KR20210100471A - Electric vehicle charging controller - Google Patents

Abstract

The present invention relates to an electric vehicle charging controller. The electric vehicle charging controller according to an embodiment of the present invention comprises: a switch device connected to a signal detecting device of the electric vehicle power supply device through a signal line, generating a charging permission signal and transmitting a signal to the signal detecting device; and a control unit for controlling the switch device through a plurality of switching signals. A signal sensing device of the electric vehicle power supply device includes a first resistor disposed on the signal line. The switch device comprises: a first signal unit including a first switching element and configured to turn on a first switching element based on a first switching signal among the plurality of switching signals to generate a charging permission signal; and a second signal unit including a second switching element and generating the charging permission signal by turning on the second switching element based on a second switching signal among the plurality of switching signals. The first signal unit or the second signal unit generates the charging permission signal according to a resistance value of the first resistor. An embodiment is to provide the electric vehicle charging controller with high compatibility.

Description

Electric Vehicle Charge Controller {ELECTRIC VEHICLE CHARGING CONTROLLER}

The embodiment relates to an electric vehicle charge controller.

Eco-friendly vehicles such as Electric Vehicles (EVs) or Plug-In Hybrid Electric Vehicles (PHEVs) use Electric Vehicle Supply Equipment (EVSE) installed at charging stations to charge batteries. .

To this end, an electric vehicle charging controller (EVCC) is mounted in the EV, communicates with the EV and the EVSE, and controls the charging of the electric vehicle.

For example, when the EVCC receives a signal instructing the start of charging from the electric vehicle, it can control to start charging, and when receiving a signal instructing the end of charging from the electric vehicle, it can control to end charging.

The charging method of an electric vehicle may be divided into fast charging and slow charging according to the charging time. In the case of rapid charging, the battery is charged by the DC current supplied from the charger, and in the case of slow charging, the battery is charged by the AC current supplied to the charger. Therefore, a charger used for fast charging is called a fast charger or a DC charger, and a charger used for slow charging is called a slow charger or an AC charger.

Electric vehicle power supplies and electric vehicles perform a multi-step charging sequence while monitoring safety. The electric vehicle power supply device and the electric vehicle transmit and receive signals according to the charging sequence through a plurality of signal lines. Since high voltage power is used to charge electric vehicles, high accuracy is required for signals transmitted and received along signal lines. When a part of the circuit is changed according to the improvement of the charging system and the signal level is changed, the charging sequence is not performed. Therefore, whenever the charging system is improved, there arises a problem of having to change to a component to which the improved circuit is applied.

An embodiment is to provide an electric vehicle charge controller with high compatibility.

An embodiment is to provide an electric vehicle charge controller capable of detecting a signal line connection state between an electric vehicle power supply device and an electric vehicle charge controller.

The problem to be solved in the embodiment is not limited thereto, and it will be said that the purpose or effect that can be grasped from the solving means or embodiment of the problem described below is also included.

An electric vehicle charge controller according to an embodiment of the present invention includes: a switch device connected to a signal sensing device of an electric vehicle power supply device through a signal line, generating a charging permission signal and transmitting the charging permission signal to the signal detecting device; and a control unit for controlling the switch device through a plurality of switching signals, wherein the signal sensing device of the electric vehicle power supply device includes a first resistor disposed on the signal line, and the switch device includes: a first signal unit including one switching element and configured to turn on the first switching element based on a first switching signal among the plurality of switching signals to generate the charging permission signal; and a second signal unit including a second switching element and turning on a second switching element based on a second switching signal among the plurality of switching signals to generate the charging permission signal; The first signal unit or the second signal unit generates the charging permission signal according to the resistance value.

The signal sensing device of the electric vehicle power supply includes a first resistor disposed on the signal line, and the switching device includes the first signal unit or the second signal unit according to a resistance value of the first resistor. The charging permission signal may be generated.

When the resistance value of the first resistor is greater than the first reference value and less than the second reference value, the controller turns on the first switching element through the first switching signal, and the second switching element through the second switching signal may be turned off to control the first signal unit to generate the charging permission signal.

When the resistance value of the first resistor is greater than the second reference value and less than the third reference value, the controller turns off the first switching element through the first switching signal, and a second through the second switching signal A switching element may be turned on to control the second signal unit to generate the charging permission signal.

The control unit receives a node voltage of a node included in the first signal unit or the second signal unit, and makes an electrical connection between the electric vehicle power supply device and the electric vehicle according to the magnitude of the node voltage state can be detected.

The controller may determine the electrical connection state as an open state when the level of the node voltage is included in the first voltage range.

When the level of the node voltage is included in a second voltage range or a fourth voltage range greater than the first voltage range, the controller may determine the electrical connection state as a contact failure.

The controller may determine the electrical connection state as a normal state when the level of the node voltage is included in a third voltage range between the second voltage range and the fourth voltage range.

The controller may determine the electrical connection state as an overvoltage state when the level of the node voltage is included in a fifth voltage range greater than the fourth voltage range.

The first signal unit may include: a first switching element having a first end connected to the first resistor and a third end connected to the control unit; a second resistor having a first end connected to a second end of the first switching element and a second end connected to a ground terminal; a third resistor having a first end connected to a second end of the second resistor; a fourth resistor having a first end connected to a second end of the third resistor and a second end connected to the ground terminal; and a first diode having a cathode terminal connected to the second end of the fourth resistor and an anode terminal connected to a ground terminal.

