KR102397707B1 - Electric vehicle including small metal removal device, and control method thereof - Google Patents

Electric vehicle including small metal removal device, and control method thereof Download PDF

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KR102397707B1
KR102397707B1 KR1020180140830A KR20180140830A KR102397707B1 KR 102397707 B1 KR102397707 B1 KR 102397707B1 KR 1020180140830 A KR1020180140830 A KR 1020180140830A KR 20180140830 A KR20180140830 A KR 20180140830A KR 102397707 B1 KR102397707 B1 KR 102397707B1
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South Korea
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electric vehicle
compressed air
pad
air outlet
air
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KR1020180140830A
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KR20200056762A (en
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이영호
고홍기
김용민
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르노코리아자동차 주식회사
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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
    • B60L5/00—Current collectors for power supply lines of electrically-propelled vehicles
    • B60L5/005—Current collectors for power supply lines of electrically-propelled vehicles without mechanical contact between the collector and the power supply line
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
    • B60L53/12—Inductive energy transfer
    • B60L53/124—Detection or removal of foreign bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
    • B60L53/12—Inductive energy transfer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/30—Constructional details of charging stations
    • B60L53/35—Means for automatic or assisted adjustment of the relative position of charging devices and vehicles
    • B60L53/38—Means for automatic or assisted adjustment of the relative position of charging devices and vehicles specially adapted for charging by inductive energy transfer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/02—Arrangements of pumps or compressors, or control devices therefor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/60—Circuit arrangements or systems for wireless supply or distribution of electric power responsive to the presence of foreign objects, e.g. detection of living beings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/90—Vehicles comprising electric prime movers
    • B60Y2200/91—Electric vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/12—Electric charging stations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

본 발명은 전기자동차 무선충전 시스템에서 미세금속을 제거하기 위한 장치 및 그 방법에 관한 것으로, 본 발명에 의한 전기자동차는 압축공기를 저장하는 공기저장탱크와 공기배출구를 포함하며, 공기배출구를 통해 배출되는 압축공기의 압력에 의해 FOD(Foreign Object Detection)에 의해 검출되지 않는 미세한 크기의 금속이나 이물질을 제거할 수 있다. 이를 위해 공기배출구는 전기자동차 집전패드의 코일의 중심부에 설치되어 급전패드를 향해 압축공기를 분출하는 것을 특징으로 한다.The present invention relates to an apparatus and method for removing fine metal from a wireless charging system for an electric vehicle, and the electric vehicle according to the present invention includes an air storage tank for storing compressed air and an air outlet, and is discharged through the air outlet It is possible to remove fine-sized metals or foreign substances that are not detected by FOD (Foreign Object Detection) by the compressed air pressure. To this end, the air outlet is installed in the center of the coil of the electric vehicle collecting pad, and it is characterized in that it ejects compressed air toward the electric power supply pad.

Description

미세금속 제거장치를 포함하는 전기자동차 및 그 제어방법{ELECTRIC VEHICLE INCLUDING SMALL METAL REMOVAL DEVICE, AND CONTROL METHOD THEREOF}Electric vehicle including micro-metal removal device and control method thereof

본 발명은 전기자동차의 충전기와 그 제어방법에 관한 것으로, 특히 무선충전 시스템의 FOD(Foreign Object Detection)에 관한 것이다.The present invention relates to a charger for an electric vehicle and a control method therefor, and more particularly, to Foreign Object Detection (FOD) of a wireless charging system.

전기자동차의 다수는 충전단자를 연결하는 유선방식으로 충전을 진행한다. 하지만 유선방식 충전의 번거로움 때문에 급전패드와 집전패드를 이용하는 무선충전 방식도 연구가 활발히 진행되고 있다.Many electric vehicles are charged by a wired method that connects the charging terminals. However, due to the cumbersomeness of wired charging, research on a wireless charging method using a power supply pad and a current collecting pad is being actively conducted.

도 6은 일반적인 무선충전 시스템의 기본 구조를 나타낸다. 전력을 송신하기 위한 급전패드의 코일에서는 교류 전력을 자속(Magnetic Flux)으로 변환하여 방출하고, 집전패드의 코일은 자속을 교류 전력으로 변환하여 배터리에 충전하는 자기유도방식이 사용된다.6 shows the basic structure of a general wireless charging system. A magnetic induction method is used in which the coil of the feeding pad for transmitting power converts AC power into magnetic flux and emits it, and the coil of the current collecting pad converts the magnetic flux into AC power to charge the battery.

