JP2000354332A - Charging device for electric vehicle - Google Patents

Charging device for electric vehicle

Info

Publication number
JP2000354332A
JP2000354332A JP11161815A JP16181599A JP2000354332A JP 2000354332 A JP2000354332 A JP 2000354332A JP 11161815 A JP11161815 A JP 11161815A JP 16181599 A JP16181599 A JP 16181599A JP 2000354332 A JP2000354332 A JP 2000354332A
Authority
JP
Japan
Prior art keywords
power supply
leakage
relay
electric vehicle
charging
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
JP11161815A
Other languages
Japanese (ja)
Inventor
Kazuhisa Takahashi
和久 高橋
Tetsuhiro Ishikawa
哲浩 石川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Electric Works Co Ltd
Toyota Motor Corp
Original Assignee
Toyota Motor Corp
Matsushita Electric Works Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyota Motor Corp, Matsushita Electric Works Ltd filed Critical Toyota Motor Corp
Priority to JP11161815A priority Critical patent/JP2000354332A/en
Publication of JP2000354332A publication Critical patent/JP2000354332A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B60L3/04—Cutting off the power supply under fault conditions
    • 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
    • B60L3/0069—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to the isolation, e.g. ground fault or leak current
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
    • B60L53/14—Conductive energy transfer
    • B60L53/16—Connectors, e.g. plugs or sockets, specially adapted for charging electric vehicles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
    • H02H11/005—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of too low isolation resistance, too high load, short-circuit; earth fault
    • 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
    • Y02T90/14—Plug-in electric vehicles

Abstract

PROBLEM TO BE SOLVED: To ensure safety by preventing occurrence of troubles, including electric shock accidents. SOLUTION: A plug 20 of a charging device A is connected to a wall socket, and a connector 21 is coupled to the connector 32 of an electric vehicle B so that a simulated leakage is caused to occur by a test circuit 3. When a leakage detecting circuit 2 operates normally, power supply lines L1, L2 are opened once and then closed again, to start charging. If an abnormality occurs to the leakage detecting circuit 2, the power supply lines L1, L2 are opened to inhibit charging. Thus, charging can be started, only when the circuit 2 operates normally so as to prevent troubles, including electric shock accidents. Because the operation of the leakage detecting circuit 2 is checked prior to charging, safety can be ensured and charging can be performed smoothly.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、外部電源を用いて
電気自動車のバッテリを充電する電気自動車用充電装置
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a charging device for an electric vehicle that charges an electric vehicle battery using an external power supply.

【０００２】[0002]

【従来の技術】従来、電気自動車のバッテリに商用電源
のような外部電源を用いて充電するには、商用電源をコ
ネクタを介して電気自動車側の車載充電器に接続し、こ
の車載充電器にて商用電源の交流出力を直流出力に変換
してバッテリに供給することで充電を行っている。2. Description of the Related Art Conventionally, in order to charge a battery of an electric vehicle using an external power supply such as a commercial power supply, a commercial power supply is connected to a vehicle-mounted charger on the electric vehicle side via a connector, and the vehicle-mounted charger is connected to the vehicle-mounted charger. The charging is performed by converting the AC output of a commercial power supply into a DC output and supplying the DC output to a battery.

【０００３】ここで、バッテリを充電する際に充電装置
の高圧側が電気自動車の車体に漏電した場合等を想定
し、コネクタと商用電源との間に漏電遮断器等を設け、
電気自動車側で漏電した場合に回路を遮断するようにな
っている。[0003] Here, on the assumption that the high voltage side of the charging device leaks into the body of the electric vehicle when charging the battery, an earth leakage breaker or the like is provided between the connector and the commercial power supply.
The circuit is cut off when the electric vehicle leaks.

【０００４】[0004]

【発明が解決しようとする課題】しかしながら、漏電遮
断器に異常等があれば充電中に漏電しても回路が遮断さ
れないままの状態が続き、車体に漏電している場合には
人が触れて感電するということも考えられる。However, if there is an abnormality or the like in the earth leakage breaker, the circuit remains uninterrupted even if the earth leaks during charging. You may also get an electric shock.

【０００５】本発明は上記事情に鑑みて為されたもので
あり、請求項１の発明の目的とするところは、感電事故
等の不具合の発生を防止し安全を確保することができる
電気自動車用充電装置を提供することにある。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an electric vehicle capable of preventing a trouble such as an electric shock accident and ensuring safety. It is to provide a charging device.

