WO2019074287A1 - Electric vehicle charger using energy storage system - Google Patents

Electric vehicle charger using energy storage system Download PDF

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Publication number
WO2019074287A1
WO2019074287A1 PCT/KR2018/011938 KR2018011938W WO2019074287A1 WO 2019074287 A1 WO2019074287 A1 WO 2019074287A1 KR 2018011938 W KR2018011938 W KR 2018011938W WO 2019074287 A1 WO2019074287 A1 WO 2019074287A1
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WO
WIPO (PCT)
Prior art keywords
power
energy storage
electric vehicle
electric
storage unit
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PCT/KR2018/011938
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French (fr)
Korean (ko)
Inventor
김경진
Original Assignee
르노삼성자동차 주식회사
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Publication of WO2019074287A1 publication Critical patent/WO2019074287A1/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
    • B60L53/20—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 converters located in the vehicle
    • 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
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • 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
    • B60L2210/10—DC to DC converters
    • B60L2210/14—Boost 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
    • B60L2210/00—Converter types
    • B60L2210/30—AC to DC converters
    • 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
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility
    • 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

Definitions

  • the present invention relates to an electric vehicle charging system, and more particularly, to an electric vehicle charger using an energy storage system.
  • Electricity is required to charge an electric vehicle.
  • Current electric vehicle charging methods include AC (continuous charge) charging method using single-phase power of 220V and AC three-phase charging method charging with a separate three-phase electric power of 380V instead of domestic electric power, DC (direct current) And a rapid charging method of a combo method or a car demo method for charging and converting.
  • the rapid charging method has the advantage of charging the electric vehicle in a relatively short time of 15 to 30 minutes, but there is a problem that it is difficult to install it in the home for personal use because of the installation cost of the charger or the power supply. Therefore, it is a reality that the fast charger is mainly installed in a public place such as a public institution building or a large mart, and a slow charger using a single-phase power for home is used in a general household.
  • Electricity charges vary according to the charging capacity per hour, and the charge varies depending on the time zone in which the electric power is used. If you lower the charge per hour and charge the charge at a lower cost, you can save electricity, but if you lower the charge per hour, the charge time will be longer and you will not be able to choose the charge time.
  • the inventors of the present invention have continued researches to solve these various problems, and after a lot of efforts, in the conventional technology, the energy storage system (ESS: Energy Storage System ) To complete a system capable of more stably charging the electric vehicle.
  • ESS Energy Storage System
  • the present invention relates to an electric vehicle charger
  • An AC / DC converter that receives AC power from a power source and converts the DC power into DC power and transfers the DC power to an energy storage unit, converts the DC power supplied from the energy storage unit to AC,
  • An energy storage unit for receiving and storing DC power converted from the AC / DC converter and storing the stored DC power to the AC / DC converter;
  • DC converter according to the amount of electric power stored in the energy storing unit and controls the amount of electric power to be supplied to the AC / DC converter according to the sum of the amount of electric power delivered to the electric vehicle from the AC / And a control unit for controlling the duty cycle of the control signal transmitted to the vehicle.
  • An AC / DC converter that receives AC power from a power source and converts the DC power to DC and transmits the DC power to an electric vehicle or an energy storage unit;
  • An energy storage unit for receiving the DC power converted from the AC / DC converter and storing the stored DC power, and delivering the stored DC power to the electric vehicle;
  • a control unit for controlling the amount of electric power delivered to the electric vehicle according to the amount of electric power stored in the energy storage unit and controlling the amount of electric energy corresponding to the sum of the amount of electric power delivered from the energy storage unit to the electric vehicle and the amount of electric energy transmitted from the AC / To the control signal transmitted to the electric vehicle.
  • an electric vehicle charger control method including:
  • the AC power supplied from the power supply source is converted into DC and stored in the energy storage device to determine whether the power supply mode is the boost mode or not.
  • the boost mode the power stored in the energy storage device and the power supplied from the power supply source, If the mode is not the boost mode, only the electric power stored in the energy storage device is transmitted to the electric vehicle,
  • Information about the amount of electric power delivered to the electric vehicle is included in a control signal transmitted to the electric vehicle and is transmitted.
  • an energy storage system can be used to stably supply electric power for charging an electric vehicle.
  • Fig. 1 shows a configuration example of a charger for an electric vehicle for supplying AC power according to a preferred embodiment of the present invention.
  • Fig. 2 shows a configuration example of a charger for an electric vehicle that supplies DC power according to another preferred embodiment of the present invention.
  • FIG. 3 shows a flowchart of a method of controlling an electric vehicle charger according to another embodiment of the present invention.
  • FIG. 1 shows a configuration example of a charger for an electric vehicle according to a preferred embodiment of the present invention.
  • the electric vehicle charger 100 of FIG. 1 includes an electric AC / DC converter 110, an energy storage unit 120, and a controller 130.
  • the electric AC / DC converter 110 is a charger that transfers AC type electric power to an electric vehicle.
  • the AC / DC converter 110 converts the AC power supplied from the power source to DC and stores it in the energy storage unit 120 or converts the DC power stored in the energy storage unit 120 to AC.
  • the AC single phase type charger or the AC three phase type charger supplies electric power in the form of alternating current for charging the electric vehicle, the alternating current is converted into direct current, stored in the energy storage unit 120, An AC / DC converter 110 is required to convert and supply the electric vehicle.
  • the energy storage unit 120 includes an energy storage system (ESS) capable of storing electric energy.
  • Energy storage has physical energy storage and chemical energy storage depending on the storage method.
  • energy storage systems used in electric vehicles are chemical energy storage systems using lithium ion batteries, lead accumulators, and NaS (sodium sulfur) batteries.
  • Battery-based energy storage system is called BESS (Battery Energy Storage System), and BESS is often referred to as energy storage system.
  • the energy storage system of the present invention is preferably capable of recycling a lithium ion battery that is used in an electric vehicle and remains after replacement.
  • the control unit 130 may include one or more processors and a memory, and controls the AC / DC converter 110 and the energy storage unit 120 to control electric power supplied to the electric vehicle.
  • the controller 130 controls the AC / DC converter to convert the AC single-phase or three-phase power received from the power source into DC, and stores the converted DC in the energy storage unit 120. At this time, it is possible to control power to be stored in the energy storage unit 120 only for a predetermined time.
  • the electricity rate varies with time, so that electricity can be saved in the energy storage unit 120 if the user selects the night time zone, for example, inexpensive electricity.
  • the stored power is used to charge the electric vehicle.
  • the energy storage unit 120 can be used alone in addition to the power of the external power source, that is, used in the boost mode, when the charging power is supplied to the electric vehicle according to the storage capacity of the energy storage unit 120 It is possible.
