KR20130068308A - Apparatus for detecting wire disconnection of secondary battery - Google Patents

Apparatus for detecting wire disconnection of secondary battery Download PDF

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KR20130068308A
KR20130068308A KR1020110135342A KR20110135342A KR20130068308A KR 20130068308 A KR20130068308 A KR 20130068308A KR 1020110135342 A KR1020110135342 A KR 1020110135342A KR 20110135342 A KR20110135342 A KR 20110135342A KR 20130068308 A KR20130068308 A KR 20130068308A
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battery
disconnection
cell
voltage
voltage difference
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KR1020110135342A
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Korean (ko)
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KR101889558B1 (en
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박상칠
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현대모비스 주식회사
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Priority to CN201210297070.9A priority patent/CN103165951B/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/392—Determining battery ageing or deterioration, e.g. state of health
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • 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
    • G01R19/10—Measuring sum, difference or ratio
    • 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
    • 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
    • G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
    • G01R31/3835—Arrangements for monitoring battery or accumulator variables, e.g. SoC involving only voltage measurements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/58—Testing of lines, cables or conductors
    • 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
    • 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

PURPOSE: An apparatus for detecting wire-disconnection of a secondary battery is provided to detect disconnection of all connection lines connected to battery cells and detects a position of a disconnected line, thereby improving safety of a secondary battery. CONSTITUTION: An apparatus for detecting wire-disconnection of a secondary battery comprises a battery pack(10) in which a plurality of battery modules consisting of battery cells is serially connected to each other by a busbar(16); and a control device(20) which comprises a cell voltage measuring unit(22) which measure a voltage of each battery cell and voltages of both ends of the busbar, and a wire-disconnection detecting unit(24) which determines wire-disconnection of lines connected to the battery cells using the voltages measured by the cell voltage measuring unit and detects a disconnected position of lines.

Description

이차전지 배터리의 단선검출장치{Apparatus for detecting wire disconnection of secondary battery}Apparatus for detecting wire disconnection of secondary battery

본 발명은 이차전지 배터리의 단선검출장치에 관한 것으로, 구체적으로는 배터리 셀에 연결되는 연결라인의 단선을 검출함으로써 안전성을 향상할 수 있는 이차전지 배터리의 단선검출장치에 관한 것이다.The present invention relates to a disconnection detection device for a secondary battery battery, and more particularly, to a disconnection detection device for a secondary battery battery capable of improving safety by detecting disconnection of a connection line connected to a battery cell.

하이브리드, 전기차로 대표되는 친환경차량의 경우 차량을 구동하는 구동모터의 에너지원으로 이차전지 배터리를 사용한다. 이러한 이차전지 배터리는 복수개의 단위 배터리셀로 구성된 배터리모듈로 이루어진다.In the case of eco-friendly vehicles represented by hybrids and electric vehicles, secondary battery batteries are used as energy sources of driving motors driving vehicles. The secondary battery battery is composed of a battery module consisting of a plurality of unit battery cells.

종래 이차전지 배터리의 단선검출장치는 복수의 배터리 셀에 연결되는 복수의 연결라인의 단선을 검출함으로써 배터리모듈의 안전성을 향상시킨다. 즉 종래 이차전지 배터리의 단선검출장치는 주로 배터리셀들이 직렬로 연결된 경우 배터리셀들 사이의 연결에 단선이 있는지 검출하는 구성을 적용하고 있다.The disconnection detection device of a conventional secondary battery battery improves safety of a battery module by detecting disconnection of a plurality of connection lines connected to a plurality of battery cells. That is, the disconnection detection device of the conventional secondary battery battery mainly applies a configuration for detecting whether there is a disconnection in the connection between the battery cells when the battery cells are connected in series.

그러나 이러한 종래 이차전지 배터리의 단선검출장치는 배터리셀들 사이의 단선여부는 검출 가능하지만, 직렬 연결된 배터리셀들의 최종 출력단의 단선여부를 검출하는 데는 한계를 가지고 있어, 이차전지 배터리의 안전성을 떨어뜨리는 요인이 될 수 있다.However, although the disconnection detection device of the conventional secondary battery battery detects disconnection between the battery cells, it has a limit in detecting disconnection of the final output terminal of the battery cells connected in series, thereby reducing the safety of the secondary battery battery. It can be a factor.

KR 10-2011-0075225 A, 2011. 07. 06, 도면 2KR 10-2011-0075225 A, 2011. 07. 06, drawing 2

본 발명의 목적은 배터리셀에 연결되는 연결라인들 모두에 대한 단선을 감지하고, 단선의 위치까지 파악함으로써 배터리의 안정성이 향상될 수 있는 이차전지 배터리의 단선검출장치를 제공하는 것이다.An object of the present invention is to provide a disconnection detection device of a secondary battery battery that can improve the stability of the battery by detecting the disconnection of all the connection lines connected to the battery cell, and even grasp the location of the disconnection.

