JP5544499B2 - Battery charging system and battery charging method - Google Patents

Battery charging system and battery charging method Download PDF

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JP5544499B2
JP5544499B2 JP2012524472A JP2012524472A JP5544499B2 JP 5544499 B2 JP5544499 B2 JP 5544499B2 JP 2012524472 A JP2012524472 A JP 2012524472A JP 2012524472 A JP2012524472 A JP 2012524472A JP 5544499 B2 JP5544499 B2 JP 5544499B2
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広行 蛇口
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Alps Green Devices Co Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/46—Accumulators structurally combined with charging apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/30—Constructional details of charging stations
    • B60L53/305—Communication interfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/30—Constructional details of charging stations
    • B60L53/34—Plug-like or socket-like devices specially adapted for contactless inductive charging of 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
    • B60L53/66—Data transfer between charging stations and vehicles
    • B60L53/665—Methods related to measuring, billing or payment
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using 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
    • Y02T10/70—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
    • Y02T90/16—Information or communication technologies improving the operation of electric vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/16—Information or communication technologies improving the operation of electric vehicles
    • Y02T90/167—Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of electric vehicles [EV] or hybrid vehicles [HEV]
    • 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
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S30/00—Systems supporting specific end-user applications in the sector of transportation
    • Y04S30/10—Systems supporting the interoperability of electric or hybrid vehicles
    • Y04S30/14—Details associated with the interoperability, e.g. vehicle recognition, authentication, identification or billing

Description

本発明は、電流センサを用いたバッテリ充電システム及びバッテリ充電方法に関する。   The present invention relates to a battery charging system and a battery charging method using a current sensor.

近年、蓄電器を搭載し、エンジンで発電した電気を用いてモータを駆動するハイブリット自動車や電気自動車などが注目を浴びている。電気自動車は、外部から充電を行うが、ハイブリッド自動車においても、外部から充電可能な構成とすることも検討されている（特許文献１）。   In recent years, hybrid cars, electric cars, and the like, which are equipped with a capacitor and drive a motor using electricity generated by an engine, have attracted attention. Although an electric vehicle is charged from the outside, it is also considered that a hybrid vehicle can be charged from the outside (Patent Document 1).

電気自動車に対して充電する方式として、チャデモ・プロトコルがある。このチャデモ・プロトコルにおいては、車両のエンジンコントロールユニット（ＥＣＵ）からのバッテリの状態に応じた指令にしたがって直流電流を供給する。具体的にチャデモ・プロトコルでは、充電器側から動作開始信号を送り、次に、車両側から充電許可信号及び充電条件の指令情報が充電器に送られ、それに沿って充電器側から充電電流が送出される。このようなチャデモ・プロトコルを用いて、どの車両にも充電を行うことが検討されている。   There is a CHAdeMO protocol as a method of charging an electric vehicle. In this CHAdeMO protocol, a direct current is supplied according to a command according to the state of the battery from the engine control unit (ECU) of the vehicle. Specifically, in the CHAdeMO protocol, an operation start signal is sent from the charger side, and then a charging permission signal and charging condition command information are sent from the vehicle side to the charger, along with the charging current from the charger side. Sent out. It is considered to charge any vehicle using such a CHAdeMO protocol.

特開２００９−１３６１０９号公報JP 2009-136109 A

電気自動車においては、蓄電量の多いリチウムイオンバッテリの搭載が増え、今後、主流になると考えられている。リチウムイオンバッテリは過充電すると、負極側では金属リチウムが析出し電池性能が著しく劣化し寿命を縮め、正極側では電解液の酸化や電極の結晶構造の破壊が起きて発熱する恐れがある。また、過放電すると正負電極とも電極材料の一部が溶出するため電池性能が著しく劣化し、発熱する。最悪の場合、過充電あるいは過放電による発熱によって電解液が気化して爆発に至る可能性もある。そのため、リチウムイオンバッテリでは充放電を正確に把握・制御する必要があり、バッテリ本体又は自動車に電流センサを搭載し、バッテリに流れる電流を正確に計測することが望まれる。電流センサの精度が良好でない場合は、安全のためのマージンを大きくとる必要があり、リチウムイオンバッテリの本来の蓄電量を活かせず、少ない充放電量に抑えて使うことになってしまうため、電池としての利用効率が著しく低下する。   In an electric vehicle, the mounting of a lithium ion battery with a large amount of stored electricity is increasing, and it is considered that it will become mainstream in the future. When the lithium ion battery is overcharged, metallic lithium is deposited on the negative electrode side, the battery performance is remarkably deteriorated and the life is shortened, and on the positive electrode side, there is a possibility that the electrolyte solution is oxidized and the crystal structure of the electrode is broken to generate heat. In addition, when overdischarged, part of the electrode material is eluted from both the positive and negative electrodes, so that the battery performance is significantly deteriorated and heat is generated. In the worst case, the electrolyte solution may vaporize due to heat generation due to overcharge or overdischarge, leading to explosion. Therefore, it is necessary to accurately grasp and control charging / discharging in a lithium ion battery, and it is desired to mount a current sensor on the battery body or the automobile and accurately measure the current flowing through the battery. If the accuracy of the current sensor is not good, it is necessary to secure a large margin for safety, and the battery will be used with a small amount of charge / discharge without using the original amount of storage of the lithium ion battery. As a result, the utilization efficiency of the battery is significantly reduced.

また、電気自動車を普及させるためには、充電インフラの整備も重要と言われており、充電インフラを事業として成立させるためには、充電器側にも充電量に応じた課金などのために充電電流を正確に計測する電流センサが望まれる。   In addition, it is said that it is important to develop a charging infrastructure in order to popularize electric vehicles. In order to establish a charging infrastructure as a business, the charger side is also charged for charging according to the amount of charge. A current sensor that accurately measures current is desired.

本発明はかかる点に鑑みてなされたものであり、電気自動車のより安全な利用と、バッテリの本来の能力の十分な活用とを両立するために、より充電精度の良好なバッテリ充電システム及びバッテリ充電方法を提供することを目的とする。   The present invention has been made in view of the above points, and in order to achieve both safer use of an electric vehicle and sufficient use of the original capacity of the battery, a battery charging system and a battery having better charging accuracy. An object is to provide a charging method.

