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WO2019098646A1 - Multi charger for electric vehicle using both combo 1 mode and combo 2 mode and method thereof - Google Patents

Multi charger for electric vehicle using both combo 1 mode and combo 2 mode and method thereof Download PDF

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Publication number
WO2019098646A1
WO2019098646A1 PCT/KR2018/013826 KR2018013826W WO2019098646A1 WO 2019098646 A1 WO2019098646 A1 WO 2019098646A1 KR 2018013826 W KR2018013826 W KR 2018013826W WO 2019098646 A1 WO2019098646 A1 WO 2019098646A1
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WIPO (PCT)
Prior art keywords
electric vehicle
combo
mode
charging
electric
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Ceased
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PCT/KR2018/013826
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French (fr)
Inventor
Kyoungjin Kim
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Renault Korea Co Ltd
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Renault Samsung Motors Inc
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Publication of WO2019098646A1 publication Critical patent/WO2019098646A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
    • B60L53/14—Conductive energy transfer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/30—Constructional details of charging stations
    • B60L53/305—Communication interfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/30—Constructional details of charging stations
    • B60L53/31—Charging columns specially adapted for electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/60—Monitoring or controlling charging stations
    • B60L53/65—Monitoring or controlling charging stations involving identification of vehicles or their battery types
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/60—Monitoring or controlling charging stations
    • B60L53/66—Data transfer between charging stations and vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/60—Monitoring or controlling charging stations
    • B60L53/66—Data transfer between charging stations and vehicles
    • B60L53/665—Methods related to measuring, billing or payment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2210/00—Converter types
    • B60L2210/30—AC to DC converters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2250/00—Driver interactions
    • B60L2250/16—Driver interactions by display
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/90—Vehicles comprising electric prime movers
    • B60Y2200/91—Electric vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/12—Electric charging stations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/16—Information or communication technologies improving the operation of electric vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/16—Information or communication technologies improving the operation of electric vehicles
    • Y02T90/167—Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of electric vehicles [EV] or hybrid vehicles [HEV]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S30/00—Systems supporting specific end-user applications in the sector of transportation
    • Y04S30/10—Systems supporting the interoperability of electric or hybrid vehicles
    • Y04S30/14—Details associated with the interoperability, e.g. vehicle recognition, authentication, identification or billing

Definitions

  • the present invention relates to a charger for an electric vehicle and a control method thereof, and more particularly to a charger for simultaneously charging two electric vehicles and a control method thereof.
  • an electric vehicle charger supplies electric power in the form of AC or DC to an electric vehicle.
  • a charger supplies electric power in AC form, single-phase 220V AC, such as household electricity, or three-phase 380V AC is provided and as a result, the charging terminal of an electric vehicle also changes.
  • the fast chargers that supply DC include a Combo 1 mode, a Combo 2 mode, and a CHAdeMO mode, and use different charging terminals depending on each mode.
  • Combo 1 mode is mainly used in the United States
  • Combo 2 mode is mainly used in Europe
  • CHAdeMO mode is used mainly in Japan.
  • the single-phase 220V electric power is mainly used in household chargers
  • the fast charger using three-phase 380V AC or DC is mainly used in chargers installed in public places.
  • the electric vehicle charger Since this is the charging situation of the electric vehicle, the electric vehicle charger has an AC single-phase 220V terminal, a three-phase 380V terminal, a Combo 1 terminal, and a CHAdeMO terminal.
  • AC single-phase 220V terminal a three-phase 380V terminal
  • Combo 1 terminal a Combo 1 terminal
  • CHAdeMO terminal a variety of charging terminals. The user must be confused in selecting the charging terminal for his vehicle, and the charger manufacturer must insert all the terminals that may not be used in one charger, so that this should also raise the cost of manufacturing.
