Apparatus and method for charging electric vehicle

Abstract

The invention relates to an apparatus and a method for charging an electric vehicle. An exemplary apparatus for charging an electric vehicle includes a charging port, a detection block configured to generate a detection signal by detecting whether a charging connector of a charging facility is connected to the charging port, a charging controller, and a relay box; the charging controller is configured to perform charging control using a first charging mode or a second charging mode according to a detection signal; the relay box is configured to separate charging power supplied from a charging facility into DC power and AC power according to charging control.

Description

Technical Field

[0001] The present invention relates to a technology for charging an electric vehicle. Background Art

[0002] In North America, electric vehicle charging operations are currently roughly divided into two types: the charging type of the Combined Charging System (CCS) and the charging type of the North American Charging Standard (NACS). The charging type of CCS ("CCS mode") meets standards such as the Society of Automotive Engineers (SAE) J1772, the International Electrotechnical Commission (IEC) 62196, IEC61815, and the International Organization for Standardization (ISO) 15118. The CCS mode enables AC / DC charging to be performed based on a high level of communication between an electric vehicle and a charging device.

[0003] Tesla independently sets and manages charging connectors and communication specifications, and has established independent charging infrastructure, such as the Supercharger network. As of 2023, the charging infrastructure currently established in North America includes 50% CCS mode, 30% Tesla mode, and 20% CHAdeMo mode.

[0004] However, in recent years, the Tesla-type charging mode has been selected as the standard mode for NACS. Many global automakers (such as GM and Ford) have announced plans to adopt the Tesla-type charging mode ("NACS mode") instead of the CCS mode.

[0005] In addition, local companies that build charging infrastructure also plan to supply charging equipment that complies with the Tesla-type charging mode (NACS mode). Therefore, electric vehicles planned to be sold in North America need to comply with the Tesla-type charging mode.

[0006] Therefore, it should be noted that the charging equipment needs to comply with the standards of the Combined Charging System (CCS mode) and the North American Charging Standard (NACS mode). Summary of the invention

[0007] The present invention relates to a technology for charging an electric vehicle. Specific embodiments relate to such an apparatus and method for charging an electric vehicle, which is applicable to the Combined Charging System (CCS) and the North American Charging Standard (NACS).

[0008] One embodiment of the present invention that solves the problems in the art provides an apparatus and method for charging an electric vehicle, which is applicable to CCS and NACS.

[0009] Another embodiment of the present invention provides an apparatus and method for charging an electric vehicle that can comply with NACS.

[0010] Yet another embodiment of the present invention provides an apparatus and method for charging an electric vehicle, which is capable of performing a charging operation according to determination of an AC charging mode or a DC charging mode.

[0011] In order to achieve the above-mentioned embodiment, according to one embodiment of the present invention, there is provided an apparatus for charging an electric vehicle, which can comply with the standards of CCS and NACS.

[0012] A device for charging an electric vehicle may include: a charging port, a detection block, a charging controller and a relay box, wherein the detection block generates a detection signal by detecting whether a charging connector of a charging facility is connected to the charging port; the charging controller performs charging control using a first charging mode or a second charging mode according to the detection signal; and the relay box separates the charging power supplied from the charging facility into DC power and AC power according to the charging control.

[0013] In the apparatus, the first charging mode may include a mode compliant with a North American charging standard (NACS mode), and the second charging mode may include a mode compliant with a combined charging system standard (CCS mode).

[0014] In addition, the detection block may include a first detector and a second detector, wherein the first detector is installed at a first charging port that complies with the NACS mode and detects a connection with a charging connector; the second detector is installed at a second charging port that complies with the CCS mode and detects a connection with a charging connector.

[0015] In the device, the relay box may include an alternating current (AC) relay and a direct current (DC) relay, wherein the AC relay is connected to an AC power line and allows or prohibits the flow of AC power; and the DC relay is configured in parallel with the AC relay and connected to the DC power line and allows or prohibits the flow of DC power.

