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WO2013047973A1 - Power supply device for cell balancing using outer battery cells and cell balancing method thereof - Google Patents

Power supply device for cell balancing using outer battery cells and cell balancing method thereof 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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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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French (fr)
Korean (ko)
Inventor
김재성
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SK C&C Co Ltd
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SK C&C Co Ltd
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Publication date
Application filed by SK C&C Co Ltd filed Critical SK C&C Co Ltd
Publication of WO2013047973A1 publication Critical patent/WO2013047973A1/en
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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

Provided are a power supply device for cell balancing using outer battery cells and a cell balancing method thereof. According to one embodiment of the present invention, the power supply balances the cells of an inner battery provided inside a battery pack by using the outer battery cells. Thereby, the invention is capable of reducing unnecessary consumption by cell balancing.

Description

외부 배터리 셀을 이용하여 셀 밸런싱을 수행하는 전원 공급 장치 및 그의 셀 밸런싱 방법Power supply and cell balancing method for performing cell balancing using an external battery cell

본 발명은 전원 공급 장치 및 그의 셀 밸런싱 방법에 관한 것으로, 더욱 상세하게는 배터리 셀들에 충전된 에너지를 공급하되 배터리 셀들에 대한 셀 밸런싱을 제어하는 전원 공급 장치 및 그의 셀 밸런싱 방법에 관한 것이다.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.

도 1은 xEV에 마련되는 전원 공급 장치를 도시한 도면이다. xEV는, HEV(Hybrid Electric Vehicle : 하이브리드 전기 자동차)와 PHEV(Plug-in HEV : 플러그-인 하이브리드 전기 자동차)로 구분될 수 있다.1 is a diagram illustrating a power supply device provided in xEV. The xEV may be classified into a hybrid electric vehicle (HEV) and a plug-in HEV (plug-in hybrid electric vehicle).

도 1에 도시된 바와 같이, xEV의 전원 공급 장치(10)에서, 배터리 팩(11)에 충전된 전원은 차량 모터에 공급되고, 축전지(13)에 충전된 전원은 차량 엔진과 차량 내의 전자장치들에 공급된다. BMS(Battery Management System)(13)는 배터리 팩(11)과 축전지(13)의 충전과 방전을 관리/제어하기 위한 시스템이다.As shown in FIG. 1, in the xEV power supply 10, the power charged in the battery pack 11 is supplied to the vehicle motor, and the power charged in the battery 13 is stored in the vehicle engine and the electronic device in the vehicle. Supplied to the field. 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.

도 2는 EV(Electric Vehicle : 전기 자동차)에 마련되는 전원 공급 장치를 도시한 도면이다. 도 2에 도시된 바와 같이, EV의 전원 공급 장치(20)에서, 배터리 팩(21)에 충전된 전원은 차량 모터에 공급되는 한편, DC/DC 컨버터(25)에서 12V로 다운-컨버팅되어 차량 내의 전자장치들에 공급된다. BMS(23)는 배터리 팩(11)의 충전과 방전을 관리/제어하기 위한 시스템이다.2 is a diagram illustrating a power supply device provided in an electric vehicle (EV). As shown in FIG. 2, in the EV power supply 20, the power charged in the battery pack 21 is supplied to the vehicle motor, while down-converted to 12V in the DC / DC converter 25 so that the vehicle To the electronics within. The BMS 23 is a system for managing / controlling the charging and discharging of the battery pack 11.

도 1과 도 2에 도시된 배터리 팩(11, 21)에는 다수의 배터리 셀들이 마련되어 있는데, 충전과 방전을 거듭하여, 배터리 셀들의 충전 잔량이 균등하지 않은 경우, 충전 잔량이 많은 배터리 셀을 기준으로 만충전 조건이 성립되어 나머지 배터리 셀들에 대해서는 만충전이 이루어지지 않는다.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.

이를 해결하기 위해, BMS(13, 23)는 충전 잔량이 많은 배터리 셀의 에너지를 저항 등을 통해 강제로 소비시켜 배터리 셀들의 충전 잔량을 일치시키는 셀 밸런싱을 수행하게 된다. 셀 밸런싱에 의해, 배터리 팩(20)에 마련된 배터리 셀들의 전압이 균등해지기는 하지만, 이 과정에서 불필요한 에너지 소모가 발생하는 문제가 있다.In order to solve this problem, 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. By 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.

본 발명은 상기와 같은 문제점을 해결하기 위하여 안출된 것으로서, 본 발명의 목적은, 셀 밸런싱에 의한 불필요한 에너지 소모를 줄이기 위한 방안으로, 셀 밸런싱을 위해 추가된 별도의 배터리 셀을 이용하여 셀 밸런싱을 수행하는 방법 및 이를 적용한 전원 공급 장치를 제공함에 있다.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.

