KR20230069505A - Apparatus and method for charging power - Google Patents

Abstract

The present invention is to perform communication with a plurality of electric vehicles using one PLC (Power Line Communication) module provided in one power charging device, and to supply power to charge the battery of the electric vehicle. A control unit that controls the transmission of charging power while communicating with the plurality of electric vehicles, and under the control of the control unit, communicates with the plurality of electric vehicles and transmits charging power to each of the plurality of electric vehicles. EVSE (Electric Vehicle Supply Equipment), one PLC (Power Line Communication) modem provided in the EVSE and communicating with the plurality of electric vehicles, and the EVSE, the PLC modem, and the plurality of electric vehicles A plurality of electric power units including a plurality of transmission cables provided between the plurality of transmission cables to transmit communication signals and charging power, and a plurality of filters provided between the one PLC modem and the plurality of transmission cables to filter the communication signals. It relates to a power charging device and method capable of charging power to a vehicle.

Description

Power charging device and method {Apparatus and method for charging power}

The present invention communicates with a plurality of electric vehicles using one power line communication (PLC) module, and supplies charging power to charge the batteries of the plurality of electric vehicles simultaneously. It relates to an apparatus and method.

An electric vehicle has a built-in battery and operates by driving various loads including an electric motor using electric power charged in the built-in battery.

Since the amount of power that can be stored in the battery is limited, the load cannot be driven when all the charged power is discharged.

Therefore, drivers of electric vehicles need to recharge the battery before the battery is completely discharged so as to continuously supply power to the load.

In addition to parking spaces where electric vehicles can be parked in parking lots or service areas, power charging devices are installed to charge the batteries of electric vehicles with power.

In order for the power charging device to supply charging power to the electric vehicle and charge the battery, the power charging device is provided with a PLC (Power Line Communication) modem.

The charging device communicates with an EVCC (Electric Vehicle Communication Controller) of the electric vehicle through the one PLC modem to obtain charging information of the electric vehicle, and transmits charging power according to the obtained charging information to the battery. so that it can be charged.

The PLC modem is very expensive, and performs communication with one electric vehicle to obtain charging information of the electric vehicle, and transmits charging power according to the obtained charging information to charge the battery of the single electric vehicle. Doing so is economically very inefficient.

Therefore, a technology capable of charging power to batteries of a plurality of electric vehicles using one power charging device is being developed.

Republic of Korea Patent Publication No. 10-2017-0068877 (published on June 21, 2017) is known as a prior art in which one power charging device can charge the batteries of a plurality of electric vehicles.

In the prior art, a plurality of sub chargers are connected to one main charger, and the plurality of sub chargers are used to supply power to a plurality of electric vehicles to charge batteries, and the main charger to the plurality of sub chargers. It includes a control function that controls to reduce standby power by identifying the amount of charge in and cutting off the power supply when waiting for charging. In addition, the main charger uses PLC communication to control the operation of each sub charger and sub In addition to displaying the charging amount of the charger on the display device, it is transmitted to the server using the Ethernet/PLC communication method.

In the prior art described above, a plurality of sub chargers must be provided in one power charging device. In addition, the prior art described above is suitable for manually charging power by connecting a plurality of electric vehicles to a power charging device, and transmits power to be charged to a battery without considering the amount of power supplied to charge the electric vehicle. In the case of charging the battery of the battery, it took a lot of charging time.

Republic of Korea Patent Publication No. 10-2017-0068877 (2017. 06. 20. Publication)

The problem to be solved by the present invention is to provide a single PLC modem in a power charging device, and supply charging power to each of a plurality of electric vehicles using the single PLC modem so that each of the plurality of electric vehicles is charged to the battery. A power transmission device and method capable of charging power are provided.

In addition, the problem to be solved by the present invention is a power transmission device capable of charging power to a battery by simultaneously supplying charging power to each of a plurality of electric vehicles within the range of charging power that can be supplied by the power charging device, and provides a way

In addition, the problem to be solved by the present invention is not limited to the above-mentioned problems, and other problems not mentioned are clearly understood by those skilled in the art from the description below. It could be.

The power charging device of the present invention includes a control unit that controls the transmission of charging power while communicating with a plurality of electric vehicles, and performs communication with the plurality of electric vehicles under the control of the control unit and supplies the electric power to the plurality of electric vehicles. An EVSE (Electric Vehicle Supply Equipment) for transmitting charging power to each vehicle, a PLC (Power Line Communication) modem provided in the EVSE and communicating with the plurality of electric vehicles, the EVSE and the EVSE A plurality of transmission cables provided between the PLC modem and the plurality of electric vehicles to transmit communication signals and the charging power, and a plurality of transmission cables provided between the one PLC modem and the plurality of transmission cables to filter the communication signals A plurality of filters may be included.

Between the one PLC modem and the plurality of filters, a relaying transformer for relaying a communication signal and a level limiting unit for limiting a voltage level of the communication signal may be further included.

In addition, the power charging method of the present invention includes the steps of obtaining charging information by a control unit communicating with one or more electric vehicles connected to each of a plurality of transmission cables through a single power line communication (PLC) modem; The controller may transmit charging power to a corresponding electric vehicle capable of supplying power according to the required charging information so that the corresponding electric vehicle can charge the battery with electric power.

