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JP5104803B2 - Method for detecting closed closure of charging system, charger and relay - Google Patents

Method for detecting closed closure of charging system, charger and relay Download PDF

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Publication number
JP5104803B2
JP5104803B2 JP2009086199A JP2009086199A JP5104803B2 JP 5104803 B2 JP5104803 B2 JP 5104803B2 JP 2009086199 A JP2009086199 A JP 2009086199A JP 2009086199 A JP2009086199 A JP 2009086199A JP 5104803 B2 JP5104803 B2 JP 5104803B2
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charging
relay
vehicle
charger
power
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JP2010238576A (en
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博臣 舩越
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Tokyo Electric Power Co Holdings Inc
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Tokyo Electric Power Co Inc
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H47/002—Monitoring or fail-safe circuits
    • H01H47/004—Monitoring or fail-safe circuits using plural redundant serial connected relay operated contacts in controlled circuit
    • H01H47/005—Safety control circuits therefor, e.g. chain of relays mutually monitoring each other
    • 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
    • B60L53/18—Cables specially adapted for charging electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/60—Monitoring or controlling charging stations
    • B60L53/67—Controlling two or more charging stations
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/001—Means for preventing or breaking contact-welding
    • 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)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Description

本発明は、電動車両の充電システムに関し、特に、電動車両の車両側コネクタおよび車載バッテリ間のリレーの閉固着を検出する技術に関する。   The present invention relates to a charging system for an electric vehicle, and more particularly, to a technique for detecting closed adhesion of a relay between a vehicle-side connector of an electric vehicle and an in-vehicle battery.

近年、駐車場、専用の充電スタンド等、様々な箇所に設置された充電器による充電が可能な電動車両の開発が進んでいる。このような電動車両では、通常、充電に際して充電器の充電器側コネクタが装着される車両側コネクタと車載バッテリとの間の充電用ラインにリレーが配置されており、充電中以外は、このリレーを開放することにより、車両側コネクタの端子に車載バッテリの電圧が印加されないように工夫されている。   In recent years, development of electric vehicles that can be charged by chargers installed in various places such as parking lots and dedicated charging stands has been progressing. In such an electric vehicle, normally, a relay is disposed on a charging line between the vehicle-side connector to which the charger-side connector of the charger is mounted for charging and the in-vehicle battery. It is devised so that the voltage of the in-vehicle battery is not applied to the terminal of the vehicle-side connector by opening.

しかしながら、リレーを開放制御したにもかかわらず、故障等の理由により、リレーが閉成したまま開放しない場合がある。この現象は閉固着あるいは溶着と呼ばれている。特許文献１には、モータ、インバータ等の負荷と車載バッテリとの間の電力ラインを構成する正極側および負極側ラインのそれぞれに配置されたリレーが両方とも溶着する前に、少なくとも片方のリレーの溶着を検出することが可能なリレー溶着検出装置が開示されている。このリレー溶着検出装置は、一方のリレーを閉成制御するとともに他方のリレーを開放制御し、そのときの負荷への入力電圧を電圧計で計測することによって、一方のリレーの溶着を検出する。また、開閉制御するリレーを入れ替えて同様の処理を行うことによって他方のリレーの溶着も検出する。   However, although the relay is controlled to open, there are cases where the relay is not opened due to a failure or the like. This phenomenon is called closed adhesion or welding. In Patent Document 1, before both of the relays arranged on the positive electrode side and the negative electrode side line constituting the power line between a load such as a motor and an inverter and the in-vehicle battery are welded, at least one of the relays A relay welding detection device capable of detecting welding is disclosed. This relay welding detection device detects the welding of one relay by controlling the closing of one relay and controlling the opening of the other relay and measuring the input voltage to the load at that time with a voltmeter. Moreover, the welding of the other relay is also detected by replacing the relay to be opened / closed and performing the same process.

特開２００６−３１０２１９号公報JP 2006-310219 A

特許文献１に記載のリレー溶着検出装置を電動車両の車両側コネクタおよび車載バッテリ間のリレーの閉固着検出に適用することも可能である。しかし、この場合、電動車両に、車載バッテリの出力電圧を計測する電圧計とは別に、車両側コネクタおよびリレー間の充電用ラインの電圧を計測する電圧計を搭載する必要が生じるため、電動車両側に、リレーの閉固着検出のための追加的なコストがかかる。また、リレーの開閉制御は、例えば電動車両に搭載されたＥＣＵ（エレクトリックコントロールユニット）が行うことになるが、このＥＣＵが誤作動して、充電中でないにもかかわらずリレーを閉成制御した場合に、車両側コネクタの端子に車載バッテリの電圧が印加されてしまう。   It is also possible to apply the relay welding detection device described in Patent Document 1 to detection of closed adhesion of a relay between a vehicle-side connector of an electric vehicle and an in-vehicle battery. However, in this case, the electric vehicle needs to be equipped with a voltmeter that measures the voltage of the charging line between the vehicle-side connector and the relay, in addition to the voltmeter that measures the output voltage of the in-vehicle battery. On the other hand, there is an additional cost for detecting the closed closure of the relay. In addition, the relay open / close control is performed by, for example, an ECU (Electric Control Unit) mounted on the electric vehicle. When the ECU malfunctions and the relay is closed even though charging is not being performed, In addition, the voltage of the in-vehicle battery is applied to the terminal of the vehicle-side connector.

本発明は、上記事情に鑑みてなされたものであり、本発明の目的は、電動車両側に追加的なコストをかけることなくリレーの閉固着を検出でき、かつ充電中以外はリレーを確実に開放できる技術を提供することにある。   The present invention has been made in view of the above circumstances, and it is an object of the present invention to detect the closed adhering of the relay without incurring additional cost on the electric vehicle side, and to ensure the relay except during charging. It is to provide technology that can be opened.

上記課題を解決するために、本発明では、電動車両の車両側コネクタおよび車載バッテリ間の充電用ラインに配置されたリレーを、車両側コネクタを介して充電器から給電される制御用電力により動作させる。電動車両は、車載バッテリの充電開始に先立って、リレーを閉成制御し、車両側コネクタを介して充電器から給電される充電用電力により車載バッテリが充電されるのを待ち、車載バッテリの充電終了後に、リレーを開放制御するとともに、充電器から通知された充電用電力の出力電圧の計測値に基づいてリレーの閉固着を検出する。一方、充電器は、車載バッテリの充電開始に先立って、車両側コネクタに装着された充電器側コネクタを介して制御用電力の供電を開始し、車載バッテリの充電終了による充電用電力の供電停止後も、制御用電力の供電を継続するとともに、充電用電力の出力電圧を計測し電動車両に通知する。   In order to solve the above problems, in the present invention, a relay disposed on a charging line between a vehicle-side connector of an electric vehicle and a vehicle-mounted battery is operated by control power supplied from a charger via the vehicle-side connector. Let Prior to the start of charging the in-vehicle battery, the electric vehicle controls the closing of the relay, waits for the in-vehicle battery to be charged by the charging power supplied from the charger via the vehicle-side connector, and charges the in-vehicle battery. After the completion, the relay is controlled to be opened, and the closed contact of the relay is detected based on the measured value of the output voltage of the charging power notified from the charger. On the other hand, the charger starts supplying control power via the charger-side connector attached to the vehicle-side connector prior to the start of charging of the vehicle-mounted battery, and stops supplying power for charging when charging of the vehicle-mounted battery ends. After that, while continuing to supply the control power, the output voltage of the charging power is measured and notified to the electric vehicle.

