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KR102258306B1 - Electric vehicle charging system using energy storage system - Google Patents

Electric vehicle charging system using energy storage system Download PDF

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Publication number
KR102258306B1
KR102258306B1 KR1020200086107A KR20200086107A KR102258306B1 KR 102258306 B1 KR102258306 B1 KR 102258306B1 KR 1020200086107 A KR1020200086107 A KR 1020200086107A KR 20200086107 A KR20200086107 A KR 20200086107A KR 102258306 B1 KR102258306 B1 KR 102258306B1
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South Korea
Prior art keywords
electric vehicle
charging
charger
battery
discharger
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KR1020200086107A
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Korean (ko)
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조성신
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주식회사 에스피엠
조성신
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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
    • B60L53/50—Charging stations characterised by energy-storage or power-generation means
    • B60L53/53—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
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
    • 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
    • B60L53/24—Using the vehicle's propulsion converter for charging
    • 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
    • B60L55/00—Arrangements for supplying energy stored within a vehicle to a power network, i.e. vehicle-to-grid [V2G] arrangements
    • 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
    • B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
    • 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
    • B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
    • 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
    • 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
    • Y02T90/12—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

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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

An objective of the present invention is to provide an electric vehicle (EV) charging system using an energy storage system, which can connect an energy storage system for electric vehicle chargers consisting of a plurality of simultaneously rechargeable battery racks to a plurality of electric vehicles in a power network connected to previously installed electric vehicle chargers to charge the energy storage system for electric vehicle chargers in times when the electric vehicle chargers are not used, thereby simultaneously charging a plurality of electric vehicles through power charged in the energy storage system for electric vehicle chargers without separately expanding the power network to extend the energy storage system for electric vehicle chargers without power network expansion. To achieve the objective, the electric vehicle charging system using an energy storage system comprises: a charger/discharger receiving power from a grid or an electric vehicle (EV) charger among the grid, which is a power network supplying general alternating current (AC) power, and the electric vehicle (EV) charger charging electric vehicles by converting AC power from the grid, which is the power network, into direct current power so as to charge a battery rack, and charging another electric vehicle simultaneously or separately from the electric vehicle (EV) charger by direct current power charged in the battery rack; the battery rack consisting of a plurality of batteries to receive direct current power from the charger/discharger to store the direct current power; and an energy storage system monitoring, controlling, and analyzing the energy usage situation of the battery rack in real time to control the charging/discharging electric energy of the battery rack from the charger/discharger, and controlling charging for the battery rack through the charger/discharger depending on whether the electric vehicle charger is used or unused.

Description

에너지저장시스템을 이용한 전기자동차 충전시스템{Electric vehicle charging system using energy storage system}Electric vehicle charging system using energy storage system

본 발명은 에너지저장시스템을 전기자동차 충전기에 이용할 수 있는 에너지저장시스템을 이용한 전기자동차 충전시스템에 관한 것으로, 더욱 상세하게는 기존에 설치된 전기자동차 충전기에 연결되는 전력망에 복수의 전기자동차에 동시에 충전이 가능한 전기자동차 충전기용 에너지저장시스템을 연결하여 기존 전기자동차 충전기의 미사용시간에 충전하여 두고 이를 통해 별도의 전력망 확장없이도 전기자동차 충전기용 에너지저장시스템에 충전된 전력을 통해 복수의 전기자동차를 동시에 충전할 수 있도록 한 에너지저장시스템을 이용한 전기자동차 충전시스템에 관한 것이다. The present invention relates to an electric vehicle charging system using an energy storage system that can use the energy storage system for an electric vehicle charger, and more particularly, to simultaneously charge a plurality of electric vehicles in a power grid connected to an existing electric vehicle charger. It is possible to connect the energy storage system for an electric vehicle charger and charge it during the unused time of the existing electric vehicle charger, and through this, a plurality of electric vehicles can be simultaneously charged through the power charged in the electric vehicle charger energy storage system without a separate power grid expansion. It relates to an electric vehicle charging system using an energy storage system that enables

전기자동차(EV, Electric Vehicle)는 석유 연료와 엔진을 사용하지 않고 전기 배터리와 전기 모터를 사용하는 자동차를 의미한다. 전기자동차는 배터리와 전기 모터로만 주행하는 순수 전기자동차(EV), 하이브리드 전기자동차(HEV, Hybrid Electric Vehicle), 플러그인 하이브리드 전기자동차(PHEV, Plug-in Hybrid Electric Vehicle)가 연구 개발되고 있다.An electric vehicle (EV) refers to a vehicle that uses an electric battery and an electric motor without using petroleum fuel and an engine. As for electric vehicles, pure electric vehicles (EVs), hybrid electric vehicles (HEVs), and plug-in hybrid electric vehicles (PHEVs) that operate only with batteries and electric motors are being researched and developed.

플러그인 하이브리드 전기자동차(PHEV, Plug-in Hybrid Electric Vehicle)는 전기자동차의 짧은 주행거리와 높은 가격을 해결하는 대안으로 개발된 전기 모터/배터리 및 내부 연소 엔진을 사용하며 전기에너지를 배터리에 충전시켜 사용하고, 자동차의 에너지 사용에서 가솔린 연료를 사용한다.A plug-in hybrid electric vehicle (PHEV) uses an electric motor/battery and an internal combustion engine developed as an alternative to solving the short mileage and high price of electric vehicles, and uses electric energy by charging the battery. and gasoline fuel is used in the energy use of automobiles.

전기자동차는 기본적으로 화석 연료를 사용하는 자동차 엔진을 동력원으로 이용하지 않으며, 배터리, 울트라 커패시터(Ultra Capacitor), 교류를 직류 전압으로 변환하는 인버터(inverter), 모터(Motor)를 회전시켜 변속기(Transmission)를 구동하여 자동차의 바퀴를 구동시키며, 인버터는 DC-DC 컨버터와 연결되어 전자 제어 장치(ECU, Electronic Control Unit)에 DC 전압을 공급하고, ECU는 조향 상태를 조절하는 전자식 파워 스티어링 시스템(EPS, Electronic Power Steering)와 연동되고 액츄에이터(actuator), 브레이크(brake)와 연결되며, 자동변속기, ABS(Anti-lock brake system)의 상태를 전자적으로 제어한다.Electric vehicles basically do not use a fossil fuel-powered automobile engine as a power source, but a battery, an ultra-capacitor, an inverter that converts alternating current to direct voltage, and a motor that rotates a transmission. ) to drive the wheels of the car, the inverter is connected to the DC-DC converter to supply DC voltage to the Electronic Control Unit (ECU), and the ECU controls the steering status of the Electronic Power Steering System (EPS). , Electronic Power Steering), it is connected to an actuator and a brake, and electronically controls the state of an automatic transmission and ABS (Anti-lock brake system).

전기자동차 배터리는 예컨대, 리튬 전지를 사용하고 400V 구동 배터리와 12V 보조 배터리로 장착될 수 있다. 최근 양산되어 시장에 보급되는 전기자동차의 경우 1회 완전 충전시에 최대 350km 주행이 가능(예를 들어, 쉐보레볼트 EV의 경우)하나 이는 차량의 종류에 따라 크게 차이가 난다. 전기자동차 내 사용자의 편의를 위한 다양한모듈/장치들은 구동시 전력을 소모하기 때문에 전기자동차의 주행 거리에 영향을 줄 수 있다.The electric vehicle battery may use, for example, a lithium battery and be equipped with a 400V driving battery and a 12V auxiliary battery. In the case of electric vehicles mass-produced and distributed in the market recently, it is possible to travel up to 350 km on a single full charge (for example, in the case of the Chevrolet Volt EV), but this differs greatly depending on the type of vehicle. Various modules/devices for the user's convenience in the electric vehicle consume power during operation, which may affect the driving distance of the electric vehicle.

