WO2012074094A1 - Secondary-battery system and electric vehicle - Google Patents

Secondary-battery system and electric vehicle Download PDF

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Publication number
WO2012074094A1
WO2012074094A1 PCT/JP2011/077919 JP2011077919W WO2012074094A1 WO 2012074094 A1 WO2012074094 A1 WO 2012074094A1 JP 2011077919 W JP2011077919 W JP 2011077919W WO 2012074094 A1 WO2012074094 A1 WO 2012074094A1
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Prior art keywords
battery
charging
converter
operating
batteries
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PCT/JP2011/077919
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French (fr)
Japanese (ja)
Inventor
隆 藤永
康志 光山
橋本　英樹
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三菱重工業株式会社
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Publication of WO2012074094A1 publication Critical patent/WO2012074094A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
    • B60L58/21—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules having the same nominal voltage
    • 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
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/52—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells characterised by DC-motors
    • 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
    • B60L53/80—Exchanging energy storage elements, e.g. removable batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
    • 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

Definitions

  • the present invention relates to a secondary battery system and an electric vehicle including the same.
  • a secondary battery system includes a plurality of charging batteries connected in parallel to each other, a converter that adjusts and outputs a voltage input from the charging battery, and is charged by an output of the converter to a load.
  • An operating battery for supplying electric power.
  • a charging battery and an operating battery are prepared, and a voltage is adjusted by a converter from a plurality of charging batteries connected in parallel and output to the operating battery, and the operating battery is charged. Power is supplied from the operating battery to a load such as a motor. Thereby, it becomes possible to equalize the lifetime of the some battery (charge battery) connected in parallel.
  • switching means for selectively connecting any of the charging batteries to the converter may be provided between the converter and the charging battery.
  • one of the charging batteries can be selectively connected to the converter by the switching means according to the charged amount of each charging battery.
  • the converter may repeatedly charge and stop the operating battery by a predetermined amount while the remaining amount of the operating battery becomes a predetermined level or less.
  • the operating battery when the operating battery becomes less than a predetermined predetermined remaining amount, when charging the operating battery from the charging battery to the operating battery by the converter, the operating battery is charged by a predetermined amount instead of being fully charged. Repeat the charging process. Thereby, it becomes possible to extend the life of the battery for operation compared with the case where full charge is repeated from discharge.
  • the switching means may perform switching based on a detected value of a voltage of the charging battery and / or a charging current of the operating battery.
  • the voltage of the charging battery and the charging current of the operating battery are detected, and the switching means is switched based on the detected voltage. Thereby, it becomes possible to make the lifetimes of a plurality of charging batteries uniform.
  • the electric vehicle of the present invention includes any one of the above secondary battery systems.
  • the effect of any of the above secondary battery systems can be imparted to the electric vehicle.
  • the electric vehicle of the present invention may include a driving vehicle provided with the operating battery and a towing vehicle provided with the charging battery and towed by the driving vehicle.
  • the towing vehicle provided with the charging battery is towed by the driving vehicle, so that the cost of vehicle development can be suppressed. Further, by replacing the entire towing vehicle, it is possible to easily and efficiently replace the charging battery in a short time. Furthermore, a towing vehicle equipped with a rechargeable battery can be used alone as a power source for disasters, event venues, and construction.
  • the battery for operation and the battery for operation are prepared, and the battery for operation is prepared by adjusting the voltage with a converter from a plurality of batteries connected in parallel.
  • a converter from a plurality of batteries connected in parallel.
  • the secondary battery system A of the present embodiment includes a plurality of charging batteries 2, 3, 4, a converter (DC-DC converter) 5, and an operating battery 7, as shown in FIG.
  • the plurality of charging batteries 2, 3, 4 are connected in parallel to each other.
  • Converter 5 adjusts and outputs the voltage input from charging batteries 2-4.
  • the operating battery 7 is charged by the output of the converter 5 and supplies power to a load 6 such as a motor.
  • the amount of power of each of the plurality of charging batteries 2 to 4 and the operating battery 7 is, for example, 15 kWh.
  • switching means for selectively connecting any of the charging batteries 2 to 4 to the converter 5 between the converter 5 and the charging batteries 2 to 4.
  • a switching unit 8.
  • the secondary battery system A includes a first voltage detecting means 9 for detecting the voltages of the charging batteries 2 to 4, a second voltage detecting means 10 for detecting the voltage of the operating battery 7, and the operating battery 7.
  • Current detecting means 11 for detecting the charging current and a charger function unit 12.
  • the charger function unit 12 includes a converter 5, first voltage detection means 9, second voltage detection means 10, and current detection means 11.
  • detection values by the first voltage detection means 9, the second voltage detection means 10 and the current detection means 11 are sent to the control means 13.
  • the control means 13 controls the switching means 8 and the converter 5 based on the voltage values of the charging batteries 2 to 4 and / or the detected value of the charging current of the operating battery 7.
  • charging batteries 2 to 4 and an operating battery 7 are prepared as the battery 1, and a plurality of charging batteries 2 to 2 connected in parallel are prepared.
  • the voltage is adjusted from 4 to the converter 5 and output to the operating battery 7, and the operating battery 7 is charged.
