JP2015525552A - Multi-function charger for electric vehicle for DC distribution network using large capacity DC-DC converter - Google Patents

Abstract

The present invention relates to a multi-function charging device for an electric vehicle for a DC power distribution network using a large-capacity DC-DC converter, and a large-capacity DC-DC converter is supplied with electric power transmitted from a DC power supply bus. In order to stably charge the electric vehicle, a number of charging connectors are pulled out. Conversely, when the electric power required for the operation of the railway vehicle is insufficient, the electric vehicle's electric power is converted into railway electric power through the control of the central remote management system. The present invention relates to a multi-function charging device for an electric vehicle for a large-capacity DC power distribution network that can be used and can display a charging-related information by attaching a small panel to each charging connector connected to the electric vehicle.

Description

  The present invention relates to a multi-function charging device for an electric vehicle for a DC distribution network using a large-capacity DC-DC converter that can charge a large number of electric vehicles using a single DC / DC converter in the charging device for an electric vehicle. More specifically, the present invention can draw a power supply line from a DC power supply bus so that an electric vehicle can be quickly charged, and charge a large number of vehicles from one high-efficiency large-capacity DC-DC converter in both directions. More particularly, the present invention relates to a multifunctional charging device for an electric vehicle for a DC power distribution network that can re-use electric power of an EV battery connected to a charging infrastructure for system power when the power of the system is insufficient.

In general, automobiles use gasoline and diesel as fuel. Gasoline and diesel not only generate harmful gases during combustion and cause air pollution, but there is not much crude oil that makes gasoline and diesel on the earth. Therefore, the development of alternative energy in each industrial field has been rushed, and the development of electric vehicles has been completed as a solution.
An electric vehicle must be charged with electricity necessary for operation. The method of charging electricity can be classified into a slow charging station and a quick charger.

The charging station, which is a slow charging method, is a method in which AC 220V or 380V electric energy supplied by a commercial AC power system is converted into a DC power source using a charger mounted inside the vehicle and then charged. is there.
On the other hand, the quick charging method is necessary for an electric vehicle from a high-voltage DC power source through an AC-DC converter that does not install a charger inside the vehicle, but changes the AC power source to a DC power source by the charger itself that charges the vehicle. This is a method of outputting a DC voltage suitable for a charging power source of a storage battery of an electric vehicle from a charger using a DC-DC converter that depressurizes to a direct voltage.

Therefore, it is possible to supply a large current and charge the storage battery in a short time as compared with a charger mounted inside the vehicle, but a DC-DC converter is provided inside the charger, which is bulky and heavy. There is a problem.
In addition, normally, when using domestic electricity for charging storage batteries in electric vehicles, a slow charging method is used, but this takes a long time, and the travel distance that can be moved by one charging of the storage battery is long. The battery must be charged well due to limitations.

In addition, with the generalization of electric vehicles, the need for a storage battery charging station such as an existing gas station has increased.
In building such a charging station, in order to charge a large number of electric vehicles in large areas such as apartments, apartment housing parking lots, company building parking lots and public facilities parking lots in the existing city center A large amount of power is required to charge the electric vehicle. In order to obtain such power, by the construction of additional transmission and distribution lines, the management equipment for managing and controlling the power supply, and the securing of a place for the construction of a large number of charging stations, There are inefficiencies in charging infrastructure construction time and costs.

  In order to solve the above problems, a large amount of power is stably supplied from the power supply system of DC electric railways that are already stably installed and operated nationwide, and charging power is supplied by the central remote monitoring and control system. In order to provide a system that can measure the amount of charging power used by protecting, controlling, and monitoring the system for supply, the “DC Electric Railway Power Supply Network” filed by the Korea Railway Technology Research Institute, the applicant of the present application An electric vehicle charging power supply system used (see Patent Document 1) "was presented.

  FIG. 1 is an overall block diagram of an electric vehicle charging power supply system using a conventional DC electric railway power supply network. FIG. 2 is a diagram illustrating a configuration of a power supply system for charging an electric vehicle using a DC power supply system according to an embodiment of the present invention.

  As shown in FIGS. 1 and 2, the electric vehicle is supplied with power from a 1.500 V DC power supply bus. Since the magnitude of the voltage at the DC power supply bus changes as needed depending on the amount of electric power used by the railway vehicle, the power supply unit 10 is connected to the DC-DC converter in order to keep the DC voltage for rapid charging constant. The converter output voltage control module 11 that controls the output voltage, the converter output amount measurement module 12 that measures the output amount of the DC-DC converter in order to measure the amount of charging power, and the railway due to a temporary increase in the power supply charge amount, etc. A switching module 13 for controlling on / off of the DC-DC converter in preparation for the case where the power usage required for the operation of the vehicle is affected, and the railway vehicle due to an abnormality of the DC-DC converter or a failure in the quick charge portion Protective equipment such as DC high-speed circuit breakers and protective relays on the primary side of the DC-DC converter And a Yuru 14.