한편, 전기자동차의 경우 구동시 배터리가 방전되기 때문에 정기적으로 충전을 해야한다. 충전 시간은 완충전기를 사용시 4 내지 9시간, 급속 충전시 30분 내지 1시간이 소요되는 것으로 알려져 있으며, 배터리 기술의 발전에 따라 완속 충전 또는 급속 충전 속도가 개선되고 있다. On the other hand, in the case of an electric vehicle, since the battery is discharged during operation, it must be charged regularly. It is known that the charging time takes 4 to 9 hours when using a full-charger, and 30 minutes to 1 hour when fast charging, and the slow charging or rapid charging speed is improving according to the development of battery technology.

전기자동차 충전기는 충전 케이블을 전기자동차의 충전 단자에 연결하여 전기 에너지를 충전시키는 기능을 제공하며, 통상적으로 고속 또는 저속 충전 타입을 지원한다. An electric vehicle charger provides a function of charging electric energy by connecting a charging cable to a charging terminal of an electric vehicle, and generally supports a high-speed or low-speed charging type.

최근 들어, 전기자동차 시장이 급성장하고 있으나, 아직까지 충전 인프라가 부족한 실정이다. 따라서, 전기자동차의 충전 인프라를 공급하면서, 전기자동차의 충전을 종합적으로 관리할 수 있는 관리 시스템을 필요로 한다.In recent years, the electric vehicle market is growing rapidly, but the charging infrastructure is still insufficient. Accordingly, there is a need for a management system that can comprehensively manage charging of electric vehicles while supplying charging infrastructure for electric vehicles.

참고로 도 1은 종래 기술에 따른 전기자동차 충전시스템을 나타낸 도면이다.For reference, FIG. 1 is a view showing an electric vehicle charging system according to the related art.

이러한 종래 전기자동차 충전 시스템은 전력망인 GRID에 전기자동차용 충전기가 연결되고, 전기자동차용 충전기를 통해 전기자동차(EV 차량)이 충전하도록 되어 있다. In this conventional electric vehicle charging system, a charger for an electric vehicle is connected to the GRID, which is a power grid, and an electric vehicle (EV vehicle) is charged through the charger for the electric vehicle.

이러한 구조는 일반적으로 공용 주차장, 대형마트, 백화점 및 아파트 단지내의 주차장에 설치되어 기본적으로 1대 내지 3대 정도만 동시에 충전할 수 있는 충전기가 설치되어 있으나 최근 전기자동차가 점차로 늘어나는 추세에서는 계속해서 전기자동차용 충전기를 추가해야 하는데, 그와 같은 경우 공용 주차장, 대형마트, 백화점 및 아파트 단지내에 전기 수전용량을 증대하여야 하고, 이는 변압기의 증설, 전기안전기구의 교체나 사양 변경 등의 추가 공사비용이 막대할 것으로 예상된다. 특히 기존 전기자동차 충전기의 단점은 부하율이 매우 적다는 것을 들 수 있는데, 이는 사용시간(전기자동차를 충전하는 시간)보다는 대기시간이 매우 많다는 것이다. 특히 사용자는 출근 또는 퇴근 후 차에 충전기를 꽂은 채로 일을 보거나, 귀가 하므로 충전이 완료되어도 장시간 방치되어 충전기 이용률이 매우 낮다는 문제도 있었다.This structure is generally installed in public parking lots, large marts, department stores and parking lots in apartment complexes, and basically only 1 to 3 chargers are installed at the same time. In such a case, the electric power receiving capacity must be increased in public parking lots, large marts, department stores, and apartment complexes, which incurs additional construction costs such as expansion of transformers, replacement of electrical safety devices or specification changes. expected to do In particular, the disadvantage of the existing electric vehicle charger is that the load factor is very small, which is that the standby time is much longer than the use time (the time to charge the electric vehicle). In particular, there is a problem that the use rate of the charger is very low because the user goes to work or goes home with the charger plugged into the car after going to work or after work, so that the charger is left unattended for a long time even after charging is completed.

특허문헌 1 : 대한민국 공개특허 10-2012-0086388 - 부하평준화 기능을 가진 전기자동차 급속충전기Patent Document 1: Republic of Korea Patent Publication No. 10-2012-0086388 - Electric vehicle fast charger with load leveling function 특허문헌 2 : 대한민국 공개특허 10-2012-0021708호 - 전기자동차 충전인프라 관리시스템Patent Document 2: Republic of Korea Patent Publication No. 10-2012-0021708 - Electric vehicle charging infrastructure management system 특허문헌 3 : 대한민국 등록특허 10-1870285호 - 전기자동차의 연속적 충전을 위한 시스템 및 방법Patent Document 3: Republic of Korea Patent Registration No. 10-1870285 - System and method for continuous charging of electric vehicle 특허문헌 4 : 대한민국 등록특허 10-1665485호 - ISO/IEC12139-1 전력선 통신을 이용한 전기자동차와 충전시스템 간의 신호 세기 측정 방법Patent Document 4: Republic of Korea Patent Registration No. 10-1665485 - ISO/IEC12139-1 Method for measuring signal strength between electric vehicle and charging system using power line communication

따라서, 본 발명은 상기와 같은 종래 기술의 제반 단점과 문제점을 해결하기 위한 것으로, 기존에 설치된 전기자동차 충전기에 연결되어 있는 전력망에 복수의 전기자동차에 동시에 충전이 가능한 복수의 배터리 랙으로 이루어진 전기자동차 충전기용 에너지저장시스템을 연결하여 전기자동차 충전기의 미사용시간에 전기자동차 충전기용 에너지저장시스템을 충전하고, 이를 통해 별도의 전력망 확장없이도 전기자동차 충전기용 에너지저장시스템에 충전된 전력을 통해 복수의 전기자동차를 동시에 충전할 수 있도록 함으로써 전력망 확장없이도 전기자동차 충전시스템을 확대할 수 있는 에너지저장시스템을 이용한 전기자동차 충전시스템을 제공하는데 그 목적이 있다. Accordingly, the present invention is to solve the various disadvantages and problems of the prior art as described above, and an electric vehicle comprising a plurality of battery racks capable of simultaneously charging a plurality of electric vehicles in a power grid connected to an electric vehicle charger installed in the prior art. By connecting the energy storage system for the charger, the energy storage system for the electric vehicle charger is charged during the non-use time of the electric vehicle charger. An object of the present invention is to provide an electric vehicle charging system using an energy storage system that can expand the electric vehicle charging system without expanding the electric power grid by allowing the electric vehicle to be charged at the same time.