[0016] In the apparatus, the AC relay and the DC relay may be arranged in the AC power line and the DC power line, respectively, and the AC relay and the DC relay may each include a plurality of switching elements.

[0017] In the apparatus, in the case where charging control is performed using the second charging mode, the charging control unit may keep the line from the second charging port compliant with the CCS mode connected to the connection point in the relay box by turning off the AC relay and the DC relay.

[0018] In the device, when charging control is not performed using one of the first charging mode and the second charging mode, the charging control unit may keep the AC relay and the DC relay off.

[0019] In the device, after a first charging port compliant with a NACS mode or a second charging port compliant with a CCS mode is normally connected to a charging connector, a charging control unit may perform AC charging by turning on an AC relay or perform DC charging by turning on a DC relay based on a comparison result of a control pilot (CP) duty ratio with a preset reference value and based on whether a specific communication scheme is supported.

[0020] In the apparatus, as a result of comparison of the CP duty ratio with a preset reference value, AC charging may be performed based on low-level communication or high-level communication.

[0021] In the device, depending on whether a specific communication scheme is supported, one of AC charging or DC charging may be performed, or only DC charging may be directly performed.

[0022] The device may further include a junction box that allows or prohibits direct current power from flowing into the battery.

[0023] In the apparatus, a junction box may be arranged between the relay box and the battery, the junction box including a first wiring switch element connected to the DC+ line and a second wiring switch element connected to the DC- line.

[0024] The apparatus may further include an on-board charger that receives AC power and converts the received AC power into DC power.

[0025] The device may further include a first contact point sensor and a second contact point sensor, the first contact point sensor detecting an open state or a closed state of a first charging door installed at a charging portion of a charging port that complies with a first charging mode; the second contact point sensor detecting an open state or a closed state of a second charging door installed at a charging portion of a charging port that complies with a second charging mode.

[0026] In the device, the charging control unit may end the charging control when detecting that the second charging gate is in an open state when the charging control is performed using the first charging mode or when detecting that the first charging gate is in an open state when the charging control is performed using the second charging mode.

[0027] According to another embodiment of the present invention, a method for charging an electric vehicle is provided, the method comprising: a detection block generating a detection signal by detecting whether a charging connector of a charging facility is connected to a charging port; a charging control unit performing charging control using a first charging mode or a second charging mode according to the detection signal; and a relay box separating the charging power supplied from the charging facility into DC power and AC power according to the charging control.

[0028] In the method, generating a detection signal by the detection block may include: detecting a connection with a charging connector by a first detector, the first detector being installed at a first charging port that complies with a NACS mode; and detecting a connection with a charging connector by a second detector, the second detector being installed at a second charging port that complies with a CCS mode.

[0029] In the method, performing charging control by the charging control unit may include: when performing charging control using the second charging mode, keeping the line from the second charging port compliant with the CCS mode connected to the connection point in the relay box by turning off the AC relay and the DC relay.

[0030] In the method, performing the charging control by the charging control unit may include keeping the AC relay and the DC relay turned off by the charging control unit when the charging control is not performed using one of the first charging mode and the second charging mode.

[0031] Embodiments of the present invention may be applicable to the standards of CCS and NACS using a separate high voltage relay box.

[0032] Additionally, embodiments of the present invention may enable charging of NACS compliant electric vehicles using a single high voltage relay box.

[0033] In addition, the embodiment of the present invention may perform a charging operation according to a determination result of whether the AC charging mode or the DC charging mode is available. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a block diagram illustrating an exemplary embodiment of an electric vehicle charging system according to an embodiment of the present invention.

[0035] Figure 2 is a block diagram showing a configuration of a charging device for an electric vehicle, the charging device being configured to be installed in Figure 1 The electric vehicle shown.

[0036] Figure 3 The following table shows the charging standards applicable to North America (NACS). Figure 2 Block diagram showing the detailed configuration of the relay box and junction box.