  The charging unit 20 is an interface that links an electric vehicle and a power system so that a DC voltage power source that is decompressed so as to be compatible with the electric vehicle can be supplied from the power supply unit 10 through a DC-DC converter and supplied to the vehicle battery. The module 21, the input module 22 that receives the command input corresponding to the requirement from the user, and the battery state in the vehicle connected through the interface module 21, the battery state is maintained so that safe charging is possible. Monitoring module 23 for monitoring and displaying charging information, and identifying the specific information of the vehicle connected through the interface module 21 and exchanging information with the vehicle through wired or wireless communication depending on the situation. Vehicle identification module that identifies vehicles so that there are no errors in use It provided with Lumpur 24, a charging collection module 25 for settlement by charges already set on the basis of the charging information transmitted from the monitoring module 23.

  At this time, the charging unit 20 is preferably a quick charger, for example. Compared to general vehicle-mounted chargers, this is possible to control charging through the supply of a large current, and is relatively large compared to vehicle-mounted chargers because it enables battery charging in a relatively short time. The charging system has a power capacity, is bulky and has a heavy weight, and has a charging system that supplies direct current from a device for power conversion to a vehicle battery.

Here, the charging information includes instantaneous electric energy supplied to the vehicle, cumulative electric energy, charging state and charging time, etc., and utilizes the DC power supply for railway vehicles and the AC power supply for electric supply installed in the railway station building. A system for supplying a power supply for quick charging and a power supply for slow charging is provided.
The power supply unit 10 and the charging unit 20 are remotely connected to each other through a network to be remotely controlled, and a remote control terminal 30 is provided for monitoring and acquiring charging information in real time.

  However, the electric vehicle charging power supply system described above is a one-to-one charging infrastructure for charging one electric vehicle per DC-DC converter, and the number of electric vehicles charged increases as the number of electric vehicles increases. -There is a problem in efficiency and cost because an additional DC converter must be installed.

  In addition, since each DC-DC converter, the module in the power supply unit, and the charging unit must be separately controlled and managed by the remote control terminal 30, the control and management algorithm becomes very complicated. There is.

Korean Patent Publication No. 2011-0112935

  The present invention has been devised in order to solve the above-described problems, and power transmitted from a DC power supply bus is supplied to one large-capacity DC-DC converter to stably charge a large number of electric vehicles. To pull out a large number of charging connectors, and if the power required for the operation of the railway vehicle is insufficient, the electric vehicle power can be used as railway power through the control of the central remote management system. It is an object of the present invention to provide a multi-function charging device for an electric vehicle for a DC power distribution network capable of displaying charging-related information by attaching a small panel to each charging connector to be connected.

  In order to achieve the above-mentioned purpose, the multifunctional charging device of the electric vehicle for the DC distribution network utilizing the large-capacity DC-DC converter measures the amount of power supplied and the amount of power consumed, and provides stable power supply in both directions. A power control unit that performs charging, a general management control unit that determines whether charging is possible from input by a user, monitors and outputs charging information for each charging connector, calculates and charges a charge, and an electric railway vehicle One DC-DC converter capable of converting high-voltage DC power to a plurality of low-voltage DC power and vice versa, BMS for collecting battery information of the electric vehicle and preventing charging overvoltage and overcurrent, An output unit for outputting the amount of power and the charging information for each charging connector; a charge imposing unit for using each charging connector; and a charge imposing unit for paying the usage fee Obtaining charging device, and a plurality of the charging connector pulled out from the charging device.

  The charging connector controls a device in the charging connector by a wired charger communication module that receives information for controlling the charging connector from the general management control unit, and a control signal transmitted from the charger communication module A charging connector control module, a display module that outputs the charging information to a user, and a payment input module for charging fee payment are provided.

  According to the multi-function charging device for an electric vehicle for a DC power distribution network using a large-capacity DC-DC converter according to the present invention, when charging a large number of electric vehicles, the conventional DC-DC converter is used for each electric vehicle. In the present invention, a large number of charging connectors are drawn out from one large-capacity DC-DC converter and used to reduce the installation space for the charging facility, which is efficient for space utilization. Because it is a single DC-DC converter, it is possible to reduce the cost of facility installation, and it is possible to convert to various DC voltages required for quick charging in each electric vehicle, and inside each quick charger It eliminates the various power converters provided, converts and controls power in a centralized manner, and is effective in operating and controlling power supply. Parts is an advantage to be simplified.

