KR101896572B1 - Electric vehicle charging control system - Google Patents

Abstract

The present invention relates to a system for controlling a charger for an electric vehicle, which improves user convenience by efficiently distributing electric power and simultaneously or consecutively charging a plurality of electric vehicles. The system for controlling a charger for an electric vehicle comprises an electric power distribution board, a plurality of chargers, and an operation server. The electric power distribution board is composed of a current measurement module including: a three-phase switch which opens or closes three-phase electric power supplied from a system while separating the three-phase electric power into each single-phase electric power; a single-phase switch which controls to supply the single-phase electric power separated from the three-phase switch to a charger connected to single-phase electric power lines; a current sensor which detects current flowing in each of the single-phase electric power lines; an AD converter which is inputted with AC power from the three-phase switch and converts the AC power into DC power; a temperature sensor which detects the temperature inside the distribution board; a communication unit which transmits the current detected by the current sensor to the outside; and a control unit which transmits the current detected by the current sensor to the outside through the communication unit, and controls the opening and closing of the three-phase or single-phase switch depending on commands transmitted from the outside and the temperature detected by the temperature sensor. The plurality of chargers are installed in the single-phase electric power line. The operation server includes: a charging information collecting unit which collects supply current information supplied to electric vehicles connected to the charger, and measurement current information flowing through the single-phase electric power line where the charger is installed; and a charger driving control unit which controls the drive of the chargers installed in the single-phase electric power line according to the information collected by the charging information collecting unit.

Description

[0001] Electric vehicle charging control system [

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an electric vehicle charging system, and more particularly, to an electric vehicle charging control system in which electric power is efficiently distributed to charge a plurality of electric vehicles simultaneously or sequentially, .

Due to the global strengthening of environmental remedies and energy saving trends, the development and dissemination of environmentally friendly electric vehicles is rapidly spreading in each country. To this end, a small-scale electric car charging station is installed and operated in a parking lot of a public housing complex or a public parking lot facility, and an electric vehicle charging system capable of operating unmanned is being promoted. The unmanned electric vehicle charging system should be equipped with a system that can control the charging process by using wired / wireless communication means, and should be equipped with a system for checking and checking charging progress in real time.

1 is a block diagram schematically showing an electric vehicle charging system according to the prior art.

As shown in the figure, charging of the electric vehicle is configured so that the charger 1 is supplied with electric power from the system 2 and drives the battery car 3. Generally, since one charger 1 is configured to charge one electric vehicle 1, a plurality of chargers 1 are provided in one system 1 for charging a plurality of electric vehicles. However, in the charging system according to the related art, there is a limit to the power supplied from the system, so there are limitations in installing a plurality of chargers, and as a result, there is a limit to the number of charging the electric vehicle at the same time.

In recent years, an unmanned charging system charging an electric vehicle by a user himself is becoming common. The electric car unmanned charging system has a difficulty in using the charger while the user operates the charger, and it is difficult to grasp the emergency situation such as a failure in real time and take measures. In addition, there is a limitation in paying the cost of charging and controlling the charging system to be driven under optimum conditions remotely.

In addition, in order to operate the unmanned charging system, a wired / wireless communication facility must be installed together with a charger for controlling the charger. In addition, a large amount of money, manpower, and time are required to install the wired / wireless communication facility.

Open Patent Publication No. 10-2017-0089190 (Electric Vehicle Charging Control System) Japanese Patent Application Laid-Open No. 10-2017-0121628 (charging system and charging method of electric vehicle)

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the above-mentioned problems, and it is an object of the present invention to provide a battery charger in which a plurality of chargers are installed on each electric power line and power is appropriately distributed to each charger, To thereby improve the convenience of the user.

It is another object of the present invention to provide an electric vehicle charger control system capable of reducing installation and operation costs of a charging system.

