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WO2013047973A1 - Dispositif d'alimentation pour équilibrage de cellules utilisant des cellules de batterie externes et son procédé d'équilibrage de cellules - Google Patents

Dispositif d'alimentation pour équilibrage de cellules utilisant des cellules de batterie externes et son procédé d'équilibrage de cellules Download PDF

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Publication number
WO2013047973A1
WO2013047973A1 PCT/KR2012/003935 KR2012003935W WO2013047973A1 WO 2013047973 A1 WO2013047973 A1 WO 2013047973A1 KR 2012003935 W KR2012003935 W KR 2012003935W WO 2013047973 A1 WO2013047973 A1 WO 2013047973A1
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WO
WIPO (PCT)
Prior art keywords
battery cell
cell
internal battery
battery cells
external
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/KR2012/003935
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English (en)
Korean (ko)
Inventor
김재성
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.)
SK C&C Co Ltd
Original Assignee
SK C&C Co Ltd
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 SK C&C Co Ltd filed Critical SK C&C Co Ltd
Publication of WO2013047973A1 publication Critical patent/WO2013047973A1/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—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
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H02J7/0014—Circuits for equalisation of charge between 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
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from AC mains by converters
    • H02J7/04—Regulation of charging current or voltage
    • 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
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • 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
    • 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 power supply device and a cell balancing method thereof, and more particularly, to a power supply device and a cell balancing method thereof for supplying charged energy to the battery cells while controlling the cell balancing for the battery cells.
  • the xEV may be classified into a hybrid electric vehicle (HEV) and a plug-in HEV (plug-in hybrid electric vehicle).
  • HEV hybrid electric vehicle
  • plug-in hybrid electric vehicle plug-in hybrid electric vehicle
  • the battery management system (BMS) 13 is a system for managing / controlling the charging and discharging of the battery pack 11 and the storage battery 13.
  • the BMS 23 is a system for managing / controlling the charging and discharging of the battery pack 11.
  • the battery packs 11 and 21 illustrated in FIGS. 1 and 2 are provided with a plurality of battery cells. When the charging and discharging cycles are repeated, the battery packs 11 and 21 are not equal to each other. As the full charge condition is established, the full charge is not performed for the remaining battery cells.
  • the BMSs 13 and 23 forcibly consume energy of battery cells having a large amount of charge through a resistor or the like to perform cell balancing that matches the remaining amount of charge of the battery cells.
  • cell balancing the voltages of the battery cells provided in the battery pack 20 are equalized, but there is a problem that unnecessary energy consumption occurs in this process.
  • the present invention has been made to solve the above problems, and an object of the present invention is to reduce unnecessary energy consumption by cell balancing, and to perform cell balancing using an additional battery cell added for cell balancing. To provide a method and a power supply device applying the same.
  • a power supply device includes: a battery pack provided with internal battery cells; An external battery cell provided outside the battery pack; And a manager configured to control cell balancing of the internal battery cells by using the external battery cell.
  • the power supply apparatus may further include a switching unit for switching an electrical connection between at least one of the internal battery cells and the external battery cell, wherein the management unit controls the switching operation of the switching unit.
  • Cell balancing for the internal battery cells may be controlled through the external battery cell.
  • the manager may control the external battery cell to be charged with the internal battery cell having the highest voltage.
  • the management unit may be configured as the internal battery cell having the highest voltage until the voltage of the internal battery cell having the highest voltage decreases to an average voltage of the battery pack or becomes equal to the voltage of the external battery cell.
  • the external battery cell may be controlled to be charged.
  • the manager may control the internal battery cell to be charged with the lowest voltage to the external battery cell.
  • the manager may further include an internal battery having the lowest voltage to the external battery cell until the voltage of the internal battery cell having the lowest voltage increases to an average voltage of the battery pack or becomes equal to the voltage of the external battery cell.
  • the battery cell may be controlled to be charged.
  • the manager may supply power to the external battery cell when the remaining charge of the external battery cell exceeds a standard.
  • the management unit may supply power to the internal battery cells when the remaining charge of the external battery cell is less than or equal to a reference amount.
  • the manager may control at least one of the internal battery cells to be charged by the external battery cell.
  • At least one of the internal battery cells may be an internal battery cell less than an average voltage of the internal battery cells.
  • the management unit may charge the external battery cell with at least one of the internal battery cells.
  • the management unit at least one of the internal battery cells, may be an internal battery cell that exceeds the average voltage of the internal battery cells.
  • the cell balancing method the step of charging the internal battery cells provided in the battery pack; And controlling cell balancing of the internal battery cells by using an external battery cell provided outside the battery pack.
