JP2011200012A - Secondary battery charging/discharging system and mobile apparatus provided with the same - Google Patents

Secondary battery charging/discharging system and mobile apparatus provided with the same Download PDF

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Publication number
JP2011200012A
JP2011200012A JP2010063652A JP2010063652A JP2011200012A JP 2011200012 A JP2011200012 A JP 2011200012A JP 2010063652 A JP2010063652 A JP 2010063652A JP 2010063652 A JP2010063652 A JP 2010063652A JP 2011200012 A JP2011200012 A JP 2011200012A
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Japan
Prior art keywords
power
secondary battery
power source
charged
converter
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Pending
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JP2010063652A
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Japanese (ja)
Inventor
Hidehiko Sugimoto
英彦 杉本
Original Assignee
Tabuchi Electric Co Ltd
田淵電機株式会社
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Application filed by Tabuchi Electric Co Ltd, 田淵電機株式会社 filed Critical Tabuchi Electric Co Ltd
Priority to JP2010063652A priority Critical patent/JP2011200012A/en
Publication of JP2011200012A publication Critical patent/JP2011200012A/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage for electromobility
    • Y02T10/7005Batteries
    • Y02T10/7011Lithium ion battery
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage for electromobility
    • Y02T10/7005Batteries
    • Y02T10/7016Lead acid battery

Abstract

PROBLEM TO BE SOLVED: To economically charge a secondary battery provided to an electric vehicle or a plug-in hybrid vehicle, or the like, and to economically use a surplus charging power.SOLUTION: The secondary battery charging/discharging system includes a bidirectional power converter 8, provided between a commercial power supply 1 and a secondary battery 11, and a control device 9 uses the commercial power supply to perform charge control of the secondary battery 11 during a night power time zone, when a low power rate is provided; and when a vehicle 10 stays at a garage or the like and has a surplus charging power of the secondary battery 11, the surplus power of the secondary battery 11 is designed to be used by a load.

Description

  The present invention relates to a system for charging / discharging a secondary battery mounted on a moving body and the moving body.

  In Patent Document 1, it is expected that an electric vehicle as a moving body will be widely used in various offices and homes. As a battery as a power source of such an electric vehicle, a lithium ion battery, a nickel metal hydride battery, or the like is used. It is disclosed that secondary batteries such as batteries and lead batteries are usually used.

  Furthermore, in Patent Document 1, a secondary battery such as a lithium ion battery is light, has a high capacity, and has a high output. It is disclosed that the charging operation of the secondary battery of the vehicle is usually performed in the late-night power hours where the unit price is low.

JP 2009-254221 A

  By the way, the charging power amount of the secondary battery described above is several tens of kWh to several tens of kWh, but it is expected that the electric vehicle may not use up all of the power charged in the secondary battery. Is done.

  On the other hand, the amount of electric power used per day at home load is about 10 kWh, which is less than the amount of electric power charged in the secondary battery.

  As a problem to be solved by the present invention, in a moving body such as an electric vehicle equipped with the secondary battery as a power source, the stored power of the secondary battery can be effectively used, for example, in a household load. Yes.

  The charging / discharging system according to the present invention controls charging from a power source via a bidirectional power converter to a secondary battery mounted as a power source on a moving body, and when surplus power is charged, The surplus power can be controlled to be discharged to the load via the bidirectional power converter.

  The moving body can include a vehicle. The vehicle may be a vehicle that uses electric energy from a battery for all or a part of its power source. For example, an electric vehicle, a hybrid vehicle, a plug-in hybrid vehicle, a hybrid railway vehicle, a forklift, an electric wheelchair , Electric assist bicycles and electric scooters.

  The power source may be a commercial power source or a DC power source obtained by converting the commercial power source into a direct current. The power source may be a commercial power source to which a distributed power source such as a solar power generator or a wind power generator is connected.

  If the power source is a commercial power source, the secondary battery may be charged from the commercial power source during the night power hours when power is provided at low cost from the commercial power source. Further, it may be a direct current section in a distributed power source such as a solar power generation device or a fuel cell.

  When the power source is a direct current, a bidirectional power converter is interposed between the power source and the secondary battery, and when charging the secondary battery, charge control is performed on the secondary battery by the power converter, When discharging from the secondary battery, the power converted from the DC power of the secondary battery by the power converter may be supplied to the load as DC or converted to AC.