  • power is not supplied from the plurality of batteries 1 connected in parallel to the load 6 such as a motor as in the prior art, but power is supplied from the operating battery 7 to the load 6.
  • any one of the charging batteries 2 to 4 is selectively connected to the converter 5 by the switching means 8 from the plurality of charging batteries 2 to 4 according to the charged amount of each of the charging batteries 2 to 4.
  • the switching means 8 sequentially connects the charging batteries 2 to 4 to the converter 5 according to the amount of charge of each charging battery 2 to 4, and uses the second charging battery 3 at the earliest. Charging is performed in the middle of using the third charging battery 4 at the latest. Since the repeated use life of the batteries 2 to 4 becomes shorter as the power consumption increases, the charging batteries 2 to 4 are selectively used by the switching means 8 in this way, whereby each charging battery 2 The remaining life of ⁇ 4 can be made uniform.
  • the charging battery 2 having a long remaining life is combined. Reduce the remaining amount of switching. That is, for example, it is assumed that there are three charging batteries 2 to 4 and the remaining life is longer in the order of the charging battery 2, the charging battery 3, and the charging battery 4.
  • the charging battery 2 with the longest remaining life reaches 15% and the charging battery 3 with the second longest remaining life Is switched by the switching means 8 so that the charging battery 4 having the shortest remaining life is used up to the remaining amount of 20% and the remaining amount of 25%.
  • the remaining life of each of the charging batteries 2 to 4 can be made more uniform.
  • the output voltage of the charging batteries 2 to 4 selected by the switching means 8 is detected by the first voltage detecting means 9, and the voltage of the operating battery 7 is detected by the second voltage detecting means 10. Then, the detection results of the first and second voltage detection means 9 and 10 are sent to the control means 13, and the converter 5 is suitable for charging the working battery 7 by the operation command from the control means 13. The voltage is converted and output to the operating battery 7. For example, when the voltage of the operating battery 7 is higher than that of the charging batteries 2 to 4, the converter 5 boosts the input voltage from the charging batteries 2 to 4 and outputs the boosted voltage to the operating battery 7 for operation. The battery 7 can be charged.
  • the converter 5 is controlled so that the remaining amount of the operating battery 7 becomes less than a predetermined value and the operating battery 7 is repeatedly charged and stopped by a predetermined amount. Then, if the repetitive charging is repeated as described above, the life of the working battery 7 is extended as compared with the case where the full charge is repeated from the discharge as shown in FIG.
  • the secondary battery system A is provided in an electric vehicle (electric vehicle) B such as an electric bus as shown in FIG.
  • the electric automobile B includes a base vehicle (driving vehicle) B1 and a battery vehicle (towing vehicle) B2. Further, an operating battery 7 is mounted on the base vehicle B1, and a plurality of charging batteries 2 to 4 are mounted on the battery vehicle B2.
  • the electric vehicle B of the present embodiment as shown in FIG. 3, only the operation battery 7 is mounted on the base vehicle B1, and the battery vehicle B2 provided with the charging batteries 2 to 4 is used as the base vehicle B1. Tow. For this reason, a small capacity battery vehicle can be used for the base vehicle B1. Further, the charging batteries 2 to 4 need only be mounted and stored in the battery vehicle B2, and an automatic warehouse or the like becomes unnecessary. Further, the batteries 2 to 4 can be easily replaced by detaching the battery vehicle B2 from the base vehicle B1 in the same manner as the trailer.
  • the charging batteries 2 to 4 and the operating battery 7 are prepared as the battery 1, and the converter 5 is connected to the plurality of charging batteries 2 to 4 connected in parallel.
  • the voltage is adjusted and output to the operating battery 7, the operating battery 7 is charged, and electric power is supplied from the operating battery 7 to the load 6 such as a motor. This makes it possible to equalize the lifetimes of the plurality of batteries (charging batteries) 2 to 4 connected in parallel.
  • any one of the charging batteries 2 to 4 can be selectively connected from the plurality of charging batteries 2 to 4 to the converter 5 by the switching means 8 according to the amount of charge of each of the charging batteries 2 to 4. .
  • the life of a plurality of batteries (charging batteries) 2 to 4 can be reliably ensured. It becomes possible to make uniform.
  • the operating battery 7 becomes less than a predetermined remaining battery level and is charged from the charging batteries 2 to 4 to the operating battery 7 by the converter 5, the operating battery 7 is not fully charged but is charged to the operating battery 7. It is charged repeatedly by a predetermined amount, and detailed charging is repeated. As a result, it is possible to extend the life of the operating battery 7 as compared with a case where full charge is repeated from discharge.
  • the voltage of the charging batteries 2 to 4 and the charging current of the operating battery 7 are detected, and the switching means 8 is switched based on the detected voltage, so that a plurality of charging batteries 2 to 4 can be reliably connected.
  • the service life can be made uniform.
  • the electric vehicle B of the present embodiment only the operation battery 7 is mounted on the base vehicle (driving vehicle) B1, and the battery vehicle (towing vehicle) B2 provided with the charging batteries 2 to 4 is the base vehicle B1. Tow. Thereby, it becomes possible to hold down the cost of vehicle development. Further, by replacing the battery vehicle B2 together, it becomes possible to replace the charging batteries 2 to 4 easily and efficiently in a short time. Furthermore, the battery vehicle B2 equipped with the charging batteries 2 to 4 can be used alone as a power source for disasters, event venues, construction, and the like.