【０００６】また、請求項２の発明の目的とするところ
は、請求項１の発明の目的に加えて、漏電が発生して回
路が遮断された場合に電気自動車側に漏電で遮断された
ことを知らせるようにした電気自動車用充電装置を提供
することにある。Another object of the invention of claim 2 is that, in addition to the object of the invention of claim 1, when an electric leakage occurs and the circuit is interrupted, the electric vehicle is interrupted by the electric leakage. To provide a charging device for an electric vehicle that informs the user of the charging.

【０００７】[0007]

【課題を解決するための手段】請求項１の発明は、上記
目的を達成するために、電気自動車のバッテリを外部電
源を用いて充電するための電気自動車用充電装置であっ
て、外部電源から電気自動車への給電経路を開閉するリ
レーと、給電経路に流れる電流に基づいて漏電を検出す
る漏電検出手段と、外部電源から給電経路への給電開始
時に擬似的に漏電を発生させる疑似漏電発生手段と、漏
電検出手段にて漏電が検出された場合にリレーを制御し
て給電経路を開路するとともに給電開始時には開路した
給電経路を閉路する制御手段とを備えたことを特徴と
し、外部電源を用いて充電するのに先立って疑似漏電発
生手段によって漏電検出手段や制御手段等が漏電発生時
に正常に動作するかを確認することができ、しかも漏電
検出手段や制御手段が正常に動作して給電経路が開路し
た場合に制御手段が給電経路を再び閉路するから、正常
に動作するときのみ充電を開始できるようにして感電事
故等の不具合の発生を防止し安全を確保することができ
る。In order to achieve the above object, a first aspect of the present invention is a charging device for an electric vehicle for charging a battery of an electric vehicle using an external power supply. A relay for opening and closing a power supply path to an electric vehicle, a leakage detection means for detecting a leakage based on a current flowing through the power supply path, and a pseudo leakage generation means for generating a pseudo leakage when an external power supply starts supplying power to the power supply path And a control means for controlling a relay to open the power supply path when the leakage detection is detected by the leakage detection means and closing the opened power supply path at the start of power supply, using an external power supply. Prior to charging the battery, it is possible to confirm whether the leak detecting means and the control means operate normally when the leak occurs by the pseudo leak generating means, and furthermore, the leak detecting means and the controlling means. When the power supply path is normally operated and the power supply path is opened, the control means closes the power supply path again, so that charging can be started only when the operation is normal, thereby preventing the occurrence of a malfunction such as an electric shock accident and ensuring safety. be able to.

【０００８】請求項２の発明は、請求項１の発明におい
て、電気自動車側からリレーをオンオフするための制御
信号が伝送される信号線と、漏電検出手段にて漏電が検
出された場合に信号線を介して電気自動車側に漏電検出
信号を伝送する伝送手段とを備えたことを特徴とし、漏
電が発生して回路が遮断された場合に電気自動車側に漏
電で遮断されたことを知らせることができて使い勝手の
向上が図れる。しかも、制御信号が伝送される信号線を
介して漏電検出信号を伝送することにより、電気自動車
との間の配線を簡素化することができる。According to a second aspect of the present invention, in the first aspect of the present invention, a signal line through which a control signal for turning on and off a relay is transmitted from the electric vehicle side, and a signal when an electric leakage is detected by electric leakage detection means. Transmission means for transmitting an electric leakage detection signal to the electric vehicle side via a line, wherein when the electric leakage occurs and the circuit is interrupted, the electric vehicle side is notified that the electric leakage has been interrupted. To improve usability. Moreover, by transmitting the leakage detection signal via the signal line through which the control signal is transmitted, wiring between the electric vehicle and the electric vehicle can be simplified.

【０００９】[0009]

【発明の実施の形態】以下、図面を参照して本発明を実
施形態により詳細に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings.

