WO2022186524A1 - Chargeur/déchargeur de type à stockage d'énergie pour batterie secondaire, et procédé de charge/décharge d'une batterie secondaire l'utilisant - Google Patents

Chargeur/déchargeur de type à stockage d'énergie pour batterie secondaire, et procédé de charge/décharge d'une batterie secondaire l'utilisant Download PDF

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Publication number
WO2022186524A1
WO2022186524A1 PCT/KR2022/002385 KR2022002385W WO2022186524A1 WO 2022186524 A1 WO2022186524 A1 WO 2022186524A1 KR 2022002385 W KR2022002385 W KR 2022002385W WO 2022186524 A1 WO2022186524 A1 WO 2022186524A1
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WO
WIPO (PCT)
Prior art keywords
secondary battery
energy storage
charging
storage unit
discharging
Prior art date
Application number
PCT/KR2022/002385
Other languages
English (en)
Korean (ko)
Inventor
구회진
김유탁
유어현
차동민
정수안
Original Assignee
한국전지연구조합
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 한국전지연구조합 filed Critical 한국전지연구조합
Publication of WO2022186524A1 publication Critical patent/WO2022186524A1/fr

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    • 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
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • 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
    • H01M10/44—Methods for charging or discharging
    • 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
    • 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
    • H02J7/0042—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
    • H02J7/0045—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction concerning the insertion or the connection of the 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
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
    • 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
    • H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
    • 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
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • 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
    • H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/20—Charging or discharging characterised by the power electronics converter