  Moreover, when the power of the railway vehicle is insufficient through the power control unit, it is possible to receive power supply from the electric power charged in the electric vehicle connected to the charging infrastructure, and the peak adjustment of the electric power of the railway vehicle is easy. There is an advantage that can be comprehensively monitored and controlled from a central remote management system.

It is a block diagram regarding the electric power supply system for charge of the electric vehicle using the direct current power feeding system which concerns on a prior art. It is a block diagram of the electric power supply system for charge of the electric vehicle using the DC power feeding system which concerns on a prior art. It is a block diagram regarding the multifunctional charging device of the electric vehicle using the large capacity direct current-direct current converter which concerns on one Example of this invention. 1 is a block diagram of a multifunctional charging device for an electric vehicle using a large-capacity DC-DC converter according to an embodiment of the present invention. It is a block diagram of the multifunctional charging connector which concerns on one Example of this invention. It is a usage illustration figure of the multifunctional charging connector which concerns on one Example of this invention. FIG. 4 is a usage example view of a charging information display according to an embodiment of the present invention.

Hereinafter, the configuration and operation of an embodiment of a multi-function charging device for an electric vehicle for a DC power distribution network using a large-capacity DC-DC converter according to the present invention will be described in detail with reference to the accompanying drawings.
As shown in FIG. 3, the multi-function charging device for an electric vehicle for a DC power distribution network according to an embodiment of the present invention includes a charging device 100 and a plurality of charging connectors 170.

The power supply device that supplies power to the charging device 100 supplies high-voltage DC power as a power supply system for a DC electric railway that supplies power necessary for the operation of the electric railway vehicle under the control of the central remote management system.
The power supply device of the urban railway that operates in the city center supplies power of 22.900V or 6.600V to each electrical room in order to supply power to signal facilities such as station buildings and tunnels, lighting, air conditioning and ventilation. In the electric room, the electric power is supplied after being converted to 380V or 220V, which is a voltage for general electric equipment. Further, in preparation for the case where power supply to the electric room is interrupted, an extended distribution line that can receive power supply from a neighboring electric room is configured, and power supply can be received regardless of a power failure.

  In general, a power supply device draws a power supply line from a DC power supply bus provided along a track, converts it to a DC voltage, and supplies power to an electric railway vehicle. Here, the magnitude of the voltage of the DC power supply bus can be changed as needed according to the amount of electric power used by the electric vehicle.

The charging device 100 converts the power transmitted from the power supply device into the power necessary for charging the electric vehicle and charges a large number of electric vehicles so that the power control unit 110, the general management control unit 120, the DC-DC converter can be charged. 130, a BMS (Battery Management System) 140, an output unit 150, and a charge imposing unit 160.
As shown in FIG. 4, the power control unit 110 includes a measurement module 111 for measuring the amount of power, a signal generation module 112 for stable power supply in both directions, and a safe operation of the electric railway vehicle. And a protection equipment module 113.

  The measurement module 111 is installed on the primary side of the DC-DC converter 130 and measures the amount of power supplied to the charging device 100 from a power supply device that supplies high-voltage DC power on the station building and the railway line. The amount of power that is installed on the secondary side of 130 and consumed by the charging device 100 is measured.

  The signal generation module 112 sends a G2V (grid to vehicle) signal that allows charging when there is a margin for charging the electric vehicle from the amount of power measured by the measurement module 111. If there is no room, a V2G (Vehicle to Grid) signal is generated and transmitted to the general management control unit 120 that manages the charging device.

  The protective equipment module 113 is installed on the primary side of the DC-DC converter 130 to cope with an emergency situation of the operation of the electric railway vehicle that can be generated from a temporary increase in the charge amount or an overpower supply due to an abnormality of the charging device 100. In this way, a DC high-speed circuit breaker and a protective relay for on / off control of power supply are provided.

  The comprehensive management control unit 120 includes an input module 121 that receives a charge request for an electric vehicle from a user, a control module 122 that controls each module in the comprehensive management control unit 120 according to a signal transmitted from the signal generation module 112, A monitoring module 123 for monitoring charging information for each charging connector, an output module 124 for transmitting only the information displayed on the output unit 150 from information transmitted from the monitoring module 123, and charging information transmitted from the monitoring module 123. And a charge collection module 125 for calculating a charge based on a charge set based on the charge.

