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WO2018190020A1 - Système combiné d'accumulation de puissance - Google Patents

Système combiné d'accumulation de puissance Download PDF

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Publication number
WO2018190020A1
WO2018190020A1 PCT/JP2018/007879 JP2018007879W WO2018190020A1 WO 2018190020 A1 WO2018190020 A1 WO 2018190020A1 JP 2018007879 W JP2018007879 W JP 2018007879W WO 2018190020 A1 WO2018190020 A1 WO 2018190020A1
Authority
WO
WIPO (PCT)
Prior art keywords
type battery
power
capacity
battery
storage system
Prior art date
Application number
PCT/JP2018/007879
Other languages
English (en)
Japanese (ja)
Inventor
晋 山内
大輝 小松
井上　健士
繁貴 坪内
Original Assignee
株式会社日立製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社日立製作所 filed Critical 株式会社日立製作所
Publication of WO2018190020A1 publication Critical patent/WO2018190020A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from 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
    • 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
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/64—Constructional details of batteries specially adapted for electric vehicles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/14—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
    • H02M7/42—Conversion of DC power input into AC power output without possibility of reversal
    • H02M7/44—Conversion of DC power input into AC power output without possibility of reversal by static converters
    • H02M7/48—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • 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

Definitions

  • the present invention relates to a composite power storage system.
  • Patent Document 1 discloses a vehicle in which a high-power assembled battery (hereinafter referred to as a power-type battery) excellent in output characteristics and a high-capacity assembled battery (hereinafter referred to as a capacity-type battery) are arranged.
  • a power-type battery a high-power assembled battery
  • a capacity-type battery a high-capacity assembled battery
  • the composite power storage system described in Patent Documents 1 and 2 mainly uses a capacity type battery, and when the capacity type battery alone cannot respond to the output request from the driver or the regenerative power at the time of deceleration, the power type battery is used. It is assumed to be used. For this reason, the load by charging / discharging accumulate
  • An object of the present invention is to suppress battery deterioration.
  • a power type battery and a capacity type battery are provided, the power type battery and the capacity type battery are directly connected in parallel with each other, and the power type battery and the capacity type battery are connected to the motor via the power converter.
  • a composite power storage system in which the resistance value of the wiring from the battery to the power converter is smaller than the resistance value of the wiring from the capacitive battery to the power converter.
  • the structure of the composite electrical storage system in one Embodiment of this invention and the electric vehicle carrying it is shown.
  • the voltage range of the power type battery and capacity type battery of the composite electrical storage system in one Embodiment of this invention is shown.
  • the electric circuit model of the composite electrical storage system in one Embodiment of this invention is shown.
  • An example of the current characteristic of each battery with respect to charging / discharging electric current in the electric circuit model of the composite electrical storage system in this invention is shown.
  • An example of the relationship figure of the battery capacity and battery resistance of the composite electrical storage system in this invention is shown. 1 shows an example of a configuration of a composite power storage system according to the present invention.
  • 1 shows an example of a configuration of a composite power storage system according to the present invention.
  • FIG. 1 shows a configuration of a composite power storage system 100 according to the present embodiment and an electric vehicle 10 equipped with the same.
  • the electric vehicle 10 includes a composite power storage system 100 including a power type battery 13 and a capacity type battery 14 connected in parallel to the power type battery 13.
  • the power type battery 13 or the capacity type battery 14 may be referred to as a battery.
  • the power type battery 13 and the capacity type battery 14 are used in combination. Since the power type battery 13 and the capacity type battery 14 are directly connected in parallel, the discharge current during travel of the electric vehicle 10 and the charge current during regeneration are distributed according to the resistance ratio of both batteries. For this reason, compared with the case where the capacity type battery 14 is mainly used, a load reduces and it leads to suppression of deterioration of a battery. Furthermore, since the power type battery 13 and the capacity type battery 14 are directly connected in parallel, a junction box for arbitrarily controlling connection and disconnection as in the conventional case is unnecessary, and the structure can be simplified. This also leads to cost reduction of the composite power storage system 100.
  • the capacity-type battery 14 and the power-type battery 13 may be greatly different during operation of the electric vehicle 10. In such a state, it is difficult to directly connect the capacity type battery 14 and the power type battery 13. In the prior art method, it is necessary to provide respective input terminals for the capacity type battery 14 and the power type battery 13 on the input side of the inverter 12. For this reason, there is a concern that the system configuration becomes complicated in the prior art and the cost of the system increases.
  • One embodiment of the present invention solves the above problems.
  • the composite power storage system 100 is connected to the motor generator 11 via an inverter 12 (power converter) that is a power converter.
  • wiring is performed such that the resistance value of the wiring from the power type battery 13 to the inverter 12 is smaller than the resistance value of the wiring from the capacity type battery 14 to the inverter 12.
  • the wiring from the power type battery 13 to the inverter 12 is wired so as to be shorter than the wiring from the capacity type battery 14 to the inverter 12. Or you may wire so that the cross-sectional area of the wiring from the power type battery 13 to the inverter 12 may become larger than the wiring from the capacity type battery 14 and the inverter 12.
  • the inverter 12, the power type battery 13, and the capacity type battery 14 are controlled by an ECU 15 (“ECU” is an abbreviation for “Electronic Control Unit”).
  • the motor generator 11 is an AC machine, for example, an induction machine or a synchronous machine.
  • DC power is output from the power type battery 13 and the capacity type battery 14 to the inverter 12.
  • the inverter 12 converts DC power supplied from the power type battery 13 and the capacity type battery 14 into three-phase AC power.
  • the motor generator 11 is rotationally driven as an electric motor by the three-phase AC power output from the inverter 12. Thereby, the electric vehicle 10 travels.