Definitions

  • the present invention relates to an energy storage type secondary battery charging/discharging device and a secondary battery charging/discharging method using the same.
  • the secondary battery may be used in the form of a single secondary battery or in the form of a module or pack in which a plurality of secondary batteries are electrically connected, depending on the type of external device in which it is used.
  • a power source such as an electric vehicle or a hybrid electric vehicle or a medium or large device such as a large-capacity energy storage device requires a high level of output and capacity.
  • an activation process for the secondary battery is performed.
  • a charging/discharging process for the secondary battery is required.
  • repeated charging and discharging processes are required.
  • the charging/discharging process there is a problem in that a large amount of energy is consumed in this process.
  • FIG. 1 is a schematic diagram exemplarily showing a conventional charger/discharger.
  • the conventional charger/discharger 10 receives power from an external power source 20 to charge a secondary battery 30 , and the charged secondary battery 30 is discharged through a coil resistor 15 .
  • the converter 12 converts it into DC power.
  • the converted DC power is supplied to the secondary battery 30 to be charged and discharged through the control unit 13 .
  • the charger/discharger terminal portions 14(a) and 14(b) and the secondary battery terminal portions 31 and 32 are electrically connected to each other.
  • the electric energy charged in the secondary battery 30 is supplied to the coil resistor 15 , and the electric energy supplied from the coil resistor 15 is consumed.
  • the present invention is to provide an energy storage unit built-in charger/discharger that stores the discharge energy of a secondary battery and utilizes it as charging energy, and a secondary battery charging/discharging method using the same.
  • the present invention provides an energy storage unit built-in charger/discharger.
  • the charger and discharger according to the present invention a power supply for supplying electrical energy from the outside; a terminal part electrically connected to the power supply part and in electrical contact with a secondary battery to be charged/discharged; an energy storage unit electrically connected to the terminal unit and storing electrical energy; and a control unit electrically connected to the power supply unit, the terminal unit, and the energy storage unit, respectively, to control charging and discharging modes thereof.
  • the charger/discharger (i) charges the secondary battery using at least one of the power supply unit and the energy storage unit as a power source in the charging mode, and (ii) charges the energy storage unit using the charged secondary battery as a power source in the discharging mode do.
  • the power supply unit supplies AC power and is located between the power supply unit and the terminal unit, and includes a converter for converting AC power supplied from the power supply unit into DC power.
  • the controller in the charging mode, the controller primarily charges the secondary battery through the energy storage unit and secondary charges the energy storage unit through the power supply unit.
  • the control unit charges the secondary battery by SOC a% through the energy storage unit, and charges the secondary battery by SOC b% through the power supply unit, but the ratio of a to b (a/ b) ranges from 2 to 50, and the sum of a and b ranges up to 100.
  • the efficiency of energy stored in the energy storage unit compared to the discharge amount of the secondary battery of the charger/discharger is 80% or more.
  • the energy storage unit is a battery energy storage system (BESS).
  • BESS battery energy storage system
  • the present invention provides a secondary battery charging/discharging method using the above-described energy storage built-in charging/discharging device.
  • a secondary battery charging/discharging method includes the steps of charging a secondary battery to be charged and discharged; and discharging the charged secondary battery. Specifically, in the step of charging the secondary battery, the secondary battery is charged by using at least one of a power supply unit and an energy storage unit as a power source, and in the step of discharging the secondary battery, energy using the charged secondary battery as a power source Charge the storage unit.
  • the secondary battery in the charging of the secondary battery, is charged by SOC a% using the energy storage unit as a power source, and the secondary battery is charged by SOC b% by using the power supply unit as a power source, but a
  • the ratio (a/b) ranges from 2 to 50.
  • the power supply supplies AC power, and through a converter, further comprising a conversion step of converting AC power supplied from the power supply to DC power through a converter
  • the storage unit supplies DC power and charges the secondary battery without a separate conversion step.
  • the secondary battery charging/discharging method according to the present invention is performed in any one or more processes of a secondary battery activation process and a charging/discharging test for a secondary battery.
  • the present invention provides another type of charging/discharging method of a secondary battery through the above-described energy storage built-in charger and discharger.
  • the secondary battery charging/discharging method determines a charging or discharging mode for a secondary battery to be charged/discharged through a control unit, (a) in the charging mode, the charge amount SOC of the preset energy storage unit Based on x%, when the charge amount of the energy storage unit is SOC x% or more, the secondary battery is charged using the energy storage unit as a power source.
  • the secondary battery is charged using only the supply unit as a power source, where x is in the range of 0 to 50, and (b) in the discharging mode, energy discharged from the secondary battery is stored in the energy storage unit.
  • the energy discharged from the secondary battery is stored in the energy storage unit, and the charge capacity of the energy storage unit is 90% of the discharge capacity of the secondary battery or its More than that.
  • the secondary battery charging/discharging method is performed in any one or more processes of a secondary battery activation process and a secondary battery charging/discharging test.
  • the charging/discharging device and the secondary battery charging/discharging method using the same according to the present invention can increase energy efficiency by storing the discharge energy of the secondary battery and using it as the charging energy, and can be used in the activation process of the secondary battery.
  • FIG. 1 is a schematic diagram showing a conventional charger/discharger.
  • FIG. 2 is a schematic diagram showing a charger/discharger according to an embodiment of the present invention.
  • 3 and 4 are schematic diagrams showing a charging mode or a discharging mode of the charger/discharger according to an embodiment of the present invention, respectively.
  • the present invention provides an energy storage type charger/discharger, which has a structure including or incorporating an energy storage unit.
  • the charger and discharger according to the present invention, a power supply for supplying electrical energy from the outside; a terminal part electrically connected to the power supply part and in electrical contact with a secondary battery to be charged/discharged; an energy storage unit electrically connected to the terminal unit and storing electrical energy; and a control unit electrically connected to the power supply unit, the terminal unit, and the energy storage unit, respectively, to control charging and discharging modes thereof.
  • the control unit switches and controls the charger/discharger to a charging mode or a discharging mode.
  • any one or more of the power supply unit and the energy storage unit is used as a power to charge the secondary battery
  • the charged secondary battery is used as a power source to charge the energy storage unit.
  • the energy storage unit In the charging mode, the energy storage unit alone powers, or the power supply unit and the energy storage unit use public power.
  • the power supply unit and the energy storage unit are public power sources, the energy storage unit serves as the primary power source and the power supply unit serves as the secondary power source.
  • the power supply unit may be used as the power source.
  • an activation process including a process of charging and discharging the secondary battery is performed.
  • discharge energy is consumed by using a resistance coil.
  • Equation (1) when a 100 Ah battery cell is charged and discharged once, about 420 W is consumed as shown in Equation (1) below.