  • the electric power for the electric vehicle is determined based on the electric power (kWh) per hour.
  • electric power supplied from the electric power source can be reduced, will be.
  • the energy storage unit 120 can receive power of 4 kWh in the case of a continuous charge using a power of 7 kWh, an external power supply may receive only 3 kWh of power, .
  • the controller 130 supplies electric power to the electric vehicle in a boost mode or a stand-alone mode for electric vehicle charging.
  • the boost mode is a mode in which the power of the energy storage unit 120 is used to assist the power supplied from an external power source.
  • the controller 130 adjusts the ratio of the power of the energy storage unit 120 and the power of the power source according to the capacity and the charging status of the energy storage unit 120 and supplies the power.
  • only electric power stored in the energy storage unit 120 is used to supply charging electric power to the electric vehicle.
  • the control unit 130 adjusts the charging speed of the electric vehicle according to the capacity of the stored electric power.
  • the control unit 130 also communicates with the electric vehicle and transmits information necessary for charging.
  • the electric vehicle charger 100 may further include a communication unit (not shown).
  • Various methods such as CP (Control Pilot), PLC (Power Line Communication) and CAN (Control Area Network) are used for communication with electric vehicles.
  • the information that the controller 130 should deliver to the electric vehicle is information about the amount of electric power that is actually transmitted to the electric vehicle.
  • the duty cycle of PWM Pulse Width Modulation
  • Table 1 below shows an example of the duty cycle of the CP signal according to the stored power amount of the energy storage unit 120 in the boost mode.
  • the control unit 130 sets the duty cycle to 53% to transmit the CP signal And if the power that can be supplied from the energy storage unit 120 is less than 3 kWh and does not reach 7 kWh in addition to the electric power of the electric power source, the duty cycle is adjusted and transmitted to the electric vehicle.
  • Table 2 shows an example of the duty cycle of the CP signal in the single mode that transfers power to the electric vehicle only with the electric power of the energy storage unit 120.
  • the CP signal whose duty cycle is controlled to 30% is transmitted to the electric vehicle.
  • the electric vehicle grasps the power allocated to itself by only the PWM duty cycle of the CP signal and charges the battery to the corresponding electric power, an unintended situation may occur unless the correct PWM duty cycle is informed by the charger. For example, if the user sets the charger in a sole mode that supplies power only by the power of the energy storage unit 120 and the duty cycle of the PWM is not appropriately changed and is set to 7 kWh, which is the boost mode, So that it will be supplied by the charger in excess of 3 kWh, resulting in unintentional electricity charges. Or when a circuit breaker is operated by judging that an excessive power supply is generated in the power supply source as a short circuit, the power supply is cut off and charging may not be performed.
  • FIG. 2 shows a configuration example of a charger for an electric vehicle according to another preferred embodiment of the present invention.
  • the electric car charger 200 shown in FIG. 2 is a charger that transfers electric power of direct current type to an electric car.
  • the electric car charger 200 includes an electric AC / DC converter 210, an energy storage unit 220 and a control unit 230.
  • the AC / DC converter 210 converts the AC power supplied from the power supply source to DC, stores it in the energy storage unit 120, or transmits it to the electric vehicle.
  • the energy storage unit 220 is made up of an energy storage system (ESS), and is not different from the energy storage unit 120 of FIG. 1 in that a lithium ion battery that is used after being used in an electric vehicle can be recycled and used. However, the power stored in the energy storage unit 220 is different from the AC charger in that it is directly transmitted to the electric vehicle through the AC / DC converter.
  • ESS energy storage system
  • the control unit 230 may include at least one processor and a memory and controls the AC / DC converter 210 and the energy storage unit 220 to regulate electric power supplied to the electric vehicle.
  • the controller 230 controls the AC / DC converter 210 to convert the AC single-phase or three-phase power received from the power source into DC and stores the converted DC in the energy storage unit 220. At this time, the controller 230 may store the power in the energy storing unit 220 only for a predetermined time set in advance according to the user setting. And electric power charges such as late night hours are used to save electricity charges necessary for charging.
  • the power stored in the energy storage unit 220 is used as a stand-alone mode or a boost mode depending on the storage capacity of the energy storage unit 220, as described above.
  • the controller 230 controls the energy storage unit 220 to supply electric power to the electric vehicle in a boost mode or a stand-alone mode.
  • the power supply method of the boost mode and the stand-alone mode is as described above.
  • the controller 230 communicates with the electric vehicle and transmits information necessary for charging, and can transmit such information using CAN communication.
  • CAN communication it is possible to deliver the correct amount of electric power that can be charged to the electric vehicle, and the electric vehicle can use only the electric power thus allocated for charging.
  • By charging according to the exact power information it is possible to prevent the problem of pulling excess power from the power source or shutting off the power supply by operating the signal breaker.
  • FIG. 3 is a flowchart of a method of controlling an electric vehicle charger according to another embodiment of the present invention.
  • the electric vehicle charger converts the electric power supplied from the electric power source into direct current and stores it in the energy storage device (S310).
  • control method of the electric vehicle charger may be implemented in the form of a program command which can be executed through various computer means and 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.
  • the program instructions recorded on the medium may be those specially designed and constructed for the present invention or may be available to those skilled in the art of computer software.
  • Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape, optical recording media such as CD-ROMs, DVDs, magneto-optical media such as floptical disks, A hard disk drive, a flash memory, and the like.
  • Examples of program instructions include high-level language code that can be executed by a computer using an interpreter, as well as machine accords such as those produced by a compiler.
  • the hardware devices described above may be configured to operate as one or more software modules to perform the 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)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The present invention relates to an electric vehicle charger. The electric vehicle charger of the present invention comprises: an alternating current (AC)/direct current (DC) converter which receives AC power supplied from a power supply source, converts the received AC power into DC power, and transmits the converted DC power to an energy storage unit, and which converts DC power supplied from the energy storage unit into AC power and transmits the converted AC power to an electric vehicle; the energy storage unit which receives converted DC power supplied from the AC/DC converter and stores the same, and which transmits stored DC power to the AC/DC converter; and a control unit for controlling the amount of power to be transmitted to the AC/DC converter according to the amount of power stored in the energy storage unit, and controlling the duty cycle of a control signal to be transmitted to the electric vehicle according to the sum of the amount of power transmitted from the AC/DC converter to the electric vehicle and the amount of power transmitted from the power supply source to the electric vehicle.

Description

에너지 저장 시스템을 이용한 전기 자동차 충전기Electric vehicle charger using energy storage system
본 발명은 전기 자동차 충전 시스템에 관하며, 더욱 상세하게는 에너지 저장 시스템을 이용하는 전기 자동차 충전기에 관한 것이다.The present invention relates to an electric vehicle charging system, and more particularly, to an electric vehicle charger using an energy storage system.