  • the secondary battery system A may be configured without the switching means 8 as shown in FIG. In this case as well, it is possible to make the life of the plurality of charging batteries 2 to 4 uniform as in the present embodiment.
  • the present invention includes a plurality of charging batteries connected in parallel to each other, a converter that adjusts and outputs a voltage input from the charging battery, and an operation that is charged by the output of the converter and supplies power to a load.
  • the present invention relates to a secondary battery system including a battery for use. According to the present invention, the life of a plurality of batteries (charging batteries) connected in parallel can be made uniform.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Abstract

This secondary-battery system is provided with: a plurality of charging batteries (2, 3, and 4) connected to each other in parallel; a converter (5) that adjusts and outputs a voltage inputted from a charging battery (2, 3, or 4); and a working battery (7) that is charged by the output from the converter (5) and supplies power to a load (6).

Description

二次電池システム及び電動車両Secondary battery system and electric vehicle
　本発明は、二次電池システム及びこれを備えた電動車両に関する。
　本願は、２０１０年１２月３日に日本に出願された特願２０１０－２７０５１５号について優先権を主張し、その内容をここに援用する。 The present invention relates to a secondary battery system and an electric vehicle including the same.
This application claims priority on Japanese Patent Application No. 2010-270515 filed in Japan on December 3, 2010, the contents of which are incorporated herein by reference.
　電気自動車などの電動車両では、一般に、搭載される電池が大容量化された場合、図７に示すように電池１を並列接続して対応するようにしている（例えば、特許文献１参照）。 In an electric vehicle such as an electric vehicle, generally, when the capacity of a mounted battery is increased, the battery 1 is connected in parallel as shown in FIG. 7 (for example, refer to Patent Document 1).
特開平１１－３３２０２３号公報Japanese Patent Laid-Open No. 11-332023
　しかしながら、複数の電池を並列接続してなる電池システムにおいては、単純に並列接続したとしても、個々の電池の電力が均一に減少せず、各電池の寿命が不均一になってしまう。このため、電池交換式等、異なる履歴を有し、劣化度も異なる電池を並列接続して組み合わせた場合であっても、各電池の寿命を均一化することを可能にする手法が強く望まれている。 However, in a battery system in which a plurality of batteries are connected in parallel, even if they are simply connected in parallel, the power of each battery does not decrease uniformly, and the life of each battery becomes uneven. For this reason, even when batteries having different histories and different degrees of deterioration are combined in parallel, such as a battery exchange type, a method that can make the life of each battery uniform is strongly desired. ing.
　本発明の二次電池システムは、互いに並列に接続された複数の充電用電池と、前記充電用電池から入力された電圧を調整して出力するコンバータと、前記コンバータの出力によって充電され、負荷に電力を供給する作動用電池とを備える。 A secondary battery system according to the present invention includes a plurality of charging batteries connected in parallel to each other, a converter that adjusts and outputs a voltage input from the charging battery, and is charged by an output of the converter to a load. An operating battery for supplying electric power.
　この発明においては、充電用電池と作動用電池とを用意しておき、並列接続した複数の充電用電池からコンバータで電圧を調整して作動用電池に出力し、この作動用電池の充電を行い、作動用電池からモータ等の負荷に電力を供給する。これにより、並列接続した複数の電池（充電用電池）の寿命を均一化することが可能になる。 In the present invention, a charging battery and an operating battery are prepared, and a voltage is adjusted by a converter from a plurality of charging batteries connected in parallel and output to the operating battery, and the operating battery is charged. Power is supplied from the operating battery to a load such as a motor. Thereby, it becomes possible to equalize the lifetime of the some battery (charge battery) connected in parallel.
　また、本発明の二次電池システムにおいては、前記コンバータと前記充電用電池との間に、いずれかの前記充電用電池を選択的に前記コンバータに接続する切り替え手段を備えていてもよい。 In addition, in the secondary battery system of the present invention, switching means for selectively connecting any of the charging batteries to the converter may be provided between the converter and the charging battery.
　この発明においては、例えば各充電用電池の蓄電量に応じ、複数の充電用電池から選択的にいずれかの充電用電池を切り替え手段でコンバータに接続することができる。これにより、異なる履歴を有し、劣化度も異なる電池を充電用電池として並列接続して組み合わせた場合であっても、確実に複数の電池（充電用電池）の寿命を均一化することが可能になる。 In the present invention, for example, one of the charging batteries can be selectively connected to the converter by the switching means according to the charged amount of each charging battery. As a result, even when batteries with different histories and different degrees of deterioration are connected in parallel as charging batteries, the life of multiple batteries (charging batteries) can be made uniform evenly. become.
　さらに、本発明の二次電池システムにおいて、前記コンバータは、前記作動用電池の残量が所定以下になるとともに前記作動用電池に所定量ずつの充電と停止を繰り返してもよい。 Furthermore, in the secondary battery system of the present invention, the converter may repeatedly charge and stop the operating battery by a predetermined amount while the remaining amount of the operating battery becomes a predetermined level or less.