  When the control module 122 receives a charging request from the input module 121, the control module 122 can check whether the G2V signal is transmitted from the signal generation module 112 and charge the electric vehicle from the power supply device. In this way, the power network control is performed so that the power transmission signal to the DC-DC converter 130 is turned on by the power supply device, and the power transmission signal to the power supply device is turned off by the DC-DC converter 130 to control the power transmission. -Supply power to the DC converter 130. Through the information for each charging connector 170 transmitted from the monitoring module 123, whether or not it is currently used and the amount of power used for charging are controlled.

  During charging, the information transmitted from the monitoring module 123 is transmitted to the output module 124, and when charging is completed, the charge collection module 125 is driven.

  Conversely, when a V2G signal is received from the signal generation module 112, a power transmission signal to the power supply device by the DC-DC converter 130 through power grid control so that the power charged in the electric vehicle can be transmitted to the power supply device. Is turned on, and the power supply device turns off the power transmission signal to the DC-DC converter 130 to supply power to the power supply device.

  Further, the protection equipment module 113 of the power control unit 100 provided on the primary side of the DC-DC converter 130 is controlled so that the operation of the electric railway vehicle is not hindered due to an abnormality of the DC-DC converter 130 or a failure in the BMS 140.

  The DC-DC converter 130 is a large-capacity DC-DC converter, and its capacity is much larger than that of a conventional one-to-one type charging system. It is a capacity that can accommodate a plurality of vehicles and is usually based on about 10 vehicles. The capacity is about 500 kW, and the capacity can be increased depending on the presence or absence of technology. The DC-DC converter 130 converts the power of the DC power supply bus supplied to the railway vehicle into a low voltage level that can be charged to the battery of the electric vehicle by the charging device.

  The BMS 140 includes an information scanning module 141 that scans information regarding the voltage value and current value of the battery that is currently being charged, a charge control module 142 that controls the voltage value and current value to be actually charged, and the battery of the electric vehicle being charged. A protection and blocking module 143 that can determine the overvoltage and overcurrent that can be generated and block the charging connector 170 is provided.

  The information scanning module 141 grasps battery information of the electric vehicle. That is, the DC-DC converter 130 changes the high-voltage DC voltage to a low-voltage DC voltage for charging. However, depending on the type of each battery used in an electric vehicle, the voltage value and the current value may differ, and there is a problem that the battery is damaged unless a voltage and a current corresponding to this are supplied. Therefore, in order to solve the above problem, the information scanning module 141 grasps information about the battery prior to charging.

The charge control module 142 performs control to convert the voltage and current to match the battery voltage and current obtained from the information scan module 141.
The output unit 150 includes an overall output module 151 that receives and displays charging information by charging from the general management control unit 120, and a connector-specific output module 152 that displays charging information for each connector.

The overall output module 151 outputs the amount of power supplied from the power control unit 110, the accumulated charge amount, accumulated charging information, and the like to a display attached to the charging apparatus 100.
The connector-specific output module 152 outputs the charging voltage, charging current, charging power, charging time, charging fee, and the like for each electric vehicle from the general management control unit 120 to a display attached to the charging device 130, and outputs it to each charging connector 170. The data is transmitted to the attached display module 173.

The charge imposing unit 160 is divided into a payment means selection module 161 that performs a determination regarding the payment means transmitted from the payment input module 174 of the charging connector 170, and the control module 122 classifies each charging connector 170 according to the selected payment means. A settlement module 162 that settles a usage fee according to the calculated billing information.
It is also desirable to make a payment by providing a payment input module on one side of the charging device 100.

  As shown in FIG. 5, the charging connector 170 is charged by a charger communication module 171 that receives information for controlling each charging connector 170 from the general management control unit 120 and a control signal transmitted from the charger communication module 171. A charging connector control module 172 that controls the device in the connector, a display module 173 that outputs charging information to the user, and a payment input module 174 for charging fee payment.

  The charger communication module 171 is in charge of a communication function for transmitting information between the general management control unit 120 and the charging connector control module 172 in the charging connector 170. Usually, the charging device 100 and the charging connector 170 communicate with each other in a wired manner, but can also communicate in a wireless manner.

The charging connector control module 172 determines whether or not the charging transmitted from the charger communication module 171 is necessary, and interrupts the charging in response to the request for blocking the charging transmitted from the protection and blocking module 143 of the BMS 140.
Then, the charging and billing information transmitted from the output unit 150 is transmitted to the display module 173, and the settlement method transmitted from the settlement input module 174 is transmitted to the charger communication module 171.

The display module 173 displays a charging voltage, a charging current, a charging power, a charging time, a charging fee, a charging progress item, and the like as information relating to the charging transmitted from the charging connector control module 172. To display the charges.
And a display means like a simple charge condition indicator lamp can be utilized so that a charge condition can be checked more easily.