상기한 목적을 달성하기 위하여 본 발명은 교류전원을 공급하는 전력망인 GRID와, 전력망인 GRID로부터 AC 전원을 직류전원으로 변환하여 전기자동차를 충전하는 전기자동차(EV) 충전기 중 GRID 또는 전기자동차 충전기로부터 전원을 공급받아 배터리 랙을 충전하고, 배터리 랙에 충전된 직류전원으로 전기자동차(EV) 충전기와 동시에 또는 별도로 다른 전기자동차를 충전하는 충방전기; 다수의 배터리로 구성되어 충방전기로부터 직류전원을 공급받아 저장하는 배터리 랙; 및 충방전기로부터 배터리 랙의 충방전 전력량을 제어하기 위하여 배터리 랙의 에너지 사용현황을 실시간으로 모니터링, 제어 및 분석하고, 전기자동차 충전기의 사용, 미사용에 따라 충방전기를 통해 배터리 랙에 대한 충전을 제어하는 에너지저장시스템;을 포함하여 구성됨을 특징으로 하는 에너지저장시스템을 이용한 전기자동차 충전시스템을 제공한다.In order to achieve the above object, the present invention is from GRID or an electric vehicle charger among electric vehicle (EV) chargers for charging an electric vehicle by converting AC power from GRID, which is a power grid, and GRID, which is a power grid, to DC power. Charger/discharger for charging the battery rack by receiving power, and charging other electric vehicles simultaneously or separately with the electric vehicle (EV) charger with the DC power charged in the battery rack; a battery rack configured to receive and store DC power from a charger/discharger composed of a plurality of batteries; And to control the amount of charge/discharge power of the battery rack from the charger/discharger, it monitors, controls and analyzes the energy usage status of the battery rack in real time, and controls the charging of the battery rack through the charger/discharger according to the use or non-use of the electric vehicle charger. It provides an electric vehicle charging system using an energy storage system, characterized in that it comprises a;

본 발명의 충방전기는, 배터리 랙의 복수의 배터리의 상태 감지 및 배터리 제어 운영을 관리하여 배터리에 최상의 컨디션을 제공하기 위하여 배터리 상태에 따른 개별충전방식을 통해 불량 배터리를 감지하는 것을 특징으로 한다.The charger/discharger of the present invention is characterized in that it detects a defective battery through an individual charging method according to the state of the battery in order to provide the best condition to the battery by managing the state detection and battery control operation of a plurality of batteries in the battery rack.

본 발명의 전기자동차 충전기용 에너지저장시스템은, GRID와 충방전기 또는 전기자동차(EV) 충전기와 충방전기 사이에 구성되어, 전기자동차 충전기가 전기자동차의 충전시 오프되며, 전기자동차 충전기의 미사용시간에 온되어 배터리 랙의 배터리를 충전하는 제1스위치인 리미트 스위치와, 충방전기와 배터리 랙 사이에 구성된 에너지저장시스템용 스위치인 제2스위치(BPU : Battery Protection Unit)를 더 포함하여 구성됨을 특징으로 한다.The energy storage system for an electric vehicle charger of the present invention is configured between a GRID and a charger/discharger or an electric vehicle (EV) charger and a charger and discharger. It is characterized in that it is configured to further include a limit switch which is a first switch to charge the battery of the battery rack, and a second switch (BPU: Battery Protection Unit) which is a switch for an energy storage system configured between the charger and discharger and the battery rack. .

또한 본 발명의 충방전기는, GRID로부터 전원 공급시 AC/DC 컨버팅하여 배터리 랙에 충전하기 위한 AC/DC 컨버터가 구성되거나, 전기자동차(EV) 충전기로부터 전원 공급 시 DC/DC 컨버팅하여 배터리 팩에 충전하기 위한 DC/DC 컨버터가 구성됨을 특징으로 한다.In addition, the charger/discharger of the present invention is configured with an AC/DC converter for charging in a battery rack by AC/DC conversion when power is supplied from GRID, or DC/DC converting when power is supplied from an electric vehicle (EV) charger to a battery pack A DC/DC converter for charging is configured.

그리고 본 발명의 충방전기는 배터리 랙의 용량에 따라 복수의 전기 자동차를 동시에 충전하는 것을 특징으로 한다.And the charger/discharger of the present invention is characterized in that it simultaneously charges a plurality of electric vehicles according to the capacity of the battery rack.

본 발명의 실시 예에 따르면 다음과 같은 효과가 있다.According to an embodiment of the present invention, the following effects are obtained.

첫째, 전기자동차가 증가됨에 따라 기존에 전기자동차 충전기와는 별도로 기존과 동일내지 유사한 전기자동차 충전기를 설치하기 위하여, 즉 수전용량을 증대하기 위해서는 변압기의 증설이나 전기안전기구의 교체 사양 변경 등의 막대한 공사비용의 추가없이 복수의 전기자동차에 대한 동시 충전이 가능한 배터리 랙으로 이루어진 충전기용 에너지저장시스템을 기존 전력망에 연결하고, 기존 전기자동차 충전기의 미사용 시간에 에너지저장시스템에 충전하고 이를 통해 복수의 전기자동차에 동시 충전도 가능한 효과가 있다.First, as the number of electric vehicles increases, in order to install the same or similar electric vehicle charger as the existing one separately from the existing electric vehicle charger, that is, in order to increase the power receiving capacity, there is a huge amount of The energy storage system for chargers, which consists of a battery rack that can charge multiple electric vehicles simultaneously without adding construction cost, is connected to the existing power grid, and the energy storage system is charged during the unused time of the existing electric vehicle chargers. Simultaneous charging of the car is also possible.

둘째, 경부하 시간(특히 심야전기를 이용한 충전)에 미리 충전할 수 있어 건축물에 추가로 전기자동차 충전기를 설치하는 경우 발생할 수 있는 피크(Peak) 전력 상승에 따른 전기세 상승 문제를 해결할 수 있다.Second, it can be charged in advance during light load time (especially charging using late-night electricity), so it is possible to solve the problem of an increase in electricity bills due to a peak power increase that may occur when an additional electric vehicle charger is installed in a building.

셋째, 전기자동차용 배터리를 충전하는 충전시스템이므로 대용량 에너지저장시스템보다 상대적으로 작게 구성할 수 있어 기존 주차장의 여유공간에 설치할 수 있고, 전기자동차 충전기를 새롭게 추가하여야 하는 것에 비해 작업공정이 단순하다.Third, since it is a charging system for charging an electric vehicle battery, it can be configured relatively smaller than a large-capacity energy storage system, so it can be installed in the free space of an existing parking lot, and the work process is simple compared to the need to add a new electric vehicle charger.

도 1은 종래 기술에 따른 전기자동차 충전 시스템을 설명하기 위한 도면이다..
도 2는 본 발명 제1실시예에 따른 에너지저장시스템을 이용한 전기자동차 충전시스템을 설명하기 위한 도면이다.
도 3은 도 2에 나타낸 에너지저장시스템을 이용한 전기자동차 충전시스템에서 복수의 전기자동차를 충전하는 예을 설명하기 위한 도면이다.
도 4는 도 2에 나타낸 에너지저장시스템을 이용한 전기자동차 충전시스템에서 충방전기의 제1실시예를 설명하기 위한 블록 구성도이다.
도 5는 본 발명 제2실시예에 따른 에너지저장시스템을 이용한 전기자동차 충전시스템을 설명하기 위한 도면이다.
도 6은 도 5에 나타낸 에너지저장시스템을 이용한 전기자동차 충전시스템에서 충방전기의 제2실시예를 설명하기 위한 블록 구성도이다.
도 7은 도 5에 나타낸 에너지저장시스템을 이용한 전기자동차 충전시스템에서 충방전기의 제2실시예를 설명하기 위한 블록 구성도이다.
도 8는 본 발명에 따른 에너지저장시스템을 이용한 전기자동차 충전시스템의 설치예를 나타낸 도면이다.
도 9는 본 발명에 따른 에너지저장시스템을 이용한 전기자동차 충전시스템의 운용방법의 실시예를 설명하기 위한 흐름도이다.1 is a view for explaining an electric vehicle charging system according to the prior art.
2 is a view for explaining an electric vehicle charging system using an energy storage system according to a first embodiment of the present invention.
FIG. 3 is a view for explaining an example of charging a plurality of electric vehicles in the electric vehicle charging system using the energy storage system shown in FIG. 2 .
FIG. 4 is a block diagram illustrating a first embodiment of a charger/discharger in an electric vehicle charging system using the energy storage system shown in FIG. 2 .
5 is a view for explaining an electric vehicle charging system using an energy storage system according to a second embodiment of the present invention.
FIG. 6 is a block diagram illustrating a second embodiment of a charger/discharger in an electric vehicle charging system using the energy storage system shown in FIG. 5 .
FIG. 7 is a block diagram illustrating a second embodiment of a charger/discharger in an electric vehicle charging system using the energy storage system shown in FIG. 5 .
8 is a view showing an example of installation of an electric vehicle charging system using an energy storage system according to the present invention.
9 is a flowchart for explaining an embodiment of a method for operating an electric vehicle charging system using an energy storage system according to the present invention.