　この発明においては、作動用電池が予め規定した所定の残量以下になり、コンバータによって充電用電池から作動用電池に充電する際に、満充電するのではなく、作動用電池に所定量ずつ充電するようにして、細やかな充電を繰り返し行うようにする。これにより、放電から満充電を繰り返す場合と比較し、作動用電池の寿命を延ばすことが可能になる。 In this invention, when the operating battery becomes less than a predetermined predetermined remaining amount, when charging the operating battery from the charging battery to the operating battery by the converter, the operating battery is charged by a predetermined amount instead of being fully charged. Repeat the charging process. Thereby, it becomes possible to extend the life of the battery for operation compared with the case where full charge is repeated from discharge.
　また、本発明の二次電池システムにおいて、前記切り替え手段は、前記充電用電池の電圧及び／又は前記作動用電池の充電電流の検出値に基づいて切り替えを行ってもよい。 Further, in the secondary battery system of the present invention, the switching means may perform switching based on a detected value of a voltage of the charging battery and / or a charging current of the operating battery.
　この発明においては、充電用電池の電圧や作動用電池の充電電流を検出し、これに基づいて切り替え手段の切り替えを行う。これにより、確実に複数の充電用電池の寿命を均一化することが可能になる。 In this invention, the voltage of the charging battery and the charging current of the operating battery are detected, and the switching means is switched based on the detected voltage. Thereby, it becomes possible to make the lifetimes of a plurality of charging batteries uniform.
　本発明の電動車両は、上記のいずれかの二次電池システムを備える。 The electric vehicle of the present invention includes any one of the above secondary battery systems.
　この発明においては、上記のいずれかの二次電池システムの作用効果を電動車両に付与することができる。 In the present invention, the effect of any of the above secondary battery systems can be imparted to the electric vehicle.
　また、本発明の電動車両においては、前記作動用電池が設けられた駆動車両と、前記充電用電池が設けられ、前記駆動車両にけん引されるけん引車両とを備えていてもよい。 Further, the electric vehicle of the present invention may include a driving vehicle provided with the operating battery and a towing vehicle provided with the charging battery and towed by the driving vehicle.
　この発明においては、駆動車両に作動用電池のみが搭載され、充電用電池を設けたけん引車両を駆動車両でけん引するので、車両開発のコストを抑えることが可能になる。また、けん引車両ごと交換することで、容易に且つ短時間で効率的に充電用電池の交換を行うことが可能になる。さらに、充電用電池を搭載したけん引車両は、単体で災害時、イベント会場、工事などの電源として活用することも可能になる。 In the present invention, only the operating battery is mounted on the driving vehicle, and the towing vehicle provided with the charging battery is towed by the driving vehicle, so that the cost of vehicle development can be suppressed. Further, by replacing the entire towing vehicle, it is possible to easily and efficiently replace the charging battery in a short time. Furthermore, a towing vehicle equipped with a rechargeable battery can be used alone as a power source for disasters, event venues, and construction.
　本発明の二次電池システム及びこれを備えた電動車両においては、充電用電池と作動用電池とを用意しておき、並列接続した複数の充電用電池からコンバータで電圧を調整して作動用電池に出力して充電を行い、この作動用電池からモータ等の負荷に電力を供給する。これにより、並列接続した複数の電池（充電用電池）の寿命を均一化することが可能になる。 In the secondary battery system of the present invention and an electric vehicle equipped with the secondary battery system, the battery for operation and the battery for operation are prepared, and the battery for operation is prepared by adjusting the voltage with a converter from a plurality of batteries connected in parallel. To charge the battery and supply power from the operating battery to a load such as a motor. Thereby, it becomes possible to equalize the lifetime of the some battery (charge battery) connected in parallel.
本発明の一実施形態に係る二次電池システムを示す図である。It is a figure which shows the secondary battery system which concerns on one Embodiment of this invention. 本発明の一実施形態に係る二次電池システムにおける作動用電池の充電方法を示す図である。It is a figure which shows the charging method of the battery for an operation | movement in the secondary battery system which concerns on one Embodiment of this invention. 本発明の一実施形態に係る電動車両を示す図である。It is a figure showing an electric vehicle concerning one embodiment of the present invention. 従来の小容量タイプの電動車両を示す図である。It is a figure which shows the conventional small capacity type electric vehicle. 従来の大容量タイプの電動車両を示す図である。It is a figure which shows the conventional large capacity type electric vehicle. 本発明の一実施形態に係る二次電池システムの変形例を示す図である。It is a figure which shows the modification of the secondary battery system which concerns on one Embodiment of this invention. 従来の二次電池システムを示す図である。It is a figure which shows the conventional secondary battery system.
　以下、図１から図６を参照し、本発明の一実施形態に係る二次電池システム及びこれを備えた電動車両について説明する。 Hereinafter, a secondary battery system and an electric vehicle including the same according to an embodiment of the present invention will be described with reference to FIGS. 1 to 6.
