WO2018079918A1 - Dispositif d'équilibrage de cellules de batterie - Google Patents

Dispositif d'équilibrage de cellules de batterie Download PDF

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Publication number
WO2018079918A1
WO2018079918A1 PCT/KR2016/013632 KR2016013632W WO2018079918A1 WO 2018079918 A1 WO2018079918 A1 WO 2018079918A1 KR 2016013632 W KR2016013632 W KR 2016013632W WO 2018079918 A1 WO2018079918 A1 WO 2018079918A1
Authority
WO
WIPO (PCT)
Prior art keywords
cell
battery
converter
cells
overcharge
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/KR2016/013632
Other languages
English (en)
Korean (ko)
Inventor
장병훈
김수열
최진혁
이성은
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Korea Electric Power Corp
Original Assignee
Korea Electric Power Corp
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 Korea Electric Power Corp filed Critical Korea Electric Power Corp
Publication of WO2018079918A1 publication Critical patent/WO2018079918A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H02J7/50—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries acting upon multiple batteries simultaneously or sequentially
    • H02J7/52—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries acting upon multiple batteries simultaneously or sequentially for charge balancing, e.g. equalisation of charge between batteries
    • H02J7/56—Active balancing, e.g. using capacitor-based, inductor-based or DC-DC converters
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
    • 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
    • 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
    • H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • 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
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present application relates to a battery cell balancing device.
  • Battery energy storage system (Battery Energy Storage System) is a device that stores or discharges the electric energy in the battery, if necessary, has been frequently applied to the current power system for the purpose of peak reduction, frequency control and renewable energy stabilization.
  • inter-cell balancing is required to uniformize cell performance.
  • Such cell balancing includes passive cell balancing and active cell balancing.
  • Passive balancing has a disadvantage in that energy is generated by connecting a resistor in parallel to a unit cell and discharging it through a resistor during overvoltage, and the balancing effect is insignificant. Recently, active balancing has been developed.
  • One embodiment of the present invention is to provide a battery cell balancing device that can provide efficient cell balancing by boosting the energy of the overcharged cell to supplement the undercharged cell.
  • the battery cell balancing device includes at least one of a battery module including a plurality of battery cells and at least one of the plurality of battery cells undercharged to a capacity less than a predetermined amount by using energy of at least one overcharged cell that is overcharged to a predetermined or more capacity. It may include a balancing module for charging the lack of charging cells.
  • the balancing module may include a DC-DC converter for boosting energy of the overcharge cell to provide the undercharge cell.
  • the balancing module connects the at least one overcharge cell to an input terminal of the DC-DC converter according to the charge amount of each of the DC-DC converter and the plurality of battery cells, and the at least one shortage. It may include a switch unit for switching operation to connect the charging cell to the output terminal of the DC-DC converter.
  • the battery module may monitor a charge amount of each of the plurality of battery cells, set a battery cell charged above a first reference amount as the overcharge cell, and undercharge the battery cell charged below a second reference amount.
  • the apparatus may further include a detector configured to be a cell, wherein the first reference amount may be equal to or greater than the second reference amount.
  • the balancing module determines the at least one overcharge cell and the at least one undercapacity cell based on the output of the detector and connects the at least one overcharge cell to an input of the DC-DC converter. And a controller for controlling the operation of the switch unit to connect and connect the at least one undercharge battery to an output terminal of the DC-DC converter.
  • the switch unit may include a discharge switch unit including a plurality of discharge switches connected to both ends of the plurality of battery cells and an input terminal of the DC-DC converter, and the both ends of the plurality of battery cells and the DC- It may include a charging switch unit including a plurality of charging switches connected to the output terminal of the DC converter.
  • the plurality of discharge switches respectively correspond to the plurality of charge switches and may be connected in series with each other.
  • the switching states of the plurality of discharge switches may not correspond to each other.
  • the plurality of battery cells may be connected in parallel to each other through the switch unit.
  • the controller if there are a plurality of overcharge cells and a plurality of undercharge cells, the plurality of overcharge cells are all connected to the input terminal of the DC-DC converter and the plurality of undercharge cells are all DC It is possible to control the operation of the switch part to be connected to the output terminal of the direct current converter.