전기 자동차(Electric Vehicle)를 충전하기 위해서는 전력이 필요하다. 현재 전기 자동차를 충전하는 방식으로는 220V의 가정용 단상 전력을 이용하는 교류(AC) 완속 충전 방식과, 가정용 전력이 아닌 380V의 별도 삼상 전력을 공급받아 충전하는 AC 3상 충전 방식, 직류(DC)로 변환하여 충전하는 콤보방식 또는 차데모 방식의 급속 충전 방식이 있다.Electricity is required to charge an electric vehicle. Current electric vehicle charging methods include AC (continuous charge) charging method using single-phase power of 220V and AC three-phase charging method charging with a separate three-phase electric power of 380V instead of domestic electric power, DC (direct current) And a rapid charging method of a combo method or a car demo method for charging and converting.
급속 충전 방식은 15~30분의 비교적 짧은 시간에 전기 자동차를 충전할 수 있는 장점이 있지만 충전기 설치비용이나 전력공급의 문제 때문에 개인용으로 가정에 설치하기는 어려운 문제가 있다. 따라서 급속 충전기는 주로 공공기관 건물이나 대형마트 등의 공공장소에 주로 설치가 이루어지고 일반 가정에서는 가정용 단상 전력을 이용하는 완속 충전기를 사용하는 것이 현실이다.The rapid charging method has the advantage of charging the electric vehicle in a relatively short time of 15 to 30 minutes, but there is a problem that it is difficult to install it in the home for personal use because of the installation cost of the charger or the power supply. Therefore, it is a reality that the fast charger is mainly installed in a public place such as a public institution building or a large mart, and a slow charger using a single-phase power for home is used in a general household.
하지만 이러한 완속 충전기의 설치도 만만치는 않다. 개인이 설치하기에는 충전기가 고가이고 설치 공사비도 비쌀 뿐 아니라 가정용 전기는 그 품질이 전기 자동차를 충전하기에 좋은 편은 아니어서 안정화를 위해 절연 변압기 등 추가 장비가 필요하기 때문이다. However, installation of such a fast charger is not easy. Chargers are expensive and installation costs are expensive for an individual to install, and home electric appliances are not good for charging electric vehicles because they require additional equipment such as an isolation transformer for stabilization.
어렵게 충전기를 설치한 후에도 전력요금이라는 또 다른 문제가 남아있다. 전력요금은 시간당 충전 용량에 따라 기본 요금이 달라지고, 전력이 사용되는 시간대에 따라 사용 요금도 달라진다. 시간당 충전 용량을 낮추고 사용 요금이 저렴한 시간에 충전을 한다면 전력요금을 절약할 수 있으나, 시간당 충전 용량을 낮추면 충전 시간이 길어지고, 충전을 하는 시간대는 마음대로 선택하기 힘들다.Even after installing the charger, another problem of power charges remains. Electricity charges vary according to the charging capacity per hour, and the charge varies depending on the time zone in which the electric power is used. If you lower the charge per hour and charge the charge at a lower cost, you can save electricity, but if you lower the charge per hour, the charge time will be longer and you will not be able to choose the charge time.
본 발명의 발명자들은 이러한 여러 가지 문제점들을 개선하기 위해 연구를 지속해 왔고, 많은 노력 끝에 종래 기술에서 전력선에 의해 공급되는 전력에만 의존하여 전기 자동차를 충전하던 방식에서 벗어나 에너지 저장 시스템(ESS: Energy Storage System)을 이용하여 보다 안정적으로 전기 자동차를 충전할 수 있는 시스템을 완성하기에 이르렀다.The inventors of the present invention have continued researches to solve these various problems, and after a lot of efforts, in the conventional technology, the energy storage system (ESS: Energy Storage System ) To complete a system capable of more stably charging the electric vehicle.
본 발명의 목적은 에너지 저장 시스템을 이용하여 보다 안정적으로 전기 자동차 충전 전력을 공급할 수 있는 전기 자동차용 충전기를 구현함에 있다.It is an object of the present invention to provide a charger for an electric vehicle capable of supplying an electric vehicle charging electric power more stably using an energy storage system.
또한, 본 발명의 다른 목적은 에너지 저장 시스템을 이용함으로써 충전시간의 제약 없이 저렴한 전력요금으로 전기 자동차를 충전할 수 있도록 하는 것에 있다.It is another object of the present invention to provide an electric energy storage system capable of charging an electric vehicle at a low electric power cost without being limited by charging time.
한편, 본 발명의 명시되지 않은 또 다른 목적들은 하기의 상세한 설명 및 그 효과로부터 용이하게 추론 할 수 있는 범위 내에서 추가적으로 고려될 것이다.On the other hand, other unspecified purposes of the present invention will be further considered within the scope of the following detailed description and easily deduced from the effects thereof.
본 발명은 전기 자동차 충전기로서:The present invention relates to an electric vehicle charger,
전력공급원으로부터 교류전력을 공급받아 직류로 변환하여 에너지 저장부로 전달하고, 상기 에너지 저장부로부터 공급받은 직류 전력을 교류로 변환하여 전기 자동차에 전달하는 교류/직류 변환기;An AC / DC converter that receives AC power from a power source and converts the DC power into DC power and transfers the DC power to an energy storage unit, converts the DC power supplied from the energy storage unit to AC,
상기 교류/직류 변환기로부터 변환된 직류 전력을 공급받아 저장해두고 저장해 둔 직류 전력을 상기 교류/직류 변환기에 전달하는 에너지 저장부; 및An energy storage unit for receiving and storing DC power converted from the AC / DC converter and storing the stored DC power to the AC / DC converter; And
상기 에너지 저장부에 저장된 전력량에 따라 상기 교류/직류 변환기로 전달되는 전력량을 조절하고, 상기 교류/직류 변환기에서 전기 자동차로 전달되는 전력량과 상기 전력공급원에서 전기 자동차로 전달되는 전력량의 합에 따라 전기 자동차로 전달되는 제어신호의 듀티 사이클을 조절하는 제어부를 포함하는 것을 특징으로 한다.DC converter according to the amount of electric power stored in the energy storing unit and controls the amount of electric power to be supplied to the AC / DC converter according to the sum of the amount of electric power delivered to the electric vehicle from the AC / And a control unit for controlling the duty cycle of the control signal transmitted to the vehicle.
