Diagnostic system and control method for in-cable control box of electric vehicle

Abstract

The present disclosure relates to a diagnostic system for an in-cable control box (ICCB), which is installed in a vehicle, is electrically connected to a low-speed charging cable having an ICCB on one side, is electrically connected to an on-board diagnostic (OBD) device on the other side, and is configured to diagnose the ICCB. The system includes: a control pilot (CP) data conversion unit configured to receive charging status data generated from the ICCB; a controller area network (CAN) communication unit configured to receive diagnostic startup data of the ICCB generated from the OBD device; and a control unit configured to receive the charging status data from the CP data conversion unit, convert the charging status data into data recognizable by the OBD device, receive diagnostic startup data from the CAN communication unit, and convert the diagnostic startup data into data recognizable by the ICCB.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the priority benefit of Korean Patent Application No. 10-2020-0092560 filed on July 24, 2020, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference in its entirety. Technical Field

[0003] The present disclosure relates to a diagnostic system for an in-cable control box of an electric vehicle and a control method thereof, and more particularly, to a diagnostic system for an in-cable control box (ICCB), which is installed in a vehicle, electrically connected to a low-speed charging cable having an ICCB on one side thereof, electrically connected to an on-board diagnostics (OBD) device on the other side thereof, and is configured to diagnose the ICCB based on instructions from the OBD device. Background Art

[0004] Typically, low-speed charging cables are used to charge the batteries of electric vehicles using commercial AC power.

[0005] The low-speed charging cable includes: a connector that connects to a charging socket of an electric vehicle; an in-cable control box (abbreviated as "ICCB") configured to monitor and control power applied to the vehicle battery from a commercial AC power source; and a plug that connects to a power socket of the commercial AC power source.

[0006] The ICCB generates charging status data called a control pilot (abbreviated as "CP").

[0007] When the ICCB recognizes that the connector is connected to the charging socket of the electric vehicle and the charging preparation is completed, the ICCB controls to switch the relay to an ON state and apply AC power to the vehicle.

[0008] In addition, the ICCB performs a protection function of protecting a user and a vehicle from overvoltage or overcurrent during the process of battery charging, and the ICCB displays a connection status with the vehicle during the charging operation, a maximum charging current value, and a charging progress status on a display device.

[0009] However, in the case where charging is interrupted due to an abnormal condition during a charging operation using a low-speed charging cable in the related art, the ICCB switches a relay to an “OFF” state to cut off power, and displays charging interruption on a display device.

[0010] In this case, since the ICCB indicates the interruption of charging in the form of a simplified icon, there is a problem that the user cannot clearly recognize the cause of the interruption of charging.

[0011] For this reason, when the charging interruption icon is displayed on the display device of the ICCB, people are concerned that it takes a lot of time to identify the fault point, and they may request maintenance thinking that the charging interruption is a fault of the ICCB, and sometimes disassemble the ICCB during maintenance, causing unnecessary maintenance.

[0012] There is also a known technology that the ICCB monitors the charging status and transmits the charging status data to a server through a wireless communication network, and the server transmits the charging status data to a wireless communication device such as a user's mobile phone to allow the user to identify the charging status through the user's wireless communication device.

[0013] However, even in the case of displaying the charging status by using the wireless communication device as described above, the reason for interrupting the charging cannot be clearly displayed, and therefore, there is always a problem that a lot of time is required to identify the fault point of the ICCB and unnecessary maintenance is caused. Further, because the wireless communication module for wireless communication is embedded in the ICCB, there are disadvantages such as an increase in the volume of the low-speed charging cable, an increase in manufacturing cost, and the need for certification for wireless communication.

[0014] In addition, the charging status data is managed by a server, and there are concerns about the cost incurred in establishing and maintaining facilities for operating the server, and due to the characteristics of wireless communication, the communication status deteriorates in the event of rain or snowfall.

[0015] The information included in this Background section is only for enhancement of understanding of the general background of the disclosure and is not to be taken as an admission or any form of suggestion that this information forms the prior art already known to a person skilled in the art. Summary of the invention

[0016] The present disclosure has made an effort to provide a configuration of a diagnostic system for an in-cable control box for an electric vehicle, which can provide information about charging interruption when charging is interrupted due to an abnormal condition during a charging operation, so that a fault point can be easily identified and excellent maintainability can be achieved.

