generated through the CP port can be transmitted.

[0020] In addition, the monitoring unit monitors the on / off status value of the switch, and when the switch is in the off state, the status value of the switch may have a normal state value of 0V.

[0021] In addition, the monitoring unit further monitors the output voltage of the power source, and the output voltage of the power source can have a normal state value of 0 V when the charging control device is in EV mode.

[0022] In addition, the monitoring unit includes a positive voltage detection circuit of the power source,

[0023] The above positive voltage detection circuit may include an ADC (Analog-Digital Converter).

[0024] In addition, the monitoring unit further includes a negative voltage detection circuit of the power source, and the negative voltage detection circuit may include an amplifier and a diode.

[0025] In addition, the monitoring unit may further include a stuck monitoring circuit of the switch, and the stuck monitoring circuit may include a resistor, an amplifier, and a diode connected to the switch.

[0026] And, the charging control unit further includes, and the monitoring unit can transmit a signal to the charging control unit when an abnormal state value is monitored.

[0027] According to the vehicle-to-vehicle charging control device according to the present invention, an error occurring when switching charging modes can be effectively detected, and by detecting an error occurring when switching charging modes, charging can be controlled to minimize risks to charging safety.

[0028] Figure 1 is a conceptual diagram of an electric vehicle and an electric vehicle charging station.

[0029] Figure 2 is a schematic diagram of an electric vehicle battery charging system.

[0030] Figure 3 is a conceptual diagram of electric vehicle-to-electric vehicle charging according to the present invention.

[0031] FIG. 4a is a diagram illustrating a circuit for controlling electric vehicle-to-electric vehicle charging according to the present invention.

[0032] FIG. 4b is a diagram illustrating a circuit for controlling charging in an electric vehicle and charging station system according to the present invention.

[0033] FIG. 5 is a diagram illustrating a circuit for controlling the charging mode of an electric vehicle according to the present invention.

[0034] FIG. 6 is a diagram illustrating the operation of an integrated charging control circuit when an electric vehicle according to the present invention operates in EV mode.

[0035] FIG. 7 is a diagram illustrating the operation of an integrated charging control circuit when an electric vehicle according to the present invention operates in EVSE mode.

[0036] FIG. 8a is a diagram illustrating a voltage value detected according to a charging mode of an electric vehicle according to the present invention.

[0037] FIG. 8b is a diagram illustrating a voltage value detected according to a charging mode of an electric vehicle according to the present invention.

[0038] FIG. 9 is a diagram illustrating a positive voltage detection circuit of an electric vehicle charging control circuit according to the present invention.

[0039] FIG. 10 is a diagram illustrating a negative voltage detection circuit of an electric vehicle charging control circuit according to the present invention.

[0040] FIG. 11 is a diagram illustrating a switch operation detection circuit of an electric vehicle charging control circuit according to the present invention.

[0041] The detailed description of the present invention, which follows, refers to the accompanying drawings, which illustrate specific embodiments in which the present invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the present invention. It should be understood that the various embodiments of the present invention, while different from each other, are not necessarily mutually exclusive. For example, specific shapes, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the present invention.

[0042] Terms that include ordinal numbers, such as "first" and "second," can be used to describe various components, but the components themselves are not limited by these terms. Terms can be used to distinguish one component from another. For example, it should be understood that a "first" component could be referred to as a "second" component, and vice versa.

[0043] Furthermore, it should be understood that the position or arrangement of individual components within each disclosed embodiment may be modified without departing from the spirit and scope of the present invention. Therefore, the following detailed description is not intended to be limiting, and the scope of the present invention, if properly described, is defined solely by the appended claims, along with the full scope equivalents thereof. Similar reference numerals in the drawings designate the same or similar functions throughout the various aspects.

[0044] Figure 1 is a conceptual diagram of an electric vehicle and an electric vehicle charging station. The electric vehicle battery charging system can operate by transmitting and receiving charging control signals, charging control information, and power from an electric vehicle supply equipment (EVSE) to an electric vehicle (EV). As illustrated in Figure 1, the EVSE can be located in a charging station. Furthermore, the EVSE can be located within a home or implemented to be portable. Furthermore, the EVSE can be implemented within an electric vehicle (EV) and can be implemented to perform the function of charging another electric vehicle (EV).