본 명세서 및 청구범위에 사용된 용어나 단어는 통상적이거나 사전적인 의미로 한정하여 해석되어서는 아니 되며, 발명자는 자신의 발명을 가장 최선의 방법으로 설명하기 위해 용어의 개념을 적절하게 정의할 수 있다는 원칙에 입각하여 본 발명의 기술적 사상에 부합하는 의미와 개념으로 해석되어야만 하고, 본 명세서에 기재된 실시예와 도면에 도시된 구성은 본 발명의 가장 바람직한 일 실시 예에 불과할 뿐이므로 본 발명의 기술적 사상을 모두 대변하는 것으로 보아서는 아니 되며, 다양한 균등물과 변형 예들이 있을 수 있음을 이해하여야 한다.The terms or words used in the present specification and claims should not be construed as being limited to conventional or dictionary meanings, and the inventor can properly define the concept of the term in order to best describe his invention. Based on the principle, it should be interpreted as meaning and concept consistent with the technical spirit of the present invention, and the embodiments described in the present specification and the configurations shown in the drawings are only the most preferred embodiment of the present invention, so the technical spirit of the present invention It should not be construed as representing all of them, and it should be understood that there may be various equivalents and modifications.

이하, 첨부된 도면을 참조하여 본 발명에 관한 전기자동차 충전기용 에너지저장시스템의 바람직한 실시 예를 상세히 설명하기로 한다.Hereinafter, a preferred embodiment of an energy storage system for an electric vehicle charger according to the present invention will be described in detail with reference to the accompanying drawings.

도 2는 본 발명 제1실시예에 따른 에너지저장시스템을 이용한 전기자동차 충전시스템을 설명하기 위한 도면이고, 도 3은 도 2에 나타낸 에너지저장시스템을 이용한 전기자동차 충전시스템에서 복수의 전기자동차를 충전하는 예을 설명하기 위한 도면이며, 도 4는 도 2에 나타낸 에너지저장시스템을 이용한 전기자동차 충전시스템에서 충방전기의 제1실시예를 설명하기 위한 블록 구성도이다.FIG. 2 is a view for explaining an electric vehicle charging system using an energy storage system according to a first embodiment of the present invention, and FIG. 3 is a diagram for charging a plurality of electric vehicles in the electric vehicle charging system using the energy storage system shown in FIG. FIG. 4 is a block diagram for explaining a first embodiment of a charger/discharger in an electric vehicle charging system using the energy storage system shown in FIG. 2 .

본 발명 제1실시예에 따른 에너지저장시스템을 이용한 전기자동차 충전시스템은 도 2 내지 도 4에 나타낸 바와 같이, GRID(100), 전기자동차(EV) 충전기(200), 충방전기(300), 배터리 랙(400), 제1스위치(LS)(500), 제2스위치(BPU)(600) 및 에너지관리시스템(EMS)(700)을 포함하여 구성된다.As shown in FIGS. 2 to 4, the electric vehicle charging system using the energy storage system according to the first embodiment of the present invention is a GRID 100, an electric vehicle (EV) charger 200, a charger/discharger 300, and a battery. It is configured to include a rack 400, a first switch (LS) 500, a second switch (BPU) 600 and an energy management system (EMS) (700).

여기서 GRID(100)는 일반교류전원을 공급하는 전력망이다.Here, the GRID 100 is a power grid that supplies general AC power.

전기자동차(EV) 충전기(200)는 전력망인 GRID로부터 AC 전원을 직류전원으로 변환하여 전기자동차 A를 충전한다.The electric vehicle (EV) charger 200 converts AC power from GRID, which is a power grid, into DC power to charge the electric vehicle A.

충방전기(300)는 전기자동차 충전기(200)로부터 변환된 직류전원을 공급받아 배터리 랙(400)을 충전하고, 배터리 랙(400)에 충전된 직류전원으로 전기자동차 B를 충전(전기자동차 B로 방전)한다. 즉 본 발명 충방전기(300)는 배터리 랙(400)에 충전된 직류전원으로 전기자동차(EV) 충전기(200)와 동시 또는 별도로 다른 전기자동차를 충전할 수 있다. 이는 전기자동차가 증가됨에 따라 기존에 전기자동차 충전기와는 별도로 기존과 동일내지 유사한 전기자동차 충전기를 설치하기 위하여, 즉 수전용량을 증대하기 위해서는 변압기의 증설이나 전기안전기구의 교체 사양 변경 등의 막대한 공사비용의 추가없이 복수의 전기자동차에 대한 동시 충전이 가능한 배터리 랙으로 이루어진 충전기용 에너지저장시스템을 기존 전력망이나 전기자동차 충전기(200)에 전기적으로 연결하고, 기존 전기자동차 충전기의 미사용 시간에 에너지저장시스템에 충전하고, 이를 통해 복수의 전기자동차에 동시 충전도 가능해진다.The charger/discharger 300 receives the DC power converted from the electric vehicle charger 200 to charge the battery rack 400, and charges the electric vehicle B with the DC power charged in the battery rack 400 (to the electric vehicle B). discharge). That is, the present invention charger 300 can charge other electric vehicles simultaneously or separately with the electric vehicle (EV) charger 200 with the DC power charged in the battery rack 400 . As the number of electric vehicles increases, in order to install the same or similar electric vehicle charger as the existing one separately from the existing electric vehicle charger, that is, to increase the power receiving capacity, it is a huge construction work such as extending a transformer or changing the replacement specification of an electric safety device. An energy storage system for a charger consisting of a battery rack capable of simultaneously charging a plurality of electric vehicles without additional cost is electrically connected to the existing power grid or the electric vehicle charger 200, and the energy storage system is used when the existing electric vehicle charger is not in use. , which enables simultaneous charging of multiple electric vehicles.

이를 위하여 충방전기(300)는 배터리 랙(400)의 배터리 A 내지 N(배터리 팩 A 내지 N)의 상태 감지 및 배터리 제어 운영을 관리하여 배터리에 최상의 컨디션을 제공하기 위한 것으로, 에너지저장시스템(ESS)의 배터리관리시스템(BMS)의 기능과 유사하게 배터리 상태에 따른 개별충전방식을 통해 배터리 수명을 극대화하도록 하여 배터리 교체 주기를 연장시키며, 불량 배터리를 감지하는 것으로 기능을 수행한다. To this end, the charger 300 is to provide the best condition to the battery by managing the state detection and battery control operation of the batteries A to N (battery packs A to N) of the battery rack 400, and the energy storage system (ESS) ), it extends the battery replacement cycle by maximizing the battery life through an individual charging method according to the battery condition, similar to the function of the battery management system (BMS), and performs the function by detecting a bad battery.