　本実施形態の二次電池システムＡは、図１に示すように、複数の充電用電池２、３、４と、コンバータ（ＤＣ－ＤＣコンバータ）５と、作動用電池７とを備えている。複数の充電用電池２、３、４は互いに並列に接続されている。コンバータ５は、充電用電池２～４から入力された電圧を調整して出力する。作動用電池７は、コンバータ５の出力によって充電され、モータ等の負荷６に電力を供給する。本実施形態では、複数の充電用電池２～４、および作動用電池７の各電力量は、例えば１５ｋＷｈである。 The secondary battery system A of the present embodiment includes a plurality of charging batteries 2, 3, 4, a converter (DC-DC converter) 5, and an operating battery 7, as shown in FIG. The plurality of charging batteries 2, 3, 4 are connected in parallel to each other. Converter 5 adjusts and outputs the voltage input from charging batteries 2-4. The operating battery 7 is charged by the output of the converter 5 and supplies power to a load 6 such as a motor. In the present embodiment, the amount of power of each of the plurality of charging batteries 2 to 4 and the operating battery 7 is, for example, 15 kWh.
　さらに、本実施形態の二次電池システムＡにおいては、コンバータ５と充電用電池２～４との間に、いずれかの充電用電池２～４を選択的にコンバータ５に接続する切り替え手段（電池切替部）８を備えている。 Further, in the secondary battery system A of the present embodiment, switching means (battery) for selectively connecting any of the charging batteries 2 to 4 to the converter 5 between the converter 5 and the charging batteries 2 to 4. A switching unit) 8.
　また、この二次電池システムＡは、充電用電池２～４の電圧を検出する第１電圧検出手段９と、作動用電池７の電圧を検出する第２電圧検出手段１０と、作動用電池７の充電電流を検出する電流検出手段１１と、充電器機能部１２を備えている。充電器機能部１２は、コンバータ５と、第１電圧検出手段９と、第２電圧検出手段１０と、電流検出手段１１とを含んでいる。 The secondary battery system A includes a first voltage detecting means 9 for detecting the voltages of the charging batteries 2 to 4, a second voltage detecting means 10 for detecting the voltage of the operating battery 7, and the operating battery 7. Current detecting means 11 for detecting the charging current and a charger function unit 12. The charger function unit 12 includes a converter 5, first voltage detection means 9, second voltage detection means 10, and current detection means 11.
　また、この二次電池システムＡにおいては、第１電圧検出手段９と第２電圧検出手段１０と電流検出手段１１による検出値が制御手段１３に送られる。制御手段１３は、充電用電池２～４の電圧及び／又は作動用電池７の充電電流の検出値に基づいて切り替え手段８とコンバータ５を制御する。 Further, in the secondary battery system A, detection values by the first voltage detection means 9, the second voltage detection means 10 and the current detection means 11 are sent to the control means 13. The control means 13 controls the switching means 8 and the converter 5 based on the voltage values of the charging batteries 2 to 4 and / or the detected value of the charging current of the operating battery 7.
　上記のように構成された本実施形態の二次電池システムＡにおいては、電池１として充電用電池２～４と作動用電池７とを用意しておき、並列接続した複数の充電用電池２～４からコンバータ５で電圧を調整して作動用電池７に出力し、この作動用電池７の充電を行う。そして、従来のように並列接続した複数の電池１からモータ等の負荷６に電力を供給するのではなく、作動用電池７から負荷６に電力を供給する。 In the secondary battery system A of the present embodiment configured as described above, charging batteries 2 to 4 and an operating battery 7 are prepared as the battery 1, and a plurality of charging batteries 2 to 2 connected in parallel are prepared. The voltage is adjusted from 4 to the converter 5 and output to the operating battery 7, and the operating battery 7 is charged. Then, power is not supplied from the plurality of batteries 1 connected in parallel to the load 6 such as a motor as in the prior art, but power is supplied from the operating battery 7 to the load 6.
　また、このとき、各充電用電池２～４の蓄電量に応じ、複数の充電用電池２～４から選択的にいずれかの充電用電池２～４を切り替え手段８でコンバータ５に接続する。また、例えば３つの充電用電池２～４を並列接続して設けた場合、これらの充電用電池２～４は、全ての充電用電池２～４を規定下限の蓄電量まで使った後に充電するわけではなく、切り替え手段８によって各充電用電池２～４の蓄電量に応じて順次充電用電池２～４をコンバータ５に接続し、早ければ２つ目の充電用電池３を使用している途中、遅くとも３つ目の充電用電池４を使用している途中で充電を行う。そして、電池２～４の繰り返し使用寿命は、消費電力量が大きいほどに短くなるため、このように切り替え手段８で充電用電池２～４を選択的に使用することで、各充電用電池２～４の余寿命の均一化が図れる。 Further, at this time, any one of the charging batteries 2 to 4 is selectively connected to the converter 5 by the switching means 8 from the plurality of charging batteries 2 to 4 according to the charged amount of each of the charging batteries 2 to 4. For example, when three charging batteries 2 to 4 are provided in parallel connection, these charging batteries 2 to 4 are charged after all the charging batteries 2 to 4 have been used up to a specified lower limit storage amount. Instead, the switching means 8 sequentially connects the charging batteries 2 to 4 to the converter 5 according to the amount of charge of each charging battery 2 to 4, and uses the second charging battery 3 at the earliest. Charging is performed in the middle of using the third charging battery 4 at the latest. Since the repeated use life of the batteries 2 to 4 becomes shorter as the power consumption increases, the charging batteries 2 to 4 are selectively used by the switching means 8 in this way, whereby each charging battery 2 The remaining life of ~ 4 can be made uniform.
