KR101214448B1 - Charging infrastructure using communication network and chaging control method of the same - Google Patents

Abstract

PURPOSE: A charging infrastructure including a communication network between chargers and a charging control method thereof are provided to efficiently charge a battery of an electric device by using the communication network between the chargers. CONSTITUTION: An integrated management server(20) integrally manages a plurality of chargers(10a) and comprises a charging network by being connected by wired or wireless communication network. A communication module communicates with another charger and the integrated management server by a wire/wireless communication network. An electric vehicle receives and transmits basic information and signal for charging from and to the charger. A user searches various information using a mobile communication terminal(40). [Reference numerals] (AA) Wired/wireless communication network(CDMA, Internet); (BB) Charging network(wired/wireless communication network)

Description

Charging infrastructure using communication network and charging control method including a communication network between chargers

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a charging facility and a charging control method thereof, and more particularly, to a charging facility and a charging control method thereof capable of more efficiently charging a battery of an electric device using a communication network configured between a plurality of chargers. .

Today, internal combustion engine vehicles using fossil fuels have many problems such as environmental pollution caused by exhaust gas, respiratory disease caused by ozone generation, global warming due to carbon dioxide, and the like.

Also, because of the limited fossil fuels that exist on the earth, they are in danger of exhaustion someday.

To this end, we are making great efforts to develop and disseminate eco-friendly vehicles such as pure electric vehicles (EVs) that use electric motors as driving sources and hybrid vehicles (HEVs) that use electric motors as driving sources together with internal combustion engines. The technology of electric energy storage devices such as batteries, which are the power source of eco-friendly cars, is also rapidly developing.

In addition, the company is making great efforts to research and develop in-vehicle and external devices and facilities for battery charging and to expand charging infrastructure.

As is well known, an electric motor or a hybrid vehicle includes an electric motor which is a driving source of a vehicle, a motor controller (MCU) for driving and controlling the electric motor, and an electric energy storage device for supplying operating power of the electric motor. A battery, an in-vehicle charging device for charging the battery, and the like are mounted, and a charging port (inlet, connector), etc., for connecting between the vehicle and the external charger is provided.

Among them, high-capacity high-voltage batteries are used to secure sufficient driving distance as electric vehicles. Recently, lithium-ion batteries have become popular.

In addition, the electric vehicle is equipped with a battery management system (BMS) that monitors the state of the battery, which is collected while collecting battery information such as battery voltage, temperature, state of charge (hereinafter referred to as 'SOC') The battery information is provided to other controllers inside and outside the vehicle for use in vehicle control, charging control, and the like.

Meanwhile, in order to charge the battery of an electric vehicle (EV) or a plug-in hybrid vehicle (PHEV), an electric vehicle charging equipment (EVCE) connected to a distribution system must be used. Etc.) to a vehicle to charge the battery slowly, or to quickly charge the battery using a direct current (DC) power source.

That is, by connecting the slow charger to the charging port of the vehicle, the slow charging of the battery is performed under the control of the on-board charger (hereinafter referred to as 'OBC') and the BMS, or the rapid charger at the charging port of the vehicle. Connect to allow rapid charging under the control of the BMS.

A slow charger (AC charger) is a charger that uses single-phase AC power. When the slow charger provides AC power to a vehicle, the battery is charged through the OBC in the vehicle, and an in-vehicle converter converts AC power into DC power. It will charge electrical energy.

On the other hand, the fast charger is a charger that converts three-phase AC power into direct current and supplies it to the vehicle, and is directly connected to the battery in the vehicle to charge electrical energy, and provides a higher current to finish charging the battery in a shorter time. It can be used if you need to charge the battery quickly while driving.

Meanwhile, according to a vehicle operation report of an internal combustion engine vehicle (gasoline / diesel / LPG vehicle), about 80% of the vehicles are stopped in the garage or the company parking lot, and only about 20% are in operation. .

In terms of electric vehicles, it means that 80% of vehicles are likely to be charged for a long time.

All vehicles do not attempt to charge when the battery SOC is 0%, and statistics show that most attempts to charge AC battery (full charge) when the battery SOC is between 30% and 50%. .

In addition, most drivers who use AC chargers expect that the vehicle will be charged for a relatively long time after connecting the vehicle to the charger. Therefore, most AC chargers are connected to the vehicle longer than the actual charging time, resulting in increased efficiency. Falls.

If the driver continues to occupy the charger while the vehicle is connected, even if the vehicle is fully charged, there is no way for another vehicle to charge the vehicle while occupying the vehicle. This can be lengthy, and charging can be very cumbersome for the driver.

In order to solve this problem, there is a way to reduce the psychological waiting time of the driver by increasing the number of chargers, but there is a limit to starting the actual charging of the vehicle when the power capacity that each charger can supply is limited. The connection to the charger does not mean that the actual charge is made.

In other words, the total power capacity that can be supplied by the entire charging station is limited by the supply contract, so when the number of chargers is increased, when a large number of chargers are being used for charging at the same time, in some cases the vehicle is connected to a specific charger. In some cases, the actual charging may not start, and a waiting time is required.

In addition, even though only the vehicle is connected to another charger and the actual charging is not performed, the charging in each charger can be charged only within the set maximum amount of power that is not considered at all. There is a problem with this falling.

In addition, even if there is enough room for charging in other chargers, the driver often fails to satisfy the desired charging time, and even if the driver wants to charge quickly, it is impossible to shorten the charging time.

In addition, when only the number of chargers is increased, a separate central controller is required to manage and control the state of each charger, and when one charger ends charging, it is necessary to allow another charger to start charging. It is not possible to implement this.

Accordingly, the present invention has been made to solve the above problems, and an object of the present invention is to provide a charging facility and a charging control method thereof capable of more efficiently charging an electric device such as an electric vehicle.

In addition, the present invention can reduce the installation cost by reducing the power capacity of the entire charging station (capacity due to the supply contract, etc.) from the perspective of the contractor, the charging equipment and charging control method that can operate more chargers through the maximized charging efficiency The purpose is to provide.

Also, in terms of charging service, it finds the optimal charging current provided by each charger and can provide the same service as the existing environment even if the number of chargers is increased, providing efficient charging and optimal charging conditions, reducing user waiting time, An object of the present invention is to provide a charging facility having various advantages such as providing a stable driving environment and a charging control method thereof.

In order to achieve the above object, the present invention includes a plurality of chargers for charging the battery of the electrical device according to the user's charge request, so that the plurality of chargers can be communicatively connected to form a communication network, Each charger includes a communication module for communication between chargers, and a control unit for generating and outputting a signal to be transmitted to another charger through the communication module and a signal for controlling the amount of charging current supplied to the battery during charging. The controller calculates the amount of current required to charge the battery according to the charging request information input by the user, communicates with other chargers, checks the charger with the amount of available current, and yields the amount of current from the other charger with the amount of available current. Performing the yield current receiving process and receiving the yield from the other charger It provides a charging facility, characterized in that it determines the amount of current available for its own charge for reflecting the amount of current.

The present invention provides a charging control method of a charging facility in which a plurality of chargers for charging a battery of an electric device according to a user's charging request are connected to communicate with each other through a communication module to form a communication network. Calculating, by the charger receiving the charge request information, the amount of current required to charge the battery according to the charge request information of the user; Confirming a charger having a margin of available current amount through communication with another charger, and performing a current yield yield process that yields a current amount from another charger having a margin of available current amount; And determining the amount of the supplyable current for charging the battery by reflecting the amount of current received from the other charger, wherein the charging control method of the charging facility using the communication network between the chargers is performed.

Accordingly, according to the charging device of the present invention and the charging control method thereof, when a specific charger does not meet a required charge amount corresponding to a user's charge request by itself, a current amount yielding process that yields a current amount from another charger through a charging network is performed. This has the advantage of enabling faster and more efficient charging.