상기 목적을 달성하기 위한 본 발명의 일 실시예에 따른, 전원 공급 장치는, 내부 배터리 셀들이 마련된 배터리 팩; 상기 배터리 팩 외부에 마련된 외부 배터리 셀; 및 상기 외부 배터리 셀을 이용하여 상기 내부 배터리 셀들에 대한 셀 밸런싱을 제어하는 관리부;를 포함한다.According to an embodiment of the present invention, 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.

그리고, 본 실시예에 따른 전원 공급 장치는, 상기 내부 배터리 셀들 중 적어도 하나와 상기 외부 배터리 셀 간의 전기적 연결을 스위칭하는 스위칭부;를 더 포함하고, 상기 관리부는, 상기 스위칭부의 스위칭 동작을 제어하여, 상기 외부 배터리 셀을 매개로, 상기 내부 배터리 셀들에 대한 셀 밸런싱을 제어할 수 있다.The power supply apparatus according to the present embodiment 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.

또한, 상기 관리부는, 전압이 가장 높은 내부 배터리 셀로 상기 외부 배터리 셀이 충전되도록 제어할 수 있다.The manager may control the external battery cell to be charged with the internal battery cell having the highest voltage.

그리고, 상기 관리부는, 상기 전압이 가장 높은 내부 배터리 셀의 전압이, 상기 배터리 팩의 평균 전압으로 감소한 경우나, 상기 외부 배터리 셀의 전압과 동일하게 된 경우까지, 상기 전압이 가장 높은 내부 배터리 셀로 상기 외부 배터리 셀이 충전되도록 제어할 수 있다.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.

또한, 상기 관리부는, 상기 외부 배터리 셀로 전압이 가장 낮은 내부 배터리 셀이 충전되도록 제어할 수 있다.The manager may control the internal battery cell to be charged with the lowest voltage to the external battery cell.

그리고, 상기 관리부는, 전압이 가장 낮은 내부 배터리 셀의 전압이, 상기 배터리 팩의 평균 전압으로 증가한 경우나, 상기 외부 배터리 셀의 전압과 동일하게 된 경우까지, 상기 외부 배터리 셀로 전압이 가장 낮은 내부 배터리 셀이 충전되도록 제어할 수 있다.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.

또한, 상기 관리부는, 상기 외부 배터리 셀의 충전 잔량이 기준을 초과하면, 상기 외부 배터리 셀이 전원을 공급할 수 있다.The manager may supply power to the external battery cell when the remaining charge of the external battery cell exceeds a standard.

그리고, 상기 관리부는, 상기 외부 배터리 셀의 충전 잔량이 기준량 이하이면, 상기 내부 배터리 셀들이 전원을 공급할 수 있다.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.

또한, 상기 관리부는, 상기 외부 배터리 셀로 상기 내부 배터리 셀들 중 적어도 하나가 충전되도록 제어할 수 있다.The manager may control at least one of the internal battery cells to be charged by the external battery cell.

그리고, 상기 내부 배터리 셀들 중 적어도 하나는, 상기 내부 배터리 셀들의 평균 전압 미만의 내부 배터리 셀일 수 있다.At least one of the internal battery cells may be an internal battery cell less than an average voltage of the internal battery cells.

또한, 상기 관리부는, 상기 내부 배터리 셀들 중 적어도 하나로 상기 외부 배터리 셀을 충전할 수 있다.The management unit may charge the external battery cell with at least one of the internal battery cells.

그리고, 상기 관리부는, 상기 내부 배터리 셀들 중 적어도 하나는, 상기 내부 배터리 셀들의 평균 전압을 초과하는 내부 배터리 셀일 수 있다.In addition, 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.

한편, 본 발명에 따른, 셀 밸런싱 방법은, 배터리 팩에 마련된 내부 배터리 셀들을 충전하는 단계; 및 상기 배터리 팩 외부에 마련된 외부 배터리 셀을 이용하여, 상기 내부 배터리 셀들에 대한 셀 밸런싱을 제어하는 단계;를 포함한다.On the other hand, the cell balancing method according to the invention, 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.

이상 설명한 바와 같이, 본 발명에 따르면, 셀 밸런싱을 위해 추가된 별도의 배터리 셀을 이용하여 셀 밸런싱을 수행할 수 있게 되어, 셀 밸런싱에 의한 불필요한 에너지 소모를 줄일 수 있게 된다.As described above, according to the present invention, it is possible to perform cell balancing using an additional battery cell added for cell balancing, thereby reducing unnecessary energy consumption due to cell balancing.