The step in which the control unit performs communication with one or more electric vehicles connected to each of a plurality of transmission cables through one power line communication (PLC) modem to obtain charging information, wherein the control unit connects the plurality of transmission cables. Monitoring and determining whether one or more electric vehicles are connected may be included.

The step of allowing the controller to charge the battery by transmitting charging power to a corresponding electric vehicle capable of supplying power according to the required charging information, wherein the controller is supplying charging power. The method may include adjusting a supply amount of charging power by performing communication with the corresponding electric vehicle.

According to the power charging device and method of the present invention, a PLC modem performs communication with a plurality of electric vehicles to obtain charging information for each electric vehicle, and supplies charging power according to the obtained charging information. It allows the electric vehicle's battery to be charged with electricity.

Therefore, it is possible to supply power to multiple electric vehicles and charge power to batteries using only one PLC modem, and simultaneously supply charging power to multiple electric vehicles according to the amount of charging power that can be supplied. power can be charged.

Hereinafter, the present invention will be described in more detail through an embodiment that does not limit the present invention with reference to the accompanying drawings, and the same reference numerals are assigned to the same elements in some drawings.
1 is a circuit diagram showing the configuration of a power charging device of the present invention;
Figure 2 is a signal flow diagram showing the operation of the control unit according to the power charging method of the present invention, and
FIG. 3 is a signal flow diagram showing the power charging operation of FIG. 2 .

The following detailed description is merely an example, and merely illustrates an embodiment of the present invention. In addition, the principles and concepts of the present invention are presented for the purpose of being the most useful and readily explainable.

Therefore, it is not intended to provide more detailed structure than necessary for a basic understanding of the present invention, and various forms that can be practiced in the substance of the present invention by those skilled in the art are illustrated through the drawings.

1 is a circuit diagram showing the configuration of a power charging device of the present invention. Referring to FIG. 1, the power charging device of the present invention includes a control unit 100, an Electric Vehicle Supply Equipment (EVSE) 110, a Power Line Communication (PLC) modem 112, a relay transformer 120, and , a level limiter 130, a plurality of filters 140, 142, ..., 14N, and a plurality of transmission cables 150, 152, ..., 15N.

The control unit 100 controls the transmission operation of the overall charging power according to the required charging information of the vehicle acquired through communication with an EVCC (Electric Vehicle Communication Controller) (not shown) provided in the electric vehicle. do.

The EVSE 110 communicates with the EVCC provided in the electric vehicle and supplies charging power. The EVSE 110 may include a PLC modem 112 for communicating with the EVCC. The PLC modem 112 may communicate with the EVCC to acquire charging information required for the electric vehicle to charge the battery with power.

The relaying transformer 120 is provided between the EVCC and relays the transmission signal (Tx) and the reception signal (Rx) so that the transmission signal (Tx) provided by the PLC modem 112 can be transmitted to the EVCC. After conversion, the received signal (Rx) transmitted by the EVCC may be provided to the PLC modem 112.

The level limiting unit 130 is composed of a constant voltage diode and a diode, and may limit the maximum levels of the transmission signal Tx and the reception signal Rx.

The plurality of filters 140, 142, ..., 14N may filter and pass the transmission signal Tx and the reception signal Rx and remove noise signals.

The plurality of transmission cables 150, 152, ..., 15N are connected to EVCCs of a plurality of electric vehicles with connectors attached to one end, and transmit a transmission signal (Tx) and a reception signal (Rx) and power for charging.

2 is a signal flow diagram showing the operation of the controller 100 according to the power charging method of the present invention. Referring to FIG. 2, the control unit 100 monitors each of the plurality of transmission cables 150, 152, ..., 15N (S200), and as a result of monitoring, the plurality of transmission cables 150, 152, ..., 15N It is determined whether or not the electric vehicle is connected (S202).

In general, a monitoring voltage of about 12V is applied to the communication lines of the transmission cables 150, 152, ..., 15N, and the monitoring voltage is applied when the connector of the transmission cables 150, 152, ..., 15N is connected to an electric vehicle. The voltage is configured to drop by about 9V, and the electric vehicle is connected to the plurality of transmission cables 150, 152, ..., 15N by using the voltage change of the communication line of the transmission cables 150, 152, ..., 15N. It can be determined whether or not it is connected.

To this end, the present invention may further include a voltage fluctuation monitor capable of monitoring the voltage fluctuation of the communication line.

The voltage fluctuation monitor is general, and detailed configuration and operation descriptions are omitted.

When it is determined that the electric vehicle is connected to the transmission cables 150, 152, ..., 15N, the controller 100 communicates with the EVCC of the electric vehicle through the PLC modem 112 of the EVSE 110 (S204 ), and as a result of performing the communication, charging information of the electric vehicle is acquired (S206).