본 발명의 바람직한 다른 실시예에 따른 전기 자동차 충전기는:An electric vehicle charger according to another preferred embodiment of the present invention includes:
전력공급원으로부터 교류 전력을 공급받아 직류로 변환하여 전기 자동차 또는 에너지 저장부에 전달하는 교류/직류 변환기;An AC / DC converter that receives AC power from a power source and converts the DC power to DC and transmits the DC power to an electric vehicle or an energy storage unit;
상기 교류/직류 변환기로부터 변환된 직류 전력을 공급받아 저장해두고 저장해 둔 직류 전력을 전기 자동차에 전달하는 에너지 저장부; 및An energy storage unit for receiving the DC power converted from the AC / DC converter and storing the stored DC power, and delivering the stored DC power to the electric vehicle; And
상기 에너지 저장부에 저장된 전력량에 따라 전기 자동차로 전달되는 전력량을 조절하고, 상기 에너지 저장부에서 전기 자동차로 전달되는 전력량과 상기 교류/직류 변환기에서 전기 자동차로 전달되는 전력량의 합에 해당하는 전력량 정보를 전기 자동차로 전달되는 제어신호에 포함시켜 전달하는 제어부를 포함한다.And a control unit for controlling the amount of electric power delivered to the electric vehicle according to the amount of electric power stored in the energy storage unit and controlling the amount of electric energy corresponding to the sum of the amount of electric power delivered from the energy storage unit to the electric vehicle and the amount of electric energy transmitted from the AC / To the control signal transmitted to the electric vehicle.
또한, 본 발명의 바람직한 또 다른 실시예에 따른 전기 자동차 충전기 제어방법은:According to another aspect of the present invention, there is provided an electric vehicle charger control method including:
전력공급원으로부터 공급받은 교류 전력을 직류로 변환하여 에너지 저장 장치에 저장해두고, 전력 공급 모드가 부스트모드인지 판단하여, 부스트모드이면 상기 에너지 저장 장치에 저장된 전력과 전력공급원으로부터 공급받은 전력을 합하여 전기 자동차에 전달하고, 부스트모드가 아니면 상기 에너지 저장 장치에 저장된 전력만 전기 자동차에 전달하고,The AC power supplied from the power supply source is converted into DC and stored in the energy storage device to determine whether the power supply mode is the boost mode or not. In the boost mode, the power stored in the energy storage device and the power supplied from the power supply source, If the mode is not the boost mode, only the electric power stored in the energy storage device is transmitted to the electric vehicle,
상기 전기 자동차에 전달되는 전력량에 대한 정보를 상기 전기 자동차로 전달되는 제어신호에 포함시켜 전달하는 것을 특징으로 한다.Information about the amount of electric power delivered to the electric vehicle is included in a control signal transmitted to the electric vehicle and is transmitted.
위와 같은 본 발명의 과제해결수단에 의해서 본 발명은 에너지 저장 시스템을 이용하여 안정적으로 전기 자동차에 충전용 전력을 공급할 수 있는 장점이 있다.According to an embodiment of the present invention, an energy storage system can be used to stably supply electric power for charging an electric vehicle.
또한, 에너지 저장 시스템에 전력을 저장해 두고 필요한 시간에 전기 자동차 충전을 위해 사용할 수 있으므로 전력요금을 절약할 수 있는 효과도 있다.In addition, it is possible to save electric power in the energy storage system and save electric power charges because it can be used to charge the electric vehicle at the required time.
한편, 여기에서 명시적으로 언급되지 않은 효과라 하더라도, 본 발명의 기술적 특징에 의해 기대되는 이하의 명세서에서 기재된 효과 및 그 잠정적인 효과는 본 발명의 명세서에 기재된 것과 같이 취급됨을 첨언한다.On the other hand, even if the effects are not explicitly mentioned here, the effect described in the following specification, which is expected by the technical features of the present invention, and its potential effects are treated as described in the specification of the present invention.
도 1은 본 발명의 바람직한 어느 실시예에 따른 교류 전력을 공급하는 전기 자동차용 충전기의 구성 예를 나타낸다.Fig. 1 shows a configuration example of a charger for an electric vehicle for supplying AC power according to a preferred embodiment of the present invention.
도 2는 본 발명의 바람직한 다른 실시예에 따른 직류 전력을 공급하는 전기 자동차용 충전기의 구성 예를 나타낸다.Fig. 2 shows a configuration example of a charger for an electric vehicle that supplies DC power according to another preferred embodiment of the present invention.
도 3은 본 발명의 또 다른 실시예에 따른 전기 자동차 충전기의 제어방법의 흐름도를 나타낸다.3 shows a flowchart of a method of controlling an electric vehicle charger according to another embodiment of the present invention.
※ 첨부된 도면은 본 발명의 기술사상에 대한 이해를 위하여 참조로서 예시된 것임을 밝히며, 그것에 의해 본 발명의 권리범위가 제한되지는 아니한다.* The accompanying drawings illustrate examples of the present invention in order to facilitate understanding of the technical idea of the present invention, and thus the scope of the present invention is not limited thereto.
이하, 도면을 참조하여 본 발명의 다양한 실시예가 안내하는 본 발명의 구성과 그 구성으로부터 비롯되는 효과에 대해 살펴본다. 본 발명을 설명함에 있어서 관련된 공지기능에 대하여 이 분야의 기술자에게 자명한 사항으로서 본 발명의 요지를 불필요하게 흐릴 수 있다고 판단되는 경우에는 그 상세한 설명을 생략한다.BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. 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.
도 1은 본 발명의 바람직한 어느 실시예에 따른 전기 자동차용 충전기의 구성 예를 나타낸다.1 shows a configuration example of a charger for an electric vehicle according to a preferred embodiment of the present invention.
도 1의 전기 자동차 충전기(100)는 교류 형태의 전력을 전기 자동차에 전달하는 충전기로, 전기교류/직류 변환기(110), 에너지 저장부(120) 및 제어부(130)를 포함하여 구성된다.The electric vehicle charger 100 of FIG. 1 includes an electric AC / DC converter 110, an energy storage unit 120, and a controller 130. The electric AC / DC converter 110 is a charger that transfers AC type electric power to an electric vehicle.
교류/직류 변환기(110)는 전력공급원으로부터 공급받는 교류 전력을 직류로 변환하여 에너지 저장부(120)에 저장하거나 에너지 저장부(120)에 저장된 직류 전력을 다시 교류로 전환한다.The AC / DC converter 110 converts the AC power supplied from the power source to DC and stores it in the energy storage unit 120 or converts the DC power stored in the energy storage unit 120 to AC.
교류 단상 방식의 충전기나 교류 3상 방식의 충전기는 교류의 형태로 전력을 전기 자동차에 충전을 위해 공급하기 때문에, 교류를 직류로 변환하여 에너지 저장부(120)에 저장하고 저장된 직류를 다시 교류로 변환하여 전기 자동차에 공급하기 위해 교류/직류 변환기(110)가 필요하다.Since the AC single phase type charger or the AC three phase type charger supplies electric power in the form of alternating current for charging the electric vehicle, the alternating current is converted into direct current, stored in the energy storage unit 120, An AC / DC converter 110 is required to convert and supply the electric vehicle.