【００１０】図１は本実施形態における概略回路構成を
示している。電気自動車Ｂは、動力源となるモータ（図
示せず）に電力を供給するバッテリ３０、外部電源たる
商用電源（図示せず）から本発明に係る充電装置Ａを介
して供給される交流電力を直流電力に変換してバッテリ
３０を充電する車載充電器３１、車載充電器３１を充電
装置Ａに接続するためのコネクタ３２、車載充電器３１
からバッテリ３０への充電路に挿入されたリレー接点３
３、車載充電器３１に供給される交流出力を検出するた
めの検出部３４、検出部３４の検出結果に応じてリレー
接点３３をオンオフする充電制御装置３５を具備する。
すなわち、充電制御装置３５は検出部３４によって交流
出力が検出されている場合にリレー接点３３をオンして
車載充電器３１によりバッテリ３０を充電し、検出部３
４によって交流出力が検出されていない場合にはリレー
接点３３をオフして車載充電器３１によるバッテリ３０
の充電を停止する。FIG. 1 shows a schematic circuit configuration in the present embodiment. The electric vehicle B includes a battery 30 for supplying power to a motor (not shown) serving as a power source, and AC power supplied from a commercial power supply (not shown) as an external power supply via the charging device A according to the present invention. In-vehicle charger 31 for converting battery power into DC power, connector 32 for connecting in-vehicle charger 31 to charging device A, in-vehicle charger 31
Relay contact 3 inserted in charging path from battery to battery 30
3. A detection unit 34 for detecting the AC output supplied to the on-board charger 31 and a charging control device 35 for turning on and off the relay contact 33 according to the detection result of the detection unit 34.
That is, when the AC output is detected by the detection unit 34, the charging control device 35 turns on the relay contact 33, charges the battery 30 by the on-board charger 31, and
4, the relay contact 33 is turned off and the battery 30
Stop charging.

【００１１】一方、充電装置Ａは、商用電源を供給する
ためのコンセント（図示せず）に抜き差し自在に接続さ
れる接地極付のプラグ２０と、電気自動車Ｂのコネクタ
３２に接続されるコネクタ２１と、プラグ２０とコネク
タ２１の間に形成される給電経路Ｌ１，Ｌ２及び接地線
Ｌ３の途中に設けられる漏電遮断部１とで構成される。
ここで、コネクタ２１には給電経路Ｌ１，Ｌ２及び接地
線Ｌ３の他に電気自動車Ｂの充電制御装置３５との間で
信号の授受を行うための信号線Ｌｓが接続されている。
また、この信号線Ｌｓは漏電遮断部１内で接地線Ｌ３と
接続されている。On the other hand, the charging device A includes a plug 20 with a ground electrode that is detachably connected to an outlet (not shown) for supplying commercial power, and a connector 21 that is connected to the connector 32 of the electric vehicle B. And the power supply paths L1 and L2 formed between the plug 20 and the connector 21 and the earth leakage breaker 1 provided in the middle of the ground line L3.
Here, a signal line Ls for transmitting and receiving signals to and from the charging control device 35 of the electric vehicle B is connected to the connector 21 in addition to the power supply paths L1 and L2 and the ground line L3.
Further, the signal line Ls is connected to the ground line L3 in the earth leakage cutoff unit 1.

【００１２】漏電遮断部１は、給電経路Ｌ１，Ｌ２に挿
入された常開型のリレー接点ｒ1a，ｒ1bを有するリレー
Ｒｙ１と、給電経路Ｌ１，Ｌ２が貫通する零相変流器Ｚ
ＣＴと、零相変流器ＺＣＴの出力（不平衡電流）に基づ
いて漏電を検出する漏電検出回路２と、漏電発生時に給
電経路Ｌ１，Ｌ２が確実に開路するか否かをテスト（試
験）するための試験回路３と、リレー接点ｒ1a，ｒ1bよ
りもプラグ２０側においてリレーＲｙ１の励磁コイルを
介して給電経路Ｌ１，Ｌ２間に直列接続された常開型の
リレー接点ｒ２を有し漏電検出回路２によって駆動され
る漏電遮断用リレーＲｙ２と、給電経路Ｌ１，Ｌ２間に
リレー接点ｒ２と直列に接続された常開型のリレー接点
ｒ３を有し励磁コイルが信号線Ｌｓに挿入された充電制
御用リレーＲｙ３と、信号線Ｌｓと接地線Ｌ３の間に抵
抗Ｒ１を介して充電制御用リレーＲｙ３と並列に接続さ
れた常開型のリレー接点ｒ４を有し漏電検出回路２によ
って駆動される信号伝送用リレーＲｙ４と、零相変流器
ＺＣＴを挟んで給電経路Ｌ１，Ｌ２間に抵抗Ｒ２ととも
に直列接続された常開型のリレー接点ｒ５を有し試験回
路３によって駆動される試験用リレーＲｙ５とを具備す
る。The leakage breaker 1 includes a relay Ry1 having normally open relay contacts r1a and r1b inserted into the power supply paths L1 and L2, and a zero-phase current transformer Z through which the power supply paths L1 and L2 pass.
A leakage detection circuit 2 for detecting leakage based on the output of CT and the zero-phase current transformer ZCT (unbalanced current), and testing whether the power supply paths L1 and L2 are reliably opened when leakage occurs (test) And a normally open relay contact r2 connected in series between the power supply paths L1 and L2 via the excitation coil of the relay Ry1 on the plug 20 side of the relay contacts r1a and r1b. A charging device having a ground leakage relay Ry2 driven by the circuit 2, a normally open relay contact r3 connected in series with the relay contact r2 between the power supply paths L1 and L2, and an excitation coil inserted into the signal line Ls. It has a control relay Ry3 and a normally open relay contact r4 connected in parallel with the charging control relay Ry3 via a resistor R1 between the signal line Ls and the ground line L3, and is driven by the electric leakage detection circuit 2. signal A test relay Ry5 having a normally open relay contact r5 connected in series with a resistor R2 between power feeding paths L1 and L2 across a zero-phase current transformer ZCT and driven by a test circuit 3 and a transmission relay Ry4. And

