Electric vehicle charging controller

Abstract

To provide a highly compatible electric vehicle charging controller.SOLUTION: An electric vehicle charging controller comprises: a switch device which is connected, via a signal line, to a signal detection device of an electric vehicle power supply device, and generates a charging enable signal and transmits the same to the signal detection device; and a control unit which controls the switch device. The signal detection device comprises a first resistance disposed on the signal line. The switch device comprises: a first signal unit which comprises a first switching element, and generates a charging enable signal by turning on the first switching element on the basis of a first switching signal among the plurality of switching signals; and a second signal unit which comprises a second switching element, and generates the charging enable signal by turning on the second switching element on the basis of a second switching signal among the plurality of switching signals, wherein the first signal unit or the second signal unit generates the charging enable signal according to a resistance value of the first resistance.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The embodiments relate to an electric vehicle charging controller.

Background Art

[0002] Environmentally friendly vehicles such as electric vehicles (EVs) or plug-in hybrid electric vehicles (PHEVs) utilize electric vehicle supply equipment (EVSE) installed at charging stations for battery charging. For this purpose, an electric vehicle charging controller (EVCC) is installed in the EV and communicates with the EV and the EVSE to control the charging of the electric vehicle.

[0003] For example, if the EVCC receives a signal instructing the start of charging from the electric vehicle, it can control to start charging, and if it receives a signal instructing the end of charging from the electric vehicle, it can control to end charging.

[0004]

[0005] The charging method of an electric vehicle can be classified into rapid charging and slow charging according to the charging time. In the case of rapid charging, the battery is charged by the direct current supplied from the charger, and in the case of slow charging, the battery is charged by the alternating current supplied to the charger. Therefore, the charger used for rapid charging is called a rapid charger or a direct current charger, and the charger used for slow charging is called a slow charger or an alternating current charger.

[0006] The electric vehicle power supply device and the electric vehicle perform multi-stage charging while monitoring safety. sequence. The electric vehicle power supply device and the electric vehicle transmit and receive signals according to a charging sequence through a plurality of signal lines. Since high-voltage power is used for charging the electric vehicle, high accuracy is required for the signals transmitted and received along the signal lines. When a part of the circuit is changed due to improvement of the charging system and the magnitude of the signal is changed, etc., the charging sequence is not executed. Therefore, every time the charging system is improved, there arises a problem that the improved circuit must be applied to the changed parts. SUMMARY OF THE INVENTION PROBLEMS TO BE SOLVED BY THE INVENTION

[0007] An embodiment is for providing a highly compatible electric vehicle charging controller.

[0008] An embodiment is for providing an electric vehicle charging controller capable of detecting the connection state of signal lines between an electric vehicle power supply device and an electric vehicle charging controller.

[0009] The problems to be solved by the embodiment are not limited to this, and it can be said that the problems solving means and the objects and effects that can be grasped from the embodiments described below are also included. MEANS FOR SOLVING THE PROBLEMS

[0010] The electric vehicle charging controller according to an embodiment of the present invention is connected to a signal sensing device of an electric vehicle power supply device through a signal line, generates a charging permission signal, and transmits it to the signal sensing device switching device; and a control for controlling the switching device through a plurality of switching signals including a part;, the signal sensing device of the electric vehicle power supply device is arranged on the signal line including a first resistor, the switching device includes a first switching element, and among the plurality of switching Based on the first switching signal among the signals, the first switching element is turned on to generate a first signal part for generating the charging permission signal; and including a second switching element, the Based on the second switching signal among the plurality of switching signals, the second switching element is turned on to generate a second signal part for generating the charging permission signal; the resistance of the first resistor The value causes the first signal part or the second signal part to generate the charging permission signal

[0011] The signal sensing device of the electric vehicle power supply device includes a first resistor arranged on the signal line The switching device can generate the charging permission signal by the first signal part or the second signal part according to the resistance value of the first resistor

[0012] When the resistance value of the first resistor is greater than a first reference value and less than a second reference value, the control unit Turns on the first switching element through the first switching signal, and turns off the second switching element through the second Switching signal to control the first signal part to generate the charging permission signal

[0013] When the resistance value of the first resistor is greater than the second reference value and less than the third reference value, the control unit Turns off the first switching element through the first switching signal, and turns on the second switching element through the second Switching signal to control the second signal part to generate the charging permission signal

[0014] ​​​ The control unit receives the node voltage of the nodes included in the first signal unit or the second signal unit, and can detect the electrical connection state between the electric vehicle power supply device and the electric vehicle according to the magnitude of the node voltage. The control unit can determine that the electrical connection state is an open state when the magnitude of the node voltage is included in the first voltage range. When the magnitude of the node voltage is included in a second voltage range or a fourth voltage range that is greater than the first voltage range, the control unit can determine that the electrical connection state is a poor contact.

[0015] When the magnitude of the node voltage is included in a third voltage range between the second voltage range and the fourth voltage range, the control unit can determine that the electrical connection state is a normal state. When the magnitude of the node voltage is included in a fifth voltage range that is greater than the fourth voltage range, the control unit can determine that the electrical connection state is an overvoltage state.

[0016] The first signal unit may include: a first switching element whose first stage is connected to the first resistor and whose third stage is connected to the control unit; a second resistor whose first stage is connected to the second stage of the first switching element and whose second stage is connected to the ground terminal; a third resistor whose first stage is connected to the second stage of the second resistor; a fourth resistor whose first stage is connected to the second stage of the third resistor and whose second stage is connected to the ground terminal; and a first diode whose cathode terminal is connected to the second stage of the fourth resistor and whose anode terminal is connected to the ground terminal.

[0017]

[0018]

[0019]

[0020] ​​​​​​​​​​​​ The second signal part has its first stage connected to the first resistor and its third stage connected to the control part a second switching element; a fifth resistor with its first stage connected to the second stage of the second switching element and its second stage connected to a ground terminal; a sixth resistor with its first stage connected to the second stage of the fifth resistor; a seventh resistor with its first stage connected to the second stage of the sixth resistor and its second stage connected to the ground terminal; and a second diode with its cathode terminal connected to the second stage of the seventh resistor and its anode terminal connected to the ground terminal; can be included. The second resistor has a resistance value larger than that of the fifth resistor, the third resistor has a resistance value larger than that of the sixth resistor, and the fourth resistor has a resistance value smaller than that of the seventh resistor; can be such that. The cathode terminal of the first diode and the cathode terminal of the second diode can be connected to the control part. The electric vehicle charging controller according to an embodiment of the present invention is a switch device connected through a signal line to a signal sensing device of an electric vehicle power supply device; and a microcontroller connected to the switch device; The signal sensing device includes a first resistor arranged on the signal line, and the switch device includes a first switching element with its first stage connected to the first resistor and its third stage connected to the control part; a second resistor with its first stage connected to the second stage of the first switching element and its second stage connected to a ground terminal; a third resistor with its first stage connected to the second stage of the second resistor; a fourth resistor with its first stage connected to the second stage of the third resistor and its second stage connected to the ground terminal; and a diode with its cathode terminal connected to the second stage of the fourth resistor and its anode terminal connected to the ground terminal; can be included.

