WO2013035963A1 - Battery charging device adaptively varying charging voltage and method for controlling battery charging thereof - Google Patents

Battery charging device adaptively varying charging voltage and method for controlling battery charging thereof Download PDF

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Publication number
WO2013035963A1
WO2013035963A1 PCT/KR2012/003968 KR2012003968W WO2013035963A1 WO 2013035963 A1 WO2013035963 A1 WO 2013035963A1 KR 2012003968 W KR2012003968 W KR 2012003968W WO 2013035963 A1 WO2013035963 A1 WO 2013035963A1
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Prior art keywords
battery cells
charging
voltage
battery
unit
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PCT/KR2012/003968
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French (fr)
Korean (ko)
Inventor
김재성
여상구
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에스케이씨앤씨 주식회사
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Publication of WO2013035963A1 publication Critical patent/WO2013035963A1/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—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
    • H01M10/441—Methods for charging or discharging 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
    • H01M10/46—Accumulators structurally combined with charging apparatus
    • 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
    • H02J7/0016—Circuits for equalisation of charge between batteries using shunting, discharge or bypass circuits
    • 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
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte 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
    • H01M10/425—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 invention relates to a battery charging apparatus and a battery charging control method thereof, and more particularly, to a device for charging a battery pack consisting of a plurality of battery cells and a battery charging control method thereof.
  • the battery pack is provided with a plurality of battery cells. If the battery cells are repeatedly charged and discharged, and the remaining charge level of the battery cells is not even, a full charge condition is established based on the battery cells with a large charge remaining level, and the remaining battery cells are fully charged. No transition is made.
  • a conventional battery charger includes a power conversion system (PCS) 10, a battery pack 20, a cell balancing module 30, and a battery management system (BMS) 40. .
  • PCS power conversion system
  • BMS battery management system
  • the PCS 10 charges all the battery cells provided in the battery pack 20 with the charging power of the same voltage according to the configuration of the battery pack 20.
  • the cell balancing module 30 performs cell balancing on the battery pack 20 under the control of the BMS 40.
  • Cell balancing is a process in which the BMS 40 measures the voltages of the battery cells and matches the voltages of the battery cells with the lowest voltage among the measured voltages. To this end, the switches Q1 to QN connected to the remaining battery cells other than the battery cell having the lowest voltage are switched on to consume power charged through the resistors R1 to RN.
  • 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, to supply charging power to only selected battery cells,
  • the present invention provides a battery charging device for adaptively controlling the charging voltage based on the number and a battery charging control method thereof.
  • the charging unit for supplying charging power to the battery cells provided in the battery pack;
  • a switching unit for switching an electrical connection between the battery cells and the charging unit; And controlling a switching operation of the switching unit such that only the battery cells selected based on the voltages of the battery cells are supplied with the charging power, and controlling the voltage of the charging power supplied by the charging unit based on the number of the selected battery cells. It includes a management unit.
  • the manager may calculate an average voltage of the battery cells and select only battery cells less than the calculated average voltage.
  • the switching unit may perform a switching operation so that the unselected battery cells are bypassed so that the unselected battery cells are not supplied with the charging power.
  • the management unit controls the charging unit to increase the voltage of the charging power when the number of the selected battery cells increases, and the charging unit to decrease the voltage of the charging power when the number of the selected battery cells decreases. Can be controlled.
  • the battery cells may be connected in series, and the manager may control the voltage of the charging power to be proportional to the number of the selected battery cells.
  • the management unit may control the switching operation of the switching unit and the charging power supplied by the charging unit in real time or periodically.
  • the management unit controls a switching operation of the switching unit so that all battery cells are supplied with charging power, and the charging unit supplies charging power of a normal charging voltage. Can be controlled.
  • a battery charge control method measuring the voltage of the plurality of battery cells provided in the battery pack; Selecting some battery cells based on the voltages measured in the measuring step; Switching so that charging power is supplied to the battery cells selected in the sorting step; And controlling the voltage of the charging power source based on the number of the selected battery cells.
  • the average voltage of the battery cells may be calculated and only battery cells below the calculated average voltage may be selected.
  • the controlling may include: increasing the voltage of the charging power source when the number of the selected battery cells increases; And reducing the voltage of the charging power source when the number of the selected battery cells decreases.
  • the charging power is supplied only to the selected battery cells, and the charging voltage is controlled based on the number of the selected battery cells, thereby reducing unnecessary energy consumption due to cell balancing.
  • FIG. 1 is a view showing a conventional battery charging device
  • FIG. 2 is a block diagram of a battery charging apparatus according to an embodiment of the present invention.
  • FIG. 3 is a view showing in detail the battery charging device shown in Figure 2, and
  • FIG. 4 is a flowchart provided to explain a battery charge control method according to another embodiment of the present invention.
  • the battery charging device 100 may be implemented as a 'charging device', as well as a 'part of a mechanical device' such as a car or a 'part of an electronic device' such as a mobile PC. It can be implemented to
  • the battery charger 100 performs separate charging for the battery cells.
  • the battery charger 100 that performs such a function includes a power conversion system (PCS) 110, a switching unit 120, a battery pack 130, and a battery management system (BMS). 140.
  • PCS power conversion system
  • BMS battery management system
  • the battery pack 130 is provided with a plurality of battery cells, which are rechargeable secondary batteries connected in series.
  • the PCS 110 may include a charging function for supplying charging power for charging the battery cells provided in the battery pack 130, and for supplying the charged power to the other module / elements (not shown). Perform the power supply function.
  • the charging power supplied from the PCS 110 to the battery pack 130 has various voltages, and the charging voltage is controlled by the BMS 140 which will be described later.
  • the switching unit 120 switches an electrical connection between the 'PCS 110' and the 'battery cells provided in the battery pack 130'. That is, the switching unit 120 switches so that all or some of the battery cells are electrically connected to or disconnected from the PCS 110.
  • the BMS 140 controls the PCS 110 and the switching unit 120 to evenly charge the battery cells provided in the battery pack 130 without cell balancing. To this end, the BMS 140 performs separate charging based on the state of charge of the battery cells, which will be described later in detail with reference to FIG. 4.
  • FIG. 3 is a view illustrating the battery charger 100 shown in FIG. 2 in more detail.