[0037] Figure 4 is a block diagram showing a detailed configuration of a relay box and a junction box applicable to a combined charging system (CCS) and NACS.

[0038] Figure 5 and Figure 6 is a flowchart of performing charging control by determining an AC charging mode and a DC charging mode according to an exemplary embodiment of the present invention.

[0039] Figure 7 is a flowchart of a communication process between a charging facility and an electric vehicle according to an exemplary embodiment of the present invention. DETAILED DESCRIPTION

[0040] The purpose, features and advantages of the embodiments of the present invention described above will be described in detail with reference to the accompanying drawings, and based on this description, a person skilled in the art will easily realize the technical ideas of the embodiments of the present invention. In the case where the specific description of the known technology associated with the present invention is determined to unnecessarily confuse the nature and purpose of the present invention, its detailed description will be omitted from the description of the embodiments of the present invention.

[0041] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The same reference numerals are used in the drawings to represent the same or similar constituent elements.

[0042] Figure 1 1 is a block diagram of the configuration of the electric vehicle charging system 100. Figure 1 The electric vehicle charging system 100 may be configured to include a charging facility 110 , which is supplied with AC grid power 10 and provides charging power, and an electric vehicle 120 , which is supplied with charging power from the charging facility 110 .

[0043] The charging facility 110 may be an electric vehicle supply equipment (EVSE). Therefore, the charging facility 110 may be configured to include an off-board charger 111, a controller 112, and the like.

[0044] The off-board charger 111 may perform the following functions: being supplied with AC power from the AC grid power 10, converting the AC power into charging power, and then supplying the charging power to the electric vehicle 120. The off-board charger 111 may be a bidirectional charger. To this end, the off-board charger 111 may be configured with a rectifier, a DC power supply, and the like.

[0045] The controller 112 may perform the function of controlling the off-board charger 111. To this end, the controller 112 may be configured to include a microprocessor, a microcomputer, a communication circuit, a memory, a display, an input device, etc. The display may be a touch screen, etc. Therefore, the display may be used as an input device and an output device. The input device may be a button, a microphone, etc.

[0046] Figure 2 1 is a block diagram showing a configuration of a charging device 200 for an electric vehicle 120 according to an exemplary embodiment of the present invention, the charging device 200 being configured to be installed in Figure 1 The electric vehicle 120 is shown. Figure 2 , the charging device 200 for the electric vehicle 120 may be configured to include a charging port 210 , a detection block 220 , a charging control unit 230 , a relay box 240 , a junction box 250 , an on-board charger 260 , and the like.

[0047] The charging port 210 can be connected to the charging connector 20 of the charging facility 110, and can perform the function of transmitting charging power and / or control signals. The charging port 210 can be configured as a charging port that complies with the standard of the combined charging system (CCS mode) and / or a charging port that complies with the North American charging standard (NACS mode). Of course, the charging port 210 can have different forms of slow charging mode and fast charging mode.

[0048] A plurality of terminals (not shown) fixed to a plurality of pins (not shown) formed in the charging connector 20 of the charging facility 110 may be configured to be formed in the charging port 210. Of course, the pins and the terminals may be formed in a manner that changes according to the CCS mode and / or the NACS mode.

[0049] The detection block 220 may perform the following functions: detect whether the charging connector 20 is correctly connected to the charging port 210 and then generate a detection signal. When the charging connector 20 is not correctly engaged with the charging port 210, the detection block 220 may perform the following functions: detect the non-engagement and transmit the detection signal to the charging control unit 230.

[0050] Of course, multiple detection blocks 220 can be set for configuration. That is, the detection block 220 can be configured to include: a first detector 221 and a second detector 222, wherein the first detector 221 is installed at a charging port that complies with the NACS mode, and the second detector 222 is installed at a charging port that complies with the CCS mode. A proximity sensor, an infrared sensor, or a similar sensor that utilizes the distance difference between the charging connector 20 and the charging port 210 can also be used as the first detector 221 and the second detector 222. Of course, the first detector 221 and the second detector 222 can be current sensors or voltage sensors that can respectively detect a current or voltage flowing in a certain amount due to the connection between the connector 20 and the charging port 210.