本発明のバッテリ充電システムは、電力インタフェース、前記電力インタフェースを介して電力を受けるバッテリ、前記バッテリに供給された電流を計測する第１電流センサ、及び前記電力インタフェースを介して信号の送受信を行う通信手段を備えた車両と、電力インタフェース、前記電力インタフェースを介して電力を供給する電力供給部、前記車両に供給する電流を計測する第２電流センサ、前記第２電流センサの測定した電流値を基に前記電力供給部を制御する制御部、及び前記電力インタフェースを介して信号の送受信を行う通信手段を備えた充電装置と、を具備し、前記充電装置は、前記バッテリへの充電を開始する前に、前記車両に対して複数のレベルのセンサ感度確認用電流を、前記電力インタフェースを介して供給し、前記車両は、前記センサ感度確認用電流を前記第１電流センサで測定し、前記充電装置あるいは前記車両において、各レベルの前記センサ感度確認用電流に対する前記第１電流センサの測定値が所定値に対して特定の範囲内にあることを確認した後に前記充電を開始する。


The battery charging system according to the present invention includes a power interface, a battery that receives power through the power interface, a first current sensor that measures a current supplied to the battery, and communication that transmits and receives signals through the power interface. group and the vehicle having means, power interface, the power supply unit for supplying power through said power interface, a second current sensor for measuring the current supplied to the vehicle, the measured current value of the second current sensor A control unit that controls the power supply unit , and a charging device that includes a communication unit that transmits and receives signals via the power interface, and the charging device is configured to start charging the battery. In addition, a plurality of levels of sensor sensitivity confirmation currents are supplied to the vehicle via the power interface. The vehicle measures the sensor sensitivity confirmation current with the first current sensor. In the charging device or the vehicle, the measured value of the first current sensor with respect to the sensor sensitivity confirmation current at each level is a predetermined value. The charging is started after confirming that it is within a specific range.


この構成によれば、充電装置の電流センサと車両の電流センサの感度が一致しているかどうかを調べた後に充電を開始するので、充電の際に正確な充電量で充電を行うことができ、バッテリを過充電してしまうリスクを減らし、安全で、かつバッテリの性能を有効に活用でき、バッテリ寿命を長くすることができる。   According to this configuration, since the charging is started after checking whether or not the sensitivity of the current sensor of the charging device and the current sensor of the vehicle match, charging can be performed with an accurate charge amount at the time of charging, The risk of overcharging the battery can be reduced, the battery performance can be effectively utilized, and the battery life can be extended.

本発明のバッテリ充電システムにおいては、前記充電装置は前記車両と接続したことを検出する接続検出手段を具備し、前記接続検出手段が前記接続を検出したときに、前記充電装置が所定の信号を前記車両に前記電力インタフェースを介して送信することが好ましい。   In the battery charging system of the present invention, the charging device includes connection detection means for detecting connection with the vehicle, and the charging device outputs a predetermined signal when the connection detection means detects the connection. It is preferable to transmit to the vehicle via the power interface.

本発明のバッテリ充電方法は、充電装置から車両のバッテリに対して電力を供給して充電を行うバッテリ充電システムにおけるバッテリ充電方法であって、前記充電装置から前記車両に対して複数のレベルのセンサ感度確認用電流を、電力インタフェースを介して供給する工程と、前記車両において、前記センサ感度確認用電流を第１電流センサで測定する工程と、各レベルの前記センサ感度確認用電流に対する前記第１電流センサの測定値が所定値に対して特定の範囲内にあることを確認した後に前記充電を開始する工程とを具備する。
The battery charging method of the present invention is a battery charging method in a battery charging system for charging by supplying electric power from a charging device to a vehicle battery, and a plurality of levels of sensors from the charging device to the vehicle. Supplying a sensitivity confirmation current via a power interface; measuring a sensor sensitivity confirmation current with a first current sensor in the vehicle; and the first for each level of the sensor sensitivity confirmation current. And starting the charging after confirming that the measured value of the current sensor is within a specific range with respect to the predetermined value.

この方法によれば、充電装置の電流センサと車両の電流センサの感度が一致しているかどうかを調べた後に充電を開始するので、充電の際に正確な充電量で充電を行うことができ、バッテリを過充電してしまうリスクを減らし、安全で、かつバッテリの性能を有効に活用でき、バッテリ寿命を長くすることができる。   According to this method, since charging is started after checking whether the sensitivity of the current sensor of the charging device and the current sensor of the vehicle match, charging can be performed with an accurate charge amount at the time of charging, The risk of overcharging the battery can be reduced, the battery performance can be effectively utilized, and the battery life can be extended.

本発明のバッテリ充電方法においては、前記充電装置と前記車両の接続を検出したときに、前記充電装置が所定の信号を前記車両に前記電力インタフェースを介して送信する工程を具備することが好ましい。   In the battery charging method of the present invention, it is preferable that the battery charging method further includes a step of transmitting a predetermined signal to the vehicle via the power interface when the connection between the charging device and the vehicle is detected.

本発明の充電装置は、充電装置から車両のバッテリに対して電力を供給して充電を行うバッテリ充電システムの充電装置であって、電力インタフェースと、前記電力インタフェースを介して電力を供給する電力供給部と、前記車両に供給した電流を計測する電流センサと、前記電流センサの測定した電流値を基に前記電力供給部を制御する制御部と、前記電力インタフェースを介して信号の送受信を行う通信手段とを具備し、前記制御部は、前記バッテリへの充電を開始する前に、前記充電装置から前記車両に対して複数のレベルのセンサ感度確認用電流を、前記電力インタフェースを介して供給し、前記車両の電流センサが測定した各レベルの前記センサ感度確認用電流の測定値を前記車両から受信し、前記制御部は、各レベルの前記センサ感度確認用電流に対する前記受信した測定値が所定値に対して特定の範囲内にあることを確認した後に前記充電を開始する制御を行う。
The charging device of the present invention is a charging device for a battery charging system that supplies power to a battery of a vehicle from the charging device to perform charging, and includes a power interface and a power supply that supplies power via the power interface. Unit , a current sensor that measures a current supplied to the vehicle, a control unit that controls the power supply unit based on a current value measured by the current sensor, and a communication that transmits and receives signals via the power interface And the controller supplies a plurality of levels of sensor sensitivity confirmation current from the charging device to the vehicle via the power interface before starting charging the battery. , the measured value of the sensor sensitivity confirmation current of each level by the current sensor of the vehicle is measured received from the vehicle, the control unit, the sensor for each level It performs control measurements the received relative sensitivity confirmation current starts the charging after confirming that it is in a specific range with respect to a predetermined value.