  • Switching unit 120 is composed of a plurality of switches (SW 1 ⁇ 13, BSW 1 ⁇ 5), these switches (SW 1 ⁇ 13, BSW 1 ⁇ 5) are transistor elements such as FET, TR, PhotoMOS Relay or relay elements Can be implemented as:
  • the switching unit 120 may bypass some of the battery cells through the switching control of the plurality of switches (SW1 ⁇ 13, BSW 1 ⁇ 5). That is, the plurality of switches SW1 to 13 and BSW1 to 5 are arranged to connect at least two or more of the battery cells in series. For example, when charging the remaining four battery cells except the battery cell among the five battery cells, the switching unit 120 controls the on-off state of the plurality of switches (SW1 ⁇ 13, BSW 1 ⁇ 5) In addition, four battery cells except the center battery cell are connected to each other in series.
  • Bypassed battery cells may not receive charging power from the PCS 110. In other words, only battery cells that are not bypassed may receive charging power from the PCS 110.
  • the BMS 140 may include a cell voltage measuring unit 141, a central control unit 142, a switching control unit 143, and a communication unit 144.
  • the cell voltage measuring unit 141 calculates differences of voltages detected through the ports, respectively, and measures voltages of the battery cells BC 1 to 5.
  • the central controller 142 Based on the voltages of the battery cells BC 1 to 5 measured by the cell voltage measuring unit 141, the central controller 142 selects battery cells to be charged.
  • the central control unit 142 transmits a switching control signal to the switching unit 120 through the switching control unit 143 which directly controls the switching operations of the switches SW1 to 1 and BSW1 to 5. Control the cells to bypass.
  • the central control unit 142 transmits a charge voltage control signal to the PCS 110 through the communication unit 144, so that the charging power having a voltage suitable for charging the selected battery cells is output from the PCS 110. do.
  • the cell voltage measuring unit 141 measures the voltages of the battery cells BC 1 to 5 (S210).
  • the central controller 142 calculates an average of the voltages measured in step S210, and calculates an average voltage of the battery cells BC 1 to 5 (S230). Thereafter, the central controller 142 selects battery cells less than the average voltage (S240).
  • the central controller 142 controls the switching unit 120 through the switching controller 143 to charge only the battery cells selected in operation S240 (S250).
  • the central controller 142 determines the charging voltage of the PCS 110 based on the number of battery cells selected in step S240, and transmits the charging voltage control signal of the PCS 110 through the communication unit 144.
  • the charging voltage is controlled to be output from the PCS 110 (S260).
  • step S270 separate charging is performed only for the battery cells selected in step S240 (S270).
  • step S240 when “BC2 and BC5" of the battery cells BC1 to 5 is less than the average voltage, "BC2 and BC5" are selected in step S240. And, in step S250, BC1, BC3 and BC4 are bypassed, but the switching unit 120 switches so that BC2 and BC5 are not bypassed, so that only "BC2 and BC5" among the battery cells BC1 to 5 are PCS 110.
  • the charging power is applied from the
  • a charging voltage suitable for charging one battery cell V 1 2) a charging voltage suitable for charging two battery cells V 2 , 3) a charging voltage suitable for charging three battery cells V 3 , 4) Assume a charging voltage suitable for charging four battery cells V 4 , and 5) A charging voltage suitable for charging five battery cells is V 5 .
  • step S260 the PCS 110 is controlled to output "V 2 ", which is a charging voltage suitable for charging the two battery cells BC2 and BC5.
  • the charging voltages output from the PCS 110 have a relationship of "V 1 > V 2 > V 3 > V 4 > V 5 ".
  • the charging voltages output from the PCS 110 are proportional to the number of battery cells to be charged.
  • step S270 is performed again from step S210.
  • the battery cell separation charging by the battery cell voltage measurement, the switching control, and the charge voltage control, which is performed through steps S210 to S270, may be implemented as being continuously performed in real time, but at a specific cycle (for example, every minute). May be performed intermittently.
  • step S230 the type and number of battery cells selected through step S230 may be changed.
  • Changing the type of the battery cells causes a change in the switching operation of the switching unit 120 in step S250.
  • the change in the number of battery cells causes a change in the charging voltage output from the PCS 110 in operation S260. Specifically, when the number of selected battery cells increases, the charging voltage increases, and when the number of selected battery cells decreases, the charging voltage decreases.
  • step S210 if the steps S210 to S270 is repeated, and the voltages measured in step S210 are all matched (S220-Y), the central control unit 142 controls all battery cells BC1 to 5 to be charged at the normal charging voltage. (S280).
  • the central control unit 142 controls the switching unit 120 through the switching control unit 143 so that all the battery cells BC1 to 5 are charged. Is switched on 'and' switches off other switches'.
  • step S220 The coincidence of all voltages in step S220 does not require a perfect match, and allows a slight deviation. That is, when the voltages of the battery cells in step S210 are included in the allowable voltage range, all of the voltages may be treated as identical in step S220.
  • the battery cells provided in the battery pack 130 are all connected in series, but this is merely an example for convenience of description. Even when the battery cells are connected in a serial / parallel mixture, the technical idea of the present invention may be applied.
  • the charging voltage is proportional to the number of battery cells to be charged. It is assumed that the battery cells are connected in series. If the connection structure of the battery cells is modified, the charging voltage is not necessarily proportional to the number of battery cells to be charged. It should be noted that it may be.
  • the arrangement / connection structure of the switches (SW1 ⁇ BS, BSW 1 ⁇ 5) constituting the switching unit 120 is also merely an example for convenience of explanation, the arrangement / structure presented is changeable.
  • the battery cells to be separated and charged are selected by measuring the voltages of the battery cells, but it is also possible to select the battery cells to be separately charged based on other parameters such as current or power amount, not the voltage of the battery cells. Of course.
  • 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)
  • 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)
  • Secondary Cells (AREA)

Abstract

Provided are a battery charging device which adaptively varies charging voltage and a method for controlling battery charging thereof. The battery charging device controls switching action of a switching unit to supply charging power to selected battery cells based on voltage of the battery cells, and controls voltage of the charging power supplied from a charging unit based on the number of the selected battery cells. Accordingly, the invention removes unnecessary energy consumption by cell balancing and reduces charging time.

Description

충전 전압을 적응적으로 가변시키는 배터리 충전 장치 및 그의 배터리 충전 제어방법Battery charging device for adaptively varying charging voltage and battery charging control method thereof
본 발명은 배터리 충전 장치 및 그의 배터리 충전 제어방법에 관한 것으로, 더욱 상세하게는 다수의 배터리 셀들로 구성되는 배터리 팩을 충전하는 장치 및 그의 배터리 충전 제어방법에 관한 것이다.The present invention relates to a battery charging apparatus and a battery charging control method thereof, and more particularly, to a device for charging a battery pack consisting of a plurality of battery cells and a battery charging control method thereof.