  • the electric vehicle 10 When the electric vehicle 10 is decelerated or braked, that is, when the motor generator 11 is regenerated, the AC power generated by the motor generator 11 is converted into DC power by operating the inverter 12 as a rectifier, and the power type The battery 13 and the capacity type battery 14 are charged. When the electric vehicle 10 is parked, the capacity type battery 14 and the power type battery 13 are charged by a charging device (not shown). 1 may be configured by separate motors and generators.
  • the power type battery 13 is superior in power density to the capacity type battery 14 but has a smaller capacity (Ah).
  • a power type battery 13 for example, a lithium ion battery or a nickel metal hydride battery is applied.
  • a power storage device such as a lithium ion capacitor or an electric twentieth layer capacitor having the same high output characteristics (so-called power type power storage device) may be used.
  • these batteries and capacitors are collectively referred to as “power type batteries”.
  • the output density of the capacity type battery 14 is inferior to that of the power type battery 13, it is excellent in energy density and has a large capacity (Ah).
  • a capacity type battery 14 a lithium ion battery, a lithium ion semi-solid battery, a lithium solid battery, a lead battery, a nickel zinc battery, etc. are applied.
  • the lithium ion battery used as the power type battery 13 and the lithium ion battery used as the capacity type battery 14 have different configurations such as electrode materials.
  • FIG. 2 shows voltage ranges of the power type battery 13 and the capacity type battery 14 to be considered when constructing the composite power storage system 100 according to the present embodiment.
  • the voltage range of the series connection of the power type battery 13 and the voltage range of the series connection of the capacity type battery 14 are configured to overlap each other. This is because, when there is no overlap, a charging current always flows from a battery having a high voltage to a battery having a low voltage, so that it is difficult to function with the composite power storage system 100.
  • the voltage range of the usable range (23) is set to “upper limit value (24) ⁇ lower limit value (25)”, and this voltage width is increased in consideration of the voltage range of the power supply target and the performance of the battery to be used.
  • the series number of the power type battery 13 and the capacity type battery 14 is determined.
  • the power-type battery 13 and the capacity-type battery 14 are connected without a current control element such as a DCDC converter, and the current during charging / discharging is uniquely determined by the characteristics of the power-type battery 13 and the capacity-type battery 14. Therefore, these batteries need to be optimally combined so that the composite power storage system 100 exhibits desired characteristics. The reason will be described with reference to FIG.
  • FIG. 3 is a diagram modeling a state in which the power type battery 13 and the capacity type battery 14 are connected in parallel, and an electric circuit model of the composite power storage system 100 in one embodiment of the present invention.
  • the fluctuation of the voltage of the battery due to charging / discharging was simulated by the capacitor unit, and the internal resistance of the battery and the wiring resistance from the battery to the inverter 12 were simulated by electric resistance.
  • the electric resistance R 1 and the capacitor capacity C 1 are based on the power type battery 13.
  • the initial battery voltage, that is, the state of charge is V (0), and the total current of the power type battery 13 and the capacity type battery 14 is I. At this time, the voltage of the battery when the current I changes can be expressed by the following formulas (1) and (2).
  • the currents of the power type battery 13 and the capacity type battery 14 can be expressed by the following formulas (3) and (4).
  • FIG. 4 shows an example of the current characteristics of each battery.
  • the currents of the power type battery 13 and the capacity type battery 14 are distributed according to the ratio of the resistance, and the current from the power type battery 13 decreases as time passes, and the capacity The current of the type battery 14 increases.
  • the resistance ratio of the power type battery 13 and the capacity type battery 14 is as large as possible.
  • the power type battery 13 is manufactured so that the resistance value of the battery becomes small from the viewpoint of improving output characteristics. For this reason, if the capacity is the same, the resistance of the power type battery 13 is smaller than that of the capacity type battery 14. However, in the composite power storage system 100 according to the present embodiment, the capacity of the power type battery 13 is smaller than that of the capacity type battery 14 from the viewpoint of supplying and absorbing a large current fluctuation in a short time by the power type battery 13.
  • FIG. 5 shows an example of a relationship diagram between the battery capacity and the battery resistance of the composite power storage system according to the present invention.
  • FIG. 5 shows an example of a difference in resistance value between the power type battery 13 and the capacity type battery 14 when the capacities are different.
  • the horizontal axis represents the capacity of the battery, and the vertical axis represents the magnitude of the resistance.
  • the resistance of the power type battery 13 and the capacity type battery 14 generally tends to decrease as the capacity increases.
  • the resistance of the power type battery 13 is smaller than that of the capacity type battery 14 if the capacity is the same.
  • the composite power storage system is constructed using the power type battery 13 having the white circle capacity and the capacity type battery 14 having the black circle capacity in FIG.
  • the resistance of the capacity type battery 14 and the power type battery 13 is different due to the difference in capacity.
  • the difference is smaller.
  • the power type battery 13 cannot supply or absorb large current fluctuations during acceleration or deceleration. From the above, when the composite power storage system 100 is constructed, it is desirable to reduce not only the resistance value of each battery but also the resistance value including the wiring.
  • FIG. 6 shows an example of the configuration of the composite power storage system in the present embodiment.
  • the wiring between the power type battery 13 and the inverter 12 is performed so that the power type battery 13 can charge and discharge a large current in a short time. Is made shorter than the wiring between the capacity type battery 14 and the inverter 12, the resistance of the wiring can be reduced.
  • FIG. 7 shows another example of the configuration of the composite power storage system in the present embodiment. Also in this case, by increasing the cross-sectional area of the wiring between the power type battery 13 and the inverter 12 as compared with the wiring between the capacity type battery 14 and the inverter 12, the resistance of the wiring can be reduced, and the power type battery 13 can be shortened in a short time. A large current can be charged and discharged.