To achieve the above object, the present invention provides an electric vehicle charger control system comprising: a three-phase switch for opening and closing three-phase electric power supplied from a system while separating the three-phase electric power into respective single-phase electric power; Phase electric power line, a current sensor for sensing a current flowing through each single-phase power line, an AD converter for receiving an AC power from the three-phase switch and converting the DC power into a DC power source, A communication unit for transmitting a current sensed by the current sensor to the outside, and a controller for transmitting a current sensed by the current sensor to the outside through the communication unit, and a command transmitted from outside and a temperature sensed by the temperature sensor And a control unit for controlling the opening and closing of the three-phase or single-phase switch, Power distribution panel comprising; A plurality of chargers installed in the single-phase power line; A charge information collecting unit for collecting supply current information to be supplied to an electric car connected to the charger and measurement current information flowing through a single phase power line provided with a charger; And an operating server including a charger drive control unit for controlling driving of installed chargers, wherein the operating server turns off the driving of one or more chargers being charged if the measured current information is different from the sum of the supplied current information .

The operation server may further include a switch control unit and is configured to turn off the three-phase switch or the single-phase switch when a difference between the supply current information and the measured current information is continuously generated .

The operating server may be configured to turn off the driving of one or more chargers being charged when the measured current information is greater than the sum of the supply current information.

The charging information collecting unit further collects connection information of the electric vehicle connected to the charger, and when the measured current information is different from the sum of the supply current information, the operating server temporarily stores the charging information of the charger And to turn off the driving.

And a gateway for connecting the charger and the power distribution board to the operation server.

Also, the gateway is connected to a plurality of the chargers and the power distribution board through a Zigbee communication module, and is connected to the operating server through an Ethernet communication module.

In the present invention, since a plurality of chargers are installed in one power line and power supplied from each charger is efficiently distributed, charging is performed even if the user does not wait separately for a plurality of electric vehicles, thereby improving convenience.

In addition, the present invention compares the current supplied from the charger with the current flowing through the actual power line for a plurality of chargers installed in one power line in real time to determine whether the charger is in trouble or not, .

In addition, the present invention can efficiently manage and control a charger installed in an underground parking lot or an outer area.

1 is a block diagram showing a schematic structure of an electric vehicle charging system according to the prior art,
2 is a block diagram illustrating an electric vehicle charger control system according to an embodiment of the present invention;
3 is a block diagram showing a charger installation structure of an electric vehicle charger control system according to an embodiment of the present invention;
FIG. 4 is a block diagram showing a main configuration of a power distribution board, which is the main part of FIG. 2;
FIG. 5 is a block diagram illustrating a main configuration of the main host operating server of FIG. 2. Referring to FIG.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a block diagram showing an electric car charger control system according to an embodiment of the present invention, FIG. 3 is a block diagram showing a charger installation structure of an electric car charger control system according to an embodiment of the present invention, 2 is a block diagram showing a main configuration of a power distribution board which is a main part of FIG. 2, and FIG. 5 is a block diagram showing a main configuration of a main operation server of FIG.

As shown in FIG. 2, the electric vehicle charging system of the present invention includes a charger 100 installed in a parking lot of a public housing complex, a public parking lot or a parking lot of a general building, An electric power distribution board 200 for supplying electric power to the charger 100 and sensing power consumed for actual charging in the charger 100 and an operation server 300 for controlling charging to be performed according to the set electric current when the electric car is connected to the charger 100, And communication information with the charging server 100 and the power distribution board 200 to receive charging information being charged in the charging apparatus 100 and actual charging information of the plurality of charging apparatuses confirmed in the power distribution board 200, ) And receives the control information of the charger and the switch from the operation server 300 and provides the control information to the charger 100 and the power distribution board 200 Way 400.

As shown in FIG. 3, the charger 100 is provided with a plurality of power lines L1, L2 and L3 for each phase separated in a single phase by a power distribution board 200. For example, 10 to 10 chargers # 1 to # 10 are connected to 10 chargers # 1 to # 10 on the L1 power line, 10 chargers # 11 to # 20 on the power line L2 of S phase, 30, respectively. Each of the power lines is supplied with a predetermined power, and each of the chargers 100 can have the same maximum amount of charge. However, since the amount of charge electric power varies depending on the type of the electric vehicle, It is preferable to set them to be different from each other in terms of efficiency of power distribution.

Each of the chargers 100 is configured to provide supply current information to the operation server 300 via the gateway 400 for charging the electric vehicle. To this end, the charger 100 includes a current sensor And the communication means may comprise a zigbee communication module.

The power distribution panel 200 separates power supplied in three phases into a single phase and senses a current supplied through the power lines of each phase. 4, the power distribution board 200 includes a three-phase switch 210 for opening and closing a three-phase power line L of a system into power lines L1, L2 and L3 of a single phase, A single-phase switch 220 for opening and closing to supply power to each charger connected to each single-phase power line, and a current measuring module 240 for sensing a current supplied through each single-phase power line.