In addition, the contractor can reduce the installation cost by reducing the power capacity of the entire charging station, and maximize the charging efficiency to operate more chargers.

In addition, by finding the optimal charging current supplied by each charger, it can provide the same service as the existing environment even if the number of chargers is increased, providing efficient charging and optimum charging conditions, reducing user waiting time, and providing a stable driving environment. It has several advantages.

1 and 2 are schematic diagrams illustrating a communication network in which a plurality of chargers and an integrated management server are connected through a wired / wireless communication network in an embodiment of the present invention.
3 is a schematic diagram illustrating a connection state between a mobile communication terminal of a user, a user PC, a charger, an integrated management server, and an electronic payment agent server in an embodiment of the present invention.
4 is a schematic diagram showing a power supply system of an entire charger and a communication network configured between chargers and an integrated management server in an embodiment of the present invention.
5 is a block diagram showing the configuration of each charger in an embodiment of the present invention.
FIG. 6 is a diagram illustrating a message transfer between a charger and another charger whose required current amount exceeds a specified current amount in an embodiment of the present invention.
7 is a view showing a current amount return process after the end of charging in an embodiment of the present invention.
8 is a view showing a current amount return process during charging in an embodiment of the present invention.
9 and 10 are diagrams collectively showing the charging process according to an embodiment of the present invention, and the connection relationship between each charger and the integrated management server.
FIG. 11 is a view illustrating a current amount return process during charging described in FIG. 8 and a connection relationship between each charger and the integrated management server.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

The present invention relates to a charging facility capable of more efficiently charging a battery of an electric apparatus using a communication network connecting a plurality of chargers so as to communicate with each other, and a charging control method thereof.

Hereinafter, for the sake of clarity of the present invention, an example of an electric vehicle (EV) is described as an electric device to be charged in an embodiment, but the electric device is not limited to the electric vehicle in the present invention.

That is, the electric device to be charged of the present invention is not only a pure electric vehicle (EV) but also a plug-in hybrid vehicle (PHEV), a mobile communication terminal such as a laptop or a smart phone carried by a user, a tablet PC, a PDA, a PMP, or the like. It should be understood that the mobile terminal of the present invention includes any one or more of all electric devices in which the battery is charged by the external charger.

1 and 2 are schematic diagrams illustrating a communication network in which a plurality of chargers and an integrated management server are connected through a wired / wireless communication network in an embodiment of the present invention, and FIG. 3 is a charger, integrated in an embodiment of the present invention. It is a schematic diagram showing a communication connection state between a management server, an electronic payment agent (PG company / VAN company) server, a user's mobile communication terminal, and a user's PC.

4 is a schematic diagram showing the power supply system of the entire charger and the communication network configured between the chargers and the integrated management server in the embodiment of the present invention, Figure 5 is a block diagram showing the configuration of each charger in the embodiment of the present invention to be.

As shown in FIG. 1, in the present invention, a plurality of chargers (EVCEs) 10a and an integrated management server 20 for managing the integrated devices are connected to each other in a wired or wireless communication network. Connected to form a communication network (hereinafter referred to as a 'charging network').

In this case, the chargers 10a constituting one charging network are chargers in the charging station managed by the server 20 of the charger management company (which may be a power supplier or a separate operator), or by one integrated management server. It can be a charger in a managed user's home.

Of course, the present invention is not limited thereto, and a charging network is composed of chargers that can be managed by one integrated management server while exchanging messages and information with each other, regardless of the installation location, and through a wired / wireless communication network. Chargers connected to each other, that is, chargers that send and receive messages on a network when broadcasting a charge current request message (a message for requesting a current yield as described below) become chargers belonging to the same charging network.

In addition, although one integrated management server 20 may be configured to integrate and manage chargers 10a belonging to a single charging network, the present invention is not limited thereto, and a plurality of charging networks may be targeted, that is, chargers belonging to a plurality of charging networks are integrated. It may be configured to manage.

In addition, the plurality of integrated management server 20 may be provided to divide and manage the plurality of chargers (10a) belonging to a single charging network.

In addition, one type of charger group or two types of mixed charger groups of the slow charger 10a and the rapid charger 10b may constitute a charging network. For example, the charger group may use an electric vehicle using single-phase AC power. It may be a group of slow chargers, i.e., AC chargers 10a, which slowly charge the battery through my OBC, or, as shown in FIGS. 2 and 4, a three-phase AC power supply with a AC charger 10a. ) May be a group further including a quick charger, that is, a DC charger 10b.

Furthermore, for the construction of the charging network, each charger 10a, 10b is in addition to the known basic configuration of the charger for charging the battery of the electric device, that is, the battery 4 of the electric vehicle 1 according to the user's request. As shown in 5, a communication module 12 for performing communication with other chargers 10a and 10b and the integrated management server 20 through a wired / wireless communication network is further provided.

For example, for the communication between the chargers 10a and 10b and the chargers, and between the chargers 10a and 10b and the integrated management server 20, each charger and the integrated management server constituting the charging network may be RS232 / RS485 communication, Communication module 11 for performing wired / wireless communication such as power line communication (hereinafter referred to as 'PLC communication'), Ethernet, GSM, CDMA, HSPA, Internet (Wirbo, Wi-Fi), LTE, etc. Communication module (not shown).

Here, all of the chargers connected by the charging network may be allowed to communicate directly with the integrated management server, but preferably only a part of the entire chargers, more preferably only one selected charger, performs the direct communication with the integrated management server. It may be provided to.

However, when only one or two or more partial chargers are provided to perform direct communication with the integrated management server, the charger which is in direct communication with the integrated management server may provide various information and messages, such as messages, between the remaining chargers and the integrated management server. A role of relaying (see Figs. 9 to 10), so that the entire charger forms an organic connection that can be managed by the integrated management server while exchanging information and messages with the integrated management server.

1 and 2, an example of a charging network in which one charger 10a directly communicates with the integrated management server 20 through a wired / wireless communication network (CDMA / Internet, etc.) may be seen.

Reference numeral 1 denotes an electric vehicle, reference numeral 10a denotes an AC charger, reference numeral 10b denotes a DC charger, and when the electric vehicle 1 is connected to the chargers 10a and 10b for charging, Wired or wireless communication is performed between the chargers 10a and 10b to exchange basic information and signals necessary for charging.

Thus, in the present invention, each charger (10a, 10b) is provided with a communication module for communication with the vehicle 1, such as BMS or the like by a wired communication method such as PLC communication or CAN communication, or a known wireless communication method It is designed to communicate with in-vehicle devices, and communicates with the vehicle to receive various information necessary for charging such as vehicle information, battery information, and vehicle connection status information from the vehicle, as well as to transmit signals for charging to the vehicle. do.

For example, in the case of using PLC communication, a PLC modem 13 for communication with a vehicle must be provided in each of the chargers 10a and 10b, as illustrated in FIG. The charger receives information that can be taken by the vehicle 1 from the time of connection to disconnection.

For example, the chargers 10a and 10b are information provided from the BMS 2 of the vehicle through PLC communication. The charger 10a and 10b takes full charge when charging the battery at the maximum capacity (kWh), the maximum amount of the OBC (A), and the maximum current. Along with basic and status information of the battery 4 for charging, such as hours (hours or minutes), initial SOC at the start of charging (SOC at the beginning of charging), and battery voltage and current in real time during charging to create an optimal charging environment. You will be informed about the temperature, temperature, etc.

For example, it may be information such as 16.4kWh as the battery capacity of the electric vehicle, 16A as the maximum amount of OBC current, 6 hours (360 minutes) as the time required when charging the battery as the maximum amount of OBC current.