그런데 이런 자기유도 충전방식에서는 급전패드에서 초고주파를 발생시키기 때문에 급전패드와 집전패드 사이에 금속물질이 있으면 열이 발생하고 심한 경우 화재가 발생할 위험도 있다.However, in this magnetic induction charging method, since super high frequency is generated from the feeding pad, if there is a metal material between the feeding pad and the current collecting pad, heat is generated, and in severe cases, there is a risk of fire.

따라서 SAE(Society of Automotive Engineers) J2954 (2017)규격의 R.2.2에는 FOD(Foreign Object Detection)에 의해 검출되어야 하는 필수 금속 물체들을 정의해두고 있다. 또한 이러한 FOD 장치는 무선충전 전기자동차 혹은 외부에 적용되어야 함이 언급되어 있다.Therefore, in R.2.2 of SAE (Society of Automotive Engineers) J2954 (2017) standard, essential metal objects to be detected by FOD (Foreign Object Detection) are defined. It is also mentioned that this FOD device should be applied to a wireless charging electric vehicle or outside.

하지만 이러한 항목들은 무선충전의 안전성 확보를 위한 최소한의 리스트이고 기재되지 않은 모든 금속물질 또한 문제가 될 수 있다. 기재된 금속과 다른 종류의 금속, 혹은 기재된 크기보다 작은 금속이라도 온도상승에 의한 발화의 원인이 되거나 무선충전 효율을 떨어뜨리는 원인이 될 수 있기 때문이다. 더욱이 전기자동차의 배터리 용량이 점점 더 증가되는 추세이고, 그에 따라 충전기의 송출 전력도 더욱 세지고 있으므로 리스트에 기재되지 않는 금속성 물체의 제거는 간과할 수 없는 문제이다.However, these items are the minimum list for securing the safety of wireless charging, and all metal materials not listed can also be a problem. This is because even a different type of metal than the stated metal, or a metal smaller than the stated size may cause ignition due to temperature rise or decrease wireless charging efficiency. Moreover, as the battery capacity of electric vehicles is gradually increasing, and the power output of the charger is also increasing accordingly, the removal of metallic objects not listed in the list is a problem that cannot be overlooked.

종래 기술 중 대한민국 등록특허 제10-1854788호 발명은 무선충전기에서 금속 물체를 검출하는 장치 및 방법을 제안하고 있으나, 감지장치의 사각지대에 있거나 기준 이하 크기의 금속물질은 여전히 검출을 하지 못하는 한계가 있다.Among the prior art, the invention of Korean Patent No. 10-1854788 proposes an apparatus and method for detecting a metal object in a wireless charger, but there is a limit in that it is still impossible to detect a metal material in the blind spot of the sensing device or having a size below the standard. there is.

현재 50원 동전 크기 혹은 2cmX2cm 크기의 금속보다 더 작은 금속이나 이물질을 검출할 방법이 없는 상황에서, 본 발명의 발명자들은 이러한 종래 기술의 무선충전 방식의 문제점 해결을 위해 연구 노력해 왔다. 무선충전 시스템에서 패드 사이의 미세한 금속 물질을 제거할 수 있는 장치 및 방법을 개발하기 위해 많은 노력 끝에 본 발명을 완성하기에 이르렀다.Currently, in a situation where there is no method to detect a metal or foreign material smaller than the size of a 50 won coin or a metal of 2cmX2cm size, the inventors of the present invention have been researching to solve the problems of the wireless charging method of the prior art. After much effort to develop a device and method capable of removing the fine metallic material between the pads in the wireless charging system, the present invention has been completed.

본 발명의 목적은 무선충전 시스템에서 급전패드와 집전패드 사이의 미세금속을 효과적으로 제거하는 것이다.An object of the present invention is to effectively remove the fine metal between the power feeding pad and the current collecting pad in a wireless charging system.

다른 검출방식에 의해 검출되지 않는 미세금속과 이물질을 제거함으로써 화재위험을 예방하고 충전효율을 높이는 것이 본 발명의 또 다른 목적이다.Another object of the present invention is to prevent fire risk and increase charging efficiency by removing fine metals and foreign substances that are not detected by other detection methods.