  • the battery cells prepared for cell balancing can be utilized in various ways, thereby maximizing operational efficiency and making full efforts in energy saving.
  • FIG. 1 is a view showing a power supply provided in xEV
  • FIG. 2 is a view showing a power supply provided in the EV
  • FIG. 3 is a block diagram of a power supply according to an embodiment of the present invention.
  • FIG. 4 is a detailed circuit diagram of the power supply device shown in FIG. 3;
  • FIG. 5 is a flowchart provided to explain a cell balancing method according to an embodiment of the present invention.
  • FIG. 6 is a view provided for further explanation of the cell balancing method shown in FIG. 5, and
  • FIG. 7 is a diagram provided to explain a process of selecting and controlling an electronic device power supply.
  • FIG. 3 is a block diagram of a power supply apparatus according to an embodiment of the present invention.
  • the power supply device 100 according to the present embodiment is for a vehicle, as shown in FIG. 3, the power supply selection switch 110, the DC / DC up-converter 120, and the DC / DC down-converter 130. ), An external battery cell 140, a cell balancing switch 150, a battery pack 160, and a battery management system (BMS) 170.
  • BMS battery management system
  • the battery pack 160 includes a plurality of internal battery cells, which are rechargeable secondary batteries connected in series.
  • the battery cells provided in the battery pack 160 are energy storage means for supplying power required for driving power and electronic devices of the vehicle motor, and are charged by a power conversion system (PCS) (not shown).
  • PCS power conversion system
  • the electronic devices include electronic devices provided in a vehicle and electronic devices of a user that can be connected through a power supply terminal provided in the vehicle.
  • the BMS 170 controls cell balancing of internal battery cells provided in the battery pack 160, and uses the external battery cell 140 and the cell balancing switch 150 when controlling the cell balancing. Cell balancing of internal battery cells performed under the control of the BMS 170 will be described later in detail with reference to FIGS. 5 and 6.
  • the external battery cell 140 is a battery cell provided outside the battery pack 160, and is distinguished from internal battery cells provided in the battery pack 160.
  • the cell balancing switch 150 switches an electrical connection between 'one of the internal battery cells provided in the battery pack 160' and the 'external battery cell 140'. That is, the cell balancing switch 150 switches so that 'one of the internal battery cells provided in the battery pack 160' and the 'external battery cell 140' are electrically connected to each other. In this case, the internal battery cell and the external battery cell ( 140 are connected in parallel.
  • FIG. 4 is a detailed circuit diagram of the power supply device 100 shown in FIG.
  • the cell balancing switch 150 includes a plurality of switches EXSW 1 to 2, SW_P 1 to N, and SW_N 1 to N. These switches EXSW 1 to 2, SW_P 1 ⁇ N, SW_N 1 ⁇ N) can be implemented as a transistor device or relay device such as FET, TR, PhotoMOS Relay.
  • the BMS 170 may control the switching state of the cell balancing switch 150 so that 'one of the internal battery cells provided in the battery pack 160' and the 'external battery cell 140' may be connected in parallel.
  • the BMS 170 switches the switching state of the cell balancing switch 150 such that 'EXSW 2', 'SW_P 5', 'SW_N 4', and 'EXSW 1' are switched on and the others are switched off.
  • the internal battery cell 4 and the external battery cell 140 may be connected in parallel.
  • the battery pack 160 is provided with N internal battery cells (Cell 1 ⁇ N). Again, this will be described with reference to FIG. 3.
  • the DC / DC down-converter 130 down-converts the high voltage of the battery pack 160 to 12V, and the DC / DC up-converter 120 changes the low voltage (3V to 4V) of the external battery cell 140 to 12V. Up-convert to.
  • the switch 110 for selecting a power supply switches so that one of 'power output from the DC / DC down-converter 130' and 'power output from the DC / DC up-converter 120' is supplied to the electronic devices. do.
  • the BMS 170 controls the switching operation of the power source selection switch 110 to control the source of power to be supplied to the electronic devices. That is, the BMS 170 controls to selectively supply one of 'power down-converted from the battery pack 160' and 'power up-converted from the external battery cell 140' to the electronic devices. This will be described later in detail with reference to FIG. 7.
  • the switch 110 for selecting a power supply is composed of a plurality of switches DCSW 1 to 4, and these switches DCSW 1 to 4 are also connected to the FET, TR, PhotoMOS Relay, and the like. It can be implemented as a transistor device or a relay device.
  • the BMS 170 controls the cell balancing of the internal battery cells provided in the battery pack 160 via the external battery cell 140 while controlling the switching operation of the cell balancing switch 150. This will be described in detail with reference to FIG. 5.
  • the BMS 170 measures voltages for each of the internal battery cells provided in the battery pack 160 (S210).
  • step S210 If the voltages measured in step S210 all match (S220-Y), subsequent steps are not performed. This is because the internal battery cells have completed cell balancing.
  • step S210 determines whether the voltages measured in step S210 do not all match (S220-N). If the voltages measured in step S210 do not all match (S220-N), the BMS 170 controls the external battery cell 140 to be charged with the internal battery cell with the highest voltage (S230).
  • the cell balancing switch so that the BMS 170 is connected to the 'internal battery cell having the highest voltage among the internal battery cells provided in the battery pack 160' and the 'external battery cell 140' in parallel.