The second signal unit may include: a second switching element having a first end connected to the first resistor and a third end connected to the control unit; a fifth resistor having a first end connected to a second end of the second switching element and a second end connected to a ground terminal; a sixth resistor having a first end connected to a second end of the fifth resistor; a seventh resistor having a first end connected to a second end of the sixth resistor and a second end connected to the ground terminal; and a second diode having a cathode terminal connected to a second terminal of the seventh resistor and an anode terminal connected to a ground terminal.

A cathode terminal of the first diode and a cathode terminal of the second diode may be connected to the controller.

The second resistor may have a resistance value greater than that of the fifth resistor, the third resistor may have a resistance value greater than the sixth resistor, and the fourth resistor may have a resistance value less than that of the seventh resistor. can

An electric vehicle charge controller according to an embodiment of the present invention includes a switch device connected to a signal sensing device of an electric vehicle power supply device through a signal line; and a microcontroller connected to the switch device, wherein the signal sensing device includes a first resistor disposed on the signal line, wherein the switch device has a first end connected to the first resistor, a first switching element having a third stage connected to the control unit; a second resistor having a first end connected to a second end of the first switching element and a second end connected to a ground terminal; a third resistor having a first end connected to a second end of the second resistor; a fourth resistor having a first end connected to a second end of the third resistor and a second end connected to the ground terminal; and a first diode having a cathode terminal connected to a second end of the fourth resistor and a first diode having an anode terminal connected to a ground terminal; and a second switching element having a first end connected to the first resistor and a third end connected to the control unit; a fifth resistor having a first end connected to a second end of the second switching element and a second end connected to a ground terminal; a sixth resistor having a first end connected to a second end of the fifth resistor; a seventh resistor having a first end connected to a second end of the sixth resistor and a second end connected to the ground terminal; and a second signal unit including a cathode terminal connected to a second terminal of the seventh resistor and a second diode having an anode terminal connected to a ground terminal.

According to the embodiment, it is possible to provide an electric vehicle charge controller with high compatibility.

It is possible to detect the signal line connection state between the electric vehicle power supply and the electric vehicle charge controller.

Various and advantageous advantages and effects of the present invention are not limited to the above, and will be more easily understood in the course of describing specific embodiments of the present invention.

1 is a view for explaining an electric vehicle charging system according to an embodiment of the present invention.
2 is a view showing the configuration of an electric vehicle charging system according to an embodiment of the present invention.
3 is a diagram illustrating a circuit configuration of an electric vehicle charging system according to an embodiment of the present invention.
FIG. 4 is a diagram illustrating an embodiment of a circuit configuration between a fourth signal line of FIG. 3 and a signal sensing device.
5 is a diagram showing another embodiment of the circuit configuration between the fourth signal line of FIG. 3 and the signal sensing device.
6 is a block diagram illustrating an electric vehicle charge controller according to an embodiment of the present invention.
7 is a diagram illustrating a circuit diagram of an electric vehicle charge controller according to an embodiment of the present invention.
8 is a first driving example of a switch device according to an embodiment of the present invention.
9 is a second driving example of the switch device according to the embodiment of the present invention.
10 is a diagram for explaining a voltage detected at a first node of a first signal unit according to an embodiment of the present invention.
11 is a diagram for explaining a voltage detected at a second node of a second signal unit according to an embodiment of the present invention.
12 is a view for explaining a process of detecting an electrical connection state between an electric vehicle power supply device and an electric vehicle charge controller according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

However, the technical spirit of the present invention is not limited to some embodiments described, but may be implemented in various different forms, and within the scope of the technical spirit of the present invention, one or more of the components may be selected among the embodiments. It can be used by combining and substituted.

In addition, terms (including technical and scientific terms) used in the embodiments of the present invention may be generally understood by those of ordinary skill in the art to which the present invention pertains, unless specifically defined and described explicitly. It may be interpreted as a meaning, and generally used terms such as terms defined in advance may be interpreted in consideration of the contextual meaning of the related art.

In addition, the terms used in the embodiments of the present invention are for describing the embodiments and are not intended to limit the present invention.

In the present specification, the singular form may also include the plural form unless otherwise specified in the phrase, and when it is described as "at least one (or one or more) of A and (and) B, C", it is combined with A, B, C It may include one or more of all possible combinations.

In addition, in describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used.

These terms are only used to distinguish the component from other components, and are not limited to the essence, order, or order of the component by the term.

And, when it is described that a component is 'connected', 'coupled' or 'connected' to another component, the component is not only directly connected, coupled or connected to the other component, but also with the component It may also include a case of 'connected', 'coupled' or 'connected' due to another element between the other elements.

In addition, when it is described as being formed or disposed on "above (above) or under (below)" of each component, the top (above) or bottom (below) is one as well as when two components are in direct contact with each other. Also includes a case in which another component as described above is formed or disposed between two components. In addition, when expressed as "upper (upper) or lower (lower)", the meaning of not only an upper direction but also a lower direction based on one component may be included.

1 is a view for explaining an electric vehicle charging system according to an embodiment of the present invention.

An electric vehicle charging system according to an embodiment of the present invention may refer to a system for charging a battery of an electric vehicle that operates by using electric energy as power.

Referring to FIG. 1 , an electric vehicle charging system according to an embodiment of the present invention may include an electric vehicle power supply device (Electric Vehicle Supply Equipment, EVSE, 10) and an electric vehicle (Electric Vehicle, EV, 20).