[0021] The cathode terminal of the first diode and the cathode terminal of the second diode can be connected to the control part. connected to the ground terminal; can be included.

[0022] The second resistor has a resistance value larger than that of the fifth resistor, the third resistor has a resistance value larger than that of the sixth resistor, and the fourth resistor has a resistance value smaller than that of the seventh resistor; can be such that. connected to the ground terminal; can be included. The electric vehicle charging controller according to an embodiment of the present invention is a switch device connected through a signal line to a signal sensing device of an electric vehicle power supply device; and a microcontroller connected to the switch device; The signal sensing device includes a first resistor arranged on the signal line, and the switch device includes a first switching element with its first stage connected to the first resistor and its third stage connected to the control part; a second resistor with its first stage connected to the second stage of the first switching element and its second stage connected to a ground terminal; a third resistor with its first stage connected to the second stage of the second resistor; a fourth resistor with its first stage connected to the second stage of the third resistor and its second stage connected to the ground terminal; and a diode with its cathode terminal connected to the second stage of the fourth resistor and its anode terminal

[0023] The electric vehicle charging controller according to an embodiment of the present invention is a switch device connected through a signal line to a signal sensing device of an electric vehicle power supply device; and a microcontroller connected to the switch device; The signal sensing device includes a first resistor arranged on the signal line, and the switch device includes a first switching element with its first stage connected to the first resistor and its third stage connected to the control part; a second resistor with its first stage connected to the second stage of the first switching element and its second stage connected to a ground terminal; a third resistor with its first stage connected to the second stage of the second resistor; a fourth resistor with its first stage connected to the second stage of the third resistor and its second stage connected to the ground terminal; and a diode with its cathode terminal connected to the second stage of the fourth resistor and its anode terminal connected to the ground terminal; can be included. connected to the ground terminal; can be included. The second resistor has a resistance value larger than that of the fifth resistor, the third resistor has a resistance value larger than that of the sixth resistor, and the fourth resistor has a resistance value smaller than that of the seventh resistor; can be such that. connected to the control part; a second resistor with its first stage connected to the second stage of the first switching element and its second stage connected to a ground terminal; a third resistor with its first stage connected to the second stage of the second resistor; a fourth resistor with its first stage connected to the second stage of the third resistor and its second stage connected to the ground terminal; and a diode with its cathode terminal connected to the second stage of the fourth resistor and its anode terminal connected to the ground terminal; can be included. connected to the ground terminal; can be included. connected to the ground terminal; and a diode with its cathode terminal connected to the second stage of the fourth resistor and its anode terminal a first signal part including a first diode connected to a ground terminal; and a first stage being connected to the first resistor, and a third stage being connected to the control part, a second switching element; a first stage being connected to a second stage of the second switching element, and a second stage being connected to a ground terminal, a fifth resistor; a first stage being connected to a second stage of the fifth resistor, a sixth resistor; a first stage being connected to a second stage of the sixth resistor, and a second stage being connected to the ground terminal, a seventh resistor; and a cathode terminal being connected to a second stage of the seventh resistor, and an anode terminal being connected to a ground terminal, a second diode; included in a second signal part;

Advantages of the Invention

[0024] According to the embodiment, a highly compatible electric vehicle charging controller can be provided.

[0025] It is possible to detect the connection state of a signal line between an electric vehicle power supply device and an electric vehicle charging controller.

[0026] The various and beneficial advantages and effects of the present invention are not limited to the foregoing content, and will be more easily understood in the process of describing specific embodiments of the present invention.

Brief Description of the Drawings

[0027]

Figure 1

[0028]

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[0031]

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[0032]

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[0033]

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[0034]

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[0035]

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[0036]

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[0037]

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[0038]

Figure 12

Embodiments for Carrying Out the Invention

[0039] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0040] However, the technical concept of the present invention is not limited to some of the embodiments described. The present invention may be embodied in various different forms, and any variations therein may be included within the scope of the present invention. One or more of the elements may be selectively combined or substituted.

[0041] Furthermore, the terms (including technical and scientific terms) used in the embodiments of the present invention are expressly and specifically Unless otherwise defined and described, the present invention is generally understood by those skilled in the art. A term that can be interpreted in a way that is easily understood and is commonly used, such as a dictionary-defined term. may interpret its meaning taking into account the contextual meaning of the relevant art.

[0042] In addition, the terms used in the embodiments of the present invention are intended to describe the embodiments and are not to be construed as limiting the present invention. It's not an attempt to be restrictive.

[0043] As used herein, the singular can include the plural unless the context clearly dictates otherwise, and examples include "A and If "(and) at least one of B and C" is stated, then A, B, and C It may include one or more of all possible combinations.

[0044] In addition, in describing the components of the embodiment of the present invention, first, second, A, B, (a) , (b) etc. can be used.

[0045] Such terms are merely used to distinguish one component from another and are not used in any way to distinguish one component from another. The terms are not intended to limit the nature, order, or sequence of the components.

[0046] When it is described that a certain component is "connected", "coupled", or "attached" to another component, that component can be directly connected, coupled, or attached to the other component, but can also include the case where it is "connected", "coupled", or "attached" by yet another component between that component and the other component.

[0047] Also, when it is described that something is formed or arranged "above or below" each component, above or below includes not only the case where two components are in direct contact with each other, but also the case where one or more additional components are formed or arranged between the two components. Also, when expressed as "above or below", it can include the meaning not only in the upward direction but also in the downward direction with respect to one component.

[0048] FIG. 1 is a drawing for explaining an electric vehicle charging system according to an embodiment of the present invention.

[0049] The electric vehicle charging system according to an embodiment of the present invention can mean a system for charging the battery of an electric vehicle that operates using electric energy as power.

[0050] Referring to FIG. 1, the electric vehicle charging system according to an embodiment of the present invention can include an electric vehicle supply equipment (EVS, 10) and an electric vehicle (EV, 20).

[0051] The electric vehicle supply equipment 10 is a facility that supplies AC or DC power and is installed at a charging station. ​​​​​​​It may be placed or arranged within a home and may be embodied in a portable form. The electric vehicle power supply device 10 can be used in combination with a charging station (supply), an AC charging station (AC supply), a DC charging station (DC supply), etc. The electric vehicle power supply device 10 can receive supply of AC or DC power from the main power supply side . The main power supply can include a power grid, etc. The electric vehicle power supply device 10 can step-down or convert the AC or DC power supplied from the main power supply and supply it to the electric vehicle 20.

[0052] The electric vehicle 20 means a vehicle that operates with all or part of the energy supplied from the mounted battery. The electric vehicle 20 includes not only an electric vehicle that runs only on the electrical energy charged in the battery, but also a plug-in hybrid electric vehicle (Plug-in Hybrid Electric Vehicle, PHEV) that runs in parallel with an engine using fossil fuel. The battery provided in the electric vehicle 20 can be charged by receiving power from the electric vehicle power supply device 10.