한편, 본 발명의 명시되지 않은 또 다른 목적들은 하기의 상세한 설명 및 그 효과로부터 용이하게 추론할 수 있는 범위 내에서 추가적으로 고려될 것이다.On the other hand, other objects not specified in the present invention will be additionally considered within the range that can be easily inferred from the following detailed description and effects thereof.

본 발명은 복수의 전기자동차 무선충전 시스템에서 FOD에 의해 검출되지 않는 미세금속 및 이물질을 제거하는 장치 및 방법에 관한 것으로, ,The present invention relates to an apparatus and method for removing fine metals and foreign substances that are not detected by FOD in a plurality of wireless charging systems for electric vehicles,

본 발명에 의한 전기자동차는:The electric vehicle according to the present invention is:

압축공기를 저장하기 위한 공기저장탱크, 무선전력 수신을 위한 집전패드, 압축공기를 분출하기 위한 공기배출구 및 제어부를 포함하되,An air storage tank for storing compressed air, a collecting pad for wireless power reception, an air outlet for ejecting compressed air, and a control unit,

상기 제어부는 하나이상의 프로세서 및 메모리를 포함하고, 상기 집전패드와 무선충전기의 급전패드의 정렬 후 상기 공기저장탱크와 공기배출구 사이의 밸브를 제어하여 압축공기를 배출시키고,The control unit includes at least one processor and a memory, and controls a valve between the air storage tank and the air outlet after aligning the power collecting pad and the power feeding pad of the wireless charger to discharge compressed air,

상기 공기배출구는 상기 집전패드 내부 코일이 없는 위치에 설치되는 것을 특징으로 한다.The air outlet may be installed at a position where there is no coil inside the current collecting pad.

상기 공기배출구는 5Kg/㎠ 이상의 압력으로 압축공기를 배출하는 것이 좋다.The air outlet preferably discharges compressed air at a pressure of 5Kg/cm2 or more.

위와 같은 본 발명의 과제해결수단에 의해서 본 발명은 무선충전 시스템에서 패드사이의 미세금속 등 이물질을 제거함으로써 온도상승이나 화재를 예방하고 무선충전의 효율을 더 높일 수 있는 효과가 있다.The present invention has the effect of preventing temperature rise or fire and further increasing the efficiency of wireless charging by removing foreign substances such as fine metal between the pads in the wireless charging system by the means of solving the problems of the present invention as described above.

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 it is an effect not explicitly mentioned herein, it is added that the effects described in the following specification expected by the technical features of the present invention and their potential effects are treated as described in the specification of the present invention.

도 1은 본 발명의 바람직한 어느 실시예에 따른 무선충전 시스템의 개략적인 구조도이다.
도 2는 본 발명의 바람직한 어느 실시예에 따른 전기자동차의 구조도이다.
도 3은 본 발명의 바람직한 어느 실시예에 따른 전기자동차 집전패드의 구조도이다.
도 4는 본 발명의 바람직한 다른 실시예에 따른 전기자동차 집전패드의 구조도이다.
도 5는 본 발명의 바람직한 어느 실시예에 따라 전기자동차의 충전 시 미세금속을 제거하는 상황을 나타내는 구조도이다.
도 6은 종래기술의 무선충전 시스템의 개략적인 구조도이다.
※ 첨부된 도면은 본 발명의 기술사상에 대한 이해를 위하여 참조로서 예시된 것임을 밝히며, 그것에 의해 본 발명의 권리범위가 제한되지는 아니한다.1 is a schematic structural diagram of a wireless charging system according to a preferred embodiment of the present invention.
2 is a structural diagram of an electric vehicle according to a preferred embodiment of the present invention.
3 is a structural diagram of a current collecting pad for an electric vehicle according to a preferred embodiment of the present invention.
4 is a structural diagram of a current collecting pad for an electric vehicle according to another preferred embodiment of the present invention.
5 is a structural diagram illustrating a situation in which fine metal is removed during charging of an electric vehicle according to a preferred embodiment of the present invention.
6 is a schematic structural diagram of a prior art wireless charging system.
※ It is revealed that the accompanying drawings are exemplified as a reference for understanding the technical idea of the present invention, and the scope of the present invention is not limited thereby.