[0045] Figure 2 is a schematic diagram of an electric vehicle battery charging system. The electric vehicle battery charging system may include an EV (10), an EVSE (20), and a connector / inlet (300) connecting the EV (10) and the EVSE (20).

[0046] Referring to FIG. 2, the EV (10) may include an onboard charger (11), a charging control unit (12), a monitoring unit (13), and a battery unit (14).

[0047] The onboard charger (11) can convert the power received from the EVSE (20) to a high-voltage battery and charge the battery when performing slow charging or AC charging of the electric vehicle. In addition, the onboard charger (11) can be implemented to amplify the voltage, rectify it, block high voltage, and perform CAN communication for slow charging or AC charging. In addition, it should be understood that even when performing slow charging or AC charging, the onboard charger (11) may not be used depending on the charging control circuit inside the EV (10).

[0048] The charging control unit (12) can communicate with the MCU (Micro Control Unit) and EVSE (20) inside the vehicle to charge the battery of the electric vehicle, and can generate a charging control signal. Specifically, the MCU inside the vehicle can include components related to battery charging of the electric vehicle, such as a BMS (Battery Management System), a BMU (Battery Management Unit), a CMU (Cell Monitoring Unit), a BMIC (Battery Monitoring Integrated Circuit), a CMM (Cell Management Microcontroller), and a BCU (Battery Control Unit). The charging control unit (12) can receive a charging control signal transmitted from the EVSE (20) and generate information and signals for controlling charging of the electric vehicle. The generated charging control signal of the electric vehicle battery is transmitted to the MCU inside the vehicle, so as to control a precise battery charging process.

[0049] The monitoring unit (13) may be implemented to detect overvoltage, current leakage, abnormal signal generation, circuit separation, etc. when charging the battery of an electric vehicle. For example, it may be configured to detect whether the EVSE (20) and the EV (10) are electrically connected for charging the battery of an electric vehicle, and it may detect whether the EV (10) is connected to the ground for the safety of charging the battery of the electric vehicle.

[0050] The battery unit (14) may be implemented to store power received from the EVSE (20) for charging the battery of an electric vehicle. In addition, it may be implemented to measure SOC (State Of Charge) information indicating the state of the stored power and convert and use the power.

[0051] Referring to FIG. 2, the EVSE (20) may include a power transmission unit (21) and a charging control unit (22). The power transmission unit (21) may transmit power to the EV (10) based on a charging control signal and information. The charging control unit (22) may be implemented to transmit a signal for controlling charging or to start and stop charging through communication with the charging control unit (12) of the EV (10). Communication between the charging control unit (22) of the EVSE (20) and the charging control unit (12) of the EV (10) may be based on a protocol such as CCS (Combined Charging System), GB / T, or NACS, but is not limited thereto. For example, when communication is performed according to the CCS (Combined Charging System) protocol, a charging control signal may be transmitted and received through PLC and PWM communication.

[0052] Referring to FIG. 2, the connector / inlet (30) can connect the communication of power and charging control signals and information between the EVSE (20) and the EV (10). Specifically, it can include a Power port, a Ground port, a CP (Control Pilot) port, and a PD (Proximity Detection) port. The Power port can transmit power transmitted from the EVSE (20) to the EV (10). The CP (Control Pilot) port can transmit a signal for controlling charging, and can be configured to support PLC (Power Line Communication) communication, PWM (Power Width Modulation) communication, and / or CAN (Controller Area Network) communication protocols. The PD port can be configured to detect whether the connector is connected to the inlet.

[0053] Figure 3 is a conceptual diagram of electric vehicle-to-electric vehicle charging according to the present invention. Figures 4a and 4b are diagrams illustrating a circuit for controlling electric vehicle-to-electric vehicle charging according to the present invention.

[0054] Referring to FIG. 3, electric vehicle-to-electric vehicle charging can be performed by connecting a first EV (100) and a second EV (200). The first EV (100) can operate in EVSE mode or V2V (Vehicle to Vehicle) mode, which transmits and / or supplies power. The second EV (200) can operate in EV mode, which transmits and / or receives power. In this specification, the EVSE mode can be referred to as V2V mode or first mode, and the EV mode can be referred to as second mode.

[0055] The first EV (100) may be configured to function to transmit and / or supply power to the second EV (200) and may be configured to function to transmit and / or receive power from the EVSE (20).