또한, 추가된 별도의 배터리 셀은 전자장치들에 필요한 전원 공급에 이용할 수 있으므로, 셀 밸런싱을 위해 마련된 배터리 셀을 다면적으로 활용함으로서, 운용 효율을 극대화하고 에너지 절감에 만전을 기할 수 있게 된다.In addition, since the added additional battery cells can be used to supply power required for electronic devices, the battery cells prepared for cell balancing can be utilized in various ways, thereby maximizing operational efficiency and making full efforts in energy saving.

도 1은 xEV에 마련되는 전원 공급 장치를 도시한 도면,1 is a view showing a power supply provided in xEV,

도 2는 EV에 마련되는 전원 공급 장치를 도시한 도면,2 is a view showing a power supply provided in the EV,

도 3은 본 발명의 일 실시예에 따른 전원 공급 장치의 블럭도,3 is a block diagram of a power supply according to an embodiment of the present invention;

도 4는, 도 3에 도시된 전원 공급 장치의 상세 회로도,4 is a detailed circuit diagram of the power supply device shown in FIG. 3;

도 5는 본 발명의 일 실시예에 따른 셀 밸런싱 방법의 설명에 제공되는 흐름도,5 is a flowchart provided to explain a cell balancing method according to an embodiment of the present invention;

도 6은, 도 5에 도시된 셀 밸런싱 방법의 부연 설명에 제공되는 도면, 그리고,FIG. 6 is a view provided for further explanation of the cell balancing method shown in FIG. 5, and

도 7은, 전자장치 공급 전원을 선택 제어하는 과정의 설명에 제공되는 도면이다.7 is a diagram provided to explain a process of selecting and controlling an electronic device power supply.

이하에서는 도면을 참조하여 본 발명을 보다 상세하게 설명한다.Hereinafter, with reference to the drawings will be described the present invention in more detail.

도 3은 본 발명의 일 실시예에 따른 전원 공급 장치의 블럭도이다. 본 실시예에 따른 전원 공급 장치(100)는 차량용으로, 도 3에 도시된 바와 같이, 공급전원 선택용 스위치(110), DC/DC 업-컨버터(120), DC/DC 다운-컨버터(130), 외부 배터리 셀(140), 셀 밸런싱용 스위치(150), 배터리팩(160) 및 BMS(Battery Management System)(170)를 구비한다.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.

배터리팩(160)에는 다수의 내부 배터리 셀들이 마련되어 있는데, 이 내부 배터리 셀들은 직렬로 연결된 충전가능한 이차 전지들이다. 배터리팩(160)에 마련된 배터리 셀들은 차량모터의 구동전원과 전자장치들에 필요한 전원을 공급하기 위한 에너지 저장 수단으로, PCS(Power Conversion System)(미도시)에 의해 충전된다.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).

여기서, 전자장치들에는, 차량 내에 마련된 전자장치들과 차량 내에 마련된 전원공급 단자를 통해 연결될 수 있는 사용자의 전자장치들이 포함된다.Here, 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.

BMS(170)는 배터리팩(160)에 마련된 내부 배터리 셀들에 대한 셀 밸런싱을 제어하는데, 셀 밸런싱 제어시 외부 배터리 셀(140)과 셀 밸런싱용 스위치(150)을 이용한다. BMS(170)의 제어 하에 수행되는 내부 배터리 셀들의 셀 밸런싱에 대해서는, 도 5와 도 6을 참조하여 상세히 후술한다.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.

외부 배터리 셀(140)은 배터리팩(160) 외부에 마련된 배터리 셀로, 배터리팩(160) 내부에 마련된 내부 배터리 셀들과 구별된다.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.

셀 밸런싱용 스위치(150)는 '배터리팩(160)에 마련된 내부 배터리 셀들 중 하나'와 '외부 배터리 셀(140)' 간의 전기적 연결을 스위칭한다. 즉, 셀 밸런싱용 스위치(150)는 '배터리팩(160)에 마련된 내부 배터리 셀들 중 하나'와 '외부 배터리 셀(140)'가 전기적으로 연결되도록 스위칭하는데, 이때 내부 배터리 셀과 외부 배터리 셀(140)은 병렬로 연결된다.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.

이하에서, 셀 밸런싱용 스위치(150)에 대해 도 4를 참조하여 상세히 설명한다. 도 4는, 도 3에 도시된 전원 공급 장치(100)의 상세 회로도이다.Hereinafter, the cell balancing switch 150 will be described in detail with reference to FIG. 4. 4 is a detailed circuit diagram of the power supply device 100 shown in FIG.

도 4에 도시된 바와 같이, 셀 밸런싱용 스위치(150)는 다수의 스위치들(EXSW 1~2, SW_P 1~N, SW_N 1~N)로 구성되어 있는데, 이 스위치들(EXSW 1~2, SW_P 1~N, SW_N 1~N)은 FET, TR, PhotoMOS Relay 등의 트랜지스터 소자나 릴레이 소자로 구현할 수 있다.As shown in FIG. 4, 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.