The electric vehicle power supply device 10 is a facility for supplying AC or DC power, and may be disposed in a charging station or in a home, and may be implemented to be portable. The electric vehicle power supply device 10 may be used interchangeably with a charging station (supply), an AC charging station (AC supply), and a DC charging station (DC supply). The electric vehicle power supply 10 may receive AC or DC power from a main power source. The main power may include a power system and the like. The electric vehicle power supply device 10 may transform or convert AC or DC power supplied from the main power supply to the electric vehicle 20 .

The electric vehicle 20 refers to a vehicle that operates by receiving all or part of energy from a mounted battery. The electric vehicle 20 may include a plug-in hybrid electric vehicle (PHEV) that runs in parallel with an engine using fossil fuel as well as an electric vehicle that runs only with electric energy charged in a battery. The battery provided in the electric vehicle 20 may be charged by receiving power from the electric vehicle power supply device 10 .

2 is a view showing the configuration of an electric vehicle charging system according to an embodiment of the present invention.

An 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), and a junction. A box (100, junction box), an electric vehicle charging controller (200, Electric Vehicle Charging Controller, EVCC), a battery (300), a battery management system (400, Battery Management System, BMS) and an integrated power control device (500, Electric Power) Control Unit, EPCU). A configuration included in the electric vehicle charging system may be divided into a configuration of the electric vehicle power supply device 10 side (EVSE side) and a configuration of the electric vehicle 20 side (EV side). The configuration of the electric vehicle power supply device 10 side may include an electric vehicle power supply device 10 , a cable 50 , and a connector 51 . The configuration on the electric vehicle side may include an inlet 52 , a junction box 100 , an electric vehicle charge controller 200 , a battery 300 , a battery management system 400 , and an integrated power control device 500 . This division is for convenience of description and is not limited thereto.

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 may transmit power supplied from a main power source (eg, a power system) to the electric vehicle 20 . At this time, the electric vehicle power supply device 10 may reduce or convert the power supplied from the main power supply to the electric vehicle 20 . According to an embodiment, when the electric vehicle power supply device 10 supplies AC power to the electric vehicle 20 , the electric vehicle power supply apparatus 10 transforms the AC power supplied from the main power supply to the electric vehicle 20 . ) can be supplied. 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 converts AC power supplied from the main power source into DC power to convert the electric vehicle power to DC power. (20) can be supplied. In order to transform or convert power, the electric vehicle power supply device 10 may include a power conversion device. According to an embodiment, the electric vehicle power supply device 10 may include a rectifier, an isolation transformer, an inverter, a converter, and the like.

The electric vehicle power supply device 10 may 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 may transmit and receive a control signal to and from the electric vehicle 20 and perform a battery charging process. The control signal may include information such as charging preparation, charging end, proximity detection, and the like. The charging control device may include a communication device for communicating with the electric vehicle 20 . The communication device may communicate with the electric vehicle 20 using power line communication (PLC), a controller area network (CAN), or the like. The communication device may be included in the charging control device or may be configured separately.

Next, the cable 50 , the connector 51 , and the inlet 52 electrically connect the electric vehicle power supply 10 and the electric vehicle.

The cable 50 transfers power and signals between the electric vehicle power supply 10 and the electric vehicle 20 . The cable 50 may include a power line transmitting power, a signal line transmitting a control signal related to charging, a ground line connecting the ground, and the like.

The cable 50 is connected to the electric vehicle power supply 10 . According to an embodiment, the electric vehicle power supply device 10 and the cable 50 may be directly connected without a separate connection configuration. According to another embodiment, the electric vehicle power supply device 10 and the cable 50 are a socket-outlet provided in the electric vehicle power supply device 10 and a plug (socket-outlet) provided in the cable 50 . plug) can be connected.

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

The connector 51 and the inlet 52 may include a plurality of pins that may be coupled to each other. For example, one of the plurality of pins may be a pin for a CP port through which a CP (Control Pilot) signal is transmitted between the electric vehicle power supply device 10 and the electric vehicle charge controller 200 , and the other is the connector 51 . ) and a pin for a PD (Proximity Detection) port that detects whether the inlet 52 is in proximity, and another one is a protective earth connected to the protective ground of the electric vehicle power supply 10 and 10. PE) may be a pin for the port. Another one of the plurality of pins may be a pin for driving a motor for opening a fuel flap flap, another one may be a pin for sensing the motor, and another one may be a pin for sensing a temperature, Another one may be a pin for LED sensing, and another one may be a pin for CAN communication. One of the plurality of pins may be a pin for a voltage line applied from a collision detection sensor in the electric vehicle 20 , the other may be a battery pin for supplying charging power to the electric vehicle 20 , and the other is for high voltage protection It can be a pin. However, the number and function of the pins are not limited thereto, and may be variously modified.

The junction box 100 transmits 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 a high voltage, and when it is directly supplied to the battery 300 , the battery 300 may be damaged due to the inrush current. The junction box 100 may include at least one relay to prevent damage to the battery due to inrush current.

The electric vehicle charge controller 200 may control part or all of a process related to charging a battery of the electric vehicle 20 . The electric vehicle charge controller 200 may be referred to as an electric vehicle communication controller (EVCC).

The electric vehicle charge controller 200 may communicate with the electric vehicle power supply device 10 . The electric vehicle charge controller 200 may transmit/receive a control command related to a battery charging process from the electric vehicle power supply device 10 . According to an embodiment, the electric vehicle charge controller 200 may communicate with a charge control device provided in the electric vehicle power supply device 10 , and may transmit/receive control commands related to a battery charging process from the charge control device. .