배터리 랙(400)은 다수의 배터리 A 내지 N(배터리 팩 A 내지 N)으로 구성되어 충방전기(300)로부터 직류전원을 공급받아 저장한다. 참고로 배터리 랙은 수많은 셀로 이루어져 있는데 이러한 셀(cell)이 모여 모듈(module)이 되고, 모듈이 모여 팩(pack)이 되며, 이 팩이 모여 랙(RACK)이 된다. The battery rack 400 is composed of a plurality of batteries A to N (battery packs A to N) and receives and stores DC power from the charger/discharger 300 . For reference, a battery rack consists of numerous cells, and these cells are collected to form a module, modules are gathered to form a pack, and these packs are collected to form a rack.

제1스위치(LS)(500)는 전기자동차(EV) 충전기(200)와 충방전기(300) 사이에 구성되는 리미트 스위치(Limit Switch)로 전기자동차 충전기(200)가 전기자동차 A의 충전시 스위치를 오프하며, 전기자동차 충전기(200)의 미사용시간에 스위치를 온하여 배터리 랙(400)이 충전되도록 한다.The first switch (LS) 500 is a limit switch configured between the electric vehicle (EV) charger 200 and the charge/discharger 300, and the electric vehicle charger 200 is a switch when the electric vehicle A is charged. is turned off, and the battery rack 400 is charged by turning on the switch in the non-use time of the electric vehicle charger 200 .

제2스위치(BPU : Battery Protection Unit)(600)는 충방전기(300)와 배터리 랙(400) 사이에 구성된 에너지저장시스템용 스위치이다.The second switch (BPU: Battery Protection Unit) 600 is a switch for an energy storage system configured between the charger and discharger 300 and the battery rack 400 .

에너지관리시스템(EMS)(700)은 충방전기(300)로부터 배터리 랙(400)의 충방전 전력량을 제어하기 위하여 배터리 랙(400)의 에너지 사용현황을 실시간으로 모니터링, 제어 및 분석한다. 또한 전기자동차 충전기(200)의 사용, 미사용에 따라 충방전기(300)를 통해 제1스위치(500)를 제어하여 배터리 랙(400)에 대한 충전을 제어한다.The energy management system (EMS) 700 monitors, controls and analyzes the energy usage status of the battery rack 400 in real time in order to control the amount of charge/discharge power of the battery rack 400 from the charge/discharger 300 . In addition, according to the use or non-use of the electric vehicle charger 200, the first switch 500 is controlled through the charger/discharger 300 to control the charging of the battery rack 400.

한편 충방전기(300)는 배터리 랙(400)의 용량에 따라 복수의 전기 자동차 B 내지 N을 동시에 충전할 수도 있는 것을 도 3을 통해 나타내고 있다.On the other hand, the charger 300 is shown through Figure 3 that may simultaneously charge a plurality of electric vehicles B to N according to the capacity of the battery rack (400).

이러한 충방전기(300)의 실시예는 도 4에 나타낸 바와 같이, 내부통신부(310), 외부통신부(320), 배터리충전부(DC/DC 컨버터)(330), 배터리방전부(EV 충전부)(340), 터치스크린부(350), 카드인식부(360), 메모리부(370), 센싱부(380) 및 제어부(390)를 포함하여 구성된다.As shown in FIG. 4 , the embodiment of the charger/discharger 300 includes an internal communication unit 310 , an external communication unit 320 , a battery charging unit (DC/DC converter) 330 , and a battery discharging unit (EV charging unit) 340 . ), a touch screen unit 350 , a card recognition unit 360 , a memory unit 370 , a sensing unit 380 and a control unit 390 .

여기서 내부통신부(310)는 에너지 관리 시스템(EMS)와 충방전기(300)간 통신한다.Here, the internal communication unit 310 communicates between the energy management system (EMS) and the charger/discharger 300 .

외부통신부(320)는 전기자동차 이용자가 자신의 전기자동차를 충방전기(300)를 통해 충전시 충전 완료 시나 충전에 문제가 발생한 경우(예로써 접촉불량)나, 배터리 랙(400)의 배터리 부족 등의 경우에 전기자동차 이용자가 스마트폰 번호를 등록한 경우 해당 스마트폰으로 문자메시지를 전송한다. 이를 위하여 외부통신부(320)는 주변의 AP(Access Point)와 연결되는 WiFi나, 이동통신이 가능한 이동통신망(4G, 5G 등)과 연결된다. The external communication unit 320 is when an electric vehicle user charges his/her electric vehicle through the charger/discharger 300, when charging is complete or when a problem occurs in charging (eg, poor contact), battery shortage of the battery rack 400, etc. In this case, if the electric vehicle user has registered a smartphone number, a text message is sent to the corresponding smartphone. To this end, the external communication unit 320 is connected to a WiFi connected to a neighboring AP (Access Point) or a mobile communication network (4G, 5G, etc.) capable of mobile communication.

배터리충전부(DC/DC 컨버터)(330)는 전기자동차 충전기(200) 사용시(전기자동차 A 충전시)에는 개방(Open) 상태에서 전기자동차 충전기(200) 미사용시에는 단락(Short)(스위치 온)되면 전기자동차 충전기(200)로부터 DC 전원을 공급받아 배터리 랙(400)의 배터리 충전에 적합한 충전전압으로 컨버팅하여 충전한다. The battery charging unit (DC/DC converter) 330 is in an open state when the electric vehicle charger 200 is used (when charging electric vehicle A), and is short (switched on) when the electric vehicle charger 200 is not used. When the DC power is supplied from the electric vehicle charger 200, it is converted into a charging voltage suitable for charging the battery of the battery rack 400 and charged.

배터리방전부(EV 충전부)(340)는 충방전기(300)에 전기자동차가 충전을 요청하면 배터리 랙(400)의 배터리에 충전된 충전전압을 충전을 요청한 전기자동차로 공급하여 충전한다. 이에 따라 해당 배터리는 충전량만큼 방전된다. The battery discharge unit (EV charging unit) 340 is charged by supplying the charging voltage charged in the battery of the battery rack 400 to the electric vehicle requesting charging when the electric vehicle requests charging to the charger and discharger 300 . Accordingly, the corresponding battery is discharged by the amount of charge.

터치스크린부(350)는 전기자동차 이용자가 충전을 요청하거나, 자신의 스마트폰번호를 입력시키는데 이용된다.The touch screen unit 350 is used for the electric vehicle user to request charging or input his/her smartphone number.

카드인식부(360)는 전가자동차 이용자의 충전카드(신용카드, 현금카드 또는 충전전용 카드) 등을 인식한다.The card recognition unit 360 recognizes the charge card (credit card, cash card or charge-only card) of the electric vehicle user.

메모리부(370)는 전기자동차 이용자의 이용량과 요금 및 전기자동차 이용자의 스마트폰 번호, 충방전기(300)나 배터리 랙(400) 관리자의 스마트폰이나 PC 식별정보 등이 저장된다. The memory unit 370 stores the usage amount and charge of the electric vehicle user, the smart phone number of the electric vehicle user, and the smart phone or PC identification information of the charger/discharger 300 or the battery rack 400 manager.

센싱부(380)는 충격감지센서, 습도감지센서 및 온도감지센서 중 하나 이상으로 구성되어 충방전기(300)와 배터리 랙(400)의 충격(자동차 충돌 등)이나 습도이상, 누전, 배터리의 이상 온도 상승 등을 감지한다.The sensing unit 380 is composed of one or more of an impact sensor, a humidity sensor, and a temperature sensor, and the shock (vehicle collision, etc.) of the charger/discharger 300 and the battery rack 400, humidity abnormality, short circuit, battery abnormality Detect temperature rise, etc.

