KR102492458B1 - Electric vehicle charger cable capable of AC / DC metering - Google Patents

Abstract

A cable connected to the power output unit of the electric vehicle charger 1 according to the present invention and conducting current to charge the electric vehicle includes a voltage sensor 100 for measuring AC/DC voltage; Current sensor 200 for measuring AC/DC current; Determination detection unit 300 for determining whether the power of the connected electric car charger 1 is AC/DC; It is characterized in that it includes a mode changing unit 400 that changes to AC charging or DC charging mode according to the result of determining whether AC/DC is determined by the determination detection unit 300.

Description

Electric vehicle charger cable capable of AC / DC metering}

The present invention relates to an electric vehicle charger cable that directly measures AC/DC current using a current sensor inside the cable.

Unlike conventional internal combustion engine vehicles, where the engine is replaced by an electric motor, electric vehicles can easily receive the driving energy source of the vehicle through electrical outlets installed in homes or parking lots, as well as facilities for charging electric vehicles such as electric vehicle charging stations or charging stations. .

A facility for charging an electric vehicle (electric vehicle charger system) is provided with a charging stand, and a user connects a fixed charging cable to the charging stand or charges the electric vehicle through a charging lubricator connected to the charging stand. This is a charging cable usually provided when purchasing a vehicle and consists of various socket shapes depending on the manufacturer of the electric vehicle.

In addition, a user charges an electric vehicle by connecting a mobile charger to an electric outlet installed in a home or a parking lot and the electric outlet.

On the other hand, in Korean Patent Publication No. 10-2019-0023769, as shown in FIGS. 1 to 2, 'a first charging cable for connecting an electric vehicle and a power output unit provided in a charging station to conduct current; and a second charging cable having one end connected to the first charging cable and the other plug connected to a commercial power outlet to charge the electric vehicle.

However, as described above, conventional electric vehicle chargers install a watt-hour meter or measurement module inside the charger and measure the amount of charged wattage. In this method, since the loss due to cable efficiency cannot be corrected after the watt-hour meter, the difference in the amount of charged wattage between the charging station operator and the customer There is a high possibility of disputes over fees, and since no security algorithm is applied, customer and transaction information may be exposed to external hacking risks. There is a disadvantage that each connection cable must be provided.

KR 10-2019-0023769 A KR 10-2018-0096259 A KR 10-2019-0060647 A WO 2012/148597 A1

Therefore, the present invention is to solve the above-mentioned problems, by receiving the operating voltage from the electric vehicle charger main body and measuring the AC/DC current directly from the electric vehicle charger connection jack to solve the charge dispute according to the cable efficiency and the measured AC /Based on DC voltage and current data, it is possible to measure and bill the charging user's accurate active and reactive power, maximum demand power measurement, time-based measurement and power factor, etc., as well as meter reading using various wired and wireless communication methods. AC/DC that can transmit and billing data to an electric vehicle charger body or mobile phone application, provide real-time 1-second LP data and metering by time zone, and can modify and add functions by using F/W update at customer's request It is to provide an electric vehicle charger cable that can be metered.

A cable connected to the power output of the electric vehicle charger 1 according to the present invention to charge the electric vehicle by conducting current to achieve the above object includes a voltage sensor 100 for measuring AC/DC voltage; Current sensor 200 for measuring AC/DC current; Determination detection unit 300 for determining whether the power of the connected electric car charger 1 is AC/DC; It is characterized in that it includes a mode changing unit 400 that changes to AC charging or DC charging mode according to the result of determining whether AC/DC is determined by the determination detection unit 300.

The present invention not only connects to and operates the conventional electric vehicle charger system as it is, but also enables AC/DC metering immediately without any change, protects meter reading data and customer transaction information from hacking by applying a security algorithm, and enables two-way communication. It can also be used as a movable cable that is currently in use according to the treatment of the cable end connector.