The electric vehicle charge controller 200 may communicate with the electric vehicle 20 . The electric vehicle charge controller 200 may receive a control command related to a battery charging process from the electric vehicle 20 . According to an embodiment, the electric vehicle charge controller 200 may communicate with the battery management system 400 of the electric vehicle 20 , and may receive a control command related to a battery charging process from the battery management system 400 . there is. According to another embodiment, the electric vehicle charge controller 200 may communicate with the integrated power control device 500 of the electric vehicle 20 , and receive a control command regarding the battery charging process from the integrated power control device 500 . can receive

The electric vehicle charge controller 200 may include a micro controller unit (MCU), a communication device, a relay device, and the like to perform the above function.

The battery management system 400 manages the energy state of the battery 300 in the electric vehicle 20 . The battery management system 400 may monitor the usage status of the battery 300 and perform control for efficient energy distribution. For example, the battery management system 400 may transmit the available power status of the electric vehicle 20 to the vehicle integrated controller and inverter for efficient use of energy. As another example, the battery management system 400 may drive a cooling fan to correct a voltage deviation for each cell of the battery 300 or to maintain the battery 300 at an appropriate temperature.

The integrated power control device 500 is a device for controlling the overall movement of the electric vehicle including the control of the motor. The integrated power control device 500 may include a motor control unit (MCU), a low voltage DC-DC converter (LDC), and a vehicle control unit (VCU). The motor control device may be referred to as an inverter. The motor control device may receive DC power from the battery and convert it into three-phase AC power, and may control the motor according to a command from the vehicle integrated controller. The low voltage DC converter may convert high voltage power into low voltage (eg, 12 [V]) power and supply it to each component of the electric vehicle 20 . The vehicle integrated controller serves to maintain the performance of the system with respect to the electric vehicle 20 as a whole. The vehicle integrated controller may perform various functions such as charging and driving together with various devices such as the motor control device and the battery management system 400 .

3 is a diagram illustrating a circuit configuration of an electric vehicle charging system according to an embodiment of the present invention.

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 .

First, the electric vehicle power supply device 10 includes an overload circuit breaker (RCBO1, RCBO2), a power conversion device (PCS), an insulation monitoring device (CT), a communication device (COM1), a plurality of power lines (DC+, DC-), a plurality of may include signal lines C1 to C6 and a ground line FE. The plurality of power lines DC+ and DC-, the plurality of signal lines C1 to C6 and the ground line FE may extend to the electric vehicle 20 through coupling of the connector 51 and the inlet 52 .

The electric vehicle power supply device 10 may receive AC power from a power system. The received AC power may pass through the overload circuit breaker (RCBO1, RCBO2). The overload circuit breakers RCBO1 and RCBO2 may serve to block the reception of AC power when an overload occurs in the electric vehicle power supply 10 .

AC power passing through the overload circuit breaker (RCBO1) is input to the power conversion device (PCS), and is converted into DC power. The power converter (PCS) supplies DC power to the electric vehicle 20 through two power lines (DC+, DC-). A diode (a) for blocking the reverse voltage from the electric vehicle 20 may be disposed in the first power line (DC+) of the two power lines (DC+, DC-), and the electric vehicle in the second power line (DC-) A fuse u may be disposed to prevent damage due to overvoltage applied from (20).

The insulation monitoring device (CT) may be disposed between the two power lines (DC+, DC-) and the ground. The insulation monitoring device CT may monitor the insulation state of the two power lines DC+ and DC-.

The first signal line C1 and the second signal line C2 may mean signal lines indicating a start/stop state of the electric vehicle power supply device 10 . The first signal line C1 and the second signal line C2 are the charging sequence signals such as ready to charge and end of charge from the electric vehicle power supply 10 to the electric vehicle 20 ( charge sequence signal) can be transmitted. To this end, a power of 12 [V] may be connected to one end of the first signal line C1 , and a ground may be connected to one end of the second signal line C2 . In addition, the two switch devices d1 and d2 may be respectively disposed on the first signal line C1 and the second signal line C2 . In the electric vehicle power supply device 10 , the two switch devices d1 and d2 may transmit a charging sequence signal to the electric vehicle through an on-off operation.

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

The fourth signal line C4 may mean a signal line for approving charging permission for the electric vehicle 20 . The fourth signal line C4 may transmit a control signal such as charging start or charging stop from the electric vehicle 20 to the electric vehicle power supply 10 . The fourth signal line C4 is connected to the signal detecting device j, and the signal detecting device j may detect a control signal transmitted through the fourth signal line C4.

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 .

Next, the electric vehicle may include the junction box 100 , the electric vehicle charge controller 200 , and the battery 300 . The electric vehicle 20 may include a plurality of power lines DC+ and DC-, a plurality of signal lines C1 to C6 and a ground line FE.

The junction box 100 may be connected to two power lines (DC+, DC-). The junction box 100 may include two contactors c disposed on each of the two power lines DC+ and DC-. The two contactors may be turned on and off by the electric vehicle charge controller 200 . The junction box 100 may be connected to the battery 300 through two power lines (DC+, DC-), and transfers the DC power received from the electric vehicle power supply 10 to the battery 300 to perform charging. can do.

The electric vehicle charge controller 200 may include a relay device (e), a plurality of signal detection devices (f, g, h), a switch (k), and a communication device (COM2). The electric vehicle charge controller 200 may be connected to a plurality of signal lines C1 to C6 and a ground line FE.