Device elements for communication such as PLC communication and CAN communication in electric vehicles and chargers are well known technical details, and thus detailed descriptions thereof will be omitted.

3 illustrates an example of a charging network using an internet network, and shows an example in which the illustrated chargers 10a and 10b all perform direct communication with the integrated management server 20 through an internet network.

Referring to FIG. 3, a user may search for and receive various information provided by the integrated management server 20 through an internet network by using a mobile communication terminal 40 such as a smart phone that he carries. In operation 50, the information provided by the integrated management server 20 may be searched and provided using a web browser.

At this time, the user can register and log in to search for and receive information. This is a well-known and tolerable technical matter, so the description of the system configuration for the implementation will be omitted.

In addition, a separate communication module (not shown in FIG. 5) may be provided in the chargers 10a and 10b to enable communication with the user's mobile communication terminal 40, and for direct communication with the mobile communication terminal. The communication module of the charger may be a wireless module such as Bluetooth, ZigBee, or Wi-Fi.

As a result, the user may perform input of information required for charging, operation and control of a charger, etc. using his mobile communication terminal.

Basically, the input unit 16 which is operated by the user for inputting charging request information, charging start and stop, end operation, display information, etc. to the chargers 10a and 10b, and the charger operation and input state, the charger operation state, etc. It is well known that the display unit 17 including various types of information related to charging is provided.

In this case, the input unit 16 may be a button or a switch, and the display unit 17 may be a known display device that provides a display screen such as an LCD, and input and display functions are integrated instead of separately separating the input unit and the display unit. The touch screen may be applied.

Therefore, by using the input unit 16 and the display unit 17, the user can perform the input or charger operation / control necessary for charging directly in the charger (10a, 10b), the user directly to the charger Instead, the same operation as that of the charger may be performed using the mobile communication terminal 40 connected to the charger while the vehicle is connected to the charger.

Alternatively, as a user searches for or receives information provided by the integrated management server 20 through the Internet from the mobile communication terminal 40, the user's vehicle is connected to the Internet using a web browser of the mobile communication terminal 40. It is also possible to operate the chargers 10a and 10b.

That is, the user logs into the web of the integrated management server and inputs the charger unique information (or selects the charger to which the vehicle is connected) by using a wireless network such as Wi-Fi in his mobile terminal, and displays the charger on the display unit. After receiving the input and operation screen as displayed on the mobile terminal, check the screen displayed on the mobile terminal so that the input of the information required for charging or the charger operation / control input can be performed in the same way as the charger. It is.

In this case, the integrated management server basically has a function to remotely control each charger through a wired / wireless communication network, so that the user can remotely control the charger according to what the user inputs on the web using the mobile communication terminal or the user can use the charger. Provide input information.

In FIG. 5, the circuit breaker 14 is a component for supplying and cutting off power to the vehicle 1, so that power is supplied to the vehicle at the start of charging or interrupting power supplied to the vehicle at the time of stopping or terminating the charging.

In addition, the breaker 14 cuts off the power supplied to the vehicle when an emergency situation occurs during charging or when a charge stop request is transmitted from the integrated management server 20.

In addition, although not shown in Figure 5, the charger (10a, 10b) is an authentication system for performing user authentication in connection with the integrated management server 20, or external PG (Payment Gateway) (company) or VAN (Value Added Network) It is further provided with an electronic payment system for performing a charge fee payment in association with the company server (30).

For example, using an electronic tag equipped with an electronic tag (RFID chip) or an NFC chip for user authentication, for example, an electronic resident card or other smart card, a USIM card, or a USIM installed in a mobile communication terminal. After the user is authenticated for the user information from the integrated management server 20, the post-paid system for recording the amount of power used for charging the integrated management server to request payment to the user every month or in agreement with the user may be applied. .

Or use a credit card, check card, debit card, cash card, gift card, loyalty card, or recharge card as a payment method, and connect with an electronic payment agent (PG company / VAN company) designated by the charger management company according to the card. Thus, a prepaid system for billing may be applied.

When applying this postpayment, a reader (not shown) for reading user information of the electronic authentication card should be installed in the chargers 10a and 10b, and when applying the prepaid payment, the electronic payment is performed in connection with the PG company or the VAN company. Conventional electronic payment system should be established.

Of course, both the above-described postpaid and prepaid systems may be applied alone or in combination, and it is possible to apply one or two or more of various known user authentication methods and fee payment methods.

Referring to FIG. 3, it can be seen that the above-described information for user authentication / payment, charger status information for charger management and remote control, and remote control message are transferred between the charger 10a and the integrated management server 20. have.

In addition, the charger may be provided with known components such as a power meter (not shown) for measuring the amount of power supplied to the vehicle.

The control unit 11 of the charger (10a, 10b) receives the information input by the user through the input unit 16 or the mobile communication terminal 40 (in case of using a mobile communication terminal directly input or integrated management server from the mobile communication terminal) Can be inputted through a measurement element such as a power meter, and the operation of the display unit 17 for displaying information, the communication module 12 and the PLC modem 13 (communication with the vehicle). Communication module) to control the overall operation of the charger, such as the operation of the breaker (14).

In addition, the communication module 12 generates and outputs various messages and signals to be transmitted to other chargers 10a and 10b, the integrated management server 20, and the vehicle, and the other components of the charger from the integrated management server. Control the operation according to the remote control messages sent.

In addition, in the present invention, the integrated management server 20 may be provided by requesting status information to all the chargers 10a and 10b belonging to the charging network or a specific charger through a wired / wireless communication network, and also start charging the specific charger. It can deliver remote control messages for shutdown, stop and restart, and change the available charge current information of each charger in the charging network.

In addition, the administrator can transmit various control commands to the chargers 10a and 10b of the charging network according to the contents input through the input unit 21, and the information and location of the charger and the charging network information to which the charger belongs is stored in the database ( 23) collect, display, analyze, and store the charger status information data transmitted from the charger periodically, and grasping the display unit 22 or warning means in case of an error or an emergency Inform the administrator through

In addition, it stores and manages the registered user information in the database 23, performs user authentication using the user authentication information transmitted from the chargers 10a and 10b, and provides the authentication result to the charger.

In addition, it provides various charging-related information required by the user such as user charging information such as power usage by period and charger location information after authentication, and also reports and outputs the charger status information managed according to a predetermined form. It may have a function of predicting the amount of charging power required at a specific time by analyzing the state information.

Meanwhile, referring to FIG. 4, this is a view illustrating a power supply system of a charger in a charging facility according to the present invention, in which powers 9 may be distributed through power lines 9 from distributions 8 of chargers 10a and 10b. In this case, each of the chargers 10a and 10b supplies the electric power distributed from the distribution box 8 to the vehicle 1 as charging power.

In FIG. 4, the chargers 10a and 10b connected to the distribution box 8 are chargers that are communicatively connected through a wired / wireless communication network, that is, chargers constituting a charging network.

In addition, in the present invention, the number of chargers is not limited to the examples of the accompanying drawings, and various numbers of chargers may be managed by an integrated management server.

In the distribution box (8) connected to this group with the chargers 10a and 10b constituting a single charging network, a limited amount of power contracted by the charger management contractor with the power supplier is connected to the power line 9. Supplied through.

In the situation where the power supply capacity is limited to the contract capacity, the present invention provides a system configuration and a charging method for enabling more efficient and rapid charging using a charging network. The explanation is as follows.

Hereinafter, an example of a charging facility having one charging network will be described. The charging device of the present invention, in which the charging network is constructed, can be supplied with the maximum amount of current (or power amount, that is, the entire charger, which can be simultaneously supplied from the power supplier). Maximum current or maximum power) is limited to the amount of current concluded by the supply contract.