本発明の車両は、充電装置から車両のバッテリに対して電力を供給して充電を行うバッテリ充電システムに対応する車両であって、電力インタフェースと、前記電力インタフェースを介して電力を受けるバッテリと、前記バッテリに供給された電流を計測する電流センサと、前記電力インタフェースを介して信号の送受信を行う通信手段と、前記充電装置との間において、前記電流センサ及び前記充電装置の電流センサのセンサ感度を確認した後に充電を開始する制御を行う制御手段と、を具備する。

A vehicle according to the present invention is a vehicle corresponding to a battery charging system that supplies power to a battery of a vehicle from a charging device and performs charging, and includes a power interface, a battery that receives power through the power interface, Sensor sensitivity of the current sensor and the current sensor of the charging device between the current sensor for measuring the current supplied to the battery, communication means for transmitting and receiving signals via the power interface, and the charging device Control means for performing control to start charging after confirming the above.

本発明によれば、充電装置の電流センサと車両の電流センサの感度が一致しているかどうかを調べた後に充電を開始するので、充電の際に正確な充電量で充電を行うことができ、バッテリを過充電してしまうリスクを減らし、安全で、かつバッテリの性能を有効に活用でき、バッテリ寿命を長くすることができる。さらに、本発明によれば、車両の電流センサは充電する度に電流検出の感度をチェックしているため、常に精度が良好に保たれるため、充電時のみならず放電時の電流検出精度も良好で、過放電のリスクを減らすことができ、放電すなわち電気自動車が走行しているときについても、安全でかつバッテリの性能を有効に活用でき、バッテリ寿命を長くすることができる。すなわち、本発明によれば、電気自動車のより安全な利用と、バッテリの本来の能力の十分な活用とを両立するために、より精度良く充電を行うことができる。   According to the present invention, since charging is started after checking whether or not the sensitivity of the current sensor of the charging device and the current sensor of the vehicle match, charging can be performed with an accurate charge amount when charging, The risk of overcharging the battery can be reduced, the battery performance can be effectively utilized, and the battery life can be extended. Further, according to the present invention, since the current sensor of the vehicle checks the sensitivity of current detection every time it is charged, the accuracy is always kept good, so that the current detection accuracy at the time of discharging as well as at the time of charging is improved. It is good and can reduce the risk of overdischarge, and even when discharging, that is, when the electric vehicle is running, it is safe and the battery performance can be used effectively, and the battery life can be extended. That is, according to the present invention, it is possible to perform charging more accurately in order to achieve both safer use of the electric vehicle and sufficient use of the original capacity of the battery.

本発明の実施の形態に係るバッテリ充電システムを示す図である。It is a figure which shows the battery charge system which concerns on embodiment of this invention. 図１に示すバッテリ充電システムの構成を示す図である。It is a figure which shows the structure of the battery charging system shown in FIG. 本発明の実施の形態に係るバッテリ充電方法を説明するためのシーケンス図である。It is a sequence diagram for demonstrating the battery charging method which concerns on embodiment of this invention.

本発明においては、充電を開始する前に、車両の電流センサ及び充電装置の電流センサのセンサ感度を確認（感度が一致しているかの確認）した後に充電を開始する。すなわち、充電装置側からある所定の値（何段階かの電流が望ましい）のセンサ感度確認用電流を流し、車両側の電流センサでその電流を測定し、その測定値が、所定値に対して許容範囲内にあることを確認した上で充電を開始する。この場合において、車両の電流センサ及び充電装置の電流センサのセンサ感度が一致しているかどうかについては、車両側でセンサ感度確認用電流を測定して判断しても良く、車両側でセンサ感度確認用電流を測定し、その測定値を充電装置側に通知して充電装置側で判断しても良い。   In the present invention, before starting charging, charging is started after checking the sensor sensitivity of the vehicle current sensor and the current sensor of the charging device (checking whether the sensitivities match). That is, a sensor sensitivity confirmation current having a predetermined value (preferably several steps of current) is supplied from the charging device side, the current is measured by a current sensor on the vehicle side, and the measured value is compared with the predetermined value. Start charging after confirming that it is within the allowable range. In this case, whether or not the sensor sensitivities of the current sensor of the vehicle and the current sensor of the charging device match may be determined by measuring a sensor sensitivity confirmation current on the vehicle side. The measuring current may be measured, and the measured value may be notified to the charging device side and judged on the charging device side.

車両側の電流センサで測定した測定値が所定値に対して許容範囲内にない場合（許容範囲を超える場合）には、次のような処置が考えられる。
（Ａ）どちらの電流センサが誤っているか不明であるため、充電を開始せず、感度が一致しなかった旨をユーザ（車両側）に通知する（例えば、ディスプレイに表示したり、音声で警告する）。この場合において、具体的にどの程度許容範囲を超えているか誤差の値を車両側で表示し、充電を開始するかどうかの判断をユーザに委ねても良い。
（Ｂ）過充電を避けるために感度の高い方（電流値の大きい方）の電流値にしたがって充電を開始する。特に、過充電が危険であるＬｉイオン二次電池などをバッテリとして搭載している車両については、充電する際に、感度の高い方の電流値にしたがった方が安全である（過充電を防止できる）ので好ましい。

When the measured value measured by the current sensor on the vehicle side is not within the allowable range with respect to the predetermined value (when it exceeds the allowable range), the following measures can be considered.
(A) Since it is unknown which current sensor is wrong, charging is not started and the user (vehicle side) is notified that the sensitivity does not match (for example, displayed on the display or warned by voice) To do). In this case, an error value indicating how much the allowable range is exceeded may be displayed on the vehicle side, and it may be left to the user to determine whether to start charging.
(B) Charging is started in accordance with the current value of the higher sensitivity (the larger current value) in order to avoid overcharging. In particular, for vehicles equipped with Li-ion secondary batteries, etc., where overcharging is dangerous, it is safer to follow the current value with higher sensitivity when charging (to prevent overcharging) It is preferable .

本発明においては、充電装置の電流センサと車両の電流センサの感度が一致しているかどうかを調べた後に充電を開始する。充電装置の電流センサと車両の電流センサの感度が一致していれば、正しい充電量で充電を行うことができるので、バッテリ寿命の向上が図られる。
In the present invention, charging is started after checking whether or not the sensitivities of the current sensor of the charging device and the vehicle current sensor match. If the sensitivity of the current sensor of the charging device and the current sensor of the vehicle match, charging can be performed with the correct amount of charge, thus improving the battery life .