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

Abstract

L'invention concerne un système combiné d'accumulation de puissance ayant une batterie de type à puissance et une batterie de type à capacité : la batterie de type à puissance et la batterie de type à capacité étant directement connectées en parallèle entre elles ; la batterie de type à puissance et la batterie de type à capacité étant connectées à un moteur par le biais d'un convertisseur de puissance ; la valeur de résistance de câblage entre la batterie de type à puissance et le convertisseur de puissance étant inférieure à la valeur de résistance de câblage entre la batterie de type à capacité et le convertisseur ; et, par ex., la longueur du câblage entre la batterie de type à puissance et le convertisseur de puissance étant inférieure à la longueur du câblage entre la batterie de type à capacité et le convertisseur de puissance. Cela permet de répartir les courants de charge et de décharge générés pendant le trajet d'une automobile électrique vers la batterie de type à puissance, permettant ainsi d'inhiber la dégradation de la batterie de type à capacité.
PCT/JP2018/007879 2017-04-10 2018-03-01 Système combiné d'accumulation de puissance WO2018190020A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017077249A JP2018182856A (ja) 2017-04-10 2017-04-10 複合蓄電システム
JP2017-077249 2017-04-10

Publications (1)

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WO2018190020A1 true WO2018190020A1 (fr) 2018-10-18

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PCT/JP2018/007879 WO2018190020A1 (fr) 2017-04-10 2018-03-01 Système combiné d'accumulation de puissance

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WO (1) WO2018190020A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007506395A (ja) * 2003-09-15 2007-03-15 エレクトロバヤ インク． 可変電力消費を有する負荷用のエネルギ貯蔵装置
WO2015098790A1 (fr) * 2013-12-27 2015-07-02 株式会社 村田製作所 Bloc-batterie
WO2016167012A1 (fr) * 2015-04-15 2016-10-20 株式会社豊田自動織機 Dispositif d'alimentation électrique

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007506395A (ja) * 2003-09-15 2007-03-15 エレクトロバヤ インク． 可変電力消費を有する負荷用のエネルギ貯蔵装置
WO2015098790A1 (fr) * 2013-12-27 2015-07-02 株式会社 村田製作所 Bloc-batterie
WO2016167012A1 (fr) * 2015-04-15 2016-10-20 株式会社豊田自動織機 Dispositif d'alimentation électrique

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JP2018182856A (ja) 2018-11-15

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