BMS(170)는 셀 밸런싱용 스위치(150)의 스위칭 상태를 제어하여, '배터리팩(160)에 마련된 내부 배터리 셀들 중 하나'와 '외부 배터리 셀(140)'이 병렬 연결되도록 할 수 있다.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.

예를 들어, BMS(170)는 'EXSW 2', 'SW_P 5', 'SW_N 4' 및 'EXSW 1'이 스위칭-온 되고 나머지들은 스위칭-오프 되도록 셀 밸런싱용 스위치(150)의 스위칭 상태를 제어하여, 내부 배터리 셀 4(Cell 4)와 '외부 배터리 셀(140)'이 병렬 연결되도록 할 수 있다.For example, 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. By controlling, the internal battery cell 4 and the external battery cell 140 may be connected in parallel.

한편, 도 4에 도시된 바에 따르면, 배터리 팩(160)에는 N개의 내부 배터리 셀들(Cell 1~N)이 마련되어 있음을 확인할 수 있다. 다시, 도 3을 참조하여 설명한다.On the other hand, as shown in Figure 4, it can be seen that the battery pack 160 is provided with N internal battery cells (Cell 1 ~ N). Again, this will be described with reference to FIG. 3.

DC/DC 다운-컨버터(130)는 배터리팩(160)의 고전압을 12V로 다운-컨버팅하고, DC/DC 업-컨버터(120)는 외부 배터리 셀(140)의 저전압(3V ~ 4V)을 12V로 업-컨버팅한다.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.

공급전원 선택용 스위치(110)는 'DC/DC 다운-컨버터(130)에서 출력되는 전원'과 'DC/DC 업-컨버터(120)에서 출력되는 전원' 중 하나가 전자장치들로 공급되도록 스위칭한다.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.

BMS(170)는 공급전원 선택용 스위치(110)의 스위칭 동작을 제어하여, 전자장치들에 공급할 전원의 소스를 제어한다. 즉, BMS(170)는 '배터리팩(160)으로부터 다운-컨버팅한 전원'과 '외부 배터리 셀(140)로부터 업-컨버팅한 전원' 중 하나가 선택적으로 전자장치들에 공급되도록 제어하며, 이에 대해서는 도 7을 참조하여 상세히 후술한다.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.

도 4에 도시된 바와 같이, 공급전원 선택용 스위치(110)는 다수의 스위치들(DCSW 1~4)로 구성되어 있는데, 이 스위치들(DCSW 1~4)도 FET, TR, PhotoMOS Relay 등의 트랜지스터 소자나 릴레이 소자로 구현할 수 있다.As shown in FIG. 4, 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.

BMS(170)에 의해 공급전원 선택용 스위치(110)의 'DCSW 1'과 'DCSW 2'가 스위칭-온 되고 'DCSW 3'과 'DCSW 4'가 스위칭-오프 되면, DC/DC 업-컨버터(120)에서 업-컨버팅된 외부 배터리 셀(140)의 전원이 전자장치들로 공급된다.When 'DCSW 1' and 'DCSW 2' of the power supply selection switch 110 are switched on by the BMS 170 and 'DCSW 3' and 'DCSW 4' are switched off, the DC / DC up-converter The power of the up-converted external battery cell 140 at 120 is supplied to the electronic devices.

반면, BMS(170)에 의해 공급전원 선택용 스위치(110)의 'DCSW 3'과 'DCSW 4'가 스위칭-온 되고 'DCSW 1'과 'DCSW 2'가 스위칭-오프 되면, DC/DC 다운-컨버터(130)에서 다운-컨버팅된 배터리팩(160)의 전원이 전자장치들로 공급된다.On the other hand, when 'DCSW 3' and 'DCSW 4' of the power supply selection switch 110 are switched on by the BMS 170 and 'DCSW 1' and 'DCSW 2' are switched off, the DC / DC down is performed. The power of the battery pack 160 down-converted from the converter 130 is supplied to the electronic devices.

이하에서는, BMS(170)가 셀 밸런싱용 스위치(150)의 스위칭 동작을 제어하면서, 외부 배터리 셀(140)를 매개로, 배터리팩(160)에 마련된 내부 배터리 셀들에 대한 셀 밸런싱을 제어하는 과정에 대해, 도 5를 참조하여 상세히 설명한다.Hereinafter, 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.

도 5는 본 발명의 일 실시예에 따른 셀 밸런싱 방법의 설명에 제공되는 흐름도이다. 도 5에 도시된 바와 같이, 먼저 BMS(170)가 배터리팩(160)에 마련된 내부 배터리 셀들 각각에 대한 전압들을 측정한다(S210).5 is a flowchart provided to explain a cell balancing method according to an embodiment of the present invention. As shown in FIG. 5, first, the BMS 170 measures voltages for each of the internal battery cells provided in the battery pack 160 (S210).