  • step S230 when the voltage of the internal battery cells connected in parallel to the external battery cells 140 decreases to an average voltage (S240 -Y), or the voltage of the internal battery cells connected in parallel to the external battery cells 140 decreases. It continues until the same as the external battery cell 140 (S250-Y).
  • the BMS 170 controls the internal battery cell having the lowest voltage to be charged to the external battery cell 140 (S260).
  • step S260 the cell balancing switch so that the BMS 170 is connected to the 'internal battery cell having the lowest voltage among the internal battery cells provided in the battery pack 160' and the 'external battery cell 140' in parallel.
  • step S260 when the voltage of the internal battery cells connected in parallel to the external battery cells 140 increases to an average voltage (S270 -Y), or the voltage of the internal battery cells connected in parallel to the external battery cells 140 increases. It continues until the same as the external battery cell 140 (S280-Y).
  • FIG. 6 is a diagram provided to further explain the cell balancing method illustrated in FIG. 5. 6, since the internal battery cells provided in the battery pack 160 are not in a cell balancing state, the fourth internal battery cell having the highest voltage and the external battery cell 140 are performed in parallel to perform step S230. The state connected with is shown schematically.
  • FIG. 6 illustrates a result of the external battery cell 140 being charged by the fourth internal battery cell as a result of the step S230.
  • step S260 illustrates a state in which the first internal battery cell having the lowest voltage and the external battery cell 140 are connected in parallel in order to perform step S260.
  • FIG. 6 illustrates a result of charging the first internal battery cell by the external battery cell 140 as a result of performing step S260.
  • steps S210 to S280 shown in FIG. 5 are repeated, the energy charged in the internal battery cells that are 'higher' than the average voltage is transferred to the internal battery cells that are 'lower than the average voltage'. 140).
  • the energy charged in the internal battery cells higher than the average voltage is transferred to the external battery cell 140, and then moves from the external battery cell 140 to the internal battery cells lower than the average voltage.
  • FIG. 7 is a diagram provided to explain a process of selecting and controlling an electronic device power supply.
  • the BMS 170 measures the voltage of the external battery cell 140 (S310), and calculates the remaining charge of the external battery cell 140 using the measured voltage (S320).
  • the BMS 170 controls to supply the electronic device supply power from the external battery cell 140. (S340).
  • the BMS 170 performs a switching operation of the power supply selection switch 110 so that the voltage of the external battery cell 140 up-converted from the DC / DC up-converter 120 is applied to the electronic devices. By the process of controlling.
  • the external battery cell 140 is supplied with power to the electronic devices, and the bin necessary for cell balancing is provided to the external battery cell 140. Space was secured.
  • the BMS 170 controls the electronic device supply power to be supplied from the battery pack 160 ( S350).
  • step S350 the BMS 170 controls the switching operation of the power supply selection switch 110 so that the voltage of the battery pack 160 down-converted from the DC / DC down-converter 130 is applied to the electronic devices. It is done by the process.
  • the battery pack 160 supplies power to the electronic devices.
  • the capacity of the charge remaining amount of the external battery cell 140 which is a criterion for selecting a source for supplying power to the electronic devices, as “40%” is an example for convenience of description, and a different value from the above may be applied. have.
  • the number of external battery cells 140 is assumed to be one, but this is only an example for convenience of description, and it is possible to implement a plurality of external battery cells 140.
  • the external battery cell 140 and the plurality of internal battery cells are connected in parallel, and the external battery cell 140 is charged with the plurality of internal battery cells, and the plurality of internal battery cells are charged with the external battery cell 140. It is possible to implement as possible.
  • the plurality of internal battery cells connected to the external battery cell 140 to charge the external battery cell 140 are internal battery cells exceeding the average voltage of the battery pack 160 and are charged with the external battery cell 140.
  • the plurality of internal battery cells connected to the external battery cell 140 may be set to internal battery cells less than the average voltage of the battery pack 160.
  • the automotive power supply device 100 is assumed, but this is only an example for convenience of description. That is, the technical idea of the present invention is not only applicable to a power supply device that constitutes a part of a mechanical device other than an automobile or a part of an electronic device such as a mobile PC, but also to implement a 'power supply device' itself. Can be applied.
  • the technical idea of the present invention can be applied to a computer-readable recording medium containing a computer program for performing the functions of the apparatus and method according to the present embodiment.
  • the technical idea according to various embodiments of the present disclosure may be implemented in the form of computer readable codes recorded on a computer readable recording medium.
  • the computer-readable recording medium can be any data storage device that can be read by a computer and can store data.
  • the computer-readable recording medium may be a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, an optical disk, a hard disk drive, or the like.
  • the computer-readable code or program stored in the computer-readable recording medium may be transmitted through a network connected between the computers.