【００１３】ここで、漏電遮断部１にはプラグ２０を介
して商用電源から各部の動作用電源を作成する電源回路
（図示せず）が設けてあり、プラグ２０をコンセントに
接続した時点から電源回路が漏電検出回路２に動作用電
源を供給する。而して、電源回路から動作用電源の供給
が開始されると、漏電検出回路２が漏電遮断用リレーＲ
ｙ２を駆動してリレー接点ｒ２をオンする。またコネク
タ２１を電気自動車Ｂのコネクタ３２に接続すれば、充
電制御装置３５が充電モードに移行して信号線ＬｓをＨ
レベルとして充電制御用リレーＲｙ３を駆動してリレー
接点ｒ３をオンする。その結果、リレーＲｙ１の励磁コ
イルに商用電源から電流が流れてリレー接点ｒ1a，ｒ1b
がオンして給電経路Ｌ１，Ｌ２が閉路され、商用電源か
ら電気自動車Ｂの車載充電器３１に対して交流電力が供
給される。A power supply circuit (not shown) is provided in the earth leakage cutoff unit 1 for generating operation power for each unit from a commercial power supply via a plug 20. The power supply circuit starts when the plug 20 is connected to an outlet. The circuit supplies power for operation to the leakage detection circuit 2. Thus, when the supply of the operating power from the power supply circuit is started, the leakage detection circuit 2 sets the leakage interrupting relay R
Drive y2 to turn on relay contact r2. When the connector 21 is connected to the connector 32 of the electric vehicle B, the charging control device 35 shifts to the charging mode and sets the signal line Ls to the H level.
As a level, the charging control relay Ry3 is driven to turn on the relay contact r3. As a result, current flows from the commercial power supply to the exciting coil of the relay Ry1, and the relay contacts r1a, r1b
Is turned on, the power supply paths L1 and L2 are closed, and AC power is supplied from the commercial power supply to the vehicle-mounted charger 31 of the electric vehicle B.

【００１４】また、電気自動車Ｂ側あるいは充電装置Ａ
側で漏電が発生した場合には零相変流器ＺＣＴの出力側
に不平衡電流が流れるから、この不平衡電流を漏電検出
回路２にて検出する。不平衡電流のレベルが所定値以上
であれば漏電が生じているものと判断して漏電検出回路
２は漏電遮断用リレーＲｙ２を駆動してリレー接点ｒ２
をオフする。その結果、リレーＲｙ１には励磁電流が流
れなくなるからリレー接点ｒ1a，ｒ1bがオフして給電経
路Ｌ１，Ｌ２が開路され、漏電による感電事故等の不具
合の発生が防止できる。The electric vehicle B or the charging device A
If a leakage occurs on the side, an unbalanced current flows on the output side of the zero-phase current transformer ZCT, and the unbalanced current is detected by the leakage detection circuit 2. If the level of the unbalanced current is equal to or more than a predetermined value, it is determined that a leakage has occurred, and the leakage detection circuit 2 drives the leakage cut-off relay Ry2 to contact the relay contact r2.
Turn off. As a result, the exciting current stops flowing through the relay Ry1, so that the relay contacts r1a and r1b are turned off and the power supply paths L1 and L2 are opened, thereby preventing the occurrence of a trouble such as an electric shock accident due to a short circuit.