[0056] Referring to FIG. 4A, the first EV (100) may operate in EVSE mode, which may transmit and / or supply power to the second EV (200). Accordingly, the first EV (100) may include a circuit (410) for charging control in the EVSE mode. The EVSE mode charging control circuit of the first EV (100) may include a PWM signal generation unit. In the above circuit, Va is the voltage of the pilot wire measured at the output terminal of the first EV (100), and Vg is the internal voltage of the PWM signal generation unit. When the first EV (100) operates in EVSE mode, it may control power transmission and / or supply by transmitting the generated PWM signal to the second EV (200). The first EV (100) may control charging by changing the duty cycle of the PWM signal in the PWM signal generation unit and transmitting it. Additionally, the first EV (100) can control charging more precisely through PLC (Power Line Communication) communication that can communicate through a PWM signal transmission circuit.

[0057] Referring to FIG. 4b, the first EV (100) may operate in EV mode in which it can transmit and / or receive power from the EVSE (20). Accordingly, the first EV (100) may include a circuit (420) for EV mode charging control. The EV mode charging control circuit of the first EV (100) may include a resistor and a switch. In the above circuit, Vb is a voltage, a duty cycle, and a frequency measured by the first EV (100). The EV mode charging control circuit of the first EV (100) may include a switch (S1) connected to the resistor. The magnitude of the voltage detected in the circuit may be controlled by turning the switch (S1) on and off.

[0058] As illustrated in FIGS. 4A and 4B , the first EV (100) may be provided with a circuit for operating in EV mode and EVSE mode. The circuit for operating in EV mode and the charging control circuit for operating in EVSE mode may be provided separately. However, the charging control circuit for operating in EV mode and EVSE mode may be provided as an integrated unit. In this case, the integrated circuit for operating in EV mode and EVSE mode may further include a configuration for switching from EV mode to EVSE mode or from EVSE mode to EV mode.

[0059] A circuit for controlling charging of a first EV (100) operating in an EVSE mode for supplying and / or transmitting power according to one embodiment of the present invention may be provided integrally with a charging control circuit for operating in the EV mode and the EVSE mode. The integrally provided charging control circuit may further include a switch (S) connected to a resistor R5 of a circuit (420) for charging control in the EV mode in order to effectively switch between the EV mode and the EVSE mode. Through the switch (S), the integrally provided charging control circuit can switch modes between the EV mode and the EVSE mode by switching the on / off state of the switch. In addition, by monitoring the on / off state of the switch, an error or abnormality occurring during the switching process between the EV mode and the EVSE mode can be detected.

[0060] FIG. 5 is a diagram illustrating a circuit for controlling a charging mode of an electric vehicle according to the present invention. The circuit for controlling the charging mode of an electric vehicle according to the present invention may be an integrated charging control circuit in which a charging control circuit for operating in EVSE mode and EV mode is integrally provided, as illustrated in FIG. 5. The integrated charging control circuit (500) may include a PMIC (Power Management Integrated Chip) (510), a power source (520), a PWM generation unit (530), a charging control unit (540), and a switch (S). The PMIC (510) is connected to the power source (520) and may control the generation of a PWM signal. The PMIC (510) may apply a first voltage to the power source (520), and the power source (520) may transform the first voltage into a second voltage and output it. The power source (520) can convert the second voltage to a PWM generator (530) to generate a PWM signal and transmit it to a second EV (200) that transmits and / or receives power from the first EV (100). In addition, the power source may further include a PLC generator that generates a separate PLC signal. The PLC generator can control charging through PLC (Power Line Communication) communication. For example, charging control through PLC communication can control charging by bidirectionally communicating signals that control charging for DC charging, rapid charging, and high-speed charging.

[0061] The charging control unit (540), when operating in EVSE mode, can operate to transmit a charging control signal (e.g., a CP signal) to the outside. The charging control unit (540) can be connected to a power source (520) and control the on / off of the power source (520). For example, as illustrated in FIG. 5, the charging control unit (540) can control to transmit voltages of +12 V and -12 V to the PWM generation unit (530) through a GPIO (General Purpose Inlet / Outlet). In addition, the charging control unit (540) can be connected to the PWM generation unit (530) and control to generate a PWM signal. Specifically, the charging control unit can control the generation of the voltage, duty cycle, and frequency of the PWM signal.