The relay device (e) may be disposed 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 . In this case, 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) may control the opening and closing of the two contactors (c) through an opening/closing operation.

The first signal detecting device f and the second signal detecting device g are respectively connected to the first signal line C1 and the second signal line C2. The two signal sensing devices f and g may detect a signal generated when the two switch devices d1 and d2 provided in the electric vehicle power supply device 10 are turned on. The two signal sensing devices f and g may transmit the sensed signal to a microcontroller or an integrated vehicle controller included in the electric vehicle charge controller 200 .

The third signal sensing device h is connected to the third signal line C3. The third signal detecting device h may detect a signal for detecting a connection state between the connector 51 and the inlet 52 .

The switch k is connected to the fourth signal line C4. When the switch k is turned on, a signal indicating the start of charging may be transmitted to the electric vehicle power supply 10 .

The communication device COM2 is connected to the fifth signal line C5 and the sixth signal line C6 . The communication device COM2 may communicate with the communication device COM1 through the fifth signal line C5 and the sixth signal line C6 .

FIG. 4 is a diagram illustrating an embodiment of a circuit configuration between a fourth signal line of FIG. 3 and a signal sensing device. 5 is a diagram showing another embodiment of the circuit configuration between the fourth signal line of FIG. 3 and the signal sensing device.

4 may be a circuit configuration in CHAdeMO 0.9, which is a standard charging standard for an electric vehicle. Referring to FIG. 4 , the signal sensing device j connected to the fourth signal line C4 in the electric vehicle power supply 10 may include an optocoupler and a first resistor RA. A voltage of 12 [V] may be connected to a first end of the optocoupler, and a first resistor may be connected to a second end of the optocoupler. The fourth signal line C4 may be connected to the switch device k of the electric vehicle charge controller 200 through the pin 6 of the coupler. In this case, the size of the first resistor RA should be 264 [Ω] or less, and the current flowing through the fourth signal line C4 should be 50 [mA] or less.

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

As described above, in the case of the circuit configuration described with reference to FIGS. 4 and 5 , the maximum current allowed by the fourth signal line C4 is different from each other. Accordingly, the electric vehicle charge controller 200 is not compatible with each other in CHAdeMO 0.9 and CHAdeMO 1.0, which are electric vehicle standard specifications. In CHAdeMO 0.9 and CHAdeMO 1.0, which are the electric vehicle standard specifications, the electric vehicle needs to have different electric vehicle charge controllers 200 to be able to charge the battery.

6 is a block diagram illustrating an electric vehicle charge controller according to an embodiment of the present invention.

Referring to FIG. 6 , the electric vehicle charge controller 200 according to an embodiment of the present invention includes a switch device 210 and a control unit 220 , and the switch device 210 includes a first signal unit 211 and a second signal unit 211 . It includes two signal units 212 .

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

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

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 a first switching signal among the plurality of switching signals output by the control unit 220 .

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 a second switching signal among the plurality of switching signals output by the control unit 220 .

The first signal unit 211 and the second signal unit 212 selectively operate. That is, when the first signal unit 211 generates the charging permission signal, the second signal unit 212 does not generate the charging permission signal. Conversely, when the first signal unit 211 does not generate the charging permit signal, the second signal unit 212 generates the charging permit 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.

The controller 220 controls the switch device 210 through a plurality of switching signals. The controller 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.

When the resistance value of the first resistor is greater than the first reference value and less than the second reference value, the controller 220 turns on the first switching element through the first switching signal and turns on the second switching element through the second switching signal It may be turned off to control the first signal unit 211 to generate a charging permission signal.

When the resistance value of the first resistor is greater than the second reference value and less than the third reference value, the controller 220 turns off the first switching element through the first switching signal, and turns off the second switching element through the second switching signal It is turned on to control the second signal unit 212 to generate a charging permission signal.

The control unit 220 receives the node voltage of the first signal unit 211 or the second signal unit 212 and detects an electrical connection state between the electric vehicle power supply and the electric vehicle according to the magnitude of the node voltage. can

As an embodiment, when the magnitude of the node voltage is included in the first voltage range, the controller 220 may determine the electrical connection state as an open state. As an embodiment, when the magnitude of the node voltage is included in the second voltage range or the fourth voltage range greater than the first voltage range, the controller 220 may determine the electrical connection state as a contact failure. As an embodiment, when the magnitude of the node voltage is included in the third voltage range between the second voltage range and the fourth voltage range, the controller 220 may determine the electrical connection state as a normal state. As an embodiment, when the magnitude of the node voltage is included in the fifth voltage range greater than the fourth voltage range, the controller 220 may determine the electrical connection state as an overvoltage state.

The controller 220 may transmit the detection result of the electrical connection state to the electric vehicle power supply device. The controller 220 may transmit the detection result of the electrical connection state to a battery management system in the electric vehicle, an integrated power management device, and the like. As another example, the controller 220 may transmit the detection result of the electrical connection state to the user terminal.

The controller 220 may be implemented as a microcontroller (MCU).

7 is a diagram illustrating a circuit diagram of an electric vehicle charge controller according to an embodiment of the present invention.

The electric vehicle charge controller 200 according to the embodiment of the present invention includes a switch device 210 and a controller 220 , and the switch device 210 includes a first signal unit 211 and a second signal unit 212 . includes

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

The first switching element Q1 has a first terminal connected to the first resistor RA of the electric vehicle power supply 10 . The second end of the first switching element Q1 is connected to the first end of the second resistor RB. The third terminal of the first switching element Q1 is connected to the controller 220 . The first switching element Q1 may be a bipolar junction transistor (BJT). The first switching element Q1 may include a collector terminal, an emitter terminal, and a base terminal. The collector terminal of the first switching element Q1 may be connected to the first resistor RA. An emitter terminal of the first switching element Q1 may be connected to a first terminal of the second resistor RB. The base terminal of the second switching element Q2 may be connected to the controller 220 .