【００１５】ここで、漏電検出回路２は、漏電検出時に
信号伝送用リレーＲｙ４を駆動してリレー接点ｒ４をオ
ンすることにより、信号線Ｌｓをリレー接点ｒ４及び抵
抗Ｒ１を介して接地線Ｌ３に接続して信号線Ｌｓのレベ
ルをＬレベルに落とし、これによって漏電検出信号を信
号線Ｌｓを介して電気自動車Ｂの充電制御装置３５に伝
送する。つまり、電気自動車Ｂ側では信号線ＬｓがＬレ
ベルに変化することで漏電検出信号を受け取り、漏電の
発生を知ることができるから、使い勝手の向上が図れる
ものである。しかも、充電制御装置３５から充電装置Ａ
の充電制御用リレーＲｙ３を駆動する制御信号が伝送さ
れる信号線Ｌｓによって漏電検出信号を伝送するように
しているから、漏電検出信号を伝送するための信号線を
別途設ける必要が無く、充電装置Ａと電気自動車Ｂとの
間の配線を簡素化することができるという利点がある。Here, the leakage detection circuit 2 drives the signal transmission relay Ry4 at the time of leakage detection to turn on the relay contact r4, thereby connecting the signal line Ls to the ground line L3 via the relay contact r4 and the resistor R1. By connecting, the level of the signal line Ls is lowered to the L level, whereby the leakage detection signal is transmitted to the charging control device 35 of the electric vehicle B via the signal line Ls. That is, the electric vehicle B receives the leakage detection signal when the signal line Ls changes to the L level, and can detect the occurrence of the leakage, thereby improving the usability. In addition, the charging device A
Since the leakage detection signal is transmitted by the signal line Ls through which the control signal for driving the charging control relay Ry3 is transmitted, there is no need to separately provide a signal line for transmitting the leakage detection signal, and the charging device There is an advantage that wiring between A and the electric vehicle B can be simplified.

【００１６】次に本発明の要旨である試験回路３の動作
について、図２のフローチャートを参照して説明する。Next, the operation of the test circuit 3 according to the gist of the present invention will be described with reference to the flowchart of FIG.

【００１７】充電装置Ａのプラグ２０をコンセントに接
続するとともにコネクタ２１を電気自動車Ｂのコネクタ
３２に接続すれば（Ｓ１）、上述のように漏電遮断用リ
レーＲｙ２が駆動されてリレー接点ｒ２がオンし（Ｓ
２）、また信号線Ｌｓの電圧（制御信号）が充電制御装
置３５によってＨレベルとされ（Ｓ３）、充電制御用リ
レーＲｙ３が駆動されてリレー接点ｒ３がオンする（Ｓ
４）。その結果、リレーＲｙ１が駆動されてリレー接点
ｒ1a，ｒ1bがオンして給電経路Ｌ１，Ｌ２が閉路される
（Ｓ５）。When the plug 20 of the charging device A is connected to the outlet and the connector 21 is connected to the connector 32 of the electric vehicle B (S1), the leakage cutoff relay Ry2 is driven to turn on the relay contact r2 as described above. (S
2) Further, the voltage (control signal) of the signal line Ls is set to the H level by the charge control device 35 (S3), and the charge control relay Ry3 is driven to turn on the relay contact r3 (S3).
4). As a result, the relay Ry1 is driven, the relay contacts r1a, r1b are turned on, and the power supply paths L1, L2 are closed (S5).

【００１８】試験回路３は信号線Ｌｓの電圧を監視して
おり、給電開始時点から最初に信号線Ｌｓの電圧がＨレ
ベルとなった時点で試験用リレーＲｙ５を駆動してリレ
ー接点ｒ５をオンすることで擬似的な漏電電流を流す
（Ｓ６）。また、漏電遮断部１には図示しないタイマ回
路が設けてあり、試験回路３が試験用リレーＲｙ５を駆
動してからの時間をカウントしている。そして、タイマ
回路で１秒間がカウントされると試験回路３は試験用リ
レーＲｙ５の駆動を停止してリレー接点ｒ５をオフす
る。The test circuit 3 monitors the voltage of the signal line Ls, and drives the test relay Ry5 to turn on the relay contact r5 when the voltage of the signal line Ls first becomes H level from the start of power supply. This causes a pseudo leakage current to flow (S6). The earth leakage cutoff unit 1 is provided with a timer circuit (not shown), and counts the time since the test circuit 3 drives the test relay Ry5. When one second is counted by the timer circuit, the test circuit 3 stops driving the test relay Ry5 and turns off the relay contact r5.