  A moving body such as an electric vehicle according to the present invention is a moving body such as an electric vehicle on which a secondary battery is mounted as a power source or a part thereof, and the moving body converts AC power of the power source into DC power. The secondary battery is charged while the DC power stored in the secondary battery is converted into AC power or converted into another DC power, or any DC power is converted into another DC power. When the secondary battery is controlled to be charged from the power source through the bidirectional power converter by converting to DC power and the secondary battery is charged with surplus power, the surplus power And a control device that controls discharge to a load via the bidirectional power converter.

  The moving body may be a vehicle that uses electric energy from a battery for all or a part of its power source, such as an electric vehicle, a hybrid vehicle, a plug-in hybrid vehicle, a hybrid railway vehicle, a forklift, an electric wheelchair. , Electric assist bicycles and electric scooters.

  According to the system of the present invention, if the moving body is an automobile such as an electric vehicle or a plug-in hybrid vehicle using a secondary battery as a power source, for example, the secondary battery is charged from the power source, while these vehicles are stored in the garage. When the secondary battery is charged with excess power, the charging power of the secondary battery can be used, for example, by discharging it to a household load, which is an extremely economical system.

FIG. 1 is a diagram showing a configuration of a charge / discharge system for a secondary battery according to an embodiment of the present invention. FIG. 2 is a diagram showing a configuration of a charge / discharge system for a secondary battery according to an embodiment of the present invention.

  Hereinafter, a charging / discharging system for a secondary battery mounted on a moving body such as an automobile according to an embodiment of the present invention will be described with reference to the accompanying drawings.

  The charge / discharge system according to the present embodiment will be described with reference to FIG. In FIG. 1, 1 is an AC power source such as a commercial power source, 2 is a power converter, 3 is a DC load, 4 is an AC load, 5 is a control device, 6 is a bidirectional power converter, and 7 is a pair of charge and discharge. A charge / discharge connection device (outlet / plug device) including terminals (outlet, plug) 7a, 7b. 8 is an automobile such as an electric vehicle using a secondary battery as a whole or a part of the power source, 9 is a secondary battery mounted on the automobile 8, 10 is an automobile 8 mounted and the power storage state of the secondary battery 9 is It is a battery information part. The DC load 3 and the AC load 4 are loads at homes, offices and others. As the bidirectional power converter 6, a well-known one can be used, and in particular, the description of the configuration is omitted.

  The charging / discharging connection mode in the charging / discharging connection device 7 is not particularly limited. In the embodiment, for the sake of explanation, the charging / discharging connection device 7 is constituted by a pair of charging / discharging terminals 7a and 7b and is connected by a user operation. ing.

(Charging mode for secondary battery 9)
When charging / discharging the secondary battery 9, the user connects both terminals 7a, 7b of the charge / discharge connection device 7.

  The user operates a charging button (not shown) of the control device 5 to cause the control device 5 to perform charge / discharge control. Further, when the user charges the secondary battery 9 using the power of the commercial power source 1, the power is provided from the commercial power source 1 at a low cost during the night power hours, so that the control device 5 is charged by the user. Control is performed so that the secondary battery 9 is charged when the night power time period is reached by timer control after the button is operated.

  Of course, such control may be set and selected by the user.

  This is because, for example, there is a case where it is desired to charge the secondary battery 9 and use the automobile 8 as soon as possible outside the night power hours.

  In the case where the control device 5 is set to control such that the power of the commercial power supply 1 is charged in the night power hours, the information from the battery information unit 10 is taken in when the night power hours are reached.

  The control device 5 controls the power converter 6 when it is determined that charging of the secondary battery 9 is reduced and charging is necessary based on the captured battery information, and the commercial power source 1 is controlled by the power converter 6. The AC power is converted into DC power, and the converted DC power is charged in the secondary battery 9.

  In addition, it is good also as control made to charge by user operation also in time slots other than a night electric power time slot | zone.

(Discharge mode from secondary battery 9)
As a case where electric power is discharged from the secondary battery 9 and the electric power is used, there is a state where the automobile 8 is not used by being housed in a garage or the like. The control device 5 is configured so that the user can operate a discharge button (not shown) in the control device 5 while the both connection terminals 7a and 7b of the charge / discharge connection portion 7 are connected. If there is a control input for use, the information from the battery information unit 10 is captured.

  If the control device 5 determines from the battery information that excessive power is stored in the secondary battery 9, the control device 5 automatically controls the power converter 6 to change the charging power of the secondary battery 9 to AC. The power is converted into electric power, and the converted AC power is supplied to the DC load 3 via the AC load 4 and the power converter 2.