In this case, the maximum amount of current that each charger can supply to the vehicle may be determined according to the number of chargers in the charging facility. For example, in the related art, the maximum current amount that the charging station in which the charging facility is built is fastened with the power supplier is 72A, If the total number of chargers in the network is six, one charger can be set to supply a maximum of 12A (corresponding to the specified current amount described below) (in the present invention, as described later, the surplus current amount from another charger is yielded. The amount of current exceeding 12 A can be supplied to the battery).

First, a user authentication process is performed, and a user enters user information into the chargers 10a and 10b to be authenticated.

When the user brings his electronic authentication card (tag) to the chargers 10a and 10b for authentication, the charger acquires the user information stored in the electronic authentication card through the reader and transmits it to the integrated management server 20. The management server performs authentication on the transmitted user information and transmits the authentication result to the charger.

Accordingly, the chargers 10a and 10b display the authentication result, and the user confirms that the authentication is completed, connects his vehicle 1 to the charger, and then inputs the charge request information. It may also be set to connect first to the charger after the first input.

In the following, the operation of each component in the charger (10a, 10b) is carried out under the control of the control unit 11, and all the recognition is made in the charger during charging, except for the user input and operation part, the operation and the control subject are separately specified It is to be noted that the subject of the calculation, the judgment is the control.

When the user connects the vehicle to the charger for charging, communication between the vehicle and the charger (PLC or CAN communication, etc.) is made so that the battery information mounted on the vehicle 1 is transferred from the BMS 2 of the vehicle to the chargers 10a and 10b. Is passed on.

In this case, the chargers 10a and 10b charge the maximum capacity of the battery (kWh) from the vehicle 1, the maximum amount of current (OBC maximum amount of current) (A) that can be supplied to the battery 4, and the maximum amount of battery. Receives battery status information such as time required (hours or minutes) for charging, current battery voltage and SOC value.

Here, the information of the maximum battery capacity (for example, 16kWh), the maximum amount of current OBC (for example, 16A), the time required for the buffer (for example, 360 minutes) may be a value stored in advance in the charger (10a, 10b), in this case Since the information is unique information of the battery 4 and the vehicle OBC 3 and may vary depending on their specifications, the charger inputs the battery and OBC specification information from the vehicle's BMS in order to use the information stored in the charger in advance. On the basis of this, it should be possible to recognize the stored value of the battery corresponding to the specification, the maximum amount of OBC current, and the time required for the charging, which is stored according to the battery specification.

In addition, the chargers 10a and 10b may be set to display the battery information transmitted from the vehicle 1 through the display unit 17 (eg, the LCD).

When the user inputs the charge request information to the chargers 10a and 10b, the user determines a charging method and inputs a charge request directly from the charger, or inputs the charge request information through the mobile communication terminal 40 as described above. It is possible.

In the case of direct input from the chargers 10a and 10b, the user checks the contents displayed on the display unit 17 of the charger, determines the charging method, and inputs necessary information through the input unit 16 (eg, a button) (touch screen). Touch the screen to enter it).

In addition, when inputting through the mobile communication terminal 40, after connecting to the Internet, the charging request information related to the charging method is input on the web provided by the integrated management server 20, and the input charging request information is the integrated management server Is sent to the charger via.

As the charging request information input by the user, the SOC value to be charged (enter the amount of SOC to be charged) or the final SOC value (enter the target SOC value after charging) (e.g., 70%), the charging time (e.g., three hours or 180 minutes), the amount of charge, full charge can be selected or entered, or two or more can be selected and input.

When the charge request information is input as described above, the chargers 10a and 10b calculate the charge demand power and the charge demand current amount (hereinafter referred to as 'necessary current amount') to satisfy the user charge request, and calculate the calculated amount of the required current. Based on the final determination of the amount of charging current that can be supplied by the current charger (hereinafter referred to as 'supply current amount'), the user can use the supply current to charge as much as the user needs to charge (charge SOC value or final SOC value, charge time, charge amount, etc.) If so, the charging prediction information such as the expected total supply power, the estimated SOC value, the estimated charging time, the estimated charging amount, and the like are calculated and displayed on the screen of the display unit 17.

In this case, the user may check and charge the charging prediction information and then input and modify the charging request information as necessary. After the correction input, the charger displays the newly calculated charging prediction information on the screen of the display unit.

Therefore, when the user checks the charging prediction information and starts charging as it is, the user starts charging through the input unit 16 of the charger 10a or 10b (eg, presses the 'start charging' button on the input unit) to start charging. Will be entered.

In addition to the input of the charge request information, the display of the charge prediction information and the input of the start of charging may also be performed in the same manner as in the charger under communication with the charger in the user's mobile communication terminal, and the following description will display information about the user. It will be described that the user input and charging operation is performed in the charger, but all of the information display and user input / operation can be performed in the mobile communication terminal.

As a result, when the start of charging is input by the user, the chargers 10a and 10b start charging by allowing the battery 4 to be supplied with a current corresponding to the calculated amount of supplyable current, and the state of charge such as the charging progress rate during charging. Information is displayed via the display unit 17.

Battery charge control, which allows a predetermined charging current to be supplied to a battery, is a well-known technical matter in the art of charging, and a known technique is also applied to the present invention.

For example, the slow charger 10a transmits a charging current amount (in the present invention, 'supply current amount') to the BMS 2 in the vehicle 1, and the BMS controls the OBC 3 to supply the battery 4. In the case of the rapid charger 10b directly connected to the battery 4 or in the case of the rapid charger 10b directly connected to the battery 4, since the components corresponding to the OBC of the vehicle controlling the battery charging current are self-built, the chargers 10a and 10b may be changed according to the charging current amount. Direct supply and control of battery charge current.

In addition, at the start of charging, the chargers 10a and 10b send a charging start message indicating that the charging is started to all other chargers and the integrated management server 20 (see FIG. 10, EVCE m is a charger that starts charging).

After the charging is completed, the display unit 17 indicates to the user that all the charging process is completed so that the vehicle can be separated from the chargers 10a and 10b, and informs the user, where the charger performs normal communication at the end of charging with the vehicle. In addition, all other chargers and the integrated management server 20 sends a charge end message indicating that the end of the charge (see Fig. 10, EVCE m is the end of the charging).

On the other hand, in the present invention, when the charger that received the charging request based on the charging request information input by the user calculates the required current amount, and then determine the amount of supplyable current therefrom, the required current amount (hereinafter In the case of larger than the 'prescribed current amount', the charger communicates with another charger through the charging network, and thus, the main characteristic of the charger is to determine the supplyable current amount considering the state of the other charger.

That is, the charger that received the charge request checks the charger with the available current amount through communication with other chargers, and then partially receives the amount of current from the charger that is found to be able to charge the charge, and then the amount of its own supply current is greater than the specified current amount. The charging control is performed to increase the value and to charge the battery with the increased amount of supplyable current.

This allows for faster charging by chargers that are charged by the charger groups that make up the charging network, while ensuring that user charging requirements are met as much as possible even if the required current exceeds the specified amount of current. Greatly improve.

The charging process of the present invention will be described in more detail as follows.

First, the chargers 10a and 10b that have received a charge request calculate a required current amount from the user's charge request information. The required current amount that can satisfy the user's charge request is the maximum capacity of the battery inputted from the vehicle 1 (kWh), Can be obtained from the information of the OBC maximum current amount (A), the time required for the buffer.

Table 1 below shows the charging time required according to the battery charging current amount and the required charging power per minute in the battery having a maximum charging time of 16.4kWh and charging a maximum amount of OBC current of 16A at 360 minutes.

Referring to Table 1, the charging time is 360 minutes when charging a battery of the maximum capacity 16.4kWh with a battery charge current amount of 16A, the charging time is 576 minutes when charging with a battery charge current amount of 10A.