배터리 팩에는 다수의 배터리 셀들이 마련되어 있는데, 충전과 방전을 거듭하여, 배터리 셀들의 충전잔량이 균등하지 않은 경우, 충전잔량이 많은 배터리 셀을 기준으로 만충전 조건이 성립되어 나머지 배터리 셀들에 대해서는 만충전이 이루어지지 않는다.The battery pack is provided with a plurality of battery cells. If the battery cells are repeatedly charged and discharged, and the remaining charge level of the battery cells is not even, a full charge condition is established based on the battery cells with a large charge remaining level, and the remaining battery cells are fully charged. No transition is made.
이를 해결하기 위해, 충전잔량이 많은 배터리 셀의 전력을 강제로 소비시켜 배터리 셀들의 충전잔량을 일치시키는 셀 밸런싱을 수행하게 되는데, 이하에서 설명한다.In order to solve this problem, forcing a power consumption of the battery cells with a large amount of charge remaining to perform a cell balancing to match the remaining charge of the battery cells, which will be described below.
도 1은 기존의 배터리 충전장치를 도시한 도면이다. 도 1에 도시된 바와 같이, 기존의 배터리 충전장치는, PCS(Power Conversion System)(10), 배터리 팩(20), 셀 밸런싱 모듈(30) 및 BMS(Battery Management System)(40)를 구비한다.1 is a view illustrating a conventional battery charger. As shown in FIG. 1, a conventional battery charger includes a power conversion system (PCS) 10, a battery pack 20, a cell balancing module 30, and a battery management system (BMS) 40. .
PCS(10)는 배터리 팩(20)에 마련된 모든 배터리 셀들을 배터리 팩(20)의 구성에 따라 동일한 전압의 충전 전원으로 충전한다. 그리고, 셀 밸런싱 모듈(30)은 BMS(40)의 제어에 따라 배터리 팩(20)에 대해 셀 밸런싱을 수행한다.The PCS 10 charges all the battery cells provided in the battery pack 20 with the charging power of the same voltage according to the configuration of the battery pack 20. The cell balancing module 30 performs cell balancing on the battery pack 20 under the control of the BMS 40.
셀 밸런싱은, BMS(40)가 배터리 셀들의 전압들을 측정하고, 측정된 전압들 중 최저 전압에 배터리 셀들의 전압들을 일치시키는 과정이다. 이를 위해, 최저 전압을 갖는 배터리 셀 이외의 나머지 배터리 셀들에 연결된 스위치(Q1 ~ QN)를 스위칭 온 시켜, 저항(R1 ~ RN)을 통해 충전된 전력을 소모시킨다.Cell balancing is a process in which the BMS 40 measures the voltages of the battery cells and matches the voltages of the battery cells with the lowest voltage among the measured voltages. To this end, the switches Q1 to QN connected to the remaining battery cells other than the battery cell having the lowest voltage are switched on to consume power charged through the resistors R1 to RN.
이와 같은 셀 밸런싱에 의해, 배터리 팩(20)에 마련된 배터리 셀들의 전압이 균등해지기는 하지만, 이 과정에서 불필요한 전력 소모가 발생하는 문제가 있다.By such cell balancing, the voltages of the battery cells provided in the battery pack 20 are equalized, but there is a problem that unnecessary power 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, 선별된 배터리 셀들에만 충전 전원을 공급하고, 선별된 배터리 셀들의 개수를 기초로 충전 전압을 적응적으로 제어하는 배터리 충전 장치 및 그의 배터리 충전 제어방법을 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, to supply charging power to only selected battery cells, The present invention provides a battery charging device for adaptively controlling the charging voltage based on the number and a battery charging control method thereof.
상기 목적을 달성하기 위한 본 발명의 일 실시예에 따른, 배터리 충전 장치는, 배터리 팩에 마련된 배터리 셀들에 충전 전원을 공급하는 충전부; 상기 배터리 셀들과 상기 충전부 간의 전기적 연결을 스위칭하는 스위칭부; 및 상기 배터리 셀들의 전압들을 기초로 선별된 배터리 셀들만이 충전 전원을 공급받도록 상기 스위칭부의 스위칭 동작을 제어하고, 상기 선별된 배터리 셀들의 개수를 기초로 상기 충전부가 공급하는 충전 전원의 전압을 제어하는 관리부;를 포함한다.Battery charging apparatus according to an embodiment of the present invention for achieving the above object, the charging unit for supplying charging power to the battery cells provided in the battery pack; A switching unit for switching an electrical connection between the battery cells and the charging unit; And controlling a switching operation of the switching unit such that only the battery cells selected based on the voltages of the battery cells are supplied with the charging power, and controlling the voltage of the charging power supplied by the charging unit based on the number of the selected battery cells. It includes a management unit.
그리고, 상기 관리부는, 상기 배터리 셀들의 평균 전압을 산출하고, 산출된 평균 전압 미만의 배터리 셀들만을 선별할 수 있다.The manager may calculate an average voltage of the battery cells and select only battery cells less than the calculated average voltage.
또한, 상기 스위칭부는, 선별되지 않은 배터리 셀들이 바이 패스되도록 스위칭 동작하여, 상기 선별되지 않은 배터리 셀들이 상기 충전 전원을 공급받지 않도록 할 수 있다.In addition, the switching unit may perform a switching operation so that the unselected battery cells are bypassed so that the unselected battery cells are not supplied with the charging power.
그리고, 상기 관리부는, 상기 선별된 배터리 셀들의 개수가 증가하면 상기 충전 전원의 전압이 증가하도록 상기 충전부를 제어하고, 상기 선별된 배터리 셀들의 개수가 감소하면 상기 충전 전원의 전압이 감소하도록 상기 충전부를 제어할 수 있다.The management unit controls the charging unit to increase the voltage of the charging power when the number of the selected battery cells increases, and the charging unit to decrease the voltage of the charging power when the number of the selected battery cells decreases. Can be controlled.
또한, 상기 배터리 셀들은 직렬로 연결되고, 상기 관리부는, 상기 충전 전원의 전압이 상기 선별된 배터리 셀들의 개수에 비례하도록 제어할 수 있다.The battery cells may be connected in series, and the manager may control the voltage of the charging power to be proportional to the number of the selected battery cells.
그리고, 상기 관리부는, 상기 스위칭부의 스위칭 동작과 상기 충전부가 공급하는 충전 전원을, 실시간 또는 주기적으로 제어할 수 있다.The management unit may control the switching operation of the switching unit and the charging power supplied by the charging unit in real time or periodically.