[0053] FIG. 2 is a drawing showing the configuration of an electric vehicle charging system according to an embodiment of the present invention.

[0054] The electric vehicle charging system according to an embodiment of the present invention includes an electric vehicle power supply device (10, Electric Vehicle Supply Equipment, EVSE), a cable (50, cable), a connector (51, connector), an inlet (52 , inlet), a junction box (100, junction box), and an electric vehicle charging controller (200, Electric Vehicle Charging ​ Controller, EVCC), battery 300, battery management system (4 00, Battery Management System, BMS) and integrated power control device (500, Electric Power Control Unit, EPCU) can be included. The components included in the electric vehicle charging system are the electric vehicle power supply device 10 side (EVSE side) components and the electric vehicle 20 side (EV side) components can be divided. The components on the electric vehicle power supply device 10 side can include the electric vehicle power supply device 10, cable 50 and connector 51. The components on the electric vehicle side can include inlet 52, junction box 100, electric vehicle charging controller 200, battery 300 , battery management system 400 and integrated power control device 500. Such a division is for convenience of explanation and is not limiting.

[0055] First, the electric vehicle power supply device 10 supplies power for charging the battery 300 of the electric vehicle . The electric vehicle power supply device 10 can transmit the power supplied from the main power supply (for example, the power grid) to the electric vehicle 20. At this time, the electric vehicle power supply device 1 0 can step down or convert the power supplied from the main power supply and supply it to the electric vehicle 20 . According to one embodiment, when the electric vehicle power supply device 10 supplies AC power to the electric vehicle 20 , the electric vehicle power supply device 10 can transform the AC power supplied from the main power supply and supply it to the electric vehicle 20 . In another embodiment, when the electric vehicle power supply device 10 supplies DC power to the electric vehicle 20 , the electric vehicle power supply device 10 supplies the power supplied from the main power supply to the electric vehicle 20 The converted AC power can be converted into DC power and supplied to the electric vehicle 20. For voltage conversion and transformation, the electric vehicle power supply device 10 can include a power conversion device. According to an embodiment, the electric vehicle power supply device 10 can include a rectifier, an isolation transformer, an inverter, a converter, etc. The electric vehicle power supply device 10 can include a charging control device for transmitting and receiving various control signals necessary for charging the battery 300 of the electric vehicle 20 and controlling the battery charging process. The charging control device can transmit and receive control signals with the electric vehicle 20 and perform the battery charging process. The control signals can include information such as charging preparation, charging end, proximity detection, etc.

[0056] The charging control device can include a communication device for communicating with the electric vehicle 20. The communication device can communicate with the electric vehicle 20 using power line communication (PLC), controller area network (CAN), etc. The communication device can be included in the charging control device or separately configured. Next, the cable 50, the connector 51, and the inlet 52 electrically connect the electric vehicle power supply device 10 and the electric vehicle. The cable 50 transmits power and signals between the electric vehicle power supply device 10 and the electric vehicle 20. The cable 50 includes a power line for transmitting power and a signal line for transmitting control signals related to charging. The connector 51 is connected to the cable 50 and is configured to be detachably connected to the inlet 52 of the electric vehicle 20. The inlet 52 is provided on the electric vehicle 20 and is configured to be detachably connected to the connector 51. The connector 51 and the inlet 52 are designed to ensure reliable electrical connection and easy disconnection for maintenance and replacement.

[0057]

[0058] ​​​​It can include a signal line, a ground wire for connecting to the ground, etc.

[0059] The cable 50 is connected to the electric vehicle power supply device 10. According to one embodiment, the electric vehicle power supply device 10 and the cable 50 can be directly connected without a separate connection structure. Further according to other embodiments, the electric vehicle power supply device 10 and the cable 50 can be connected through the coupling of a socket-outlet provided in the electric vehicle power supply device 10 and a plug provided in the cable 50.

[0060] The connector 51 can be connected to the cable 50, and the inlet 52 can be provided in the electric vehicle 20. The connector 51 and the inlet 52 can be bundled together and named a coupler. The connector 51 and the inlet 52 have a structure that can be coupled to each other, and the electric vehicle 20 and the electric vehicle power supply device 10 can be electrically connected through the coupling of the connector 51 and the inlet 52. The inlet 52 and the connector 51 can be directly connected, and can also be connected through an adaptor.

[0061] The connector 51 and the inlet 52 can be provided with a plurality of pins that can be coupled to each other. For example, one of the plurality of pins can be a pin for the CP (Control Pilot) port through which a CP (Control Pilot) signal is transmitted between the electric vehicle power supply device 10 and the electric vehicle charging controller 200, another one can be a pin for the PD (Proximity Detection) port for sensing the presence or absence of proximity between the connector 51 and the inlet 52, and still another one can be a protective ground (Prot ected Ground) that is connected to the protective ground of the electric vehicle power supply device 1010. ​​​​​​​​​​​It can be a pin for the Objective Earth, PE) port. Among the plurality of pins, yet another can be a pin for driving a motor for opening a fuel filler flap, yet another can be a pin for sensing a motor, yet another can be a pin for temperature sensing, yet another can be a pin for LID sensing, and yet another can be a pin for CAN communication. One of the plurality of pins can be a pin for a voltage line applied from a collision sensing sensor within the electric vehicle 20, another can be a battery pin for supplying charging power to the electric vehicle 20, and yet another can be a pin for high voltage protection. However, the number and functions of the pins are not limited to this and can be variously deformed.

[0062] The junction box 100 transmits the power supplied from the electric vehicle power supply device 10 to the battery 300. The power supplied from the electric vehicle power supply device 10 is at a high voltage, and if this were to be directly supplied to the battery 300, the battery 300 could be damaged by the inrush current. The junction box 100 can include at least one relay to prevent damage to the battery

[0063] from the inrush current. The electric vehicle charging controller 200 can control some or all of the process related to charging the battery of the electric vehicle 20. The electric vehicle charging controller 200 may be named the Electric Vehicle Communication

[0064] The electric vehicle charging controller 200 can communicate with the electric vehicle power supply device 10. The electric vehicle charging controller 200 can send and receive control commands regarding the battery charging process from the electric vehicle power supply device 10. According to one embodiment, the electric vehicle charging controller 200 can communicate with the charging control device provided in the electric vehicle power supply device 10, and can send and receive control commands regarding the battery charging process from the charging control device.

[0065] The electric vehicle charging controller 200 can communicate with the electric vehicle 20. The electric vehicle charging controller 200 can receive control commands regarding the battery charging process from the electric vehicle 20. According to one embodiment, the electric vehicle charging controller 200 can communicate with the battery management system 400 of the electric vehicle 20, and can also receive control commands regarding the battery charging process from the battery management system 400. According to still other embodiments, the electric vehicle charging controller 200 can communicate with the integrated power control device 500 of the electric vehicle 20, and can receive control commands regarding the battery charging process from the integrated power control device 500.