[0017] An exemplary embodiment of the present disclosure provides a diagnostic system for an in-cable control box (ICCB) of an electric vehicle, which is disposed in the vehicle, electrically connected to a low-speed charging cable having an ICCB on one side thereof, electrically connected to an on-board diagnostic (OBD) device on the other side thereof, and configured to diagnose the ICCB based on an instruction of the OBD device. The system includes: a control pilot (CP) data conversion unit configured to receive charging status data generated from the ICCB; a controller area network (CAN) communication unit configured to receive diagnostic startup data of the ICCB generated from the OBD device; and a control unit configured to receive the charging status data from the CP data conversion unit, convert the charging status data into data recognizable by the OBD device, receive diagnostic startup data from the CAN communication unit, and convert the diagnostic startup data into data recognizable by the ICCB.

[0018] Another exemplary embodiment of the present disclosure provides an in-cable control box (ICCB) of a low-speed charging cable of an electric vehicle, comprising: a controller configured to generate charging status data; a control pilot (CP) drive circuit configured to output the charging status data generated from the controller; and a universal asynchronous receiver / transmitter (UART) interface connected between the CP drive circuit and the controller to perform UART communication.

[0019] Another exemplary embodiment of the present disclosure provides a control method for a diagnostic system for an in-cable control box (ICCB), wherein one side of the system is electrically connected to a low-speed charging cable having an ICCB, and the other side is electrically connected to an on-board diagnostic (OBD) device, the method comprising: when a connector of the low-speed charging cable is connected to a charging socket of the system, the ICCB receives a diagnostic start instruction from the OBD device and enters a diagnostic mode for diagnosing the ICCB; when the diagnostic start instruction is received from the OBD device, the ICCB confirms the type of the instruction; and when the diagnostic start instruction includes an instruction requesting a response to a fault code, the ICCB identifies whether the ICCB is currently in a fault state, and sends a fault code corresponding to the identified fault state to the OBD device.

[0020] According to the diagnostic system for the in-cable control box for an electric vehicle and the control method for the system according to the present disclosure configured as described above, the ICCB can send and receive data so that when charging is interrupted, the ICCB can clearly display the cause of the charging interruption on the display device, thereby quickly identifying the fault point of the ICCB and preventing erroneous maintenance.

[0021] Since there is no need to embed a separate module for wireless communication, a separate authentication procedure for wireless communication is not required, and the size of the low-speed charging cable can be kept compact.

[0022] Even in the case where the casing of the ICCB is assembled by bolts or fused by heat or friction, it is not necessary to loosen the bolts from the casing or break the casing, so it is possible to update software, diagnose internal faults, and view charging history without further damaging the casing. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a configuration diagram of a diagnostic system for an in-cable control box according to the present disclosure.

[0024] Figure 2 is a flow chart illustrating a control method of a diagnostic system for an in-cable control box according to the present disclosure.

[0025] Figure 3 is a detailed view of a control box within a cable according to the present disclosure.

[0026] Figure 4 is a flow chart illustrating a control method of an in-cable control box according to the present disclosure. DETAILED DESCRIPTION

[0027] Hereinafter, the configuration and operation of a diagnostic system for an in-cable control box of an electric vehicle and a control method therefor according to the present disclosure will be described in detail with reference to the accompanying drawings.

[0028] However, the disclosed drawings are provided as examples to fully convey the spirit of the present disclosure to those skilled in the art. Therefore, the present disclosure is not limited to the drawings disclosed below, and may be specified as other aspects.

[0029] Unless otherwise defined, the terms used in the specification of the present disclosure have the meanings commonly understood by those skilled in the art to which the present disclosure belongs, and in the following description and drawings, detailed descriptions of well-known functions and configurations will be omitted to avoid unnecessarily confusing the subject matter of the present disclosure.

[0030] Figure 1 is a configuration diagram of a diagnostic system for an in-cable control box according to the present disclosure.

[0031] Reference Figure 1 A diagnostic system 1 for an in-cable control box (ICCB) according to the present disclosure (hereinafter referred to as an “ICCB diagnostic system” for convenience) refers to a system installed in a vehicle, one side of which is electrically connected to a low-speed charging cable 100 having an ICCB 110, the other side of which is electrically connected to an on-board diagnostic (abbreviated as “OBD”) device 200, and configured to diagnose the ICCB 110 of the low-speed charging cable 100.