  • the battery cell balancing device may include at least one of the overcharged battery cells according to the amount of charge of each of the battery module including M battery cells, the N DC-DC converters, and the M battery cells.
  • a switch unit connected to an input of any one of the converters, the switching unit being configured to switch at least one of the undercharged battery cells to an output of any one of the N DC-DC converters, wherein M and N are natural numbers. Equation M> N may be satisfied.
  • by boosting the energy of the overcharged cell to supplement the undercharged cell can have an effect that can provide efficient cell balancing.
  • FIG. 1 is a block diagram illustrating a battery cell balancing device according to an embodiment of the present invention.
  • FIG. 2 is a block diagram illustrating a battery cell balancing device according to another embodiment of the present invention.
  • FIG. 3 is a block diagram illustrating an embodiment of the battery module illustrated in FIG. 2.
  • FIG. 4 is a block diagram illustrating an embodiment of the balancing module shown in FIG. 2.
  • FIG. 5 is a block diagram illustrating another embodiment of the balancing module shown in FIG. 2.
  • FIG. 6 is a flowchart illustrating a control method of a battery cell balancing apparatus according to an embodiment of the present invention.
  • FIG. 1 is a block diagram illustrating a battery cell balancing device according to an embodiment of the present invention.
  • a battery cell balancing device may include a battery module 110 and a balancing module 120.
  • the battery module 110 may include a plurality of battery cells.
  • the balancing module 120 may include at least one of a plurality of battery cells that are undercharged to a less than a predetermined capacity by using energy of at least one overcharged battery cell (hereinafter, referred to as an "overcharge cell”) that is overcharged to a predetermined capacity or more.
  • the low charge battery cell (hereinafter, referred to as a “low charge cell”) can be charged.
  • the balancing module 120 may include a DC-DC converter, and the DC-DC converter may boost the energy of the overcharged cell to provide the insufficient charge cell. That is, the overcharge cell may be connected to the input terminal of the DC-DC converter, and the undercharge cell may be connected to the output terminal of the DC-DC converter.
  • the efficiency of balancing can be increased by boosting the energy of the overcharged cell to provide the insufficient charge cell.
  • one or more overcharged cells or undercharged cells may be provided, respectively, and may have different numbers. That is, one or more overcharge cells may be connected to an input terminal of one DC-DC converter, or one or more undercharge cells may be connected to an output terminal of one DC-DC converter.
  • FIG. 2 is a block diagram illustrating a battery cell balancing device according to another embodiment of the present invention.
  • the battery module 110 and the balancing module 120 may be included.
  • the battery module 110 may include a plurality of battery cells 111, and may further include a detector 112 according to an embodiment.
  • an overcharge cell or undercharge cell may exist in the plurality of battery cells 111.
  • the detector 112 may monitor the amount of charge of each of the plurality of battery cells 111 and determine an overcharge cell and an undercharge cell.
  • the detector 112 may set a battery cell charged above the first reference amount as an overcharge cell, and set a battery cell charged below the second reference amount as an undercharge cell.
  • the first reference amount may be equal to or greater than the second reference amount.
  • the battery balancing is more precise.
  • the purpose is to make the battery balancing more rough.
  • the detector 112 is illustrated as being included in the battery module 110, but in some embodiments, the detector 112 may be included in the balancing module 120 instead of the battery module 110.
  • the balancing module 120 may include a DC-DC converter 120 and a switch unit 122. According to an embodiment, the controller 123 may be further included.
  • the DC-DC converter 120 may boost the energy of the overcharge cell to provide the undercharge cell. That is, the overcharge cell may be connected to the input terminal of the DC-DC converter, and the undercharge cell may be connected to the output terminal of the DC-DC converter.
  • the switch unit 122 connects the at least one overcharge cell to an input terminal of the DC-DC converter according to the charge amount of each of the plurality of battery cells, and connects the at least one undercharge cell to an output terminal of the DC-DC converter.
  • the switching operation may be to connect to.
  • the controller 1230 may control the switching operation of the switch unit 122.
  • the controller 1230 can determine at least one overcharge cell and at least one undercapacity cell based on the output of the detector 112.
  • the controller 1230 may operate the switch unit 122 to connect at least one overcharge cell to an input terminal of the DC-DC converter 121 and to connect at least one undercharge cell to an output terminal of the DC-DC converter 121. Can be controlled.
  • the controller 1230 has a plurality of overcharge cells and a plurality of undercharge cells, the plurality of overcharge cells are all connected to the input terminal of the DC-DC converter 121 and the plurality of undercharge cells are all DC. It is possible to control the operation of the switch unit 122 to be connected to the output terminal of the DC converter 121.