For example, assuming that the battery capacity of an electric vehicle is 16.4 kWh, the maximum OBC current is 16A, and the charging time is 360 minutes, the battery SOC of the electric vehicle to be charged is currently 70%, If the charging time is 150 minutes, the required charging power per minute can be calculated by Equation 1 below.

[ Equation  One]

Required charge power per minute = maximum battery capacity × (100%-current SOC%) / required time = (16400 × 0.3) / 150 = 32.8 W

If the required charge power per minute is 32.8W, the required current can be estimated as 12A in Table 1.

After all, if the information shown in Table 1 is stored in the storage unit 15 of the charger (10a, 10b), the controller 11 of the charger calculates the required current amount based on the stored information and the battery information transmitted from the vehicle can do.

Of course, for this purpose, information such as Table 1 of various batteries and OBC specifications should be stored in the storage unit 11 of the chargers 10a and 10b.

As a method of calculating the required amount of current, in addition to the above method, any one of various well-known methods for calculating the required amount of current required for charging may be selectively applied from the charge request information input by the user.

Next, each charger 10a, 10b is, after the required current amount is calculated as described above, the required current amount is set equally to each charger in consideration of the specified current amount (power supply capacity of the entire charger group, or by the integrated management server If the battery is less than or equal to the amount of the current specified by the user, the battery can be charged by the user. To charge.

On the other hand, if the amount of current required to meet the user's demand exceeds the specified amount of current, a charging current request message for yielding the amount of current is broadcasted to all other chargers in the charging network by broadcasting. Receive some of your concessions.

As a result, the charger that has yielded the current amount can set the supplyable current amount exceeding the specified current amount according to the user's demand, and the vehicle for charging the current amount (the supply current amount) higher than the specified current amount according to the required current amount that satisfies the user's demand Can be supplied to the battery.

This is an important feature in the charging facility and the charging control method according to the present invention, in the charger yielded by receiving a certain amount of current from another charger capable of yielding the charging current, the amount of charge current in the range below the OBC maximum current amount (supply It is possible to increase the amount of possible current) than the specified amount of current.

As a result, the battery can be charged more quickly in the charger yielding the current amount.

In particular, in a situation in which a total amount of current that can be supplied by a group of chargers connected to each other by a charging network as a whole is limited by a contract with a power supplier, in the conventional case, each charger may supply a current amount to a vehicle only within a specified current amount or less. Although a concession concept such as the present invention does not apply, in the present invention, a charger having a somewhat marginal amount of available current in consideration of charging and user charging needs (a current amount of less than the uncharged or specified current amount used for charging Part of the current allocation is given up by a specific charger (a charger whose required current is greater than the specified current amount), and the amount of current yielded is additionally used to charge the battery, thereby improving the overall charging efficiency of the charger group. do.

This means that a charger that has requested a concession yields a setpoint (if uncharged) or a surplus of current allocation in a range that can meet the user's charge requirements to a charger that cannot meet the current user's charge requirements. It applies the concept of increasing the amount of supplyable current in the charger that has requested the yield, that is, the charger that has sent the charge current request message. Since a charger is provided that cannot satisfy the user's charging demand with a specified amount of current, the charging efficiency of the charger group as a whole can be improved.

In order to allow such a current amount concession, in the present invention as described above, when a specific charger receives a user charge request, the required current amount is calculated based on the input user charge request, and then the required current amount is larger than the specified current amount. In this case, a process of broadcasting a message requesting yield of a current amount, that is, a charge current request message, is transmitted to another charger of a charging network.

However, if it is possible to meet the required current in the range below the rated current, the charger does not send a charge current request message. For example, if the required current is 12A or less than 12A when the regulated current is 12A, then the charge current request message Do not send.

If the required current amount is 12A, charging is performed by supplying a current of 12A to the battery by calculating the specified current amount 12A as the supplyable current amount.

In addition, if the required current amount is less than 12A, it may be set to calculate the required current amount as the supplyable current amount, but it is possible to supply a current amount higher than the required current amount in the range below the specified current amount because there is a margin of current amount compared to the specified current amount. It may be set to calculate the amount of current, and the battery is charged with the amount of supplyable current higher than the required amount of current.

For example, if the required current amount determined from the user charge request is 8A, the battery can be charged within the specified current amount 12A, so 2A corresponding to half of the difference between the specified current amount 12A and the required current amount 8A is required without sending a charge current request message. In addition to the current amount of 8A, 10A can be calculated as the supplyable current amount, thereby allowing the battery to be charged to 10A.

In addition, if the required current amount calculated according to the user charge request information exceeds the specified current amount 12A, in the conventional case, although the charging time takes a long time, the battery of the vehicle had to be charged with the specified current amount 12A, but the present invention yields the current amount to other chargers. To receive a current yield request, that is, a charge current request message is broadcasted, a series of current yield procedures are performed to yield the current amount from another charger.

FIG. 6 is a diagram illustrating a message transfer between a charger having a required current amount exceeding a specified current amount and another charger, and EVCE i is a charger requesting concession, and EVCE j is a charger constituting a charging network. Represents another charger in the group that is requested to yield (a charge current request message is sent).

The yield request of EVCE i consists of broadcasting a charge current request message to all chargers in the group before receiving the user charge request as described above, determining the required charge amount and determining the supplyable current amount.

Therefore, in FIG. 6, EVCE j represents all other chargers in the group except the specific charger which has made a request for concession, that is, all chargers except the charger of EVCE i.

In the following description of the embodiment, the recognition, determination and determination is performed by the controller of the charger, it is noted that the exchange of messages between the charger is made through a communication module operating under the control of the controller in each charger.

In FIG. 6, the charge current request message of the EVCE i requesting a yield is a message requesting the other chargers EVCE j to yield the current amount of a part of the specified current amount for their charging.

This may simply be a message containing the content of the current yield request, and preferably, in addition to the content of the current yield request, the message further includes the amount of current minus the prescribed amount of current, that is, additionally necessary amount of current information. Can be

For example, if the regulated current amount of EVCE i is 12A and the required current amount corresponding to the user charging request is 14A, in the present invention, since the required current amount of EVCE i exceeds the specified current amount, EVCE i is 2A to yield 2A from another charger. It is broadcasting a charge current request message requesting yield of the amount of current.

When the charging current request message is received from the EVCE i as described above, the EVCE j transmits a response message corresponding thereto to the EVCE i.

Here, the EVCE j may be currently being charged or uncharged, and the response message of the EVCE j may be a message including information on whether the device is charged, whether it is yieldable or not.

That is, the response message may include information indicating that the battery is being charged, yielding and yielding current information, and information indicating uncharging and yielding information if the charger is not being charged. This message contains information on the amount of current that can be yielded.

Here, the amount of current that can be yielded may be a marginal current amount excluding a supply current amount (which becomes the charging current supplied to the battery) determined by the user's charge request information from the regulated current amount in the case of the charger being charged. In the case of a charged charger, this can be the amount of current except for the minimum set current that it must own.

In the present invention, a charger that is currently being charged and has already yielded a current amount of another charger may be set to a charger that cannot yield a current amount, and may also be defined as a charger that does not receive a current amount (regulated charge amount> required charge amount). In the case where the surplus current amount excluding the supplyable current amount from the current amount is less than or equal to a preset value, the current amount may be set to a charger that cannot yield an amount of current.

Also, in a preferred embodiment, the charger that cannot yield current considering its charging situation (user charging request) generates a response message by indicating the amount of yieldable current as 0A in including and transmitting in the response message that the yield is impossible. And it can be set to send, wherein the EVCE i will be recognized as a charger that can not yield the current for the charger with a yield of current of 0A.