例えば、本発明は、電動車両と、前記電動車両の車載バッテリに充電用電力を供電する充電器と、を有する充電システムであって、
前記電動車両は、
充電用電力および制御用電力を給電するための車両側コネクタと、
前記車両側コネクタおよび前記車載バッテリ間の充電用ラインに配置され、前記制御用電力で動作するリレーと、
前記電動車両に搭載された補助バッテリで動作し、前記リレーの開閉を制御するリレー制御手段と、
前記リレーの閉固着を検出する検出手段と、
前記充電器と通信を行うための車両側通信手段と、を備え、
前記充電器は、
前記充電用電力および前記制御用電力を供電するための充電器側コネクタと、
前記充電用電力の出力電圧を計測する計測手段と、
前記車両側コネクタに装着された前記充電器側コネクタを介して、前記電動車両に、前記充電用電力および前記制御用電力を供電する電力供給手段と、
前記電動車両と通信を行うための充電器側通信手段と、を備え、
前記電力供給手段は、
前記車載バッテリの充電終了による前記充電用電力の供電停止後も、前記制御用電力の供電を継続し、
前記リレー制御手段は、
前記車載バッテリの充電開始に先立って前記リレーを閉成制御するとともに、前記車載バッテリの充電終了後に前記リレーを開放制御し、
前記計測手段は、
前記充電器側通信手段を介して前記電動車両に、前記充電用電力の出力電圧の計測値を送信し、
前記検出手段は、
前記車両側通信手段を介して前記電動車両から受信した前記車載バッテリの充電終了後における前記充電用電力の出力電圧の計測値に基づいて、前記リレーの閉固着を検出する。 For example, the present invention is a charging system comprising an electric vehicle and a charger that supplies electric power for charging to an in-vehicle battery of the electric vehicle,
The electric vehicle is
A vehicle-side connector for supplying charging power and control power;
A relay that is disposed on a charging line between the vehicle-side connector and the in-vehicle battery, and operates with the control power; and
Relay control means that operates with an auxiliary battery mounted on the electric vehicle and controls opening and closing of the relay;
Detecting means for detecting closed adhering of the relay;
Vehicle-side communication means for communicating with the charger,
The charger is
A charger-side connector for supplying the charging power and the control power;
Measuring means for measuring the output voltage of the charging power;
Power supply means for supplying the charging power and the control power to the electric vehicle via the charger-side connector attached to the vehicle-side connector;
Charger-side communication means for communicating with the electric vehicle,
The power supply means
Even after stopping charging of the charging power due to the end of charging of the in-vehicle battery, continuing to supply the control power,
The relay control means includes
Prior to starting charging of the in-vehicle battery, the relay is controlled to be closed, and after the charging of the in-vehicle battery is completed, the relay is controlled to be opened,
The measuring means includes
Transmitting the measured value of the output voltage of the charging power to the electric vehicle via the charger-side communication means,
The detection means includes
Based on the measured value of the output voltage of the charging power after completion of charging of the in-vehicle battery received from the electric vehicle via the vehicle-side communication means, the closed closure of the relay is detected.

このような充電システムにおいて、
前記充電器は、前記車載バッテリの充電開始に先立って前記充電器側コネクタと前記車両側コネクタとをロックし、操作者より受け付けた解除操作に応じて、当該ロックを解除するロック手段をさらに備えてもよい。ここで、前記検出手段は、前記車両側通信手段を介して前記充電器に、前記リレーの閉固着の検出結果を送信する。また、前記電力供給手段は、前記充電器側通信手段を介して前記電動車両から受信した検出結果が前記リレーの閉固着を示している場合に、前記解除操作の有無にかかわらず、前記ロック手段による前記ロックを持続させる。 In such a charging system,
The charger further includes locking means for locking the charger-side connector and the vehicle-side connector prior to the start of charging of the in-vehicle battery, and releasing the lock according to a release operation received from an operator. May be. Here, the detection means transmits a detection result of the closed closure of the relay to the charger via the vehicle-side communication means. The power supply means may be configured to lock the lock means regardless of whether or not the release operation is performed when a detection result received from the electric vehicle via the charger-side communication means indicates that the relay is closed. The lock according to is maintained.

また、このような充電システムにおいて、
前記リレーは、前記充電用ラインを構成する正極側および負極側ラインの一方に配置された第一のリレーと、前記正極側および負極側ラインの他方に配置された第二のリレーと、を備えて構成されてもよい。 In such a charging system,
The relay includes a first relay disposed on one of a positive electrode side and a negative electrode side line constituting the charging line, and a second relay disposed on the other of the positive electrode side and the negative electrode side line. May be configured.

この場合、前記リレー制御手段は、前記車載バッテリの充電開始に先立って前記第一および第二のリレーを閉成制御するとともに、前記車載バッテリの充電終了後、第一の監視時間を経過するまで、前記第一のリレーを開放制御して前記第二のリレーを閉成制御のままとし、次いで第二の監視時間を経過するまで、前記第一のリレーを閉成制御して前記第二のリレーを開放制御する。   In this case, the relay control means controls the closing of the first and second relays prior to the start of charging of the in-vehicle battery, and until the first monitoring time elapses after the end of charging of the in-vehicle battery. The first relay is controlled to open and the second relay is kept closed, and then the first relay is controlled to close until the second monitoring time elapses. Open control of the relay.

また、前記検出手段は、前記車載バッテリの充電終了後の前記第一の監視時間内に前記計測手段により計測された前記充電用電力の出力電圧に基づいて、前記第一のリレーの閉固着を検出するとともに、前記第一の監視時間経過後の前記第二の監視時間内に前記計測手段により計測された前記充電用電力の出力電圧に基づいて、前記第二のリレーの閉固着を検出する。   In addition, the detecting means may close the first relay based on the output voltage of the charging power measured by the measuring means within the first monitoring time after the end of charging of the in-vehicle battery. And detecting closed closure of the second relay based on the output voltage of the charging power measured by the measuring means within the second monitoring time after the first monitoring time has elapsed. .

なお、前記第一および第二の監視時間は、前記電力供給手段が前記充電用電力の供電停止後に、前記充電器側通信手段を介して前記電動車両に通知してもよい。   The first and second monitoring times may be notified to the electric vehicle via the charger-side communication unit after the power supply unit stops supplying the charging power.

本発明によれば、電動車両側に追加的なコストをかけることなくリレーの閉固着を検出でき、かつ充電中以外はリレーを確実に開放できる。   According to the present invention, it is possible to detect the closed adhesion of the relay without incurring additional costs on the electric vehicle side, and it is possible to reliably open the relay except during charging.

図１は、本発明の一実施の形態に係る電気自動車の充電システムの概略構成図である。FIG. 1 is a schematic configuration diagram of a charging system for an electric vehicle according to an embodiment of the present invention. 図２は、図１に示す電気自動車の充電システムの充電動作を説明するためのフロー図である。FIG. 2 is a flowchart for explaining the charging operation of the electric vehicle charging system shown in FIG. 図３（Ａ）は、図１に示す電気自動車２００の第一の変形例を示す図であり、図３（Ｂ）は、図１に示す電気自動車２００の第二の変形例を示す図である。3A is a diagram showing a first modification of electric vehicle 200 shown in FIG. 1, and FIG. 3B is a diagram showing a second modification of electric vehicle 200 shown in FIG. is there.

以下、添付図面を参照しながら、本発明の実施の形態について説明する。   Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

図１は、本発明の一実施の形態に係る電気自動車の充電システムの概略構成図である。   FIG. 1 is a schematic configuration diagram of a charging system for an electric vehicle according to an embodiment of the present invention.

図示するように、本実施の形態に係る充電システムは、充電器１００と、電気自動車２００と、を有する。   As illustrated, the charging system according to the present embodiment includes a charger 100 and an electric vehicle 200.

まず、電気自動車２００について説明する。電気自動車２００は、車両側コネクタ２０１と、車載バッテリ２０３と、補助バッテリ２０４と、リレー２０５Ａ，２０５Ｂと、リレー制御部２０６と、通信部２０７と、閉固着検出部２０８と、を有する。   First, the electric vehicle 200 will be described. The electric vehicle 200 includes a vehicle-side connector 201, an in-vehicle battery 203, an auxiliary battery 204, relays 205A and 205B, a relay control unit 206, a communication unit 207, and a closed adhesion detection unit 208.