以下、本発明の実施の形態について、添付図面を参照して詳細に説明する。
図１は、本発明の実施の形態に係るバッテリ充電システムを示す図であり、図２は、図１に示すバッテリ充電システムの構成を示す図である。Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
1 is a diagram showing a battery charging system according to an embodiment of the present invention, and FIG. 2 is a diagram showing a configuration of the battery charging system shown in FIG.

本バッテリ充電システムは、図１に示すように、充電器２から車両１のバッテリに対して電力を供給して充電を行うシステムである。この場合において、電力供給は、車両１及び充電器２の電流線（電力インタフェース）を介して行われる。電流線同士は、例えば図１に示すように、車両１のコネクタ１ａと充電器２のコネクタ２ａとがコネクタ結合して接続するように構成されている。なお、この電流線には、車両１と充電器２との間の通信に用いる信号線（電力インタフェース）が配置されており、電流線と信号線で電力インタフェースを構成している。また、パワーラインコミュニケーション（ＰＬＣ）の技術を応用して、電力インタフェースとして電流線が信号線を兼ねている構成でもよい。   As shown in FIG. 1, the battery charging system is a system that supplies power from the charger 2 to the battery of the vehicle 1 to perform charging. In this case, power is supplied through the current lines (power interface) of the vehicle 1 and the charger 2. For example, as illustrated in FIG. 1, the current lines are configured such that the connector 1 a of the vehicle 1 and the connector 2 a of the charger 2 are connected by connector connection. Note that a signal line (power interface) used for communication between the vehicle 1 and the charger 2 is disposed on the current line, and the current line and the signal line constitute a power interface. Further, a configuration in which a current line also serves as a signal line as a power interface may be applied by applying power line communication (PLC) technology.

車両１は、充電器２からバッテリに対して電力を供給して充電を行うバッテリ充電システムに対応する車両（蓄電器）である。車両１は、主制御手段であるエンジン制御ユニット（ＥＣＵ）１１と、電力インタフェースの信号線を介して充電器２との間で信号の送受信を行う通信部１２と、電力インタフェースの電流線に取り付けられ、電流線に流れる電流を測定する電流センサ１３と、電流線を介して電力を受けるバッテリ１４と、充電器２との間の接続を検出する接続検出部１５とから主に構成されている。   The vehicle 1 is a vehicle (capacitor) corresponding to a battery charging system that charges by supplying electric power from the charger 2 to the battery. The vehicle 1 is attached to an engine control unit (ECU) 11 that is a main control means, a communication unit 12 that transmits and receives signals to and from the charger 2 via a signal line of the power interface, and a current line of the power interface. The current sensor 13 for measuring the current flowing in the current line, the battery 14 that receives power through the current line, and the connection detection unit 15 for detecting the connection between the charger 2. .

ＥＣＵ１１は、バッテリ１４の充電状態を監視する。また、ＥＣＵ１１は、接続検出部１５によって充電器２との間の接続が検出されたときに、充電器２との間で電流センサ１３及び充電器２の電流センサ２３のセンサ感度を確認した後に充電を開始する制御を行う。ＥＣＵ１１は、電流センサ１３で測定した感度確認電流の測定値と所定値とを比較して、その差分が許容範囲内にあるか否か（感度が一致しているか否か）を判断する。そして、その判断結果に基づいて、充電を許可する制御信号を充電器２に送信する。これにより、充電器２からの充電が開始される。また、ＥＣＵ１１は、前記判断結果に基づいて、上記（Ａ）〜（Ｃ）のような制御を行う。この場合において、車両のユーザに警告するときには、ディスプレイ（図示せず）に表示したり、音や音声で警告する。
The ECU 11 monitors the state of charge of the battery 14. Further, the ECU 11 confirms the sensor sensitivity of the current sensor 13 and the current sensor 23 of the charger 2 with the charger 2 when the connection detection unit 15 detects the connection with the charger 2. Control to start charging. The ECU 11 compares the measured value of the sensitivity confirmation current measured by the current sensor 13 with a predetermined value, and determines whether or not the difference is within an allowable range (whether or not the sensitivity matches). Then, based on the determination result, a control signal for permitting charging is transmitted to the charger 2. Thereby, charging from the charger 2 is started. Moreover, ECU11 performs control like said (A)-( C ) based on the said determination result. In this case, when a warning is given to the user of the vehicle, the warning is displayed on a display (not shown) or warned by sound or voice.

通信部１２は、ＥＣＵ１１の制御により、電力インタフェースの信号線を介して充電器２との間で信号の送受信を行う。例えば、車両と充電器とのコネクタが結合されると充電器側から動作開始信号を受信し、一方、感度確認開始信号（感度確認のための電流の通電を許可する信号）、充電許可信号（充電のための通電を許可する信号）、充電条件指令情報（バッテリの種類、充電電流、充電電圧、充電時間、これらを組み合わせた充電プロファイルなどの充電条件の情報）、充電禁止信号（充電を停止させるための信号）などを充電器２に送信する。   The communication unit 12 transmits and receives signals to and from the charger 2 through the signal line of the power interface under the control of the ECU 11. For example, when the connector between the vehicle and the charger is coupled, an operation start signal is received from the charger side, while a sensitivity confirmation start signal (a signal for permitting current to be applied for sensitivity confirmation), a charge permission signal ( Charging energies for charging), charging condition command information (battery type, charging current, charging voltage, charging time, charging profile information such as a charging profile combining these), charging prohibition signal (stopping charging) Signal) to transmit to the charger 2.

電流センサ１３は、バッテリ１４に供給された電流、すなわち、電力を供給する際に電流線に通電される電流を測定する。また、電流センサ１３は、感度確認の際に電流線に通電される電流を測定する。電流センサ１３は、測定した電流値（測定値）をＥＣＵ１１に出力する。電流センサ１３としては、例えば、磁気平衡式電流センサや磁気比例式電流センサがある。また、これらの電流センサに用いる磁気検出素子としては、磁気抵抗効果素子やホール素子などを用いることができる。このような電流センサ１３を用いてバッテリの充放電の電流を計測し、積算することによりバッテリの残量管理を行うことができる。電流センサ１３は、バッテリ１４の充放電電流を正確に測定するため、バッテリ１４の直近で測定することが望ましく、バッテリ１４に内蔵しても良い。   The current sensor 13 measures the current supplied to the battery 14, that is, the current passed through the current line when supplying power. Further, the current sensor 13 measures a current passed through the current line when checking the sensitivity. The current sensor 13 outputs the measured current value (measured value) to the ECU 11. Examples of the current sensor 13 include a magnetic balance type current sensor and a magnetic proportional type current sensor. Moreover, as a magnetic detection element used for these current sensors, a magnetoresistive effect element, a Hall element, or the like can be used. The battery remaining amount can be managed by measuring and accumulating the charging / discharging current of the battery using such a current sensor 13. In order to accurately measure the charge / discharge current of the battery 14, the current sensor 13 is desirably measured immediately near the battery 14, and may be built in the battery 14.