[0062] The charging control unit (540), when operating in EV mode, may operate to receive a charging control signal (e.g., a CP signal) from an external source. The charging control unit (540) may receive the voltage, duty cycle, and frequency of the charging control signal. In addition, the charging control unit (540) may receive and communicate the charging control signal through PLC communication and CAN communication. In addition, the charging control unit (540) may further include a communication unit for receiving and / or communicating the charging control signal from an external source. In addition, the charging control unit (540) may monitor and / or control the on / off of the switch (S).

[0063] The switch (S) can be turned on / off so that the corresponding circuit can operate as the integrated charging control circuit (500) operates in EVSE mode or EV mode. The switch (S) can be controlled to be turned on / off by a communication circuit within the vehicle (e.g., CAN communication, PLC communication, etc.). In addition, the switch (S) can be controlled to be turned on / off by the type of object connected to the vehicle inlet, and can be controlled to be turned on / off based on the user's settings. The operation of the integrated charging control circuit (500) according to the on / off of the switch is described in more detail below.

[0064] FIG. 6 is a diagram illustrating the operation of an integrated charging control circuit when an electric vehicle according to the present invention operates in EV mode. FIG. 7 is a diagram illustrating the operation of an integrated charging control circuit when an electric vehicle according to the present invention operates in EVSE mode.

[0065] Referring to FIG. 6, when the electric vehicle according to the present invention operates in EV mode, the integrated charging control circuit (500) can be turned on with the switch (S) turned on. That is, when the switch (S) is turned on, the integrated charging control circuit (500) operates in EV mode. While the integrated charging control circuit (500) operates in EV mode, the power source (520) and the PWM generator (530) do not operate in the off state. On the other hand, a charging control signal (e.g., a CP signal and a PLC signal) from the outside can be received by the charging control unit (540).

[0066] Referring to FIG. 7, when the electric vehicle according to the present invention operates in EVSE mode, the integrated charging control circuit (500) can be turned off with the switch (S) turned off. That is, when the switch (S) is turned off, the integrated charging control circuit (500) operates in EVSE mode. While the integrated charging control circuit (500) operates in EVSE mode, the PMIC (510) applies a first voltage to a power source (520). Thereafter, the power source (520) applies a second voltage to a PWM generator (530), and the PWM generator (530) converts the second voltage to generate a PWM signal. The generated PWM signal can be transmitted to a charging control unit of a second EV (200) or a power receiving device that transmits and / or receives external power. In addition, the integrated charging control circuit (500) may further include a PLC signal generator. The PLC signal generation unit can generate a PLC signal, and the integrated charging control circuit (500) can transmit the generated PLC signal to the charging control unit of the second EV (200) or the power receiving device through the CP port of the connector / inlet (300).

[0067] Referring to FIGS. 6 and 7, the integrated charging control circuit (500) can switch between EV mode and EVSE mode by changing the on / off state of the switch (S). By switching between EV mode and EVSE mode by changing the on / off state of the switch (S), it can have a price advantage over the case where there are modules supporting EV mode and modules supporting EVSE mode, respectively, and control can be made easy since each module is configured on a single board.

[0068] The integrated charging control circuit (500) integrates circuits and modules that control EV mode and EVSE mode into one, enabling switching between modes. Error detection monitoring is required to detect and monitor errors that occur during switching.

[0069] Referring to FIG. 7, when the integrated charging control circuit (500) switches from EV mode to EVSE mode, the integrated charging control circuit (500) can monitor the voltage of the power source (520). Specifically, as described above, in the EV mode, the integrated charging control circuit (500) has the switch (S) turned on, so the power source (520) and the PWM generator (530) are turned off. Accordingly, the voltage detected and monitored by the power source (520) may be 0 V. However, when operating in the EVSE mode, the switch (S) is turned off, so the power source (520) is turned on, and therefore, the positive voltage detection circuit can detect and monitor +12 V, and the negative voltage detection circuit can detect and monitor -12 V.

[0070] Referring to FIG. 7, when the integrated charging control circuit (500) switches from EV mode to EVSE mode, the integrated charging control circuit (500) can monitor the state of the switch (S) connected to the resistor (R5). Specifically, as described above, in EV mode, the switch (S) is in the on state, and in EVSE mode, the switch (S) is in the off state. The integrated charging control circuit (500) can detect and monitor the on / off state of the switch (S). For example, the on / off state of the switch (S) can be detected and monitored through stuck monitoring of the switch (S). Stuck monitoring can detect whether a voltage in the on state and a voltage in the off state, which are predetermined threshold values, are switched through an ADC (Analog-to-Digital Converter).