  • the prior art does not provide a charger that supports both the Combo 1 mode and Combo 2 mode for charging terminals in this situation and does not provide a control method for simultaneously charging an electric vehicle of a Combo 1 mode and an electric vehicle of a Combo 2 mode.
  • the prior art disclosed in Korean Patent Publication No. 10-2017-0068877 also discloses only an electric power distribution method for simultaneous charging of a plurality of electric vehicles and dose not suggest a method of supporting Combo 1 mode and Combo 2 mode at the same time.
  • the inventors of the present invention have made efforts to solve the problem of electric vehicle charging in the prior art. In order to support both the Combo 1 and Combo 2 modes of charging electric vehicles and to achieve an efficient allocation of electric power according to the electric vehicle charging status, after many efforts, the present invention has been completed.
  • Another object of the present invention is to implement an electric vehicle charger having both a Combo 1 charging terminal and a Combo 2 charging terminal to eliminate a user's inconvenience caused by a different charging terminals.
  • Embodiments of the present invention provide an electric vehicle charger for simultaneously charging electric vehicles in Combo 1 mode and Combo 2 mode, the electric vehicle charger including: a charging terminal of Combo 1 mode; a charging terminal of Combo 2 mode; a display configured to display information on an electric vehicle in charging, a charging mode, and charging information; an AC to DC conversion unit configured to convert an inputted AC power into a DC power for output; a relay unit configured to selectively connect or simultaneously connect an output power of the AC to DC conversion unit to an electric vehicle of a Combo 1 mode and an electric vehicle of a Combo 2 mode; a communication unit configured to transmit chargeable maximum electric power information to the electric vehicle of the Combo 1 mode or the electric vehicle of the Combo 2 mode; and a control unit configured to control the relay unit according to whether the electric vehicle of the Combo 1 mode or the electric vehicle of the Combo 2 mode is connected to the electric vehicle charger, and calculate a maximum electric power to be used by the electric vehicle of the Combo 1 mode and the electric vehicle of the Combo 2 mode to transmit the information
  • control unit when simultaneously charging the electric vehicle of the Combo 1 mode and the electric vehicle of the Combo 2 mode, may control an electric power amount supplied to the electric vehicles of the Combo 1 mode and the Combo 2 mode to be in inverse proportion to a ratio of a charging state of the electric vehicle of the Combo 1 mode to a charging state of the electric vehicle of the Combo 2 mode.
  • a charging method for an electric vehicle charger that includes at least one processor and memory and simultaneously supports a Combo 1 charging mode and a Combo 2 charging mode includes: charging a first electric vehicle of a Combo 1 or Combo 2 charging mode by a user's selection; and if a connection of a second electric vehicle of a charging mode different from that of an electric vehicle is detected during the charging, controlling a relay of an electric vehicle charger to simultaneously supply electric power to the first electric vehicle and the second electric vehicle, wherein electric power to be distributed to the first electric vehicle and the second electric vehicle is controlled to be inversely proportional to a ratio of a charging state of the first electric vehicle to a charging state of the second electric vehicle.
  • the present invention supports both a charging terminal of Combo 1 mode and a charging terminal of Combo 2 mode, it is possible to charge various kinds of electric vehicles regardless of the type of charging terminal.
  • FIG. 1 shows a schematic structure of an electric vehicle charger according to a preferred embodiment of the present invention.
  • FIG. 2 is a flowchart of a method for charging an electric vehicle according to another preferred embodiment of the present invention.
  • FIG. 1 shows a schematic structure of an electric vehicle charger according to a preferred embodiment of the present invention.
  • the electric vehicle charger 100 supporting the Combo 1 mode and the Combo 2 mode according to the present invention includes a Combo 1 charging terminal 110, a Combo 2 charging terminal 120, a display 130, an AC to DC converter 140, a relay unit 150, a communication unit 160, and a control unit 170.
  • the Combo 1 charging terminal is a charging terminal for supporting the charging of the Combo 1 mode and consists of a combination of a J1772 socket, that is, a single-phase AC slow charging socket, and a socket of a DC fast charging mode.