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.Hereinafter, the configuration of the present invention guided by various embodiments of the present invention and effects resulting from the configuration will be described with reference to the drawings. In the description of the present invention, if it is determined that related known functions are obvious to those skilled in the art and may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

도 1은 본 발명의 바람직한 어느 실시예에 따른 무선충전 시스템의 개략적인 구조도이다.1 is a schematic structural diagram of a wireless charging system according to a preferred embodiment of the present invention.

본 발명에 따른 전기자동차(10)는 공기저장탱크(110), 집전패드(120) 및 공기배출구(130)을 포함하여 무선충전기(20)의 급전패드(210)와 집전패드(120)의 정렬이 이루어지만 공기배출구(130)를 통해 압축공기를 배출함으로써 급전패드(210)와 집전패드(120) 사이의 미세금속 및 이물질을 제거할 수 있다.The electric vehicle 10 according to the present invention includes an air storage tank 110 , a current collecting pad 120 , and an air outlet 130 , and the power supply pad 210 of the wireless charger 20 and the current collecting pad 120 are aligned. However, by discharging compressed air through the air outlet 130 , it is possible to remove fine metal and foreign substances between the power feeding pad 210 and the current collecting pad 120 .

도 2는 본 발명의 바람직한 어느 실시예에 따른 전기자동차의 좀 더 자세한 구조도이다.2 is a more detailed structural diagram of an electric vehicle according to a preferred embodiment of the present invention.

본 발명에 따른 전기자동차(10)는 공기저장탱크(110), 집전패드(120), 공기배출구(130) 및 제어부(140)를 포함한다.The electric vehicle 10 according to the present invention includes an air storage tank 110 , a current collecting pad 120 , an air outlet 130 , and a control unit 140 .

버스나 트럭 등의 대형차량은 일반 승용차보다 무게가 무겁고 따라서 제동에 더 큰 힘이 필요하다. 그래서 더 큰 제동력을 얻을 수 있는 압축공기를 이용한 에어 브레이크(Air Brake)를 사용하고, 따라서 압축공기를 저장하기 위한 공기저장탱크(110)를 포함한다.Large vehicles such as buses and trucks are heavier than ordinary passenger cars and therefore require greater braking force. Therefore, it uses an air brake using compressed air to obtain a greater braking force, and thus includes an air storage tank 110 for storing compressed air.

공기저장탱크(110)에는 공기 압축기(Air Compressor)에서 만들어진 압축공기가 체크밸브(Check Valve)를 거쳐 저장된다.In the air storage tank 110 , the compressed air produced by an air compressor is stored through a check valve.

브레이크 페달을 밟으면 공기저장탱크(110)에 있던 압축공기가 퀵 릴리스 밸브(Quick Release Valve)를 거쳐 앞 브레이크 챔버에 전달되어 앞 브레이크 챔버가 작동하여 앞 브레이크가 작동한다. 또한 브레이크 페달에 의해 릴레이 밸브가 열리면 공기저장탱크(110)에 있던 압축공기가 릴레이 밸브를 거쳐 뒤 브레이크 챔버에 전달되어 뒤 브레이크가 작동하게 된다. 브레이크 챔버에 압축공기가 전달되면 챔버 막에 설치된 푸시로드가 밀려서 캠과 브레이크 슈우가 작동하여 드럼에 밀착되며 제동력이 발생하는 구조이다. 브레이크 페달을 놓으면 브레이크 밸브와 릴레이 사이의 압축공기는 브레이크 밸브 배기 구멍을 통해 대기중으로 방출되고, 앞뒤 챔버 내부의 압축공기는 퀵 릴리스 밸브, 릴레이 밸브에서 대기로 방출된다.When the brake pedal is depressed, the compressed air in the air storage tank 110 is delivered to the front brake chamber through a quick release valve, and the front brake chamber is operated to operate the front brake. In addition, when the relay valve is opened by the brake pedal, the compressed air in the air storage tank 110 is delivered to the rear brake chamber through the relay valve to operate the rear brake. When compressed air is delivered to the brake chamber, the push rod installed on the chamber membrane is pushed, and the cam and brake shoe operate to closely adhere to the drum and generate braking force. When the brake pedal is released, the compressed air between the brake valve and the relay is discharged to the atmosphere through the brake valve exhaust hole, and the compressed air inside the front and rear chambers is discharged to the atmosphere by the quick release valve and the relay valve.