에너지 저장부(120)는 전기 에너지를 저장할 수 있는 에너지 저장 시스템(ESS: Energy Storage System)으로 구성된다. 에너지 저장은 저장 방식에 따라 물리적 에너지 저장과 화학적 에너지 저장이 있다. 이 중 전기 자동차에 사용되는 에너지 저장 시스템은 리튬이온배터리, 납축전지, NaS(나트륨 황) 전지 등을 사용하는 화학적 에너지 저장 시스템이다. 배터리 형식의 에너지 저장 시스템을 BESS(Battery Energy Storage System) 이라고 하며, 흔히 에너지 저장 시스템이라고 하면 BESS를 말한다. 본 발명의 에너지 저장 시스템으로는 바람직하게는 전기 자동차에서 사용되다가 교체 후 남게 되는 리튬이온 배터리를 재활용 할 수 있다.The energy storage unit 120 includes an energy storage system (ESS) capable of storing electric energy. Energy storage has physical energy storage and chemical energy storage depending on the storage method. Among them, energy storage systems used in electric vehicles are chemical energy storage systems using lithium ion batteries, lead accumulators, and NaS (sodium sulfur) batteries. Battery-based energy storage system is called BESS (Battery Energy Storage System), and BESS is often referred to as energy storage system. The energy storage system of the present invention is preferably capable of recycling a lithium ion battery that is used in an electric vehicle and remains after replacement.
제어부(130)는 하나 이상의 프로세서와 메모리를 포함하여 구성될 수 있으며, 교류/직류 변환기(110)와 에너지 저장부(120)를 제어하여 전기 자동차에 공급되는 전력을 조절한다.The control unit 130 may include one or more processors and a memory, and controls the AC / DC converter 110 and the energy storage unit 120 to control electric power supplied to the electric vehicle.
제어부(130)는 교류/직류 변환기를 제어하여 전력공급원으로부터 공급받은 교류 단상 또는 3상 전력을 직류로 변환하여 에너지 저장부(120)에 저장한다. 이 때 미리 설정해 놓은 일정한 시간에만 전력을 에너지 저장부(120)에 저장하도록 제어할 수 있다. 전기 요금은 시간에 따라 달라지므로 전기 요금이 저렴한, 이를테면 사용자가 심야 시간대를 선택해 두면 값 싼 전기를 에너지 저장부(120)에 저장할 수 있는 것이다.The controller 130 controls the AC / DC converter to convert the AC single-phase or three-phase power received from the power source into DC, and stores the converted DC in the energy storage unit 120. At this time, it is possible to control power to be stored in the energy storage unit 120 only for a predetermined time. The electricity rate varies with time, so that electricity can be saved in the energy storage unit 120 if the user selects the night time zone, for example, inexpensive electricity.
이렇게 저장해 둔 전력은 전기 자동차를 충전하는데 사용한다. 에너지 저장부(120)의 저장 용량에 따라 전기 자동차에 충전용 전력을 공급할 때 에너지 저장부(120)를 단독으로 사용할 수 있고, 외부의 전력공급원의 전력에 더하여 사용하는, 즉, 부스트모드로 사용할 수도 있다.The stored power is used to charge the electric vehicle. The energy storage unit 120 can be used alone in addition to the power of the external power source, that is, used in the boost mode, when the charging power is supplied to the electric vehicle according to the storage capacity of the energy storage unit 120 It is possible.
현재 전기 자동차용 전력은 시간당 전력(kWh)에 따라 기본요금이 정해지는데, 본 발명에 따른 전기 자동차 충전기(100)를 사용하면 전력공급원에서 공급받는 전력을 줄일 수 있으므로 기본요금을 더 절약할 수 있는 것이다. 예컨대, 통상 7kWh의 전력을 사용하는 완속 충전인 경우 에너지 저장부(120)에서 4kWh의 전력을 공급받을 수 있다면 외부의 전력공급원에서는 3kWh의 전력만 공급받으면 되므로 기본요금을 반 이상 절약할 수 있는 효과가 있는 것이다.The electric power for the electric vehicle is determined based on the electric power (kWh) per hour. By using the electric vehicle charger 100 according to the present invention, electric power supplied from the electric power source can be reduced, will be. For example, if the energy storage unit 120 can receive power of 4 kWh in the case of a continuous charge using a power of 7 kWh, an external power supply may receive only 3 kWh of power, .
제어부(130)는 전기 자동차 충전을 위해 부스트모드 또는 단독모드로 전기 자동차에 전력을 공급한다.The controller 130 supplies electric power to the electric vehicle in a boost mode or a stand-alone mode for electric vehicle charging.
부스트모드는 에너지 저장부(120)의 전력을 외부의 전력공급원으로부터 공급받는 전력을 보조하기 위해 사용하는 모드이다. 제어부(130)는 에너지 저장부(120)의 용량과 충전상황에 따라 에너지 저장부(120)의 전력과 전력공급원으로부터의 전력의 비율을 조절하여 공급한다.The boost mode is a mode in which the power of the energy storage unit 120 is used to assist the power supplied from an external power source. The controller 130 adjusts the ratio of the power of the energy storage unit 120 and the power of the power source according to the capacity and the charging status of the energy storage unit 120 and supplies the power.
단독모드는 에너지 저장부(120)에 저장된 전력만 사용하여 전기 자동차에 충전용 전력을 공급한다. 제어부(130)는 저장된 전력의 용량에 따라 전기 자동차의 충전 속도를 조절한다.In the stand-alone mode, only electric power stored in the energy storage unit 120 is used to supply charging electric power to the electric vehicle. The control unit 130 adjusts the charging speed of the electric vehicle according to the capacity of the stored electric power.
제어부(130)는 또한 전기 자동차와 통신을 하며 충전에 필요한 정보를 전달한다. 이를 위해 전기 자동차 충전기(100)는 통신부(미도시)를 더 포함할 수 있다. 전기 자동차와의 통신을 위해 CP(Control Pilot), PLC(Power Line Communication), CAN(Control Area Network) 등의 다양한 방식이 사용된다.The control unit 130 also communicates with the electric vehicle and transmits information necessary for charging. To this end, the electric vehicle charger 100 may further include a communication unit (not shown). Various methods such as CP (Control Pilot), PLC (Power Line Communication) and CAN (Control Area Network) are used for communication with electric vehicles.