　さらに、各充電用電池２～４の残蓄電量（残量）を合わせた全蓄電量を一定として、履歴の異なる充電用電池２～４を組み合わせる場合には、余寿命の長い充電用電池２の切替残量を小さくとる。すなわち、例えば、３つの充電用電池２～４があり、充電用電池２、充電用電池３、充電用電池４の順に余寿命が長いとする。３つの充電用電池２～４の平均切替残量を満充電の２０％に設定すると、余寿命が最も長い充電用電池２は残量１５％まで、２番目に余寿命が長い充電用電池３は残量２０％まで、余寿命が最も短い充電用電池４は残量２５％まで使うように、切り替え手段８によって切り替えを行う。これにより、より確実に各充電用電池２～４の余寿命の均一化が図れる。 Further, when charging batteries 2 to 4 having different histories are combined with the total amount of stored power (the remaining amount) of each charging battery 2 to 4 being constant, the charging battery 2 having a long remaining life is combined. Reduce the remaining amount of switching. That is, for example, it is assumed that there are three charging batteries 2 to 4 and the remaining life is longer in the order of the charging battery 2, the charging battery 3, and the charging battery 4. When the average remaining charge of the three charging batteries 2 to 4 is set to 20% of the full charge, the charging battery 2 with the longest remaining life reaches 15% and the charging battery 3 with the second longest remaining life Is switched by the switching means 8 so that the charging battery 4 having the shortest remaining life is used up to the remaining amount of 20% and the remaining amount of 25%. As a result, the remaining life of each of the charging batteries 2 to 4 can be made more uniform.
　次に、切り替え手段８で選択した充電用電池２～４の出力電圧が第１電圧検出手段９によって検出され、作動用電池７の電圧が第２電圧検出手段１０によって検出されている。
そして、これら第１及び第２電圧検出手段９、１０の検出結果が制御手段１３に送られ、この制御手段１３からの動作指令によって、コンバータ５が、作動用電池７を充電するために適した電圧に変換して作動用電池７に出力する。例えば充電用電池２～４よりも作動用電池７の電圧が高くなっている場合に、コンバータ５が充電用電池２～４からの入力電圧を昇圧して作動用電池７に出力し、作動用電池７に充電できるようにする。 Next, the output voltage of the charging batteries 2 to 4 selected by the switching means 8 is detected by the first voltage detecting means 9, and the voltage of the operating battery 7 is detected by the second voltage detecting means 10.
Then, the detection results of the first and second voltage detection means 9 and 10 are sent to the control means 13, and the converter 5 is suitable for charging the working battery 7 by the operation command from the control means 13. The voltage is converted and output to the operating battery 7. For example, when the voltage of the operating battery 7 is higher than that of the charging batteries 2 to 4, the converter 5 boosts the input voltage from the charging batteries 2 to 4 and outputs the boosted voltage to the operating battery 7 for operation. The battery 7 can be charged.
　また、このとき、コンバータ５は、図２（ａ）に示すように、作動用電池７の残量が所定以下になるとともに作動用電池７に所定量ずつの充電と停止を繰り返すように制御される。そして、このように細やかな充電を繰り返し行うようにすると、図２（ｂ）に示すように放電から満充電を繰り返す場合と比較し、作動用電池７の寿命が延びる。 At this time, as shown in FIG. 2A, the converter 5 is controlled so that the remaining amount of the operating battery 7 becomes less than a predetermined value and the operating battery 7 is repeatedly charged and stopped by a predetermined amount. The Then, if the repetitive charging is repeated as described above, the life of the working battery 7 is extended as compared with the case where the full charge is repeated from the discharge as shown in FIG.
　一方、本実施形態において、上記の二次電池システムＡは、図３に示すように、電動バスなどの電気自動車（電動車両）Ｂに具備されている。また、本実施形態では、電動自動車Ｂがベース車両（駆動車両）Ｂ１と電池車両（けん引車両）Ｂ２とを備えている。さらに、ベース車両Ｂ１に作動用電池７が搭載され、電池車両Ｂ２に複数の充電用電池２～４が搭載されている。 On the other hand, in the present embodiment, the secondary battery system A is provided in an electric vehicle (electric vehicle) B such as an electric bus as shown in FIG. In the present embodiment, the electric automobile B includes a base vehicle (driving vehicle) B1 and a battery vehicle (towing vehicle) B2. Further, an operating battery 7 is mounted on the base vehicle B1, and a plurality of charging batteries 2 to 4 are mounted on the battery vehicle B2.
　ここで、従来、電池交換式の電気自動車においては、図４に示す小容量電池車両タイプと、図５に示す大容量電池車両タイプの２種類がある。そして、大容量電池車両においては、補充用電池を自動倉庫に確保しておき、電池交換装置によって大容量電池車両の電池と適宜交換しながら運用することが必要で、多大なインフラ設備が必要になる。 Here, conventionally, there are two types of battery-exchangeable electric vehicles: a small-capacity battery vehicle type shown in FIG. 4 and a large-capacity battery vehicle type shown in FIG. In a large-capacity battery vehicle, it is necessary to secure a supplementary battery in an automatic warehouse and operate it while appropriately replacing the battery of the large-capacity battery vehicle with a battery exchange device, which requires a lot of infrastructure facilities. Become.