  • the Combo 1 charging terminal is mainly used in the United States.
  • the Combo 2 charging terminal is a charging terminal for supporting the charging of the Combo 2 mode and consists of a combination of an IEC-62196 socket, that is, a three-phase AC slow-charge socket, and a socket of a DC fast charging mode.
  • the Combo 2 charging terminal is mainly used in Europe.
  • the Combo 2 charging terminal supports a variety of charging modes including DC single charging, DC+three-phase AC, DC+single-phase AC, and three-phase AC single charging, it has a merit in that it may select an efficient charging method depending on the situation in comparison to the Combo 1 charging terminal.
  • V2G Vehicle to Grid
  • the display 130 displays various information related to charging. If the display 130 is a touch screen, the user may touch the display 130 to select a type of vehicle and select a charging mode. Depending on the type of vehicle, the charging terminal is set to a Combo 1 charging terminal or a Combo 2 charging terminal. The charging mode may be selected for fast charging, slow charging or simultaneous charging mode for fast charging and slow charging. Also, during charging, the display 130 displays the information of the vehicle being charged, the charging mode, the charging electric power per vehicle, and the estimated remaining time.
  • the AC to DC converter 140 converts the single-phase or three-phase AC power of the electric power source into DC for fast charging and transmits the DC to the relay unit 150.
  • the relay unit 150 includes a relay for connecting or disconnecting electric power, and under the control of the control unit 170, connects the output electric power of the AC to DC converter to the Combo 1 charging terminal 110 or the Combo 2 charging terminal 120.
  • the relay may be implemented using an insulated gate bipolar transistor (IGBT) element.
  • the communication unit 160 transmits available electric power calculated by the control unit 170 for each electric vehicle to each electric vehicle in charging by a method such as Power Line Communication (PLC).
  • PLC Power Line Communication
  • various methods such as Pulse Width Modulation (PWM), Controller Area Network (CAN), Media Oriented Systems Transport (MOST), and Local Interconnect Network (LIN) may be used.
  • PWM Pulse Width Modulation
  • CAN Controller Area Network
  • MOST Media Oriented Systems Transport
  • LIN Local Interconnect Network
  • the control unit 170 controls the relays included in the relay unit 150 according to whether the electric vehicle of the Combo 1 mode or the electric vehicle of the Combo 2 mode is connected to the electric vehicle charger 100. Also, the maximum electric power available for each electric vehicle is calculated and the information of calculated maximum electric power transmitted to each electric vehicle through the communication unit 160.
  • the control unit 170 includes one or more processors and memories.
  • the control unit 170 calculates the electric power to be distributed to each electric vehicle and notifies the electric power through the communication unit 160. Most simply, there is a method of distributing half of the available electric power to two electric vehicles, but if the State of Charge (SOC) is different for each vehicle, efficient charging may not be achieved. For example, if the SOC of the electric vehicle in Combo 1 mode and the electric vehicle in Combo 2 mode are 10% and 90%, respectively, since the electric vehicle in Combo 2 mode is already 90% charged, the charging is over soon but since electric power is still distributed at a ratio of 50:50, 50% electric power will be discarded.
  • SOC State of Charge
  • the present invention proposes another distribution method. That is to distribute the electric power according to the SOC of each electric vehicle, and as the SOC is higher, by supplying less electric power, the two electric vehicles control the charging time at the optimum speed. For example, when the charging state of the electric vehicle in Combo 1 mode is 90% and the charging state of the electric vehicle in Combo 2 mode is 10%, the ratio of the electric power supplied to the electric vehicle in the Combo 1 mode to the electric power supplied to the electric vehicle in the Combo 2 mode is controlled to 10:90 instead of 50:50.
  • the control unit 170 may shorten the charging time by continuously checking the SOC of each electric vehicle battery in real time to calculate and control the electric power ratio.