[0051] The charging control unit 230 may perform the following functions: perform charging control in accordance with the CCS mode or the NACS mode according to the detection signal. That is, the relay box 240 and / or the junction box 250 may be controlled according to whether the charging port 210 is in accordance with the CCS mode or the NACS mode. To this end, the charging control unit 230 may be configured to include a microcomputer, a microprocessor, an electronic circuit, a communication circuit, a memory, and the like.

[0052] The memory can be configured as a combination of non-volatile memory and volatile memory. Examples of non-volatile memory include solid state drives (SSDs), hard disk drives, flash memory, electrically erasable programmable read-only memory (EEPROM), static RAM (SRAM), ferroelectric RAM (FRAM), phase change RAM (PRAM), magnetic RAM (MRAM), etc. Examples of volatile memory include dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate SDRAM (DDR-SDRAM), etc.

[0053] According to charging control of the charging control unit 230 , the relay box 240 may perform the following functions: separate the charging power supplied from the charging facility 110 into DC power and AC power, and relay the DC power and AC power to the junction box 250 and / or the on-board charger 260 .

[0054] The junction box 250 may perform the following functions: allow or prohibit the DC power from flowing into the battery.

[0055] The onboard charger 260 may perform the following functions: being supplied with AC power and converting the AC power into DC power for charging. Generally, the charging operation of an electric vehicle may be divided into two types: a slow charging mode and a fast charging mode. The slow charging mode is a type of battery charging using DC power converted from approximately 20V AC power.

[0056] In contrast, the fast charging mode is a type of battery charging that directly uses DC high voltage without passing through the onboard charger 260. To this end, the onboard charger 260 may be configured to include power factor correction (PFC), an AC-DC converter, a rectifier, and the like.

[0057] Figure 3 The NACS model is shown in Figure 2 The detailed configuration of the relay box 240 and the junction box 250 is shown in FIG. Figure 3 The relay box 240 may be configured with an AC relay 320 for allowing or prohibiting the flow of alternating current power and a DC relay 330 for allowing or prohibiting the flow of direct current power.

[0058] The AC relay 320 and the DC relay 330 may be arranged in parallel with each other to form separate lines. That is, the separate lines formed are an AC power line (indicated by reference numerals 301 and 302) and a DC power line (indicated by reference numerals 303 and 304).

[0059] The AC power lines (301 and 302) are configured with an L1 line 301 and an N line 302. The DC power lines (303 and 304) are configured with a DC- line 303 and a DC+ line 304. The L1 line 301 and the N line 302 are lines for AC power.

[0060] In the NACS charging port 31, the DC+ line can be used in a common manner with the L1 line, and the DC- line can be used in a common manner with the N line. Of course, there are CP, PD, and GND lines, which are connected to the charging control unit 230 through the NACS charging door 30 and the NACS charging port 31. The NACS charging door 30 can be shaped to open and close, and is applied to open and close the NACS charging port 31. Of course, the first contact point sensor 30-1 can be installed on the NACS charging door (i.e., the first charging door) 30. When the NACS charging door 30 is opened or closed, the first contact point sensor 30-1 can send the open state or the closed state to the charging control unit 230, respectively.

[0061] Generally, specifications of a charging connector and a charging port can be shown in Table 1 below.

[0062] Table 1

[0063] L1 AC Power L2 / N AC Power CP Control guidance PD Proximity Detection PE Grounding DC+ Power supply (+) DC- Power supply(-)

[0064] The first switching element 321 and the second switching element 322 for turning on and off are configured to be connected in parallel with each other in the AC relay 320. The first switching element 321 and the second switching element 322 for turning on and off are configured to be connected in parallel with each other in the DC relay 330. The first switching element 321 and / or the second switching element 322 are connected to the charging control unit 230 through the control line 305. Therefore, the charging control unit 230 can turn the first switching element 321 and / or the second switching element 322 on or off.