【００１９】而して、漏電検出回路２が正常ならば、試
験回路３によって流される擬似的な漏電電流に基づいて
漏電を検出し（Ｓ７）、漏電遮断用リレーＲｙ２を駆動
してリレー接点ｒ２をオフし（Ｓ８）、リレーＲｙ1の
駆動を停止することでリレー接点ｒ1a，ｒ1bをオフして
給電経路Ｌ１，Ｌ２を開路する（Ｓ９）。さらに漏電検
出回路２は信号伝送用リレーＲｙ４を駆動してリレー接
点ｒ４をオンする（Ｓ１０）。これにより、信号線Ｌｓ
の電圧がＬレベルに低下することで漏電検出信号が電気
自動車Ｂの充電制御装置３５に伝送される（Ｓ１１）。
信号線Ｌｓを介して漏電検出信号を受け取った充電制御
装置３５は、漏電遮断部１が正常に動作しているものと
判断する。If the leakage detection circuit 2 is normal, the leakage is detected based on the pseudo leakage current flowing by the test circuit 3 (S7), and the leakage cut-off relay Ry2 is driven to activate the relay contact r2. Is turned off (S8), and the driving of the relay Ry1 is stopped to turn off the relay contacts r1a and r1b to open the power supply paths L1 and L2 (S9). Further, the leakage detection circuit 2 drives the signal transmission relay Ry4 to turn on the relay contact r4 (S10). Thereby, the signal line Ls
Is dropped to the L level, a leakage detection signal is transmitted to the charging control device 35 of the electric vehicle B (S11).
The charging control device 35 that has received the leakage detection signal via the signal line Ls determines that the leakage interrupting unit 1 is operating normally.

【００２０】また、試験回路３は試験用リレーＲｙ５の
駆動を停止してから約２秒後に漏電検出回路２をリセッ
トする（Ｓ１２）。リセットされた漏電検出回路２は漏
電遮断用リレーＲｙ２を駆動してリレー接点ｒ２をオン
するとともに（Ｓ１３）、信号伝送用リレーＲｙ４の駆
動を停止してリレー接点ｒ４をオフする（Ｓ１４）。リ
レー接点ｒ４がオフすれば信号線Ｌｓの電圧がＨレベル
に戻るため、充電制御用リレーＲｙ３が駆動されてリレ
ー接点ｒ３がオンとなる。その結果、リレーＲｙ１が駆
動されてリレー接点ｒ1a，ｒ1bがオンして給電回路Ｌ
１，Ｌ２が閉路され（Ｓ１５）、充電が開始される（Ｓ
１６）。The test circuit 3 resets the leakage detection circuit 2 about two seconds after stopping the driving of the test relay Ry5 (S12). The reset leakage detection circuit 2 drives the leakage cut-off relay Ry2 to turn on the relay contact r2 (S13), and stops driving the signal transmission relay Ry4 to turn off the relay contact r4 (S14). When the relay contact r4 is turned off, the voltage of the signal line Ls returns to the H level, so that the charging control relay Ry3 is driven and the relay contact r3 is turned on. As a result, the relay Ry1 is driven, the relay contacts r1a and r1b are turned on, and the power supply circuit L
1, L2 are closed (S15), and charging is started (S15).
16).

【００２１】一方、漏電検出回路２に異常があって漏電
が検出されない場合（Ｓ７）、漏電遮断用リレーＲｙ２
が駆動されたままとなってリレー接点ｒ２がオンのまま
となり、また信号伝送用リレーＲｙ４が駆動されないた
めに信号線Ｌｓの電圧がＨレベルのまま変化しない（Ｓ
１７）。そこで、充電制御装置３５は信号線Ｌｓの電圧
がＬレベルに変化しないことから漏電検出回路２に何ら
かの異常が生じているものと判断し、信号線Ｌｓの電圧
を略ゼロとし（Ｓ１８）、充電制御用リレーＲｙ３の駆
動を停止してリレー接点ｒ３をオフする（Ｓ１９）。そ
の結果、リレーＲｙ１には駆動電流が供給されなくなっ
てリレー接点ｒ1a，ｒ1bがオフして給電経路Ｌ１，Ｌ２
が開路され（Ｓ２０）、充電が中止される（Ｓ２１）。On the other hand, if the leakage detection circuit 2 has an abnormality and no leakage is detected (S7), the leakage interruption relay Ry2
Remain driven, the relay contact r2 remains on, and the voltage of the signal line Ls remains unchanged at the H level because the signal transmission relay Ry4 is not driven (S
17). Therefore, the charging control device 35 determines that some abnormality has occurred in the leakage detection circuit 2 since the voltage of the signal line Ls does not change to the L level, and sets the voltage of the signal line Ls to substantially zero (S18), and performs charging. The driving of the control relay Ry3 is stopped, and the relay contact r3 is turned off (S19). As a result, the drive current is not supplied to the relay Ry1 and the relay contacts r1a and r1b are turned off, so that the power supply paths L1 and L2
Is opened (S20), and charging is stopped (S21).