[0066] The electric vehicle charging controller 200 can include a micro controller unit (MCU), a communication device, a relay device, etc. to perform the above functions.

[0067] The battery management system 400 manages the energy state of the battery 300 in the electric vehicle 20. The battery management system 400 monitors the current usage status of the battery 300. ​​​​​​​​​​​​​ and perform control for efficient energy distribution. For example, the battery management system 400 can transmit the available power situation of the electric vehicle 20 for efficient use of energy to the vehicle integrated controller, the inverter, and the like. As another example, the battery management system 400 can correct the voltage deviation per cell of the battery 300 and drive a cooling fan to maintain the battery 300 at an appropriate temperature.

[0068] The integrated power control device 500 is a device that controls the overall movement of an electric vehicle including motor control. The integrated power control device 500 can include a motor control unit (MCU), a low voltage DC-DC converter (LDC), and a vehicle integrated controller (VCU). The motor control device may be named an inverter. The motor control device can receive a DC power supply from the battery and convert it into a three-phase AC power supply, and can control the motor according to the commands of the vehicle integrated controller. The low voltage DC-DC converter can convert a high voltage power supply into a low voltage (e.g., 12 [V]) power supply and supply it to each component of the electric vehicle 20. The vehicle integrated controller plays a role in maintaining the performance of the system related to the entire electric vehicle 20. The vehicle integrated controller can perform various functions such as charging and driving together with various

[0069] FIG. 3 is a drawing showing the circuit configuration of an electric vehicle charging system according to an embodiment of the present invention.

[0070] Referring to FIG. 3, an electric vehicle charging system according to an embodiment of the present invention includes an electric vehicle power supply device 10, a connector 51, an inlet 52, and an electric vehicle 20.

[0071] First, the electric vehicle power supply device 10 may include overload circuit breakers RCBO1 and RCBO2, a power conversion device PCS, an insulation monitoring device CT, a communication device COM1, a plurality of power lines DC+ and DC-, a plurality of signal lines C1 to C6, and a ground wire FE. The plurality of power lines DC+ and DC-, the plurality of signal lines C1 to C6, and the ground wire FE can be extended to the electric vehicle 20 through the connection between the connector 51 and the inlet 52.

[0072] The electric vehicle power supply device 10 can receive AC power from the power grid. The received AC power can pass through the overload circuit breakers RCBO1 and RCBO2. The overload circuit breakers RCBO1 and RCBO2 can perform the role of cutting off the reception of AC power when an overload occurs in the electric vehicle power supply device 10.

[0073] The AC power passing through the overload circuit breaker RCBO1 is input to the power conversion device PCS and converted into DC power. The power conversion device PCS supplies DC power to the electric vehicle 20 through two power lines DC+ and DC-. A diode (a) for blocking the reverse voltage from the electric vehicle 20 can be arranged on the first power line DC+ of the two power lines DC+ and DC-, and a fuse ( u) for preventing damage caused by the overvoltage applied from the electric vehicle 20 can be arranged on the second power line DC-.

[0074] The insulation monitoring device CT can be arranged between the two power lines DC+ and DC- and the ground. The insulation monitoring The device CT can monitor the insulation state of two power lines DC+ and DC-.

[0075] The first signal line C1 and the second signal line C2 can represent signal lines indicating the start / stop state of the electric vehicle power supply device 10. The first signal line C1 and the second signal line C2 are for the electric vehicle power supply device 10 to transmit charging sequence signals such as ready to charge and end of charge to the electric vehicle 20. For this purpose, a 12[V] power supply is connected to one end of the first signal line C1, and ground is connected to one end of the second signal line C2 obtainable. And two switch devices d1 and d2 can be respectively arranged on the first signal line C1 and the second signal line C2. The electric vehicle power supply device 10 can transmit the charging sequence signal to the electric vehicle through the on / off operation of the two switch devices d1 and d2.

[0076] The third signal line C3 can represent a signal line indicating the connection state between the connector 51 and the inlet 52. The third signal line C3 can transmit a proximity signal according to the connection state between the connector 51 and the inlet 52. One end of the third signal line C3 can be connected to the second signal line C2.

[0077] The fourth signal line C4 can represent a signal line for approving charging permission for the electric vehicle 20. The fourth signal line C4 can transmit control signals such as start of charging or stop of charging from the electric vehicle 20 to the electric vehicle power supply device 10. The fourth signal line C4 is connected to the signal sensing device j, and the signal sensing device j can sense the control signal transmitted through the fourth signal line C4.

[0078] ​​​​​​​​ The fifth signal line C5 and the sixth signal line C6 may mean signal lines for data communication. The fifth signal line C5 and the sixth signal line C6 may be connected to the communication device COM1.

[0079] Next, the electric vehicle may include a junction box 100, an electric vehicle charging controller 20 0 and a battery 300. The electric vehicle 20 may include a plurality of power lines DC+, DC−, a plurality of signal lines C1 to C6, and a ground line FE.

[0080] The junction box 100 may be connected to two power lines DC+, DC−. The jun ction box 100 may include two contactors (contactor, c) arranged on each of the two power lines DC+, DC−. The two contactors may be turned on and off by the electric vehicle charging controller 200. The junction box 100 may be connected to the battery 300 through the two power lines DC+, DC−, and can transmit the DC power received from the electric vehicle power supply device 10 to the battery 300 to perform charging.

[0081] The electric vehicle charging controller 200 may include a relay device e, a plurality of signal sensing devices f, g, h, a switch k, and a communication device COM2. The electric vehicle charging controller 2

[0082] 00 may be connected to a plurality of signal lines C1 to C6 and a ground line FE. The relay device e may be arranged between the first signal line C1 and the second signal line C2. Specifically, one end of the relay device e may be connected to the second signal line C2, and the other end may be connected to the first signal line C1. At this time, two contactors c may be connected between the other end of the relay device e and the first signal line C1. The relay device e can control the opening and closing of two contactors c through its opening and closing operation.

[0083] The first signal sensing device f and the second signal sensing device g are connected to the first signal line C1 and the second signal line C2. The two signal sensing devices f and g are provided in the electric vehicle power supply device 10. The signal generated when the two switch devices d1 and d2 are turned on can be detected. The two signal sensing devices f and g transmit the sensed signals to the electric vehicle charging controller 200. The information can be transmitted to a microcontroller included in the vehicle or a vehicle integrated controller.

[0084] The third signal sensing device h is connected to the third signal line C3. The third signal sensing device h is connected to the connector 5. 1 and the inlet 52.

[0085] The switch k is connected to the fourth signal line C4. When the switch k is turned on, A signal to inform the electric vehicle power supply device 10 of the start of charging can be transmitted.

[0086] The communication device COM2 is connected to the fifth signal line C5 and the sixth signal line C6. M2 can communicate with the communication device COM1 through a fifth signal line C5 and a sixth signal line C6. can.

[0087] FIG. 4 is a diagram showing an embodiment of a circuit configuration between the fourth signal line and the signal sensing device of FIG. FIG. 5 shows another embodiment of the circuit configuration between the fourth signal line and the signal sensing device of FIG. This is a drawing.