이와 같이 브레이크 작동에 꼭 필요한 공기저장탱크(110)를 집전패드(120)와 급전패드(210) 사이의 미세금속 또는 이물질을 제거하기 위해 사용하는 것이다.As described above, the air storage tank 110 essential for brake operation is used to remove fine metal or foreign substances between the current collecting pad 120 and the power feeding pad 210 .

집전패드(120)는 무선충전기(20)의 급전패드(210)에서 송신하는 전력을 수신하기 위해 사용된다. 급전패드(210)에서 전력은 코일을 이용하여 자속(Magnetic Flux)으로 바뀌어 전송되므로, 이를 수신하기 위해 집전패드(120) 내부에도 코일 구조로 되어있다.The power collecting pad 120 is used to receive power transmitted from the power feeding pad 210 of the wireless charger 20 . Since the power in the power feeding pad 210 is converted into magnetic flux and transmitted using a coil, the power collecting pad 120 also has a coil structure in order to receive it.

공기배출구(130)는 집전패드(120)에 설치되어 공기저장탱크(110)에 있던 압축공기를 분사하여 미세금속을 제거한다. 집전패드(120)의 내부는 전력 수신을 위한 코일이 있기 때문에 공기배출구(130)를 어디에 설치할 것인가는 중요한 문제이다.The air outlet 130 is installed on the current collecting pad 120 to spray the compressed air in the air storage tank 110 to remove fine metal. Since there is a coil for power reception inside the current collecting pad 120 , it is an important issue where to install the air outlet 130 .

도 3은 본 발명의 바람직한 어느 실시예에 따른 전기자동차 집전패드의 구조도이다.3 is a structural diagram of a current collecting pad for an electric vehicle according to a preferred embodiment of the present invention.

도 3의 (a)와 같이 집전패드 혹은 급전패드의 내부에는 코일이 감겨져 있는데, 동심원의 형태로 코일이 감겨져 있고 중심은 일정부분이 비어있는 형태이다.As shown in (a) of FIG. 3 , a coil is wound inside the current collecting pad or the feeding pad, and the coil is wound in the form of concentric circles, and the center thereof is empty.

따라서 도 3의(b)와 같이 집전패드(120)의 비어있는 동심원 부분에 공기배출구(130)를 설치할 수 있다.Therefore, as shown in FIG. 3B , the air outlet 130 may be installed in an empty concentric circle portion of the current collecting pad 120 .

도 4는 본 발명의 바람직한 다른 실시예에 따른 전기자동차 집전패드의 구조도이다.4 is a structural diagram of a current collecting pad for an electric vehicle according to another preferred embodiment of the present invention.

집전패드나 급전패드는 써큘러 방식 외에도 DD방식이 사용될 수 있는데, 두 개의 D자형 코일이 마주하는 형태를 이루는 것이 DD 방식이다.A DD method may be used in addition to the circular method for the current collecting pad or the feeding pad, and the DD method is to form two D-shaped coils facing each other.

도 4의 (a)와 (b)는 DD 방식의 코일이 사용된 경우 공기 배출구의 위치를 보여준다. 모두 코일이 감겨져 있지 않은 코일의 중심부에 위치하여 충전에 영향을 주지 않는 구조이다.4 (a) and (b) show the position of the air outlet when the DD type coil is used. All of them are located in the center of the coil where the coil is not wound, so it has a structure that does not affect charging.

제어부(140)는 공기저장탱크(110)와 공기배출구(130)사이의 밸브를 제어하여 공기저장탱크(110) 내부에 저장된 압축공기가 공기배출구(130)를 통해 분출되어 집전패드와 급전패드 사이의 미세금속 및 이물질이 제거될 수 있도록 한다. The control unit 140 controls the valve between the air storage tank 110 and the air outlet 130 so that the compressed air stored in the air storage tank 110 is ejected through the air outlet 130 between the current collecting pad and the feeding pad. to be able to remove fine metals and foreign substances.

전기자동차(10)가 무선충전소로 진입하면 집전패드(110)와 급전패드(210)의 정렬을 확인하고, 정렬이 확인되면 압축공기가 공기배출구(130)를 통해 강한 힘으로 분출되도록 제어한다. 이를 위해 제어부(140)는 하나이상의 프로세서 및 메모리를 포함한다.When the electric vehicle 10 enters the wireless charging station, the alignment of the current collecting pad 110 and the feeding pad 210 is checked, and when the alignment is confirmed, the compressed air is controlled so that the compressed air is blown out with a strong force through the air outlet 130 . To this end, the controller 140 includes one or more processors and memories.