S210단계에서 측정된 전압들이 모두 일치하면(S220-Y), 후속 단계들이 수행되지 않는다. 이 경우는, 내부 배터리 셀들이 셀 밸런싱 완료된 경우이기 때문이다.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.

반면, S210단계에서 측정된 전압들이 모두 일치하지 않으면(S220-N), BMS(170)는 전압이 가장 높은 내부 배터리 셀로 외부 배터리 셀(140)이 충전되도록 제어한다(S230).On the other hand, 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).

구체적으로 S230단계는, BMS(170)가 '배터리팩(160)에 마련된 내부 배터리 셀들 중 전압이 가장 높은 내부 배터리 셀'과 '외부 배터리 셀(140)'이 병렬로 연결되도록, 셀 밸런싱용 스위치(150)의 스위칭 상태를 제어하는 과정에 의한다.Specifically, in the step 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. By the process of controlling the switching state of 150.

S230단계는, 외부 배터리 셀(140)에 병렬로 연결된 내부 배터리 셀의 전압이 평균 전압으로 감소한 경우나(S240-Y), 외부 배터리 셀(140)에 병렬로 연결된 내부 배터리 셀의 전압이 감소하여 외부 배터리 셀(140)과 동일하게 된 경우(S250-Y)까지 계속된다.In 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).

이후, BMS(170)는 외부 배터리 셀(140)로 전압이 가장 낮은 내부 배터리 셀이 충전되도록 제어한다(S260).Thereafter, the BMS 170 controls the internal battery cell having the lowest voltage to be charged to the external battery cell 140 (S260).

구체적으로 S260단계는, BMS(170)가 '배터리팩(160)에 마련된 내부 배터리 셀들 중 전압이 가장 낮은 내부 배터리 셀'과 '외부 배터리 셀(140)'이 병렬로 연결되도록, 셀 밸런싱용 스위치(150)의 스위칭 상태를 제어하는 과정에 의한다.Specifically, in 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. By the process of controlling the switching state of 150.

S260단계는, 외부 배터리 셀(140)에 병렬로 연결된 내부 배터리 셀의 전압이 평균 전압으로 증가한 경우나(S270-Y), 외부 배터리 셀(140)에 병렬로 연결된 내부 배터리 셀의 전압이 증가하여 외부 배터리 셀(140)과 동일하게 된 경우(S280-Y)까지 계속된다.In 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).

도 6은, 도 5에 도시된 셀 밸런싱 방법의 부연 설명에 제공되는 도면이다. 도 6의 좌측/상부에는, 배터리 팩(160)에 마련된 내부 배터리 셀들이 셀 밸런싱 상태가 아니므로, S230단계를 수행하기 위해 전압이 가장 높은 4번째 내부 배터리 셀과 외부 배터리 셀(140)을 병렬로 연결시킨 상태를 도식적으로 나타내었다.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.

그리고, 도 6의 우측/상부에는, S230단계의 수행 결과로 4번째 내부 배터리 셀에 의해 외부 배터리 셀(140)이 충전된 결과를 도식적으로 나타내었다.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.

또한, 도 6의 우측/하부에는, S260단계를 수행하기 위해 전압이 가장 낮은 1번째 내부 배터리 셀과 외부 배터리 셀(140)을 병렬로 연결시킨 상태를 도식적으로 나타내었다.6 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.

그리고, 도 6의 좌측/하부에는, S260단계의 수행 결과로 외부 배터리 셀(140)에 의해 1번째 내부 배터리 셀이 충전된 결과를 도식적으로 나타내었다.6 illustrates a result of charging the first internal battery cell by the external battery cell 140 as a result of performing step S260.

도 5에 도시된 S210단계 내지 S280단계가 반복되면서, 평균 전압 보다 '높은' 내부 배터리 셀들에 충전된 에너지가 평균 전압 보다 '낮은' 내부 배터리 셀들로 이동하게 되는데, 이 에너지 이동은 외부 배터리 셀(140)을 매개로 이루어진다.As 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).

즉, 평균 전압 보다 높은 내부 배터리 셀들에 충전된 에너지는 외부 배터리 셀(140)로 이동된 후에, 외부 배터리 셀(140)에서 평균 전압 보다 낮은 내부 배터리 셀들로 이동하게 되는 것이다.That is, 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.