제어부(390)는 내부통신부(310), 외부통신부(320), 배터리충전부(DC/DC 컨버터)(330), 배터리방전부(EV 충전부)(340), 터치스크린부(350), 카드인식부(360), 메모리부(370) 및 센싱부(380)를 제어하며, 기본적으로는 에너지관리시스템(700)으로 배터리 랙(400)의 배터리들의 에너지 사용현황을 실시간으로 내부 통신부(310)를 통해 통신하며, 충전완료 시나 충전 중 이상상황 발생 시 전기자동차 이용자와 관리자의 스마트폰이나 PC로 이상 상황을 외부 통신부(320)를 통해 전송하도록 제어한다. The control unit 390 includes an internal communication unit 310 , an external communication unit 320 , a battery charging unit (DC/DC converter) 330 , a battery discharging unit (EV charging unit) 340 , a touch screen unit 350 , and a card recognition unit. Controls the 360, the memory unit 370 and the sensing unit 380, basically, the energy management system 700, the energy usage status of the batteries of the battery rack 400 in real time through the internal communication unit 310 It communicates and controls to transmit the abnormal situation to the smart phone or PC of the electric vehicle user and manager through the external communication unit 320 when charging is completed or an abnormal situation occurs during charging.

도 5는 본 발명 제2실시예에 따른 에너지저장시스템을 이용한 전기자동차 충전시스템을 설명하기 위한 도면이고, 도 6은 도 5에 나타낸 에너지저장시스템을 이용한 전기자동차 충전시스템에서 충방전기의 제2실시예를 설명하기 위한 블록 구성도이며, 도 7은 도 5에 나타낸 에너지저장시스템을 이용한 전기자동차 충전시스템에서 충방전기의 제2실시예를 설명하기 위한 블록 구성도이다.5 is a view for explaining an electric vehicle charging system using an energy storage system according to a second embodiment of the present invention, and FIG. 6 is a second embodiment of a charging/discharging device in the electric vehicle charging system using the energy storage system shown in FIG. It is a block diagram for explaining an example, and FIG. 7 is a block diagram for explaining a second embodiment of a charger/discharger in an electric vehicle charging system using the energy storage system shown in FIG. 5 .

본 발명 제2실시예에 따른 에너지저장시스템을 이용한 전기자동차 충전시스템은 도 5 내지 도 7에 나타낸 바와 같이, GRID(100), 전기자동차(EV) 충전기(200), 충방전기(300), 배터리 랙(400), 제1스위치(LS)(500), 제2스위치(BPU)(600) 및 에너지관리시스템(EMS)(700)을 포함하여 구성된다.As shown in Figs. 5 to 7, the electric vehicle charging system using the energy storage system according to the second embodiment of the present invention is a GRID 100, an electric vehicle (EV) charger 200, a charger/discharger 300, and a battery. It is configured to include a rack 400, a first switch (LS) 500, a second switch (BPU) 600 and an energy management system (EMS) (700).

본 발명 제2실시예에 따른 에너지저장시스템을 이용한 전기자동차 충전시스템의 기본구성은 도 2에 나타낸 에너지저장시스템을 이용한 전기자동차 충전시스템과 유사하다. 다만, 제1스위치(500)가 전력망인 GRID(100)와 충방전기(300) 사이에 구성되어 있으며, 그렇기 때문에 충방전기(300)의 구성 역시 도 7에서와 같이 배터리 충전부(331)가 AC/DC 컨버터로 구성됨에 차이가 있다. 즉 도 2에 나타낸 본 발명 제1실시예는 기본적으로 DC로 컨버팅된 DC전원을 배터리에 적합한 전압으로 DC/DC 컨버팅하지만, 본 발명 제1실시예에서는 AC전원을 배터리에 충전하기 위하여 AC/DC 컨버팅한다는 차이가 있다. 그외에는 동일하므로 상세한 설명은 도 2 내지 도 4를 참조하기로 한다.The basic configuration of the electric vehicle charging system using the energy storage system according to the second embodiment of the present invention is similar to the electric vehicle charging system using the energy storage system shown in FIG. 2 . However, the first switch 500 is configured between the GRID 100 and the charger/discharger 300, which is the power grid, and thus the configuration of the charger/discharger 300 is also the battery charging unit 331 as shown in FIG. There is a difference in that it is composed of a DC converter. That is, the first embodiment of the present invention shown in FIG. 2 basically converts DC power converted to DC to a voltage suitable for the battery, but in the first embodiment of the present invention, AC/DC is used to charge the AC power to the battery. There is a difference in conversion. Other than that, since it is the same, the detailed description will refer to FIGS. 2 to 4 .

이러한 본 발명 제1실시예와 제2실시예에 따르면, 전기자동차가 증가됨에 따라 기존에 전기자동차 충전기와는 별도로 기존과 동일내지 유사한 전기자동차 충전기를 설치하기 위하여, 즉 수전용량을 증대하기 위해서는 변압기의 증설이나 전기안전기구의 교체 사양 변경 등의 막대한 공사비용의 추가없이 복수의 전기자동차에 대한 동시 충전이 가능한 배터리 랙으로 이루어진 충전기용 에너지저장시스템을 기존 전력망에 연결하고, 기존 전기자동차 충전기의 미사용 시간에 에너지저장시스템에 충전하고 이를 통해 복수의 전기자동차에 동시 충전도 가능하게 된다.According to the first and second embodiments of the present invention, as the number of electric vehicles increases, in order to install the same or similar electric vehicle charger separately from the existing electric vehicle charger, that is, in order to increase the power receiving capacity, a transformer The energy storage system for chargers, which consists of a battery rack capable of simultaneously charging multiple electric vehicles, is connected to the existing power grid without the addition of huge construction costs such as expansion of the electric safety device or change of specifications for electric safety devices, and does not use the existing electric vehicle chargers. It charges the energy storage system in time, and through this, it is possible to simultaneously charge multiple electric vehicles.

특히 경부하 시간(특히 심야전기를 이용한 충전)에 미리 충전할 수 있어 건축물에 추가로 전기자동차 충전기를 설치하는 경우 발생할 수 있는 피크(Peak) 전력 상승에 따른 전기세 상승 문제를 해결할 수 있다.In particular, it can be charged in advance during light load times (especially charging using late-night electricity), so it is possible to solve the problem of an increase in electricity bills due to a peak power increase that may occur when an additional electric vehicle charger is installed in a building.

도 8는 본 발명에 따른 에너지저장시스템을 이용한 전기자동차 충전시스템의 설치예를 나타낸 도면이다.8 is a view showing an example of installation of an electric vehicle charging system using an energy storage system according to the present invention.

본 발명에 따른 에너지저장시스템을 이용한 전기자동차 충전시스템의 설치예는 도 8에 나타낸 바와 같이, 기존의 전기자동차 충전기와는 별도로 여유 공간에 배터리랙과 본 발명 충방전기를 설치한 예를 나타내고 있다.As shown in FIG. 8, an example of installation of an electric vehicle charging system using an energy storage system according to the present invention shows an example in which a battery rack and a charger/discharger of the present invention are installed in a free space separately from the conventional electric vehicle charger.

이러한 본 발명 에너지저장시스템을 이용한 전기자동차 충전시스템은 대용량 에너지저장시스템보다 상대적으로 작게 구성할 수 있어 기존 주차장의 여유공간에 설치할 수 있고, 전기자동차 충전기를 새롭게 추가하여야 하는 것에 비해 작업공정이 단순하다.The electric vehicle charging system using the energy storage system of the present invention can be configured relatively smaller than a large-capacity energy storage system, so it can be installed in the free space of an existing parking lot, and the work process is simple compared to the need to newly add an electric vehicle charger. .

도 9는 본 발명에 따른 에너지저장시스템을 이용한 전기자동차 충전시스템의 운용방법의 실시예를 설명하기 위한 흐름도이다.9 is a flowchart for explaining an embodiment of a method for operating an electric vehicle charging system using an energy storage system according to the present invention.