[0088] FIG. 4 shows a circuit configuration for CHAdeMO 0.9, which is the standard charging specification for electric vehicles. Referring to FIG. 4, the signal connected to the fourth signal line C4 in the electric vehicle power supply device 10 The sensing device j can include an optocoupler and a first resistor RA A voltage of 12 [V] can be connected to the first stage of the optocoupler, and the first resistor can be connected to the second stage The fourth signal line C4 can be connected to the switch device k of the electric vehicle charging controller 200 through pin 6 of the coupler At this time, the magnitude of the first resistor RA must be 264 [Ω] or less, and the current flowing through the fourth signal line C4 must be 50 [mA] or less

[0089] FIG. 5 can be the circuit configuration in CHAdeMO 1.0, which is the standard charging specification for electric vehicles Referring to FIG. 5, the signal connected to the fourth signal line C4 in the electric vehicle power supply device 10 The sensing device j can include an optocoupler and a first resistor. A voltage of 12 [V] can be connected to the first stage of the optocoupler, and the first resistor can be connected to the second stage The fourth signal line C4 can be connected to the electric vehicle charging controller 200 through pin 6 of the coupler. The electric vehicle charging controller 200 can arrange a resistor RB and a switch device k on the fourth signal line C4 At this time, the first resistor RA must be 1 k[Ω], the resistor RB must be 200 [Ω], and the current flowing through the fourth signal line C4 must be 11 [mA] or less

[0090] Thus, in the case of the circuit configurations described in FIGS. 4 and 5, the maximum current values allowed on the fourth signal line C4 are different from each other. Therefore, the electric vehicle charging controllers 200 in CHAdeMO 0.9 and CHAdeMO 1.0, which are the standard specifications for electric vehicles, are not compatible with each other ​​​​​​​In the case of electric vehicles with CHAdeMO 0.9 and CHAdeMO 1.0, which are Japanese electric vehicle standards, the battery cannot be charged unless they are equipped with different electric vehicle charging controllers 200.

[0091] FIG. 6 is a configuration diagram showing an electric vehicle charging controller according to an embodiment of the present invention.

[0092] Referring to FIG. 6, an electric vehicle charging controller 200 according to an embodiment of the present invention includes a switch device 210 and a control unit 220. The switch device 210 includes a first signal unit 211 and a second signal unit 212.

[0093] The switch device 210 is connected to a signal sensing device of an electric vehicle power supply device through a signal line. The switch device 210 generates a charging permission signal and transmits it to the signal sensing device.

[0094] The switch device 210 includes a first signal unit 211 and a second signal unit 212.

[0095] The first signal unit 211 includes a first switching element. The first signal unit 211 generates a charging permission signal by turning on the first switching element based on the first switching signal among the plurality of switching signals output by the control unit 220.

[0096] The second signal unit 212 includes a second switching element. The second signal unit 212 generates a charging permission signal by turning on the second switching element based on the second switching signal among the plurality of switching signals output by the control unit 220.

[0097] The first signal unit 211 and the second signal unit 212 operate selectively. That is, the first signal unit 21 ​​​​​When 1 generates a charging permission signal, the second signal unit 212 does not generate a charging permission signal. Conversely, when the first signal unit 211 does not generate a charging permission signal, the second signal unit 212 generates a charging permission signal. In other words, when the first switching element is turned on by the first switching signal, the second switching element is turned off by the second switching signal . And when the first switching element is turned off by the first switching signal, the second switching element is turned on by the second switching signal.

[0098] The control unit 220 controls the switch device 210 through a plurality of switching signals. The control unit 220 controls the switching element of the switch device 210 according to the resistance value of the first resistor included in the electric vehicle power supply device.

[0099] When the resistance value of the first resistor is greater than the first reference value and less than the second reference value, the control unit 220 can turn on the first switching element through the first switching signal and turn off the second switching element through the second switching signal to control the first signal unit 211 to generate a charging permission signal.

[0100] When the resistance value of the first resistor is greater than the second reference value and less than the third reference value, the control unit 220 can turn off the first switching element through the first switching signal and turn on the second switching element through the second switching signal to control the second signal unit 212 to generate a charging permission signal.

[0101] The control unit 220 receives the node voltage of the first signal unit 211 or the second signal unit 212, and the node It is possible to detect the electrical connection state between the electric vehicle power supply device and the electric vehicle according to the magnitude of the node voltage. It can be done.

[0102] In one embodiment, when the magnitude of the node voltage is included in the first voltage range, the control unit 220 can determine that the electrical connection state is in an open state. In one embodiment, when the magnitude of the node voltage of the control unit 220 is included in the second voltage range or the fourth voltage range that is larger than the first voltage range, the electrical connection state can be determined to be a poor contact. In one embodiment, when the magnitude of the node voltage of the control unit 220 is included in the third voltage range between the second voltage range and the fourth voltage range, the electrical connection state can be determined to be in a normal state. In one embodiment, when the magnitude of the node voltage of the control unit 220 is included in the fifth voltage range that is larger than the fourth voltage range, the electrical connection state can be determined to be in an overvoltage state. In one embodiment, when the magnitude of the node voltage of the control unit 220 is included in the second voltage range or the fourth voltage range that is larger than the first voltage range, the electrical connection state can be determined to be a poor contact. In one embodiment, when the magnitude of the node voltage of the control unit 220 is included in the third voltage range between the second voltage range and the fourth voltage range, the electrical connection state can be determined to be in a normal state. In one embodiment, when the magnitude of the node voltage of the control unit 220 is included in the third voltage range between the second voltage range and the fourth voltage range, the electrical connection state can be determined to be in a normal state. In one embodiment, when the magnitude of the node voltage of the control unit 220 is included in the third voltage range between the second voltage range and the fourth voltage range, the electrical connection state can be determined to be in a normal state. In one embodiment, when the magnitude of the node voltage of the control unit 220 is included in the fifth voltage range that is larger than the fourth voltage range, the electrical connection state can be determined to be in an overvoltage state. It can be done.

[0103] The control unit 220 can transmit the detection result of the electrical connection state to the electric vehicle power supply device. The control unit 220 can transmit the detection result of the electrical connection state to the battery management system, the integrated power management device, etc. in the electric vehicle. In another example, the control unit 220 can also transmit the detection result of the electrical connection state to the user terminal. The control unit 220 can transmit the detection result of the electrical connection state to the battery management system, the integrated power management device, etc. in the electric vehicle. In another example, the control unit 220 can also transmit the detection result of the electrical connection state to the user terminal. In another example, the control unit 220 can also transmit the detection result of the electrical connection state to the user terminal.

[0104] The control unit 220 can be implemented by a microcontroller (MCU).

[0105] FIG. 7 is a drawing showing a circuit diagram of an electric vehicle charger according to an embodiment of the present invention. It is.

[0106] The electric vehicle charger 200 according to an embodiment of the present invention includes a switch device 210 and a control unit 220. The switch device 210 includes a first signal unit 211 and a second signal unit 212. The switch device 210 includes a first signal unit 211 and a second signal unit 212. includes.