A first end of the second resistor RB is connected to a second end of the first switching element Q1. A second end of the second resistor RB is connected to a ground terminal. A second end of the second resistor RB may be connected to a first end of the third resistor RC.

A first end of the third resistor RC is connected to a second end of the second resistor RB. A first end of the third resistor RC may be connected to a ground terminal. A second end of the third resistor RC may be connected to a first end of the fourth resistor RD. A second end of the third resistor RC may be connected to the cathode terminal of the first diode D1. A second end of the third resistor RC may be connected to the controller 220 .

A first end of the fourth resistor RD is connected to a second end of the third resistor RC. The fourth resistor RD may have a first terminal connected to the cathode terminal of the first diode D1. A first end of the fourth resistor RD may be connected to the controller 220 . A second end of the fourth resistor RD is connected to a ground terminal.

The cathode terminal of the first diode D1 is connected to the second terminal of the fourth resistor RD. The first diode D1 has a cathode terminal connected to the controller 220 . The first diode D1 has an anode terminal connected to a ground terminal.

As described above, the second end of the third resistor RC, the first end 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 may receive a node voltage of the first node.

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 .

The second switching element Q2 has a first terminal connected to the first resistor RA of the electric vehicle power supply 10 . A second end of the second switching element Q2 is connected to a first end of the fifth resistor RE. The third end of the second switching element Q2 is connected to the control unit 220 . The second switching element Q2 may be a bipolar junction transistor. The second switching element Q2 may include a collector terminal, an emitter terminal, and a base terminal. The collector terminal of the second switching element Q2 may be connected to the first resistor RA. The emitter terminal of the second switching element Q2 may be connected to the first terminal of the fifth resistor RE. The base terminal of the second switching element Q2 may be connected to the controller 220 .

A first end of the fifth resistor RE is connected to a second end of the second switching element Q2. A second terminal of the fifth resistor RE is connected to a ground terminal. A second end of the fifth resistor RE may be connected to a first end of the sixth resistor RF.

A first end of the sixth resistor RF is connected to a second end of the fifth resistor RE. A first end of the sixth resistor RF may be connected to a ground terminal. A second end of the sixth resistor RF may be connected to a first end of the seventh resistor RG. A second end of the sixth resistor RF may be connected to the cathode terminal of the second diode D2 . A second end of the sixth resistor RF may be connected to the controller 220 .

A first end of the seventh resistor RG is connected to a second end of the sixth resistor RF. A first terminal of the seventh resistor RG may be connected to a cathode terminal of the second diode D2. A first end of the seventh resistor RG may be connected to the controller 220 . A second terminal of the seventh resistor RG is connected to a ground terminal.

The cathode terminal of the second diode D2 is connected to the second terminal of the seventh resistor RG. The second diode D2 has a cathode terminal connected to the controller 220 . The second diode D2 has an anode terminal connected to a ground terminal.

As described above, the second end of the sixth resistor RF, the first end 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 may receive a node voltage of the second node.

Table 1 below shows resistance values of the first to seventh resistors RA to RG according to an exemplary embodiment of the present invention.

resistance Resistance [Ω] resistance Resistance [Ω] first resistor (RA) 1000 or 264 second resistor (RB) 200 5th resistor (RE) 1000 Third resistor (RC) 1000 6th resistor (RF) 10000 4th resistor (RD) 10000 7th resistor (RG) 2400

Referring to Table 1, the first resistor RA of the electric vehicle power supply 10 may have a resistance value of 1k [Ω] or 264 [Ω].

The first signal unit 211 and the second signal unit 212 may have circuit structures corresponding to each other. The second resistor RB may correspond to the fifth resistor RE, the third resistor RC may correspond to the sixth resistor RF, and the fourth resistor RD may correspond to the seventh resistor RG. there is. However, resistance values of the corresponding resistors may be different. This is because the control unit maintains the same node voltage at the first node or the second node depending on the connection state even though the first signal unit 211 and the second signal unit 212 selectively operate according to the resistance value of the first resistor RA. (220) is to be input.

The second resistor RB may have a higher resistance than the fifth resistor RE. The second resistance RB of the first signal unit 211 may have a resistance value of 200 [Ω], and the fifth resistance RE of the second signal unit 212 may be 1k[Ω] greater than 200 [Ω]. Ω].

The third resistor RC may have a higher resistance than the sixth resistor RF. The third resistor RC of the first signal part 211 may have a resistance value of 1k [Ω], and the sixth resistor RF of the second signal part 212 may have a resistance value of 10k[Ω] greater than 1000 [Ω]. Ω].

The fourth resistor RD may have a smaller value than the seventh resistor RG. The fourth resistor RD of the first signal part 211 may have a resistance value of 10k[Ω], and the seventh resistor RG of the second signal part 212 may be 2.4k less than 10k[Ω]. It can have a resistance value of [Ω].

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

The first driving example shown in FIG. 8 represents a current flow when a charging permission signal is generated through the first signal unit 211 .

The electric vehicle power supply device 10 may include a signal sensing device including a first resistor RA and a predetermined circuit for sensing a charging permission signal. A predetermined circuit is connected to a first terminal 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 a predetermined circuit, a voltage drop of the voltage source may occur due to the predetermined circuit.