[0071] A switch (S) according to one embodiment of the present invention can be switched from EV mode to EVSE mode based on a switching signal (e.g., a signal from a control unit such as a BMS or CMU) via communication within the vehicle (e.g., CAN communication). In this case, the integrated charging control circuit (500) can monitor the above-described switch status.

[0072] According to one embodiment of the present invention, the integrated charging control circuit (500) may further include a monitoring unit. The monitoring unit may include a BMU, a CMU, an MCU, and / or a monitoring circuit, and the monitoring unit may monitor the state of a switch (S) and the voltage of a power source.

[0073] According to one embodiment of the present invention, the charging control unit (540) of the integrated charging control circuit (500) may further include a monitoring unit. The monitoring unit may include a BMU, a CMU, an MCU, and / or a monitoring circuit, and the monitoring unit may monitor the state of a switch (S) and the state of a power source.

[0074] In addition, the monitoring unit can monitor the state of the switch (S) and the state of the power source, and when the state of the monitored switch (S) and the state value of the monitored power source (520) do not match the predetermined normal state value of the switch (S) and the predetermined normal state value of the power source (520), the abnormal state value can be transmitted to the charging control unit (540). For example, when the normal state value of the switch (S) in the on state is 2.5 V, when a value of 4 V is monitored, the abnormal state value of 4 V can be transmitted to the charging control unit (540).

[0075] FIG. 8A and FIG. 8B are diagrams illustrating voltage values ​​detected according to the charging mode of an electric vehicle according to the present invention. An integrated charging control circuit (500) according to one embodiment of the present invention can operate by switching from EV mode to EVSE mode by changing the state of a switch (S) from on to off.

[0076] According to one embodiment of the present invention, referring to FIG. 8A, when operating in EV mode, the power source (520) is in an off state, so that 0V can be detected and / or monitored. On the other hand, when operating in EVSE mode, the power source (520) is in an on state, so that +12V and -12V can be monitored and / or detected.

[0077] Referring to FIG. 8B, according to one embodiment of the present invention, the switch (S) is in an on state when operating in EV mode, so that 0 V can be detected and / or monitored. The switch (S) is in an off state when operating in EVSE mode, so that 2.5 V can be detected and / or monitored. It should be understood that the 2.5 V value may vary depending on the configuration of the detection circuit for detecting and / or monitoring the on state of the switch, and that a value other than voltage may be detected.

[0078] In addition, the integrated charging control circuit (500) according to one embodiment of the present invention may further include a monitoring unit. The monitoring unit may monitor the status of the power source (520) and / or the switch (S). The monitoring unit may include a positive voltage detection circuit and a negative voltage detection circuit of the power source (520). The monitoring unit may include a circuit for detecting the operating status of the switch (S).

[0079] Fig. 9 is a diagram illustrating a positive voltage detection circuit of an electric vehicle charging control circuit according to the present invention. Fig. 10 is a diagram illustrating a negative voltage detection circuit of an electric vehicle charging control circuit according to the present invention. Fig. 11 is a diagram illustrating a switch operation detection circuit of an electric vehicle charging control circuit according to the present invention.

[0080] A positive voltage detection circuit of an electric vehicle charging control circuit according to one embodiment of the present invention is a circuit for detecting a positive voltage when the integrated charging control circuit (500) operates in EVSE mode. The positive voltage detection circuit may include an ADC (Analog-Digital Converter) located at one end of the circuit, a capacitor connected to ground, a resistor connected to ground, and a resistor connected to a detection terminal.

[0081] A negative voltage detection circuit of an electric vehicle charging control circuit according to one embodiment of the present invention may include an amplifier circuit. The amplifier circuit may include a diode, a positive voltage, and an amplifier. Specifically, a negative voltage input from the diode and a positive voltage within the circuit may be input to the amplifier, and a negative voltage output from the amplifier may be detected. In addition, the negative voltage detection circuit of an electric vehicle charging control circuit according to one embodiment of the present invention may receive a -12V_Negative signal from one end and monitor a negative voltage from the other end.