For example, each charger of EVCE j has a response message of (Y, 2A) when it is charging and has a yield of 2A, and when it is uncharged and has a yield of 2A (N, 2A) May be defined to transmit a response message of (Y, 0A) (charging and not yielding) or (N, 0A) (uncharging and not yielding) if concession is not possible.

Accordingly, the response messages of (Y, 2A), (N, 2A), (Y, 0A), and (N, 0A) may be messages indicating whether the device is charged, yielded, or yieldable current.

The charger of EVCE i receiving the response message from each charger of EVCE j determines whether or not to yield the current amount of EVCE j, and if the charger to be yielded and the amount of current to be yielded are determined, the charger corresponding to the response message includes information determined. Transfer to charger or any other charger.

At this time, the EVCE i determines a charger to be yielded according to a priority based on a predetermined rule. In a preferred embodiment, the charger which is presently charged and capable of yielding current is ranked first, and the charger which is currently uncharged is prioritized. It can be set to determine the charger to be yielded to.

That is, the yield current of the charger that is capable of yielding a current while being charged is preferentially taken, and when the yield current amount is more necessary, the yield current of the uncharged charger is taken as a later ranking.

This is considered that the charger which is currently uncharged is a charger that the user can connect to the vehicle and receive a new charge request, since the charger that is not charged may receive a user charge request later, and A charger that is uncharged may be required to return the yielded amount of current (ie, to omit a return process if possible later) if a new charge request from the charger is obtained while yielding current from the charger. In order to preferentially concede the current of the charger which is being charged while having a higher priority.

In addition, when the user's charging requirement of the EVCE i is not satisfied by only the amount of current yielded from one charger, the current amount may be yielded simultaneously from a plurality of EVCE j. In this case, the current amount of the charger that yields a large amount of current may be preferentially yielded. The rank can be set and vice versa.

Also, in determining the charger to be yielded and the amount of current to be yielded (the amount of current to be used), and then sending a response message to EVCE j, the value of the amount of current to be yielded from the charger only for the charger to be yielded to the EVCE j charger It is possible to have 2A) send out a defined response message, but more preferably it is possible to send a response message notifying the charger not to be yielded.

For example, for a charger that will not use yield current, it is possible to send a response message with a yield value defined as 0A, so that a charger receiving an OA response message may recognize that it does not yield current. Will be.

Meanwhile, when the charger to be yielded and the amount of current to be yielded are determined as described above, the EVCE i finally determines the supplyable current amount by adding the current amount to be yielded to the specified current amount, calculates charging prediction information from the determined supplyable current amount, and displays it on the display unit. do.

For example, if the user inputs 180 minutes of charging time as the charging request information through the display and input unit of EVCE i, the supplyable current amount when all the yield currents of all the chargers determined to be yielded through the above process is used. After the determination, the charging prediction information indicates that the battery of the vehicle connected to the EVCE i can be charged up to 80% SOC when the battery is charged for 180 minutes with the determined supply current.

Alternatively, some of the multiple charger EVCE j to be yielded can be charged between SOC 73 and 80% with some margin in consideration of the fact that some of the chargers may cease yielding during actual charging (such as when a new charger request is entered into the yielded charger). The charging prediction information is displayed.

After checking the charging prediction information, the user finally inputs the start of charging (for example, presses the 'start charging' button on the input part of the charger) so that the charging is performed at the final supplyable current amount. In the case of resetting, the above process is repeated again to recalculate the final supplyable current and then display the updated charging prediction information again.

In the EVCE i charger, when the supply current is finally determined, the process of charging the battery using the supply current as the charging current, as described above, the charger transmits the supply current to the BMS in the vehicle. Controlling the OBC to control the amount of current supplied to the battery to the supplyable current amount (slow charger), or a charger directly connected to the battery to control the charge current supplied to the battery to the supply amount of current (fast charger) ).

In this way, in the present invention, when the charger EVCE i inputted by the user's charge request does not meet the required current amount by the current specified current amount, the charging current request message is broadcast to all other chargers EVCE j, The charger (EVCE j) receiving the charge current request message determines the yieldable current amount reflecting its own charging status and responds, and the charger (EVCE i) receiving the yieldable current amount receives the charger and the yield current amount to yield. By determining and responding to each charger EVCE j, the final amount of supplyable current that can best accommodate the user's charge request is determined.

On the other hand, Figure 7 is a view showing the current amount return process after the end of the charge in the embodiment of the present invention, the specific charger receiving the current amount yield shows the process of returning the amount of current yielded after the end of the charge again.

Referring to FIG. 7, the message transmitted between the EVCE i having yielded the current amount and the EVCE j having yielded the current amount for returning the yield current amount after the end of charging of EVCE i is shown. The EVCE j of FIG. 7 is the EVCE j of FIG. 6. In contrast, the EVCE i represents a specific charger that yields a current.

As shown in FIG. 7, when the charging of the EVCE i is completed, the EVCE i initializes the amount of current (that is, the process of initializing all of the concessions before returning) to the EVCE j.

At this time, the EVCE i transmits a return notification message indicating that the yielded current amount is returned to the EVCE j. The return notification message including the amount of current information (the return current amount information) received by the EVCE i is transmitted to the EVCE j. Therefore, a confirmation message confirming that EVCE j is returned is transmitted to EVCE i.

As a result, both the EVCE i and the EVCE j recognize that the current amount setting is changed back to the state before the yield (the state of no yield) after the end of charging, and the current amount return process is terminated.

Next, FIG. 8 is a view showing a current amount return process during charging in the embodiment of the present invention, in which the charger receiving the yield of the current amount receives the current amount when receiving a request for return of the charger yielding the amount of current during its own charging. It shows the process of returning, and especially the message delivery status of the process of receiving the current amount back from the charger which yielded the current amount.

The EVCE j of FIG. 8 represents all other chargers except the EVCE i in the charger group constituting the charging network, and among the EVCE j, a charger currently yielding a current amount to the EVCE i.

During charging of EVCE i, if a new charge request is input to a charger that yields the current amount in EVCE j to EVCE i, the charger that yields the current amount in EVCE j sends a current return request message to return the yield current from EVCE i. Send to.

In the return process of FIG. 8, when new charging request information is input to a charger yielding a current amount during charging of the EVCE i, for example, a vehicle is connected to a specific charger (currently uncharged charger) that yielded a current amount to the EVCE i. When the user charge request information is input to the charger or the charge request information of the charger (currently charged charger) that yields the current amount is reset by the user, or after charging of the charger that yielded the current amount is over, the other vehicle cannot be charged. For example, when a new charge request information is input, such as when a state change occurs in a charger (which is one of EVCE j) yielding a current amount.

In the present invention, in the above case, the charger that yields the amount of current to the EVCE i is set to receive an unconditional return of the amount of current yielded to the EVCE i (hereinafter, referred to as 'conservation current amount'), or the required current amount is determined according to new charging request information. It can be set to return the yield current to the EVCE i only when the current available current amount (which becomes the current amount excluding the yield current amount from the specified current amount) in the state of yielding the current amount after the yield current is returned, First, the EVCE i is sent a current return request message.

The EVCE i receiving the current amount return request message performs the current amount yield process described in FIG. 6 again with respect to the remaining chargers in the charging network except for the charger that has sent the current amount return request message. Instead of the charger that was sent, the same amount of current concession will be carried out so that the EVCE i can receive a new yield from the other charger.

That is, the EVCE i finds another charger that can yield the current instead of the yield of the charger that has sent the current return request message, and receives a new yield from the charger, and sends the charge current request message as described above. The response message is transmitted and received.

Subsequently, when a new current yield process is performed, the supply current amount is reset in consideration of the newly yielded amount and the returned yield amount in the EVCE i, and then the battery charge current amount is adjusted so that the battery can be charged with the reset supply amount. Perform current amount adjustment.