車両側コネクタ２０１は、一対の充電用ライン（例えば４００Ｖ電源ライン）２０２Ａ，２０２Ｂ、一対の制御電力用ライン（例えば１２Ｖ電源ライン）２０２Ｃ，２０２Ｄ、および通信ライン２０２Ｅの端子を各々備える。後述の充電器側コネクタ１０１が車両側コネクタ２０１に装着されると、これらの端子がそれぞれ後述の充電器側コネクタ１０１の対応端子と当接する。これにより、一対の充電用ライン２０２Ａ，２０２Ｂ、一対の制御電力用ライン２０２Ｃ，２０２Ｄ、および通信ライン２０２Ｅが、それぞれ、充電器１００の一対の充電用ライン１０２Ａ，１０２Ｂ、一対の制御電力用ライン１０２Ｃ，１０２Ｄ、および通信ライン１０２Ｅと電気的に接続される。   The vehicle-side connector 201 includes terminals for a pair of charging lines (for example, 400V power line) 202A and 202B, a pair of control power lines (for example, 12V power line) 202C and 202D, and a communication line 202E. When a later-described charger-side connector 101 is attached to the vehicle-side connector 201, these terminals abut against corresponding terminals of the later-described charger-side connector 101, respectively. As a result, the pair of charging lines 202A and 202B, the pair of control power lines 202C and 202D, and the communication line 202E correspond to the pair of charging lines 102A and 102B and the pair of control power lines 102C of the charger 100, respectively. , 102D and the communication line 102E.

車載バッテリ２０３は、モータ、インバータ等の駆動系に駆動用電力を供電するためのバッテリである。   The in-vehicle battery 203 is a battery for supplying drive power to a drive system such as a motor or an inverter.

補助バッテリ２０４は、図示していないＥＣＵ等の制御系に制御用電力を供電するためのバッテリである。   The auxiliary battery 204 is a battery for supplying control power to a control system such as an ECU (not shown).

一方のリレー２０５Ａは、一対の制御電力用ライン２０２Ｃ，２０２Ｄを介して充電器１００から給電される制御用電力により動作する。このリレー２０５Ａは、正極側の充電用ライン２０２Ａに挿入されており、後述のリレー制御部２０６の制御により開閉することで、正極側の充電用ライン２０２Ａを切断または接続する。   One relay 205A operates with control power supplied from the charger 100 via a pair of control power lines 202C and 202D. The relay 205A is inserted into the positive-side charging line 202A, and is opened or closed under the control of a relay control unit 206 described later to disconnect or connect the positive-side charging line 202A.

他方のリレー２０５Ｂは、一対の制御電力用ライン２０２Ｃ，２０２Ｄを介して充電器１００から給電される制御用電力により動作する。このリレー２０５Ｂは、負極側の充電用ライン２０２Ｂに挿入されており、後述のリレー制御部２０６の制御により開閉することで、負極側の充電用ライン２０２Ｂを切断または接続する。   The other relay 205B operates with control power supplied from the charger 100 via a pair of control power lines 202C and 202D. The relay 205B is inserted into the negative charging line 202B, and is opened or closed under the control of a relay control unit 206 described later, thereby disconnecting or connecting the negative charging line 202B.

リレー制御部２０６は、補助バッテリ２０４から給電される制御用電力で動作し、リレー２０５Ａ，２０５Ｂのそれぞれを開閉制御する。このようなリレー制御部２０６は、例えばＥＣＵの機能の一部として実現される。   The relay control unit 206 operates with control power supplied from the auxiliary battery 204, and controls opening and closing of the relays 205A and 205B. Such a relay control unit 206 is realized as a part of the function of the ECU, for example.

通信部２０７は、通信ライン２０２Ｅを介して充電器１００と通信を行う。   The communication unit 207 communicates with the charger 100 via the communication line 202E.

閉固着検出部２０８は、通信部２０７を介して充電器１００から送られてくる充電用電力の出力電圧の計測値に基づいて、リレー２０５Ａ，２０５Ｂの閉固着を検出する。なお、閉固着検出部２０８は、例えばＥＣＵの機能の一部として実現されるものでもよい。   The closed sticking detection unit 208 detects the closed sticking of the relays 205A and 205B based on the measurement value of the output voltage of the charging power sent from the charger 100 via the communication unit 207. The closed sticking detection unit 208 may be realized as a part of the function of the ECU, for example.

つぎに、充電器１００について説明する。充電器１００は、充電器側コネクタ１０１と、充電ケーブル１０２と、交直変換部１０３と、ＥＬＢ（漏電遮断器）１０４と、ラッチ部１０５と、通信部１０６と、電圧計１０７と、主制御部１０８と、制御系電源１０９と、を有する。   Next, the charger 100 will be described. The charger 100 includes a charger-side connector 101, a charging cable 102, an AC / DC converter 103, an ELB (leakage breaker) 104, a latch unit 105, a communication unit 106, a voltmeter 107, and a main control unit. 108 and a control system power supply 109.

充電器側コネクタ１０１は、一対の充電用ライン１０２Ａ，１０２Ｂ、一対の制御電力用ライン１０２Ｃ，１０２Ｄ、および通信ライン１０２Ｅの端子を各々備える。充電器側コネクタ１０１が車両側コネクタ２０１に装着されると、前述したように、これらの端子がそれぞれ車両側コネクタ２０１の対応端子と当接する。これにより、一対の充電用ライン１０２Ａ，１０２Ｂ、一対の制御電力用ライン１０２Ｃ，１０２Ｄ、および通信ライン１０２Ｅが、それぞれ、電気自動車２００の一対の充電用ライン２０２Ａ，２０２Ｂ、一対の制御電力用ライン２０２Ｃ，２０２Ｄ、および通信ライン２０２Ｅと電気的に接続される。   The charger-side connector 101 includes a pair of charging lines 102A and 102B, a pair of control power lines 102C and 102D, and a communication line 102E. When the charger-side connector 101 is attached to the vehicle-side connector 201, as described above, these terminals come into contact with the corresponding terminals of the vehicle-side connector 201, respectively. As a result, the pair of charging lines 102A and 102B, the pair of control power lines 102C and 102D, and the communication line 102E correspond to the pair of charging lines 202A and 202B and the pair of control power lines 202C of the electric vehicle 200, respectively. , 202D and the communication line 202E.

充電ケーブル１０２は、一対の充電用ライン１０２Ａ，１０２Ｂ、一対の制御電力用ライン１０２Ｃ，１０２Ｄ、および通信ライン１０２Ｅを収容する。なお、充電ケーブル１０２の先端には、充電器側コネクタ１０１が取り付けられる。   The charging cable 102 accommodates a pair of charging lines 102A and 102B, a pair of control power lines 102C and 102D, and a communication line 102E. A charger-side connector 101 is attached to the tip of the charging cable 102.

交直変換部１０３は、ＥＬＢ１０４を介して交流電源３００から給電される交流電力を直流電力に変換する。   The AC / DC converter 103 converts AC power supplied from the AC power supply 300 via the ELB 104 into DC power.

ＥＬＢ１０４は、交流電源３００および交直変換部１０３間に配置され、主制御部１０８の制御により、交流電源３００から交直変換部１０３に給電される交流電力を遮断する。   The ELB 104 is disposed between the AC power supply 300 and the AC / DC conversion unit 103, and blocks AC power supplied from the AC power supply 300 to the AC / DC conversion unit 103 under the control of the main control unit 108.

ラッチ部１０５は、操作者の所定の操作（以下、ロック操作と呼ぶ）により車両側コネクタ２０１に装着された充電器側コネクタ１０１を車両側コネクタ２０１にロック（固定）する。また、ラッチ部１０５は、操作者の所定の操作（以下、リリース操作と呼ぶ）により、車両側コネクタ２０１への充電器側コネクタ１０１の装着ロックをリリース（解除）する。また、ラッチ部１０５は、主制御部１０８からの指示に従い、操作者からのリリース操作の受付の有効・無効を設定する。   The latch unit 105 locks (fixes) the charger-side connector 101 attached to the vehicle-side connector 201 to the vehicle-side connector 201 by a predetermined operation of the operator (hereinafter referred to as a lock operation). In addition, the latch unit 105 releases (releases) the lock for attaching the charger-side connector 101 to the vehicle-side connector 201 by a predetermined operation of the operator (hereinafter referred to as a release operation). Further, the latch unit 105 sets validity / invalidity of accepting the release operation from the operator according to the instruction from the main control unit 108.