또한, 상기 관리부는, 상기 배터리 셀들의 전압들 모두가 특정 전압 범위 내에 포함되면, 모든 배터리 셀들이 충전 전원을 공급받도록 상기 스위칭부의 스위칭 동작을 제어하고, 상기 충전부가 정상 충전 전압의 충전 전원을 공급하도록 제어할 수 있다.In addition, when all voltages of the battery cells are included in a specific voltage range, the management unit controls a switching operation of the switching unit so that all battery cells are supplied with charging power, and the charging unit supplies charging power of a normal charging voltage. Can be controlled.
한편, 본 발명의 다른 실시예에 따른, 배터리 충전 제어방법은, 배터리 팩에 마련된 다수의 배터리 셀들의 전압들을 측정하는 단계; 상기 측정단계에서 측정된 전압들을 기초로, 일부 배터리 셀들을 선별하는 단계; 상기 선별단계에서 선별된 배터리 셀들에 충전 전원이 공급되도록 스위칭하는 단계; 및 선별된 배터리 셀들의 개수를 기초로 충전 전원의 전압을 제어하는 단계;를 포함한다.On the other hand, a battery charge control method according to another embodiment of the present invention, measuring the voltage of the plurality of battery cells provided in the battery pack; Selecting some battery cells based on the voltages measured in the measuring step; Switching so that charging power is supplied to the battery cells selected in the sorting step; And controlling the voltage of the charging power source based on the number of the selected battery cells.
그리고, 상기 선별단계는, 상기 배터리 셀들의 평균 전압을 산출하고, 산출된 평균 전압 미만의 배터리 셀들만을 선별할 수 있다.In the selecting step, the average voltage of the battery cells may be calculated and only battery cells below the calculated average voltage may be selected.
또한, 상기 제어단계는, 상기 선별된 배터리 셀들의 개수가 증가하면, 상기 충전 전원의 전압을 증가시키는 단계; 및 상기 선별된 배터리 셀들의 개수가 감소하면, 상기 충전 전원의 전압을 감소시키는 단계;를 포함할 수 있다.The controlling may include: increasing the voltage of the charging power source when the number of the selected battery cells increases; And reducing the voltage of the charging power source when the number of the selected battery cells decreases.
이상 설명한 바와 같이, 본 발명에 따르면, 선별된 배터리 셀들에만 충전 전원을 공급하고, 선별된 배터리 셀들의 개수를 기초로 충전 전압을 제어하게 되어, 셀 밸런싱에 의한 불필요한 에너지 소모를 줄일 수 있게 된다.As described above, according to the present invention, the charging power is supplied only to the selected battery cells, and the charging voltage is controlled based on the number of the selected battery cells, thereby reducing unnecessary energy consumption due to cell balancing.
또한, 본 발명에 따르면, 셀 밸런싱을 배제할 수 있게 되어, 배터리 충전 속도가 빨라져 충전 시간을 단축시킬 수 있게 된다.In addition, according to the present invention, it is possible to exclude cell balancing, thereby increasing the battery charging speed and shortening the charging time.
도 1은 기존의 배터리 충전장치를 도시한 도면,1 is a view showing a conventional battery charging device,
도 2는 본 발명의 일 실시예에 따른 배터리 충전장치의 블럭도,2 is a block diagram of a battery charging apparatus according to an embodiment of the present invention;
도 3은, 도 2에 도시된 배터리 충전장치를 보다 상세하게 도시한 도면, 그리고,3 is a view showing in detail the battery charging device shown in Figure 2, and
도 4는 본 발명의 다른 실시예에 따른 배터리 충전 제어방법의 설명에 제공되는 흐름도이다.4 is a flowchart provided to explain a battery charge control method according to another embodiment of the present invention.
이하에서는 도면을 참조하여 본 발명을 보다 상세하게 설명한다.Hereinafter, with reference to the drawings will be described the present invention in more detail.
도 2는 본 발명의 일 실시예에 따른 배터리 충전장치의 블럭도이다. 본 실시예에 따른 배터리 충전장치(100)는, '충전장치' 자체로 구현될 수 있음은 물론, 자동차와 같은 '기계장치의 일부'를 구성하거나 모바일 PC와 같은 '전자장치의 일부'를 구성하도록 구현가능하다.2 is a block diagram of a battery charging apparatus according to an embodiment of the present invention. The battery charging device 100 according to the present embodiment may be implemented as a 'charging device', as well as a 'part of a mechanical device' such as a car or a 'part of an electronic device' such as a mobile PC. It can be implemented to
전술한 셀 밸런싱을 배제하기 위해, 본 실시예에 따른 배터리 충전장치(100)는 배터리 셀들에 대한 분리 충전을 수행한다.In order to exclude the above-described cell balancing, the battery charger 100 according to the present embodiment performs separate charging for the battery cells.
이와 같은 기능을 수행하는 배터리 충전장치(100)는, 도 2에 도시된 바와 같이, PCS(Power Conversion System)(110), 스위칭부(120), 배터리 팩(130) 및 BMS(Battery Management System)(140)를 구비한다.As shown in FIG. 2, the battery charger 100 that performs such a function includes a power conversion system (PCS) 110, a switching unit 120, a battery pack 130, and a battery management system (BMS). 140.
배터리 팩(130)에는 다수의 배터리 셀들이 마련되어 있는데, 이 배터리 셀들은 직렬로 연결된 충전가능한 이차 전지들이다.The battery pack 130 is provided with a plurality of battery cells, which are rechargeable secondary batteries connected in series.
PCS(110)는, 배터리 팩(130)에 마련된 배터리 셀들을 충전하기 위한 충전 전원을 공급하는 충전 기능과, 배터리 팩(130)에 충전된 전원을 다른 모듈/소자들(미도시)로 공급하는 전원 공급 기능을 수행한다.The PCS 110 may include a charging function for supplying charging power for charging the battery cells provided in the battery pack 130, and for supplying the charged power to the other module / elements (not shown). Perform the power supply function.
PCS(110)에서 배터리 팩(130)으로 공급되는 충전 전원은 다양한 전압을 가지며, 이 충전 전압은 후술할 BMS(140)에 의해 제어된다.The charging power supplied from the PCS 110 to the battery pack 130 has various voltages, and the charging voltage is controlled by the BMS 140 which will be described later.
스위칭부(120)는 'PCS(110)'와 '배터리 팩(130)에 마련된 배터리 셀들' 간의 전기적 연결을 스위칭한다. 즉, 스위칭부(120)는 배터리 셀들의 전부 또는 일부가 PCS(110)에 전기적으로 연결 또는 차단되도록 스위칭한다.The switching unit 120 switches an electrical connection between the 'PCS 110' and the 'battery cells provided in the battery pack 130'. That is, the switching unit 120 switches so that all or some of the battery cells are electrically connected to or disconnected from the PCS 110.
