Charging control device for electric vehicle and charging control method thereof

Abstract

A charging control device for an electric vehicle according to one embodiment of the present invention includes: a sub-control unit which is configured to be connected to a first charging port and a second charging port; and a main control unit which is configured to be connected to the first charging port and the second charging port. The sub-control unit is woken up periodically, and when the sub-control unit wakes up, the charging control device is woken up in response to signals transmitted through the first charging port or in response to signals transmitted through the second charging port. When the charging control device wakes up in response to the signals transmitted through the first charging port, the main control unit performs a first charging procedure based on the signals transmitted through the first charging port, and when the charging control device wakes up in response to the signals transmitted through the second charging port, the main control unit performs a second charging procedure based on the signals transmitted through the second charging port. The signals transmitted through the first charging port includes a first proximity detection signal and a first control pilot signal, and the signals transmitted through the second charging port includes a second proximity detection signal and a second control pilot signal.

Description

Charging control device for electric vehicle and charging control method thereof

[0001] The present invention relates to electric vehicles, and more particularly to charging of electric vehicles.

[0002] Electric vehicles (EVs) use electric vehicle supply equipment (EVSE) installed at charging stations to charge their batteries.

[0003] To charge an EV, the EVSE and EV communicate via a charging connector. Once the charging connector is connected, charging begins after signaling is performed between the EVSE and EV.

[0004] Various standards are actively being developed for EV charging. These standards can be broadly categorized into charging systems, charging interfaces, and communication protocols.

[0005] Different standards are being adopted by different countries and automakers. For example, the United States and South Korea have adopted the SAE J1772 AC Type 1 standard for slow charging and the CCS1 (combined charging system 1) standard for fast charging. In contrast, Europe has adopted the Mennekes Type 2 standard for slow charging and the CCS2 (combined charging system 2) standard for fast charging. Japan has adopted the SAE J1772 AC Type 1 standard for slow charging and the CHAdeMO standard for fast charging. China has adopted the GB / T standard. Meanwhile, the United States is moving toward adopting the North American Charging Standard (NACS).

[0006] Accordingly, there are attempts to equip a single EV with two or more charging ports supporting different standards.

[0007] The technical problem to be solved by the present invention is to provide a charging control method for an electric vehicle and a charging control device thereof.

[0008] The technical problem to be solved by the present invention is to provide a method for recognizing a charging port in an electric vehicle equipped with two or more charging ports.

[0009] A charging control device for an electric vehicle according to one embodiment of the present invention includes a sub-control unit configured to be connected to a first charging port and a second charging port, and a main control unit configured to be connected to the first charging port and the second charging port, wherein the sub-control unit periodically wakes up, and wakes up the charging control device according to a signal transmitted through the first charging port when the sub-control unit wakes up, or wakes up the charging control device according to a signal transmitted through the second charging port, and when the charging control device wakes up according to the signal transmitted through the first charging port, the main control unit performs a first charging procedure based on the signal transmitted through the first charging port, and when the charging control device wakes up according to the signal transmitted through the second charging port, the main control unit performs a second charging procedure based on the signal transmitted through the second charging port, and the signal transmitted through the first charging port includes a first proximity detection signal and a first control pilot signal, and the signal transmitted through the second charging port includes a second proximity detection signal and a second control pilot signal.

[0010] It further includes a first switch disposed between the proximity detection port of the first charging port and the sub-control unit, and a second switch disposed between the proximity detection port of the second charging port and the sub-control unit, wherein the first switch and the second switch can be turned on whenever the sub-control unit wakes up.

[0011] The device further includes a first detection unit disposed between the control pilot port of the first charging port and the sub-control unit, a second detection unit disposed between the control pilot port of the second charging port and the sub-control unit, and a third switch disposed between the first detection unit, the second detection unit, and a power source, wherein the third switch is turned on whenever the sub-control unit wakes up, and when the third switch is turned on, the first detection unit may be set to detect the voltage and duty of the first control pilot signal, or the second detection unit may be set to detect the voltage and duty of the second control pilot signal.

[0012] The first detection unit and the second detection unit each include an operational amplifier (OP amp) and a comparator, and when the third switch is turned on, power can be supplied to the OP amp and the comparator.

[0013] It may further include a fourth switch disposed between the proximity detection port of the first charging port and the main control unit, a fifth switch disposed between the proximity detection port of the second charging port and the main control unit, a third detection unit disposed between the control pilot port of the first charging port and the main control unit, a fourth detection unit disposed between the control pilot port of the second charging port and the main control unit, a sixth switch connected to the control pilot port of the first charging port, and a seventh switch connected to the control pilot port of the second charging port.

[0014] When the charging control device is woken up by a signal transmitted through the first charging port, the first switch, the second switch, and the third switch may be turned off, the fourth switch and the sixth switch may be turned on, and the fifth switch and the seventh switch may be turned off.

[0015] When the charging control device is woken up by a signal transmitted through the second charging port, the first switch, the second switch, and the third switch may be turned off, the fifth switch and the seventh switch may be turned on, and the fourth switch and the sixth switch may be turned off.

[0016] The first charging port may be configured to be connected to a first charger supporting a first standard, and the second charging port may be configured to be connected to a second charger supporting a second standard different from the first standard.

[0017] The first standard may be the North American Charging Standard (NACS), and the second standard may be the SAE J1772 AC Type 1 standard or the combined charging system 1 (CCS1) standard.

[0018] When the charging control device wakes up, the sub-control unit can transmit a wake-up reason to the main control unit using UART (universal asynchronous receiver / transmitter) communication.

[0019] The first charging port and the second charging port may be positioned at different locations.

[0020] A charging control method of a charging control device for an electric vehicle according to one embodiment of the present invention includes the steps of: a sub-control unit waking up periodically; a step of receiving a signal through a first charging port or a second charging port when the sub-control unit wakes up; a step of the sub-control unit waking up the charging control device based on a signal received through the first charging port or the second charging port; and a step of the main control unit performing a first charging procedure based on a signal received through the first charging port or performing a second charging procedure based on a signal received through the second charging port, wherein the signal received through the first charging port includes a first proximity detection signal and a first control pilot signal, and the signal received through the second charging port includes a second proximity detection signal and a second control pilot signal.