[0032] The low-speed charging cable 100 includes a connector 120 configured to be electrically connected to a charging socket 10 of a vehicle and a plug 130 configured to be connected to a commercial AC power source.

[0033] As described above, the ICCB 110 generates charging condition data referred to as a control pilot (abbreviated as "CP").

[0034] When the ICCB 110 recognizes that charging preparation is complete in a state where the connector 120 is connected to the charging socket 10 of the electric vehicle, the ICCB 110 controls to switch the embedded relay to an on state and applies commercial AC power to the vehicle.

[0035] The ICCB 110 performs a protection function of protecting a user and a vehicle from overvoltage or overcurrent during a charging operation of a vehicle battery, and the ICCB 110 displays a connection status with the vehicle during the charging operation, a maximum charging current value, and a charging progress status on a display device (not shown) attached to a housing of the ICCB 110.

[0036] The OBD device 200 is a well-known device that communicates with an electronic control unit (ECU) of a vehicle in a state where an OBD connector 210 is connected to an OBD interface 50 of the vehicle. The OBD device 200 checks the vehicle by identifying the electrical and electronic operating states of various types of devices and modules installed in the vehicle based on the communication result. The OBD device 200 generates diagnostic result data obtained by diagnosis, and displays the diagnostic result data on a display device (not shown) attached to a housing of the OBD device 200, thereby enabling a mechanic to identify a fault point or an internal state of the vehicle.

[0037] In this case, the OBD device 200 uses a unified diagnostic service (UDS) protocol, and the UDS protocol is a specific protocol for diagnosing a vehicle, requesting a specific operation of the vehicle, and upgrading software for controlling the vehicle.

[0038] More specifically, the ICCB diagnostic system 1 according to the present disclosure includes a CP data conversion unit 20, which receives charging status data (control pilot (CP)) generated from the ICCB 110 of the low-speed charging cable 100 through the charging socket 10 electrically connected to the connector 120 of the low-speed charging cable 100, and converts the charging status data into data that can be read by the control unit 30.

[0039] The ICCB diagnosis system 1 according to the present disclosure includes a controller area network (CAN) communication unit 40 that receives diagnosis start data of the ICCB generated from the OBD device 200 through an OBD interface unit 50 electrically connected to an OBD connector 210 of the OBD device 200 .

[0040] The ICCB diagnostic system 1 according to the present disclosure includes a control unit 30 that receives charging status data from the CP data conversion unit 20 to convert the charging status data into data recognizable by the OBD device 200, and receives diagnosis start data from the CAN communication unit 40 to convert the diagnosis start data into data recognizable by the ICCB 110.

[0041] The ICCB diagnostic system 1 according to the present disclosure includes a CP level adjustment unit 60 that adjusts a voltage level of a charging condition signal (control pilot (CP)) during a process of updating the ICCB 110 when update instruction data is received from the OBD device 200 .

[0042] The control unit 30 of the ICCB diagnostic system 1 according to the present disclosure configured as described above executes the diagnostic mode for diagnosing the ICCB only when the ICCB is electrically connected to the OBD device 200. When the control unit 30 receives a diagnostic end instruction from the OBD device 200 while executing the diagnostic mode, or when the electrical connection between the ICCB and the OBD device 200 is cut off, the control unit 30 ends the diagnostic mode and switches to the charging mode.

[0043] Figure 2 : is a flowchart showing a control method of the ICCB diagnostic system 1 according to the present disclosure configured as described above.

[0044] Reference Figure 2 The control unit 30 of the ICCB diagnosis system 1 according to the present disclosure determines whether the ICCB 110 is connected to the diagnosis system 1 by confirming whether the charging socket 10 of the diagnosis system 1 is electrically connected to the connector 120 of the low speed charging cable 100 ( S10 ).

[0045] When it is determined that the ICCB 110 is connected to the diagnosis system 1, the control unit 30 enters a diagnosis mode and prepares to receive diagnosis start data from the OBD device 200 of the vehicle (S11).

[0046] When the control unit 30 receives the diagnosis start data from the OBD device 200 of the vehicle through the CAN communication unit 40 ( S12 ), the control unit 30 parses the diagnosis start data ( S13 ) and transmits the parsed diagnosis start data to the ICCB 110 of the low speed charging cable 100 ( S14 ).

[0047] The term "parsing" of data refers to a computer programming term for converting instruction signals so that the instruction signals can be used by other programs or subroutines.