BMS(140)는 셀 밸런싱 없이도 배터리 팩(130)에 마련된 배터리 셀들이 균등하게 충전될 수 있도록 PCS(110)와 스위칭부(120)를 제어한다. 이를 위해, BMS(140)는 배터리 셀들의 충전 상태를 기초로 분리 충전을 수행하며, 이에 대해서는 도 4를 참조하여 상세히 후술한다.The BMS 140 controls the PCS 110 and the switching unit 120 to evenly charge the battery cells provided in the battery pack 130 without cell balancing. To this end, the BMS 140 performs separate charging based on the state of charge of the battery cells, which will be described later in detail with reference to FIG. 4.
도 3은, 도 2에 도시된 배터리 충전장치(100)를 보다 상세하게 도시한 도면이다.3 is a view illustrating the battery charger 100 shown in FIG. 2 in more detail.
도 3에 도시된 바에 따르면, 배터리 팩(130)에는 5개의 배터리 셀들(BC①~⑤)이 마련되어 있음을 확인할 수 있는데, 배터리 팩(130)에 마련되는 배터리 셀의 개수는 필요한 개수로 변경가능하다. 이는, 배터리 팩(130)에 마련되는 배터리 셀의 개수가 5개 미만이거나 또는 5개를 초과하는 경우에도 본 발명의 기술적 사상이 적용될 수 있음을 의미한다.As shown in FIG. 3, it can be seen that five battery cells BC ① to ⑤ are provided in the battery pack 130, and the number of battery cells provided in the battery pack 130 can be changed to the required number. . This means that the technical spirit of the present invention may be applied even when the number of battery cells provided in the battery pack 130 is less than five or more than five.
스위칭부(120)는 다수의 스위치들(SW①~⑬, BSW①~⑤)로 구성되어 있는데, 이 스위치들(SW①~⑬, BSW①~⑤)은 FET, TR, PhotoMOS Relay 등의 트랜지스터 소자나 릴레이 소자로 구현할 수 있다. Switching unit 120 is composed of a plurality of switches (SW ① ~ ⑬, BSW ① ~ ⑤), these switches (SW ① ~ ⑬, BSW ① ~ ⑤) are transistor elements such as FET, TR, PhotoMOS Relay or relay elements Can be implemented as:
한편, 스위칭부(120)는 다수의 스위치들(SW①~⑬, BSW①~⑤)의 스위칭 제어를 통해 배터리 셀들 중 일부를 바이 패스시킬 수 있다. 즉, 다수의 스위치들(SW①~⑬, BSW①~⑤)은 배터리 셀들 중 적어도 두 개 이상을 직렬로 연결시킬 수 있도록 배치되어 있다. 예를 들어, 5개의 배터리 셀 중 가운데 배터리 셀을 제외한 나머지 4개의 배터리 셀을 충전할 경우, 스위칭부(120)는 다수의 스위치들(SW①~⑬, BSW①~⑤)의 온오프 상태를 제어하여, 가운데 배터리 셀을 제외한 4개의 배터리 셀을 서로 직렬로 연결하게 된다.On the other hand, the switching unit 120 may bypass some of the battery cells through the switching control of the plurality of switches (SW① ~ ⑬, BSW ① ~ ⑤). That is, the plurality of switches SW① to ⑬ and BSW① to ⑤ are arranged to connect at least two or more of the battery cells in series. For example, when charging the remaining four battery cells except the battery cell among the five battery cells, the switching unit 120 controls the on-off state of the plurality of switches (SW① ~ ⑬, BSW ① ~ ⑤) In addition, four battery cells except the center battery cell are connected to each other in series.
바이 패스 된 배터리 셀들은 PCS(110)로부터 충전 전원을 인가받을 수 없다. 환언하면, 바이 패스 되지 않은 배터리 셀들만이 PCS(110)로부터 충전 전원을 인가받을 수 있다고 할 수 있다.Bypassed battery cells may not receive charging power from the PCS 110. In other words, only battery cells that are not bypassed may receive charging power from the PCS 110.
예를 들어, 'SW①, SW⑧, BSW②, SW⑨, SW③, SW④, SW⑤, SW⑫, BSW⑤, SW⑬은 스위칭-온' 시키고 '다른 스위치들을 스위칭-오프' 시킨 경우, 1) BC①, BC③ 및 BC④는 바이 패스 되어 PCS(110)로부터 충전 전원을 인가받을 수 없고, 2) 바이 패스 되지 않은 BC② 및 BC⑤ 만이 PCS(110)로부터 충전 전원을 인가받게 된다. 즉, BC② 및 BC⑤ 에 대해서만 분리 충전이 이루어진다.For example, if 'SW①, SW⑧, BSW②, SW⑨, SW③, SW④, SW⑤, SW⑫, BSW⑤, SW⑬ are switched on' and 'switch other switches off', 1) BC①, BC③ and BC④ It is not possible to receive the charging power from the PCS 110, and 2) Only BC② and BC⑤ that are not bypassed are supplied with the charging power from the PCS 110. That is, separate charging is performed only for BC② and BC⑤.
한편, 도 3에 도시된 바에 따르면, BMS(140)는 셀 전압 측정부(141), 중앙 제어부(142), 스위칭 제어부(143) 및 통신부(144)를 구비하고 있음을 확인할 수 있다.Meanwhile, as shown in FIG. 3, the BMS 140 may include a cell voltage measuring unit 141, a central control unit 142, a switching control unit 143, and a communication unit 144.
셀 전압 측정부(141)는 포트들을 통해 감지되는 전압들의 차들을 각각 산출하여, 배터리 셀들(BC①~⑤)의 전압들을 측정한다.The cell voltage measuring unit 141 calculates differences of voltages detected through the ports, respectively, and measures voltages of the battery cells BC ① to ⑤.
셀 전압 측정부(141)에서 측정된 배터리 셀들(BC①~⑤)의 전압들을 기초로, 중앙 제어부(142)는 충전할 배터리 셀들을 선별한다.Based on the voltages of the battery cells BC 1 to ⑤ measured by the cell voltage measuring unit 141, the central controller 142 selects battery cells to be charged.
그리고, 중앙 제어부(142)는 스위치들(SW①~⑬, BSW①~⑤)의 스위칭 동작을 직접 제어하는 스위칭 제어부(143)를 통해 스위칭부(120)로 스위칭 제어신호를 전송하여, 선별되지 않은 배터리 셀들이 바이 패스 되도록 제어한다.The central control unit 142 transmits a switching control signal to the switching unit 120 through the switching control unit 143 which directly controls the switching operations of the switches SW① to ① and BSW① to ⑤. Control the cells to bypass.