通信部１０６は、通信ライン１０２Ｅを介して電気自動車２００と通信を行う。   The communication unit 106 communicates with the electric vehicle 200 via the communication line 102E.

電圧計１０７は、充電用電力の出力電圧、すなわち一対の充電用ライン１０２Ａ，１０２Ｂ間の電圧を計測する。   The voltmeter 107 measures the output voltage of the charging power, that is, the voltage between the pair of charging lines 102A and 102B.

主制御部１０８は、充電器１００の各部を統括制御する。   The main control unit 108 performs overall control of each unit of the charger 100.

制御系電源１０９は、通信部１０６、主制御部１０８等の制御系に制御用電力を供電するための電源である。この制御系電源１０９は、バッテリでもよいし、あるいは交流電源３００から給電される交流を整流することで生成された電源であってもよい。また、この制御系電源１０９は、一対の制御電力用ライン１０２Ｃ，１０２Ｄを介して、充電器側コネクタ１０１から電気自動車２００のリレー２０５Ａ，２０５Ｂ等に、制御用電力を供電する。   The control system power supply 109 is a power supply for supplying control power to control systems such as the communication unit 106 and the main control unit 108. The control system power source 109 may be a battery or a power source generated by rectifying the AC fed from the AC power source 300. The control system power supply 109 supplies control power from the charger-side connector 101 to the relays 205A and 205B of the electric vehicle 200 via the pair of control power lines 102C and 102D.

次に、本実施の形態に係る電気自動車の充電システムの充電動作を説明する。   Next, a charging operation of the electric vehicle charging system according to the present embodiment will be described.

図２は、図１に示す電気自動車の充電システムの充電動作を説明するためのフロー図である。このフローは、ラッチ部１０５により充電器側コネクタ１０１と車両側コネクタ２０１とがロックされた状態において、充電器１００が、図示していない操作パネル等を介して操作者より充電開始の指示を受け付けることにより開始される。   FIG. 2 is a flowchart for explaining the charging operation of the electric vehicle charging system shown in FIG. In this flow, in a state where the charger-side connector 101 and the vehicle-side connector 201 are locked by the latch unit 105, the charger 100 receives an instruction to start charging from an operator via an operation panel (not shown). Is started.

まず、充電器１００において、主制御部１０８は、ラッチ部１０５にリリース操作の受付無効を指示する。これを受けて、ラッチ部１０５は、操作者からのリリース操作の有無にかかわらず、充電器側コネクタ１０１と車両側コネクタ２０１との装着ロックを維持する（Ｓ１０１）。それから、主制御部１０８は、通信部１０６および充電器側コネクタ１０１を介して電気自動車２００に充電開始通知を送信する（Ｓ１０２）。   First, in the charger 100, the main control unit 108 instructs the latch unit 105 to disable the release operation. In response to this, the latch unit 105 maintains the mounting lock between the charger-side connector 101 and the vehicle-side connector 201 regardless of the presence or absence of a release operation from the operator (S101). Then, the main control unit 108 transmits a charge start notification to the electric vehicle 200 via the communication unit 106 and the charger-side connector 101 (S102).

つぎに、電気自動車２００において、リレー制御部２０６は、車両側コネクタ２０１および通信部２０７を介して充電器１００から充電開始通知を受信すると（Ｓ２０１）、車両側コネクタ２０１を介して充電器１００から給電される制御用電力で動作する一対のリレー２０５Ａ，２０５Ｂを閉成制御する（Ｓ２０２）。これにより、一対の充電用ライン２０２Ａ，２０２Ｂが、充電器１００の一対の充電用ライン１０２Ａ，１０２Ｂと接続し、車載バッテリ２０３の充電準備が完了する。   Next, in the electric vehicle 200, when the relay control unit 206 receives a charge start notification from the charger 100 via the vehicle-side connector 201 and the communication unit 207 (S201), the relay control unit 206 receives the charge start notification from the charger 100 via the vehicle-side connector 201. The pair of relays 205A and 205B that operate with the supplied control power is controlled to close (S202). Thus, the pair of charging lines 202A and 202B are connected to the pair of charging lines 102A and 102B of the charger 100, and the preparation for charging the in-vehicle battery 203 is completed.

それから、リレー制御部２０６は、通信部２０７および車両側コネクタ２０１を介して充電器１００に、準備完了通知を送信する（Ｓ２０３）。   Then, the relay control unit 206 transmits a preparation completion notification to the charger 100 via the communication unit 207 and the vehicle-side connector 201 (S203).

つぎに、充電器１００において、主制御部１０８は、充電器側コネクタ１０１および通信部１０６を介して電気自動車２００から準備完了通知を受信すると（Ｓ１０３）、ＥＬＢ１０４を制御して交直変換部１０３を交流電源３００に接続する。これにより、交直変換部１０３から一対の充電用ライン１０２Ａ，１０２Ｂに充電用電力が出力され、車載バッテリ２０３の充電が開始される（Ｓ１０４）。   Next, in the charger 100, when the main control unit 108 receives a preparation completion notification from the electric vehicle 200 via the charger-side connector 101 and the communication unit 106 (S103), the main control unit 108 controls the ELB 104 to switch the AC / DC conversion unit 103. Connect to AC power supply 300. As a result, charging power is output from the AC / DC converter 103 to the pair of charging lines 102A and 102B, and charging of the in-vehicle battery 203 is started (S104).

その後、主制御部１０８は、電圧計１０７の計測値等に基づいて所定の充電終了条件を満足したか否かを判断する（Ｓ１０５）。そして、充電終了条件を満足したならば（Ｓ１０５でＹＥＳ）、ＥＬＢ１０４を制御して交直変換部１０３を交流電源３００から切断する。これにより、交直変換部１０３から一対の充電用ライン１０２Ａ，１０２Ｂへの充電用電力の出力が停止され、車載バッテリ２０３の充電が終了する（Ｓ１０６）。   Thereafter, the main control unit 108 determines whether or not a predetermined charging end condition is satisfied based on the measured value of the voltmeter 107 or the like (S105). If the charging end condition is satisfied (YES in S105), the ELB 104 is controlled to disconnect the AC / DC converter 103 from the AC power supply 300. As a result, the output of the charging power from the AC / DC converter 103 to the pair of charging lines 102A and 102B is stopped, and the charging of the in-vehicle battery 203 ends (S106).

それから、主制御部１０８は、通信部１０６および充電器側コネクタ１０１を介して、電気自動車２００に、電圧計１０７によって逐次計測される充電用電力の出力電圧の通知を開始する（Ｓ１０７）。また、主制御部１０８は、通信部１０６および充電器側コネクタ１０１を介して、電気自動車２００に、一方のリレー２０５Ａの閉固着検出のための第一の監視時間および他方のリレー２０５Ｂの閉固着検出のための第二の監視時間の指定を伴う充電終了通知を送信する（Ｓ１０８）。   Then, the main control unit 108 starts notifying the output voltage of the charging power that is sequentially measured by the voltmeter 107 to the electric vehicle 200 via the communication unit 106 and the charger-side connector 101 (S107). In addition, the main control unit 108 is connected to the electric vehicle 200 via the communication unit 106 and the charger-side connector 101 for the first monitoring time for detecting the closed fixation of one relay 205A and the closed fixation of the other relay 205B. A charge end notification with designation of the second monitoring time for detection is transmitted (S108).

なお、電圧計１０７の計測値の電気自動車２００への通知開始（Ｓ１０７）は、車載バッテリ２０３の充電開始後（Ｓ１０４）、直ちに実施してもよい。   The start of notification of the measured value of the voltmeter 107 to the electric vehicle 200 (S107) may be performed immediately after the start of charging the in-vehicle battery 203 (S104).

つぎに、電気自動車２００において、通信部２０７は、車両側コネクタ２０１を介して充電器１００から充電終了通知を受信すると（Ｓ２０４）、この充電終了通知をリレー制御部２０６および閉固着検出部２０８に渡す。   Next, in the electric vehicle 200, when the communication unit 207 receives a charging end notification from the charger 100 via the vehicle-side connector 201 (S 204), the charging end notification is sent to the relay control unit 206 and the closed sticking detection unit 208. hand over.