  • FIG. 2 is a flowchart of an electric vehicle charging method according to another preferred embodiment of the present invention.
  • the user selects a charging mode of the electric vehicle to be charged in the display of the charger (S210), and when the user authentication is completed, starts charging of the first electric vehicle (S220).
  • the charger When the user selects a vehicle model, the charger displays on the display the shape of the charging terminal corresponding to the model selected by the user. Or, when the user connects the charging terminal suitable to his/her vehicle type, the charger recognizes the connection status of the charging terminal so that a method of automatically supplying electric power through the corresponding charging terminal is possible.
  • the charger displays on the display a charging terminal in a manner suitable for the vehicle, and the user may connect the combo charging terminal suitable for his/her vehicle.
  • the user may connect the charging terminal of Combo 1 or Combo 2 mode directly to start charging without vehicle type selection.
  • the charger checks whether another electric vehicle is connected to the charger (S230). If there is no connection of the new electric vehicle, charging of the first electric vehicle is continued (S220).
  • the control unit of the charger controls the relay (S240) to simultaneously supply electric power of an electric power supply source to the first electric vehicle and the second electric vehicle.
  • the charger Since the electric power that may be supplied from the charger is limited, the charger must appropriately distribute the electric power supplied to the first electric vehicle and the second electric vehicle (S250).
  • electric power may be supplied to the first electric vehicle and the second electric vehicle at a ratio of 50:50. If so, since the charging speed of the first electric vehicle being charged first becomes slow, by supplying more electric power to the first electric vehicle, it is possible to think of a way to supply electric power at a rate of 60:40 or 70:30. Or, the method of distributing the electric power in inverse proportion to the ratio of the SOC of each electric vehicle is as described above.
  • an electric vehicle charging method may be implemented in the form of a program command that may be executed through various computer means and may be recorded in a computer readable medium.
  • the computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. It may be understood that program instructions stored in the medium are specially designed and configured for the present disclosure or are well known to those skilled in computer software and used.
  • Examples of computer readable media may include magnetic media such as hard disks, floppy disks, and magnetic tape, optical recording media such as CD-ROMs and DVDs, magneto-optical media such as floptical disks, and a hardware device specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like.
  • Examples of program instructions include high-level language code that may be executed by a computer using an interpreter, as well as machine code accords such as those produced by a compiler.
  • the hardware device may be configured to operate as at least one software module to perform operations of the present invention and vice versa.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The present invention relates to an electric vehicle charger capable of simultaneously charging a plurality of electric vehicles. The electric vehicle charger according to the present invention simultaneously charges an electric vehicle of a Combo 1 mode and an electric vehicle of a Combo 2 mode. For this, a control unit including one or more processors selectively controls the relay to connect the electric power to the electric vehicle selectively or simultaneously. Also, when charging electric vehicles in Combo 1 mode and Combo 2 mode at the same time, the control unit controls the amount of electric power supplied to each electric vehicle so that the charging may proceed efficiently so that it is possible not only to simultaneously charge electric vehicles having charging methods of different specifications, but also to shorten charging time.

Description

MULTI CHARGER FOR ELECTRIC VEHICLE USING BOTH COMBO 1 MODE AND COMBO 2 MODE AND METHOD THEREOF
The present invention relates to a charger for an electric vehicle and a control method thereof, and more particularly to a charger for simultaneously charging two electric vehicles and a control method thereof.
In order to charge electric vehicles, an electric vehicle charger supplies electric power in the form of AC or DC to an electric vehicle. When a charger supplies electric power in AC form, single-phase 220V AC, such as household electricity, or three-phase 380V AC is provided and as a result, the charging terminal of an electric vehicle also changes.