제어부(130)가 전기 자동차에 전달해야 하는 정보는 실제 전기 자동차에 전달되는 전력의 양에 관한 정보이다. 예를 들면, CP 신호를 사용하는 경우 PWM(Pulse Width Modulation)의 듀티 사이클(duty cycle)을 조절하여 전달되는 전력의 양을 전기 자동차에 알릴 수 있다. 다음 표 1은 부스트모드일 때 에너지 저장부(120)의 저장 전력량에 따른 CP 신호의 듀티 사이클의 한 예이다.The information that the controller 130 should deliver to the electric vehicle is information about the amount of electric power that is actually transmitted to the electric vehicle. For example, when a CP signal is used, the duty cycle of PWM (Pulse Width Modulation) can be adjusted to inform the electric vehicle of the amount of electric power to be transmitted. Table 1 below shows an example of the duty cycle of the CP signal according to the stored power amount of the energy storage unit 120 in the boost mode.
Duty cycle(Boost Mode)Duty cycle (Boost Mode) ESS Battery Available EnergyESS Battery Available Energy
53 %53% 4 kWh4 kWh
45 %45% 3 kWh3 kWh
36 %36% 2 kWh2 kWh
22 %22% 1 kWh 이하1 kWh or less
에너지 저장부(120)에서 4kWh의 전력을 공급하고 외부의 전력공급원에서 3kWh의 전력을 공급하여 7kWh의 전력이 전기 자동차에 공급된다면 제어부(130)는 듀티 사이클을 53%로 설정하여 CP 신호를 전송하고, 에너지 저장부(120)에서 공급할 수 있는 전력이 3kWh 이하여서 전력공급원의 전력과 합해도 7kWh가 되지 않는다면 그에 따라 듀티 사이클을 조절하여 전기 자동차에 전달하는 것이다.If 7kWh of power is supplied from the energy storage unit 120 and 3kWh of power from an external power source to the electric vehicle, the control unit 130 sets the duty cycle to 53% to transmit the CP signal And if the power that can be supplied from the energy storage unit 120 is less than 3 kWh and does not reach 7 kWh in addition to the electric power of the electric power source, the duty cycle is adjusted and transmitted to the electric vehicle.
다음 표 2는 에너지 저장부(120)의 전력만으로 전기 자동차에 전력을 전달하는 단독모드에서의 CP 신호의 듀티 사이클의 한 예를 나타낸다.Table 2 shows an example of the duty cycle of the CP signal in the single mode that transfers power to the electric vehicle only with the electric power of the energy storage unit 120. [
Duty cycle(단독 Mode)Duty cycle (single mode) ESS Battery Available EnergyESS Battery Available Energy
30 %30% 4 kWh4 kWh
22 %22% 3 kWh3 kWh
16 %16% 2 kWh2 kWh
10 %10% 1 kWh 이하1 kWh or less
에너지 저장부(120)에서 단독으로 4kWh의 전력을 전기 자동차에 공급하면 듀티 사이클이 30%로 조절된 CP 신호가 전기 자동차로 전달된다.When 4 kWh of electric power is supplied alone to the electric vehicle in the energy storage unit 120, the CP signal whose duty cycle is controlled to 30% is transmitted to the electric vehicle.
전기 자동차는 CP 신호의 PWM 듀티 사이클만으로 자신에게 할당된 전력을 파악하고, 해당되는 전력을 끌어다 배터리에 충전하기 때문에, 충전기에서 정확한 PWM 듀티 사이클을 알려주지 않으면 의도하지 않은 상황이 발생할 수 있다. 예를 들면, 사용자가 에너지 저장부(120)의 전력만으로 전력을 공급하는 단독모드로 충전기를 설정했는데 PWM의 듀티 사이클을 적절히 바꾸어 주지 않아 부스트모드인 7kWh일때로 설정되어 있다면 전기 자동차는 7kWh의 전력을 끌어다 충전하므로 3kWh의 전력을 초과로 충전기에서 공급받아 의도치 않은 전기 요금이 발생하게 된다. 또는 전력 공급원에서 초과 전력 공급이 발생하는 것을 누전으로 판단하여 신호 차단기(Circuit Breaker)가 작동하면 전력 공급이 차단되어 충전이 되지 않는 상황이 발생할 수도 있다.Since the electric vehicle grasps the power allocated to itself by only the PWM duty cycle of the CP signal and charges the battery to the corresponding electric power, an unintended situation may occur unless the correct PWM duty cycle is informed by the charger. For example, if the user sets the charger in a sole mode that supplies power only by the power of the energy storage unit 120 and the duty cycle of the PWM is not appropriately changed and is set to 7 kWh, which is the boost mode, So that it will be supplied by the charger in excess of 3 kWh, resulting in unintentional electricity charges. Or when a circuit breaker is operated by judging that an excessive power supply is generated in the power supply source as a short circuit, the power supply is cut off and charging may not be performed.
도 2는 본 발명의 바람직한 다른 실시예에 따른 전기 자동차용 충전기의 구성 예를 나타낸다.2 shows a configuration example of a charger for an electric vehicle according to another preferred embodiment of the present invention.
도 2의 전기 자동차 충전기(200)는 직류 형태의 전력을 전기 자동차에 전달하는 충전기로, 전기교류/직류 변환기(210), 에너지 저장부(220) 및 제어부(230)를 포함하여 구성된다.The electric car charger 200 shown in FIG. 2 is a charger that transfers electric power of direct current type to an electric car. The electric car charger 200 includes an electric AC / DC converter 210, an energy storage unit 220 and a control unit 230.
교류/직류 변환기(210)는 전력공급원으로부터 공급받는 교류 전력을 직류로 변환하여 에너지 저장부(120)에 저장하거나 전기 자동차에 전달한다.The AC / DC converter 210 converts the AC power supplied from the power supply source to DC, stores it in the energy storage unit 120, or transmits it to the electric vehicle.
에너지 저장부(220)는 에너지 저장 시스템(ESS)으로 구성되고, 전기 자동차에서 사용되다가 교체 후 남게 되는 리튬이온 배터리를 재활용하여 사용할 수 있음은 도 1의 에너지 저장부(120)와 다르지 않다. 다만, 에너지 저장부(220)에 저장된 전력은 교류/직류 변환기를 거치지 않고 바로 전기 자동차에 직류로 전달되는 점이 교류 충전기와는 다르다.The energy storage unit 220 is made up of an energy storage system (ESS), and is not different from the energy storage unit 120 of FIG. 1 in that a lithium ion battery that is used after being used in an electric vehicle can be recycled and used. However, the power stored in the energy storage unit 220 is different from the AC charger in that it is directly transmitted to the electric vehicle through the AC / DC converter.