Afterwards, a process of returning the amount of current actually returned, that is, a process of transmitting a return notification message by the EVCE i to the charger which sent the amount of return request message as described with reference to FIG. The process of transmitting the confirmation message to the EVCE i is performed in the same manner.

In addition, when the current amount return process is completed, the supply current amount considering the yield current amount returned from the charger that returns the yield current amount from the EVCE i is calculated, and then the charging prediction information is displayed based on the supply current amount. Charging the battery with the amount of supplyable current at the start of charging starts in the same way.

Also, even if the yield current amount is returned from the charger that has sent the amperage return request message (that is, the charger to return the yield current amount to the EVCE i), if the required current amount is larger than the specified current amount in the state where the yield current amount is returned, the charger is also different. The amount of current can be yielded from the charger, which is achieved through the process of yielding the current described above.

Next, FIG. 9 and FIG. 10 are diagrams collectively showing the charging process of the present invention described above, and the connection relationship between each charger and the integrated management server. 10 shows the process at the end of charging.

9 illustrates a configuration in which the representative charger of one of the entire charger groups constituting the charging network, that is, the EVCE 1 is configured to communicate directly with the integrated management server, wherein the EVCE 1 has all the information between the other charger and the integrated management server. It will play a role in relaying messages.

In FIG. 9, EVCE m represents a charger to which an actual electric vehicle (EV Car) is connected to charge the electric vehicle.

Referring to FIG. 9, first, user authentication (eg, an RFID method) or a charging fee payment process (associated with PG / VAN company) is performed in EVCE m. In this case, user authentication information is transmitted to the integrated management server through EVCE 1.

Subsequently, the integrated management server notifies EVCE m of the authentication result through EVCE 1, and when the integrated management server notifies authentication failure during the authentication process, charging of the electric vehicle of the user by EVCE m is terminated as it is.

On the other hand, if the authentication is successful, the user connects the vehicle to the EVCE m according to the guidance of the EVCE m (information information on the display unit), and communication between the EVCE m and the vehicle is required for battery information and delivers the battery information.

Subsequently, the user determines a charging method and inputs the above-described charging request information according to the guidance of the EVCE m (the guide information of the display unit), and the EVCE m calculates the required current amount based on the charging request information input by the user.

At this time, EVCE m may be a charger that does not yield a current amount to another charger or a charger that yields.

Therefore, after the required current amount is calculated, the EVCE m broadcasts a charge current request message to all other chargers when the calculated required current amount exceeds the specified current amount when the current amount is not yielding to other chargers. A series of current yield yield processes, namely, the current yield yield process described in FIG. 6, which yields the current amount from the specific charger EVCE i are calculated, and the supplyable current amount is calculated.

Alternatively, when the EVCE m is already yielding the amount of current to another charger EVEV i, after the series of current return procedures described in FIG. 8 are performed to yield the amount of current from the other charger, the amount of current from the other charger as needed. Proceed with the process of yielding the amount of current yielded, and calculates the amount of supplyable current.

Here, the EVCE m may be set to proceed with the current amount return process only when the calculated required current amount of EVCE m exceeds the current chargeable current amount (the available current amount obtained by subtracting the yield current amount from the prescribed current amount).

After the current yielding process or the current return process, the EVCE m calculates the charge prediction information from the calculated amount of supplyable current and displays it on the display unit. Is initiated.

In addition, when the user checks the charge prediction information and the user inputs the new charge request information, the user needs to recalculate the required current amount and reset the supplyable current amount (in this case, it is possible to supply after newly performing the current amount yield process). The amount of current can be reset), and the charging prediction information is updated and displayed again according to the reset supplyable current amount.

The necessary current amount calculation, current yield, supply current amount setting, and charging prediction information display process may be repeated until the user inputs new charging request information until the charging start is input, and finally, when the user enters the charging start, Charging begins.

When charging begins, the EVCE m sends a charge start message to the other charger and the integrated management server, and the integrated management server receives the charge start message through the EVCE 1 representative charger.

FIG. 10 is a diagram illustrating a process of returning a current amount after charging is completed. In addition to the contents described with reference to FIG. 7, communication between the vehicle and EVCE m is performed after charging is completed, and EVCE m transmits a charging end message to another charger, and EVCE 1 Demonstrates the delivery of end-of-charge messages from the EVCE m to the integrated management server.

In FIG. 10, when the amount of power input after the end of charging is different from the amount of power contracted previously, the billing process may be performed again.

FIG. 11 is a diagram illustrating a process of returning the amount of current during charging described in FIG. 8 and a connection relationship between each charger and the integrated management server. While the electric vehicle is being charged at the ECVE m, the EVCE j gives the yield current amount to the EVCE m. When a current return request message is sent for return, EVCE m broadcasts a charge current request message requesting yield to other chargers (EVCE 1, EVCE l, etc.), then EVCE 1 or EVCE i, or Proceed with a series of current concessions, a new yield of current from another charger, and calculates the supplyable current again.

After the supplyable current amount is recalculated in the EVCE m, the EVCE m requests the BMS of the electric vehicle to adjust the amount of electric power so that the charged current of the reproducible supply current can be supplied to the battery of the electric vehicle so that the battery can be charged. Accordingly, the BMS adjusts the amount of current so that the battery can be charged with the supplyable current amount recalculated through OBC control.

In this case, the recalculated supplyable current amount is a value calculated on the premise that the EVCE m being charged returns the current amount yielded to EVCE j, and includes a new yield current amount if the current amount is newly yielded. According to the calculated amount of supply current, the BMS adjusts the amount of charge current supplied to the battery through OBC control (momentary interruption and resumption of charge may occur). When receiving, the process of FIG. 7, that is, the EVCE m sends a return notification message and then a current amount return process of receiving a confirmation message from EVCE j is performed.

Therefore, instead of the yield current of EVCE j requesting the return of the current amount, the EVCE m may receive the current amount from the new charger and continue to charge the battery of the electric vehicle.

As described above, the charging equipment and the charging control method according to the present invention have been described in detail, and in the present invention, when a specific charger does not meet the required charging amount corresponding to the user's charging demand, the current amount can be obtained from another charger through the charging network. A yield yield process is performed, which has the advantage of enabling faster and more efficient charging.

The embodiments of the present invention have been described in detail above, but the scope of the present invention is not limited to the above-described embodiments, and various modifications of those skilled in the art using the basic concepts of the present invention defined in the following claims and Improved forms are also included in the scope of the present invention.

1: vehicle (electric vehicle) 2: BMS
3: OBC 4: battery
8: distribution box 9: power line
10a: slow charger (AC charger) 10b: rapid charger (DC charger)
11 control unit 12 communication module
13: PLC modem 14: breaker
15: storage unit 16: input unit
17: display unit 20: integrated management server
21 input unit 22 display unit
23: database 30: electronic payment agent (PG company / VAN company) server
40: mobile communication terminal 50: user PC

Claims (29)