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

In the case of the first diode D1, since the cathode terminal is connected to the second terminal of the second resistor RB, the current I1 does not flow. However, when the voltage applied to the first diode D1 exceeds the breakdown voltage of the first diode D1, the electrical resistance is broken and the current I1 flows. According to an embodiment, when a transient current such as a rush current is applied to the first signal unit 211 and a breakdown voltage is applied to the first diode D1 , the electrical resistance of the first diode D1 is destroyed and the first diode D1 is grounded. A current I1 flows through the terminal. This is to prevent the controller 220 connected to the cathode terminal of the first diode D1 from being damaged by an excessive current such as a rush current.

9 is a second driving example of the switch device according to the embodiment of the present invention.

The electric vehicle power supply device 10 may include a signal sensing device including a first resistor RA and a predetermined circuit for sensing a charging permission signal. A predetermined circuit is connected to a first terminal 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 a predetermined circuit, a voltage drop of the voltage source may occur due to the predetermined circuit.

In the second driving example, the first switching element Q1 is turned off and the second switching element Q2 is turned on. Accordingly, the current I2 by 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. Accordingly, the signal sensing device of the electric vehicle power supply device 10 detects the charging permission signal generated by the fifth to seventh resistors RG.

In the case of the second diode D2, since the cathode terminal is connected to the second terminal of the second resistor RB, the current I2 does not flow. However, when the voltage applied to the second diode D2 exceeds the breakdown voltage of the second diode D2 , the electrical resistance is broken and the current I2 flows. According to an embodiment, when a transient current such as an inrush current is applied to the second signal unit 212 and a breakdown voltage is applied to the second diode D2 , the electrical resistance of the second diode D2 is destroyed and the ground Current flows through the terminal. This is to prevent the controller 220 connected to the cathode terminal of the second diode D2 from being damaged by an excessive current such as a rush current.

10 is a diagram for explaining a voltage detected at a first node of a first signal unit according to an embodiment of the present invention.

10 shows a circuit configuration when the first switching signal of the first signal part is turned on and the second switching signal of the second signal part is turned off.

The controller may receive 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.

Equation 1 below represents the node voltage Va detected at the first node a.

Table 2 below shows resistance values and voltage values according to an exemplary embodiment.

resistance Resistance [Ω] Voltage Voltage value [V] first resistor (RA) 1000 Voltage (Vs) 12 second resistor (RB) 200 - - Third resistor (RC) 1000 - - 4th resistor (RD) 10000 - -

As shown in Table 2, the voltage (Vs) is 12 [V], the first resistor (RA) is 1k [Ω], the second resistor (RB) is 200 [Ω], the third resistor (RC) is 1k When [Ω] and the fourth resistor RD are 10k [Ω], according to Equation 1, the node voltage Va of the first node a becomes approximately 1.8 [V]. That is, when the first receiver operates normally to generate a charging permission signal, the controller may receive a node voltage Va of approximately 1.8 [V].

11 is a diagram for explaining a voltage detected at a second node of a second signal unit according to an embodiment of the present invention.

11 shows a circuit configuration when the first switching signal of the first signal part is turned off and the second switching signal of the second signal part is turned on.

The controller may receive 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.

Equation 1 below represents the node voltage Vb detected at the second node b.

Table 3 below shows resistance values and voltage values according to an exemplary embodiment.

resistance Resistance [Ω] Voltage Voltage value [V] first resistor (RA) 264 Voltage (VS) 12 5th resistor (RE) 1000 - - 6th resistor (RF) 10000 - - 7th resistor (RG) 2400 - -

As shown in Table 2, the voltage (Vs) is 12 [V], the first resistor (RA) is 264 [Ω], the fifth resistor (RE) is 1k [Ω], the sixth resistor (RF) is 1k When [Ω] and the seventh resistor RG are 2.4 k[Ω], according to Equation 1, the node voltage Vb of the first node becomes approximately 1.8 [V]. That is, when the second receiver operates normally to generate a charging permission signal, the controller may receive a node voltage Vb of approximately 1.8 [V].

12 is a view for explaining a process of detecting an electrical connection state between an electric vehicle power supply device and an electric vehicle charge controller according to an embodiment of the present invention.

The controller may detect an electrical connection state between the electric vehicle power supply device and the electric vehicle charge controller based on the voltage level of the node voltage input from the first receiver or the second receiver.

When the magnitude of the node voltage is included in the first voltage range, the controller may determine the electrical connection state as an open case. According to an embodiment, the first voltage range may mean a range greater than the zeroth voltage V0 and smaller than the first voltage V1. The zeroth voltage V0 may be 0 [V].

When the magnitude of the node voltage is included in the second voltage range greater than the first voltage range, the controller may determine the electrical connection state as an out of case. According to an embodiment, the first voltage range means a range greater than 0 [V] and less than the first voltage V1, and the second voltage range is greater than the first voltage V1 and greater than the second voltage V2. It can mean a small range.

When the level of the node voltage is included in the third voltage range greater than the second voltage range, the controller may determine the electrical connection state as a normal status. According to an embodiment, the second voltage range means a range that is greater than the first voltage V1 and less than the second voltage V2, and the third voltage range is greater than the second voltage V2 and the third voltage V3. ) can mean a smaller range. The third voltage range may be a range including a value of 1.8 [V] that may be detected when the first receiver or the second receiver normally operates.