1 is a conceptual diagram of a conventional electric vehicle charger system.
2 is a movable cable of a conventional electric vehicle charger.
3 is a conceptual diagram of an electric vehicle charger cable capable of AC/DC metering according to the present invention.
4 is a block diagram of an electric vehicle charger cable capable of AC/DC metering according to the present invention.
5 is a block diagram of an electric vehicle charger cable capable of AC/DC metering according to the present invention.
6 is a diagram for explaining a wired and wireless communication method of an electric vehicle charger cable capable of AC/DC metering according to the present invention.
7 is an internal circuit diagram of an electric car charger cable determination detection unit capable of AC/DC metering according to the present invention.
8 is an operation block diagram of an electric vehicle charger cable determination detection unit capable of AC/DC metering according to the present invention.
9 is a detailed operation flowchart of an electric car charger cable determination detection unit capable of AC/DC metering according to the present invention.
10 is a flowchart illustrating an implementation process of an LP data inspection method in which an electric vehicle charger cable capable of AC/DC metering prevents data redundancy and omission according to the present invention.
11 is a flowchart illustrating an implementation process of an LP data inspection method in which an electric vehicle charger cable capable of AC/DC metering according to the present invention prevents redundant inspection and omission of data according to another embodiment.
12 is a block diagram showing an embodiment to which an error correction unit of an electric vehicle charger cable capable of AC/DC metering according to the present invention is applied.

Before addressing the details of the embodiments described below, some terms are defined or clarified.

LP data means load profile data, which means a graph that shows changes over time and electrical load, and has different forms depending on customer type, temperature, and vacation season.

Hereinafter, an electric vehicle charger cable capable of measuring AC/DC according to the present invention will be described in detail with reference to FIGS. 3 to 12.

A cable connected to the power output unit of the electric vehicle charger 1 according to the present invention and conducting current to charge the electric vehicle includes a voltage sensor 100 for measuring AC/DC voltage; Current sensor 200 for measuring AC/DC current; Determination detection unit 300 for determining whether the power of the connected electric car charger 1 is AC/DC; It is characterized in that it includes a mode changing unit 400 that changes to AC charging or DC charging mode according to the result of determining whether AC/DC is determined by the determination detection unit 300.

In addition, through the voltage and current data of the electric vehicle charger 1 measured by the voltage sensor 100 and the current sensor 200, the amount of active and reactive power used, maximum demand power measurement and power factor, meter reading and billing data are calculated It is characterized in that it further comprises a data processing unit 500 to do.

In addition, it is characterized in that it further comprises a data storage unit 600 for storing the data calculated by the data processing unit 500.

In addition, it is characterized in that it further comprises a communication unit 700 for transmitting the data calculated by the data processing unit 500 to a meter reading server or a user's smartphone. As shown in FIG. 6 , the communication unit 700 may transmit calculated data to a meter reading server or a user's smart phone using various communication methods such as RS-485, PLC, Wi-SUN, NB-IOT, and LORA.

In addition, the communication unit 700 is characterized in that it has a firmware update function for updating. According to the user's needs, functions can be modified or added using firmware updates, and various types of voltage and current sensors can be used without the need for separate calibration by applying a new error correction algorithm.

In addition, it is characterized by further comprising a security unit 900 to which a security algorithm for protecting customer and transaction information from external hacking risk is applied.

In addition, the current sensor 200 can precisely measure a high current value by using a shunt current sensor using a shunt resistor.

In addition, it can be used as a movable cable that is currently in use according to the treatment of the cable end connector.

Next, the determination detection unit 300 according to the present invention will be described in detail with reference to FIGS. 7 to 9 .