  Further, in this case, when the control device 5 makes the above determination, the control device 5 displays the fact on a display device or the like to inform the user, waits for a control input from the user who confirmed the display, and turns the power converter 6 on. You may make it control.

  From the above, in this embodiment, when the accumulation of power in the secondary battery 9 is reduced, the secondary battery 9 can be charged with power preferably during the nighttime power hours, while the secondary battery 9 When surplus power is stored in 9, the surplus stored power can be used by the DC load 3 or the AC load 4.

  Further, in the embodiment, the automobile is an automobile such as an electric vehicle or a plug-in hybrid vehicle, and the secondary battery mounted on the automobile is charged with power, while the automobile is in a garage or the like and is secondary. When there is surplus power in the battery, the charging power of the secondary battery can be discharged and used for an AC load or a DC load that is a load consumed in the home. Note that the mounting of the secondary battery is not limited to an automobile, and any mobile body may be used.

  From the above, in the present embodiment, if the moving body is an automobile such as an electric vehicle or a plug-in hybrid vehicle, the secondary battery mounted on these vehicles is charged with power, while these vehicles enter the garage or the like. When the vehicle is stopped and there is surplus power in the secondary battery, the charging power of the secondary battery can be discharged to the household consumption load and used.

  It is a figure which shows the structure of the charging / discharging system of the secondary battery which concerns on embodiment of this invention with reference to FIG. In FIG. 2, in addition to the secondary battery 9 and the battery information unit 10, the bidirectional power converter 6 and the control device 5 are mounted on the automobile 8. Further, the distributed power supply device 12 is connected to the commercial power supply 1 via the power converter 11. The distributed power supply device 12 includes a solar cell 13 and a DC / DC converter 14. The power converter 11 in this case only needs to be capable of converting the DC power of the distributed power supply device 12 into AC power. Further, the distributed power supply device 12 is not limited to a solar battery. Further, the power of the distributed power supply device 12 may be converted by the power converter 2 instead of the power converter 11. In this case, the power converter 11 can be omitted and the power converter 2 is configured by a bidirectional power converter. Note that the distributed power supply device 12 including the power converter 11 can be a distributed power supply device, and the form thereof is not limited to the illustration.

  In the system of the present embodiment, the secondary battery 9 can be charged with the electric power from the commercial power source 1 or the distributed power supply device 12 and, unlike the first embodiment, the vehicle 8 is bidirectional. Since the directional power converter 6 and the control device 5 are mounted and the plug 7b of the charge / discharge connection device 7 is connected to the bidirectional power converter 6 via the cable 7c on the automobile 8 side, the charge / discharge connection is made. The secondary battery 9 can be charged / discharged by connecting the plug 7b of the device 7 to the outlet 7a and controlling the control device 5.

  As a result, in the present embodiment, a large-scale charging facility for the secondary battery 9 is not required outside the automobile 8, and the automobile 8 can be commercialized by simply connecting the plug 7b to the outlet 7a of the external charging / discharging connection device 7. The secondary battery 9 can be charged from the power source 1, and charging of the secondary battery 9 of the automobile 8 becomes more convenient.

DESCRIPTION OF SYMBOLS 1 Commercial power supply 2 Power converter 3 DC load 4 AC load 5 Control apparatus 6 Bidirectional power converter 7 Charging / discharging connection apparatus (outlet 7a, plug 7b)
8 Automobile 9 Secondary battery 10 Battery information unit 12 Distributed power supply

Claims (6)

  1.   The secondary battery mounted as a power source on the moving body is charged from the power source via the bidirectional power converter, and when the surplus power is charged, the surplus power is converted to the bidirectional power. A charge / discharge system for a secondary battery, characterized in that discharge control can be performed on a load via a converter.
  2.   The system according to claim 1, wherein the moving body is a vehicle using a secondary battery as a power source.
  3.   The system according to claim 1, wherein the power source is a commercial power source or a DC power source obtained by converting AC power of the commercial power source into DC power.
  4.   The system according to claim 1, wherein the power source is a commercial power source to which a distributed power supply device is connected.
  5. The power source is a commercial power source,
    The system according to claim 1, wherein the secondary battery is charged in a nighttime power period in which power is supplied from the commercial power source at a low cost.
  6. A moving body such as an electric vehicle equipped with a secondary battery as a power source or a part thereof,
    The moving body is
    A bidirectional power converter that converts AC power of a power source into DC power and charges the secondary battery, while converting DC power stored in the secondary battery into AC power;
    The secondary battery is charged from the power source via the bidirectional power converter, and when the secondary battery is charged with surplus power, the surplus power is converted to the bidirectional power. A control device for controlling discharge to a load via a converter;
    A mobile object characterized by that.
JP2010063652A 2010-03-19 2010-03-19 Secondary battery charging/discharging system and mobile apparatus provided with the same Pending JP2011200012A (en)