  • FIG. 3 is a block diagram illustrating an embodiment of the battery module illustrated in FIG. 2.
  • FIG. 3 a plurality of battery cells and a plurality of detectors respectively connected thereto are illustrated.
  • One end of the battery cell may be connected to the switch unit, and the other end may be connected to one end of the detector.
  • One end of the detector may be connected to the other end of the battery cell, and the other end of the detector may be connected to the controller and the switch unit.
  • the detector may be implemented as various circuits for detecting the capacity of the battery cell, the circuit configuration of the detector is not particularly limited herein.
  • FIG. 4 is a block diagram illustrating an embodiment of the balancing module shown in FIG. 2.
  • FIG. 4 the connection relationship between the battery cell 111, the switch units 122_1 and 122_2 and the DC-DC converter 121 is illustrated.
  • the plurality of battery cells 111 are directly connected to each other, but this may be connected to each other in parallel as an example.
  • the switch units 122_1 and 122_2 may be connected to the plurality of battery cells 111 in parallel. Therefore, the plurality of battery cells 111 may be connected in parallel with each other through the switch units 122_1 and 122_2.
  • the switch units 122_1 and 122_2 may include a discharge switch unit 122_1 and a charge switch unit 122_2.
  • the discharge switch 122_1 may include a plurality of discharge switches connected to both ends of the plurality of battery cells and the input terminal of the DC-DC converter 121.
  • the discharge switch When the discharge switch is connected to the ON state, the battery cell connected thereto is connected to the input terminal of the DC-DC converter 121. Therefore, the discharge switch connected to the overcharge cell may operate in the ON state.
  • the charge switch unit 122_2 may include a plurality of charge switches connected to both ends of the plurality of battery cells and the output end of the DC-DC converter 121.
  • the charge switch When the charge switch is connected to the ON state, the battery cell connected thereto is connected to the output terminal of the DC-DC converter 121.
  • the charge switch connected to the undercharge cell can operate in the ON state.
  • the plurality of discharge switches respectively correspond to the plurality of charge switches and may be connected in series with each other. That is, as shown, each of the plurality of discharge switch and the plurality of charge switch can be connected in series in a 1: 1 correspondence. However, the switching states of the plurality of discharge switches may not correspond to each other.
  • FIG. 5 is a block diagram illustrating another embodiment of the balancing module shown in FIG. 2.
  • One embodiment shown in FIG. 5 relates to an embodiment comprising a plurality of DC-DC converters.
  • M and N may satisfy the formula M> N as a natural number. . That is, the number of DC-DC converters may be smaller than the number of battery cells.
  • the switch unit may be configured to connect at least one of the overcharged battery cells to an input terminal of any one of the N DC-DC converters according to the charge amount of each of the M battery cells, and connect the at least one of the undercharged battery cells to the
  • the switching operation may be performed to connect to an output terminal of any one of the N DC-DC converters.
  • FIG. 6 is a flowchart illustrating a control method of a battery cell balancing apparatus according to an embodiment of the present invention.
  • the battery cell balancing device may detect an overcharge cell and an undercharge cell (S610).
  • the battery cell balancing apparatus checks whether the number of detected overcharged cells is one (S620), and if there is one (S620, yes), the battery cell balancing device may determine whether the number of detected undercharged cells is one (S630).
  • the switching unit may be controlled to provide energy of one overcharge cell to one undercharge cell (S640). Specifically, the switching control may be performed such that one overcharge cell is connected to the input terminal of the DC-DC converter and one undercharge cell is connected to the output terminal of the DC-DC converter.
  • the switching unit may be controlled to provide energy of one overcharged cell to the plurality of undercharged cells (S650). Specifically, the switching control may be performed such that one overcharge cell is connected to the input terminal of the DC-DC converter and a plurality of undercharge cells are connected to the output terminal of the DC-DC converter.
  • the switching unit may be controlled to provide energy of the plurality of overcharged cells to one or more undercharged cells (S660). Specifically, the switching control may be performed such that the plurality of overcharge cells are connected to the input terminal of the DC-DC converter and one or more undercharge cells are connected to the output terminal of the DC-DC converter.
  • the capacity consumed in the overcharge cell is proportionally different according to the capacity difference, so that the overall balancing can be performed without balancing between the overcharge cells. .
  • the same is true for undercharged cells.
  • the structure of the entire system is simple and low cost, and stable balancing is possible.