본 발명에 따른 에너지저장시스템을 이용한 전기자동차 충전시스템의 운용방법의 실시예는 도 9에 나타낸 바와 같이, 전기자동차 충전기에 전원을 공급하는 전력원(GRID)이나 전력원에 연결된 전기자동차 충전기에 다른 전기자동차에 전기를 충전하기 위한 충방전기 및 에너지저장시스템용 배터리 랙을 설치하고, 전력원과 전기자동차 충전기 및 충방전기와 에너지관리시스템(EMS)을 통신으로 연결한다(S100). 이때, 충방전기에 관리자의 스마트폰이나 PC 중 하나 이상을 등록한다.As shown in FIG. 9, an embodiment of a method of operating an electric vehicle charging system using an energy storage system according to the present invention is different from a power source (GRID) for supplying power to an electric vehicle charger or an electric vehicle charger connected to a power source. A battery rack for a charger/discharger and an energy storage system for charging electricity to an electric vehicle is installed, and a power source, an electric vehicle charger, and a charger/discharger and an energy management system (EMS) are connected by communication (S100). At this time, one or more of the manager's smartphone or PC is registered in the charger/discharger.

그리고 배터리관리시스템(BMS)은 전기자동차 충전기가 전기자동차를 충전중인지, 미사용인지를 통신을 통해 체크하여 미사용시에는 충방전기로 에너지저장시스템용 배터리 랙의 배터리를 충전하도록 요청한다(S110). 그에 따라 충방전기의 제어부는 AC/DC 컨버터나 DC/DC 컨버터를 통해 배터리를 충전한다.And the battery management system (BMS) requests to charge the battery of the battery rack for the energy storage system with a charger/discharger when not in use by checking through communication whether the electric vehicle charger is charging the electric vehicle or not in use (S110). Accordingly, the controller of the charger/discharger charges the battery through an AC/DC converter or a DC/DC converter.

한편 충방전기의 WDJ부는 배터리 랙의 충격(차량 충돌 등), 습도와 온도를 주기적으로 센서를 통해 감지하여 이상 발생 시 관리자의 스마트폰이나 PC로 전송한다(S120).Meanwhile, the WDJ unit of the charger/discharger periodically detects the shock (vehicle collision, etc.), humidity and temperature of the battery rack through the sensor and transmits it to the administrator's smartphone or PC when an abnormality occurs (S120).

또한 충방전기는 전기자동차 이용자가 충전 요청 시 카드결제를 수행하고 이용자 스마트폰 등록을 요청한다(S130). 이때, 충방전기의 제어부는 배터리 랙의 충전용량에 따라 충전가능 여부를 터치스크린부를 통해 안내한다.In addition, the charger/discharger performs card payment when the electric vehicle user requests charging and requests the user's smartphone registration (S130). At this time, the control unit of the charger/discharger guides through the touch screen unit whether charging is possible according to the charging capacity of the battery rack.

그리고 충전완료나 충전 중 이상 발생시 등록된 이용자의 스마트폰으로 문자 전송하고, 이상 발생의 경우 관리자 스마트폰으로 문자를 전송하거나 관리자 PC로 안내한다(S140).And when an abnormality occurs during charging or charging, a text is transmitted to the registered user's smartphone, and in the case of an abnormality, a text is transmitted to the administrator's smartphone or guides to the administrator PC (S140).

충방전기를 이용하여 전기자동차 충전 중 기존의 전기자동차 충전기를 이용한 충전 요청시 충방전기와 전기 자동차 충전기를 이용한 동시 충전이 수행된다(S150).Simultaneous charging using the charger/discharger and the electric vehicle charger is performed when a charging request using an existing electric vehicle charger is requested while charging the electric vehicle using the charger/discharger (S150).

이상과 같은 예로 본 발명을 설명하였으나, 본 발명은 반드시 이러한 예들에 국한되는 것이 아니고, 본 발명의 기술사상을 벗어나지 않는 범위 내에서 다양하게 변형 실시될 수 있다. 따라서 본 발명에 개시된 예들은 본 발명의 기술 사상을 한정하기 위한 것이 아니라 설명하기 위한 것이고, 이러한 예들에 의하여 본 발명의 기술 사상의 범위가 한정되는 것은 아니다. 본 발명의 보호 범위는 아래의 청구범위에 의하여 해석되어야 하며, 그와 동등한 범위 내에 있는 모든 기술 사상은 본 발명의 권리범위에 포함되는 것으로 해석되어야 한다. Although the present invention has been described with the above examples, the present invention is not necessarily limited to these examples, and various modifications may be made within the scope without departing from the technical spirit of the present invention. Therefore, the examples disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these examples. The protection scope of the present invention should be construed by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

100 : GRID 200 : 전기자동차(EV) 충전기
300 : 충방전기 310 : 내부통신부
320 : 외부통신부 330 : 배터리충전부(DC/DC 컨버터)
331 : 배터리충전부(AC/DC 컨버터) 340 : 배터리방전부
350 : 터치스크린부 360 : 카드인식부
370 : 메모리부 380 : 센싱부
390 : 제어부 400 : 배터리셀
500 : 제1스위치(LS) 600 : 제2스위치(BPU)
700 : 에너지관리시스템(EMS)100: GRID 200: Electric vehicle (EV) charger
300: charging/discharging device 310: internal communication department
320: external communication unit 330: battery charging unit (DC/DC converter)
331: battery charging unit (AC/DC converter) 340: battery discharging unit
350: touch screen unit 360: card recognition unit
370: memory unit 380: sensing unit
390: control unit 400: battery cell
500: first switch (LS) 600: second switch (BPU)
700: Energy Management System (EMS)

Claims (5)