The 1a condenser (C1A) 21 and the 1b condenser (C1B) 22 of the DC blocking unit 20 connected to one end of the rectifying unit connected to the output of the electromagnetic interference (EMI) filter, and the DC blocking unit 20 ) and the first resistor (R1) (31) and the second resistor (R2) (32) of the AC high voltage divider (30) connected to the AC/DC conversion unit (40) connected to the AC high voltage divider (30) A first integrated circuit (U1A) (51) of a first diode (D1) (41) and a second capacitor (C2) (42) and a chattering removal unit (50) connected to the AC/DC conversion unit (40). ) and the second integrated circuit (U1B) 52 and the third resistor (R3) of the initial operation limiting unit 60 connected to the second integrated circuit (U1B) 52 of the chattering removal unit 50 ( 61) and the third capacitor (C3) (62), the transistor (Q2) (70) of the DC switching relay driving unit (70) connected to the initial operation limiting unit (60), and the DC switching relay driving unit (70) The first integration of the connected DC switching relay driving coil 80, the relay contact point 81 turned on/off by driving the relay driving coil 80, and the chattering removal unit 50 The power factor correction circuit (PFC) control unit 10 connected to the circuit U1A 51 to control the power factor correction circuit PFC and the output operation on/off connected to the DC/DC transformer 90 to control the output operation It is characterized in that it is composed of an ON / OFF switch 91.

In the operation of the present invention, when AC power is used, AC power is conducted through the 1a capacitor (C1A) 21 and the 1b capacitor (C1B) 22, and the high voltage is applied to the first resistor (R1) 31, the second The resistor (R2) (32) is divided into a low voltage that does not damage the integrated circuit (IC). The divided voltage is rectified through the first diode (D1) (41) and the second capacitor (C2) (42) and converted into a DC voltage. When a voltage is applied to the second integrated circuit (U1B) 52 of the chattering suppression integrated circuit, the output of the second integrated circuit (U1B) 52 of the chattering suppression integrated circuit becomes 'L' and the transistor Q2 (70) ) is turned OFF. Therefore, the relay drive coil 80 does not operate.

In addition, the output of the first integrated circuit (U1A) 51 of the chattering cancellation integrated circuit also becomes 'L', so that the power factor correction circuit (PFC) (AC/DC) controller 10 operates normally.

In the case of DC power, the first resistor (R1) (31) and the second resistor (R2) ( 32), there is no voltage across it. Therefore, the inputs of the first integrated circuit (U1A) 51 and the second integrated circuit (U1B) 52 of the chattering cancellation integrated circuit become 'L' and the output voltage becomes 'H'. If the output of the second integrated circuit (U1B) 52 of the chattering cancellation integrated circuit is 'H', the transistor Q2 (70) conducts and the relay driving coil 80 operates, so that the relay contact point 81 is turned on ( ON) state. In addition, the output of the first integrated circuit (U1A) 51 of the chattering cancellation integrated circuit also becomes 'H', so the power factor correction circuit (PFC) (AC/DC) controller 10 does not operate.

The operation of the third resistor (R3) (61) and the third condenser (C3) (62) of the initial operation limiting unit (60) is initially chattering because the voltage of the second condenser (C2) (42) is 'L'. The output of the second integrated circuit (U1B) 52 of the ring removal integrated circuit becomes H' and the transistor (Q2) 70 is turned on so that the relay drive coil 80 may malfunction. On the other hand, the third resistor (R3) (61) and the third capacitor (C3) (62) integrate the output of the second integrated circuit (U1B) (52) of the chattering cancellation integrated circuit to form an instantaneous relay driving coil (80). ) to limit the operation. When the relay drive coil 80 operates, the relay contact point 81 is turned on, and the power factor correction circuit (PFC) driving element inductor 11, MOSFET 12, and second diode D2 (13) is removed and the input DC power is supplied to the DC/DC transformer 90 at the rear without passing through the power factor correction circuit.

Also, when the switch (SW) 91 is turned on, the output of the DC/DC transformer 90 at the rear end is turned off. When the switch 91 is turned on, the DC power supplied to the server power supply for both AC and DC is removed to prevent damage to the input connector or switch.