[0048] Next, when the ICCB 110 receiving the diagnosis start data generates charging condition data and the control unit 30 receives the charging condition data (control pilot (CP)) from the ICCB 110 ( S15 ), the charging condition data is parsed ( S16 ).

[0049] In this case, charging condition data (control pilot (CP)) generated from the ICCB 110 is converted into data readable by the control unit 30 by the CP data conversion unit 20 .

[0050] Thereafter, the control unit 30 transmits the parsed charging status data to the OBD device 200 of the vehicle through the CAN communication unit 40 ( S17 ).

[0051] Then, the OBD device 200 receiving the charging status data displays the connection status with the vehicle during the charging operation, the maximum charging current value, the charging progress status, and whether the ICCB is operating normally on a display device (not shown) of the OBD device 200. Therefore, the problem that the cause of the charging interruption cannot be identified when the charging is interrupted due to an abnormal condition during the charging operation can be solved by using the low-speed charging cable in the related art.

[0052] Thereafter, when the connection between the connector 120 of the low speed charging cable 100 and the charging receptacle 10 of the diagnostic system 1 is cut off ( S18 ), the control unit 30 releases the diagnostic mode of the ICCB ( S19 ) and switches from the diagnostic mode to the charging mode.

[0053] Figure 3 is a detailed view of the ICCB 110 of the low-speed charging cable 100 according to the present disclosure.

[0054] The ICCB 110 according to the present disclosure includes a controller 300 , a universal asynchronous receiver / transmitter (UART) interface 310 , and a CP driving circuit 320 .

[0055] The controller 300 includes a CP output module 301 , a data sending module 302 , a data receiving module 303 and a CP voltage monitoring module 304 .

[0056] The CP output module 301 is a component that generates a pulse width modulation (PWM) control signal of a control pilot CP (charging condition data) having a predetermined duty ratio.

[0057] That is, the CP output module 301 outputs the charging status data (CP) generated by the data sending module 302 in a PWM manner by fixing the data sending module 302 to a high state in the charging mode. The CP output module 301 sends the charging status data (CP) output from the data sending module 302 to the CP driving circuit 320 by generating a control signal with a duty cycle of 100% in the diagnosis mode.

[0058] The data sending module 302 is a component for generating charging status data.

[0059] The UART interface 310 performs UART communications with the controller 300 and the CP driving circuit 320 , respectively.

[0060] To this end, the UART interface 310 includes logic gates including a first AND gate 311 and a second AND gate 312 .

[0061] As described above, the first AND gate receives the PWM control signal transmitted from the CP output module 301 of the controller 300 or the signal transmitted from the data transmission module 302 , and outputs any one of the signals to the CP driving circuit 320 .

[0062] The second AND gate 312 is a logic gate that receives an output signal of the CP voltage of the CP voltage feedback module 321 of the CP driving circuit 320 and sends the output signal to the data receiving module 303 of the controller 300 .

[0063] The data receiving module 303 is a part that recognizes data of the ICCB in the diagnosis mode by receiving a signal transmitted from the CP voltage feedback module 321 via the second AND gate 312 and recognizing a high / low level of the corresponding signal.

[0064] The CP voltage monitoring module 304 is a component that identifies the CP voltage in the charging mode by receiving the CP voltage output from the CP voltage feedback module 321 of the CP driving circuit 320 and reading an analog-to-digital (ADC) voltage level of the CP voltage.

[0065] The CP driving circuit 320 generates a charging condition signal CP, and outputs the CP having a predetermined duty ratio according to a PWM control signal of the CP output module 301 of the controller 300 .

[0066] The CP voltage feedback module 321 is a component that feeds back the CP signal output from the CP driving circuit 320 to the second AND gate 312 and the CP voltage monitoring module 304 and changes the voltage level so that the second AND gate 312 and the CP voltage monitoring module 304 can recognize it.

[0067] Figure 4is a flowchart illustrating a control process of an ICCB according to the present disclosure.

[0068] First, the ICCB 110 confirms whether the ICCB diagnosis system 1 of the vehicle is connected to the ICCB 110 (S20).

[0069] The connection between the ICCB diagnosis system 1 and the ICCB 110 is confirmed by confirming whether the connector 120 of the low speed charging cable 100 is connected to the charging receptacle 10 of the diagnosis system 1 .