일반교류전원을 공급하는 GRID(100)로부터 공급된 AC 전원을 직류전원으로 변환하는 전기자동차(EV) 충전기(200)로부터 직류전원을 공급받거나, AC/DC 컨버터로 구성된 배터리 충전부(331)가 구비되어 상기 GRID(100)로부터 공급된 AC 전원을 직류전원으로 변환하여 배터리 랙(400)을 충전하고, 상기 배터리 랙(400)에 충전된 직류전원으로 상기 전기자동차(EV) 충전기(200)와 동시에 또는 별도로 다른 전기자동차를 충전하는 충방전기(300);
다수의 배터리로 구성되어 상기 충방전기(300)로부터 직류전원을 공급받아 저장하는 상기 배터리 랙(400);
상기 충방전기(300)로부터 상기 배터리 랙(400)의 충방전 전력량을 제어하기 위하여 상기 배터리 랙(400)의 에너지 사용현황을 실시간으로 모니터링, 제어 및 분석하고, 상기 전기자동차 충전기(200)의 사용, 미사용에 따라 상기 충방전기(300)를 통해 상기 배터리 랙(400)에 대한 충전을 제어하는 에너지관리시스템(700);
상기 GRID(100)와 충방전기(300) 또는 상기 전기자동차(EV) 충전기(200)와 충방전기(300) 사이에 구성되어, 상기 전기자동차 충전기(200)가 전기자동차의 충전시 오프되며, 상기 전기자동차 충전기(200)의 미사용시간에 온되어 상기 배터리 랙(400)의 배터리를 충전하는 제1스위치(500)인 리미트 스위치; 및,
상기 충방전기(300)와 배터리 랙(400) 사이에 구성된 에너지저장시스템용 스위치인 제2스위치(BPU : Battery Protection Unit)(600);를 포함하여 구성되고,
상기 충방전기(300)는 상기 배터리 랙(400)의 용량에 따라 복수의 전기 자동차를 동시에 충전하되,
상기 충방전기(300)는 상기 에너지 관리 시스템(700)과 통신하는 내부통신부(310)와, 전기자동차 이용자가 자신의 전기자동차를 상기 충방전기(300)를 통해 충전시 충전 완료 시나 충전에 문제가 발생한 경우나, 상기 배터리 랙(400)의 배터리 부족의 경우에 전기자동차 이용자가 스마트폰 번호를 등록한 경우 해당 스마트폰으로 문자메시지를 전송되도록 주변의 AP(Access Point)와 연결되는 WiFi나, 이동통신이 가능한 이동통신망과 연결되는 외부통신부(320)와, 상기 전기자동차 충전기(200) 사용시에는 개방(Open) 상태이고, 상기 전기자동차 충전기(200) 미사용시에는 단락(Short)되어 상기 전기자동차 충전기(200)로부터 DC 전원을 공급받아 상기 배터리 랙(400)의 배터리 충전에 적합한 충전전압으로 컨버팅하여 충전하는 배터리충전부(330)와, 상기 충방전기(300)에 전기자동차가 충전을 요청하면 상기 배터리 랙(400)의 배터리에 충전된 충전전압을 충전을 요청한 전기자동차로 공급하여 충전하는 배터리방전부(EV 충전부)(340)와, 전기자동차 이용자가 충전을 요청하거나, 자신의 스마트폰번호를 입력시키는데 이용되는 터치스크린부(350)와, 전기자동차 이용자의 충전카드를 인식하는 카드인식부(360)와, 전기자동차 이용자의 이용량과 요금 및 전기자동차 이용자의 스마트폰 번호, 충방전기(300)나 배터리 랙(400) 관리자의 스마트폰이나 PC 식별정보가 저장되는 메모리부(370)와, 충격감지센서, 습도감지센서 및 온도감지센서 중 하나 이상으로 구성되어 상기 충방전기(300)와 배터리 랙(400)의 충격이나 습도이상, 누전, 배터리의 이상 온도 상승을 하는 센싱부(380) 및 상기 내부통신부(310), 외부통신부(320), 배터리충전부(330), 배터리방전부(EV 충전부)(340), 터치스크린부(350), 카드인식부(360), 메모리부(370) 및 센싱부(380)를 제어하며, 상기 에너지관리시스템(700)으로 배터리 랙(400)의 배터리들의 에너지 사용현황을 실시간으로 내부 통신부(310)를 통해 통신하며, 충전완료 시나 충전 중 이상상황 발생 시 전기자동차 이용자와 관리자의 스마트폰이나 PC로 이상 상황을 외부 통신부(320)를 통해 전송하도록 제어하는 제어부(390)를 포함하여 구성됨을 특징으로 하는 에너지저장시스템을 이용한 전기자동차 충전시스템.
DC power is supplied from the electric vehicle (EV) charger 200 that converts AC power supplied from the GRID 100 that supplies general AC power to DC power, or a battery charging unit 331 composed of an AC/DC converter is provided. The GRID 100 converts the AC power supplied from the 100 to DC power to charge the battery rack 400, and the electric vehicle (EV) charger 200 with the DC power charged in the battery rack 400 at the same time or a charger/discharger 300 for separately charging other electric vehicles;
The battery rack 400 configured to receive and store DC power from the charger and discharger 300 consisting of a plurality of batteries;
In order to control the amount of charging and discharging power of the battery rack 400 from the charging/discharging device 300, the energy usage status of the battery rack 400 is monitored, controlled and analyzed in real time, and the use of the electric vehicle charger 200 , an energy management system 700 for controlling the charging of the battery rack 400 through the charger/discharger 300 according to non-use;
It is configured between the GRID 100 and the charger/discharger 300 or the electric vehicle (EV) charger 200 and the charger/discharger 300, and the electric vehicle charger 200 is turned off when the electric vehicle is charged. The limit switch which is a first switch 500 which is turned on in the non-use time of the electric vehicle charger 200 to charge the battery of the battery rack 400; And,
A second switch (BPU: Battery Protection Unit) 600 which is a switch for an energy storage system configured between the charger and discharger 300 and the battery rack 400;
The charger/discharger 300 simultaneously charges a plurality of electric vehicles according to the capacity of the battery rack 400,
The charger/discharger 300 has an internal communication unit 310 that communicates with the energy management system 700, and when an electric vehicle user charges his/her electric vehicle through the charger/discharger 300, there is a problem with charging or charging. In case of occurrence or lack of battery of the battery rack 400, when an electric vehicle user registers a smartphone number, WiFi or mobile communication connected to a nearby AP (Access Point) to transmit a text message to the corresponding smartphone An external communication unit 320 connected to a mobile communication network capable of this, and the electric vehicle charger 200 are in an open state when used, and are shorted when the electric vehicle charger 200 is not in use, so that the electric vehicle charger ( 200) receiving DC power from the battery charging unit 330 for converting to a charging voltage suitable for charging the battery of the battery rack 400 and charging the electric vehicle when the electric vehicle requests charging from the charger and discharger 300, the battery rack A battery discharging unit (EV charging unit) 340 that supplies and charges the charging voltage charged in the battery of 400 to the electric vehicle requesting charging, and the electric vehicle user requesting charging or entering their smartphone number The touch screen unit 350 used, the card recognition unit 360 for recognizing the charging card of the electric vehicle user, the usage amount and rate of the electric vehicle user, the smartphone number of the electric vehicle user, the charging/discharging device 300 or The battery rack 400 consists of a memory unit 370 in which the administrator's smartphone or PC identification information is stored, and at least one of a shock sensor, a humidity sensor and a temperature sensor, and the charger and discharger 300 and the battery rack ( Sensing unit 380 and the internal communication unit 310, external communication unit 320, battery charging unit 330, battery discharging unit (EV charging unit) for shock or humidity abnormality, short circuit, and abnormal temperature rise of the battery (400) ( 340), the touch screen unit 350, the card recognition unit 360, the memory unit 370 and controlling the sensing unit 380, the energy of the batteries of the battery rack 400 to the energy management system 700 It communicates the current usage status through the internal communication unit 310 in real time, and controls to transmit the abnormal situation to the smart phone or PC of the electric vehicle user and manager through the external communication unit 320 when charging is complete or an abnormal situation occurs during charging. An electric vehicle charging system using an energy storage system, characterized in that it comprises a control unit (390).
 청구항 1에 있어서,
상기 충방전기(300)는,
상기 배터리 랙(400)의 복수의 배터리의 상태 감지 및 배터리 제어 운영을 관리하여 배터리에 최상의 컨디션을 제공하기 위하여 배터리 상태에 따른 개별충전방식을 통해 불량 배터리를 감지하는 것을 특징으로 하는 에너지저장시스템을 이용한 전기자동차 충전시스템.
The method according to claim 1,
The charger/discharger 300 is
In order to provide the best condition to the battery by managing the state detection and battery control operation of a plurality of batteries of the battery rack 400, an energy storage system characterized in that it detects a defective battery through an individual charging method according to the battery state. Electric vehicle charging system.
 삭제delete 청구항 1에 있어서,
상기 충방전기(300)는,
상기 GRID(100)로부터 전원 공급시 AC/DC 컨버팅하여 상기 배터리 랙(400)에 충전하기 위한 AC/DC 컨버터가 더 구성됨을 특징으로 하는 에너지저장시스템을 이용한 전기자동차 충전시스템.The method according to claim 1,
The charger/discharger 300 is
An AC/DC converter for charging the battery rack 400 by AC/DC conversion when power is supplied from the GRID (100) is further configured. An electric vehicle charging system using an energy storage system. 삭제delete
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