[0065] Power relays may be mainly used as the first switching element 321 and the second switching element 322. However, the first switching element 321 and the second switching element 322 may not be limited to power relays. Semiconductor switching elements, thyristors, gate turn-off (GTO) thyristors, alternating current triodes (TRIACs), silicon controlled rectifiers (SCRs), integrated circuits, etc. may be used as the first switching element 321 and the second switching element 322. Semiconductor switching elements include field effect transistors (FETs), metal oxide semiconductor FETs (MOSFETs), insulated gate bipolar transistors (IGBTs), power rectifier diodes, etc.

[0066] In particular, semiconductor elements including power metal oxide silicon field effect transistor (MOSFET) elements and the like may be used as the first switching element 321 and the second switching element 322. Unlike conventional MOSFETs, power MOSFET elements operate at high voltage and high current levels and employ a double diffused metal oxide semiconductor (DMOS) structure.

[0067] The operating conditions of the AC relay 320 and the DC relay 330 are shown in Table 2 below.

[0068] Table 2

[0069] DC charging AC charging DC Relay Connect Shutdown AC Relay Shutdown Connect

[0070] like Figure 3 As shown, in the relay box 240, line separation is achieved by AC relay 320 and DC relay 330. In the relay box 240, the output AC line can be converted into a DC power line by the on-board charger 260 and can be connected to the high-voltage battery 310, and the DC line can be connected to the high-voltage battery 310 through the high-voltage junction box 250.

[0071] The AC relay 320 and the DC relay 330 are always in an open state. When AC charging is performed, the AC relay 320 may be turned on, and when DC charging is performed, the DC relay 330 may be turned on.

[0072] The junction box 250 may be disposed between the relay box 240 and the battery 310. The junction box 250 performs a function of allowing or prohibiting DC power from flowing into the battery 310. To this end, the junction box 250 may be configured with a first junction switch element 350-1 and a second junction switch element 350-2 disposed in parallel with each other.

[0073] That is, the first wiring switch element 350 - 1 may be connected to the DC+ line 304 , and the second wiring switch element 350 - 2 may be connected to the DC− line 303 .

[0074] The power relay may be mainly used as the first wiring switch element 350 - 1 and the second wiring switch element 350 - 2 . Therefore, the first wiring switch element 350 - 1 and the second wiring switch element 350 - 2 are each configured with a contact point portion 351 and a coil 352 that operates the contact point portion 351 .

[0075] Of course, semiconductor switching elements, thyristors, gate turn-off (GTO) thyristors, alternating current triodes (TRIACs), silicon controlled rectifiers (SCRs), integrated circuits, etc. can be used as the first wiring switch element 350-1 and the second wiring switch element 350-2. The semiconductor switching elements include field effect transistors (FETs), metal oxide semiconductor FETs (MOSFETs), insulated gate bipolar transistors (IGBTs), power rectifier diodes, etc.

[0076] The first wiring switch element 350-1 and the second wiring switch element 350-2 may be connected to the charging control unit 230 through the control line 305. Therefore, the first wiring switch element 350-1 and the second wiring switch element 350-2 perform an on operation or an off operation according to an on or off signal of the charging control unit 230.

[0077] The battery 310 can be configured by arranging battery cells (not shown) in series and / or in parallel. These battery cells may include high-voltage battery cells for electric vehicles, such as nickel metal battery cells, lithium-ion battery cells, lithium polymer battery cells, lithium-sulfur battery cells, sodium-sulfur battery cells, and solid-state battery cells. Generally, a battery cell refers to a battery with a voltage of 100V or higher, which is used as a power source for driving an electric vehicle. However, the battery cell may not be limited to such a battery. Batteries with a voltage of less than 100V may also be used as a power source.

[0078] Of course, the battery 310 can be configured to include a battery management system (BMS). The BMS is used to improve energy efficiency and extend the service life of the electric vehicle battery by optimizing management. The BMS prevents overcharging and discharging by monitoring battery voltage, current, and temperature, thereby improving the safety and reliability of the battery.