The situation is not different when electric power is supplied in DC form. Since there is a situation where various types of charging terminals are mixed even in the same DC, a user must select a charger according to the charging terminal type of an electric vehicle he/she owns. Currently, the fast chargers that supply DC include a Combo 1 mode, a Combo 2 mode, and a CHAdeMO mode, and use different charging terminals depending on each mode. Combo 1 mode is mainly used in the United States, Combo 2 mode is mainly used in Europe, and CHAdeMO mode is used mainly in Japan. The single-phase 220V electric power is mainly used in household chargers, and the fast charger using three-phase 380V AC or DC is mainly used in chargers installed in public places.
Since this is the charging situation of the electric vehicle, the electric vehicle charger has an AC single-phase 220V terminal, a three-phase 380V terminal, a Combo 1 terminal, and a CHAdeMO terminal. However, it is not desirable for users or charger manufacturers to have such a variety of charging terminals. The user must be confused in selecting the charging terminal for his vehicle, and the charger manufacturer must insert all the terminals that may not be used in one charger, so that this should also raise the cost of manufacturing.
To address this situation, an attempt is being made to unify the charger's charging terminal into Combo 1 mode. Since the Combo 1 mode supports both AC slow charge and DC quick charge, this is because all the vehicles may be charged if only the charging terminal is unified.
However, vehicles manufactured in and imported from Europe have terminals of Combo 2 mode, and it is not easy to convert them into terminals of Combo 1 mode in the absence of a manufacturing facility in Korea.
The prior art does not provide a charger that supports both the Combo 1 mode and Combo 2 mode for charging terminals in this situation and does not provide a control method for simultaneously charging an electric vehicle of a Combo 1 mode and an electric vehicle of a Combo 2 mode. The prior art disclosed in Korean Patent Publication No. 10-2017-0068877 also discloses only an electric power distribution method for simultaneous charging of a plurality of electric vehicles and dose not suggest a method of supporting Combo 1 mode and Combo 2 mode at the same time.
The inventors of the present invention have made efforts to solve the problem of electric vehicle charging in the prior art. In order to support both the Combo 1 and Combo 2 modes of charging electric vehicles and to achieve an efficient allocation of electric power according to the electric vehicle charging status, after many efforts, the present invention has been completed.
It is an object of the present invention to provide a charger for an electric vehicle in which a charging electric power may be efficiently used by allowing a charging electric power not efficiently used while using a conventional electric vehicle charger to be used for another electric vehicle.
Another object of the present invention is to implement an electric vehicle charger having both a Combo 1 charging terminal and a Combo 2 charging terminal to eliminate a user's inconvenience caused by a different charging terminals.
Moreover, other objects of the present invention which are not explicitly stated will be further considered within the scope easily deduced from the following detailed description and the effects thereof.
Embodiments of the present invention provide an electric vehicle charger for simultaneously charging electric vehicles in Combo 1 mode and Combo 2 mode, the electric vehicle charger including: a charging terminal of Combo 1 mode; a charging terminal of Combo 2 mode; a display configured to display information on an electric vehicle in charging, a charging mode, and charging information; an AC to DC conversion unit configured to convert an inputted AC power into a DC power for output; a relay unit configured to selectively connect or simultaneously connect an output power of the AC to DC conversion unit to an electric vehicle of a Combo 1 mode and an electric vehicle of a Combo 2 mode; a communication unit configured to transmit chargeable maximum electric power information to the electric vehicle of the Combo 1 mode or the electric vehicle of the Combo 2 mode; and a control unit configured to control the relay unit according to whether the electric vehicle of the Combo 1 mode or the electric vehicle of the Combo 2 mode is connected to the electric vehicle charger, and calculate a maximum electric power to be used by the electric vehicle of the Combo 1 mode and the electric vehicle of the Combo 2 mode to transmit the information of calculated maximum electric power through the communication unit.
In an embodiment, when simultaneously charging the electric vehicle of the Combo 1 mode and the electric vehicle of the Combo 2 mode, the control unit may control an electric power amount supplied to the electric vehicles of the Combo 1 mode and the Combo 2 mode to be in inverse proportion to a ratio of a charging state of the electric vehicle of the Combo 1 mode to a charging state of the electric vehicle of the Combo 2 mode.