제어부(230)는 하나 이상의 프로세서와 메모리를 포함하여 구성될 수 있으며, 교류/직류 변환기(210)와 에너지 저장부(220)를 제어하여 전기 자동차에 공급되는 전력을 조절한다.The control unit 230 may include at least one processor and a memory and controls the AC / DC converter 210 and the energy storage unit 220 to regulate electric power supplied to the electric vehicle.
제어부(230)는 교류/직류 변환기(210)를 제어하여 전력공급원으로부터 공급받은 교류 단상 또는 3상 전력을 직류로 변환하여 에너지 저장부(220)에 저장한다. 이 때 제어부(230)는 사용자 설정에 따라 미리 설정해 놓은 일정한 시간에만 전력을 에너지 저장부(220)에 저장할 수도 있다. 심야시간 등의 전력 요금이 저렴한 시간을 이용하여 충전에 필요한 전기 요금을 절약하기 위함이다. The controller 230 controls the AC / DC converter 210 to convert the AC single-phase or three-phase power received from the power source into DC and stores the converted DC in the energy storage unit 220. At this time, the controller 230 may store the power in the energy storing unit 220 only for a predetermined time set in advance according to the user setting. And electric power charges such as late night hours are used to save electricity charges necessary for charging.
에너지 저장부(220)에 저장된 전력은 전술한 바와 같이 에너지 저장부(220)의 저장 용량에 따라 단독모드 또는 부스트모드로 사용된다.The power stored in the energy storage unit 220 is used as a stand-alone mode or a boost mode depending on the storage capacity of the energy storage unit 220, as described above.
제어부(230)는 에너지 저장부(220)를 제어하여 부스트모드 또는 단독모드로 전기 자동차에 전력을 공급한다. 부스트모드와 단독모드의 전력 공급방식은 앞서 설명한 바와 같다.The controller 230 controls the energy storage unit 220 to supply electric power to the electric vehicle in a boost mode or a stand-alone mode. The power supply method of the boost mode and the stand-alone mode is as described above.
제어부(230)는 전기 자동차와 통신을 하며 충전에 필요한 정보를 전달하는데, CAN 통신을 사용하여 이러한 정보를 전달할 수 있다. CAN 통신을 사용하는 경우 전기 자동차에 충전 가능한 정확한 전력량을 전달할 수 있고, 전기 자동차는 이에 따라 할당된 전력만을 충전에 이용할 수 있다. 정확한 전력 정보에 따라 충전을 진행함으로써 전력 공급원으로부터 초과전력을 끌어 쓰거나 신호 차단기가 작동하여 전력 공급이 차단되는 문제를 막을 수 있다.The controller 230 communicates with the electric vehicle and transmits information necessary for charging, and can transmit such information using CAN communication. When CAN communication is used, it is possible to deliver the correct amount of electric power that can be charged to the electric vehicle, and the electric vehicle can use only the electric power thus allocated for charging. By charging according to the exact power information, it is possible to prevent the problem of pulling excess power from the power source or shutting off the power supply by operating the signal breaker.
도 3은 본 발명의 또 다른 어느 실시예에 따른 전기 자동차 충전기의 제어방법의 흐름도이다.3 is a flowchart of a method of controlling an electric vehicle charger according to another embodiment of the present invention.
전기 자동차 충전기는 전력공급원으로부터 공급받은 전력을 직류로 전환하여 에너지 저장 장치에 저장한다(S310).The electric vehicle charger converts the electric power supplied from the electric power source into direct current and stores it in the energy storage device (S310).
저장된 전력을 부스트모드로 공급할 지 단독모드로 공급할 지 판단하여(S320), 부스트모드일 때는 에너지 저장 장치에 저장된 전력을 외부 전력공급원의 전력과 함께 전기 자동차로 전달하고(S330), 단독모드일 때는 에너지 저장 장치에 저장된 전력만 단독으로 전기 자동차로 전달한다(S332).(S320). When the mode is the boost mode, the power stored in the energy storage device is transmitted to the electric vehicle together with the electric power of the external power supply (S330). In the stand-alone mode, Only the electric power stored in the energy storage device is transmitted to the electric vehicle alone (S332).
충전을 위한 전력이 전달될 때 공급되는 전력량을 정확히 전달해야 한다(S340). 전력량을 전달하는 방법은 다양한 차량통신 방법을 통해 가능한데, 앞서 자세히 설명한 바와 같이 CP 신호를 이용하는 경우 PWM 신호의 듀티 사이클 조절을 통해, CAN 통신을 사용하는 경우 CAN 프레임의 데이터를 통해 전기 자동차가 사용할 수 있는 전력량에 대한 정보를 전달할 수 있다.It is necessary to accurately transmit the amount of power supplied when electric power for charging is transmitted (S340). The method of transmitting the electric power is possible through various vehicle communication methods. As described in detail above, when the CP signal is used, the duty cycle of the PWM signal is controlled, and when the CAN communication is used, And can transmit information on the amount of power that is present.
참고로, 본 발명의 일 실시예에 따른 전기 자동차 충전기의 제어 방법은 다양한 컴퓨터 수단을 통하여 수행될 수 있는 프로그램 명령 형태로 구현되어 컴퓨터 판독가능매체에 기록될 수 있다. 상기 컴퓨터 판독가능매체는 프로그램 명령, 데이터 파일, 데이터 구조 등을 단독으로 또는 조합하여 포함할 수 있다. 상기 매체에 기록되는 프로그램 명령은 본 발명을 위하여 특별히 설계되고 구성된 것들이거나 컴퓨터 소프트웨어 당업자에게 공지되어 사용 가능한 것일 수도 있다. For reference, the control method of the electric vehicle charger according to the embodiment of the present invention may be implemented in the form of a program command which can be executed through various computer means and 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. The program instructions recorded on the medium may be those specially designed and constructed for the present invention or may be available to those skilled in the art of computer software.
컴퓨터 판독가능매체의 예에는 하드 디스크, 플로피 디스크 및 자기 테이프와 같은 자기 매체, CD-ROM, DVD와 같은 광기록 매체, 플롭티컬 디스크(floptical disk)와 같은 자기-광 매체, 및 ROM, RAM, 플래시 메모리 등과 같은 프로그램 명령을 저장하고 수행하도록 특별히 구성된 하드웨어 장치가 포함될 수 있다. 프로그램 명령의 예에는 컴파일러에 의해 만들어지는 것과 같은 기계어코드뿐만 아니라 인터프리터 등을 사용해서 컴퓨터에 의해서 실행될 수 있는 고급언어코드를 포함한다. 상술한 하드웨어 장치는 본 발명의 동작을 수행하기 위해 하나 이상의 소프트웨어 모듈로서 작동하도록 구성될 수 있으며, 그 역도 마찬가지이다Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape, optical recording media such as CD-ROMs, DVDs, magneto-optical media such as floptical disks, A hard disk drive, a flash memory, and the like. Examples of program instructions include high-level language code that can be executed by a computer using an interpreter, as well as machine accords such as those produced by a compiler. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa
본 발명의 보호범위가 이상에서 명시적으로 설명한 실시예의 기재와 표현에 제한되는 것은 아니다. 또한, 본 발명이 속하는 기술분야에서 자명한 변경이나 치환으로 말미암아 본 발명이 보호범위가 제한될 수도 없음을 다시 한 번 첨언한다.The scope of protection of the present invention is not limited to the description and the expression of the embodiments explicitly described in the foregoing. It is again to be understood that the present invention is not limited by the modifications or substitutions that are obvious to those skilled in the art.