[0079] Figure 42 is a block diagram showing a detailed configuration of a relay box 240 and a junction box 250 applicable to the combined charging system (CCS) standard and the North American charging standard (NACS). Figure 4 , the NACS charging port 31 and the CCS charging port 41 may be configured together. Of course, the CCS charging door (i.e., the second door) 40 may be provided on the side of the CCS charging port 41 in an openable and closable form, so that the CCS charging door opens or closes the CCS charging port 41. A second contact point sensor 40-1 capable of checking the opening or closing of the CCS charging door 40 may also be installed on the CCS charging door 40. When the CCS charging door 40 is opened or closed, the second contact point sensor 40-1 may send the open state or the closed state to the charging control unit 230.

[0080] The first contact point sensor 30-1 and the second contact point sensor 40-1 can each be configured with a magnet and a body. When the magnet and the body are close to each other, the contact point can be turned on (i.e., closed circuit). When the magnet and the body are away from each other, the contact point can be turned off (i.e., open circuit). The first contact point sensor 30-1 and the second contact point sensor 40-1 can each convert these states into signals and send the signals to the charging control unit 230. Of course, an infrared sensor or the like using distance measurement can be used.

[0081] The L1 line, N line, DC- line, and DC+ line of the CCS charging port 41 may be respectively connected to the first to fourth connection points 401 to 404 in the relay box 240. In other words, the L1 line may be connected to the first connection point 401, the N line may be connected to the second connection point 402, the DC- line may be connected to the third connection point 403, and the DC+ line may be connected to the fourth connection point 404.

[0082] Of course, the first connection point 401 can be connected to the L1 line 301 of the AC power line (indicated by reference numerals 301 and 302), and the second connection point 402 can be connected to the N line 302 of the AC power line (indicated by reference numerals 301 and 302). In addition, the third connection point 403 can be connected to the DC- line 303 of the DC power line (indicated by reference numerals 303 and 304), and the fourth connection point 404 can be connected to the DC+ line 304 of the DC power line (indicated by reference numerals 303 and 304).

[0083] Therefore, when the charging control conforming to the NACS mode is performed, the charging control may be ended when the second contact point sensor 40-1 detects the open state of the CCS charging door 40. That is, the charging operation may be ended.

[0084] Of course, when the charging control conforming to the CCS mode is performed, the charging control may also be terminated when the first contact point sensor 30-1 detects the open state of the NACS charging door 30. That is, the charging operation may be terminated.

[0085] In addition, when performing charging control compliant with the CCS mode, AC relay 320 and DC relay 330 may be turned off. L1 line, N line, DC- line and DC+ line of charging port 41 may remain connected to first to fourth connection points 401 to 404 in relay box 240, respectively.

[0086] When charging control that complies with neither the NACS mode nor the CCS mode is performed, the AC relay 320 and the DC relay 330 may remain turned off.

[0087] Figure 5 and Figure 6 is a flowchart of a method for charging an electric vehicle by determining an AC charging mode and a DC charging mode according to an exemplary embodiment of the present invention. Figure 5 , the charging control unit 230 may detect whether the charging connector 20 is connected to the charging port 210 through the detection block 220 (step S510 ).

[0088] Subsequently, the charging control unit 230 may check whether the connection between the charging connector 20 and the charging port 210 is normal through the detection block 220 (step S520 ).

[0089] When the result of the check in step S520 is that the connection is abnormal, a warning signal may be output to the driver and steps S510 and S520 may be repeated. Of course, the warning signal may be output in the form of voice, graphics and / or letter combination by a high-level control unit (not shown). To this end, the high-level control unit may include a display, an audio system, etc. Examples of the high-level control unit may include an electronic control unit (ECU), a hybrid control unit (HCU), etc.