[0021] The first charging port may be configured to be connected to a first charger supporting a first standard, and the second charging port may be configured to be connected to a second charger supporting a second standard different from the first standard.

[0022] The first standard may be the North American Charging Standard (NACS), and the second standard may be the SAE J1772 AC Type 1 standard or the combined charging system 1 (CCS1) standard.

[0023] According to an embodiment of the present invention, a charging control device can be provided that efficiently recognizes a charging port to which a charger is connected in an electric vehicle equipped with two or more charging ports. According to an embodiment of the present invention, a charging control device can be provided that efficiently recognizes a charging port to which a charger is connected in an electric vehicle equipped with charging ports supporting different standards, and can reduce power consumption.

[0024] FIGS. 1 to 3 are drawings showing a charging system for an electric vehicle according to one embodiment of the present invention.

[0025] FIG. 4 is an example of an electric vehicle equipped with multiple charging ports according to one embodiment of the present invention.

[0026] Figure 5 is a shape of a charging port that supports NACS.

[0027] Figure 6 is a shape of a charging port that supports the SAE J1772 AC Type 1 standard.

[0028] Figure 7 is a shape of a charging port that supports the CCS1 (combined charging system 1) standard.

[0029] Figure 8 is a circuit diagram of the interface between an EVSE and an EV that supports NACS.

[0030] Figure 9 is a circuit diagram of an interface between an EVSE and an EV that supports the SAE J1772 AC Type 1 standard.

[0031] Figure 10 is a circuit diagram of an interface between an EVSE and an EV that supports the CCS1 standard.

[0032] Figure 11 is a CP signal in PWM form output by the EVSE and input to the charging port of the EV.

[0033] Figure 12 is a schematic block diagram of a charging control device according to an embodiment of the present invention.

[0034] FIG. 13 is a drawing illustrating a wake-up cycle of some components in a charging control device according to an embodiment of the present invention.

[0035] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the attached drawings.

[0036] However, the technical idea of ​​the present invention is not limited to some of the embodiments described, but can be implemented in various different forms, and within the scope of the technical idea of ​​the present invention, one or more of the components between the embodiments can be selectively combined or substituted for use.

[0037] In addition, terms (including technical and scientific terms) used in the embodiments of the present invention may be interpreted as having a meaning that can be generally understood by a person of ordinary skill in the technical field to which the present invention belongs, unless explicitly and specifically defined and described, and terms that are commonly used, such as terms defined in a dictionary, may be interpreted in consideration of the contextual meaning of the relevant technology.

[0038] Additionally, the terms used in the embodiments of the present invention are intended to describe the embodiments and are not intended to limit the present invention.

[0039] In this specification, the singular may also include the plural unless specifically stated otherwise in the phrase, and when it is described as “A and / or at least one (or more) of B, C”, it may include one or more of all combinations that can be combined with A, B, C.

[0040] Additionally, in describing components of embodiments of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used.

[0041] These terms are intended only to distinguish one component from another, and are not intended to limit the nature, order, or sequence of the component.

[0042] And, when a component is described as being 'connected', 'coupled' or 'connected' to another component, it may include not only cases where the component is directly connected, coupled or connected to the other component, but also cases where the component is 'connected', 'coupled' or 'connected' by another component between the component and the other component.

[0043] Additionally, when described as being formed or arranged "above or below" each component, "above" or "below" includes not only cases where the two components are in direct contact with each other, but also cases where one or more other components are formed or arranged between the two components. Furthermore, when expressed as "above" or "below", it can include the meaning of a downward direction as well as an upward direction based on one component.

[0044] Hereinafter, embodiments will be described in detail with reference to the attached drawings. Regardless of the drawing numbers, identical or corresponding components are given the same reference numbers, and redundant descriptions thereof will be omitted.

[0045] FIGS. 1 to 3 are drawings showing a charging system for an electric vehicle according to one embodiment of the present invention.

[0046] Referring to FIGS. 1 to 3, an electric vehicle (EV) 10 can be charged from an electric vehicle supply equipment (EVSE) 20. In this specification, an EV (10) refers to a vehicle propelled by an electric motor that draws current from a rechargeable storage battery or other portable energy storage device. Although this specification focuses on an EV (10), it is apparent that embodiments of the present invention can also be applied to a plug-in hybrid electric road vehicle (PHEV).

[0047] For this purpose, a charging cable (22) connected to the EVSE (20) can be connected to the charging port of the EV (10). Here, the EVSE (20) is a facility that supplies AC or DC, and can be placed at a charging station, placed in a home, or implemented to be portable. The EVSE (20) can be used interchangeably with a charging station (supply), an AC charging station (AC supply), a DC charging station (DC supply), a socket-outlet, etc. In this specification, a charger connected to the charging port of the EV (10) can mean the EVSE (20) or the charging cable (22) connected to the EVSE (20).

[0048] A charging control device (Electric Vehicle Communication Controller, EVCC, 100) is mounted in an EV (10) and connected to the EV (10). Here, the charging control device (100) can communicate with each of the EV (10) and the EVSE (20). The charging control device (100) is a device that communicates with the EVSE (20) and the ECU (electronic control unit) in the EV (10) to control charging of the EV (10), and can be used interchangeably with a charging device, a charging communication device, a communication device, a communication control device, etc.

[0049] In this specification, an EV (10) equipped with a charging control device (100) may be collectively referred to as an EV (10). Hereinafter, EV (10) may also mean a charging control device (100) equipped in the EV (10). That is, communication between the EVSE (20) and the EV (10) may mean communication between the EVSE (20) and the charging control device (100) equipped in the EV (10).

[0050] According to an embodiment of the present invention, the charging control device (100) includes a control unit (110), a connection unit (120), and a detection unit (130).