【００２２】上述のように本実施形態では、充電に先立
って試験回路３により擬似的な漏電を発生させて漏電検
出回路２が正常に動作するか否かを確認し、正常に動作
しない、つまり給電経路Ｌ１，Ｌ２が開路されない場合
には、充電制御用リレーＲｙ３のリレー接点ｒ３をオフ
することでリレーＲｙ１の駆動を停止してリレー接点ｒ
1a，ｒ1bをオフして給電経路Ｌ１，Ｌ２を開路させるか
ら、正常に動作するときのみ充電を開始できるようにし
て感電事故等の不具合の発生を防止して安全を確保する
ことができ、充電を円滑に行うことができる。しかも、
充電装置Ａのプラグ２０をコンセントに接続するととも
にコネクタ２１を電気自動車Ｂのコネクタ３２に接続す
ることで自動的に上記確認作業が行えるため、非常に使
い勝手がよいものである。As described above, in the present embodiment, prior to charging, the test circuit 3 generates a pseudo leakage and confirms whether or not the leakage detection circuit 2 operates normally. When the power supply paths L1 and L2 are not opened, the driving of the relay Ry1 is stopped by turning off the relay contact r3 of the charging control relay Ry3, and the relay contact r
1a and r1b are turned off to open the power supply paths L1 and L2, so that charging can be started only when the operation is normal, preventing the occurrence of a malfunction such as an electric shock accident and ensuring safety. Can be performed smoothly. Moreover,
By connecting the plug 20 of the charging device A to the outlet and connecting the connector 21 to the connector 32 of the electric vehicle B, the above-mentioned checking operation can be performed automatically, so that it is very convenient.

【００２３】[0023]

【発明の効果】請求項１の発明は、電気自動車のバッテ
リを外部電源を用いて充電するための電気自動車用充電
装置であって、外部電源から電気自動車への給電経路を
開閉するリレーと、給電経路に流れる電流に基づいて漏
電を検出する漏電検出手段と、外部電源から給電経路へ
の給電開始時に擬似的に漏電を発生させる疑似漏電発生
手段と、漏電検出手段にて漏電が検出された場合にリレ
ーを制御して給電経路を開路するとともに給電開始時に
は開路した給電経路を閉路する制御手段とを備えたの
で、外部電源を用いて充電するのに先立って疑似漏電発
生手段によって漏電検出手段や制御手段等が漏電発生時
に正常に動作するかを確認することができ、しかも漏電
検出手段や制御手段が正常に動作して給電経路が開路し
た場合に制御手段が給電経路を再び閉路するから、正常
に動作するときのみ充電を開始できるようにして感電事
故等の不具合の発生を防止し安全を確保することができ
るという効果がある。According to the first aspect of the present invention, there is provided a charging device for an electric vehicle for charging a battery of an electric vehicle using an external power supply, comprising: a relay for opening and closing a power supply path from the external power supply to the electric vehicle; Leakage detecting means for detecting a leakage based on the current flowing in the power supply path, pseudo-leakage generation means for generating a pseudo-leakage when power supply from the external power supply to the power supply path is started, and leakage detection is detected by the leakage detection means Control means for controlling the relay in order to open the power supply path and closing the open power supply path at the start of power supply, so that prior to charging using the external power supply, the leakage detection means is provided by the pseudo-leakage generation means. It is possible to check whether or not the power supply path and the control means operate normally when an electric leakage occurs, and if the power supply path is opened when the electric leakage detection means and the control means operate normally. Since for closing a conductive path again, there is an effect that it is possible to ensure preventing the occurrence of problems such as electric shock as can only start charging when operating properly secure.