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JP2010063652A JP2011200012A (en) 2010-03-19 2010-03-19 Secondary battery charging/discharging system and mobile apparatus provided with the same

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013090462A (en) * 2011-10-19 2013-05-13 Mitsubishi Motors Corp Power feed control device for power supply device
JP2013198282A (en) * 2012-03-19 2013-09-30 Honda Motor Co Ltd Fuel cell system
CN103490485A (en) * 2012-06-12 2014-01-01 现代摩比斯株式会社 Apparatus for bidirectional electric power supply between electric vehicle and smart grid and method of bidirectionally supplying electric power employing the same
JP2014027854A (en) * 2012-07-30 2014-02-06 Mitsubishi Electric Corp Charge/discharge device
JP2014042454A (en) * 2012-05-25 2014-03-06 Panasonic Corp On-vehicle power supply apparatus and photovoltaic apparatus
WO2014156030A1 (en) * 2013-03-27 2014-10-02 パナソニック株式会社 Vehicle power unit
WO2014174762A1 (en) * 2013-04-24 2014-10-30 パナソニックIpマネジメント株式会社 Power conversion system and connector
JP2015092818A (en) * 2014-12-04 2015-05-14 三菱電機株式会社 Charging/discharging device

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JPH1118317A (en) * 1997-06-24 1999-01-22 Misawa Homes Co Ltd Housing equipped with solar light generation facility
JP2001008380A (en) * 1999-06-17 2001-01-12 Nissan Motor Co Ltd Power management system
JP2002315193A (en) * 2001-04-10 2002-10-25 Mitsubishi Heavy Ind Ltd Power control system
JP2007534281A (en) * 2003-07-09 2007-11-22 アロイス・ヴォベン Car

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1118317A (en) * 1997-06-24 1999-01-22 Misawa Homes Co Ltd Housing equipped with solar light generation facility
JP2001008380A (en) * 1999-06-17 2001-01-12 Nissan Motor Co Ltd Power management system
JP2002315193A (en) * 2001-04-10 2002-10-25 Mitsubishi Heavy Ind Ltd Power control system
JP2007534281A (en) * 2003-07-09 2007-11-22 アロイス・ヴォベン Car

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013090462A (en) * 2011-10-19 2013-05-13 Mitsubishi Motors Corp Power feed control device for power supply device
JP2013198282A (en) * 2012-03-19 2013-09-30 Honda Motor Co Ltd Fuel cell system
JP2014042454A (en) * 2012-05-25 2014-03-06 Panasonic Corp On-vehicle power supply apparatus and photovoltaic apparatus
CN103490485A (en) * 2012-06-12 2014-01-01 现代摩比斯株式会社 Apparatus for bidirectional electric power supply between electric vehicle and smart grid and method of bidirectionally supplying electric power employing the same
JP2014027854A (en) * 2012-07-30 2014-02-06 Mitsubishi Electric Corp Charge/discharge device
KR101616233B1 (en) * 2012-07-30 2016-04-27 미쓰비시덴키 가부시키가이샤 Charging/discharging device
CN104508938A (en) * 2012-07-30 2015-04-08 三菱电机株式会社 Charging/discharging device
KR20150023040A (en) * 2012-07-30 2015-03-04 미쓰비시덴키 가부시키가이샤 Charging/discharging device
US9685800B2 (en) 2012-07-30 2017-06-20 Mitsubishi Electric Corporation Charging/discharging system
JP2014193039A (en) * 2013-03-27 2014-10-06 Panasonic Corp Vehicle power supply unit
CN105075057A (en) * 2013-03-27 2015-11-18 松下知识产权经营株式会社 Vehicle power unit
WO2014156030A1 (en) * 2013-03-27 2014-10-02 パナソニック株式会社 Vehicle power unit
EP2980955A4 (en) * 2013-03-27 2016-05-25 Panasonic Ip Man Co Ltd Vehicle power unit
WO2014174762A1 (en) * 2013-04-24 2014-10-30 パナソニックIpマネジメント株式会社 Power conversion system and connector
JP2014226014A (en) * 2013-04-24 2014-12-04 パナソニックIpマネジメント株式会社 Power conversion system and connector
JP2015092818A (en) * 2014-12-04 2015-05-14 三菱電機株式会社 Charging/discharging device

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