[0090] When the check result in step S520 is that the connection is normal, a control pilot (CP) duty ratio may be sensed and it may be checked whether the CP duty ratio corresponds to a reference value (step S540). In step S540, it is determined whether low level communication or high level communication is available.

[0091] The reference value may be about 5%. Generally, when the charging connector 20 and the charging port 210 are normally connected to each other, power line communication (PLC) for transmission and reception may be performed through the CP line between the charging facility 110 and the electric vehicle 120 .

[0092] When the result of the check in step S540 is that the CP duty ratio does not correspond to the reference value, the charging control unit 230 may perform an AC charging operation based on low-level communication (e.g., CP pulse width modulation (PWM)) (step S541), and then proceed to a step of turning on the AC relay 320 (step S542). Figure 6 , or step S612 in the above procedure.

[0093] On the contrary, when the result of the check in step S540 is that the CP duty ratio corresponds to the reference value, the charging control unit 230 may start to perform high-level communication (step S550 ).

[0094] When high-level communication is performed between the charging facility 110 and the electric vehicle 120, communication compliant with German Institute for Standardization (DIN) 70121 or ISO 15118 is available. Therefore, the charging control unit 230 may check whether communication compliant with ISO 15118 is available (step S560).

[0095] When the result of the check in step S560 is that communication compliant with ISO 15118 is available, the charging control unit 230 may check whether DC charging or AC charging is available based on ISO 15118 ( Figure 6 In other words, it is checked whether AC charging compliant with ISO 15118 or DC charging compliant with ISO 15118 is available.

[0096] When the result of the check in step S610 is that DC charging is available, the charging control unit 230 may perform DC charging by turning on the DC relay 330 ( Figure 6 Step S611 and step S620 in the above description).

[0097] In contrast, when the result of the check in step S610 is that AC charging is available instead of DC charging, the charging control unit 230 may perform AC charging by turning on the AC relay 320 (steps S612 and S630 ).

[0098] Subsequently, the charging control unit 230 may check whether the AC charging is completed (step S631 ) or whether the DC charging is completed (step S621 ).

[0099] When the check result in steps S621 and S631 is that DC charging is not completed or AC charging is not completed, the previous steps may be repeated.

[0100] On the contrary, the checking result in steps S621 and S631 may be DC charging completion or AC charging completion, and the charging control unit 230 may end the AC charging or DC charging by turning off the AC relay 320 (step S633) or turning off the DC relay 330 (step S623).

[0101] when Figure 5 When the result of the check in step S560 is that communication compliant with ISO 15118 is not available, proceed directly to step S611.

[0102] Figure 7 1 is a flowchart for performing a communication process between the charging facility 110 and the electric vehicle 120 according to an exemplary embodiment of the present invention. Figure 7 , when high-level communication is performed between the charging facility 110 and the electric vehicle 120 , communication compliant with DIN 70121 or ISO 15118 may be available.

[0103] Supported application protocol messages may be sent and received (step S710 ). Supply location and charging point (SLAC) may facilitate the process of selecting one from various charging facilities 110 to charge the electric vehicle 120 .

[0104] For reference, the communication message sent and received at this time may be an "Ethernet" message. Through the process in SLAC, it is determined which charging facility 110 is selected to charge the electric vehicle 120. Then, messages may be exchanged in a given order according to the protocol defined in ISO 15118 (2) and DIN 70121 (1), and a charging operation may be performed (step S720).

[0105] In other words, when the electric vehicle 120 sends the supportable standard protocols in priority order, the supportable standard protocols can be compared with the standard protocols supported by the charging facility 110 in question. When the same protocol exists, the charging facility 110 can respond in consideration of the priority order of the electric vehicle 120 (steps S730 to S750).

[0106] The methods or algorithm steps described in conjunction with the embodiments disclosed in this specification can be implemented in the form of program commands that can be executed by various computer components (e.g., microprocessors, processors, and central processing units). Therefore, the methods or algorithm steps can be recorded on a computer-readable medium. Program (command) codes, data files, data structures, etc. are recorded on a computer-readable medium individually or in combination.