도 5는 본 발명의 바람직한 어느 실시예에 따라 전기자동차의 충전 시 미세금속을 제거하는 상황을 나타내는 구조도이다.5 is a structural diagram illustrating a situation in which fine metal is removed during charging of an electric vehicle according to a preferred embodiment of the present invention.

무선충전 전기자동차(10)가 무선충전소의 급전패드(210) 위에 위치하면, 급전패드(210)와 집전패드(120) 사이의 거리(d)는 100~250mm이며 이 거리에서도 미세금속과 이물질을 제거하기 위해서는 강한 압축공기가 분출되어야 한다. 바람직하게는 5 ~7Kg/㎠의 압력으로 압축공기가 분출되어야 하므로 최소한 5Kg/㎠ 이상의 압력으로 압축공기가 분출되어야 효과적으로 미세금속을 제거할 수 있다.When the wireless charging electric vehicle 10 is located on the feeding pad 210 of the wireless charging station, the distance (d) between the feeding pad 210 and the current collecting pad 120 is 100 to 250 mm, and even at this distance, fine metal and foreign substances are removed. In order to remove it, strong compressed air must be blown out. Preferably, since compressed air should be blown out at a pressure of 5 ~ 7Kg/cm2, the fine metal can be effectively removed only when the compressed air is blown out at a pressure of at least 5Kg/cm2.

이렇게 본 발명에 따르면 상용 무선 전기자동차의 집전패드에 공기배출구를 설치하여 압축공기를 분출함으로써 FOD에 의해 검출되지 않는 미세금속을 제거할 수 있고, 기존 상용차에 브레이크 작동을 위해 설치된 공기저장탱크를 이용함으로써 원가 상승 없이 미세금속 제거장치를 구현할 수 있는 장점이 있다.In this way, according to the present invention, fine metal not detected by FOD can be removed by installing an air outlet on the collector pad of a commercial wireless electric vehicle and blowing out compressed air, and an air storage tank installed for brake operation in an existing commercial vehicle is used. By doing so, there is an advantage that a fine metal removal device can be implemented without an increase in cost.

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 protection scope of the present invention is not limited to the description and expression of the embodiments explicitly described above. In addition, it is added once again that the protection scope of the present invention cannot be limited due to obvious changes or substitutions in the technical field to which the present invention pertains.

Claims (2)

압축공기를 저장하기 위한 공기저장탱크, 무선전력 수신을 위한 집전패드, 압축공기를 분출하기 위한 공기배출구 및 제어부를 포함하되,
상기 제어부는 하나 이상의 프로세서 및 메모리를 포함하고, 상기 집전패드와 무선 충전소에 설치된 무선충전기의 급전패드의 정렬 후 상기 공기저장탱크와 공기배출구 사이의 밸브를 제어하여 압축공기를 배출시키고,
상기 공기배출구는 상기 집전패드 내부에서 코일이 감겨져 있지 않은 코일의 중심부에 위치하여 설치되는 것이며, 상기 공기배출구를 통해 배출된 압축공기에 의해 상기 집전패드와 상기 급전패드 사이의 미세금속이 제거되도록 하는 것을 특징으로 하는, 미세금속 제거를 위한 장치를 포함하는 전기자동차.
Including an air storage tank for storing compressed air, a collecting pad for wireless power reception, an air outlet for ejecting compressed air, and a control unit,
The control unit includes at least one processor and a memory, and controls the valve between the air storage tank and the air outlet after aligning the power collecting pad and the power feeding pad of the wireless charger installed in the wireless charging station to discharge compressed air,
The air outlet is installed in the center of the coil on which the coil is not wound inside the current collecting pad, and the fine metal between the collecting pad and the power feeding pad is removed by the compressed air discharged through the air outlet. An electric vehicle comprising a device for removing fine metal, characterized in that.
 제1항에 있어서,
상기 공기배출구는 5Kg/㎠ 이상의 압력으로 압축공기를 배출하는 것을 특징으로 하는, 미세금속 제거를 위한 장치를 포함하는 전기자동차.The method of claim 1,
An electric vehicle including a device for removing fine metal, characterized in that the air outlet discharges compressed air at a pressure of 5Kg/cm 2 or more.
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