KR20040103717A - Rechargeable battery pack - Google Patents
Rechargeable battery pack Download PDFInfo
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- KR20040103717A KR20040103717A KR1020030035397A KR20030035397A KR20040103717A KR 20040103717 A KR20040103717 A KR 20040103717A KR 1020030035397 A KR1020030035397 A KR 1020030035397A KR 20030035397 A KR20030035397 A KR 20030035397A KR 20040103717 A KR20040103717 A KR 20040103717A
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Classifications
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- 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
- H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
- G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
- G01R19/16542—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies for batteries
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- 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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- 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
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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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
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- 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
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- 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
Abstract
Description
본 발명은 재충전 전지팩에 관한 것으로서, 특히 수천 mA의 고출력특성을 가진 리튬이온 전지팩에 관한 것이다.The present invention relates to a rechargeable battery pack, and more particularly to a lithium ion battery pack having a high output characteristics of several thousand mA.
Li-ion 전지의 장점은 용량이 커서 충전 후 오래 사용할 수 있다는 것이다. 또한 다른 전지보다 가볍다는 특징이 있다. 그러나 다른 전지보다 위험하며, 안전성 문제로 인하여 고 전류를 흘릴 수 있는 고출력(high power)전지를 만들기가 힘들다는 것이 문제점으로 지적되고 있다.The advantage of Li-ion batteries is their large capacity and long life after charging. It is also lighter than other batteries. However, it is pointed out as a problem that it is more difficult to make a high power battery which is more dangerous than other batteries and can flow high current due to safety problems.
따라서 전지의 성능을 유지하고 안전성(safety)을 유지하기 위하여 타 전지에서는 사용하지 않는 보호회로를 사용한다.Therefore, in order to maintain battery performance and safety, a protection circuit not used in other batteries is used.
리튬이온 재충전 전지팩은 복수의 직렬연결 베어 전지셀(단전지)들과 팩 전극들을 보호회로로 연결한 구조를 한다. 보호회로와 팩전극들 사이에는 정전압 회로를 채용하여 방전시 출력전압을 일정한 레벨로 유지한다.The lithium ion rechargeable battery pack has a structure in which a plurality of series connected bare battery cells (single cells) and pack electrodes are connected by a protection circuit. A constant voltage circuit is employed between the protection circuit and the pack electrodes to maintain the output voltage at a constant level during discharge.
따라서, 방전모드에서는 전지팩의 개방회로 상태에서 단자전압을 측정할 수 있다. 그러나 이 단자전압은 정전압 회로를 통하여 측정된 전압이므로 내부 전지셀들의 정확한 단자전압과는 차이가 있다.Therefore, in the discharge mode, the terminal voltage can be measured in the open circuit state of the battery pack. However, this terminal voltage is a voltage measured through the constant voltage circuit, which is different from the exact terminal voltage of the internal battery cells.
한편, 방전방지모드에서는 전지팩의 개방회로 상태에서 단자전압을 측정할 수 없다. 단자전압을 측정하기 위해서는 소량의 충전전류를 공급하여 방전방지모드를 해제한 후에 방전모드에서 측정하여야 한다.In the discharge prevention mode, the terminal voltage cannot be measured in the open circuit state of the battery pack. In order to measure the terminal voltage, a small amount of charging current must be supplied to release the discharge prevention mode and then measured in discharge mode.
즉, 전지팩은 내부에 전지셀을 수납한 후 밀봉한 다음에는 전지셀 직렬연결의 단자전압을 정확하게 측정할 수 없었다.That is, the battery pack was not able to accurately measure the terminal voltage of the battery cell series connection after sealing the battery cell inside.
그러나 재충전 전지팩을 취급하는 사용자나 충전기를 개발하는 개발자의 경우에는 정확한 전지셀 직렬연결의 단자전압을 측정할 필요가 있다.However, a user who handles a rechargeable battery pack or a developer who develops a charger needs to measure a terminal voltage of an accurate battery cell series connection.