Claims

1. A device for charging an electric vehicle, the device comprising: Charging port; a detection block configured to generate a detection signal by detecting whether a charging connector of a charging facility is connected to the charging port; a charging controller configured to perform charging control using a first charging mode or a second charging mode according to the detection signal; as well as A relay box is configured to separate charging power supplied from a charging facility into direct current power and alternating current power according to the charging control. 2 . The apparatus for charging an electric vehicle according to claim 1 , further comprising a junction box configured to allow or prohibit the direct current power from flowing into the battery.

3. The device for charging an electric vehicle according to claim 2, wherein: The junction box is arranged between the relay box and the battery, and includes a first wiring switch element connected to a DC+ line and a second wiring switch element connected to a DC- line. 4 . The apparatus for charging an electric vehicle according to claim 1 , further comprising an on-board charger configured to receive AC power and convert the received AC power into DC power.

5. The device for charging an electric vehicle according to claim 1, further comprising: a first contact point sensor configured to detect an open state or a closed state of a first charging door installed at a charging portion of a charging port conforming to a first charging mode; and The second contact point sensor is configured to detect an open state or a closed state of a second charging door installed at a charging portion of the charging port conforming to the second charging mode.

6. The device for charging an electric vehicle according to claim 5, wherein: The charging controller is configured to terminate the charging control in response to detecting that the second charging gate is in an open state when the charging control is performed using the first charging mode, or in response to detecting that the first charging gate is in an open state when the charging control is performed using the second charging mode.

7. A device for charging an electric vehicle, the device comprising: Charging port; a detection block configured to generate a detection signal by detecting whether a charging connector of a charging facility is connected to the charging port; a charging controller configured to perform charging control using a first charging mode or a second charging mode according to the detection signal, wherein the first charging mode includes a NACS mode and the second charging mode includes a CCS mode; and A relay box is configured to separate charging power supplied from a charging facility into direct current power and alternating current power according to the charging control.

8. The device for charging an electric vehicle according to claim 7, wherein: The detection block includes: A first detector disposed at a first charging port compliant with the NACS mode and configured to detect a connection with the charging connector; and A second detector is disposed at a second charging port compliant with the CCS mode and is configured to detect connection with the charging connector.

9. The device for charging an electric vehicle according to claim 8, wherein: The relay box comprises: an AC relay connected to the AC power line and configured to allow or inhibit the flow of AC power; and A DC relay is arranged in parallel with the AC relay and connected to the DC power line, and the DC relay is configured to allow or prohibit the flow of DC power.

10. The device for charging an electric vehicle according to claim 9, wherein: The AC relay and the DC relay are disposed in the AC power line and the DC power line, respectively, and each of the AC relay and the DC relay includes a plurality of switching elements.

11. The device for charging an electric vehicle according to claim 9, wherein: In the case where charging control is performed using the second charging mode, the charging controller is configured to keep the line from the second charging port compliant with the CCS mode connected to the connection point in the relay box by turning off the AC relay and the DC relay.

12. The device for charging an electric vehicle according to claim 9, wherein: The charging controller is configured to keep the AC relay and the DC relay off when charging control is not performed using one of the first charging mode and the second charging mode.

13. The device for charging an electric vehicle according to claim 9, wherein: After the first charging port conforming to the NACS mode or the second charging port conforming to the CCS mode is normally connected to the charging connector, based on the comparison result of the control guidance duty cycle with the preset reference value and based on whether the specific communication scheme is supported, the charging controller is configured to perform AC charging by turning on the AC relay or to perform DC charging by turning on the DC relay.

14. The device for charging an electric vehicle according to claim 13, wherein: Based on the comparison result of the control guide duty ratio with the preset reference value, AC charging is performed based on the low level communication or the high level communication.

15. The device for charging an electric vehicle according to claim 13, wherein: Based on whether a specific communication scheme is supported, one of AC charging or DC charging is performed, or only DC charging is directly performed.

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