　これに対し、本実施形態の電気自動車Ｂにおいては、図３に示すように、ベース車両Ｂ１に作動用電池７のみが搭載され、充電用電池２～４を設けた電池車両Ｂ２をベース車両Ｂ１でけん引する。このため、ベース車両Ｂ１に小容量電池車両を用いることができる。また、充電用電池２～４を電池車両Ｂ２に搭載して保管すればよく、自動倉庫などが不要になる。さらに、ベース車両Ｂ１に電池車両Ｂ２をトレーラと同様に脱着することで、電池２～４の交換が容易に行える。 On the other hand, in the electric vehicle B of the present embodiment, as shown in FIG. 3, only the operation battery 7 is mounted on the base vehicle B1, and the battery vehicle B2 provided with the charging batteries 2 to 4 is used as the base vehicle B1. Tow. For this reason, a small capacity battery vehicle can be used for the base vehicle B1. Further, the charging batteries 2 to 4 need only be mounted and stored in the battery vehicle B2, and an automatic warehouse or the like becomes unnecessary. Further, the batteries 2 to 4 can be easily replaced by detaching the battery vehicle B2 from the base vehicle B1 in the same manner as the trailer.
　したがって、本実施形態の二次電池システムＡにおいては、電池１として充電用電池２～４と作動用電池７とを用意しておき、並列接続した複数の充電用電池２～４からコンバータ５で電圧を調整して作動用電池７に出力し、この作動用電池７の充電を行い、作動用電池７からモータ等の負荷６に電力を供給する。これにより、並列接続した複数の電池（充電用電池）２～４の寿命を均一化することが可能になる。 Therefore, in the secondary battery system A of the present embodiment, the charging batteries 2 to 4 and the operating battery 7 are prepared as the battery 1, and the converter 5 is connected to the plurality of charging batteries 2 to 4 connected in parallel. The voltage is adjusted and output to the operating battery 7, the operating battery 7 is charged, and electric power is supplied from the operating battery 7 to the load 6 such as a motor. This makes it possible to equalize the lifetimes of the plurality of batteries (charging batteries) 2 to 4 connected in parallel.
　また、例えば各充電用電池２～４の蓄電量に応じ、複数の充電用電池２～４から選択的にいずれかの充電用電池２～４を切り替え手段８でコンバータ５に接続することができる。これにより、異なる履歴を有し、劣化度も異なる電池を充電用電池２～４として並列接続して組み合わせた場合であっても、確実に複数の電池（充電用電池）２～４の寿命を均一化することが可能になる。 Further, for example, any one of the charging batteries 2 to 4 can be selectively connected from the plurality of charging batteries 2 to 4 to the converter 5 by the switching means 8 according to the amount of charge of each of the charging batteries 2 to 4. . As a result, even when batteries having different histories and different degrees of deterioration are connected in parallel as charging batteries 2 to 4, the life of a plurality of batteries (charging batteries) 2 to 4 can be reliably ensured. It becomes possible to make uniform.
　さらに、作動用電池７が予め規定した所定の残量以下になり、コンバータ５によって充電用電池２～４から作動用電池７に充電する際に、満充電するのではなく、作動用電池７に所定量ずつ充電するようにして、細やかな充電を繰り返し行うようにする。これにより、放電から満充電を繰り返す場合と比較し、作動用電池７の寿命を延ばすことが可能になる。 Further, when the operating battery 7 becomes less than a predetermined remaining battery level and is charged from the charging batteries 2 to 4 to the operating battery 7 by the converter 5, the operating battery 7 is not fully charged but is charged to the operating battery 7. It is charged repeatedly by a predetermined amount, and detailed charging is repeated. As a result, it is possible to extend the life of the operating battery 7 as compared with a case where full charge is repeated from discharge.
　また、充電用電池２～４の電圧や作動用電池７の充電電流を検出し、これに基づいて切り替え手段８の切り替えを行うようにすることで、確実に複数の充電用電池２～４の寿命を均一化することが可能になる。 Further, the voltage of the charging batteries 2 to 4 and the charging current of the operating battery 7 are detected, and the switching means 8 is switched based on the detected voltage, so that a plurality of charging batteries 2 to 4 can be reliably connected. The service life can be made uniform.
　さらに、本実施形態の電動車両Ｂにおいては、ベース車両（駆動車両）Ｂ１に作動用電池７のみが搭載され、充電用電池２～４を設けた電池車両（けん引車両）Ｂ２をベース車両Ｂ１でけん引する。これにより、車両開発のコストを抑えることが可能になる。また、電池車両Ｂ２ごと交換することで、容易に且つ短時間で効率的に充電用電池２～４の交換を行うことが可能になる。さらに、充電用電池２～４を搭載した電池車両Ｂ２は、単体で災害時、イベント会場、工事などの電源として活用することも可能になる。 Further, in the electric vehicle B of the present embodiment, only the operation battery 7 is mounted on the base vehicle (driving vehicle) B1, and the battery vehicle (towing vehicle) B2 provided with the charging batteries 2 to 4 is the base vehicle B1. Tow. Thereby, it becomes possible to hold down the cost of vehicle development. Further, by replacing the battery vehicle B2 together, it becomes possible to replace the charging batteries 2 to 4 easily and efficiently in a short time. Furthermore, the battery vehicle B2 equipped with the charging batteries 2 to 4 can be used alone as a power source for disasters, event venues, construction, and the like.