본 발명은 이와 같은 종래 기술의 문제점을 해결하기 위하여 외부에서 전지셀의 단자전압의 측정이 용이하도록 전지셀의 직렬연결과 팩 전극 사이에 감시패스를 가진 재충전 전지팩을 제공하는 데 있다.The present invention is to provide a rechargeable battery pack having a monitoring path between the series connection of the battery cell and the pack electrode to facilitate the measurement of the terminal voltage of the battery cell from the outside in order to solve the problems of the prior art.
도 1은 본 발명에 의한 재충전 전지팩의 외관을 나타낸 사시도.1 is a perspective view showing the appearance of a rechargeable battery pack according to the present invention.
도 2는 도 1의 전지팩의 회로 구성도.FIG. 2 is a circuit diagram of the battery pack of FIG. 1. FIG.
*도면의 주요부분에 대한 간단한 부호의 설명** Description of the simple symbols for the main parts of the drawings *
10 : 전지팩 12 : 케이스10: battery pack 12: case
14 : 덮개 조립체 14a, 14b : 환형전극14 cover assembly 14a, 14b annular electrode
14c : 원판전극 14d, 14e : 절연환테14c: disc electrode 14d, 14e: insulated ring frame
20 : 보호회로 30 : 정전압 제어회로20: protection circuit 30: constant voltage control circuit
40 : 감시 및 충전 모드 설정회로40: monitoring and charging mode setting circuit
상기 목적을 달성하기 위하여 본 발명의 재충전 전지팩은 팩 플러스 전극, 팩 마이너스 전극 및 감시전극들과, 적어도 하나 이상의 베어 전지셀들과 상기 전지셀들의 과충전 및 과방전을 보호하는 보호회로를 하나의 케이스 내에 포함한다. 또한, 전지셀들의 직렬연결의 플러스전극에 소오스가 연결되고, 상기 팩 플러스 전극에 드레인이 연결된 제1필드효과트랜지스터와, 전지셀들의 직렬연결의 플러스전극에 소오스가 연결되고, 상기 팩 플러스 전극에 드레인이 연결된 제1필드효과트랜지스터와, 제1필드효과트랜지스터의 게이트에 연결되고, 상기 전지팩의 출력전압의 레벨이 일정 정전압으로 유지되도록 상기 제1필드효과트랜지스터의 게이트에 제어신호를 공급하는 정전압 제어회로와, 제2필드효과트랜지스터의 게이트에 연결되고, 방전모드에서는 상기 제2필드효과트랜지스터를 턴오프 상태로 유지하고, 충전 및 감시모드에서는 상기 제2필드효과트랜지스터를 턴온 상태로 유지하여 상기 전지셀들의 플러스전극과 팩플러스 전극을 직접 연결하는 충전 및 감시모드 설정회로를 구비한 것을 특징으로 한다.In order to achieve the above object, the rechargeable battery pack of the present invention includes a pack plus electrode, a pack negative electrode, and a supervisory electrode, and at least one bare battery cell and a protection circuit for protecting overcharge and overdischarge of the battery cells. It is included in a case. In addition, a source is connected to a positive electrode of a series connection of battery cells, a first field effect transistor having a drain connected to the pack plus electrode, a source is connected to a positive electrode of a series connection of battery cells, and connected to the pack plus electrode. A constant voltage connected to a drain of the first field effect transistor connected to the gate of the first field effect transistor, and supplying a control signal to the gate of the first field effect transistor such that the level of the output voltage of the battery pack is maintained at a constant constant voltage. A control circuit and a gate of a second field effect transistor, the second field effect transistor being turned off in a discharge mode, and the second field effect transistor being turned on in a charging and monitoring mode, The charging and monitoring mode setting circuit directly connects the plus electrode and the pack plus electrode of the battery cells. And that is characterized.
본 발명에서 정전압제어회로는 팩 플러스전극과 팩 마이너스 전극 사이에 연결되어 출력전압을 분압하여 분압신호를 발생하는 제1분배수단과, 직렬연결의 플러스전극에 연결되어 기준전압을 발생하는 기준전압 발생부와, 기준전압과 상기 분압신호를 비교하여 상기 출력전압이 정전압이 되도록 제1필드효과트랜지스터의 게이트 전압을 제어하는 제1비교기를 포함한다.In the present invention, the constant voltage control circuit includes a first distribution means connected between the pack plus electrode and the pack minus electrode to divide the output voltage to generate a divided signal, and a reference voltage connected to the plus electrode in series to generate a reference voltage. And a first comparator for comparing the reference voltage and the divided signal to control the gate voltage of the first field effect transistor so that the output voltage becomes a constant voltage.