Claims (3)

  1. 전력공급원으로부터 교류전력을 공급받아 직류로 변환하여 에너지 저장부로 전달하고, 상기 에너지 저장부로부터 공급받은 직류 전력을 교류로 변환하여 전기 자동차에 전달하는 교류/직류 변환기;An AC / DC converter that receives AC power from a power source and converts the DC power into DC power and transfers the DC power to an energy storage unit, converts the DC power supplied from the energy storage unit to AC,
    상기 교류/직류 변환기로부터 변환된 직류 전력을 공급받아 저장해두고 저장해 둔 직류 전력을 상기 교류/직류 변환기에 전달하는 에너지 저장부; 및An energy storage unit for receiving and storing DC power converted from the AC / DC converter and storing the stored DC power to the AC / DC converter; And
    상기 에너지 저장부에 저장된 전력량에 따라 상기 교류/직류 변환기로 전달되는 전력량을 조절하고, 상기 교류/직류 변환기에서 전기 자동차로 전달되는 전력량과 상기 전력공급원에서 전기 자동차로 전달되는 전력량의 합에 따라 전기 자동차로 전달되는 제어신호의 듀티 사이클을 조절하는 제어부를 포함하는 전기 자동차 충전기.DC converter according to the amount of electric power stored in the energy storing unit and controls the amount of electric power to be supplied to the AC / DC converter according to the sum of the amount of electric power delivered to the electric vehicle from the AC / And a control unit for adjusting a duty cycle of the control signal transmitted to the vehicle.
  2. 전력공급원으로부터 교류 전력을 공급받아 직류로 변환하여 전기 자동차 또는 에너지 저장부에 전달하는 교류/직류 변환기;An AC / DC converter that receives AC power from a power source and converts the DC power to DC and transmits the DC power to an electric vehicle or an energy storage unit;
    상기 교류/직류 변환기로부터 변환된 직류 전력을 공급받아 저장해두고 저장해 둔 직류 전력을 전기 자동차에 전달하는 에너지 저장부; 및An energy storage unit for receiving the DC power converted from the AC / DC converter and storing the stored DC power, and delivering the stored DC power to the electric vehicle; And
    상기 에너지 저장부에 저장된 전력량에 따라 전기 자동차로 전달되는 전력량을 조절하고, 상기 에너지 저장부에서 전기 자동차로 전달되는 전력량과 상기 교류/직류 변환기에서 전기 자동차로 전달되는 전력량의 합에 해당하는 전력량 정보를 전기 자동차로 전달되는 제어신호에 포함시켜 전달하는 제어부를 포함하는 전기 자동차 충전기.And a control unit for controlling the amount of electric power delivered to the electric vehicle according to the amount of electric power stored in the energy storage unit and controlling the amount of electric energy corresponding to the sum of the amount of electric power delivered from the energy storage unit to the electric vehicle and the amount of electric energy transmitted from the AC / To the control signal transmitted to the electric vehicle.
  3. 하나이상의 프로세서를 포함하는 전기 자동차 충전기의 제어방법에 있어서:A control method for an electric vehicle charger comprising at least one processor, the control method comprising:
    전력공급원으로부터 공급받은 교류 전력을 직류로 변환하여 에너지 저장 장치에 저장해두고, 전력 공급 모드가 부스트모드인지 판단하여, 부스트모드이면 상기 에너지 저장 장치에 저장된 전력과 전력공급원으로부터 공급받은 전력을 합하여 전기 자동차에 전달하고, 부스트모드가 아니면 상기 에너지 저장 장치에 저장된 전력만 전기 자동차에 전달하고,The AC power supplied from the power supply source is converted into DC and stored in the energy storage device to determine whether the power supply mode is the boost mode or not. In the boost mode, the power stored in the energy storage device and the power supplied from the power supply source, If the mode is not the boost mode, only the electric power stored in the energy storage device is transmitted to the electric vehicle,
    상기 전기 자동차에 전달되는 전력량에 대한 정보를 상기 전기 자동차로 전달되는 제어신호에 포함시켜 전달하는 전기 자동차 충전기의 제어방법.Wherein the information about the amount of electric power delivered to the electric vehicle is included in a control signal transmitted to the electric vehicle and is transmitted.
PCT/KR2018/011938 2017-10-11 2018-10-11 Electric vehicle charger using energy storage system WO2019074287A1 (en)

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KR102251890B1 (en) * 2019-09-19 2021-05-14 디티아이코리아(주) Integrated charging system for personal mobility
JP7374231B2 (en) 2021-07-29 2023-11-06 寧徳時代新能源科技股▲分▼有限公司 Charging and discharging devices, battery charging and discharging methods, and charging and discharging systems

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JP2013070540A (en) * 2011-09-25 2013-04-18 Denso Corp Charger
KR101304192B1 (en) * 2012-03-26 2013-09-05 재단법인 전북자동차기술원 Battery charging system of wrecker for electric vehicle
KR20130119808A (en) * 2012-04-24 2013-11-01 엘에스산전 주식회사 Apparatus for charging battery of electric vehicle using estimation of load
KR20140009822A (en) * 2012-07-13 2014-01-23 엘에스산전 주식회사 Charging apparatus for electric vehicle
JP2016214014A (en) * 2015-05-13 2016-12-15 株式会社キューヘン Quick charger

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Publication number Priority date Publication date Assignee Title
JP2013070540A (en) * 2011-09-25 2013-04-18 Denso Corp Charger
KR101304192B1 (en) * 2012-03-26 2013-09-05 재단법인 전북자동차기술원 Battery charging system of wrecker for electric vehicle
KR20130119808A (en) * 2012-04-24 2013-11-01 엘에스산전 주식회사 Apparatus for charging battery of electric vehicle using estimation of load
KR20140009822A (en) * 2012-07-13 2014-01-23 엘에스산전 주식회사 Charging apparatus for electric vehicle
JP2016214014A (en) * 2015-05-13 2016-12-15 株式会社キューヘン Quick charger

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