[0107] The first signal section 211 includes a first switching element Q1, a second resistor RB, a third resistor RC, a fourth resistor RD and a first diode D1.

[0108] The first stage of the first switching element Q1 is connected to the first resistor RA of the electric vehicle power supply device 10. The second stage of the first switching element Q1 is connected to the first stage of the second resistor RB. The third stage of the first switching element Q1 is connected to the control section 220. The first switching element Q 1 can be a bipolar junction transistor (BJT). The first switching element Q1 can include a collector terminal, an emitter terminal, and a base terminal. The collector terminal of the first switching element Q1 can be connected to the first resistor RA. The emitter terminal of the first switching element Q1 can be connected to the first stage of the second resistor RB. The base terminal of the second switching element Q2 can be connected to the control section 220. The second resistor RB has its first stage connected to the second stage of the first switching element Q1. The second resistor R B has its second stage connected to the ground terminal. The second stage of the second resistor RB can be connected to the first stage of the third resistor RC.

[0109] The first stage of the third resistor RC is connected to the second stage of the second resistor RB. The first stage of the third resistor RC can be connected to the ground terminal. The second stage of the third resistor RC can be connected to the first stage of the fourth resistor RD and can be connected to the cathode terminal of the first diode D1. The second stage of the third resistor RC can be connected to the control section 220.

[0110] The first stage of the third resistor RC is connected to the second stage of the second resistor RB. The first stage of the third resistor RC can be connected to the ground terminal. The second stage of the third resistor RC can be connected to the first stage of the fourth resistor RD and can be connected to the cathode terminal of the first diode D1. The second stage of the third resistor RC can be connected to the control section 220. The second stage of the third resistor RC can be connected to the control section 220.

[0111] The fourth resistor RD has its first stage connected to the second stage of the third resistor RC. The first stage of the fourth resistor RD can be connected to the cathode terminal of the first diode D1. The first stage of the fourth resistor RD can be connected to the control unit 22 at 0. The second stage of the fourth resistor RD is connected to the ground terminal.

[0112] The cathode terminal of the first diode D1 is connected to the second stage of the fourth resistor RD. The cathode terminal of the first diode D1 is connected to the control unit 220. The anode terminal of the first diode D1 is connected to the ground terminal.

[0113] As detailed above, the second stage of the third resistor RC, the first stage of the fourth resistor RD, and the cathode terminal of the first diode D1 are connected through the first node. The first node is connected to the control unit 220, and the control unit 220 can receive the input of the node voltage of the first node.

[0114] The second signal unit 212 includes a second switching element Q2, a fifth resistor RE, a sixth resistor RF, a seventh resistor RG, and a second diode D2.

[0115] The first stage of the second switching element Q2 is connected to the first resistor RA of the electric vehicle power supply device 10. The second stage of the second switching element Q2 is connected to the first stage of the fifth resistor RE. The third stage of the second switching element Q2 is connected to the control unit 220. The second switching element Q2 can be a bipolar junction transistor. The second switching element Q2 can include a collector terminal, an emitter terminal, and a base terminal. The collector terminal of the second switching element Q2 is the first resistor ​​​​​​It can be connected to RA. The emitter terminal of the second switching element Q2 can be connected to the first stage of the fifth resistor RE . The base terminal of the second switching element Q2 can be connected to the control unit 220 .

[0116] The first stage of the fifth resistor RE is connected to the second stage of the second switching element Q2. The fifth resistor R E has its second stage connected to the ground terminal. The second stage of the fifth resistor RE can be connected to the first stage of the sixth resistor RF .

[0117] The first stage of the sixth resistor RF is connected to the second stage of the fifth resistor RE. The first stage of the sixth resistor RF can be connected to the ground terminal. The second stage of the sixth resistor RF can be connected to the first stage of the seventh resistor RG . The second stage of the sixth resistor RF can be connected to the cathode terminal of the second diode D2. The sixth resistor RF can have its second stage connected to the control unit 220

[0118] The first stage of the seventh resistor RG is connected to the second stage of the sixth resistor RF. The first stage of the seventh resistor RG can be connected to the cathode terminal of the second diode D2. The first stage of the seventh resistor RG can be connected to the control unit 22 0. The second stage of the seventh resistor RG is connected to the ground terminal

[0119] The cathode terminal of the second diode D2 is connected to the second stage of the seventh resistor RG. The second diode D2 has its cathode terminal connected to the control unit 220. The anode terminal of the second diode D2 is connected to the ground terminal

[0120] As detailed above, the second stage of the sixth resistor RF, the first stage of the seventh resistor RG, and the cathode terminal of the second diode D2 are connected through the second node. The second node is connected to the control unit 220, and the control unit 220 can receive the input of the node voltage of the second node .

[0121] The following Table 1 shows the resistance values of the first to seventh resistors RA to RG according to the embodiments of the present invention.

[0122]

Table 1

[0123] Referring to Table 1, the first resistor RA of the electric vehicle power supply device 10 can have a resistance value of 1 kΩ or 2 64 Ω. The first signal unit 211 and the second signal unit 212 can have corresponding circuit structures. The second resistor RB corresponds to the fifth resistor RE, the third resistor RC corresponds to the sixth resistor RF, and the fourth resistor RD corresponds to the seventh resistor RG, which can be achieved. However, the resistance values of the corresponding resistors can be different. This is because even if the first signal unit 211 and the second signal unit 212 operate selectively depending on the resistance value of the first resistor RA, the same node voltage is input to the control unit 220 at the first node or the second node due to the connection state. This is for the purpose of making the same node voltage input to the control unit 220 at the first node or the second node. That's why.

[0124] The second resistor RB can have a resistance value greater than that of the fifth resistor RE. The second resistor RB of the first signal unit 21 1 can have a resistance value of 200 Ω, and the fifth resistor RE of the second signal unit 212 can have a resistance value of 1 kΩ, which is greater than 200 Ω.

[0125] The third resistor RC can have a resistance value greater than that of the sixth resistor RF. The third resistor RC of the first signal unit 21 1 can have a resistance value of 1 kΩ, and the sixth resistor RF of the second signal unit 212 can have a resistance value of 10 kΩ, which is greater than 1000 Ω.

[0126] The fourth resistor RD can have a value smaller than that of the seventh resistor RG. The The fourth resistor RD can have a resistance value of 10 kΩ, and the seventh resistor RG of the second signal portion 212 can have a resistance value of 2.4 kΩ, which is smaller than 10 kΩ.

[0127] FIG. 8 is a first driving example of the switch device according to an embodiment of the present invention.

[0128] In the first driving example illustrated in FIG. 8, when a charge permission signal is generated through the first signal portion 211 , it represents the flow of current.