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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)

Abstract

L'invention porte sur un dispositif d'alimentation pour l'équilibrage de cellules, lequel dispositif utilise des cellules de batterie, et sur son procédé d'équilibrage de cellules. Selon un mode de réalisation de la présente invention, l'alimentation équilibre les cellules d'une batterie interne disposée à l'intérieur d'un bloc-batterie par l'utilisation des cellules de batterie externes. Par conséquent, l'invention est apte à réduire la consommation inutile par un équilibrage de cellules.
PCT/KR2012/003935 2011-09-29 2012-05-18 Dispositif d'alimentation pour équilibrage de cellules utilisant des cellules de batterie externes et son procédé d'équilibrage de cellules Ceased WO2013047973A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020110098965A KR101241489B1 (ko) 2011-09-29 2011-09-29 외부 배터리 셀을 이용하여 셀 밸런싱을 수행하는 전원 공급 장치 및 그의 셀 밸런싱 방법
KR10-2011-0098965 2011-09-29

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WO2013047973A1 true WO2013047973A1 (fr) 2013-04-04

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PCT/KR2012/003935 Ceased WO2013047973A1 (fr) 2011-09-29 2012-05-18 Dispositif d'alimentation pour équilibrage de cellules utilisant des cellules de batterie externes et son procédé d'équilibrage de cellules

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WO (1) WO2013047973A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2806525A2 (fr) * 2013-05-23 2014-11-26 Samsung SDI Co., Ltd. Système de gestion de batterie
JP2019502350A (ja) * 2016-10-21 2019-01-24 エルジー・ケム・リミテッド 充電電圧の供給装置及び供給方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180047896A (ko) * 2016-11-01 2018-05-10 한국과학기술연구원 전기차량 구동용 외장 배터리 팩 및 이의 사용방법
US10391864B2 (en) 2017-02-08 2019-08-27 Toyota Motor Engineering & Manufacturing North America, Inc. System to balance high voltage battery for vehicle
CN109786866B (zh) * 2018-11-23 2024-09-10 北京天势新能源技术有限公司 一种即插即用电池模块及电池储能系统

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10285818A (ja) * 1997-03-28 1998-10-23 Nissan Motor Co Ltd 組電池の充放電制御装置
KR100815431B1 (ko) * 2006-12-19 2008-03-20 넥스콘 테크놀러지 주식회사 하이브리드 전기자동차 배터리 셀의 균등 에너지 백업장치
JP2010004679A (ja) * 2008-06-20 2010-01-07 Takeuchi Seisakusho:Kk 充電システム
KR20110001205U (ko) * 2009-07-28 2011-02-08 주식회사 이아이지 복수의 이차 전지에 있어서 전압 균등화 회로

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10285818A (ja) * 1997-03-28 1998-10-23 Nissan Motor Co Ltd 組電池の充放電制御装置
KR100815431B1 (ko) * 2006-12-19 2008-03-20 넥스콘 테크놀러지 주식회사 하이브리드 전기자동차 배터리 셀의 균등 에너지 백업장치
JP2010004679A (ja) * 2008-06-20 2010-01-07 Takeuchi Seisakusho:Kk 充電システム
KR20110001205U (ko) * 2009-07-28 2011-02-08 주식회사 이아이지 복수의 이차 전지에 있어서 전압 균등화 회로

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2806525A2 (fr) * 2013-05-23 2014-11-26 Samsung SDI Co., Ltd. Système de gestion de batterie
JP2019502350A (ja) * 2016-10-21 2019-01-24 エルジー・ケム・リミテッド 充電電圧の供給装置及び供給方法
EP3393000A4 (fr) * 2016-10-21 2019-01-30 LG Chem, Ltd. Appareil d'alimentation en tension de charge et procédé d'alimentation
US10811887B2 (en) 2016-10-21 2020-10-20 Lg Chem, Ltd. Charging voltage supply apparatus and supply method

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