Referring to FIG. 9, the operation process of the power factor correction circuit (AC/DC) controller 10 and the relays 80 and 81 when D/C power and A/C power are input according to an embodiment of the present invention is detailed. I found out.

According to the present invention, if the relays 80 and 81 do not operate when DC power supply is supplied, the copper loss of the inductor 11, the switching loss of the MOSFET 12, and the second diode D2 13 Forward voltage drop loss occurs, and various losses are eliminated by operating the relays 80 and 81 when DC power is supplied through the AC power and DC power decision circuit of the decision detection unit 300 according to the present invention, thereby eliminating various losses charging efficiency).

In addition, the data processing unit 500 is characterized in that it measures LP data and metering for each time period.

Referring to FIGS. 10 and 11, a method for preventing data redundant inspection and omission of LP data will be described in more detail. The LP measured by the inspection server through the data processor 500 and stored in correspondence with the first unique address Load Profile) data collection step, the meter reading server determining whether the first unique address corresponds to the second unique address, and the meter reading server storing the collected LP data, including the second unique address The address is characterized in that it corresponds to LP data previously stored in the most recent meter reading server. According to the present invention, by storing the LP data measured through the data processing unit 500 in different unique addresses and comparing the unique address where the measured LP data is stored with the unique address where the finally collected LP data is stored, It is possible to prevent redundant inspection of one LP data.

Referring to FIG. 10, looking at the implementation process of the LP data inspection method for preventing redundant inspection and omission of data according to an embodiment of the present invention, first, the inspection server is measured through the data processing unit 500 to correspond to the first unique address to collect the stored LP (Load Profile) data (S10). In this case, the first unique address means a unique address where the LP data most recently measured through the data processing unit 500 is stored.

In this embodiment, when LP data is measured through the data processing unit 500, the newly measured LP data is stored in the next unique address of the unique address where the previously measured LP data is stored, and the next unique address is greater than the previous unique address. It means a unique address increased by the reference value.

That is, in this embodiment, whenever new LP data is measured, the LP data is stored in an address where the unique address is increased by the reference value, and the reference value indicating the period of measuring the LP data and the amount of the unique address increase can be freely set. .

Except for exceptional cases, since the meter reading server collects LP data measured at the same cycle as the cycle of measuring LP data in the data processing unit 500, when LP data is measured through the data processing unit 500, the measured period Collect LP data first.

Next, the meter reading server determines whether the first unique address corresponds to the next unique address after the second unique address (S20). At this time, the second unique address means the unique address of the data processing unit 500 corresponding to the LP data most recently pre-stored in the inspection server.

This determination is made to check whether there is LP data that the meter reading server failed to collect and store among the LP data measured through the data processing unit 500 due to an exceptional situation such as a communication failure.

In this embodiment, since the measured LP data is stored in a unique address next to the unique address where the previously measured LP data is stored, the fact that the first unique address is the next unique address of the second unique address means that the measurement period of the stored LP data is This means that there is a difference of one cycle.

Therefore, if the second unique address, which is the unique address of the data processing unit 500 corresponding to the most recently pre-stored LP data in the meter reading server, corresponds to the previous unique address of the first unique address, the most recently measured by the data processing unit 500 LP data measured before the measured LP data means that all of them are collected and stored by the meter reading server.

On the other hand, if the first unique address does not correspond to the next unique address of the second unique address, the meter reading server stores LP data corresponding to each unique address from the next unique address of the second unique address to the previous unique address of the first unique address is collected from the data processing unit 500 (S22).

That the first intrinsic address does not correspond to the next intrinsic address of the second intrinsic address means that the meter reading server was unable to collect and store part of the LP data measured through the data processing unit 500 due to a communication failure or the like.

Therefore, since the collection of LP data stored up to the second unique address is normally completed, LP data is collected from the next unique address (second unique address + reference value) of the second unique address, and the LP data stored in response to the first unique address is Since it is collected in the above step S10, stored LP data corresponding to each unique address up to the previous unique address (first unique address-reference value) of the first unique address is collected.