これを受けて、リレー制御部２０６は、一方のリレー２０５Ａを開放制御し、他方のリレー２０５Ｂを閉成のままとする（Ｓ２０５）。このとき、リレー２０５Ａが閉固着していなければ、正極側の充電用ライン２０２Ａのみが切断され、充電器１００の一対の充電用ライン１０２Ａ，１０２Ｂ間の電圧が低くなる。   In response to this, the relay control unit 206 controls to open one of the relays 205A and keeps the other relay 205B closed (S205). At this time, if the relay 205A is not closed and fixed, only the positive charging line 202A is disconnected, and the voltage between the pair of charging lines 102A and 102B of the charger 100 is lowered.

一方、閉固着検出部２０８は、充電終了通知で指定された第一の監視時間が経過するまでの間（Ｓ２０７でＮＯ）、車両側コネクタ２０１および通信部２０７を介して充電器１００から受信する電圧計１０７の計測値を監視して、一方のリレー２０５Ａが閉固着しているか否かを判断する（Ｓ２０６）。具体的には、第一の監視時間内に、電圧計１０７の計測値が所定量（例えば充電終了直前の計測値の半分に相当する量）以上低下した場合は、一方のリレー２０５Ａが閉固着していないと判断する。これに対して、電圧計１０７の計測値の低下量が所定量未満の場合は、一方のリレー２０５Ａが閉固着していると判断する。   On the other hand, the closed sticking detection unit 208 receives from the charger 100 via the vehicle-side connector 201 and the communication unit 207 until the first monitoring time designated by the charging end notification has elapsed (NO in S207). The measurement value of the voltmeter 107 is monitored to determine whether one of the relays 205A is closed and fixed (S206). Specifically, if the measured value of the voltmeter 107 decreases by a predetermined amount (for example, an amount corresponding to half of the measured value immediately before the end of charging) within the first monitoring time, one relay 205A is closed and fixed. Judge that it is not. On the other hand, when the amount of decrease in the measured value of the voltmeter 107 is less than the predetermined amount, it is determined that one of the relays 205A is closed and fixed.

つぎに、リレー制御部２０６は、充電終了通知で指定された第一の監視時間の経過後（Ｓ２０７でＹＥＳ）、一方のリレー２０５Ａを閉成制御し、他方のリレー２０５Ｂを開放制御する（Ｓ２０８）。このとき、リレー２０５Ｂが閉固着していなければ、負極側の充電用ライン２０２Ｂのみが切断され、充電器１００の一対の充電用ライン１０２Ａ，１０２Ｂ間の電圧が低くなる。   Next, after the elapse of the first monitoring time designated by the charging end notification (YES in S207), the relay control unit 206 controls closing of one relay 205A and controlling opening of the other relay 205B (S208). ). At this time, if the relay 205B is not closed and fixed, only the charging line 202B on the negative electrode side is disconnected, and the voltage between the pair of charging lines 102A and 102B of the charger 100 becomes low.

一方、閉固着検出部２０８は、充電終了通知で指定された第二の監視時間が経過するまでの間（Ｓ２１０でＮＯ）、車両側コネクタ２０１および通信部２０７を介して充電器１００から受信する電圧計１０７の計測値を監視して、他方のリレー２０５Ｂが閉固着しているか否かを判断する（Ｓ２０９）。具体的には、第二の監視時間内に、電圧計１０７の計測値が所定量（例えば充電終了直前の計測値の半分に相当する量）以上低下した場合は、他方のリレー２０５Ｂが閉固着していないと判断する。これに対して、電圧計１０７の計測値の低下量が所定値未満の場合は、他方のリレー２０５Ｂが閉固着していると判断する。   On the other hand, the closed sticking detection unit 208 receives from the charger 100 via the vehicle-side connector 201 and the communication unit 207 until the second monitoring time designated by the charging end notification has elapsed (NO in S210). The measured value of the voltmeter 107 is monitored to determine whether or not the other relay 205B is closed and fixed (S209). Specifically, if the measured value of the voltmeter 107 decreases by a predetermined amount (for example, an amount corresponding to half of the measured value immediately before the end of charging) within the second monitoring time, the other relay 205B is closed and fixed. Judge that it is not. On the other hand, if the amount of decrease in the measured value of the voltmeter 107 is less than the predetermined value, it is determined that the other relay 205B is closed and fixed.

つぎに、リレー制御部２０６は、充電終了通知で指定された第二の監視時間の経過後（Ｓ２１０でＹＥＳ）、リレー２０５Ａ，リレー２０５Ｂの両方を開放制御する（Ｓ２１１）。また、閉固着制御部２０８は、通信部２０７および車両側コネクタ２０１を介して充電器１００に、リレー２０５Ａ，２０５Ｂの閉固着の判断結果を送信する（Ｓ２１２）。   Next, after the elapse of the second monitoring time designated by the charge end notification (YES in S210), the relay control unit 206 controls to open both the relay 205A and the relay 205B (S211). Further, the closed adhesion control unit 208 transmits the determination result of the closed adhesion of the relays 205A and 205B to the charger 100 via the communication unit 207 and the vehicle-side connector 201 (S212).

ここで、閉固着の判断結果を、電気自動車２００の図示していない表示部に表示してもよい。また、閉固着の判断結果が、リレー２０５Ａ，２０５Ｂの双方が閉固着していることを示しているならば、ＥＣＵが、操作者によるイグニッション操作の有無にかかわらず、イグニッションをオフにするように制御してもよい。   Here, the determination result of the closed adhering may be displayed on a display unit (not shown) of the electric vehicle 200. Further, if the determination result of the closed adhering indicates that both of the relays 205A and 205B are closed adhering, the ECU turns off the ignition regardless of whether or not the operator performs an ignition operation. You may control.

つぎに、充電器１００において、主制御部１０８は、充電器側コネクタ１０１および通信部１０６を介して電気自動車２００から、リレー２０５Ａ，２０５Ｂの閉固着の判断結果を受信すると（Ｓ１０９）、この判断結果が、リレー２０５Ａ，２０５Ｂの両方がともに閉固着していることを示している否かを判断する（Ｓ１１０）。この際、充電器１００の図示していない表示部に、この判断結果を表示してもよい。   Next, in the charger 100, when the main control unit 108 receives the determination result of the closed closure of the relays 205A and 205B from the electric vehicle 200 via the charger-side connector 101 and the communication unit 106 (S109), this determination is made. It is determined whether or not the result indicates that both of the relays 205A and 205B are closed and fixed (S110). At this time, the determination result may be displayed on a display unit (not shown) of the charger 100.

この判断結果が、リレー２０５Ａ，２０５Ｂの少なくとも一方が閉固着していないことを示している場合（Ｓ１１０でＮＯ）、主制御部１０８は、ラッチ部１０５にリリース操作の受付有効を指示する。これを受けて、ラッチ部１０５は、操作者からのリリース操作の受付を有効にする（Ｓ１１１）。   When the determination result indicates that at least one of the relays 205A and 205B is not closed and fixed (NO in S110), the main control unit 108 instructs the latch unit 105 to accept the release operation. In response to this, the latch unit 105 validates the acceptance of the release operation from the operator (S111).

その結果、操作者は、リリース操作を行って、充電器側コネクタ１０１と車両側コネクタ２０１との装着ロックを解除し、充電器側コネクタ１０１を車両側コネクタ２０１から引き抜くことが可能となる。そして、充電器側コネクタ１０１が車両側コネクタ２０１から引き抜かれると、充電器１００からリレー２０５Ａ，２０５Ｂへの制御用電力の供電が停止する。このため、たとえリレー制御部２０６が誤作動してリレー２０５Ａ，２０５Ｂを閉成制御した場合でも、制御用電力が供電されないリレー２０５Ａ，２０５Ｂの少なくとも一方は開放したままとなる。   As a result, the operator can perform a release operation to release the mounting lock between the charger-side connector 101 and the vehicle-side connector 201 and pull out the charger-side connector 101 from the vehicle-side connector 201. When the charger-side connector 101 is pulled out from the vehicle-side connector 201, the supply of control power from the charger 100 to the relays 205A and 205B is stopped. For this reason, even if the relay control unit 206 malfunctions and closes the relays 205A and 205B, at least one of the relays 205A and 205B to which control power is not supplied remains open.