[0129] The electric vehicle power supply device 10 can include a signal sensing device composed of a first resistor RA and a predetermined circuit for sensing a charge permission signal. The predetermined circuit is connected to the first stage of the first resistor RA , and a voltage is applied to the first resistor RA through a voltage source connected to the predetermined circuit. Since the voltage source applies a voltage to the first resistor RA through the predetermined circuit, there may be a voltage drop due to the predetermined circuit . The voltage of the voltage source causes a voltage drop in the predetermined circuit when applying a voltage to the first resistor RA, so there may be a voltage drop due to the predetermined circuit.

[0130] In the first driving example, the first switching element Q1 is turned on and the second switching element Q2 is turned off. Therefore, the current I1 from the voltage source of the signal sensing device of the electric vehicle power supply device 10 flows through the second to fourth resistors RD and does not flow through the fifth to seventh resistors RG. Accordingly, the signal sensing device of the electric vehicle power supply device 10 senses the charge permission signal generated by the second to fourth resistors RD.

[0131] In the case of the first diode D1, since the cathode terminal is connected to the second stage of the second resistor RB, the current I1 does not flow. However, the voltage applied to the first diode D1 is the first diode D When the breakdown voltage of 1 is exceeded, the electrical resistance is destroyed and current I1 will flow. According to one embodiment, when an excessive current such as an inrush current is applied to the first signal section 211 and the breakdown voltage is applied to the first diode D1, the first diode D1 will have its electrical resistance destroyed and current I1 will flow to the ground terminal. This is to prevent the control section 22 connected to the cathode terminal of the first diode D1 from being damaged by an excessive current such as an inrush current.

[0132] FIG. 9 shows a second driving example of the switch device according to an embodiment of the present invention.

[0133] The electric vehicle power supply device 10 can include a signal sensing device composed of a first resistor RA and a predetermined circuit for sensing a charge permission signal. The predetermined circuit is connected to the first stage of the first resistor RA, and a voltage is applied to the first resistor RA through a voltage source connected to the predetermined circuit. Since the voltage source applies a voltage to the first resistor RA through the predetermined circuit, there may be a voltage drop due to the predetermined circuit.

[0134] In the second driving example, the first switching element Q1 is turned off and the second switching element Q2 is turned on. Therefore, the current I2 from the voltage source of the signal sensing device of the electric vehicle power supply device 10 does not flow through the second to fourth resistors RD, but flows through the fifth to seventh resistors RG. Therefore, the signal sensing device of the electric vehicle power supply device 10 senses the charge permission signal generated by the fifth to seventh resistors RG.

[0135] In the case of the second diode D2, since the cathode terminal is connected to the second stage of the second resistor RB, ​​​​​​​​Current I2 does not flow. However, when the voltage applied to the second diode D2 exceeds the breakdown voltage of the second diode D 2, the electrical resistance is destroyed and current I2 flows. According to one embodiment, when an excessive current such as an inrush current is applied to the second signal section 212 and the breakdown voltage is applied to the second diode D2, the second diode D2 has its electrical resistance destroyed and current flows to the ground terminal. This is to prevent the control section 220 connected to the cathode terminal of the second diode D2 from being damaged by an excessive current such as an inrush current.

[0136] FIG. 10 is a diagram for explaining the voltage detected at the first node of the first signal section according to an embodiment of the present invention.

[0137] FIG. 10 illustrates a circuit configuration when the first switching signal of the first signal section is turned on and the second s witching signal of the second signal section is turned off.

[0138] The control section can receive an input of the node voltage Va from the first node a to which the third resistor RC, the fourth resistor RD, and the first diode D1 are connected.

[0139] The following mathematical formula 1 represents the node voltage Va detected at the first node a. Formula 1

[0140] TIFF2025098183000003.tif20131

[0141] The following Table 2 shows the resistance values and voltage values according to one embodiment.

[0142]

Table 2

[0143] ​​​ As shown in Table 2, when the voltage (Vs) is 12 [V], the first resistor RA is 1 kΩ, the second resistor RB is 200 Ω, the third resistor RC is 1 kΩ, and the fourth resistor RD is 10 kΩ According to Mathematical Formula 1, when this is the case, the node voltage Va of the first node a becomes approximately 1.8 [V]. That is, when the first receiving unit is normally driven to generate a charge permission signal, the control unit can receive an input of the node voltage Va of approximately 1. 8 [V]. FIG. 11 is a drawing for explaining the voltage detected at the second node of the second signal unit according to an embodiment of the present invention. FIG. 11 illustrates a circuit configuration when the first switching signal of the first signal unit is turned off and the second switching signal of the second signal unit is turned on.

[0144] FIG. 11 illustrates a circuit configuration when the first switching signal of the first signal unit is turned off and the second switching signal of the second signal unit is turned on.

[0145] The control unit can receive an input of the node voltage Vb from the second node b to which the sixth resistor RF, the seventh resistor RG, and the second diode D2 are connected.

[0146] The following Mathematical Formula 1 represents the node voltage Vb detected at the second node b. Formula 2

[0147] TIFF2025098183000005.tif21152

[0148] The following Table 3 shows resistance values and voltage values according to an embodiment.

[0149]

Table 3

[0150] As shown in Table 2, when the voltage (Vs) is 12 [V], the first resistor RA is 264 Ω , the fifth resistor RE is 1 kΩ, the sixth resistor RF is 1 kΩ, and the seventh resistor RG is 2.4 kΩ ​When it is the case, according to Mathematical Formula 1, the node voltage Vb of the first node becomes approximately 1.8 [V]. . That is, when the second receiving unit is normally driven to generate a charge permission signal, the control unit is approximately 1. 8 [V] of the node voltage Vb can be received. FIG. 12 is a diagram for explaining the electrical connection state detection process between the electric vehicle power supply device according to an embodiment of the present invention and the electric vehicle charging controller. It is a drawing.

[0151] The control unit detects the electrical connection state between the electric vehicle power supply device and the electric vehicle charging controller through the magnitude of the node voltage input from the first receiving unit or the second receiving unit. It can be done.

[0152] When the magnitude of the node voltage is included in the first voltage range, the control unit can determine that the electrical connection state is an open state (open case). According to one embodiment, the first voltage range may mean a range greater than the first voltage V0 and less than the first voltage V1. The first voltage V0 may be 0 [V .

[0153] When the magnitude of the node voltage is included in the second voltage range greater than the first voltage range, the control unit can determine that the electrical connection state is out of case. According to one embodiment, the first voltage range means a range greater than 0 [V] and less than the first voltage V1, and the second voltage range may mean a range greater than the first voltage V1 and less than the second voltage V2.

[0154] When the magnitude of the node voltage is included in the third voltage range greater than the second voltage range, the control unit can determine that the electrical connection state is in a normal status. According to one embodiment, the second voltage range means a range greater than the first voltage V1 and less than the second voltage V2. The second voltage range means a range greater than the second voltage V2 and less than the third voltage V3, and the third voltage range may mean a range greater than the second voltage V2 and less than the third voltage V3. The third voltage range may be a range including a value of 1.8 [V] that can be detected when the first receiving unit or the second receiving unit operates normally. It may be a range including the value.