Next, the inspection server stores the collected LP data (S30).

In particular, in this embodiment, since the LP data collected by the meter reading server differs depending on whether the first pertinent address is the next pertinent address to the second pertinent address, when the first pertinent address is the next pertinent address after the second pertinent address, Stores the LP data stored in correspondence with the 1st unique address, and if the 1st unique address does not correspond to the next unique address of the 2nd unique address, each from the next unique address of the 2nd unique address to the previous unique address of the 1st unique address The stored LP data corresponding to the unique address is additionally collected and stored.

According to this embodiment, by storing the LP data measured through the data processing unit 500 at different unique addresses and comparing the unique address where the measured LP data is stored with the unique address where the finally collected LP data is stored, It is possible to prevent redundant meter reading of the collected LP data.

In addition, this embodiment can prevent LP data from being omitted by collecting LP data stored in the missing unique address through comparison of unique addresses.

Referring to FIGS. 10 and 11, looking at the implementation process of the LP data inspection method for preventing redundant inspection and omission of data according to another embodiment of the present invention, first, the inspection server measures the LP ( Load Profile) Receives the first unique address where data is stored (S110). In this case, the first unique address means a unique address where the LP data most recently measured through the data processing unit 500 is stored.

In this embodiment, when LP data is measured through the data processing unit 500, the newly measured LP data is stored at a unique address next to the unique address where the previously measured LP data is stored, and the next unique address is greater than the previous unique address. It means a unique address increased by the reference value.

That is, in this embodiment, whenever new LP data is measured, the LP data is stored in an address where the unique address is increased by the reference value, and the reference value indicating the period of measuring the LP data and the amount of the unique address increase can be freely set. .

Then, the meter reading server determines whether the first intrinsic address corresponds to the next intrinsic address of the second intrinsic address (S120). At this time, the second unique address means the unique address of the data processing unit 500 corresponding to the LP data most recently pre-stored in the inspection server.

This determination is made to check whether all previously measured LP data has been collected and stored before collecting the most recently measured LP data.

In this embodiment, since the newly measured LP data is stored in a unique address next to the unique address where the previously measured LP data is stored, the fact that the first unique address is the next unique address of the second unique address is the measurement period of the stored LP data means that there is a difference of one cycle.

Therefore, if the second unique address, which is the unique address of the data processing unit 500 corresponding to the most recently pre-stored LP data in the meter reading server, is the previous unique address of the first unique address, the most recently measured through the data processing unit 500 In addition to LP data, previously measured LP data means all collected and stored by the meter reading server.

Accordingly, if the first intrinsic address corresponds to the next intrinsic address to the second intrinsic address, the inspection server collects stored LP data corresponding to the first intrinsic address from the data processing unit 500 (S130).

That is, when the first inherent address corresponds to the next inherent address of the second inherent address, only the most recently measured LP data can be collected through the data processing unit 500, so that only necessary LP data can be collected without duplication.

On the other hand, if the first intrinsic address does not correspond to the next intrinsic address of the second intrinsic address, the meter reading server collects stored LP data corresponding to each intrinsic address from the intrinsic address following the second intrinsic address to the first intrinsic address ( S122).

If the first unique address does not correspond to the next unique address of the second unique address, another unique address exists after the second unique address. means not collected from

Therefore, the inspection server has a unique address next to the unique address where the most recently collected LP data is stored (the second unique address + reference value) to the first unique address where the most recently measured LP data is stored through the data processing unit 500. Collect stored LP data corresponding to each unique address.

Next, the inspection server stores the collected LP data (S140).

In particular, in this embodiment, since the LP data collected by the meter reading server differs depending on whether the first pertinent address is the next pertinent address to the second pertinent address, when the first pertinent address is the next pertinent address after the second pertinent address, LP data stored in correspondence with 1st unique address is stored, and if the 1st unique address does not correspond to the next unique address of the 2nd unique address, it corresponds to each unique address from the next unique address of the 2nd unique address to the 1st unique address and collects and stores the stored LP data.