본 발명에서 충전 및 감시모드 설정회로는 기준전압을 분압하여 모드기준전압을 발생하는 제2분배수단과, 모드기준전압을 기준으로 감시전극에 인가된 신호 레벨에 따라 제2필드효과트랜지스터를 스위칭 구동하는 제2비교기를 포함한다.In the present invention, the charging and monitoring mode setting circuit switches the second distribution means for generating a mode reference voltage by dividing the reference voltage and switching the second field effect transistor according to the signal level applied to the monitoring electrode based on the mode reference voltage. It includes a second comparator.
이하 첨부한 도면을 참조하여 본 발명을 보다 상세하게 설명하고자 한다.Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.
도 1을 참조하면, 본 발명의 전지팩(10)은 원통형 절연 케이스(12)와 덮개 조립체(14)로 구성된다. 덮개 조립체(14)의 전면에는 환형전극(14a, 14b) 및 원판전극(14c)이 동심원상으로 배치되고 절연환테(14d, 14e)에 의해 서로 전기적으로 절연되고 고정된다. 절연환테(14d, 14e)는 전극들(14a~14c)보다 돌출되어 도체에 의한 전극들 사이의 단락을 방지한다.Referring to Figure 1, the battery pack 10 of the present invention is composed of a cylindrical insulating case 12 and the cover assembly (14). At the front of the lid assembly 14, the annular electrodes 14a and 14b and the disc electrodes 14c are arranged concentrically and electrically insulated and fixed to each other by the insulating rings 14d and 14e. The insulated rings 14d and 14e protrude from the electrodes 14a to 14c to prevent short circuits between the electrodes by the conductors.
원판전극(14c)은 팩 플러스전극으로 제공되고, 환형전극(14b)은 팩 마이너스 전극으로 제공되고, 환형전극(14a)은 감시전극으로 제공된다.The disc electrode 14c serves as a pack plus electrode, the annular electrode 14b serves as a pack minus electrode, and the annular electrode 14a serves as a monitoring electrode.
도 2를 참조하면, 본 발명의 재충전 전지팩의 회로구성은 전지셀들(BT1, BT2), 보호회로(20), 필드효과트랜지스터(FET1, FET2), 정전압제어회로(30), 충전 및 감시모드 설정회로(40)를 포함한다.2, the circuit configuration of the rechargeable battery pack of the present invention is the battery cells (BT1, BT2), protection circuit 20, field effect transistors (FET1, FET2), constant voltage control circuit 30, charging and monitoring And a mode setting circuit 40.
전지셀(BT1, BT2)은 리튬이온 베어 전지셀(단전지)들로 노드(N1) 및 노드(N3) 사이에 직렬로 연결된다. 따라서, 전지셀들(BT1, BT2)의 직렬연결의 단자전압은 노드(N1)와 노드(N3) 사이의 전압이다. 즉 노드(N1)는 전지셀들의 플러스 전극으로 제공되고, 노드(N2)는 전지셀들의 마이너스 전극으로 제공된다.The battery cells BT1 and BT2 are connected in series between the node N1 and the node N3 as lithium ion bare battery cells (single cells). Therefore, the terminal voltage of the series connection of the battery cells BT1 and BT2 is the voltage between the node N1 and the node N3. That is, the node N1 is provided as a positive electrode of the battery cells, and the node N2 is provided as a negative electrode of the battery cells.