[0051] The control unit (110) generates a control signal for charging between the EV (10) and the EVSE (20). The control signal for charging generated by the control unit (110) can be transmitted to the EVSE (20) through the connection unit (120) or to the ECU (12) in the EV (10).

[0052] The connection unit (120) is connected to the EVSE (20) and transmits signals between the control unit (110) and the EVSE (20). For example, the connection unit (120) may transmit a charging-related signal received from the EVSE (20) to the control unit (110) and transmit a control signal for charging generated by the control unit (110) to the EVSE (20). In addition, the connection unit (120) transmits power received from the EVSE (20) to the battery (14) in the EV (10) according to the control signal for charging generated by the control unit (110).

[0053] The detection unit (130) detects the connection between the EV (10) and the EVSE (20). The detection unit (130) is connected to the connection unit (120) and the control unit (110), respectively, and can transmit information detected from the connection unit (120) to the control unit (110). For example, the control unit (110) can diagnose a diagnostic trouble code (DTC) based on the information detected by the detection unit (130).

[0054] When the charging cable (22) of the EVSE (20), i.e., the charger, is connected to the charging port of the EV (10), a signal for charging is exchanged between the EVSE (20) and the charging control device (100) through the charging port of the EV (10).

[0055] According to an embodiment of the present invention, an EV (10) is equipped with a plurality of charging ports, and a single charging control device (100) is connected to the plurality of charging ports. In this specification, for the convenience of explanation, an example in which an EV (10) is equipped with two charging ports, that is, a first charging port and a second charging port, is described, but the embodiment of the present invention is not limited thereto, and an EV (10) may be equipped with two or more charging ports. In this specification, a charging port is a component to which a charging cable of an EVSE (20), that is, a charger, is connected, and may also be referred to as an injection port, an inlet, a connector, a vehicle connector, etc.

[0056] FIG. 4 is an example of an electric vehicle equipped with multiple charging ports according to one embodiment of the present invention.

[0057] Referring to FIG. 4, the first charging port (410) and the second charging port (420) may be positioned on one side of the EV (10). Here, the one side of the EV (10) may refer to the side where the driver's door is positioned. Although not shown, the first charging port (410) and the second charging port (420) may also be positioned on the other side of the EV (10). Here, the other side of the EV (10) may refer to the opposite side of the side where the driver's door is positioned, i.e., the side where the passenger's door is positioned.

[0058] When the first charging port (410) and the second charging port (420) are arranged on the same side of the EV (10), the first charging port (410) and the second charging port (420) may be arranged to be spaced apart from each other. For example, the first charging port (410) may be arranged in the front part of the EV (10), and the second charging port (420) may be arranged in the back part of the EV (10). Although not shown, the first charging port (410) may be arranged on one side of the electric vehicle, and the second charging port (420) may be arranged on the other side of the electric vehicle. Accordingly, since among the multiple charging ports of the EV (10), a charging port close to the charger of the EVSE (20) can be connected, the degree of freedom in the parking direction and parking position of the EV (10) within the charging station may be increased.

[0059] According to an embodiment of the present invention, the shape of the first charging port (410) and the shape of the second charging port (420) may be different from each other. For example, the charging protocol supported by the first charging port (410) and the charging protocol supported by the second charging port (420) may be different from each other. For example, the first charging port (410) may be configured to be connected to a first charger supporting a first standard, and the second charging port (420) may be configured to be connected to a second charger supporting a second standard different from the first standard. Accordingly, since the EV (10) supports multiple charging standards, user convenience during charging may be improved.

[0060] For example, the first standard may be one selected from the North American Charging Standard (NACS), the SAE J1772 AC Type 1 standard, the combined charging system 1 (CCS1) standard, the Mennekes Type 2 standard, the combined charging system 2 (CCS2) standard, the CHAdeMO standard, and the GB / T standard, and the second standard may be another one selected from the North American Charging Standard (NACS), the SAE J1772 AC Type 1 standard, the combined charging system 1 (CCS1) standard, the Mennekes Type 2 standard, the combined charging system 2 (CCS2) standard, the CHAdeMO standard, and the GB / T standard. For example, the first standard may be the North American Charging Standard (NACS), and the second standard may be the SAE J1772 AC Type 1 standard or the combined charging system 1 (CCS1) standard. However, this is exemplary, and the first standard and the second standard may be selected from various charging standards for EVs (10).

[0061] Fig. 5 is a shape of a charging port supporting NACS, Fig. 6 is a shape of a charging port supporting the SAE J1772 AC Type 1 standard, and Fig. 7 is a shape of a charging port supporting the CCS1 (combined charging system 1) standard. Fig. 8 is a circuit diagram of an interface between an EVSE and an EV supporting NACS, Fig. 9 is a circuit diagram of an interface between an EVSE and an EV supporting the SAE J1772 AC Type 1 standard, and Fig. 10 is a circuit diagram of an interface between an EVSE and an EV supporting the CCS1 standard. Fig. 11 is a CP signal in PWM form output by the EVSE and input to the charging port of the EV.

[0062] Referring to FIG. 5, a charging port supporting NACS includes a DC+ L1 pin, a DC- L2 pin, a CP (control pilot) pin, a PP (proximity pilot) pin, and a G (ground) pin. The DC+ L1 pin and the DC- L2 pin are terminals that receive power from the EVSE (20). According to NACS, slow charging and fast charging can be performed through the common terminals of the DC+ L1 pin and the DC- L2 pin. The CP pin is a terminal that receives a control pilot signal from the EVSE (20). In this specification, the CP pin may be used interchangeably with a CP port, a control pilot pin, a control pilot port, etc. In this specification, the control pilot signal may be used interchangeably with a CP signal. The control pilot signal output from the EVSE (20) is a 1 kHz PWM (pulse width modulation) signal, and the charging control device (100) obtains charging status and current amount information according to the voltage and duty of the control pilot signal. In addition, the control pilot signal output from the EVSE (20) can also be used for communication between the EVSE (20) and the charging control device (100). That is, PLC communication can be performed between the EVSE (20) and the charging control device (100) by superimposing a PLC (power line communication) signal of several MHz on the 1 kHz control pilot signal. The PP pin is a terminal that receives a proximity detection signal, and the connection and capacity of the charger or charging cable of the EVSE (20) can be distinguished using the proximity detection signal. In this specification, the PP pin can be used interchangeably with a PP port, a PD (proximity detection) pin, a PD port, a proximity detection pin, a proximity detection port, etc. The G pin connects the ground of the EVSE (20) and the ground of the EV (10). In this specification, the G pin can be used interchangeably with a G port, a ground pin, a ground port, a ground pin, a ground port, a PE pin, a PE port, etc.