이하에서는, BMS(170)가 차량 내의 전자장치들에 공급할 전원의 소스를 제어하는 과정에 대해 도 7을 참조하여 상세히 설명한다. 도 7은, 전자장치 공급 전원을 선택 제어하는 과정의 설명에 제공되는 도면이다.Hereinafter, a process of controlling the source of power to be supplied to the electronic devices in the vehicle by the BMS 170 will be described in detail with reference to FIG. 7. 7 is a diagram provided to explain a process of selecting and controlling an electronic device power supply.

도 7에 도시된 바와 같이, 먼저, BMS(170)는 외부 배터리 셀(140)의 전압을 측정하고(S310), 측정된 전압으로 외부 배터리 셀(140)의 충전 잔량을 산출한다(S320).As shown in FIG. 7, first, 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).

S320단계에서 산출된 외부 배터리 셀(140)의 충전 잔량이 40%를 초과하는 것으로 판단되면(S330-Y), BMS(170)는 외부 배터리 셀(140)에서 전자장치 공급 전원이 공급되도록 제어한다(S340).If it is determined that the remaining charge of the external battery cell 140 calculated in step S320 exceeds 40% (S330-Y), the BMS 170 controls to supply the electronic device supply power from the external battery cell 140. (S340).

S340단계는, BMS(170)가 DC/DC 업-컨버터(120)에서 업-컨버팅된 외부 배터리 셀(140)의 전압이 전자장치들로 인가되도록 공급전원 선택용 스위치(110)의 스위칭 동작을 제어하는 과정에 의해 수행된다.In operation 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.

이와 같이, 외부 배터리 셀(140)의 충전 잔량이 충분하다고 판단되는 경우는, 외부 배터리 셀(140)로 전자장치들에 전원을 공급하도록 하여, 외부 배터리 셀(140)에 셀 밸런싱을 위해 필요한 빈 공간이 확보되도록 하였다.As such, when it is determined that the remaining charge of the external battery cell 140 is sufficient, 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.

한편, S320단계에서 산출된 외부 배터리 셀(140)의 충전 잔량이 40% 이하인 것으로 판단되면(S330-N), BMS(170)는 배터리팩(160)에서 전자장치 공급전원이 공급되도록 제어한다(S350).Meanwhile, when it is determined that the remaining charge of the external battery cell 140 calculated in step S320 is 40% or less (S330-N), the BMS 170 controls the electronic device supply power to be supplied from the battery pack 160 ( S350).

S350단계는, BMS(170)가 DC/DC 다운-컨버터(130)에서 다운-컨버팅된 배터리팩(160)의 전압이 전자장치들로 인가되도록 공급전원 선택용 스위치(110)의 스위칭 동작을 제어하는 과정에 의해 수행된다.In 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.

이와 같이, 외부 배터리 셀(140)의 충전 잔량이 충분하지 않다고 판단되는 경우는, 배터리팩(160)으로 전자장치들에 전원을 공급하도록 하였다.As such, when it is determined that the remaining charge of the external battery cell 140 is not sufficient, the battery pack 160 supplies power to the electronic devices.

한편, 전자장치들로 전원을 공급할 소스를 선택하는 기준인 외부 배터리 셀(140)의 충전 잔량의 용량을 "40%"로 상정한 것은 설명의 편의를 위한 예시적인 것으로, 위와 다른 수치가 적용될 수 있다.On the other hand, assuming that 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.

지금까지, 외부 배터리 셀(140)을 이용하여 셀 밸런싱을 수행하는 방법 및 외부 배터리 셀(140)에 충전된 에너지로 전자장치들에 전원을 공급하는 방법에 대해 바람직한 실시예들을 들어 상세히 설명하였다.Up to now, preferred embodiments have been described in detail with respect to a method of performing cell balancing using the external battery cell 140 and a method of supplying power to electronic devices with energy charged in the external battery cell 140.

위 실시예에서, 외부 배터리 셀(140)의 개수는 1개인 것으로 상정하였으나, 이는 설명의 편의를 위한 일 예에 불과한 것으로, 외부 배터리 셀(140)의 개수를 복수로 구현하는 것이 가능하다.In the above embodiment, 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.

또한, 위 실시예에서 외부 배터리 셀(140)과 내부 배터리 셀 1개만이 병렬로 연결되어, 내부 배터리 셀 1개로 외부 배터리 셀(140)이 충전되고, 외부 배터리 셀(140)로 내부 배터리 셀 1개가 충전되는 것을 상정하였으나, 이 역시 설명의 편의를 위한 일 예에 불과하다.In addition, in the above embodiment, only the external battery cell 140 and one internal battery cell are connected in parallel, and the external battery cell 140 is charged with one internal battery cell, and the internal battery cell 1 is connected to the external battery cell 140. It is assumed that the dog is charged, but this is also merely an example for convenience of description.