  • the present invention by storing and utilizing the power lost during discharging the secondary battery in the energy storage device, it is possible to prevent power wastage.
  • energy efficiency of about 95% is shown, and this can be used again when charging the secondary battery. Accordingly, the present invention can prevent a huge amount of power consumed in the secondary battery activation process and significantly increase energy efficiency.
  • the power supply supplies AC power.
  • it is located between the power supply unit and the terminal unit, includes a converter for converting AC power supplied from the power supply unit into DC power.
  • the controller in the charging mode, primarily charges the secondary battery through the energy storage unit, and secondary charges the energy storage unit through the power supply unit.
  • the controller primarily charges the secondary battery through the energy storage unit, and secondary charges the energy storage unit through the power supply unit.
  • the energy storage unit as the primary power source, the stored power is consumed first, and the shortage is covered by the external power source.
  • the control unit charges a secondary battery by SOC a% through the energy storage unit and charges the secondary battery by SOC b% through the power supply in the charging mode, but the ratio of a to b (a/b) is in the range of 2 to 50, and the sum of a and b is in the range of 100 or less.
  • the secondary battery may be fully charged by SOC by 85% through the energy storage unit and by SOC by 15% by charging the secondary battery by SOC through the power supply unit.
  • the charging mode it is also possible to charge the secondary battery to SOC 70% by charging the secondary battery to SOC 70% through the energy storage unit. In this case, charging of the secondary battery through the power supply is not performed.
  • the energy efficiency stored in the energy storage unit relative to the discharge amount of the secondary battery is 80% or more.
  • the energy efficiency is greater than 85%, greater than 90%, or in the range of 83 to 98%.
  • the energy efficiency may vary depending on the type of secondary battery to be charged and discharged. For example, in the case of a lithium secondary battery, energy efficiency of 90% or more, or 93 to 96% level may be realized. For another example, in the case of a lead-acid battery, energy efficiency of 80% or more, or 83 to 90% level can be implemented.
  • the energy storage unit is an all-terrain energy storage system (BESS).
  • BESS all-terrain energy storage system
  • a secondary battery charging/discharging method comprises the steps of charging a secondary battery to be charged and discharged; and discharging the charged secondary battery. Specifically, in the step of charging the secondary battery, the secondary battery is charged by using at least one of a power supply unit and an energy storage unit as a power source, and in the step of discharging the secondary battery, energy using the charged secondary battery as a power source Charge the storage unit.
  • the present invention is characterized in that the energy is stored in the energy storage unit when the secondary battery is discharged, and the stored energy is used when the secondary battery is charged.
  • the secondary battery in the step of charging the secondary battery, the secondary battery is charged by SOC a% using the energy storage unit as a power source, and the secondary battery is charged by SOC b% by using the power supply unit as a power source, but the ratio of a to b (a/b) ranges from 2 to 50.
  • the secondary battery may be charged by SOC 95% by using the energy storage unit as the power source, and the secondary battery may be charged by SOC 5% by using the power supply unit as the power supply.
  • the secondary battery in the charging of the secondary battery, it is also possible to charge the secondary battery to a preset reference value using the energy storage unit as a power source. In this case, charging through the power supply is not separately performed.
  • the power supply unit supplies AC power
  • the method further includes a conversion step of converting AC power supplied from the power supply unit into DC power through a converter.
  • the energy storage unit supplies DC power and charges the secondary battery without a separate conversion step. Charging the secondary battery through the energy storage unit does not require a separate conversion step, so high energy efficiency can be achieved.
  • the secondary battery charging/discharging method may be performed in any one or more processes of a secondary battery activation process and a secondary battery charging/discharging test.
  • the present invention provides another type of secondary battery charging/discharging method through the above-described energy storage type charging/discharging device.
  • the secondary battery charging/discharging method according to the present invention determines a charging or discharging mode for a secondary battery to be charged/discharged through a control unit.
  • (a) in the charging mode based on the preset charge amount SOC of 30% of the energy storage unit, when the charge amount of the energy storage unit is SOC 30% or more, the secondary battery is charged using the energy storage unit as a power source, and the energy storage unit is charged. If the charge amount is less than 30% SOC, the secondary battery is charged by using the energy storage unit and the power supply unit together or using only the power supply unit as the power source.
  • the energy discharged from the secondary battery is stored in the energy storage unit, but the charge capacity of the energy storage unit is 90% or more of the discharge capacity of the secondary battery.
  • the charge capacity of the energy storage unit is twice the discharge capacity of the secondary battery.
  • the charging capacity of the energy storage unit may be in the range of 10% to 90% of the discharge capacity of the secondary battery.
  • the secondary battery charging/discharging method may be performed in any one or more of a secondary battery activation process and a secondary battery charge/discharge test.
  • the charger/discharger 100 includes a converter 120 for converting AC power supplied from the outside into DC power, and a controller 130 for controlling the operation or mode of the charger/discharger 100 . and an energy storage unit 150 for storing discharge energy of the secondary battery 300 .
  • the charger/discharger 100 includes a power supply unit 110 electrically connected to an external power source 200 to receive AC power, and terminal units 141 and 142 in electrical contact with the secondary battery 300 .
  • the secondary battery 300 is a secondary battery, and may be in the form of a battery cell, or may be in the form of a battery module or battery pack.
  • the secondary battery 300 is a battery pack in which pouch-type battery cells are assembled.
  • the secondary battery 300 includes secondary battery terminal parts 311 and 312 that are electrically connected to or in contact with the outside.
  • the control unit 130 controls the operation or mode of the charger/discharger 100 . Specifically, the charging mode or the driving mode for the secondary battery 300 is controlled and switched.
  • the energy storage unit 150 stores the discharge energy of the secondary battery 300 .
  • the electric energy stored in the energy storage unit 150 may be utilized when charging the secondary battery 300 .
  • the energy storage unit 150 is in the form of an Energy Storage System (ESS) or a Battery Energy Storage System (BESS).
  • ESS Energy Storage System
  • BESS Battery Energy Storage System
  • 3 and 4 are schematic diagrams showing a charging mode or a discharging mode of the charger/discharger according to an embodiment of the present invention, respectively.
  • a charging mode of the charger/discharger is shown.
  • the secondary battery 300 is charged by using at least one of the power supply unit 110 and the energy storage unit 150 as a power source.
  • the controller 130 controls the energy storage unit 150 as the primary power source and the power supply unit 110 as the secondary power source.
  • the secondary battery 300 is It is possible to buffer for
  • a discharge mode of the charger/discharger is shown.
  • the discharge energy of the secondary battery 300 is stored in the energy storage unit 150, and the efficiency is about 95%. Energy stored in the energy storage unit 150 is used to charge the secondary battery 300 .
  • Secondary battery capacity Energy efficiency (%) by type of secondary battery lithium secondary battery lead acid battery More than 100 kW ⁇ 250 kW or less 95 85 More than 250 kW to less than 500 kW More than 500 kW to less than 1000 kW 94 More than 1000 kW ⁇ 2500 kW or less
  • the lithium secondary battery showed an energy efficiency of 94% or 95%
  • the lead-acid battery showed an energy efficiency of 85%
  • the redox flow battery showed an energy efficiency of about 70%.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Abstract