또한, 중앙 제어부(142)는 통신부(144)를 통해 PCS(110)로 충전 전압 제어신호를 전송하여, 선별된 배터리 셀들을 충전하기에 적합한 전압을 갖는 충전 전원이 PCS(110)에서 출력되도록 제어한다.In addition, the central control unit 142 transmits a charge voltage control signal to the PCS 110 through the communication unit 144, so that the charging power having a voltage suitable for charging the selected battery cells is output from the PCS 110. do.
이하에서, 도 3에 도시된 배터리 충전장치(100)의 BMS(140)가 배터리 팩(130)에 마련된 5개의 배터리 셀들(BC①~⑤)에 대한 충전을 제어하는 과정에 대해, 도 4를 참조하여 상세히 설명한다.Hereinafter, a process of controlling the charging of the five battery cells BC ① to ⑤ provided in the battery pack 130 by the BMS 140 of the battery charger 100 illustrated in FIG. 3, see FIG. 4. It will be described in detail.
도 4는 본 발명의 다른 실시예에 따른 배터리 충전 제어방법의 설명에 제공되는 흐름도이다. 도시된 바와 같이, 먼저, 셀 전압 측정부(141)는 배터리 셀들(BC①~⑤)의 전압들을 측정한다(S210).4 is a flowchart provided to explain a battery charge control method according to another embodiment of the present invention. As shown, first, the cell voltage measuring unit 141 measures the voltages of the battery cells BC ① to ⑤ (S210).
S210단계에서 측정된 전압들이 모두 일치하지 않으면(S220-N), 중앙 제어부(142)는 S210단계에서 측정된 전압들을 평균을 계산하여, 배터리 셀들(BC①~⑤)의 평균 전압을 산출한다(S230). 이후, 중앙 제어부(142)는 평균 전압 미만의 배터리 셀들을 선별한다(S240).If the voltages measured in step S210 do not all match (S220 -N), the central controller 142 calculates an average of the voltages measured in step S210, and calculates an average voltage of the battery cells BC ① to ⑤ (S230). ). Thereafter, the central controller 142 selects battery cells less than the average voltage (S240).
그리고, 중앙 제어부(142)는 S240단계에서 선별된 배터리 셀들만이 충전되도록 스위칭 제어부(143)를 통해 스위칭부(120)를 제어한다(S250).In addition, the central controller 142 controls the switching unit 120 through the switching controller 143 to charge only the battery cells selected in operation S240 (S250).
또한, 중앙 제어부(142)는 S240단계에서 선별된 배터리 셀들의 개수를 기초로 PCS(110)의 충전 전압을 결정하고, 통신부(144)를 통해 PCS(110)의 충전 전압 제어신호를 전송하여 결정된 충전 전압이 PCS(110)에서 출력되도록 제어한다(S260).In addition, the central controller 142 determines the charging voltage of the PCS 110 based on the number of battery cells selected in step S240, and transmits the charging voltage control signal of the PCS 110 through the communication unit 144. The charging voltage is controlled to be output from the PCS 110 (S260).
이에 의해, S240단계에서 선별된 배터리 셀들에 대해서만 분리 충전이 이루어진다(S270).As a result, separate charging is performed only for the battery cells selected in step S240 (S270).
예를 들어, 배터리 셀들(BC①~⑤) 중 "BC②와 BC⑤"가 평균 전압 미만인 경우, S240단계에서는 "BC②와 BC⑤"가 선별된다. 그리고, S250단계에서는 BC①, BC③ 및 BC④는 바이 패스 되지만 BC②와 BC⑤는 바이 패스되지 않도록 스위칭부(120)가 스위칭 동작하여, 배터리 셀들(BC①~⑤) 중 "BC②와 BC⑤" 만이 PCS(110)로부터 충전 전원을 인가받게 된다.For example, when "BC② and BC⑤" of the battery cells BC① to ⑤ is less than the average voltage, "BC② and BC⑤" are selected in step S240. And, in step S250, BC①, BC③ and BC④ are bypassed, but the switching unit 120 switches so that BC② and BC⑤ are not bypassed, so that only "BC② and BC⑤" among the battery cells BC① to ⑤ are PCS 110. The charging power is applied from the
한편, 1) 배터리 셀 1개를 충전하기에 적합한 충전 전압을 V1, 2) 배터리 셀 2개를 충전하기에 적합한 충전 전압을 V2, 3) 배터리 셀 3개를 충전하기에 적합한 충전 전압을 V3, 4) 배터리 셀 4개를 충전하기에 적합한 충전 전압을 V4, 및 5) 배터리 셀 5개를 충전하기에 적합한 충전 전압을 V5로 상정한다.Meanwhile, 1) a charging voltage suitable for charging one battery cell V 1 , 2) a charging voltage suitable for charging two battery cells V 2 , 3) a charging voltage suitable for charging three battery cells V 3 , 4) Assume a charging voltage suitable for charging four battery cells V 4 , and 5) A charging voltage suitable for charging five battery cells is V 5 .
그러면, S260단계에서 PCS(110)는 2개의 배터리 셀(BC②와 BC⑤)을 충전하기에 적합한 충전 전압인 "V2"를 출력하도록 제어된다.Then, in step S260, the PCS 110 is controlled to output "V 2 ", which is a charging voltage suitable for charging the two battery cells BC② and BC⑤.
PCS(110)에서 출력되는 충전 전압들은 "V1 > V2 > V3 > V4 > V5"의 관계를 갖는다. 그리고, 배터리 팩(130)에 마련된 배터리 셀들이 직렬로 연결되어 있는 관계로, PCS(110)에서 출력되는 충전 전압들은 충전할 배터리 셀의 개수에 비례한다.The charging voltages output from the PCS 110 have a relationship of "V 1 > V 2 > V 3 > V 4 > V 5 ". In addition, since the battery cells provided in the battery pack 130 are connected in series, the charging voltages output from the PCS 110 are proportional to the number of battery cells to be charged.
즉, 충전할 배터리 셀의 개수를 "k"라고 한다면, PCS(110)에서 출력되는 충전 전압은 "k×V1"가 성립한다. 이에 따르면, "V2 = 2×V1", "V3 = 3×V1", "V4 = 4×V1" 및 "V5 = 5×V1"의 관계가 성립하게 된다.That is, if the number of battery cells to be charged is "k", the charging voltage output from the PCS 110 is "k x V 1 ". According to this, the relationship of "V 2 = 2 x V 1 ", "V 3 = 3 x V 1 ", "V 4 = 4 x V 1 ", and "V 5 = 5 x V 1 " is established.