The three-phase switch 210 and the single-phase switch 220 are turned on and off according to a command transmitted from the operation server 300 to open and close the power supplied to each power line. In addition, the three-phase switch 210 separates power supplied to the three phases from the system into three phases of R phase, S phase, and T phase, and supplies power to the three phases. Also, the single-phase switch 220 is composed of first to third single-phase switches provided in the power lines of each phase.

The current measurement module 240 transmits measurement current information that measures the current flowing along the power line of each phase to the operation server 300. Also, the current measurement module 240 is connected to the three-phase switch 210 through another single-phase switch 230 to receive power for driving.

The current measuring module 240 for this purpose includes first to third current sensors 241 connected to the power lines of each phase to measure currents, an AD converter receiving the AC power from the three- A communication unit 244 for transmitting the current sensed by the current sensor 241 to the operation server 300 and a communication unit 242 for sensing the current detected by the current sensor 241. The temperature sensor 243 senses the temperature of the inside of the distribution board 242, And a control unit 245 for controlling the opening and closing of the three-phase switch 210 or the single-phase switch 220 according to an instruction transmitted from the outside through the communication unit 244. The controller 245 is configured to control the opening and closing of the three-phase switch 210 or the single-phase switch 220 according to the temperature sensed by the temperature sensor 243.

The communication unit 244 may be divided into a first communication unit and a second communication unit. The first communication unit is configured to transmit and receive information to and from the operation server 300 through the gateway 400. The second communication unit is configured to directly transmit and receive information to and from the operation server.

The first communication unit may be configured as a Zigbee communication module. The Zigbee communication module enables information transmission to be simultaneously performed between the plurality of chargers 100 and the power distribution board 200 and the gateway 400.

The second communication unit may be an IoT (Internet of Thing) module capable of communicating using an LTE communication network. In particular, the second communication unit may be an NB-IoT (Narrow Band IoT) module. The NB-IoT module is a communication method for intermittently transmitting a small amount of information, and can transmit information at low cost.

In general, information transmission of IoT module using LTE communication network is performed by main data line. In this case, it is possible to transmit a large amount of information and speed up information transmission speed, but there is a disadvantage that the cost of information transmission is high. On the other hand, the NB-IoT module transmits low capacity information using 180kHz bandwidth corresponding to one Resource Block, which is the minimum unit of resource allocation. Accordingly, the second communication unit configured by the NB-IoT module allows one operating server 300 to accommodate a plurality of power distribution boards 200, thereby efficiently transmitting and receiving information therebetween.

In addition, the second communication unit using the NB-IoT module is configured to transmit information using a resource block of a guard band defined in an LTE frequency band. In the LTE frequency band, a guard band of a 180 kHz bandwidth is inserted between LTE data bands (regular LTE data bands) for transmitting normal data. Therefore, the second communication unit transmits information using the guard band of the LTE communication, so that the second communication unit can transmit information with low power without interference with the LTE data. In addition, since the NB-IoT module simplifies the wireless signal and further increases the transmission distance, information can be transmitted and received even in a position where the wireless signal is not connected. Therefore, the second communication unit allows efficient management of the charger 100 installed at the same location as the underground parking lot of the building or the outer area.

The operation server 300 controls on / off of the three-phase or single-phase switches 210 and 220 according to supply current information transmitted from the charger 100 and measurement current information measured by the power distribution board 200, (100).

A predetermined current is supplied to the power lines of each phase in advance, for example, a current of 40 A can be supplied to each power line. At this time, ten chargers are installed in each power line, and each charger can be set to be supplied with a maximum current of 5A, 8A or 10A, and each charger is connected to the electric car And supplies the supply current information to the operation server 300 to supply the electric vehicle.

For example, when the amount of current to be supplied from ten chargers in a power line set to be supplied with a current of 40 A is more than 40 A, the operation server 300 may charge the charger in any one or more of the chargers After completion, the driving of the charger is controlled so that charging is sequentially performed in the other charger. Therefore, the user can confirm that the charging is completed after a predetermined time elapses even if the electric car is connected to the charger in which the charging is not proceeded.