La présente invention concerne un chargeur/déchargeur de type à stockage d'énergie pour une batterie secondaire, et un procédé de charge/décharge d'une batterie secondaire l'utilisant. Comme l'énergie de décharge d'une batterie secondaire est stockée au moyen d'une partie de stockage d'énergie et est utilisée comme énergie de charge, l'efficacité énergétique peut être améliorée, et l'application à un processus de formation de batterie secondaire et similaire est possible.
PCT/KR2022/002385 2021-03-02 2022-02-17 Chargeur/déchargeur de type à stockage d'énergie pour batterie secondaire, et procédé de charge/décharge d'une batterie secondaire l'utilisant WO2022186524A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2021-0027487 2021-03-02
KR1020210027487A KR20220123925A (ko) 2021-03-02 2021-03-02 에너지 저장형 이차전지 충방전기 및 이를 이용한 이차전지 충방전 방법

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WO2022186524A1 true WO2022186524A1 (fr) 2022-09-09

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PCT/KR2022/002385 WO2022186524A1 (fr) 2021-03-02 2022-02-17 Chargeur/déchargeur de type à stockage d'énergie pour batterie secondaire, et procédé de charge/décharge d'une batterie secondaire l'utilisant

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WO (1) WO2022186524A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011080966A (ja) * 2009-10-09 2011-04-21 Toshiba It & Control Systems Corp 電池パック検査装置
US20130335009A1 (en) * 2012-06-19 2013-12-19 Hitachi, Ltd. Inspection System, Charger/Discharger, and Inspection Method of Secondary Battery
KR20140070217A (ko) * 2012-11-30 2014-06-10 주식회사 엘지화학 충방전 테스트를 위한 제어 알고리즘을 포함하는 전력저장시스템
JP2014220896A (ja) * 2013-05-07 2014-11-20 東芝Ｉｔコントロールシステム株式会社 充放電制御装置
KR20200140573A (ko) * 2019-06-07 2020-12-16 강재봉 0v 완전 방전이 가능한 회생형 배터리 시험장치, 이를 이용한 방전방법

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160047281A (ko) 2014-10-22 2016-05-02 국민대학교산학협력단 배터리 충방전 기능을 갖는 양방향 컨버터 회로

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011080966A (ja) * 2009-10-09 2011-04-21 Toshiba It & Control Systems Corp 電池パック検査装置
US20130335009A1 (en) * 2012-06-19 2013-12-19 Hitachi, Ltd. Inspection System, Charger/Discharger, and Inspection Method of Secondary Battery
KR20140070217A (ko) * 2012-11-30 2014-06-10 주식회사 엘지화학 충방전 테스트를 위한 제어 알고리즘을 포함하는 전력저장시스템
JP2014220896A (ja) * 2013-05-07 2014-11-20 東芝Ｉｔコントロールシステム株式会社 充放電制御装置
KR20200140573A (ko) * 2019-06-07 2020-12-16 강재봉 0v 완전 방전이 가능한 회생형 배터리 시험장치, 이를 이용한 방전방법

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