バッテリ１４としては、Ｌｉイオン電池、ＮｉＭＨ電池、鉛蓄電池などの充放電を行うバッテリが挙げられる。   Examples of the battery 14 include a battery that performs charging and discharging, such as a Li ion battery, a NiMH battery, and a lead storage battery.

接続検出部１５は、充電器２との間の接続を検出する。接続検出部１５は、例えば、コネクタ１ａと充電器２のコネクタ２ａとがコネクタ結合（誘導結合、静電結合の場合もある）したことを検出し、その旨の制御信号をＥＣＵ１１に出力する。   The connection detection unit 15 detects a connection with the charger 2. For example, the connection detection unit 15 detects that the connector 1a and the connector 2a of the charger 2 have been connector-coupled (in some cases, inductive coupling or electrostatic coupling), and outputs a control signal to that effect to the ECU 11.

充電器２は、車両１のバッテリ１４に対して電力を供給して充電を行うバッテリ充電システムの充電器である。充電器２は、主制御手段である制御部２１と、電力インタフェースの信号線を介して車両１との間で信号の送受信を行う通信部２２と、電力インタフェースの電流線に取り付けられ、電流線に流れる電流を測定する電流センサ２３と、電流線を介して車両１のバッテリ１４に電力を供給する電力供給部２４と、車両１との間の接続を検出する接続検出部２５とから主に構成されている。   The charger 2 is a battery charging system charger that supplies power to the battery 14 of the vehicle 1 for charging. The charger 2 is attached to a control unit 21 that is a main control unit, a communication unit 22 that transmits and receives signals to and from the vehicle 1 via a signal line of the power interface, and a current line of the power interface. Mainly from a current sensor 23 for measuring a current flowing in the vehicle, a power supply unit 24 for supplying power to the battery 14 of the vehicle 1 via a current line, and a connection detection unit 25 for detecting a connection between the vehicle 1 It is configured.

制御部２１は、電力供給部２４の電力供給を制御する。また、制御部２１は、接続検出部２５によって車両１との間の接続が検出されたときに、車両１との間で電流センサ２３及び車両１の電流センサ１３のセンサ感度を確認した後に充電を開始する制御を行う。充電器２が車両１に対して充電の許可を通知する場合には、制御部２１が、感度確認電流の測定値と所定値とを比較して、その差分が許容範囲内にあるか否か（感度が一致しているか否か）を判断する。この場合において、感度確認電流の測定値は、車両１の電流センサ１３で測定した値であり、その値が車両１から充電器２に送信される。そして、その判断結果に基づいて、充電器２の電力供給部２４から車両１のバッテリ１４に対して電力が供給される（充電が開始される）。   The control unit 21 controls the power supply of the power supply unit 24. In addition, when the connection detection unit 25 detects the connection with the vehicle 1, the control unit 21 checks the sensor sensitivity of the current sensor 23 and the current sensor 13 of the vehicle 1 after charging with the vehicle 1. Control to start. When the charger 2 notifies the vehicle 1 of the permission of charging, the control unit 21 compares the measured value of the sensitivity confirmation current with a predetermined value, and whether or not the difference is within the allowable range. (Sensitivity is matched or not) is determined. In this case, the measured value of the sensitivity confirmation current is a value measured by the current sensor 13 of the vehicle 1, and the value is transmitted from the vehicle 1 to the charger 2. Based on the determination result, power is supplied from the power supply unit 24 of the charger 2 to the battery 14 of the vehicle 1 (charging is started).

通信部２２は、制御部２１の制御により、電力インタフェースの信号線を介して車両１との間で信号の送受信を行う。例えば、電流センサの感度確認において、動作開始信号（コネクタが結合されたことを確認の上、動作開始を要求する信号）を車両１に送信し、感度確認開始信号（感度確認のための電流の通電を許可する信号）、充電許可信号（充電のための通電を許可する信号）、充電条件指令情報（バッテリの種類、充電電流、充電電圧、充電時間、これらを組み合わせた充電プロファイルなどの充電条件の情報）、充電禁止信号（充電を停止させるための信号）などを車両１から受信する。   The communication unit 22 transmits and receives signals to and from the vehicle 1 through the signal line of the power interface under the control of the control unit 21. For example, in the sensitivity check of the current sensor, an operation start signal (a signal for requesting an operation start after confirming that the connector is coupled) is transmitted to the vehicle 1, and a sensitivity check start signal (a current for sensitivity check) is transmitted. Charging permission signal (signal to allow energization for charging), charging condition command information (battery type, charging current, charging voltage, charging time, charging conditions combining these, charging conditions, etc.) Information), a charging prohibition signal (a signal for stopping charging), and the like are received from the vehicle 1.

電流センサ２３は、車両に供給した電流、すなわち、電力供給部２４から車両１のバッテリ１４に電力を供給する際に電流線に通電される電流を測定する。電流センサ２３は、測定した電流値（測定値）を制御部２１に出力する。電流センサ２３としては、例えば、シャント抵抗や磁気平衡式電流センサや磁気比例式電流センサがある。また、これらの電流センサに用いる磁気検出素子としては、磁気抵抗効果素子やホール素子などを用いることができる。また、電流センサ２３は、特にコネクタ２ａの直近に設置することで、充電器２から車両１に対して供給する電流をより正確に計測できる。   The current sensor 23 measures the current supplied to the vehicle, that is, the current supplied to the current line when supplying power from the power supply unit 24 to the battery 14 of the vehicle 1. The current sensor 23 outputs the measured current value (measured value) to the control unit 21. Examples of the current sensor 23 include a shunt resistor, a magnetic balanced current sensor, and a magnetic proportional current sensor. Moreover, as a magnetic detection element used for these current sensors, a magnetoresistive effect element, a Hall element, or the like can be used. In addition, the current sensor 23 can be more accurately measured with respect to the current supplied from the charger 2 to the vehicle 1 by installing it in the immediate vicinity of the connector 2a.