　以上、本発明に係る二次電池システム及びこれを備えた電動車両の一実施形態について説明したが、本発明は上記の一実施形態に限定されるものではなく、その趣旨を逸脱しない範囲で適宜変更可能である。 In the above, one embodiment of the secondary battery system according to the present invention and an electric vehicle equipped with the secondary battery system has been described. However, the present invention is not limited to the above-described one embodiment, and may be appropriately selected without departing from the scope of the present invention. It can be changed.
　例えば、履歴が同じ複数の充電用電池２～４を使用する場合には、図６に示すように切り替え手段８を備えずに二次電池システムＡを構成してもよい。そして、この場合においても、本実施形態と同様に複数の充電用電池２～４の寿命を均一化することが可能である。 For example, when a plurality of charging batteries 2 to 4 having the same history are used, the secondary battery system A may be configured without the switching means 8 as shown in FIG. In this case as well, it is possible to make the life of the plurality of charging batteries 2 to 4 uniform as in the present embodiment.
　本発明は、互いに並列に接続された複数の充電用電池と、前記充電用電池から入力された電圧を調整して出力するコンバータと、前記コンバータの出力によって充電され、負荷に電力を供給する作動用電池とを備える二次電池システムに関する。本発明によれば、並列接続した複数の電池（充電用電池）の寿命を均一化することができる。 The present invention includes a plurality of charging batteries connected in parallel to each other, a converter that adjusts and outputs a voltage input from the charging battery, and an operation that is charged by the output of the converter and supplies power to a load. The present invention relates to a secondary battery system including a battery for use. According to the present invention, the life of a plurality of batteries (charging batteries) connected in parallel can be made uniform.
１　電池、
２、３、４　充電用電池、
５　コンバータ、
６　負荷、
７　作動用電池、
８　切り替え手段（電池切替部）、
９　第１電圧検出手段、
１０　第２電圧検出手段、
１１　電流検出手段、
１２　充電器機能部、
１３　制御手段、
Ａ　二次電池システム、
Ｂ　電気自動車（電動車両）、
Ｂ１　ベース車両（駆動車両）、
Ｂ２　電池車両（けん引車両） 1 battery,
2, 3, 4 rechargeable batteries,
5 Converter,
6 load,
7 Battery for operation,
8 switching means (battery switching unit),
9 First voltage detection means,
10 second voltage detection means,
11 Current detection means,
12 Battery charger functional part,
13 control means,
A secondary battery system,
B Electric vehicle (electric vehicle),
B1 base vehicle (drive vehicle),
B2 Battery vehicle (towing vehicle)

Claims (6)

  1. 　互いに並列に接続された複数の充電用電池と、
    　前記充電用電池から入力された電圧を調整して出力するコンバータと、
    　前記コンバータの出力によって充電され、負荷に電力を供給する作動用電池とを備える二次電池システム。     A plurality of charging batteries connected in parallel to each other;
    A converter that adjusts and outputs a voltage input from the charging battery;
    A secondary battery system comprising: an operating battery that is charged by an output of the converter and supplies power to a load.
  2. 　請求項１に記載の二次電池システムにおいて、
    　前記コンバータと前記充電用電池との間に、いずれかの前記充電用電池を選択的に前記コンバータに接続する切り替え手段を備える二次電池システム。     The secondary battery system according to claim 1,
    A secondary battery system comprising switching means for selectively connecting any one of the charging batteries to the converter between the converter and the charging battery.
  3. 　請求項１または請求項２に記載の二次電池システムにおいて、
    　前記コンバータは、前記作動用電池の残量が所定以下になるとともに前記作動用電池に所定量ずつの充電と停止を繰り返す二次電池システム。     The secondary battery system according to claim 1 or 2,
    The converter is a secondary battery system that repeats charging and stopping of the operating battery by a predetermined amount while the remaining amount of the operating battery becomes equal to or lower than a predetermined level.
  4. 　請求項２または請求項３に記載の二次電池システムにおいて、
    　前記切り替え手段は、前記充電用電池の電圧及び／又は前記作動用電池の充電電流の検出値に基づいて切り替えを行う二次電池システム。     The secondary battery system according to claim 2 or claim 3,
    The switching means is a secondary battery system that performs switching based on a detected value of a voltage of the charging battery and / or a charging current of the operating battery.
  5. 　請求項１から請求項４のいずれか一項に記載の二次電池システムを備える電動車両。 An electric vehicle comprising the secondary battery system according to any one of claims 1 to 4.
  6. 　請求項５に記載の電動車両において、
    　前記作動用電池が設けられた駆動車両と、前記充電用電池が設けられ、前記駆動車両にけん引されるけん引車両とを備える電動車両。     The electric vehicle according to claim 5,
    An electric vehicle comprising: a driving vehicle provided with the operating battery; and a towing vehicle provided with the charging battery and towed by the driving vehicle.
PCT/JP2011/077919 2010-12-03 2011-12-02 Secondary-battery system and electric vehicle WO2012074094A1 (en)

Applications Claiming Priority (2)

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JP2010270515A JP2012120403A (en) 2010-12-03 2010-12-03 Secondary battery system and electric vehicle

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