  The payment input module 174 provides a payment input means on the surface of the charging connector 170 so that the user can easily pay. The payment input means uses a non-contact card payment method to receive input of user payment information by approaching a card or mobile phone, and transmits the payment to the charge imposing unit 160 through the charger communication module 171 for payment.

The charging connector control module 172 can also make a payment by using the charging fee transmitted from the payment input module 174 to the fee charging unit 160.
In the present specification, a preferred embodiment of the multi-function charging device for an electric vehicle for a DC power distribution network using the large-capacity DC-DC converter according to the present invention has been described, but the present invention is not limited thereto. . The present invention can be variously modified and implemented within the scope of the claims and attached drawings, and this also falls within the scope of the right of the present invention.

DESCRIPTION OF SYMBOLS 100 Charging apparatus 110 Electric power control part 111 Measurement module 112 Signal generation module 113 Protection equipment module 120 Total management control part 121 Input module 122 Control module 123 Monitoring module 124 Output module 125 Charge collection module 130 DC-DC converter 140 BMS
141 Information Scan Module 142 Charging Control Module 143 Protection and Blocking Module 150 Output Unit 151 Overall Output Module 152 Connector-Specific Output Module 160 Charge Imposing Unit 161 Payment Means Selection Module 162 Payment Module 170 Charging Connector 171 Charger Communication Module 172 Charging Connector Control Module 173 Display module 174 Settlement input module

Claims (15)

In the multi-function charger for electric vehicles,
A power control unit that measures the amount of power supplied and consumed, and performs stable power supply in both directions;
A comprehensive management control unit that determines whether charging is possible from input by the user, monitors and outputs charging information for each charging connector, calculates a charge, and charges,
One DC-DC converter capable of converting high voltage DC power for electric railway vehicles into a plurality of low voltage DC power and vice versa;
BMS for collecting battery information of the electric vehicle and preventing charging overvoltage and overcurrent;
An output unit for outputting the amount of power and the charging information for each of the charging connectors;
A charging device comprising a charge levy by use of each of the charging connectors and a charge levying unit that settles the use fee, and a multi-function charging device for an electric vehicle comprising a plurality of the charging connectors drawn from the charging device.   The charging connector controls a device in the charging connector by a wired charger communication module that receives information for controlling the charging connector from the general management control unit, and a control signal transmitted from the charger communication module The multi-function charging device for an electric vehicle according to claim 1, comprising a charging connector control module, a display module that outputs the charging information to a user, and a payment input module for charging fee payment.   The power control unit includes a DC high-speed circuit breaker, a protective relay, and a signal generation module configured to supply power from the charging device to the power supply device for safe operation of the electric railway vehicle. Or the multifunctional charging device of the electric vehicle of Claim 2.   The multi-function charging device for an electric vehicle according to claim 1, wherein the charge imposition unit performs settlement by providing a settlement input module on one side of the charging device.   The multi-function charging device for an electric vehicle according to claim 3, wherein the charge imposing unit performs settlement by providing a settlement input module on one side of the charging device.   The multifunction charger for an electric vehicle according to claim 2 or 3, wherein the charger communication module communicates with the charger in a wireless communication manner.   The multifunction charger for an electric vehicle according to claim 4, wherein the charger communication module communicates with the charger in a wireless communication manner.   The multifunction charger for an electric vehicle according to claim 5, wherein the charger communication module communicates with the charger in a wireless communication manner.   The multi-function charging device for an electric vehicle according to claim 2, wherein the charging connector control module performs a payment using a charging fee transmitted from the payment input module to the fee charging unit.   The multifunction charging device for an electric vehicle according to claim 3, wherein the charging connector control module makes a payment using a charging fee transmitted from the payment input module to the fee charging unit.   The multi-function charging device for an electric vehicle according to claim 4, wherein the charging connector control module makes a payment using a charging fee transmitted from the payment input module to the fee levying unit.   6. The multi-function charging apparatus for an electric vehicle according to claim 5, wherein the charging connector control module makes a payment using a charging fee transmitted from the payment input module to the fee charging unit.   The multi-function charging device for an electric vehicle according to claim 6, wherein the charging connector control module makes a payment using a charging fee transmitted from the payment input module to the fee levying unit.   The multifunction charging device for an electric vehicle according to claim 7, wherein the charging connector control module performs payment using a charging fee transmitted from the payment input module to the fee charging unit. The multi-function charging apparatus for an electric vehicle according to claim 8, wherein the charging connector control module performs a payment using a charging fee transmitted from the payment input module to the fee charging unit.

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