[0082] According to an embodiment of the present invention, a switch operation detection circuit of an electric vehicle charging control circuit may include a resistor (S_R3) connected to a switch and an amplifier. When the switch is in an on state, a voltage is applied through the resistor (S_R3) connected to the switch, and the applied voltage is input to the amplifier so that a predetermined voltage value can be monitored. Conversely, when the switch is in an off state, no voltage can be applied through the resistor (S_R3) connected to the switch, so that 0 V can be detected. The resistance value of the resistor (S_R3) connected to the switch may be 2.75 ohms.

[0083] In addition, a switch operation detection circuit of an electric vehicle charging control circuit according to one embodiment of the present invention can receive an on / off control signal of a switch connected to a resistor (S_R3) at one end. One end of the resistor (S_R3) connected to the switch can be connected to a CP (Control Pilot) line.

[0084] Although the detailed description of the invention described above has been described with reference to preferred embodiments of the invention, it should be understood that those skilled in the art can make various modifications and changes to the invention without departing from the spirit and scope of the invention as set forth in the claims.

[0085] [Explanation of symbols]

[0086] 10: EV

[0087] 11: Onboard charger

[0088] 12: Charging control unit

[0089] 13: Monitoring Department

[0090] 14: Battery compartment

[0091] 20: EVSE

[0092] 21: Power transmitter

[0093] 22: Charging control unit

[0094] 30: Connector / Inlet

[0095] 100: 1st EV

[0096] 200: Second EV

[0097] 500: Integrated charge control circuit

[0098] 510: PMIC

[0099] 520: Power source

[0100] 530: PWM generation unit

[0101] 540: Charging control unit

[0102] S: Switch

Claims

1. In an electric vehicle charging control device, A first charging control circuit for controlling an EVSE mode of transmitting power; A second charging control circuit for controlling an EV mode for receiving power; A switch for switching between the EV mode and the EVSE mode; and Includes a monitoring unit that monitors the on / off status of the above switch, When the switch is off, the charging control device operates in EVSE mode, and when the switch is on, the charging control device operates in EV mode. A charging control device in which the first charging control circuit and the second charging control circuit share at least a portion.

2. In paragraph 1, A charging control device in which the first charging control circuit is activated when the switch is in the off state, and the second charging control circuit is activated when the switch is in the on state.

3. In paragraph 1, A charging control device including the switch and the charging control unit, wherein at least a portion of the first charging control circuit and the second charging control circuit are shared.

4. In paragraph 1, The above first charging control circuit, It further includes a power source and a PWM generator, The above PWM generation unit is a charging control device that converts the voltage applied from the power source to generate a PWM signal and transmits the generated PWM signal.

5. In paragraph 4, The above first charging control circuit, A charging control device that controls AC charging and DC charging based on the generated PWM signal.

6. In paragraph 4, The above first charging control circuit, It further includes a PLC signal generation unit, A charging control device that controls DC charging based on the generated PLC signal.

7. In paragraph 1, Further including a charging control unit, A charging control device, wherein the charging control unit further includes a communication unit that communicates charging control information with the outside when the charging control device operates in EV mode.

8. In paragraph 7, The above charging control unit is a charging control device that controls the switching of the on / off state of the switch.

9. In paragraph 1, Including more inlets, The above inlet is a charging control device including a CP port for transmitting and receiving a charging control signal and a Power port for transmitting and receiving power.

10. In paragraph 9, A charging control device that transmits the PWM signal generated through the CP port when the charging control device operates in the EVSE mode.

11. In paragraph 1, The above monitoring unit monitors the on / off status value of the above switch, A charge control device having a normal state value of 0V when the above switch is in the off state.

12. In paragraph 4, The above monitoring unit further monitors the output voltage of the power source, A charging control device, wherein the output voltage of the power source has a steady-state value of 0 V when in EV mode.

13. In paragraph 12, The above monitoring unit, Including a positive voltage detection circuit of the above power source, The above positive voltage detection circuit is a charge control device including an ADC (Analog-Digital Converter).

14. In paragraph 12, The above monitoring unit, Further comprising a negative voltage detection circuit of the power source, The above negative voltage detection circuit is a charge control device including an amplifier and a diode.

15. In paragraph 1, The above monitoring unit, Further comprising a stuck monitoring circuit of the above switch, The above stuck monitoring circuit is a charge control device including a resistor, an amplifier and a diode connected to the switch.

16. In paragraph 1, Further including a charging control unit, The above monitoring unit, A charging control device that transmits a signal to the charging control unit when an abnormal condition value is monitored.

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