According to this embodiment, by storing the LP data measured through the data processing unit 500 at different unique addresses and comparing the unique address where the measured LP data is stored with the unique address where the finally collected LP data is stored, It is possible to prevent redundant meter reading of the collected LP data.

In addition, this embodiment can prevent LP data from being omitted by collecting LP data stored in the missing unique address through comparison of unique addresses.

In addition, the data processing unit 500 may further include an error correction unit 800 having an error correction algorithm function for the calculated data.

Next, the error correction unit 800 for automatically correcting transmission errors that may occur in voltage and current values measured by the IoT meter will be described in detail.

The error correction unit 800 according to the present invention includes a first measurement unit that measures current and voltage values flowing on the power distribution system 1 and defines a reference value; A second measuring unit for measuring a conversion value that is output by converting current and voltage values measured by power facilities installed on the power distribution system 1 to a predetermined reference ratio in a transducer; a processing unit that calculates an error value of the conversion value when the ratio between the reference value and the conversion value is not within a predetermined error range of the reference ratio; and a correction unit correcting the conversion value by adjusting the variable resistor based on the error value. Here, the first measurement unit and the second measurement unit may be configured by separately including the voltage sensor 100 and the current sensor 200, respectively.

An embodiment of the present invention will be described in more detail with reference to FIG. 12 . An embodiment of the present invention is an error that may occur in the current and voltage values measured by the IoT meter, an error that may occur when the current and voltage values are converted in the data processing unit 500, and a user smartphone in the data processing unit 500 It focuses on the correction of errors that may occur when transferring current and voltage values to

12 is a block diagram of an embodiment to which the error correction unit 800 of the present invention is applied. As mentioned above, the error correction unit 800 according to an embodiment of the present invention includes a first measurement unit 810, a second measurement unit 820, a correction unit 830, and a processing unit 840.

First, the first measuring unit 810 measures actual current and voltage values flowing in the distribution line. The actual current and voltage values measured by the first measuring unit 810 are defined as “reference values”. In addition, the measuring equipment used in the first measuring unit 810 may be equipment previously used to measure current and voltage in a power facility, or may be existing equipment having high measurement accuracy and precision or equipment to be developed in the future. there is. In addition, the first measuring unit 810 serves to transfer the reference value to the processing unit 840 . Such delivery may be made through at least one of wired and wireless.

After that, the second measurement unit 820 functions to measure the analog output value transmitted from the data processing unit 500 to the smart phone, that is, the conversion value of the current and voltage values measured from the power facility. For brevity of the specification below, these analog output values are referred to as "conversion values". As mentioned above, these conversion values are used to check whether there is an error in the current and voltage values measured in the power facility. Then, the conversion value is passed to the processing unit 840 for processing below.

The processing unit 840 compares the ratio of the reference value received from the first measurement unit 810 and the conversion value received from the second measurement unit 820 with a preset reference ratio, and if the ratio is different, the reference value is calculated. Based on this, the error value of the conversion value is calculated.

Here, the preset reference ratio includes a voltage ratio of 13200V: 4V and a current ratio of 630A: 0.63A. However, it should be recognized that this preset reference ratio is defined to match the ratio of the data processing unit 500 described above, and thus may be changed according to circumstances or a ratio defined by a user. After that, the processing unit 840 transfers the error value back to the correcting unit 830 . On the other hand, if these ratios are the same or within the error range, the current and voltage values measured in the power facility are considered accurate values. Also, when receiving the reference value and the value delivered from the control unit, the processing unit 840 separately records time and location information to help in subsequent maintenance.