In other embodiments of the present invention, a charging method for an electric vehicle charger that includes at least one processor and memory and simultaneously supports a Combo 1 charging mode and a Combo 2 charging mode includes: charging a first electric vehicle of a Combo 1 or Combo 2 charging mode by a user's selection; and if a connection of a second electric vehicle of a charging mode different from that of an electric vehicle is detected during the charging, controlling a relay of an electric vehicle charger to simultaneously supply electric power to the first electric vehicle and the second electric vehicle, wherein electric power to be distributed to the first electric vehicle and the second electric vehicle is controlled to be inversely proportional to a ratio of a charging state of the first electric vehicle to a charging state of the second electric vehicle.
As described above, according to the present invention, when charging multiple vehicles from one charger, this has the effect of efficiently distributing limited electric power.
Also, since the present invention supports both a charging terminal of Combo 1 mode and a charging terminal of Combo 2 mode, it is possible to charge various kinds of electric vehicles regardless of the type of charging terminal.
On the other hand, even if the effects are not explicitly mentioned here, the effects described in the following specification, which are expected by the technical characteristics of the present invention, and the provisional effects thereof are handled as described in the specification of the present invention.
FIG. 1 shows a schematic structure of an electric vehicle charger according to a preferred embodiment of the present invention.
FIG. 2 is a flowchart of a method for charging an electric vehicle according to another preferred embodiment of the present invention.
※ The accompanying drawings are included to provide a further understanding of the technical idea of the present invention, and thus the scope of the present invention is not limited thereto.
Below, configurations of the present invention in various embodiments and effects resulting therefrom will be described with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may obscure the subject matter of the present invention.
FIG. 1 shows a schematic structure of an electric vehicle charger according to a preferred embodiment of the present invention.
The electric vehicle charger 100 supporting the Combo 1 mode and the Combo 2 mode according to the present invention includes a Combo 1 charging terminal 110, a Combo 2 charging terminal 120, a display 130, an AC to DC converter 140, a relay unit 150, a communication unit 160, and a control unit 170.
The Combo 1 charging terminal is a charging terminal for supporting the charging of the Combo 1 mode and consists of a combination of a J1772 socket, that is, a single-phase AC slow charging socket, and a socket of a DC fast charging mode. The Combo 1 charging terminal is mainly used in the United States.
The Combo 2 charging terminal is a charging terminal for supporting the charging of the Combo 2 mode and consists of a combination of an IEC-62196 socket, that is, a three-phase AC slow-charge socket, and a socket of a DC fast charging mode. The Combo 2 charging terminal is mainly used in Europe.
Since the Combo 2 charging terminal supports a variety of charging modes including DC single charging, DC+three-phase AC, DC+single-phase AC, and three-phase AC single charging, it has a merit in that it may select an efficient charging method depending on the situation in comparison to the Combo 1 charging terminal. Especially in Vehicle to Grid (V2G) mode, since AC electric power of up to 43 kW may be supplied to the grid without conversion of the electric power, there is also an effect that the structure of the charger may be made economical and simple.
The display 130 displays various information related to charging. If the display 130 is a touch screen, the user may touch the display 130 to select a type of vehicle and select a charging mode. Depending on the type of vehicle, the charging terminal is set to a Combo 1 charging terminal or a Combo 2 charging terminal. The charging mode may be selected for fast charging, slow charging or simultaneous charging mode for fast charging and slow charging. Also, during charging, the display 130 displays the information of the vehicle being charged, the charging mode, the charging electric power per vehicle, and the estimated remaining time.
The AC to DC converter 140 converts the single-phase or three-phase AC power of the electric power source into DC for fast charging and transmits the DC to the relay unit 150.