[0155] When the magnitude of the node voltage is included in a fourth voltage range greater than the third voltage range, the control unit can determine that the electrical connection state is out of case. According to one embodiment, the third voltage range means a range greater than the second voltage V2 and less than the third voltage V3, and the fourth voltage range may mean a range greater than the third voltage V3 and less than the fourth voltage V4. According to one embodiment, the third voltage range means a range greater than the second voltage V2 and less than the third voltage V3, and the fourth voltage range may mean a range greater than the third voltage V3 and less than the fourth voltage V4.

[0156] When the magnitude of the node voltage is included in a fifth voltage range greater than the fourth voltage range, the control unit can determine that the electrical connection state is an overvoltage case. According to one embodiment, the fourth voltage range means a range greater than the third voltage V3 and less than the fourth voltage V4, and the fifth voltage range may mean a range greater than the fourth voltage V4 and less than the fifth voltage V5. According to one embodiment, the fourth voltage range means a range greater than the third voltage V3 and less than the fourth voltage V4, and the fifth voltage range may mean a range greater than the fourth voltage V4 and less than the fifth voltage V5. The fifth voltage V5 may be 5 [V]. The fifth voltage V5 may be 5 [V].

[0157] Although the above has been described mainly with reference to the embodiments, this is merely an example and does not limit the present invention. It will be understood by those of ordinary skill in the art to which the present invention pertains that various modifications and applications not exemplified above are possible without departing from the essential characteristics of the embodiments. For example, each component specifically shown in the embodiments can be implemented with modifications. And differences related to such modifications and applications should be construed as being included in the scope of the present invention defined by the appended claims. And differences related to such modifications and applications should be construed as being included in the scope of the present invention defined by the appended claims. It should be construed that the scope of the present invention includes the scope defined by the appended claims.

Claims

1. It is connected to the signal detector of the electric vehicle power supply device through a signal line and generates a charging permission signal. a switch device for generating a signal and transmitting the signal to the signal sensing device; and A control unit controls the switch device through a plurality of switching signals; The signal sensing device of the electric vehicle power supply device includes: A first resistor is disposed on the signal line; The switch device comprises: a first switching element, a first switching element that turns on based on the charging permission signal to generate the charging permission signal; Signal section; and a second switching element, the second switching signal being one of the plurality of switching signals; a second switching element that turns on based on the charging permission signal to generate the charging permission signal; A signal section; The first signal unit or the second signal unit outputs the charging permission signal according to the resistance value of the first resistor. The electric vehicle charging controller generates the signal.

2. The control unit is When the resistance value of the first resistor is greater than a first reference value and less than a second reference value, the first switch The first switching element is turned on by the second switching signal. The first signal unit turns off the second switching element through the charging permission signal. The electric vehicle charging controller of claim 1 ,

3. The control unit is When the resistance value of the first resistor is greater than the second reference value and less than the third reference value, The first switching element is turned off by a switching signal, and the second switching element is turned on by a switching signal. The second signal unit turns on the second switching element through a charging permission signal. The electric vehicle charging controller of claim 2 , further comprising:

4. The control unit is A node voltage of a node included in the first signal section or the second signal section is received. and a voltage between the electric vehicle power supply device and the electric vehicle is transmitted according to the magnitude of the node voltage.

10. The electric vehicle charging controller of claim 1, further comprising:

5. The control unit is If the magnitude of the node voltage is within a first voltage range, the electrically connected state is changed to an open state. The electric vehicle charging controller of claim 4 .

6. The control unit is The magnitude of the node voltage is in a second voltage range or a fourth voltage range that is greater than the first voltage range. The electric automatic device according to claim 5, wherein when the electric connection state is included in the range, the electric connection state is determined as poor contact. Car charge controller.

7. The control unit is The magnitude of the node voltage falls within a third voltage range between the second voltage range and the fourth voltage range.

7. The electric vehicle charging device according to claim 6, wherein, when the power supply voltage is included, the electrical connection state is determined to be normal. Power controller.

8. The control unit is When the magnitude of the node voltage is within a fifth voltage range that is greater than the fourth voltage range, The electric vehicle charging controller according to claim 7, wherein the electrical connection state is determined to be an overvoltage state. La.

9. The first signal portion: A first switching element having a first stage connected to the first resistor and a third stage connected to the controller. element; The first stage is connected to the second stage of the first switching element, and the second stage is connected to a ground terminal. a second resistor; a third resistor whose first stage is coupled to the second stage of the second resistor; a fourth resistor, the first stage of which is connected to the second stage of the third resistor, and the second stage of which is connected to the ground terminal; Anti; and The cathode terminal is connected to the second stage of the fourth resistor, and the anode terminal is connected to the ground terminal.

2. The electric vehicle charging controller of claim 1 , further comprising: a first diode

10. The second signal unit is a second switching element having a first stage connected to the first resistor and a third stage connected to the control unit; element; The first stage is connected to the second stage of the second switching element, and the second stage is connected to a ground terminal. The fifth resistance; a sixth resistor, the first stage of which is coupled to the second stage of the fifth resistor; A seventh resistor, the first stage of which is connected to the second stage of the sixth resistor, and the second stage of which is connected to the ground terminal. Anti; and The cathode terminal is connected to the second stage of the seventh resistor, and the anode terminal is connected to the ground terminal.

10. The electric vehicle charging controller of claim 9, further comprising: a second diode

11. The cathode terminal of the first diode and the cathode terminal of the second diode are connected to the control The electric vehicle charging controller of claim 10 , coupled to the power supply unit.

12. the second resistor has a resistance value greater than the fifth resistor; the third resistor has a resistance value greater than that of the sixth resistor; The electrical self-resonator according to claim 11, wherein the fourth resistor has a resistance value smaller than that of the seventh resistor. Vehicle charging controller.

13. A switch device connected to a signal sensing device of an electric vehicle power supply device through a signal line; do a microcontroller coupled to the switch device; The signal sensing device comprises: A first resistor is disposed on the signal line; The switch device comprises: a first stage coupled to the first resistor and a third stage coupled to the microcontroller; a first stage of the first switching element is connected to a second stage of the first switching element; a second resistor coupled to a ground terminal; a third resistor whose first stage is coupled to a second stage of the second resistor; a fourth resistor, the first stage of which is connected to the second stage of the third resistor, and the second stage of which is connected to the ground terminal; and a cathode terminal connected to the second stage of the fourth resistor and an anode terminal connected to the ground terminal. a first signal section including a first diode connected to the first signal section; and a first stage coupled to the first resistor and a third stage coupled to the microcontroller; 2 switching elements; a first stage is connected to a second stage of the second switching element, and the second stage is a fifth resistor coupled to a ground terminal; a sixth resistor, the first stage of which is coupled to the second stage of the fifth resistor; a seventh resistor, the first stage of which is connected to the second stage of the sixth resistor, and the second stage of which is connected to the ground terminal; and a cathode terminal connected to the second stage of the seventh resistor and an anode terminal connected to the ground terminal. a second signal section including a second diode connected to the first signal section.

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