보호회로(20)는 일반적으로 널리 알려진 회로구성으로 저항(R1~R4), 커패시터(C1~C3), 스위치 소자(SW1, SW2), 집적회로(IC)를 포함한다. 노드(N1)는 저항(R1)을 통하여 집적회로(IC)의 VCC 단자에 연결되고, 노드(N2)는 저항(R2)을통하여 집적회로(IC)의 VC 단자에 연결되고, 노드(N3)는 직접 집적회로(IC)의 VSS 단자에 연결된다. 또한, 노드(N1)는 저항(R1)을 통하여 집적회로(IC)의 SENS 단자에 연결된다. 노드(N3)는 스위치 소자(SW1, SW2)의 직렬연결을 통하여 노드(N4)에 연결된다. 노드(N4)는 저항(R4)를 통하여 집적회로(IC)의 VM 단자에 연결된다. 집적회로(IC)는 DO 단자를 통하여 스위치 소자(SW1)을 스위칭 제어하고 CO 단자를 통하여 스위치 소자(SW2)를 스위칭 제어한다.The protection circuit 20 generally includes a resistor R1 to R4, capacitors C1 to C3, switch elements SW1 and SW2, and an integrated circuit IC. The node N1 is connected to the VCC terminal of the integrated circuit IC through the resistor R1, the node N2 is connected to the VC terminal of the integrated circuit IC through the resistor R2, and the node N3 Is directly connected to the VSS terminal of the integrated circuit (IC). In addition, the node N1 is connected to the SENS terminal of the integrated circuit IC through the resistor R1. The node N3 is connected to the node N4 through a series connection of the switch elements SW1 and SW2. The node N4 is connected to the VM terminal of the integrated circuit IC through the resistor R4. The integrated circuit IC switches and controls the switch element SW1 through the DO terminal and switches and controls the switch element SW2 through the CO terminal.
집적회로(IC)는 커패시터(C1, C2)를 통하여 전지셀(BT1, BT2)의 각 셀단자전압을 측정하고저항(R3)를 통하여 전지셀 직렬연결의 단자전압을 측정한다. 또한, 저항(R4)를 통하여 충반전 전류값을 측정한다. 이와 같은 측정값들에 응답하여 과충전 문턱전압 검출시에는 스위치 소자(SW1)를 턴오프시켜서 과충전을 방지하고, 과방전 문턱전압 검출시에는 스위치 소자(SW2)를 턴오프시켜서 과방전을 방지한다.The integrated circuit IC measures the voltage of each cell terminal of the battery cells BT1 and BT2 through the capacitors C1 and C2 and the terminal voltage of the battery cell series connection through the resistor R3. In addition, the charge / discharge current value is measured through the resistor R4. In response to the measured values, the overcharge threshold voltage is turned off when the overcharge threshold voltage is detected, and the overcharge is prevented when the overdischarge threshold voltage is detected.
노드(N1)는 병렬연결된 P 형 필드효과트랜지스터(FET1, FET2)를 통하여 팩 플러스 전극(14c)에 연결되고, 노드(N4)는 팩 마이너스 전극(14b)에 연결된다.The node N1 is connected to the pack plus electrode 14c through the P-type field effect transistors FET1 and FET2 connected in parallel, and the node N4 is connected to the pack minus electrode 14b.
FET1의 드레인 전극은 팩 플러스 전극(14c)에 연결되고, 소오스 전극은 노드(N1)에 연결되고, 게이트 전극은 정전압 제어회로(30)에 연결된다. FET1은 드레인전극과 소오스 전극 사이에 연결된 다이오드(D1)를 포함한다.The drain electrode of FET1 is connected to pack plus electrode 14c, the source electrode is connected to node N1, and the gate electrode is connected to constant voltage control circuit 30. FET1 includes a diode D1 connected between the drain electrode and the source electrode.
FET2의 드레인 전극은 팩 플러스 전극(14c)에 연결되고, 소오스 전극은 노드(N1)에 연결되고, 게이트 전극은 충전 및 감시모드 설정회로(40)에 연결된다. FET2는 드레인 전극과 소오스 전극 사이에 연결된 다이오드(D2)를 포함한다.The drain electrode of the FET2 is connected to the pack plus electrode 14c, the source electrode is connected to the node N1, and the gate electrode is connected to the charging and monitoring mode setting circuit 40. FET2 includes a diode D2 connected between the drain electrode and the source electrode.