一方、この判断結果が、リレー２０５Ａ，２０５Ｂの両方がともに閉固着していることを示している場合（Ｓ１１０でＹＥＳ）、主制御部１０８は、ラッチ部１０５にリリース操作の受付有効を指示することなく、このフローを終了する。   On the other hand, when this determination result indicates that both relays 205A and 205B are closed and fixed (YES in S110), main control unit 108 instructs latch unit 105 to accept the release operation. Without ending this flow.

その結果、ラッチ部１０５は、リリース操作の受付が無効のままとなり、操作者からのリリース操作に有無にかかわらず、充電器側コネクタ１０１と車両側コネクタ２０１との装着ロックが維持される。   As a result, the latch unit 105 remains disabled from accepting the release operation, and the attachment lock between the charger-side connector 101 and the vehicle-side connector 201 is maintained regardless of whether the release operation is performed by the operator.

以上、本発明の一実施の形態を説明した。   The embodiment of the present invention has been described above.

本実施の形態では、充電器１００は、車載バッテリ２０３の充電開始に先立って、車両側コネクタ２０１に装着された充電器側コネクタ１０１を介して制御用電力の供電を開始し、それから、充電器側コネクタ１０１を介して充電用電力を供電して車載バッテリ２０３を充電する。そして、車載バッテリ２０３の充電終了による充電用電力の供電停止後も、所定の監視時間、電気自動車２００への制御用電力の供電を継続する。   In the present embodiment, the charger 100 starts supplying control power via the charger-side connector 101 attached to the vehicle-side connector 201 prior to the start of charging of the in-vehicle battery 203, and then the charger The in-vehicle battery 203 is charged by supplying charging power via the side connector 101. Then, even after stopping the supply of the charging power due to the end of charging of the in-vehicle battery 203, the control power is continuously supplied to the electric vehicle 200 for a predetermined monitoring time.

一方、電気自動車２００では、車両側コネクタ２０１および車載バッテリ２０３間の充電用ライン２０２Ａ，２０２Ｂに配置されたリレー２０５Ａ，２０５Ｂを、車両側コネクタ２０１を介して充電器１００から給電される制御用電力により動作させる。また、電気自動車２００は、車載バッテリ２０３の充電開始に先立ってリレー２０５Ａ，２０５Ｂを閉成制御し、車両側コネクタ２０１を介して充電器１００から給電される充電用電力により車載バッテリ２０３が充電されるのを待つ。そして、車載バッテリ２０３の充電終了後、所定の監視時間内に、リレー２０５Ａ，２０５Ｂを交互に開放制御する。この間、充電器１００は、電気自動車２００への制御用電力の供電を継続しつつ、充電用電力の出力電圧を計測し、この計測値を電気自動車２００に通知する。電気自動車２００は、充電器１００から通知された充電用電力の出力電圧の計測値に基づいてリレー２０５Ａ，２０５Ｂの閉固着を検出する。   On the other hand, in the electric vehicle 200, the control power supplied from the charger 100 via the vehicle-side connector 201 to the relays 205 </ b> A and 205 </ b> B disposed on the charging lines 202 </ b> A and 202 </ b> B between the vehicle-side connector 201 and the vehicle-mounted battery 203. To make it work. Further, the electric vehicle 200 controls closing of the relays 205A and 205B prior to the start of charging of the in-vehicle battery 203, and the in-vehicle battery 203 is charged by the charging power supplied from the charger 100 via the vehicle-side connector 201. Wait for it. Then, after charging of the in-vehicle battery 203, the relays 205A and 205B are alternately controlled to open within a predetermined monitoring time. During this time, the charger 100 measures the output voltage of the charging power while continuing to supply the control power to the electric vehicle 200 and notifies the electric vehicle 200 of the measured value. The electric vehicle 200 detects the closed adherence of the relays 205A and 205B based on the measured value of the output voltage of the charging power notified from the charger 100.

したがって、本実施の形態によれば、車両側コネクタ２０１およびリレー２０５Ａ，２０５Ｂ間の充電用ライン２０２Ａ，２０２Ｂの電圧を計測する電圧計を電気自動車２００に追加することなく、充電システムの構成を利用して、電気自動車２００のリレー２０５Ａ，２０５Ｂの閉固着を検出できる。また、充電器側コネクタ１０１が車両側コネクタ２０１に装着されていない場合、すなわち充電中以外は、たとえリレー制御部２０６が誤作動してリレー２０５Ａ，２０５Ｂを閉成制御した場合でも、リレー２０５Ａ，２０５Ｂの少なくとも一方を確実に開放しておくことができる。   Therefore, according to the present embodiment, the configuration of the charging system is used without adding to the electric vehicle 200 a voltmeter that measures the voltage of the charging lines 202A and 202B between the vehicle-side connector 201 and the relays 205A and 205B. Thus, it is possible to detect the closed adhesion of the relays 205A and 205B of the electric vehicle 200. Further, when the charger-side connector 101 is not attached to the vehicle-side connector 201, that is, when charging is not being performed, even if the relay control unit 206 malfunctions and controls the relays 205A and 205B to close, At least one of 205B can be reliably opened.

また、本実施の形態において、充電器１００は、充電中、車両側コネクタ２０１に装着された充電器側コネクタ１０１を車両側コネクタ２０１にロックする。そして、電気自動車２００のリレー２０５Ａ，２０５Ｂ両方の閉固着が検出されたならば、充電終了後も、操作者のリリース操作にかかわらず装着ロックを維持する。   In the present embodiment, charger 100 locks charger-side connector 101 attached to vehicle-side connector 201 to vehicle-side connector 201 during charging. If closed adhesion of both relays 205A and 205B of electric vehicle 200 is detected, the mounting lock is maintained regardless of the operator's release operation even after the end of charging.

したがって、本実施の形態によれば、車両側コネクタ２０１に車載バッテリ２０３の電圧が印加されたまま、この車両側コネクタ２０１から充電器側コネクタ１０１が引き抜かれる事態が発生するのを防止できる。   Therefore, according to the present embodiment, it is possible to prevent a situation where the charger-side connector 101 is pulled out from the vehicle-side connector 201 while the voltage of the in-vehicle battery 203 is applied to the vehicle-side connector 201.

また、本実施の形態では、電気自動車２００において、充電用電力を車載バッテリ２０３に供電する正極側および負極側の充電用ライン２０２Ａ，２０２Ｂのそれぞれにリレー２０５Ａ，２０５Ｂを配置している。そして、電気自動車２００は、車載バッテリ２０３の充電終了後、第一の監視時間を経過するまで、一方のリレー２０５Ａを開放制御して他方のリレー２０５Ｂを閉成のままとし、その間に充電器１００から逐次通知される電圧計１０７の計測値を監視して、一方のリレー２０５Ａの閉固着を判断する。ついで第一の監視時間の経過後、第二の監視時間を経過するまで、一方のリレー２０５Ａを閉成制御して他方のリレー２０５Ｂを開放制御し、その間に充電器１００から逐次通知される電圧計１０７の計測値を監視して、他方のリレー２０５Ｂの閉固着を判断する。   In this embodiment, in electric vehicle 200, relays 205A and 205B are arranged on positive and negative charging lines 202A and 202B that supply charging power to in-vehicle battery 203, respectively. Then, after the charging of the in-vehicle battery 203 is completed, the electric vehicle 200 controls to open one of the relays 205A and keep the other relay 205B closed until the first monitoring time elapses. The measured value of the voltmeter 107 sequentially notified from is monitored to determine whether one of the relays 205A is closed. Then, after the first monitoring time elapses, until the second monitoring time elapses, one relay 205A is controlled to close and the other relay 205B is controlled to open, during which the voltage sequentially notified from the charger 100 The measured value of the total 107 is monitored to determine whether the other relay 205B is closed.