따라서, 외부 배터리 셀(140)과 다수의 내부 배터리 셀들이 병렬로 연결되어, 다수의 내부 배터리 셀들로 외부 배터리 셀(140)이 충전되고, 외부 배터리 셀(140)로 다수의 내부 배터리 셀들이 충전되도록 구현하는 것이 가능하다.Accordingly, 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.

이때, 외부 배터리 셀(140)을 충전하기 위해 외부 배터리 셀(140)에 연결되는 다수의 내부 배터리 셀들은 배터리팩(160) 평균 전압을 초과하는 내부 배터리 셀들이고, 외부 배터리 셀(140)로 충전하기 위해 외부 배터리 셀(140)에 연결되는 다수의 내부 배터리 셀들은 배터리팩(160) 평균 전압 미만의 내부 배터리 셀들로 설정할 수 있다.In this case, 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.

또한, 위 실시예에서는, 자동차용 전원 공급 장치(100)를 상정하였으나, 이는 설명의 편의를 위한 일 예에 불과하다. 즉, 본 발명의 기술적 사상은, 자동차 이외의 다른 기계장치의 일부를 구성하거나 모바일 PC와 같은 전자장치의 일부를 구성하는 전원 공급 장치에도 적용가능할 뿐만 아니라, '전원 공급 장치' 자체를 구현하는데에도 적용될 수 있다.In addition, in the above embodiment, 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.

한편, 본 실시예에 따른 장치와 방법의 기능을 수행하게 하는 컴퓨터 프로그램을 수록한 컴퓨터로 읽을 수 있는 기록매체에도 본 발명의 기술적 사상이 적용될 수 있음은 물론이다. 또한, 본 발명의 다양한 실시예에 따른 기술적 사상은 컴퓨터로 읽을 수 있는 기록매체에 기록된 컴퓨터로 읽을 수 있는 코드 형태로 구현될 수도 있다. 컴퓨터로 읽을 수 있는 기록매체는 컴퓨터에 의해 읽을 수 있고 데이터를 저장할 수 있는 어떤 데이터 저장 장치이더라도 가능하다. 예를 들어, 컴퓨터로 읽을 수 있는 기록매체는 ROM, RAM, CD-ROM, 자기 테이프, 플로피 디스크, 광디스크, 하드 디스크 드라이브, 등이 될 수 있음은 물론이다. 또한, 컴퓨터로 읽을 수 있는 기록매체에 저장된 컴퓨터로 읽을 수 있는 코드 또는 프로그램은 컴퓨터간에 연결된 네트워크를 통해 전송될 수도 있다. On the other hand, 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. In addition, 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. For example, 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. In addition, the computer-readable code or program stored in the computer-readable recording medium may be transmitted through a network connected between the computers.

또한, 이상에서는 본 발명의 바람직한 실시예에 대하여 도시하고 설명하였지만, 본 발명은 상술한 특정의 실시예에 한정되지 아니하며, 청구범위에서 청구하는 본 발명의 요지를 벗어남이 없이 당해 발명이 속하는 기술분야에서 통상의 지식을 가진자에 의해 다양한 변형실시가 가능한 것은 물론이고, 이러한 변형실시들은 본 발명의 기술적 사상이나 전망으로부터 개별적으로 이해되어져서는 안될 것이다.In addition, although the preferred embodiment of the present invention has been shown and described above, the present invention is not limited to the specific embodiments described above, but the technical field to which the invention belongs without departing from the spirit of the invention claimed in the claims. Of course, various modifications can be made by those skilled in the art, and these modifications should not be individually understood from the technical spirit or the prospect of the present invention.

Claims (13)