[0063] Referring to Fig. 6, a charging port supporting the SAE J1772 AC Type 1 standard includes an L1 pin, an N pin, a CP (control pilot) pin, a PD pin, and a PE pin. Referring to Fig. 7, a charging port supporting the CCS1 standard further includes a DC+ pin and a DC- pin in addition to the L1 pin, the N pin, the CP (control pilot) pin, the PD pin, and the PE pin. The SAE J1772 AC Type 1 standard supports slow charging, and the CCS1 standard supports slow charging and rapid charging. The L1 pin and the N pin are terminals that receive power from the EVSE (20) during slow charging, and the DC+ pin and the DC- pin are terminals that receive power from the EVSE (20) during rapid charging. The CP pin is a terminal that receives a control pilot signal from the EVSE (20), the PD pin is a terminal that receives a proximity detection signal, and the PE pin is a ground terminal. The description of each of the CP pin, PP pin, and G pin of the charging port supporting NACS of Fig. 5 can be equally applied to the CP pin, PD pin, and PE pin of the charging port of Figs. 6 and 7.

[0064] Meanwhile, referring to Fig. 8, which is a circuit diagram of the interface between the EVSE (20) and the EV (10) supporting NACS, the switch K3 and the switch K4 on the EV (10) side play a role in switching between slow charging and rapid charging. During rapid charging, the switch K3 and the switch K4 are closed to be directly connected to the battery on the EV (10) side, and during slow charging, the switch K3 and the switch K4 are opened to convert power through the OBC (on board charger), which is an AC-DC converter. The control pilot (CP) signal is transmitted from the EVSE (20) to the EV (10) side in the form of a 1 kHz PWM signal, and the charging state is distinguished according to the voltage of the control pilot signal, and current amount information can be obtained according to the duty of the control pilot signal. In addition, if a PLC signal of several MHz is superimposed on the 1 kHz PWM signal, PLC communication can be achieved between the EVSE (20) and the EV (10).

[0065] When a charger supporting NACS is connected to a charging port supporting NACS, the PP pin detects the connection of the charger and initiates communication through the CP pin. Fast charging is initiated by closing switches K1 and K2 on the EVSE (20) side and closing switches K3 and K4 on the EV (10) side, or slow charging is initiated by closing switches K1 and K2 on the EVSE (20) side and opening switches K3 and K4 on the EV (10) side.

[0066] Referring to Fig. 9, which is a circuit diagram of an interface between an EVSE and an EV supporting the SAE J1772 AC Type 1 standard, and Fig. 10, which is a circuit diagram of an interface between an EVSE and an EV supporting the CCS1 standard, the EVSE (20) includes an oscillator and a first resistor (R1). The size of the first resistor (R1) may be smaller than the sizes of the second resistor (R2) and the third resistor (R3) included in the circuit on the EV (10) side. For example, the size of the first resistor (R1) may be 1 kΩ. The oscillator may generate an AC voltage using a voltage input from a power source. The circuit on the EV (10) side includes a second resistor (R2), a third resistor (R3) and a switching element (S2) that are connected in series, and the second resistor (R2) may be connected in parallel with the third resistor (R3) and the switching element (S2). The EV(10) side circuit may further include a capacitor (Cv) connected in parallel with the second resistor (R2), and a diode (D) connected between the second resistor (R2) and the capacitor (Cv). Here, the second resistor (R2) may be larger than the third resistor (R3). For example, the second resistor (R2) may be 2.74 kΩ, and the third resistor (R3) may be 1.3 kΩ or 270 Ω. The EVSE(20) communicates by setting the duty cycle of a PWM signal or a continuous DC voltage signal. The EVSE(20) may change the duty cycle of the PWM signal. The EV(10) responds by applying a resistive load to the positive half-wave of the CP circuit. If the EV(10) draws a current higher than the CP function (duty cycle), the EVSE(20) may open its switching device. At this time, the EVSE (20) will follow the conditions for the allowed response time of the EV (10), the current tolerance with respect to the duty cycle generated by the EVSE (20) and the tolerance of the current measurement in the EVSE (20) itself.The amount of voltage charged to the battery can be controlled by turning on and off a switch connected to a resistor on the EV (10) side. Referring to Fig. 10, communication is performed using a control pilot signal during slow charging, and communication is performed using a control pilot signal and a PLC modem during rapid charging.

[0067] Referring to Fig. 11, the EVSE (20) outputs a CP signal in the form of a PWM having a maximum voltage of +12 V and a minimum voltage of -12 V. The charging control device (100) of the EV (10) detects the duty cycle and voltage size of the CP signal to monitor and control the status.

[0068] The states according to the CP signal can be divided into state A, state B, state C, state D, state E, and state F. State A means a state in which the charger is not connected between the EVSE (20) and the EV (10), that is, an unplugged state, and when the peak of the CP signal is +12 V ± 1 V, it is determined to be state A. State B means a state in which the charger is connected between the EVSE (20) and the EV (10), that is, a plugged state, and may mean a state in which charging is ready. When the maximum voltage of the CP signal is +9 V ± 1 V and the minimum voltage is -12 V ± 1 V, it is determined to be state B. State C and state D mean a state in which charging is in progress, that is, a charging state, and in particular, state D may mean a state in which ventilation is required during charging. When the maximum voltage of the CP signal is +6V±1V and the minimum voltage is -12V±1V, it is determined to be in the C state, and when the maximum voltage of the CP signal is +3V±1V and the minimum voltage is -12V±1V, it is determined to be in the D state. The E state and the F state may indicate error states. For example, the E state may indicate a state in which power is not supplied to the EVSE (20), and the F state may indicate a state in which the EVSE (20) is unavailable. When the maximum voltage of the CP signal is +0V±1V and the minimum voltage is -12V±1V, it is determined to be in the E state, and when the maximum voltage of the CP signal is -12V±1V and the minimum voltage is -12V±1V, it is determined to be in the F state.