정전압 제어회로(30)는 비교기(U1), 저항(R5~R9), 기준전압 발생기(U2)를 포함한다. 저항(R6, R7)은 팩 플러스 전극(14c)와 팩 마이너스 전극(14b) 사이에 직렬로 연결된 분배수단을 구성하고 출력전압을 저항 분압하여 분압신호를 노드(N5)에 발생한다. 노드(N5)는 비교기(U1)의 비반전단자(+)에 연결된다.The constant voltage control circuit 30 includes a comparator U1, resistors R5 to R9, and a reference voltage generator U2. The resistors R6 and R7 constitute a distribution means connected in series between the pack plus electrode 14c and the pack minus electrode 14b, and resistor divide the output voltage to generate a divided signal at the node N5. The node N5 is connected to the non-inverting terminal + of the comparator U1.
기준전압 발생부(U2)는 노드(N6)와 노드(N4) 사이에 연결되고 노드(N6)는 저항(R4)을 통하여 노드(N1)에 연결된다. 따라서 기준전압 발생부(U2)는 노드(N7)에 소정의 기준전압을 발행한다.The reference voltage generator U2 is connected between the node N6 and the node N4, and the node N6 is connected to the node N1 through the resistor R4. Therefore, the reference voltage generator U2 issues a predetermined reference voltage to the node N7.
노드(N6) 및 노드(N4) 사이에는 저항(R8, R9)이 직렬로 연결되고 노드(N6)는 비교기(U1)의 반전단자(-)에 연결된다.The resistors R8 and R9 are connected in series between the node N6 and the node N4, and the node N6 is connected to the inverting terminal (-) of the comparator U1.
따라서, 정전압 제어회로(30)는 출력전압을 검출한 분압신호와 노드(N6)의 기준전압을 비교하여 두 전압 차에 따라 FET1의 소오스 및 게이트 전압(Vgs)을 콘트롤하여 FET1의 드레인 전류를 제어한다. 즉, 정전압 제어회로는 출력전압이 일정 전압 레벨로 유지하도록 FET1의 게이트 전압을 제어하여 드레인 전류, 즉 방전전류를 제어한다.Therefore, the constant voltage control circuit 30 controls the drain current of the FET1 by comparing the divided signal detecting the output voltage with the reference voltage of the node N6 and controlling the source and gate voltages Vgs of the FET1 according to the two voltage differences. do. That is, the constant voltage control circuit controls the drain current, that is, the discharge current by controlling the gate voltage of the FET1 so that the output voltage is maintained at a constant voltage level.
충전 및 감시모드 설정회로(40)는 비교기(U3), 저항(R10, R11), 온도센서, 서미스터(TH)를 포함한다. 저항(R10, R11)의 직렬연결은 노드(N6) 및 노드(N4) 사이에 연결된다. 따라서 저항(R10, R11)은 노드(N6)의 전압신호를 저항 분압하여 분압된 신호를 기준신호로 비교기(U3)의 비반전단자(+)에 연결한다.The charging and monitoring mode setting circuit 40 includes a comparator U3, resistors R10 and R11, a temperature sensor, and a thermistor TH. The series connection of resistors R10 and R11 is connected between node N6 and node N4. Accordingly, the resistors R10 and R11 divide the voltage signal of the node N6 by resistance resistance and connect the divided signal to the non-inverting terminal (+) of the comparator U3 as a reference signal.
비교기(U3)의 반전단자(-)는 감시전극(14a)에 연결되고, 감시전극(14a)과 노드(N4) 사이에는 서미스터(TH)가 연결된다.The inverting terminal (-) of the comparator U3 is connected to the monitoring electrode 14a, and the thermistor TH is connected between the monitoring electrode 14a and the node N4.
따라서 전지팩이 충전기에 장착된 경우 충전기회로에서는 감시전극(14a)을통하여 전지팩의 내부 온도 값을 감시하고 전지팩의 장착유무를 검출한다.Therefore, when the battery pack is mounted in the charger, the charger circuit monitors the internal temperature value of the battery pack through the monitoring electrode 14a and detects whether the battery pack is installed.
통상시에는 비교기(U3)의 반전단자(-)는 서미스터를 통하여 전지팩의 마이너스 전극과 연결된 상태이므로 비교기(U3)의 출력은 하이상태를 유지하므로 FET2는 턴오프된 상태를 유지한다.Normally, since the inverting terminal (-) of the comparator U3 is connected to the negative electrode of the battery pack through the thermistor, the output of the comparator U3 is kept high, so the FET2 is turned off.