[0070] Next, when the connector 120 of the low speed charging cable 100 is connected to the charging receptacle 10 of the diagnostic system 1 , the ICCB 110 receives a diagnostic start instruction from the OBD device 200 and enters a diagnostic mode for diagnosing the ICCB 110 ( S21 ).

[0071] Next, the ICCB 110 confirms whether a diagnosis start command is received from the OBD device 200 of the vehicle (S22), and confirms the type of command when receiving the diagnosis start command from the OBD device 200 (S23), thereby operating a corresponding command of each of the following steps.

[0072] First, in the case where the instruction received in step S23 is an instruction requesting a response to a fault code indicating whether the current ICCB 110 is currently in a fault state, the ICCB 110 identifies whether the ICCB 110 is currently in a fault state, and the ICCB 110 transmits a fault code corresponding to the identified fault state to the OBD device 200 of the vehicle (S24). In this case, the corresponding fault code may be transmitted in correspondence with the data required by the OBD device 200.

[0073] Next, in the case where the instruction received in step S23 is an instruction of a separate diagnosis request requesting diagnosis of whether the function of each of the components installed in the ICCB 110 is operating normally, the ICCB 110 diagnoses whether the function of each of the components installed in the ICCB 110 is operating normally (S25), and the ICCB 110 transmits the diagnosis result data obtained by the diagnosis to the OBD device 200 (S26).

[0074] In the case where the command received in step S23 is an update execution command requesting update of a driver for operating the ICCB 110, the ICCB 110 enters an update mode for updating the driver (S27), and the ICCB 110 receives data required for updating the driver from the OBD device 200 (S28).

[0075] The ICCB 110 confirms whether an update end message indicating the end of the update of the driver is received from the OBD device 200 (S29), and when the end message is received, the ICCB 110 ends the update mode of the driver (S30).

[0076] After executing each of steps S24, S26 and S30, the ICCB 110 confirms whether the connection between the connector 120 of the low-speed charging cable 100 and the charging socket 10 of the diagnostic system 1 is cut off (S31), and when the connection between the connector 120 of the low-speed charging cable 100 and the charging socket 10 of the diagnostic system 1 is cut off, the ICCB 110 releases the diagnostic mode (S32) and controls the operation of the charging mode, that is, the basic operation of the ICCB.

[0077] The operation of controlling the charging mode of the ICCB is: when the charging preparation is recognized to be completed in a state where the connector 120 of the low-speed charging cable 100 is connected to the charging socket 10 of the electric vehicle, control is performed to switch the embedded relay to the on state and apply commercial AC power to the vehicle. Specifically, the control may include protecting the user and the vehicle from the voltage or overcurrent during the overcharging operation during the operation of charging the battery of the vehicle, and displaying the connection state with the vehicle during the charging operation, the maximum charging current value, and the charging progress state on a display device (not shown) attached to the housing of the ICCB 110.

[0078] According to the diagnostic system of the in-cable control box for an electric vehicle according to the present disclosure configured as described above and the control method for the system, the ICCB can send and receive data so that when charging is interrupted, the ICCB can clearly display the reason for the charging interruption on the display device, thereby quickly identifying the fault point of the ICCB and preventing incorrect maintenance. In addition, a separate authentication procedure for wireless communication is not required, and the size of the low-speed charging cable can be kept compact. In addition, the software can be updated, internal faults can be diagnosed, and the charging history can be viewed without further damaging the casing.

[0079] The above description is only for illustrating the technical idea of ​​the present disclosure, and a person skilled in the art to which the present disclosure belongs will be able to make various modifications and variations without departing from the basic features of the present disclosure.

[0080] Therefore, the embodiments disclosed in the present disclosure are not intended to limit the technical ideas of the present disclosure, but are used to explain the technical ideas, and the scope of the technical ideas of the present disclosure is not limited by these embodiments. The protection scope of the present disclosure should be interpreted by the attached claims, and all technical ideas within the scope equivalent to them should be interpreted as included in the scope of the present disclosure.