[0069] Meanwhile, sleep mode is a mode for energy saving, and the EV (10) and EVSE (20) can enter sleep mode after negotiating a pause through the HLC protocol. On the EVSE (20) side, sleep mode means that the oscillator is turned off, the +12 V supply of the pilot line is maintained, and the power of the lower layer communication module is turned off. On the EV (10) side, sleep mode means the B state, and the power of the lower layer communication module can be turned off. The wake-up mechanism may also be used after the charging session has already ended so that the counterpart station can reset the HLC.

[0070] Interaction between the EVSE (20) and the EV (10) can be monitored and controlled through the CP signal, and as described above, the voltage level of the CP signal can vary depending on the charging state. Accordingly, the charging device (100) of the EV (10) must accurately detect the voltage level of the CP signal.

[0071] As described above, according to an embodiment of the present invention, the charging control device (100) is connected to the first charging port (410) and the second charging port (420), and the first standard supported by the first charger configured to be connected to the first charging port (410) and the second standard supported by the second charger configured to be connected to the second charging port (420) may be different from each other. For example, the first standard may be the North American Charging Standard (NACS), and the second standard may be the SAE J1772 AC Type 1 standard or the combined charging system 1 (CCS1) standard.

[0072] FIG. 12 is a schematic block diagram of a charging control device according to an embodiment of the present invention, and FIG. 13 is a diagram explaining a wake-up cycle of some components within a charging control device according to an embodiment of the present invention. FIG. 13(a) is a wake-up cycle of a sub-control unit within a charging control device according to an embodiment of the present invention, FIG. 13(b) is an on-off cycle of a switch connected to a sub-control unit within a charging control device according to an embodiment of the present invention, and FIG. 13(c) is a wake-up cycle of a charging control device according to an embodiment of the present invention.

[0073] Referring to FIG. 12, a charging control device (1200) according to an embodiment of the present invention includes a sub-control unit (1210) configured to be connected to a first charging port (410) and a second charging port (420), and a main control unit (1220) configured to be connected to the first charging port (410) and the second charging port (420). For convenience of explanation, with respect to the charging control device (1200), duplicate explanations for the same contents as those of the charging control device (100) described with reference to FIG. 3 will be omitted. Here, the sub-control unit (1210) and the main control unit (1220) may be part of the control unit (110) described with reference to FIG. 3.

[0074] In this specification, the sub-control unit (1210) may be used interchangeably with a sub-microcontroller (MCU), an auxiliary control unit, an auxiliary controller, etc., and the main control unit (1220) may be used interchangeably with a main microcontroller (MCU), a main controller, etc. Here, the MCU refers to a computer that performs a predetermined function by forming a microprocessor and an input / output module into a single chip. The MCU according to the embodiment of the present invention is applied in a charging control device (1200) for charging an EV (10), and may be divided into a sub-MCU and a main MCU.

[0075] According to an embodiment of the present invention, the charging control device (100) operates in sleep mode or wake-up mode. Referring to Fig. 13(c), the charging control device (1200) may wake up when an event occurs while operating in sleep mode. To this end, referring to Figs. 13(a) and 13(c), the sub-control unit (1210) is periodically woken up in the sleep mode of the charging control device (1200). For example, when the charging control device (1200) is in sleep mode, the sub-control unit (1210) may operate in sleep mode for T1 and in wake-up mode for T2. Here, T1 may be 128 ms and T2 may be 5 ms, but the period of operation in sleep mode and the period of operation in wake-up mode are exemplary and are not limited thereto. In this way, when the sub-control unit (1210) is periodically woken up, the power consumption of the sub-control unit (1210) can be minimized.

[0076] When a charger is connected to the first charging port (410) or the second charging port (420), a signal from the charger can be input to the charging control device (1200) through the first charging port (410) or the second charging port (420). When the sub-control unit (1210) wakes up and receives a signal through the first charging port (410) or the second charging port (420), the sub-control unit (1210) wakes up the charging control device (1200) based on the signal transmitted through the first charging port (410) or the second charging port (420). That is, as illustrated in FIG. 13(c), the charging control device (1200) in sleep mode can be woken up by the sub-control unit (1210). For example, when a first charger is connected to the first charging port (410) while the charging control device (1200) is operating in sleep mode, a signal is transmitted from the first charger to the sub-control unit (1210) through the first charging port (410), and the sub-control unit (1210) that is temporarily woken up can detect that the first charger is connected to the first charging port (410). Accordingly, the sub-control unit (1210) can wake up the charging control device (1200) based on the signal transmitted through the first charging port (410). As another example, when a second charger is connected to the second charging port (420) while the charging control device (1200) is operating in sleep mode, a signal is transmitted from the second charger to the sub-control unit (1210) through the second charging port (420), and the sub-control unit (1210) that has been temporarily woken up can detect that the second charger is connected to the second charging port (420). Accordingly, the sub-control unit (1210) can wake up the charging control device (1200) based on the signal transmitted through the second charging port (420). In this way, when the charging control device (1200) is woken up by the sub-control unit (1210), the power consumption of the charging control device (1200) can be minimized.