When the magnitude of the node voltage is included in the fourth voltage range greater than the third voltage range, the controller may determine the electrical connection state as an out of case. According to an embodiment, the third voltage range means a range that is greater than the second voltage V2 and less than the third voltage V3, and the fourth voltage range is greater than the third voltage V3 and the fourth voltage V4. ) can mean a smaller range.

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

Although the embodiment has been described above, it is only an example and does not limit the present invention, and those of ordinary skill in the art to which the present invention pertains are not exemplified above in a range that does not depart from the essential characteristics of the present embodiment. It will be appreciated that various modifications and applications are possible. For example, each component specifically shown in the embodiment can be implemented by modification. And differences related to such modifications and applications should be construed as being included in the scope of the present invention defined in the appended claims.

10: electric vehicle power supply
20: electric vehicle
200: electric vehicle charge controller
210: switch device
211: first signal unit
212: second signal unit
220: control unit

Claims (13)

a switch device connected to a signal detecting device of the electric vehicle power supply through a signal line, generating a charging permission signal and transmitting the signal to the signal detecting device; And
Including; a control unit for controlling the switch device through a plurality of switching signals,
The signal detection device of the electric vehicle power supply device,
a first resistor disposed on the signal line;
The switch device is
a first signal unit including a first switching element and configured to turn on the first switching element based on a first switching signal among the plurality of switching signals to generate the charging permission signal; and
a second signal unit including a second switching element and turning on a second switching element based on a second switching signal among the plurality of switching signals to generate the charging permission signal; and
The electric vehicle charge controller configured to generate the charging permission signal by the first signal unit or the second signal unit according to a resistance value of the first resistor. According to claim 1,
The control unit is
When the resistance value of the first resistor is greater than the first reference value and less than the second reference value, the first switching element is turned on through the first switching signal, and the second switching element is turned off through the second switching signal. An electric vehicle charging controller for controlling the first signal unit to generate the charging permission signal. 3. The method of claim 2,
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 through the first switching signal, and the second switching element is turned on through the second switching signal to control the second signal unit to generate the charging permission signal. According to claim 1,
The control unit is
receiving a node voltage of a node included in the first signal unit or the second signal unit, and detecting an electrical connection state between the electric vehicle power supply device and the electric vehicle according to the magnitude of the node voltage Electric vehicle charge controller. 5. The method of claim 4,
The control unit is
An electric vehicle charge controller configured to determine the electrical connection state as an open state when the level of the node voltage is included in a first voltage range. 6. The method of claim 5,
The control unit is
When the level of the node voltage is included in a second voltage range or a fourth voltage range greater than the first voltage range, the electric vehicle charge controller determines the electrical connection state as a contact failure. 7. The method of claim 6,
The control unit is
When the level of the node voltage is included in a third voltage range between the second voltage range and the fourth voltage range, the electric vehicle charge controller determines the electrical connection state as a normal state. 8. The method of claim 7,
The control unit is
When the level of the node voltage is included in a fifth voltage range greater than the fourth voltage range, the electric vehicle charge controller determines the electrical connection state as an overvoltage state. According to claim 1,
the first signal unit;
a first switching element having a first end connected to the first resistor and a third end connected to the control unit;
a second resistor having a first end connected to a second end of the first switching element and a second end connected to a ground terminal;
a third resistor having a first end connected to a second end of the second resistor;
a fourth resistor having a first end connected to a second end of the third resistor and a second end connected to the ground terminal; and
and a first diode having a cathode terminal connected to a second terminal of the fourth resistor and an anode terminal connected to a ground terminal. 10. The method of claim 9,
The second signal unit,
a second switching element having a first end connected to the first resistor and a third end connected to the control unit;
a fifth resistor having a first end connected to a second end of the second switching element and a second end connected to a ground terminal;
a sixth resistor having a first end connected to a second end of the fifth resistor;
a seventh resistor having a first end connected to a second end of the sixth resistor and a second end connected to the ground terminal; and
and a second diode having a cathode terminal connected to a second terminal of the seventh resistor and an anode terminal connected to a ground terminal. 11. The method of claim 10,
The cathode terminal of the first diode and the cathode terminal of the second diode are connected to the controller. 12. The method of claim 11,
The second resistor has a resistance value greater than that of the fifth resistor,
The third resistor has a resistance value greater than that of the sixth resistor,
The fourth resistor may have a smaller resistance value than the seventh resistor. a switch device connected to the signal sensing device of the electric vehicle power supply device through a signal line; And
Including; a microcontroller connected to the switch device;
The signal detection device,
a first resistor disposed on the signal line;
The switch device is
a first switching element having a first end connected to the first resistor and a third end connected to the microcontroller; a second resistor having a first end connected to a second end of the first switching element and a second end connected to a ground terminal; a third resistor having a first end connected to a second end of the second resistor; a fourth resistor having a first end connected to a second end of the third resistor and a second end connected to the ground terminal; and a first diode having a cathode terminal connected to a second terminal of the fourth resistor and a first diode having an anode terminal connected to a ground terminal; And
a second switching element having a first end connected to the first resistor and a third end connected to the microcontroller; a fifth resistor having a first end connected to a second end of the second switching element and a second end connected to a ground terminal; a sixth resistor having a first end connected to a second end of the fifth resistor; a seventh resistor having a first end connected to a second end of the sixth resistor and a second end connected to the ground terminal; and a second diode having a cathode terminal connected to a second end of the seventh resistor and a second diode having an anode terminal connected to a ground terminal.

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