Claims

1. A diagnostic system for an in-cable control box (ICCB), wherein the system is disposed in a vehicle and one side of the system is electrically connected to a low-speed charging cable having an ICCB and the other side of the system is electrically connected to an on-board diagnostic device (OBD device), the system comprising: A control pilot data conversion unit, namely a CP data conversion unit, receives charging status data generated from the ICCB; A controller area network communication unit, i.e., a CAN communication unit, receives the diagnostic start data of the ICCB generated from the OBD device; and Control unit: receiving the charging status data from the CP data conversion unit, converting the charging status data into data recognizable by the OBD device, receiving the diagnosis start data from the CAN communication unit, and converting the diagnostic startup data into data recognizable by the ICCB, wherein, when the connection with the ICCB is recognized, the control unit receives the diagnostic startup data from the OBD device and sends the diagnostic startup data to the ICCB, and the control unit receives the charging status data from the ICCB and sends the charging status data to the OBD device, so that the OBD device diagnoses the ICCB, wherein, when the connection with the ICCB is cut off, the control unit releases the diagnostic mode of the ICCB and switches to the charging mode.

2. The system according to claim 1, further comprising: The CP level adjustment unit adjusts the voltage level of the CP to update the ICCB when receiving an instruction requesting to update a driver from the OBD device.

3. An in-cable control box, i.e., an ICCB, installed in a low-speed charging cable of an electric vehicle, the ICCB comprising: a controller configured to generate charging status data; A control pilot drive circuit, namely a CP drive circuit, outputs charging status data generated from the controller; as well as A universal asynchronous receiver / transmitter interface, i.e., a UART interface, is connected between the CP driving circuit and the controller to perform UART communication. When the connection with the ICCB is cut off, the control unit releases the diagnosis mode of the ICCB and switches to the charging mode.

4. The ICCB according to claim 3, wherein: The controller comprises: A CP output module generates a control signal so that the charging status data has a predetermined duty cycle; A data sending module, generating the charging status data; a data receiving module, receiving diagnostic startup data from the CP driving circuit; and The CP voltage monitoring module reads a voltage level of the CP voltage output by the CP driving circuit to identify the CP voltage.

5. The ICCB according to claim 4, wherein: The UART interface includes a logic gate, and the logic gate includes a first AND gate and a second AND gate. The first AND gate receives at least one of a pulse width modulation control signal (PWM control signal) sent from the CP output module of the controller or a signal sent from the data sending module, and outputs any one of these signals to the CP driving circuit, and The second AND gate receives an output signal of the CP voltage of the CP voltage feedback module of the CP driving circuit, and sends the output signal to the data receiving module and the CP voltage monitoring module.

6. The ICCB according to claim 4, wherein: The CP output module fixes the data sending module in a high state in the charging mode, outputs the charging status data generated by the CP output module in a PWM manner, and sends the charging status data to the CP driving circuit, and The CP output module generates a control signal with a duty cycle of 100% in a diagnosis mode, and transmits the data output from the data transmission module to the CP driving circuit.

7. A control method for a diagnostic system for an in-cable control box (ICCB), wherein one side of the system is electrically connected to a low-speed charging cable having an ICCB and the other side is electrically connected to an on-board diagnostic device (OBD device), the method comprising: When the connector of the low-speed charging cable is connected to the charging socket of the system, the ICCB receives a diagnosis start instruction from the OBD device and enters a diagnosis mode for diagnosing the ICCB; When receiving the diagnosis start command from the OBD device, the ICCB confirms the type of the command; and When the diagnosis start instruction includes an instruction requesting a response to a fault code, the ICCB identifies whether the ICCB is currently in a fault state and sends a fault code corresponding to the identified fault state to the OBD device, The method further comprises: when the connection with the ICCB is cut off, releasing the diagnosis mode of the ICCB and switching to the charging mode.

8. The method according to claim 7, wherein: When the diagnosis start command includes a command requesting individual diagnosis, the ICCB diagnoses whether a function of each component of the ICCB operates normally, and transmits diagnosis result data obtained by the system to the OBD device.

9. The method according to claim 7, wherein: When the diagnostic startup instruction includes an instruction requesting an update operation of the ICCB driver, the ICCB enters an update mode for updating the driver, the ICCB receives data required for updating the driver from the OBD device, the ICCB confirms whether an update end message is received from the OBD device, and when the end message is received, the ICCB ends the update mode of the driver.

10. The method according to claim 7, wherein: The ICCB confirms whether the connection between the connector of the low speed charging cable and the charging inlet of the system is cut off, and when the connection between the connector of the low speed charging cable and the charging inlet of the system is cut off, the ICCB releases the diagnosis mode and controls the operation of the charging mode.

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