That is, the transmission signal (Tx) output from the PLC modem 112 is transmitted through the relay transformer 120, the level limiting unit 130, the filters 140, 142, ..., 14N, and the transmission cables 150, 152, ..., 15N. ) is sequentially transmitted to the EVCC of the electric vehicle, and the communication signal transmitted by the EVCC of the electric vehicle is transmitted through the transmission cables 150, 152, ..., 15N, the filters 140, 142, ..., 14N, the level limiting unit ( 130) and the relay transformer 120 are sequentially input to the PLC modem 112 as a received signal (Rx) to perform communication.

The received signal Rx includes charging required information for charging power in the battery, including charging power amount and charging current of the battery provided in the electric vehicle, and the control unit 100 controls the received signal (Rx) acquires charging required information.

When the required charging information is obtained, the control unit 100 determines whether or not power can be supplied to the corresponding electric vehicle according to the required charging information (S208).

As a result of the determination, when it is possible to supply power according to the required charging information, the control unit 100 performs a power transmission process to supply charging power to the corresponding electric vehicle and to charge the battery.

And, as a result of the determination, when power cannot be supplied according to the required charging information, the control unit 100 requests charging standby until charging power can be supplied to the corresponding electric vehicle (S212), and supplies charging power. I never do that.

That is, the control unit 100 supplies charging power by performing a power transmission process for the electric vehicle when the electric vehicle currently connected to the transmission cables 150, 152, ..., 15N can supply the required power. and to charge the battery with power.

In addition, the control unit 100 supplies charging power to the electric vehicle previously connected to the transmission cables 150, 152, ..., 15N, so that the electric vehicle newly connected to the transmission cables 150, 152, ..., 15N When the requested power cannot be supplied, the electric vehicle is requested to wait for charging until charging power can be supplied.

FIG. 3 is a signal flow diagram showing the power charging operation of FIG. 2 . Referring to FIG. 3 , the control unit 100 permits transmission of power to the corresponding electric vehicle (S300), controls the EVSE 110 to transmit charging power required by the electric vehicle, and then the corresponding electric vehicle battery to be able to charge power.

The control unit 100 continuously communicates with the electric vehicle through the PLC modem 112 (S304), and adjusts the amount of power for charging to be transmitted according to the communication result (S306).

That is, as the electric vehicle is charged with power in the battery, the required amount of power can be variable, for example, reduced, and the control unit 100 adjusts the amount of power for charging to be transmitted according to the communication result so that the electric vehicle is optimized. While allowing the battery to be charged with power in the state of, power consumption is minimized.

Then, the control unit 100 determines whether or not charging of the battery of the electric vehicle is completed (S308). That is, the electric vehicle notifies the control unit 100 that charging has been completed by performing communication when the power charging of the battery is completed.

The control unit 100 determines whether or not the power charging of the battery is completed from the received signal Rx of the electric vehicle, and returns to step S304 when the power charging is not completed, and transmits while performing communication. Adjust the amount of power for charging.

And when the power charging of the battery is completed, the control unit 100 stops the transmission operation of the charging power (S310) and ends.

In the above, the present invention has been described in detail through representative embodiments, but those skilled in the art can make various modifications to the above-described embodiments without departing from the scope of the present invention. All or part of each of the embodiments may be selectively combined to be configured.

Therefore, the scope of the present invention should not be limited to the described embodiments and should not be defined, and should be defined by not only the claims to be described later, but also those equivalent to these claims.

100: control unit 110: EVSE
112: PLC modem 120: relay transformer
130: level limiting unit 140, 142, ... , 14N: multiple filters
150, 152, ... , 15N: multiple transmission cables

Claims (5)

a controller controlling transmission of charging power while communicating with a plurality of electric vehicles;
an EVSE (Electric Vehicle Supply Equipment) that communicates with the plurality of electric vehicles and transmits electric power for charging to each of the plurality of electric vehicles under the control of the control unit;
One power line communication (PLC) modem provided in the EVSE and communicating with the plurality of electric vehicles;
a plurality of transmission cables provided between the EVSE and the PLC modem and the plurality of electric vehicles to transmit communication signals and the charging power; and
A power charging device including a plurality of filters provided between the one PLC modem and the plurality of transmission cables to filter communication signals.
According to claim 1,
Between the one PLC modem and the plurality of filters,
relaying transformers that relay communication signals; and
The power charging device further comprising a; level limiting unit for limiting the voltage level of the communication signal.
Acquiring, by a control unit, charging necessity information by performing communication with one or more electric vehicles connected to each of a plurality of transmission cables through one power line communication (PLC) modem; and
and transmitting, by the control unit, charging power to a corresponding electric vehicle capable of supplying power according to the required charging information so that the corresponding electric vehicle can charge the battery with power.
According to claim 3,
The step of obtaining charging information by the control unit performing communication with one or more electric vehicles connected to each of a plurality of transmission cables through one PLC (Power Line Communication) modem,
and determining, by the control unit, whether one or more electric vehicles are connected by monitoring the plurality of transmission cables.
According to claim 3,
The step of allowing the control unit to transmit charging power to a corresponding electric vehicle capable of supplying power according to the required charging information so that the corresponding electric vehicle can charge the battery with power,
and controlling, by the control unit, a supply amount of charging power by performing communication with a corresponding electric vehicle that is supplying charging power.

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