Includes a plurality of chargers for charging the battery of the electrical device according to the user's charging needs,
Each charger is a communication module for communication between chargers, and a signal to be transmitted to other chargers through the communication module and a charge supplied to a battery during charging so that the plurality of chargers can be communicatively connected. It includes a control unit for generating and outputting a signal for controlling the amount of current,
The controller of the charger
Calculate the amount of current required to charge the battery according to the charging request information input by the user, check the charger with the available current amount by communicating with other chargers, and then yield the current amount that is yielded from other chargers with the available current amount. And performing a process and determining the amount of supplyable current for charging the battery by reflecting the amount of current received from the other charger.
The method according to claim 1,
The control unit of the charger is characterized in that the charging process, if the required current amount exceeds the set current amount yields the current amount yield process.
The method according to claim 1,
In the process of confirming the charger having a margin of the available current amount,
The controller of the charger sends a charge current request message for yielding the amount of current to all other chargers connected by the communication network,
The controller of the other charger receiving the charge current request message sends a response message.
And a controller of the charger which has sent the charging current request message to select another charger to receive the amount of current based on a predetermined priority rule from the received response message.
The method according to claim 3,
The response message is a charging facility, characterized in that the message including the information on whether the amount of current and the amount of current can be yielded.
The method according to claim 3,
The control unit of the charger receiving the response message of the other charger, the charging facility, characterized in that for sending the response message including the determined information after determining the charger to receive the current amount and the current to be yielded to the other charger.
The method according to claim 3,
The controller of the charger that sends the charge current request message selects another charger to receive the current amount, and then adds the current amount to be yielded from the selected charger by adding the set current amount of the charger that sent the charge current request message to supply the current amount. Charging equipment, characterized in that determined by.
The method according to claim 1,
The controller of the charger receiving the current amount proceeds to return the current amount to return the amount of current yielded after the end of charging.
In the current amount return process,
A return notification message indicating that the controller of the charger yielding the current amount returns the yielded current amount is sent to the other charger that yielded the current amount,
And a control unit of the other charger that has received the return notification message sends a confirmation message to the charger that has sent the return notification message.
The method according to claim 1,
During the charging of the charger yielding the current amount, the controller of the charger yielding the current amount returns a current amount return process in which the current yield value returned by the charger yielding the current amount is returned from the charger yielding the current amount when the charging request information is input by the user. Charging facility characterized by proceeding.
The method according to claim 8,
In the process of returning the amount of current during the charging,
The controller of the charger that yielded the current amount sends a current amount return request message to return the amount of current yielded to the charger that received the amount of current,
Sending a return notification message indicating that the control unit of the charger receiving the current amount return request message returns the amount of current yielded to the charger that sent the current amount return request message,
And a control unit of the charger that has received the return notification message sends a confirmation message to the charger that has sent the return notification message.
The method according to claim 9,
The controller of the charger receiving the current amount return request message performs the current amount yield process again with respect to the chargers other than the charger that has sent the current amount return request message, and then resets the supplyable current amount reflecting the newly yielded current amount and resets the supply. Charging facility, characterized in that for adjusting the amount of charge current so as to charge the battery to the amount of possible current.
The method according to claim 1,
The control unit of the charger is characterized in that for controlling the charging of the battery of the electric device to the determined amount of supplyable current.
In the charging control method of the charging facility in which a plurality of chargers for charging the battery of the electric device according to the user's charge request is connected to each other through a communication module to form a communication network,
The charger that receives the user's charge request information
Calculating an amount of current required to charge the battery according to charging request information of the user;
Confirming a charger having a margin of available current amount through communication with another charger, and performing a current yield yield process that yields a current amount from another charger having a margin of available current amount; And
Determining a supplyable current amount for charging the battery by reflecting a current amount yielded from the other charger;
Charging control method of the charging facility using a communication network between the charger, characterized in that proceeding.
The method of claim 12,
The charger receiving the user's charge request information, the charge control method of the charging facility using a communication network between the charger, characterized in that for proceeding the current amount yield process when the required current amount exceeds the set current amount.
The method of claim 12,
In the process of confirming the charger having a margin of the available current amount,
The charger inputs the charge request information of the user sends a charge current request message for yielding the current amount to all other chargers connected by the communication network,
In response, the other charger receiving the charge current request message sends a response message.
And a charger which sends the charge current request message selects another charger to receive a current amount based on a predetermined priority rule from the received response message.
The method according to claim 14,
The response message is a charging control method of a charging facility using a communication network between the charger, characterized in that the message containing the information on whether the amount of current and the amount of yieldable current.
The method according to claim 15,
The charger for sending a response message is a charging control method for a charging facility using a communication network between the charger, characterized in that if the current amount of the current yield is not possible to send a response message of 0A.
The method according to claim 15,
The response message may further include information indicating whether the corresponding charger that receives the charging current request message and sends a response message indicates whether the charger that has sent the charging current request message is currently charging the charger from the received response message. A charging control method for a charging facility using a communication network between chargers, characterized in that it is determined to give priority to the charger in the state of charge to another charger.
The method according to claim 15,
The yieldable current amount is a margin current amount excluding the charging current amount of the currently charged charger being supplied to the battery from the set current amount in the case of the charger currently being charged, and the minimum amount that must be owned by the uncharged charger in the case of the uncharged charger. A charging control method for a charging facility using a communication network between chargers, characterized in that the remaining current amount except the set current amount.
The method according to claim 14,
The charger receiving the response message of the other charger determines the charger to receive the current amount and the amount of current to be received, and then sends a response message including the determined information to the other charger. Charge control method.
The method of claim 19,
The charging control method of the charging facility using the communication network between the charger, characterized in that for the charger to be yielded and the charger that has determined the amount of current to be yielded will send a response message defining a current amount to be yielded as 0A.
The method according to claim 14,
After the charger that has sent the charge current request message selects another charger to receive the current amount, the charger may determine the supplyable current amount by adding the current amount to be yielded from the selected charger with the set current amount of the charger that sent the charge current request message. Charging control method of a charging facility using a communication network between the charger, characterized in that.
23. The method of claim 21,
The charger sending the charge current request message calculates the charge prediction information based on the determined supplyable current amount and the charge request information of the user and displays the charge prediction information on the display unit. Way.
The method according to claim 14,
The charge current request message is a charge control method of a charging facility using a communication network between the charger, characterized in that it includes information on the amount of current to be yielded along with the yield request.
The method of claim 12,
The charger receiving the current amount proceeds to return the amount of current to return the amount of current yielded after the end of charging.
In the current amount return process,
Send a return notification message to the other charger that yielded the current, indicating that the charger yielding the current returns the current,
And charging a charging facility using a communication network between chargers, wherein the other charger receiving the return notification message sends a confirmation message to the charger that has sent the return notification message.
The method of claim 12,
During the charging of the charger yielding the current amount, the charger yielding the current amount proceeds to return the amount of current in which the charger yielding the current amount is returned from the charger receiving the current amount when the charging request information is input by the user. A charging control method for a charging facility using a communication network between chargers, characterized in that.
26. The method of claim 25,
In the process of returning the amount of current during the charging,
The charger that yields the current amount sends a request message for requesting the return of the current amount to the charger which received the amount of current,
Sending a return notification message to the charger that has sent the amperage return request message indicating that the charger receiving the amperage return request message returns the yielded current amount;
And a charger for receiving the return notification message sends a confirmation message to the charger that has sent the return notification message.
27. The method of claim 26,
After receiving the current amount request message, the charger performs the current amount yield process again with respect to the chargers other than the charger that sent the current amount request message, resets the supply current amount reflecting the newly yielded current amount, and resets the amount of supply current that has been reset. Charging control method of a charging facility using a communication network between the charger, characterized in that for adjusting the charging current to perform the battery charging.
26. The method of claim 25,
The charger yielding the current amount proceeds to return the current amount when the available current amount in the state yielding the current amount does not satisfy the required current amount according to the user's charge request information, and the charger yielding the current amount is returned. Charging control method of a charging facility using a communication network between the charger, characterized in that.
The method of claim 12,
The charger having yielded the current amount calculates the charge prediction information based on the determined supply current amount and the charging request information of the user and displays the charge prediction information on the display unit. Is controlled to charge the battery, and when the user's new charging request information is input, the charging prediction is performed based on the calculation of the required current amount, the process of yielding the current, the determination of the supply current amount, and the determined supply current amount and the new charging request information of the user. A method of controlling charging of a charging facility using a communication network between chargers, comprising repeating a process of calculating information and displaying the information on a display unit.

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