[0077] To this end, the PP port of the first charging port (410) may be connected to the ADC1 port of the sub-control unit (1210), and the PP port of the second charging port (420) may be connected to the ADC2 port of the sub-control unit (1210). When the first proximity detection signal is received through the ADC1 port of the sub-control unit (1210) at the time of waking up the sub-control unit (1210), the sub-control unit (1210) may detect that the first charger is connected to the first charging port (410) and wake up the charging control device (1200). When the second proximity detection signal is received through the ADC2 port of the sub-control unit (1210) at the time of waking up the sub-control unit (1210), the sub-control unit (1210) may detect that the second charger is connected to the second charging port (420) and wake up the charging control device (1200). When the charging control device (1200) wakes up, the main control unit (1220) can perform a charging procedure. In this specification, since the main control unit (1220) performs an operation when the charging control device (1200) wakes up, the wakeup of the charging control device (1200) can include the wakeup of the main control unit (1220).

[0078] According to an embodiment of the present invention, a first switch (1200S1) may be arranged between the PP port of the first charging port (410) and the ADC1 port of the sub-control unit (1210), and a second switch (1200S2) may be arranged between the PP port of the second charging port (420) and the ADC2 port of the sub-control unit (1210). As illustrated in Fig. 13(b), the first switch (1200S1) and the second switch (1200S2) may be turned on whenever the sub-control unit (1210) wakes up. That is, the first switch (S1) and the second switch (S2) may be turned on periodically. At this time, the on / off of the first switch (S1) and the second switch (S2) may be controlled by the sub-control unit (1210). In this specification, the On of a switch may be used interchangeably with the switch being closed, the switch being connected, the switch being turned on, etc., and the Off of a switch may be used interchangeably with the switch being opened, the switch being disconnected, the switch being turned off, etc. For example, the first switch (S1) and the second switch (S2) may repeat an open state for T1 and a closed state for T2, and the closing operation cycle of the first switch (S1) and the second switch (S2) may be synchronized with the wake-up cycle of the sub-control unit (1210).

[0079] In addition, according to an embodiment of the present invention, a first detection unit (1230) is disposed between the CP port of the first charging port (410) and the sub-control unit (1210), and a second detection unit (1240) is disposed between the CP port of the second charging port (420) and the sub-control unit (1210). When a first charger is connected to the first charging port (410), the first detection unit (1230) can detect the voltage and duty of the first control pilot signal transmitted through the first charging port (410). When a second charger is connected to the second charging port (420), the second detection unit (1240) can detect the voltage and duty of the second control pilot signal transmitted through the second charging port (420). Here, the first detection unit (1230) and the second detection unit (1240) include an operational amplifier (OP amp, 1231, 1241) and a comparator (comparator, 1232, 1242), respectively, and the operational amplifiers (1231, 1241) may be connected to the PWM1 port and the PWM2 port of the sub-control unit (1210), respectively, and the comparators (1232, 1242) may be connected to the duty1 port and the duty2 port of the sub-control unit (1210), respectively. Accordingly, the sub-control unit (1210) may detect the voltage and duty of the first control pilot signal from the signal input to the PWM1 port and the signal input to the duty1 port. Similarly, the subcontrol unit (1210) can detect the voltage and duty of the second control pilot signal from the signal input to the PWM2 port and the signal input to the duty2 port.

[0080] Here, a third switch (1200S3) is further arranged between the first detection unit (1230), the second detection unit (1240), and the power supply (+5V), and as illustrated in Fig. 13(b), the third switch (1200S3) can be turned on whenever the sub-control unit (1210) wakes up. That is, the third switch (1200S3) can be closed periodically. At this time, the on / off of the third switch (S3) can be controlled by the sub-control unit (1210). For example, the third switch (1200S3) can repeat an open state during T1 and a closed state during T2, and the closing operation cycle of the third switch (1200S3) can be synchronized with the wake-up cycle of the sub-control unit (1210) and the closing operation cycles of the first switch (1200S1) and the second switch (1200S2). Here, the power (+5V) supplies +5V power to the operational amplifiers (1231, 1241) and comparators (1232, 1242) of the first detection unit (1230) and the second detection unit (1240), and when the third switch (1200S3) is turned on, the first detection unit (410) can detect the voltage and duty of the first control pilot signal, or the second detection unit (420) can detect the voltage and duty of the second control pilot signal.

[0081] According to an embodiment of the present invention, when the sub-control unit (1210) receives the first proximity detection signal and detects the voltage and duty of the first control pilot signal, the sub-control unit (1210) can wake up the charging control device (1200) and transmit a wakeup reason to the main control unit (1220) using UART (universal asynchronous receiver / transmitter) communication. Here, the wakeup reason can include a charging state determined based on the voltage and duty of the first control pilot signal. Similarly, when the sub-control unit (1210) receives the second proximity detection signal and detects the voltage and duty of the second control pilot signal, the sub-control unit (1210) can transmit a wakeup signal to the main control unit (1220) and transmit a wakeup reason to the main control unit (1220) using UART (universal asynchronous receiver / transmitter) communication.

[0082] When the charging control device (1200) is woken up by the sub-control unit (1210), the main control unit (1220) performs a charging procedure using the first proximity detection signal and the first control pilot signal transmitted through the first charging port (410), or performs a charging procedure using the second proximity detection signal and the second control pilot signal transmitted through the second charging port (420).

[0083] For example, if the first charging port (410) is a charging port that supports NACS and a first charger supporting NACS is connected to the first charging port (410), the main control unit (1220) can perform a charging procedure using a protocol according to NACS by using a first proximity detection signal and a first control pilot signal. Alternatively, if the second charging port (420) is a charging port that supports the SAE J1772 AC Type 1 standard or the CCS1 (combined charging system 1) standard and a second charger supporting the SAE J1772 AC Type 1 standard or the CCS1 (combined charging system 1) standard is connected to the second charging port (420), the main control unit (1220) can perform a charging procedure using a protocol according to the SAE J1772 AC Type 1 standard or the CCS1 (combined charging system 1) standard by using a second proximity detection signal and a second control pilot signal.

[0084] In order for the main control unit (1220) to proceed with the charging procedure, the main control unit (1220) is connected to the first charging port (410) and the second charging port (420), respectively.