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

Abstract

Selon un aspect technique de la présente invention, un dispositif d'équilibrage de cellules de batterie peut comprendre : un module de batterie comprenant une pluralité de cellules de batterie ; un module d'équilibrage permettant de charger, parmi la pluralité de cellules de batterie, au moins une cellule insuffisamment chargée ayant été insuffisamment chargée à une capacité inférieure à une capacité prédéterminée, par utilisation de l'énergie d'au moins une cellule surchargée ayant été surchargée à une capacité supérieure ou égale à une capacité prédéterminée. Le module d'équilibrage peut comprendre un convertisseur de courant continu-courant continu amplifiant l'énergie de la cellule surchargée et fournissant l'énergie amplifiée à la cellule insuffisamment chargée.
PCT/KR2016/013632 2016-10-31 2016-11-24 Dispositif d'équilibrage de cellules de batterie Ceased WO2018079918A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020160143554A KR101906384B1 (ko) 2016-10-31 2016-10-31 배터리 셀 밸런싱 장치
KR10-2016-0143554 2016-10-31

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020059952A1 (fr) * 2018-09-21 2020-03-26 주식회사 다음코리아 Dispositif et procédé d'équilibrage de batterie

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102583291B1 (ko) * 2020-12-31 2023-09-26 한화솔루션 주식회사 에너지 저장 시스템의 배터리 오토 밸런싱 장치 및 방법
KR102453917B1 (ko) * 2022-02-17 2022-10-12 주식회사 크레스트 정전류를 이용한 배터리 밸런싱 장치 및 방법

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011200095A (ja) * 2010-02-26 2011-10-06 Sanyo Electric Co Ltd 電池システム
JP2013021851A (ja) * 2011-07-13 2013-01-31 Toyota Industries Corp セルバランス装置
KR20140121365A (ko) * 2013-04-05 2014-10-15 리니어 테크놀러지 코포레이션 전압 보상형 액티브 셀 밸런싱
KR20150071499A (ko) * 2013-12-18 2015-06-26 주식회사 혜령씨엔티 2차전지의 활성화 제어 장치
JP2016152649A (ja) * 2015-02-16 2016-08-22 ソニー株式会社 電力制御装置、電力制御方法及び電力制御システム

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011200095A (ja) * 2010-02-26 2011-10-06 Sanyo Electric Co Ltd 電池システム
JP2013021851A (ja) * 2011-07-13 2013-01-31 Toyota Industries Corp セルバランス装置
KR20140121365A (ko) * 2013-04-05 2014-10-15 리니어 테크놀러지 코포레이션 전압 보상형 액티브 셀 밸런싱
KR20150071499A (ko) * 2013-12-18 2015-06-26 주식회사 혜령씨엔티 2차전지의 활성화 제어 장치
JP2016152649A (ja) * 2015-02-16 2016-08-22 ソニー株式会社 電力制御装置、電力制御方法及び電力制御システム

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020059952A1 (fr) * 2018-09-21 2020-03-26 주식회사 다음코리아 Dispositif et procédé d'équilibrage de batterie

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KR20180047461A (ko) 2018-05-10
KR101906384B1 (ko) 2018-10-11

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