S270단계 이후에는 S210단계부터 재수행된다.After step S270 is performed again from step S210.
S210단계 내지 S270단계를 통해 수행되는, 배터리 셀 전압 측정, 스위칭 제어, 충전 전압 제어에 의한 배터리 셀 분리 충전은 실시간으로 연속적으로 수행되는 것으로 구현가능하지만, 특정 주기(예를 들면, 1분 마다)로 간헐적으로 수행될 수도 있다.The battery cell separation charging by the battery cell voltage measurement, the switching control, and the charge voltage control, which is performed through steps S210 to S270, may be implemented as being continuously performed in real time, but at a specific cycle (for example, every minute). May be performed intermittently.
S210단계 내지 S270단계가 반복되는 과정에서, S230단계를 통해 선별되는 배터리 셀들의 종류와 개수가 변경될 수 있다.In the process of repeating steps S210 to S270, the type and number of battery cells selected through step S230 may be changed.
배터리 셀들의 종류 변경은 S250단계에서 스위칭부(120)의 스위칭 동작 변경을 유발한다.Changing the type of the battery cells causes a change in the switching operation of the switching unit 120 in step S250.
그리고, 배터리 셀들의 개수 변경은 S260단계에서 PCS(110)가 출력하는 충전 전압 변경을 유발하게 된다. 구체적으로, 선별된 배터리 셀들의 개수가 증가하면 충전 전압이 증가하고, 선별된 배터리 셀들의 개수가 감소하면 충전 전압이 감소하게 된다.The change in the number of battery cells causes a change in the charging voltage output from the PCS 110 in operation S260. Specifically, when the number of selected battery cells increases, the charging voltage increases, and when the number of selected battery cells decreases, the charging voltage decreases.
한편, S210단계 내지 S270단계가 반복되어, S210단계에서 측정된 전압들이 모두 일치하게 되면(S220-Y), 중앙 제어부(142)는 모든 배터리 셀들(BC①~⑤)이 정상 충전 전압으로 충전되도록 제어한다(S280).On the other hand, if the steps S210 to S270 is repeated, and the voltages measured in step S210 are all matched (S220-Y), the central control unit 142 controls all battery cells BC① to ⑤ to be charged at the normal charging voltage. (S280).
구체적으로, 중앙 제어부(142)는 모든 배터리 셀들(BC①~⑤)이 충전되도록 스위칭 제어부(143)를 통해 스위칭부(120)를 제어하여, 'SW⑦, BSW①, BSW②, BSW③, BSW④, BSW⑤ 및 SW⑬은 스위칭-온' 되고 '다른 스위치들을 스위칭-오프' 되도록 한다.Specifically, the central control unit 142 controls the switching unit 120 through the switching control unit 143 so that all the battery cells BC① to ⑤ are charged. Is switched on 'and' switches off other switches'.
또한, PCS(110)에서는 5개의 배터리 셀들(BC①~⑤)을 충전하기에 적합한 충전 전압 V5를 출력하는데, 충전 전압 V5는 PCS(110)가 일반적으로 출력하는 충전 전압이기에 정상 충전 전압으로 명명하였다.In addition, PCS (110) in the normal charged voltage because the charging voltage which to output the charge voltage V 5 is suitable for filling the five battery cells (BC① ~ ⑤), the charging voltage V 5 is PCS (110) is normally output to the Named it.
S220단계에서의 모든 전압들의 일치는, 완전한 일치를 요구하는 것은 아니며, 약간의 편차를 허용한다. 즉, S210단계에서의 배터리 셀들의 전압들이 허용 전압 범위 내에 포함되면, S220단계에서 전압들이 모두 일치하는 것으로 취급할 수 있다.The coincidence of all voltages in step S220 does not require a perfect match, and allows a slight deviation. That is, when the voltages of the battery cells in step S210 are included in the allowable voltage range, all of the voltages may be treated as identical in step S220.
예를 들어, 배터리 셀들의 전압들(4.01V, 4.02V, 4.01V, 4.00V 및 3.99V) 중 최대 전압(4.02V)과 최저 전압(3.99V)의 차(0.03V)가 최대 전압의 1%(0.04V = 4.02 * 1%) 미만인 경우, 배터리 셀들의 전압들이 허용 전압 범위 내에 포함되는 것으로 취급할 수 있다.For example, the difference between the maximum voltage (4.02V) and the lowest voltage (0.03V) of the voltages (4.01V, 4.02V, 4.01V, 4.00V, and 3.99V) of the battery cells (0.03V) is 1 of the maximum voltage. If less than% (0.04V = 4.02 * 1%), the voltages of the battery cells can be treated as being within the allowable voltage range.
지금까지, 셀 밸런싱을 배제하기 위한 배터리 셀 분리 충전 기법을 채택한 배터리 충전장치 및 방법에 대해, 바람직한 실시예들을 들어 상세히 설명하였다.So far, battery chargers and methods employing battery cell separate charging techniques to rule out cell balancing have been described in detail with reference to preferred embodiments.
위 실시예에서, 배터리 팩(130)에 마련된 배터리 셀들은 모두 직렬로 연결되는 것으로 상정하였으나, 이는 설명의 편의를 위한 일 예에 불과하다. 배터리 셀들이 직/병렬 혼합으로 연결된 경우에도 본 발명의 기술적 사상이 적용될 수 있다.In the above embodiment, it is assumed that the battery cells provided in the battery pack 130 are all connected in series, but this is merely an example for convenience of description. Even when the battery cells are connected in a serial / parallel mixture, the technical idea of the present invention may be applied.
또한, 충전 전압이 충전할 배터리 셀들의 개수에 비례하도록 한 것은 배터리 셀들이 직렬로 연결된 경우를 상정한 것으로, 배터리 셀들의 연결 구조가 변형된다면 충전 전압은 충전할 배터리 셀들의 개수에 반드시 비례하지 않을 수도 있음에 유념하여야 한다.In addition, it is assumed that the charging voltage is proportional to the number of battery cells to be charged. It is assumed that the battery cells are connected in series. If the connection structure of the battery cells is modified, the charging voltage is not necessarily proportional to the number of battery cells to be charged. It should be noted that it may be.