The correction unit 830 actually corrects the converted value using the error value received from the processing unit 840 . To this end, although not shown in the figure, the correction unit 830 is a regulator including an electric motor to automatically adjust the variable resistance included in the data processing unit 500, and correction according to the error value calculated by the processing unit. and a regulator control unit that controls the regulator to perform. Here, the regulator may include not only the electric motor, but also any means capable of automatically adjusting the variable resistance. Accordingly, when receiving the error value transmitted from the processing unit 840, the adjuster control unit of the correction unit 830 instructs the adjuster to perform correction based on the error value. The regulator then adjusts the variable resistance by the transmitted error value according to this instruction. After the adjustment is made, a confirmation procedure is performed to ensure that the adjustment has been made correctly.

Accordingly, when the adjustment process is completed, the corrected value is transmitted to the processing unit 840 again. When the processing unit 840 receives the corrected value, a comparison between the ratio of the reference value and the corrected value and the preset reference ratio is performed again, and the process described above is performed. This process is repeated until it is judged that the calibrated value is correctly calibrated.

Through the preceding process, errors that may occur during measurement in power facilities, errors that may occur during conversion in the data processing unit 500, or errors that may occur during transfer of measured values from the data processing unit 500 to the user's smartphone are corrected. It can be.

In addition, although it has been described that both current and voltage are measured and corrected based on them in the above process, measuring only one of the current and voltage and correcting only one of them may also be performed.

The present invention receives the operating voltage from the electric vehicle charger body and measures the AC/DC current directly from the electric vehicle charger connection jack to solve the charge dispute based on cable efficiency, and based on the measured DC voltage and current data, the charging user's accurate Not only can you measure and charge active and reactive power, maximum demand power, metering and power factor by time zone, but also transmit meter reading and charging data to electric vehicle chargers or mobile phone applications using various wired and wireless communication methods. It is possible to provide real-time 1 second LP data and metering by time zone, and it is possible to modify and add functions by using F/W update at customer's request.

1: EV charger
10: power factor correction circuit (AC/DC) controller 11: inductor
12: MOSFET 13: second diode
20: DC blocking unit 21: 1a capacitor 22: 1b capacitor
30: AC high pressure divider
31: first resistor 32: second resistor
40: AC/DC conversion unit 41: first diode 42: second condenser
50: chattering removal unit
51: first integrated circuit 52: second integrated circuit
60: initial operation limiting unit 61: third resistor
62: third condenser
70: transistor
80: relay drive coil 81: relay contact
90: DC/DC transformer 91: switch
100: voltage sensor
200: current sensor
300: judgment detection unit
400: mode change unit
500: data processing unit
600: data storage unit
700: Ministry of Communication
800: error correction unit
900: Security Department

Claims (8)

A voltage sensor 100 for measuring AC/DC voltage;
Current sensor 200 for measuring AC/DC current;
Determination detection unit 300 for determining whether the power of the connected electric car charger 1 is AC/DC;
In the electric vehicle charger cable capable of AC/DC metering, characterized in that it includes a mode changing unit 400 that changes to AC charging or DC charging mode according to the result of determining whether AC/DC is determined by the determination detection unit 300,

Data for calculating the amount of active and reactive power used, maximum demand power measurement and power factor, meter reading and billing data through the voltage and current data of the electric vehicle charger 1 measured by the voltage sensor 100 and the current sensor 200 processing unit 500;
a data storage unit 600 for storing the data calculated by the data processing unit 500;
a communication unit 700 that transmits the data calculated by the data processing unit 500 to a meter reading server or a user's smartphone;
The data processing unit 500 measures LP data and metering for each time period,
The data processing unit 500 further comprises an error correction unit 800 having an error correction algorithm function for the calculated data.
delete delete delete delete delete The method of claim 1,
The communication unit 700 has an AC / DC metering electric vehicle charger cable, characterized in that it has a firmware update function to update.
The method of claim 1,
An electric vehicle charger cable capable of measuring AC/DC, characterized in that it further comprises a security unit 900 to which a security algorithm that protects customer and transaction information from external hacking risk is applied.

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