このように、本実施の形態によれば、リレー２０５Ａ，２０５Ｂそれぞれの閉固着を個別に検出することができる。   As described above, according to the present embodiment, it is possible to individually detect the closed adhesion of the relays 205A and 205B.

また、本実施の形態において、充電器１００は、車載バッテリ２０３の充電終了後、電気自動車２００に、第一、第二の監視時間の指定を伴う充電終了通知を送信する。したがって、本実施の形態によれば、リレー２０５Ａ，２０５Ｂそれぞれの閉固着の判断をより確実に行うことが可能となる。   Further, in the present embodiment, charger 100 transmits a charging end notification with designation of first and second monitoring times to electric vehicle 200 after charging of in-vehicle battery 203 ends. Therefore, according to the present embodiment, it is possible to more reliably determine whether the relays 205A and 205B are closed and stuck.

なお、上記実施の形態では、まず、一方のリレー２０５Ａを開放制御して他方のリレー２０５Ｂを閉成のままとし、ついで、一方のリレー２０５Ａを閉成制御して他方のリレー２０５Ｂを開放制御することにより、リレー２０５Ａ，２０５Ｂの順番で閉固着を判断している。しかし、本発明はこれに限定されない。まず、一方のリレー２０５Ａを閉成のままとして他方のリレー２０５Ｂを開放制御し、ついで、一方のリレー２０５Ａを開放制御して他方のリレー２０５Ｂを閉成制御することにより、リレー２０５Ｂ，２０５Ａの順番で閉固着を判断してもよい。   In the above embodiment, first, one of the relays 205A is controlled to be open and the other relay 205B is kept closed, and then one of the relays 205A is controlled to close and the other relay 205B is controlled to open. As a result, it is determined that the relays 205A and 205B are closed and stuck. However, the present invention is not limited to this. First, one relay 205A is kept closed and the other relay 205B is controlled to open, and then one relay 205A is controlled to open and the other relay 205B is controlled to close. The closed sticking may be determined.

また、上記実施の形態では、充電用電力を車載バッテリ２０３に供電する正極側および負極側の充電用ライン２０２Ａ，２０２Ｂのそれぞれに個別に動作するリレー２０５Ａ，２０５Ｂを配置した場合を例にとり説明した。しかし、本発明はこれに限定されない。例えば図３（Ａ）に示すように、正極側の充電用ライン２０２Ａにのみリレー２０５Ａを配置してもよいし、あるいは、負極側の充電用ライン２０２Ｂにのみリレー２０５Ｂを配置してもよい。また、図３（Ｂ）に示すように、正極側および負極側の充電用ライン２０２Ａ，２０２Ｂの両方を同時に切断および接続できるように開閉動作するリレー２０５Ｃを配置してもよい。これらの場合、電気自動車２００において、リレー制御部２０６は、車載バッテリ２０３の充電終了後、充電器１００からの制御用電力の給電が継続する所定の監視時間、リレー２０５Ｃを開放制御する。また、閉固着検出部２０８は、この所定の監視時間を経過するまでの間に充電器１００から逐次通知される電圧計１０７の計測値を監視して、リレー２０５Ｃの閉固着を判断する。   Further, in the above-described embodiment, the case where the relays 205A and 205B that individually operate are arranged in the positive and negative charging lines 202A and 202B that supply charging power to the in-vehicle battery 203 has been described as an example. . However, the present invention is not limited to this. For example, as shown in FIG. 3A, the relay 205A may be arranged only on the positive charging line 202A, or the relay 205B may be arranged only on the negative charging line 202B. In addition, as shown in FIG. 3B, a relay 205C that opens and closes may be disposed so that both the positive and negative charging lines 202A and 202B can be disconnected and connected simultaneously. In these cases, in the electric vehicle 200, the relay control unit 206 controls to open the relay 205 </ b> C for a predetermined monitoring time during which the control power from the charger 100 continues to be supplied after the in-vehicle battery 203 is charged. Further, the closed sticking detection unit 208 monitors the measurement value of the voltmeter 107 sequentially notified from the charger 100 until the predetermined monitoring time elapses, and determines the closed sticking of the relay 205C.

一方、充電器１００において、主制御部１０８は、車載バッテリ２０３の充電終了後、所定の監視時間を経過するまでの間、電気自動車２００への制御用電力の給電を継続し、通信部１０６および充電器側コネクタ１０１を介して電気自動車２００に、電圧計１０７で逐次計測される充電用電力の出力電圧の測定値を通知する。   On the other hand, in charger 100, main control unit 108 continues to supply power for control to electric vehicle 200 until a predetermined monitoring time elapses after charging of in-vehicle battery 203, and communication unit 106 and The measured value of the output voltage of the charging power that is sequentially measured by the voltmeter 107 is notified to the electric vehicle 200 via the charger-side connector 101.

また、上記実施の形態では、リレー２０５Ａ，２０５Ｂの閉固着の判断を、電気自動車２００側で行っているが、本発明はこれに限定されない。リレー２０５Ａ，２０５Ｂの閉固着の判断を、充電器１００側で行い、その判断結果を充電器１００から電気自動車２００に通知するようにしてもよい。   Moreover, in the said embodiment, although determination of the closed adhering of relay 205A, 205B is performed by the electric vehicle 200 side, this invention is not limited to this. The determination of whether the relays 205 </ b> A and 205 </ b> B are firmly closed may be performed on the charger 100 side, and the determination result may be notified from the charger 100 to the electric vehicle 200.

また、本発明は、電気自動車２００のみならず、搭載されたバッテリの外部電源からの充電機能を有する電動車両に広く適用できる。   In addition, the present invention can be widely applied not only to the electric vehicle 200 but also to an electric vehicle having a charging function from an external power source of a mounted battery.

１００：充電器、１０１：充電器側コネクタ、１０２：充電ケーブル、１０２Ａ,１０２Ｂ：充電用ライン、１０２Ｃ，１０２Ｄ：制御電力用ライン、１０２Ｅ：通信ライン、１０３：交直変換部、１０４：ＥＬＢ、１０５：ラッチ部、１０６：通信部、１０７：電圧計、１０８：主制御部、１０９：制御系電源、２００：電気自動車、２０１：車両側コネクタ、２０２Ａ，２０２Ｂ：充電用ライン、２０２Ｃ，２０２Ｄ：制御電力用ライン、２０２Ｅ：通信ライン、２０３：車載バッテリ、２０４：補助バッテリ、２０５Ａ〜２０５Ｃ：リレー、２０６：リレー制御部、２０７：通信部、２０８：閉固着検出部、３００：交流電源 DESCRIPTION OF SYMBOLS 100: Charger, 101: Charger side connector, 102: Charging cable, 102A, 102B: Charging line, 102C, 102D: Control power line, 102E: Communication line, 103: AC / DC converter, 104: ELB, 105 : Latch unit, 106: communication unit, 107: voltmeter, 108: main control unit, 109: control system power supply, 200: electric vehicle, 201: vehicle side connector, 202A, 202B: charging line, 202C, 202D: control Power line, 202E: communication line, 203: vehicle battery, 204: auxiliary battery, 205A to 205C: relay, 206: relay control unit, 207: communication unit, 208: closed adhesion detection unit, 300: AC power supply

Claims (7)