5, the operation server 300 includes a charging information collecting unit 310, a charger driving control unit 320, an opening and closing operation control unit 330, a memory unit 340, a communication unit 350). The charging information collecting unit 310 collects connection information and supply current information from the charger 100 and collects measurement current information of the power line from the power distribution board 200. The charger drive control unit 320 determines a drive sequence for a plurality of chargers and controls driving of each charger. The switch control unit 330 controls the three-phase switch 110 or the single-phase switch 120 to be turned off when the measured current in the power distribution panel 200 is higher than the preset supply current or when abnormal information is sensed . The memory unit 340 stores charge information, and the communication unit 350 transmits information to the gateway 400 or the charger 100.

In addition, the operation server 300 is configured to control the driving of the charger or the switch by comparing the supply current information of each charger 100 with the measured current information of the power distribution board 200. The charger 100 is configured to transmit the current information to the operation server 300, which is supplied to the actual electric vehicle. However, when the operation server 300 receives the current information from the charger 100, .

In one example, a particular charger 100 can deliver a supply current telegram to the operating server 300 by supplying a current of 5A, while actually providing a current of 10A. At this time, an overload occurs in the circuit of the power line. If the total current of the power line exceeds 40 A, a serious problem may occur. Accordingly, the operating server 300 further collects the measured current information of the power distribution board 200 in addition to the supplied current information of the charger 100, and then transmits the measured current information to the sum of the supplied current information transmitted from each charger 100 When the measured current information is different from the sum of the supplied current information or when the measured current information is larger than the sum of the supplied current information, the driving of the charger or the switch is controlled and turned off. At this time, it is preferable that the charger is turned off, the electric car sequentially turns off the charger connected later, and the off-state of the charger can be turned off when the above-described difference continues.

The gateway 400 receives information from the plurality of chargers 100 and the power distribution board 200 and provides the information to the operation server 300. The gateway 400 transmits a drive command of the operation server 300 to each of the charger 100 and the power distribution board 200, (200) so as to control the driving. The gateway 400 may be connected to the charger 100 and the power distribution board 200 through a Zigbee communication module and may be connected to the operation server 300 through Ethernet.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.

100: Charger
200: Power distribution board
210: Three-phase switch 220: Single-phase switch
240: power measurement module 241: current sensor
242: AD converter 243: Temperature sensor
244:
300: Operational server
310: charge information collecting unit 320: charger drive control unit
330: Actuator drive control section 340: Memory section
350:
400: Gateway Way

Claims (6)

Phase power switch, a three-phase switch for opening and closing the three-phase power supplied from the system while separating the three-phase power supplied from the system into respective single-phase electric power, a single-phase switch for controlling the single phase electric power separated from the three-phase switch to be supplied to a charger connected to the single- Phase converter, an A / D converter for receiving an AC power from the three-phase switch and converting the AC power into a DC power source, a temperature sensor for sensing a temperature inside the distribution board, a communication unit for transmitting a current sensed by the current sensor to the outside And a controller for controlling the opening and closing of the three-phase or single-phase switch according to a command transmitted from the outside and a temperature sensed by the temperature sensor, the current being sensed by the current sensor, A power distribution board comprising a module;
A plurality of chargers installed in the single-phase power line; And
A charging information collecting unit for collecting charging current information supplied to an electric vehicle connected to the charger and measurement current information flowing through a single phase power line provided with a charging device; And an operating server including a charger drive control unit for controlling driving of the chargers,
Wherein the operating server is configured to turn off the driving of one or more chargers being charged when the measured current information is different from the sum of the supplied current information. The system according to claim 1,
Wherein the controller is further configured to turn off the three-phase switch or the single-phase switch when a difference between the supply current information and the measured current information is continuously generated. The system according to claim 1, wherein the operating server
And turns off the driving of any one or more of the chargers being charged when the measured current information is greater than the sum of the supply current information. The method according to claim 1,
The charging information collecting unit further collects connection information of the electric vehicle connected to the charger, and when the measured current information is different from the sum of the supply current information, the operating server drives the charger connected to the electric vehicle Off state of the electric vehicle charger control system. The method according to claim 1,
And a gate way connecting the charger and the power distribution board to the operation server. 6. The method according to claim 5,
And a plurality of the chargers and the power distribution board are connected to the ZigBee communication module, and are connected to the operating server through an Ethernet communication module.

Images