그리고, 스위칭부(120)를 구성하는 스위치들(SW①~⑬, BSW①~⑤)의 배치/연결 구조 역시 설명의 편의를 위한 일 예에 불과한 것으로, 제시한 배치/구조는 변경가능하다.In addition, the arrangement / connection structure of the switches (SW① ~ BS, BSW ① ~ ⑤) constituting the switching unit 120 is also merely an example for convenience of explanation, the arrangement / structure presented is changeable.
한편, 위 실시예에서는 배터리 셀들의 전압들을 측정하여, 분리 충전할 배터리 셀들을 선별하였는데, 배터리 셀의 전압이 아닌 전류나 전력량 등의 다른 파라미터를 기준으로 분리 충전할 배터리 셀들을 선별하는 것도 가능함은 물론이다.Meanwhile, in the above embodiment, the battery cells to be separated and charged are selected by measuring the voltages of the battery cells, but it is also possible to select the battery cells to be separately charged based on other parameters such as current or power amount, not the voltage of the battery cells. Of course.
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 (10)

  1. 배터리 팩에 마련된 배터리 셀들에 충전 전원을 공급하는 충전부;A charging unit supplying charging power to battery cells provided in the battery pack;
    상기 배터리 셀들과 상기 충전부 간의 전기적 연결을 스위칭하는 스위칭부; 및A switching unit for switching an electrical connection between the battery cells and the charging unit; And
    상기 배터리 셀들의 전압들을 기초로 선별된 배터리 셀들만이 충전 전원을 공급받도록 상기 스위칭부의 스위칭 동작을 제어하고, 상기 선별된 배터리 셀들의 개수를 기초로 상기 충전부가 공급하는 충전 전원의 전압을 제어하는 관리부;를 포함하는 것을 특징으로 하는 배터리 충전 장치.Controlling the switching operation of the switching unit such that only the battery cells selected based on the voltages of the battery cells are supplied with the charging power, and controlling the voltage of the charging power supplied by the charging unit based on the number of the selected battery cells. Battery management apparatus comprising a; management unit.
  2. 제 1항에 있어서,The method of claim 1,
    상기 관리부는,The management unit,
    상기 배터리 셀들의 평균 전압을 산출하고, 산출된 평균 전압 미만의 배터리 셀들만을 선별하는 것을 특징으로 하는 배터리 충전 장치.Calculating an average voltage of the battery cells and selecting only battery cells below the calculated average voltage.
  3. 제 1항에 있어서,The method of claim 1,
    상기 스위칭부는,The switching unit,
    선별되지 않은 배터리 셀들이 바이 패스되도록 스위칭 동작하여, 상기 선별되지 않은 배터리 셀들이 상기 충전 전원을 공급받지 않도록 하는 것을 특징으로 하는 배터리 충전 장치.Switching operation so that the unselected battery cells are bypassed so that the unselected battery cells are not supplied with the charging power.
  4. 제 1항에 있어서,The method of claim 1,
    상기 관리부는,The management unit,
    상기 선별된 배터리 셀들의 개수가 증가하면 상기 충전 전원의 전압이 증가하도록 상기 충전부를 제어하고, 상기 선별된 배터리 셀들의 개수가 감소하면 상기 충전 전원의 전압이 감소하도록 상기 충전부를 제어하는 것을 특징으로 하는 배터리 충전 장치.And control the charging unit to increase the voltage of the charging power when the number of the selected battery cells increases, and control the charging unit to decrease the voltage of the charging power when the number of the selected battery cells decreases. Battery charging device.
  5. 제 4항에 있어서,The method of claim 4, wherein
    상기 배터리 셀들은 직렬로 연결되고,The battery cells are connected in series,
    상기 관리부는,The management unit,
    상기 충전 전원의 전압이 상기 선별된 배터리 셀들의 개수에 비례하도록 제어하는 것을 특징으로 하는 배터리 충전 장치.And controlling the voltage of the charging power to be proportional to the number of the selected battery cells.
  6. 제 1항에 있어서,The method of claim 1,
    상기 관리부는,The management unit,
    상기 스위칭부의 스위칭 동작과 상기 충전부가 공급하는 충전 전원을, 실시간 또는 주기적으로 제어하는 것을 특징으로 하는 배터리 충전 장치.And a switching operation of the switching unit and a charging power supplied by the charging unit in real time or periodically.
  7. 제 1항에 있어서,The method of claim 1,
    상기 관리부는,The management unit,
    상기 배터리 셀들의 전압들 모두가 특정 전압 범위 내에 포함되면, 모든 배터리 셀들이 충전 전원을 공급받도록 상기 스위칭부의 스위칭 동작을 제어하고, 상기 충전부가 정상 충전 전압의 충전 전원을 공급하도록 제어하는 것을 특징으로 하는 배터리 충전 장치.When all of the voltages of the battery cells are included in a specific voltage range, the switching operation of the switching unit is controlled so that all battery cells are supplied with charging power, and the charging unit controls to supply charging power of a normal charging voltage. Battery charging device.
  8. 배터리 팩에 마련된 다수의 배터리 셀들의 전압들을 측정하는 단계;Measuring voltages of a plurality of battery cells provided in the battery pack;
    상기 측정단계에서 측정된 전압들을 기초로, 일부 배터리 셀들을 선별하는 단계;Selecting some battery cells based on the voltages measured in the measuring step;
    상기 선별단계에서 선별된 배터리 셀들에 충전 전원이 공급되도록 스위칭하는 단계; 및Switching so that charging power is supplied to the battery cells selected in the sorting step; And
    선별된 배터리 셀들의 개수를 기초로 충전 전원의 전압을 제어하는 단계;를 포함하는 것을 특징으로 하는 배터리 충전 제어방법.And controlling the voltage of the charging power source based on the number of selected battery cells.
  9. 제 8항에 있어서,The method of claim 8,
    상기 선별단계는,The screening step,
    상기 배터리 셀들의 평균 전압을 산출하고, 산출된 평균 전압 미만의 배터리 셀들만을 선별하는 것을 특징으로 하는 배터리 충전 제어방법.Calculating an average voltage of the battery cells and selecting only battery cells below the calculated average voltage.
  10. 제 8항에 있어서,The method of claim 8,
    상기 제어단계는,The control step,
    상기 선별된 배터리 셀들의 개수가 증가하면, 상기 충전 전원의 전압을 증가시키는 단계; 및Increasing the voltage of the charging power source when the number of the selected battery cells increases; And
    상기 선별된 배터리 셀들의 개수가 감소하면, 상기 충전 전원의 전압을 감소시키는 단계;를 포함하는 것을 특징으로 하는 배터리 충전 제어방법.And reducing the voltage of the charging power source when the number of the selected battery cells is reduced.
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