電力供給部２４は、電流線を介して車両１のバッテリ１４に電力を供給する。この場合において、電力の供給は、制御部２１により制御される。本発明においては、電力供給部２４は、車両１に対してセンサ感度確認用電流を車両１のバッテリ１４に供給すると共に、車両１において測定された感度確認用電流の測定値が所定値に対して特定の範囲内にあるときに充電用の電力を車両１のバッテリ１４に供給する。なお、センサ感度確認用電流は、少なくとも一つのレベル（電流値）で供給すれば良く、一つのレベルで供給しても良く、複数の異なるレベルで供給しても良い。   The power supply unit 24 supplies power to the battery 14 of the vehicle 1 via a current line. In this case, the supply of power is controlled by the control unit 21. In the present invention, the power supply unit 24 supplies a sensor sensitivity confirmation current to the battery 14 of the vehicle 1 to the vehicle 1 and the measured value of the sensitivity confirmation current measured in the vehicle 1 is a predetermined value. When it is within a specific range, charging power is supplied to the battery 14 of the vehicle 1. The sensor sensitivity confirmation current may be supplied at at least one level (current value), may be supplied at one level, or may be supplied at a plurality of different levels.

電力供給部２４は、蓄電器を備えていることが好ましい。電力供給部２４が蓄電機能を有することで、安価な夜間電力で充電量の電力を蓄電しておくことが可能となる。このように、夜間電力を蓄電しておくことにより、日中に充電を行っても電力コストを低く抑えることができる。また、車両１のバッテリ１４の充電に必要な電力を蓄電しておくことにより、一気に充電することも可能になり、より急速な充電も可能になる。蓄電しない場合は、ＡＣ−ＤＣ変換や昇圧などの処理を行いながら同時に充電するため、その処理能力以上の充電速度にはできず、そのため急速充電する場合は処理能力の高いＡＣ−ＤＣ変換器や昇圧器が必要で非常に高額な充電システムになる。なお、電力供給部２４における蓄電と電力供給（放電）の制御は制御部２１で行う。   The power supply unit 24 preferably includes a battery. Since the power supply unit 24 has a power storage function, it is possible to store a charge amount of power with inexpensive nighttime power. In this way, by storing nighttime power, the power cost can be kept low even if charging is performed during the day. In addition, by accumulating electric power necessary for charging the battery 14 of the vehicle 1, it is possible to charge at a stretch and to charge more rapidly. If the battery is not charged, it is charged at the same time while performing processing such as AC-DC conversion and boosting. Therefore, the charging speed cannot exceed the processing capacity. Therefore, when charging quickly, an AC-DC converter with high processing capacity or A booster is required, resulting in a very expensive charging system. The control of the power storage and power supply (discharge) in the power supply unit 24 is performed by the control unit 21.

接続検出部２５は、車両１との間の接続を検出する。接続検出部２５は、例えば、コネクタ２ａと車両１のコネクタ１ａとがコネクタ結合したことを検出し、その旨の制御信号を制御部２１に出力する。そして制御部２１は、所定の信号（動作開始信号）を車両１に対して信号線を介して送信する。これにより、車両１との間で感度確認の制御が開始する。   The connection detection unit 25 detects a connection with the vehicle 1. For example, the connection detection unit 25 detects that the connector 2a and the connector 1a of the vehicle 1 are connected to each other, and outputs a control signal to that effect to the control unit 21. The control unit 21 transmits a predetermined signal (operation start signal) to the vehicle 1 through the signal line. Thereby, control of sensitivity confirmation with the vehicle 1 is started.

次に、上記構成を有するバッテリ充電システムにおけるバッテリ充電方法について説明する。
本発明のバッテリ充電方法においては、充電器２と車両１との間において、充電器２の電流センサ２３及び車両１の電流センサ１３のセンサ感度を確認した後に充電を開始する。ここで、センサ感度の確認とは、両電流センサ１３，２３の感度が一致しているかの確認、すなわち、充電器２側からある所定の値のセンサ感度確認用電流を流し、車両１側の電流センサ１３でその電流を測定し、その測定値が、所定値に対して許容範囲内にあることの確認をいう。Next, a battery charging method in the battery charging system having the above configuration will be described.
In the battery charging method of the present invention, charging is started between the charger 2 and the vehicle 1 after confirming the sensor sensitivities of the current sensor 23 of the charger 2 and the current sensor 13 of the vehicle 1. Here, the confirmation of the sensor sensitivity is a confirmation of whether or not the sensitivities of the current sensors 13 and 23 coincide with each other, that is, a sensor sensitivity confirmation current having a predetermined value is supplied from the charger 2 side. This is to confirm that the current is measured by the current sensor 13 and that the measured value is within an allowable range with respect to a predetermined value.

図３は、本発明の実施の形態に係るバッテリ充電方法を説明するためのシーケンス図である。
まず、充電器２において、車両１のコネクタ１ａと充電器２のコネクタ２ａとがコネクタ結合（誘導結合、静電結合を含む）されたことを検知したときに、制御部２１は、充電器２から信号線を介して車両１に動作開始信号を送信するように通信部２２に指示する（ＳＴ１１）。FIG. 3 is a sequence diagram for explaining the battery charging method according to the embodiment of the present invention.
First, when the charger 2 detects that the connector 1a of the vehicle 1 and the connector 2a of the charger 2 are connector-coupled (including inductive coupling and electrostatic coupling), the control unit 21 The communication unit 22 is instructed to transmit an operation start signal to the vehicle 1 via the signal line (ST11).