The relay unit 150 includes a relay for connecting or disconnecting electric power, and under the control of the control unit 170, connects the output electric power of the AC to DC converter to the Combo 1 charging terminal 110 or the Combo 2 charging terminal 120. The relay may be implemented using an insulated gate bipolar transistor (IGBT) element.
The communication unit 160 transmits available electric power calculated by the control unit 170 for each electric vehicle to each electric vehicle in charging by a method such as Power Line Communication (PLC). In addition to PLC, various methods such as Pulse Width Modulation (PWM), Controller Area Network (CAN), Media Oriented Systems Transport (MOST), and Local Interconnect Network (LIN) may be used.
The control unit 170 controls the relays included in the relay unit 150 according to whether the electric vehicle of the Combo 1 mode or the electric vehicle of the Combo 2 mode is connected to the electric vehicle charger 100. Also, the maximum electric power available for each electric vehicle is calculated and the information of calculated maximum electric power transmitted to each electric vehicle through the communication unit 160. The control unit 170 includes one or more processors and memories.
Especially when the electric vehicle in Combo 1 mode and the electric vehicle in Combo 2 mode are in charging at the same time, the control unit 170 calculates the electric power to be distributed to each electric vehicle and notifies the electric power through the communication unit 160. Most simply, there is a method of distributing half of the available electric power to two electric vehicles, but if the State of Charge (SOC) is different for each vehicle, efficient charging may not be achieved. For example, if the SOC of the electric vehicle in Combo 1 mode and the electric vehicle in Combo 2 mode are 10% and 90%, respectively, since the electric vehicle in Combo 2 mode is already 90% charged, the charging is over soon but since electric power is still distributed at a ratio of 50:50, 50% electric power will be discarded.
Therefore, the present invention proposes another distribution method. That is to distribute the electric power according to the SOC of each electric vehicle, and as the SOC is higher, by supplying less electric power, the two electric vehicles control the charging time at the optimum speed. For example, when the charging state of the electric vehicle in Combo 1 mode is 90% and the charging state of the electric vehicle in Combo 2 mode is 10%, the ratio of the electric power supplied to the electric vehicle in the Combo 1 mode to the electric power supplied to the electric vehicle in the Combo 2 mode is controlled to 10:90 instead of 50:50. The control unit 170 may shorten the charging time by continuously checking the SOC of each electric vehicle battery in real time to calculate and control the electric power ratio.
FIG. 2 is a flowchart of an electric vehicle charging method according to another preferred embodiment of the present invention.
The user selects a charging mode of the electric vehicle to be charged in the display of the charger (S210), and when the user authentication is completed, starts charging of the first electric vehicle (S220).
When the user selects a vehicle model, the charger displays on the display the shape of the charging terminal corresponding to the model selected by the user. Or, when the user connects the charging terminal suitable to his/her vehicle type, the charger recognizes the connection status of the charging terminal so that a method of automatically supplying electric power through the corresponding charging terminal is possible.
For example, when the user selects SM3 of the Renault Samsung vehicle from the display, the charger displays on the display a charging terminal in a manner suitable for the vehicle, and the user may connect the combo charging terminal suitable for his/her vehicle. Or, if the user knows the connection method of his/her electric vehicle, the user may connect the charging terminal of Combo 1 or Combo 2 mode directly to start charging without vehicle type selection.
During charging of the first electric vehicle, the charger checks whether another electric vehicle is connected to the charger (S230). If there is no connection of the new electric vehicle, charging of the first electric vehicle is continued (S220).
When the connection of the second electric vehicle is detected, the control unit of the charger controls the relay (S240) to simultaneously supply electric power of an electric power supply source to the first electric vehicle and the second electric vehicle.
Since the electric power that may be supplied from the charger is limited, the charger must appropriately distribute the electric power supplied to the first electric vehicle and the second electric vehicle (S250).