[0085] To this end, the PP port of the first charging port (410) may be connected to the ADC3 port of the main control unit (1220), and the PP port of the second charging port (420) may be connected to the ADC4 port of the main control unit (1220). According to an embodiment of the present invention, a fourth switch (1200S4) may be arranged between the PP port of the first charging port (410) and the ADC3 port of the main control unit (1220), and a fifth switch (1200S5) may be arranged between the PP port of the second charging port (420) and the ADC4 port of the main control unit (1220). That is, the PP port of the first charging port (410) is branched and connected to the ADC1 port of the sub-control unit (1210) and the ADC 3 port of the main control unit (1220), and the sub-control unit (1210) or the main control unit (1220) can receive a signal from the PP port of the first charging port (410) by the first switch (1200S1) between the PP port of the first charging port (410) and the ADC1 port of the sub-control unit (1210) and the fourth switch (1200S4) between the PP port of the first charging port (410) and the ADC 3 port of the main control unit (1220). Likewise, the PP port of the second charging port (420) is branched and connected to the ADC2 port of the sub-control unit (1210) and the ADC 4 port of the main control unit (1220), and the sub-control unit (1210) or the main control unit (1220) can receive a signal from the PP port of the second charging port (420) by the second switch (1200S2) between the PP port of the second charging port (420) and the ADC2 port of the sub-control unit (1210) and the fifth switch (1200S5) between the PP port of the second charging port (420) and the ADC 4 port of the main control unit (1220).

[0086] That is, in sleep mode, the fourth switch (1200S4) and the fifth switch (1200S5) are open, and the first switch (1200S1), the second switch (1200S2), and the third switch (1200S3) are periodically closed along with the wake-up of the sub-control unit (1210). When the charging control device (1200) wakes up, the first switch (1200S1), the second switch (1200S2), and the third switch (1200S3) are opened, and the fourth switch (1200S4) or the fifth switch (1200S5) is closed. For example, when the charging control device (1200) is woken up by the first proximity detection signal and the first control pilot signal transmitted through the first charging port (410), the first switch (1200S1), the second switch (122S2), and the third switch (1200S3) may be turned off, the fourth switch (1200S4) may be turned on, and the fifth switch (1200S5) may be turned off. Accordingly, the first proximity detection signal may be input to the main control unit (1220) through the PP port of the first charging port (410). Alternatively, when the charging control device (1200) is woken up by the second proximity detection signal and the second control pilot signal transmitted through the second charging port (420), the first switch (1200S1), the second switch (1200S2), and the third switch (1200S3) may be turned off, the fifth switch (1200S5) may be turned on, and the fourth switch (1200S4) may be turned off. Accordingly, the second proximity detection signal may be input to the main control unit (1220) through the PP port of the second charging port (420).

[0087] In addition, according to an embodiment of the present invention, a third detection unit (1250) is disposed between the CP port of the first charging port (410) and the main control unit (1220), and a fourth detection unit (1260) is disposed between the CP port of the second charging port (420) and the main control unit (1220). The third detection unit (1250) can detect the voltage and duty of the first control pilot signal transmitted through the CP port of the first charging port (410), and the fourth detection unit (1260) can detect the voltage and duty of the second control pilot signal transmitted through the CP port of the second charging port (420). Here, the third detection unit (1250) and the fourth detection unit (1260) include an operational amplifier (OP amp, 1251, 1261) and a comparator (comparator, 1252, 1262), respectively, and the operational amplifiers (1251, 1261) may be connected to the PWM3 port and the PWM4 port of the main control unit (1220), respectively, and the comparators (1252, 1262) may be connected to the duty3 port and the duty4 port of the main control unit (1220), respectively. Accordingly, the main control unit (1220) may detect the voltage and duty of the first control pilot signal from the signal input to the PWM3 port and the signal input to the duty3 port. Similarly, the main control unit (1220) can detect the voltage and duty of the second control pilot signal from the signal input to the PWM4 port and the signal input to the duty4 port.

[0088] Meanwhile, the main control unit (1220) further includes a CP port, and a PLC line can be connected to the CP port. One PLC line is connected to the CP port of the first charging port (410) and the CP port of the second charging port (420), and the main control unit (1220) can perform PLC communication with the first charger connected to the first charging port (410) or the second charging port connected to the second charging port (420) depending on the on / off of the sixth switch (1200S6) and the seventh switch (1200S7).

[0089] For this purpose, the sixth switch (1200S6) may be connected to the CP port of the first charging port (410), and the seventh switch (1200S7) may be connected to the CP port of the second charging port (420). When the charging control device (1200) is in sleep mode, the sixth switch (1200S6) and the seventh switch (1200S7) are in an open state, and the first switch (1200S1), the second switch (1200S2), and the third switch (1200S3) are periodically closed together with the wake-up of the sub-control unit (1210). When the charging control device (1200) wakes up, the first switch (1200S1), the second switch (1200S2), and the third switch (1200S3) become open, and the sixth switch (1200S6) or the seventh switch (1200S7) becomes closed. For example, when the charging control device (1200) is woken up by the first proximity detection signal and the first control pilot signal transmitted through the first charging port (410), the first switch (1200S1), the second switch (1200S2), and the third switch (1200S3) may be turned off, the fourth switch (1200S4) and the sixth switch (1200S6) may be turned on, and the fifth switch (1200S5) and the seventh switch (1200S7) may be turned off. Accordingly, the first proximity detection signal may be input to the main control unit (1220) through the PP port of the first charging port (410), the voltage and duty detected from the first control pilot signal may be input to the PWM3 port and the duty3 port of the main control unit (1220), and PLC communication using the first control pilot signal may be performed through the CP port of the main control unit (1220).Alternatively, when the charging control device (1200) is woken up by the second proximity detection signal and the second control pilot signal transmitted through the second charging port (420), the first switch (1200S1), the second switch (1200S2), and the third switch (1200S3) may be turned off, the fifth switch (1200S5) and the seventh switch (1200S7) may be turned on, and the fourth switch (1200S4) and the sixth switch (1200S6) may be turned off. Accordingly, the second proximity detection signal may be input to the main control unit (1220) through the PP port of the second charging port (420), the voltage and duty detected from the second control pilot signal may be input to the PWM4 port and the duty4 port of the main control unit (1220), and PLC communication using the second control pilot signal may be performed through the CP port of the main control unit (1220).