次いで、動作開始信号を受信した車両１においては、ＥＣＵ１１が、第一感度確認開始信号を充電器２に送信するように通信部１２に指示する（ＳＴ１２）。そして、第一感度確認開始信号を受信した充電器２においては、制御部２１が、電力供給部２４から所定の値（例えば、０．５Ａ）の第一感度確認電流を車両１のバッテリ１４に通電するように指示する（ＳＴ１３）。このとき、車両１においては、電流センサ１３で通電された第一感度確認電流を測定する。この測定結果（測定値）はＥＣＵ１１に出力される。ＥＣＵ１１においては、測定値が所定の範囲内にあるかどうか（測定値と所定値との差分が所定の範囲内にあるかどうか）を判断する。そして、測定値が所定範囲内であれば、ＥＣＵ１１は、第二感度確認開始信号を充電器２に送信するように通信部１２に指示する（ＳＴ１４）。一方、測定値が所定範囲内でなければ（測定値が所定範囲を超えれば）、ＥＣＵ１１は、上記（Ａ）〜（Ｃ）のような制御を行う。
Next, in the vehicle 1 that has received the operation start signal, the ECU 11 instructs the communication unit 12 to transmit the first sensitivity confirmation start signal to the charger 2 (ST12). In the charger 2 that has received the first sensitivity confirmation start signal, the control unit 21 supplies a first sensitivity confirmation current having a predetermined value (for example, 0.5 A) to the battery 14 of the vehicle 1 from the power supply unit 24. Instruct to energize (ST13). At this time, in the vehicle 1, the first sensitivity confirmation current energized by the current sensor 13 is measured. This measurement result (measured value) is output to the ECU 11. The ECU 11 determines whether or not the measured value is within a predetermined range (whether or not the difference between the measured value and the predetermined value is within a predetermined range). If the measured value is within the predetermined range, the ECU 11 instructs the communication unit 12 to transmit the second sensitivity confirmation start signal to the charger 2 (ST14). On the other hand, if the measured value is not within the predetermined range (if the measured value exceeds the predetermined range), the ECU 11 performs the control as described in (A) to ( C ) above.

第二感度確認開始信号を受信した充電器２においては、制御部２１が、電力供給部２４から所定の値（例えば、１０Ａ）の第二感度確認電流を車両１のバッテリ１４に通電するように指示する（ＳＴ１５）。このとき、車両１においては、電流センサ１３で通電された第二感度確認電流を測定する。この測定結果（測定値）はＥＣＵ１１に出力される。ＥＣＵ１１においては、測定値が所定の範囲内にあるかどうか（測定値と所定値との差分が所定の範囲内にあるかどうか）を判断する。そして、測定値が所定範囲内であれば、ＥＣＵ１１は、充電許可信号及び充電条件指令情報を充電器２に送信するように通信部１２に指示する（ＳＴ１６）。一方、測定値が所定範囲内でなければ（測定値が所定範囲を超えれば）、ＥＣＵ１１は、上記（Ａ）〜（Ｃ）のような制御を行う。

In the charger 2 that has received the second sensitivity confirmation start signal, the control unit 21 applies a second sensitivity confirmation current of a predetermined value (for example, 10 A) to the battery 14 of the vehicle 1 from the power supply unit 24. Instruct (ST15). At this time, in the vehicle 1, the second sensitivity confirmation current energized by the current sensor 13 is measured. This measurement result (measured value) is output to the ECU 11. The ECU 11 determines whether or not the measured value is within a predetermined range (whether or not the difference between the measured value and the predetermined value is within a predetermined range). If the measured value is within the predetermined range, the ECU 11 instructs the communication unit 12 to transmit the charging permission signal and the charging condition command information to the charger 2 (ST16). On the other hand, if the measured value is not within the predetermined range (if the measured value exceeds the predetermined range), the ECU 11 performs the control as described in (A) to ( C ) above.

次いで、充電許可信号及び充電条件指令情報を受信した充電器２においては、制御部２１が、充電条件指令情報にしたがって、電力供給部２４から車両１のバッテリ１４に充電するように指示する（ＳＴ１７）。車両１のＥＣＵ１１は、バッテリ１４の充電状態を監視しているので、バッテリ１４の充電状態がＦＵＬＬになった場合や、所定値まで充電が完了したときには、ＥＣＵ１１は、充電禁止信号を充電器２に送信するように通信部１２に指示する（ＳＴ１８）する。このようにして充電が完了する。   Next, in the charger 2 that has received the charging permission signal and the charging condition command information, the control unit 21 instructs the battery 14 of the vehicle 1 to be charged from the power supply unit 24 in accordance with the charging condition command information (ST17). ). Since the ECU 11 of the vehicle 1 monitors the charging state of the battery 14, when the charging state of the battery 14 becomes FULL or when the charging is completed to a predetermined value, the ECU 11 sends a charging prohibition signal to the charger 2. The communication unit 12 is instructed to transmit to (ST18). In this way, charging is completed.

このように、本発明のバッテリ充電方法によれば、充電器２の電流センサ２３と車両１の電流センサ１３の感度が一致しているかどうかを調べた後に充電を開始するので、充電の際に正確な充電量で充電を行うことができ、バッテリ寿命を長くすることができる。すなわち、本発明のバッテリ充電方法によれば、電気自動車のより安全な利用と、バッテリの本来の能力の十分な活用とを両立するために、より精度良く充電を行うことができる。   Thus, according to the battery charging method of the present invention, charging is started after checking whether or not the sensitivities of the current sensor 23 of the charger 2 and the current sensor 13 of the vehicle 1 coincide with each other. Charging can be performed with an accurate charge amount, and the battery life can be extended. That is, according to the battery charging method of the present invention, charging can be performed with higher accuracy in order to achieve both safer use of the electric vehicle and sufficient use of the original capacity of the battery.

本発明は上記実施の形態に限定されず、種々変更して実施することができる。上記実施の形態のシーケンスの説明においては、車両１の電流センサ１３及び充電器２の電流センサ２３のセンサ感度が一致しているかどうかについて、車両側でセンサ感度確認用電流を測定して判断する場合について説明しているが、本発明においては、車両１の電流センサ１３及び充電器２の電流センサ２３のセンサ感度が一致しているかどうかについて、車両側でセンサ感度確認用電流を測定し、その測定値を充電器側に通知して充電器側で判断しても良い。その他、本発明は、本発明の範囲を逸脱しないで適宜変更して実施することができる。   The present invention is not limited to the above embodiment, and can be implemented with various modifications. In the description of the sequence of the above embodiment, whether or not the sensor sensitivities of the current sensor 13 of the vehicle 1 and the current sensor 23 of the charger 2 match is determined by measuring the sensor sensitivity confirmation current on the vehicle side. In the present invention, the sensor sensitivity confirmation current is measured on the vehicle side to determine whether or not the sensor sensitivities of the current sensor 13 of the vehicle 1 and the current sensor 23 of the charger 2 match. The measured value may be notified to the charger side and judged on the charger side. In addition, the present invention can be implemented with appropriate modifications without departing from the scope of the present invention.

本発明は、電気自動車やハイブリッドカーのバッテリ充電システム及びバッテリ充電方法に適用することが可能である。   The present invention can be applied to battery charging systems and battery charging methods for electric vehicles and hybrid cars.

本出願は、２０１０年７月１２日出願の特願２０１０−１５７９８１に基づく。この内容は、全てここに含めておく。   This application is based on Japanese Patent Application No. 2010-157981 for which it applied on July 12, 2010. All this content is included here.