내부 배터리 셀들이 마련된 배터리 팩;A battery pack provided with internal battery cells; 상기 배터리 팩 외부에 마련된 외부 배터리 셀; 및An external battery cell provided outside the battery pack; And 상기 외부 배터리 셀을 이용하여 상기 내부 배터리 셀들에 대한 셀 밸런싱을 제어하는 관리부;를 포함하는 것을 특징으로 하는 전원 공급 장치.And a manager configured to control cell balancing of the internal battery cells by using the external battery cell. 제 1항에 있어서,The method of claim 1, 상기 내부 배터리 셀들 중 적어도 하나와 상기 외부 배터리 셀 간의 전기적 연결을 스위칭하는 스위칭부;를 더 포함하고,And a switching unit for switching an electrical connection between at least one of the internal battery cells and the external battery cell. 상기 관리부는,The management unit, 상기 스위칭부의 스위칭 동작을 제어하여, 상기 외부 배터리 셀을 매개로, 상기 내부 배터리 셀들에 대한 셀 밸런싱을 제어하는 것을 특징으로 하는 전원 공급 장치.And controlling cell balancing of the internal battery cells through the external battery cell by controlling a switching operation of the switching unit. 제 1항에 있어서,The method of claim 1, 상기 관리부는,The management unit, 전압이 가장 높은 내부 배터리 셀로 상기 외부 배터리 셀이 충전되도록 제어하는 것을 특징으로 하는 전원 공급 장치.And controlling the external battery cell to be charged with the internal battery cell having the highest voltage. 제 3항에 있어서,The method of claim 3, 상기 관리부는,The management unit, 상기 전압이 가장 높은 내부 배터리 셀의 전압이, 상기 배터리 팩의 평균 전압으로 감소한 경우나, 상기 외부 배터리 셀의 전압과 동일하게 된 경우까지,Until the voltage of the internal battery cell with the highest voltage decreases to the average voltage of the battery pack or becomes equal to the voltage of the external battery cell, 상기 전압이 가장 높은 내부 배터리 셀로 상기 외부 배터리 셀이 충전되도록 제어하는 것을 특징으로 하는 전원 공급 장치.And control the external battery cell to be charged with the internal battery cell having the highest voltage. 제 1항에 있어서,The method of claim 1, 상기 관리부는,The management unit, 상기 외부 배터리 셀로 전압이 가장 낮은 내부 배터리 셀이 충전되도록 제어하는 것을 특징으로 하는 전원 공급 장치.And controlling the external battery cell to charge the internal battery cell having the lowest voltage. 제 5항에 있어서,The method of claim 5, 상기 관리부는,The management unit, 전압이 가장 낮은 내부 배터리 셀의 전압이, 상기 배터리 팩의 평균 전압으로 증가한 경우나, 상기 외부 배터리 셀의 전압과 동일하게 된 경우까지,Until the voltage of the internal battery cell with the lowest voltage increases to the average voltage of the battery pack or becomes equal to the voltage of the external battery cell, 상기 외부 배터리 셀로 전압이 가장 낮은 내부 배터리 셀이 충전되도록 제어하는 것을 특징으로 하는 전원 공급 장치.And controlling the external battery cell to charge the internal battery cell having the lowest voltage. 제 1항에 있어서,The method of claim 1, 상기 관리부는,The management unit, 상기 외부 배터리 셀의 충전 잔량이 기준을 초과하면, 상기 외부 배터리 셀이 전원을 공급하도록 제어하는 것을 특징으로 하는 전원 공급 장치.And when the remaining charge of the external battery cell exceeds a reference, controlling the external battery cell to supply power. 제 7항에 있어서,The method of claim 7, wherein 상기 관리부는,The management unit, 상기 외부 배터리 셀의 충전 잔량이 기준량 이하이면, 상기 내부 배터리 셀들이 전원을 공급하도록 제어하는 것을 특징으로 하는 전원 공급 장치.And when the remaining charge of the external battery cell is equal to or less than a reference amount, controlling the internal battery cells to supply power. 제 1항에 있어서,The method of claim 1, 상기 관리부는,The management unit, 상기 외부 배터리 셀로 상기 내부 배터리 셀들 중 적어도 하나가 충전되도록 제어하는 것을 특징으로 하는 전원 공급 장치.And at least one of the internal battery cells is charged by the external battery cell. 제 9항에 있어서,The method of claim 9, 상기 내부 배터리 셀들 중 적어도 하나는,At least one of the internal battery cells, 상기 내부 배터리 셀들의 평균 전압 미만의 내부 배터리 셀인 것을 특징으로 하는 전원 공급 장치.And an internal battery cell that is less than the average voltage of the internal battery cells. 제 1항에 있어서,The method of claim 1, 상기 관리부는,The management unit, 상기 내부 배터리 셀들 중 적어도 하나로 상기 외부 배터리 셀을 충전하는 것을 특징으로 하는 전원 공급 장치.And supply the external battery cell with at least one of the internal battery cells. 제 11항에 있어서,The method of claim 11, 상기 관리부는,The management unit, 상기 내부 배터리 셀들 중 적어도 하나는,At least one of the internal battery cells, 상기 내부 배터리 셀들의 평균 전압을 초과하는 내부 배터리 셀인 것을 특징으로 하는 전원 공급 장치.And an internal battery cell exceeding an average voltage of the internal battery cells. 배터리 팩에 마련된 내부 배터리 셀들을 충전하는 단계; 및Charging internal battery cells provided in the battery pack; And 상기 배터리 팩 외부에 마련된 외부 배터리 셀을 이용하여, 상기 내부 배터리 셀들에 대한 셀 밸런싱을 제어하는 단계;를 포함하는 것을 특징으로 하는 셀 밸런싱 방법.And controlling cell balancing of the internal battery cells using an external battery cell provided outside the battery pack.
PCT/KR2012/003935 2011-09-29 2012-05-18 Power supply device for cell balancing using outer battery cells and cell balancing method thereof Ceased WO2013047973A1 (en)

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