Simply, electric power may be supplied to the first electric vehicle and the second electric vehicle at a ratio of 50:50. If so, since the charging speed of the first electric vehicle being charged first becomes slow, by supplying more electric power to the first electric vehicle, it is possible to think of a way to supply electric power at a rate of 60:40 or 70:30. Or, the method of distributing the electric power in inverse proportion to the ratio of the SOC of each electric vehicle is as described above.
With the electric vehicle charger supporting both Combo 1 mode and Combo 2 mode of the present invention, there is an effect that the electric vehicle may be charged regardless of the charging terminal, and when charging two or more electric vehicles, there is an advantage that electric power may be effectively distributed.
For reference, an electric vehicle charging method according to an embodiment of the present invention may be implemented in the form of a program command that may be executed through various computer means and may be recorded in a computer readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. It may be understood that program instructions stored in the medium are specially designed and configured for the present disclosure or are well known to those skilled in computer software and used.
Examples of computer readable media may include magnetic media such as hard disks, floppy disks, and magnetic tape, optical recording media such as CD-ROMs and DVDs, magneto-optical media such as floptical disks, and a hardware device specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions include high-level language code that may be executed by a computer using an interpreter, as well as machine code accords such as those produced by a compiler. The hardware device may be configured to operate as at least one software module to perform operations of the present invention and vice versa.
The protected scope of the present invention is not limited to the description and the expression of the embodiments explicitly described above. It is again added that the protected scope of the present invention is not limited by obvious changes or substitutions in the technical field to which the present invention belongs.

Claims (3)

  1. An electric vehicle charger for simultaneously charging electric vehicles in Combo 1 mode and Combo 2 mode, the electric vehicle charger comprising:
    a charging terminal of Combo 1 mode;
    a charging terminal of Combo 2 mode;
    a display configured to display information on an electric vehicle in charging, a charging mode, and charging information;
    an AC to DC conversion unit configured to convert an inputted AC power into a DC power for output;
    a relay unit configured to selectively connect or simultaneously connect an output power of the AC to DC conversion unit to an electric vehicle of a Combo 1 mode and an electric vehicle of a Combo 2 mode;
    a communication unit configured to transmit chargeable maximum electric power information to the electric vehicle of the Combo 1 mode or the electric vehicle of the Combo 2 mode; and
    a control unit configured to control the relay unit according to whether the electric vehicle of the Combo 1 mode or the electric vehicle of the Combo 2 mode is connected to the electric vehicle charger, and calculate a maximum electric power to be used by the electric vehicle of the Combo 1 mode and the electric vehicle of the Combo 2 mode to transmit the information of calculated maximum electric power through the communication unit.
  2. The electric vehicle charger of claim 1, wherein when simultaneously charging the electric vehicle of the Combo 1 mode and the electric vehicle of the Combo 2 mode, the control unit controls an electric power amount supplied to the electric vehicles of the Combo 1 mode and the Combo 2 mode to be in inverse proportion to a ratio of a charging state of the electric vehicle of the Combo 1 mode to a charging state of the electric vehicle of the Combo 2 mode.
  3. A charging method for an electric vehicle charger that includes at least one processor and memory and simultaneously supports a Combo 1 charging mode and a Combo 2 charging mode, the method comprising:
    charging a first electric vehicle of a Combo 1 or Combo 2 charging mode by a user's selection; and
    if a connection of a second electric vehicle of a charging mode different from that of the first electric vehicle is detected during the charging, controlling a relay of an electric vehicle charger to simultaneously supply electric power to the first electric vehicle and the second electric vehicle,
    wherein electric power to be distributed to the first electric vehicle and the second electric vehicle is controlled to be inversely proportional to a ratio of a charging state of the first electric vehicle to a charging state of the second electric vehicle.
PCT/KR2018/013826 2017-11-14 2018-11-13 Multi charger for electric vehicle using both combo 1 mode and combo 2 mode and method thereof Ceased WO2019098646A1 (en)

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