Claims (6)

電力インタフェース、前記電力インタフェースを介して電力を受けるバッテリ、前記バッテリに供給された電流を計測する第１電流センサ、及び前記電力インタフェースを介して信号の送受信を行う通信手段を備えた車両と、
電力インタフェース、前記電力インタフェースを介して電力を供給する電力供給部、前記車両に供給する電流を計測する第２電流センサ、前記第２電流センサの測定した電流値を基に前記電力供給部を制御する制御部、及び前記電力インタフェースを介して信号の送受信を行う通信手段を備えた充電装置と、を具備し、
前記充電装置は、前記バッテリへの充電を開始する前に、前記車両に対して複数のレベルのセンサ感度確認用電流を、前記電力インタフェースを介して供給し、
前記車両は、前記センサ感度確認用電流を前記第１電流センサで測定し、
前記充電装置あるいは前記車両において、各レベルの前記センサ感度確認用電流に対する前記第１電流センサの測定値が所定値に対して特定の範囲内にあることを確認した後に前記充電を開始する
ことを特徴とするバッテリ充電システム。 A vehicle including a power interface, a battery that receives power through the power interface, a first current sensor that measures a current supplied to the battery, and a communication unit that transmits and receives signals through the power interface;
Power interface, the power supply unit for supplying power through said power interface, a second current sensor for measuring the current supplied to the vehicle, controls the power supply unit based on the measured current value of the second current sensor And a charging device comprising a communication means for transmitting and receiving signals via the power interface,
The charging device supplies a plurality of levels of sensor sensitivity confirmation currents to the vehicle via the power interface before starting charging the battery,
The vehicle measures the sensor sensitivity confirmation current with the first current sensor,
In the charging device or the vehicle, the charging is started after confirming that the measured value of the first current sensor for each level of the sensor sensitivity confirmation current is within a specific range with respect to a predetermined value.
A battery charging system characterized by that. 前記充電装置は前記車両と接続したことを検出する接続検出手段を具備し、前記接続検出手段が前記接続を検出したときに、前記充電装置が所定の信号を前記車両に前記電力インタフェースを介して送信することを特徴とする請求項１記載のバッテリ充電システム。 The charging device includes connection detection means for detecting that the vehicle is connected to the vehicle, and when the connection detection means detects the connection, the charging device sends a predetermined signal to the vehicle via the power interface. claim 1 Symbol placement battery charging system and transmitting. 充電装置から車両のバッテリに対して電力を供給して充電を行うバッテリ充電システムにおけるバッテリ充電方法であって、
前記充電装置から前記車両に対して複数のレベルのセンサ感度確認用電流を、電力インタフェースを介して供給する工程と、
前記車両において、前記センサ感度確認用電流を第１電流センサで測定する工程と、
各レベルの前記センサ感度確認用電流に対する前記第１電流センサの測定値が所定値に対して特定の範囲内にあることを確認した後に前記充電を開始する工程と
を具備することを特徴とするバッテリ充電方法。 A battery charging method in a battery charging system for charging by supplying electric power from a charging device to a vehicle battery,
Supplying a plurality of levels of sensor sensitivity confirmation current from the charging device to the vehicle via a power interface;
Measuring the sensor sensitivity confirmation current with a first current sensor in the vehicle;
Starting the charging after confirming that the measured value of the first current sensor for each level of the sensor sensitivity confirmation current is within a specific range with respect to a predetermined value;
A battery charging method comprising: 前記充電装置と前記車両の接続を検出したときに、前記充電装置が所定の信号を前記車両に前記電力インタフェースを介して送信する工程を具備することを特徴とする請求項３記載のバッテリ充電方法。 The battery charging method according to claim 3 , further comprising a step of transmitting a predetermined signal to the vehicle via the power interface when the connection between the charging device and the vehicle is detected. . 充電装置から車両のバッテリに対して電力を供給して充電を行うバッテリ充電システムの充電装置であって、
電力インタフェースと、
前記電力インタフェースを介して電力を供給する電力供給部と、
前記車両に供給した電流を計測する電流センサと、
前記電流センサの測定した電流値を基に前記電力供給部を制御する制御部と、
前記電力インタフェースを介して信号の送受信を行う通信手段とを具備し、
前記制御部は、前記バッテリへの充電を開始する前に、前記充電装置から前記車両に対して複数のレベルのセンサ感度確認用電流を、前記電力インタフェースを介して供給し、
前記車両の電流センサが測定した各レベルの前記センサ感度確認用電流の測定値を前記車両から受信し、
前記制御部は、各レベルの前記センサ感度確認用電流に対する前記受信した測定値が所定値に対して特定の範囲内にあることを確認した後に前記充電を開始する制御を行う
ことを特徴とする充電装置。 A charging device of a battery charging system for charging by supplying electric power from a charging device to a vehicle battery,
A power interface;
A power supply unit for supplying power via the power interface,
A current sensor for measuring the current supplied to the vehicle;
A control unit for controlling the power supply unit based on a current value measured by the current sensor;
Communication means for transmitting and receiving signals via the power interface ,
The control unit supplies a plurality of levels of sensor sensitivity confirmation current from the charging device to the vehicle via the power interface before starting charging the battery.
Receiving the measured value of the sensor sensitivity confirmation current of each level measured by the current sensor of the vehicle from the vehicle;
The control unit is characterized by performing control measurements the received relative to the sensor sensitivity confirmation current in each level to start the charging after confirming that it is in a specific range with respect to a predetermined value Charging device. 充電装置から車両のバッテリに対して電力を供給して充電を行うバッテリ充電システムに対応する車両であって、電力インタフェースと、前記電力インタフェースを介して電力を受けるバッテリと、前記バッテリに供給された電流を計測する電流センサと、前記電力インタフェースを介して信号の送受信を行う通信手段と、前記充電装置との間において、前記電流センサ及び前記充電装置の電流センサのセンサ感度を確認した後に充電を開始する制御を行う制御手段と、を具備することを特徴とする車両。

A vehicle corresponding to a battery charging system for charging by supplying power to a battery of a vehicle from a charging device, the battery receiving power through the power interface, and the battery supplied to the battery Between the current sensor for measuring current, the communication means for transmitting and receiving signals via the power interface, and the charging device, charging is performed after the sensor sensitivity of the current sensor and the current sensor of the charging device is confirmed. And a control means for performing control to start.

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