엔지니어 또는 개발자가 감시전극(14a)의 반전단자(-)에 비반전단자(+)에 인가되는 분압신호 보다 높은 전압신호를 인가하면, 비교기(U3)의 출력이 로우 상태로 되므로 FET2는 턴온 상태로 동작하게 된다. FET2는 FET1과는 달리 스위칭 동작으로 완전 개방상태가 되므로 팩 플러스전극(14c)과 노드(N1)를 직접 연결한 것과 유사한 감시 패스를 형성하게 된다. 그러므로 개발자나 엔지니어는 이와 같은 상태에서 내부 단자전압을 정확하게 측정할 수 있게 된다.When the engineer or developer applies a voltage signal higher than the voltage dividing signal applied to the non-inverting terminal (+) to the inverting terminal (-) of the monitoring electrode 14a, the output of the comparator U3 is turned low, so the FET2 is turned on. Will work. Unlike FET1, FET2 is completely opened by switching operation, thus forming a monitoring path similar to a direct connection between the pack plus electrode 14c and the node N1. Therefore, the developer or engineer can accurately measure the internal terminal voltage in this state.
또한, FET2를 통하여 충전패스를 형성함으로써 FET1을 통하는 경우에 비해 충전전류를 충분히 공급할 수 있으므로 충전시간을 단축할 수 있다.In addition, since the charging path is formed through the FET2, the charging current can be sufficiently supplied as compared with the case through the FET1, thereby reducing the charging time.
본 발명에서는 정전압 제어되는 방전 패스와 별도로 완전 개방되는 충전 및 감시 패스를 구성함으로써 내부 전지셀들의 단자전압을 정확하게 측정할 수 있고, 충전시간을 단축할 수 있다.In the present invention, the terminal voltage of the internal battery cells can be accurately measured and the charging time can be shortened by configuring a charging and monitoring path that is completely opened separately from the discharge path under constant voltage control.
상술한 바와 같이, 본 발명의 바람직한 실시 예를 참조하여 설명하였지만 해당 기술 분야의 숙련된 당업자라면 하기의 특허청구의 범위에 기재된 본 발명의 사상 및 영역으로부터 벗어나지 않는 범위 내에서 본 발명을 다양하게 수정 및 변경시킬 수 있음을 이해할 수 있을 것이다.As described above, although described with reference to a preferred embodiment of the present invention, those skilled in the art will be variously modified without departing from the spirit and scope of the invention described in the claims below. And can be changed.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007069860A1 (en) * | 2005-12-15 | 2007-06-21 | Lg Chem, Ltd. | Multi battery pack system, control method thereof, and battery pack using the same |
| KR100880703B1 (en) * | 2006-02-17 | 2009-02-02 | 가부시키가이샤 리코 | Semiconductor integrated circuit for controlling charge and appratus for charging secondary battery using the same |
| KR100884841B1 (en) * | 2006-02-28 | 2009-02-20 | 가부시키가이샤 리코 | Integrated circuit for controlling charging, charging device using the integrated circuit, and method for detecting connection of secondary battery |
| US8334674B2 (en) | 2007-01-17 | 2012-12-18 | Samsung Sdi Co., Ltd. | Hybrid battery and its charging/discharging method |
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2003
- 2003-06-02 KR KR10-2003-0035397A patent/KR100506016B1/en not_active IP Right Cessation
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007069860A1 (en) * | 2005-12-15 | 2007-06-21 | Lg Chem, Ltd. | Multi battery pack system, control method thereof, and battery pack using the same |
| KR100880703B1 (en) * | 2006-02-17 | 2009-02-02 | 가부시키가이샤 리코 | Semiconductor integrated circuit for controlling charge and appratus for charging secondary battery using the same |
| KR100884841B1 (en) * | 2006-02-28 | 2009-02-20 | 가부시키가이샤 리코 | Integrated circuit for controlling charging, charging device using the integrated circuit, and method for detecting connection of secondary battery |
| US8334674B2 (en) | 2007-01-17 | 2012-12-18 | Samsung Sdi Co., Ltd. | Hybrid battery and its charging/discharging method |
| US8803479B2 (en) | 2007-01-17 | 2014-08-12 | Samsung Sdi Co., Ltd. | Hybrid battery and its charging/discharging method |
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