電動車両と、前記電動車両の車載バッテリに充電用電力を供電する充電器と、を有する充電システムであって、
前記電動車両は、
充電用電力および制御用電力を給電するための車両側コネクタと、
前記車両側コネクタおよび前記車載バッテリ間の充電用ラインに配置され、前記制御用電力で動作するリレーと、
前記電動車両に搭載された補助バッテリで動作し、前記リレーの開閉を制御するリレー制御手段と、
前記リレーの閉固着を検出する検出手段と、
前記充電器と通信を行うための車両側通信手段と、を備え、
前記充電器は、
前記充電用電力および前記制御用電力を供電するための充電器側コネクタと、
前記充電用電力の出力電圧を計測する計測手段と、
前記車両側コネクタに装着された前記充電器側コネクタを介して、前記電動車両に前記充電用電力および前記制御用電力を供電する電力供給手段と、を備え、
前記電力供給手段は、
前記車載バッテリの充電終了による前記充電用電力の供電停止後も、前記制御用電力の供電を継続し、
前記リレー制御手段は、
前記車載バッテリの充電開始に先立って前記リレーを閉成制御するとともに、前記車載バッテリの充電終了後に前記リレーを開放制御し、
前記計測手段は、
前記充電器側通信手段を介して前記電動車両に、前記充電用電力の出力電圧の計測値を送信し、
前記検出手段は、
前記車両側通信手段を介して前記充電器から受信した前記車載バッテリの充電終了後における前記充電用電力の出力電圧の計測値に基づいて、前記リレーの閉固着を検出する
ことを特徴とする充電システム。 A charging system comprising: an electric vehicle; and a charger that supplies electric power for charging to an in-vehicle battery of the electric vehicle,
The electric vehicle is
A vehicle-side connector for supplying charging power and control power;
A relay that is disposed on a charging line between the vehicle-side connector and the in-vehicle battery, and operates with the control power; and
Relay control means that operates with an auxiliary battery mounted on the electric vehicle and controls opening and closing of the relay;
Detecting means for detecting closed adhering of the relay;
Vehicle-side communication means for communicating with the charger,
The charger is
A charger-side connector for supplying the charging power and the control power;
Measuring means for measuring the output voltage of the charging power;
Power supply means for supplying the electric power for charging and the electric power for control to the electric vehicle via the charger-side connector attached to the vehicle-side connector,
The power supply means
Even after stopping charging of the charging power due to the end of charging of the in-vehicle battery, continuing to supply the control power,
The relay control means includes
Prior to starting charging of the in-vehicle battery, the relay is controlled to be closed, and after the charging of the in-vehicle battery is completed, the relay is controlled to be opened,
The measuring means includes
Transmitting the measured value of the output voltage of the charging power to the electric vehicle via the charger-side communication means,
The detection means includes
Charging characterized in that the relay is detected to be closed based on the measured value of the output voltage of the charging power after completion of charging of the in-vehicle battery received from the charger via the vehicle-side communication means. system. 請求項１に記載の充電システムであって、
前記充電器は、
前記車載バッテリの充電開始に先立って前記充電器側コネクタと前記車両側コネクタとをロックし、操作者より受け付けた解除操作に応じて、当該ロックを解除するロック手段をさらに備え、
前記検出手段は、
前記車両側通信手段を介して前記充電器に、前記リレーの閉固着の検出結果を送信し、
前記電力供給手段は、
前記充電器側通信手段を介して前記電動車両から受信した検出結果が前記リレーの閉固着を示している場合に、前記解除操作の有無にかかわらず、前記ロック手段による前記ロックを持続させる
ことを特徴とする充電システム。 The charging system according to claim 1,
The charger is
Prior to the start of charging of the in-vehicle battery, the charger-side connector and the vehicle-side connector are locked, and according to a release operation received from an operator, further includes a lock unit that releases the lock,
The detection means includes
Sending the detection result of the closed closure of the relay to the charger via the vehicle side communication means,
The power supply means
When the detection result received from the electric vehicle via the charger-side communication means indicates that the relay is closed and fixed, the lock by the lock means is maintained regardless of whether or not the release operation is performed. Characteristic charging system. 請求項１または２に記載の充電システムであって、
前記リレーは、
前記充電用ラインを構成する正極側および負極側ラインの一方に配置された第一のリレー、および前記正極側および負極側ラインの他方に配置された第二のリレーで構成され、
前記リレー制御手段は、
前記車載バッテリの充電開始に先立って前記第一および第二のリレーを閉成制御するとともに、前記車載バッテリの充電終了後、第一の監視時間を経過するまで、前記第一のリレーを開放制御して前記第二のリレーを閉成制御のままとし、次いで第二の監視時間を経過するまで、前記第一のリレーを閉成制御して前記第二のリレーを開放制御し、
前記検出手段は、
前記車載バッテリの充電終了後の前記第一の監視時間内に前記計測手段により計測された前記充電用電力の出力電圧に基づいて、前記第一のリレーの閉固着を検出するとともに、前記第一の監視時間経過後の前記第二の監視時間内に前記計測手段により計測された前記充電用電力の出力電圧に基づいて、前記第二のリレーの閉固着を検出する
ことを特徴とする充電システム。 The charging system according to claim 1 or 2,
The relay is
The first relay arranged on one of the positive electrode side and the negative electrode side line constituting the charging line, and the second relay arranged on the other of the positive electrode side and the negative electrode side line,
The relay control means includes
Prior to starting charging of the in-vehicle battery, the first and second relays are closed and controlled, and after completion of charging of the in-vehicle battery, the first relay is opened until a first monitoring time elapses. The second relay remains in the closed control, and then the first relay is closed and the second relay is opened until the second monitoring time elapses.
The detection means includes
Based on the output voltage of the charging power measured by the measuring means within the first monitoring time after completion of charging of the in-vehicle battery, the first relay is detected to be closed and the first A charging system characterized by detecting closed adhering of the second relay based on an output voltage of the charging power measured by the measuring means within the second monitoring time after the elapse of the monitoring time. . 請求項３に記載の充電システムであって、
前記電力供給手段は、
前記充電用電力の供電停止後、前記充電器側通信手段を介して前記電動車両に、前記第一および第二の監視時間を通知する
ことを特徴とする充電システム。 The charging system according to claim 3,
The power supply means
After the supply of the power for charging is stopped, the first and second monitoring times are notified to the electric vehicle via the charger-side communication means. 請求項１ないし４のいずれか一項に記載の充電器。   The charger according to any one of claims 1 to 4. 請求項１ないし４のいずれか一項に記載の電動車両。   The electric vehicle according to any one of claims 1 to 4. 電動車両と、前記電動車両の車載バッテリを充電する充電器と、を有する充電システムにおいて、前記電動車両の車両側コネクタおよび前記車載バッテリ間の充電用ラインに配置されたリレーの閉固着を検出する方法であって、
前記リレーは、
前記車両側コネクタを介して前記充電器から給電される制御用電力により動作し、
前記電動車両は、
前記車載バッテリの充電開始に先立って、前記リレーを閉成制御するステップ、
前記車両側コネクタを介して前記充電器から給電される充電用電力により前記車載バッテリが充電されるステップ、
前記車載バッテリの充電終了後に、前記リレーを開放制御するステップ、および
前記充電器から通知された前記充電用電力の出力電圧の計測値に基づいて、前記リレーの閉固着を検出するステップを実施し、
前記充電器は、
前記充電用電力の供電開始に先立って、前記車両側コネクタに装着された当該充電器の充電器側コネクタを介して、前記制御用電力の供電を開始するステップ、
前記充電器側コネクタを介して前記充電用電力を供電するステップ、および
前記充電用電力の供電停止後、前記制御用電力の供電を継続するとともに、前記充電用電力の出力電圧を計測し、前記電動車両に当該計測値を通知するステップを実施する
ことを特徴とするリレーの閉固着を検出する方法。 In a charging system having an electric vehicle and a charger for charging an in-vehicle battery of the electric vehicle, detection of closed adhesion of a relay disposed on a charging line between the vehicle-side connector of the electric vehicle and the in-vehicle battery is detected. A method,
The relay is
Operates with control power supplied from the charger via the vehicle-side connector,
The electric vehicle is
Prior to starting charging of the in-vehicle battery, closing the relay is controlled,
Charging the vehicle battery with charging power fed from the charger via the vehicle-side connector;
After charging of the in-vehicle battery is completed, the relay is controlled to be opened, and the relay is detected to be closed based on the measured value of the output voltage of the charging power notified from the charger. ,
The charger is
Prior to the start of supplying the charging power, starting the supply of the control power via the charger-side connector of the charger attached to the vehicle-side connector;
Supplying the charging power via the charger-side connector; and, after stopping supplying the charging power, continuing to supply the control power, measuring an output voltage of the charging power, A method for detecting closed adhesion of a relay, comprising performing a step of notifying the electric vehicle of the measurement value.
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