【００２４】請求項２の発明は、電気自動車側からリレ
ーをオンオフするための制御信号が伝送される信号線
と、漏電検出手段にて漏電が検出された場合に信号線を
介して電気自動車側に漏電検出信号を伝送する伝送手段
とを備えたので、漏電が発生して回路が遮断された場合
に電気自動車側に漏電で遮断されたことを知らせること
ができて使い勝手の向上が図れ、しかも、制御信号が伝
送される信号線を介して漏電検出信号を伝送することに
より、電気自動車との間の配線を簡素化することができ
るという効果がある。According to a second aspect of the present invention, the electric vehicle transmits a control signal for turning on and off a relay from the electric vehicle and a signal line when the electric leakage is detected by the electric leakage detection means. And a transmission means for transmitting a leakage detection signal to the vehicle, so that when a leakage occurs and the circuit is interrupted, it is possible to notify the electric vehicle that the interruption was caused by the leakage, thereby improving usability, and By transmitting the leakage detection signal via the signal line through which the control signal is transmitted, there is an effect that the wiring between the electric vehicle and the electric vehicle can be simplified.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明の一実施形態を示す概略回路構成図であ
る。FIG. 1 is a schematic circuit configuration diagram showing an embodiment of the present invention.

【図２】同上の動作説明用のフローチャートである。FIG. 2 is a flowchart for explaining the operation of the above.

【符号の説明】[Explanation of symbols]

１ 漏電遮断部 ２ 漏電検出回路 ３ 試験回路 Ｒｙ１ リレー Ｒｙ２ 漏電遮断用リレー Ｒｙ３ 充電制御用リレー Ｒｙ４ 信号伝送用リレー Ｒｙ５ 試験用リレー ＺＣＴ 零相変流器 Ｌ１，Ｌ２ 給電経路 Ｌｓ 信号線 DESCRIPTION OF SYMBOLS 1 Leakage cutoff part 2 Leakage detection circuit 3 Test circuit Ry1 relay Ry2 Leakage cutoff relay Ry3 Charge control relay Ry4 Signal transmission relay Ry5 Test relay ZCT Zero-phase current transformer L1, L2 Feeding path Ls Signal line

フロントページの続き (72)発明者 石川 哲浩 愛知県豊田市トヨタ町１番地 トヨタ自動 車株式会社内 Ｆターム(参考） 5G003 AA01 BA01 CA11 CC02 EA08 FA04 5G004 AA05 AB02 BA01 CA02 CA08 DA01 DC06 5G058 BB02 BC04 BC16 BD10 BD11Continuation of the front page (72) Inventor Tetsuhiro Ishikawa 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Motor Co., Ltd. F term (reference) 5G003 AA01 BA01 CA11 CC02 EA08 FA04 5G004 AA05 AB02 BA01 CA02 CA08 DA01 DC06 5G058 BB02 BC04 BC16 BD10 BD11

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】 電気自動車のバッテリを外部電源を用い
て充電するための電気自動車用充電装置であって、外部
電源から電気自動車への給電経路を開閉するリレーと、
給電経路に流れる電流に基づいて漏電を検出する漏電検
出手段と、外部電源から給電経路への給電開始時に擬似
的に漏電を発生させる疑似漏電発生手段と、漏電検出手
段にて漏電が検出された場合にリレーを制御して給電経
路を開路するとともに給電開始時には開路した給電経路
を閉路する制御手段とを備えたことを特徴とする電気自
動車用充電装置。1. An electric vehicle charging device for charging a battery of an electric vehicle using an external power supply, comprising: a relay for opening and closing a power supply path from the external power supply to the electric vehicle;
Leakage detecting means for detecting a leakage based on the current flowing in the power supply path, pseudo-leakage generation means for generating a pseudo-leakage when power supply from the external power supply to the power supply path is started, and leakage detection is detected by the leakage detection means And a control means for controlling a relay to open the power supply path and closing the open power supply path at the start of power supply. 【請求項２】 電気自動車側からリレーをオンオフする
ための制御信号が伝送される信号線と、漏電検出手段に
て漏電が検出された場合に信号線を介して電気自動車側
に漏電検出信号を伝送する伝送手段とを備えたことを特
徴とする請求項１記載の電気自動車用充電装置。2. A signal line through which a control signal for turning on and off a relay is transmitted from the electric vehicle side, and a leakage detection signal to the electric vehicle side via the signal line when leakage detection is detected by the leakage detection means. The charging device for an electric vehicle according to claim 1, further comprising a transmission unit that transmits the electric vehicle.
JP11161815A 1999-06-09 1999-06-09 Charging device for electric vehicle Withdrawn JP2000354332A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11161815A JP2000354332A (en) 1999-06-09 1999-06-09 Charging device for electric vehicle

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Publication Number Publication Date
JP2000354332A true JP2000354332A (en) 2000-12-19

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