[0090] In an embodiment of the present invention, at least one of the first to seventh switches (1200S1 to 1200S7) may be an active switch and may be implemented as a transistor, FET, SPDT, relay, or the like.

[0091] According to an embodiment of the present invention, when the charging control device (1200) is in sleep mode, the sub-control unit (1210) independently operates in sleep mode and wake-up mode. When the charging control device (1200) is in sleep mode, the sub-control unit (1210) periodically operates in sleep mode and wake-up mode, and can control the wake-up of the charging control device (1200). Accordingly, the power consumption of the charging control device (100) can be minimized.

[0092] In addition, the fourth to seventh switches (1200S4 to 1200S7) connected between the first charging port (410) and the second charging port (420) and the main control unit (1220) are in an open state when the charging control device (1200) operates in sleep mode. Accordingly, even if the first charger or the second charger is connected to the first charging port (410) or the second charging port (420) when the charging control device (1200) operates in sleep mode, the problem of the signal transmitted through the first charging port (410) or the signal transmitted through the second charging port (420) being directly transmitted to the main control unit (1220) can be prevented.

[0093] In addition, the first to third switches (1200S1 to 1200S3) connected between the first charging port (410) and the second charging port (420) and the sub-control unit (1210) are in an open state when the charging control device (1200) operates in wake-up mode. Accordingly, when the charging control device (1200) wakes up and the main control unit (1220) performs a charging procedure, the problem of a signal transmitted through the first charging port (410) or the signal transmitted through the second charging port (420) being directly transmitted to the sub-control unit (1210) can be prevented.

[0094] In addition, when the first charger is connected to the first charging port (410), the fourth switch (1200S4) and the sixth switch (1200S6) may be closed, and the fifth switch (1200S5) and the seventh switch (1200S7) may be open. Alternatively, when the second charger is connected to the second charging port (420), the fourth switch (1200S4) and the sixth switch (1200S6) may be open, and the fifth switch (1200S5) and the seventh switch (1200S7) may be closed. Accordingly, the main control unit (1220) can efficiently perform a charging procedure according to the charging port to which the charger is connected.

[0095] Although the present invention has been described above with reference to preferred embodiments thereof, it will be understood by those skilled in the art that various modifications and changes may be made to the present invention without departing from the spirit and scope of the present invention as set forth in the claims below.

Claims

1. In a charging control device for an electric vehicle, A sub-control unit configured to be connected to the first charging port and the second charging port, and It includes a main control unit set to be connected to the first charging port and the second charging port, The above sub-control unit wakes up periodically, and wakes up the charging control device according to a signal transmitted through the first charging port when the sub-control unit wakes up, or wakes up the charging control device according to a signal transmitted through the second charging port. When the charging control device wakes up in response to a signal transmitted through the first charging port, the main control unit performs a first charging procedure based on the signal transmitted through the first charging port, and when the charging control device wakes up in response to a signal transmitted through the second charging port, the main control unit performs a second charging procedure based on the signal transmitted through the second charging port. A charging control device wherein a signal transmitted through the first charging port includes a first proximity detection signal and a first control pilot signal, and a signal transmitted through the second charging port includes a second proximity detection signal and a second control pilot signal.

2. In paragraph 1, A first switch disposed between the proximity detection port of the first charging port and the sub-control unit, and Further comprising a second switch disposed between the proximity detection port of the second charging port and the sub-control unit, A charging control device in which the first switch and the second switch are turned on whenever the sub-control unit wakes up.

3. In paragraph 2, A first detection unit arranged between the control pilot port of the first charging port and the sub-control unit; A second detection unit arranged between the control pilot port of the second charging port and the sub-control unit; Further comprising a third switch disposed between the first detection unit, the second detection unit, and the power source; The above third switch is turned on whenever the sub-control unit wakes up. A charging control device wherein when the third switch is turned on, the first detection unit is set to detect the voltage and duty of the first control pilot signal, or the second detection unit is set to detect the voltage and duty of the second control pilot signal.

4. In paragraph 3, A charging control device in which the first detection unit and the second detection unit each include an operational amplifier (OP amp) and a comparator, and the power is supplied to the OP amp and the comparator when the third switch is turned on.

5. In paragraph 3, A fourth switch arranged between the proximity detection port of the first charging port and the main control unit; A fifth switch arranged between the proximity detection port of the second charging port and the main control unit; A third detection unit arranged between the control pilot port of the first charging port and the main control unit; A fourth detection unit arranged between the control pilot port of the second charging port and the main control unit; A sixth switch connected to the control pilot port of the first charging port, and A charging control device further comprising a seventh switch connected to a control pilot port of the second charging port.

6. In paragraph 5, A charging control device in which, when the charging control device is woken up by a signal transmitted through the first charging port, the first switch, the second switch, and the third switch are turned off, the fourth switch and the sixth switch are turned on, and the fifth switch and the seventh switch are turned off.

7. In paragraph 5, A charging control device in which, when the charging control device is woken up by a signal transmitted through the second charging port, the first switch, the second switch, and the third switch are turned off, the fifth switch and the seventh switch are turned on, and the fourth switch and the sixth switch are turned off.

8. In paragraph 1, A charging control device in which a first charger supporting a first standard is set to be connected to the first charging port, and a second charger supporting a second standard different from the first standard is set to be connected to the second charging port.

9. In paragraph 8, A charging control device wherein the first standard is NACS (North American Charging Standard) and the second standard is SAE J1772 AC Type 1 standard or CCS1 (combined charging system 1) standard.

10. In paragraph 1, A charging control device in which, when the charging control device wakes up, the sub-control unit transmits a wake-up reason to the main control unit using UART (universal asynchronous receiver / transmitter) communication.

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