상기 목적을 달성하기 위한 본 발명은 이차전지 배터리의 단선검출장치에 관한 것으로, 본 이차전지 배터리의 단선검출장치는 배터리셀들로 이루어진 배터리모듈이 다수개 구비되어 버스바(BUSBAR)에 의해 직렬로 연결되는 배터리팩; 및 상기 배터리셀들 각각의 전압 및 상기 버스바(BUSBAR) 양단의 전압을 측정하는 셀전압측정부와, 상기 셀전압측정부에 의해 측정된 전압값들을 이용하여 상기 배터리셀들에 연결되는 연결라인들의 단선여부 및 상기 연결라인들 중 단선된 연결라인의 위치를 검출하는 단선검출부를 구비하는 제어장치를 포함하는 것을 특징으로 한다.The present invention for achieving the above object relates to a disconnection detection device of a secondary battery battery, the disconnection detection device of the secondary battery battery is provided with a plurality of battery modules consisting of battery cells in series by a bus bar (BUSBAR) A battery pack connected to the battery pack; And a connection line connected to the battery cells using a cell voltage measuring unit measuring a voltage of each of the battery cells and a voltage across the bus bar BUSBAR, and voltage values measured by the cell voltage measuring unit. It characterized in that it comprises a control device having a disconnection detection unit for detecting the disconnection of the connection line and the position of the disconnected connection line of the connection lines.

상기 단선검출부는, 상기 배터리팩의 최하단 배터리셀과 상기 배터리팩의 최하단 배터리셀의 다음 상측에 접한 배터리셀 간의 제1 전압 차이값을 산출하고 상기 제1 전압 차이값이 사전에 정해진 제1 범위 내에 속하는 경우 상기 배터리팩의 최하단 배터리셀의 연결라인이 단선된 것으로 판단할 수 있다.The disconnection detecting unit calculates a first voltage difference value between the lowest battery cell of the battery pack and a battery cell in contact with a next upper side of the lowest battery cell of the battery pack, and the first voltage difference value is within a predetermined first range. If it belongs, it may be determined that the connection line of the lowest battery cell of the battery pack is disconnected.

상기 단선검출부는, 상기 배터리모듈 내에서 서로 접한 배터리셀들 간의 제2 전압 차이값들을 산출하고, 상기 산출된 제2 전압 차이값들 각각이 사전에 정해진 제2 범위 내에 속하는 지 판단하며, 상기 제2 범위 내에 속하는 것으로 판단된 제2 전압 차이값을 산출한 배터리셀들 사이에 연결된 연결라인이 단선된 것으로 판단할 수 있다.The disconnection detector calculates second voltage difference values between battery cells in contact with each other in the battery module, determines whether each of the calculated second voltage difference values falls within a second predetermined range, It may be determined that the connection line connected between the battery cells having calculated the second voltage difference value determined to fall within the two ranges is disconnected.

상기 단선검출부는, 상기 배터리모듈들이 상기 버스바의 일단에 연결된 상측 배터리모듈과 상기 버스바의 타단에 연결된 하측 배터리모듈로 이루어진 경우, 상기 상측 배터리모듈의 최하단 배터리셀과 상기 상측 배터리모듈의 최하단 배터리셀의 다음 상측에 접한 배터리셀 간의 제3 전압 차이값을 산출하고 상기 제3 전압 차이값이 사전에 정해진 제3 범위 내에 속하고 상기 버스바의 양단의 전압값이 사전에 정해진 제1 버스바전압 범위 내에 속하는 경우 상기 상측 배터리모듈의 최하단 배터리셀의 연결라인이 단선된 것으로 판단할 수 있다.The disconnection detecting unit may include a lower battery cell of the upper battery module and a lower battery of the upper battery module when the battery modules are formed of an upper battery module connected to one end of the bus bar and a lower battery module connected to the other end of the bus bar. Calculating a third voltage difference value between the battery cells in contact with the next upper side of the cell, wherein the third voltage difference value is within a predetermined third range and a voltage value of both ends of the busbar is a predetermined first busbar voltage; If it is within the range it can be determined that the connection line of the lowermost battery cell of the upper battery module is disconnected.

상기 단선검출부는, 상기 배터리모듈들이 상기 버스바의 일단에 연결된 상측 배터리모듈과 상기 버스바의 타단에 연결된 하측 배터리모듈로 이루어진 경우, 상기 하측 배터리모듈의 최상단 배터리셀과 상기 하측 배터리모듈의 최상단 배터리셀의 다음 하측에 접한 배터리셀 간의 제4 전압 차이값을 산출하고 상기 제4 전압 차이값이 사전에 정해진 제4 범위 내에 속하고 상기 버스바의 양단의 전압값이 사전에 정해진 제2 버스바전압 범위 내에 속하는 경우 상기 하측 배터리모듈의 최상단 배터리셀의 연결라인이 단선된 것으로 판단할 수 있다.The disconnection detecting unit may include an upper battery module connected to one end of the bus bar and a lower battery module connected to the other end of the bus bar, the uppermost battery cell of the lower battery module and the uppermost battery of the lower battery module. Calculating a fourth voltage difference value between the battery cells in contact with the next lower side of the cell, the fourth voltage difference value being within a predetermined fourth range, and a voltage value at both ends of the busbar being predetermined; If it is within the range it can be determined that the connection line of the top battery cell of the lower battery module is disconnected.

본 발명은 배터리모듈간의 연결 구조인 버스바 양단의 전압을 센싱하고, 배터리모듈 내의 배터리셀의 모든 연결라인의 단선을 검출하며, 단선된 위치까지 파악하여 더욱 정확한 단선검출을 수행함으로써 배터리의 안정성을 향상할 수 있다.The present invention senses the voltage at both ends of the bus bar, the connection structure between the battery modules, detects the disconnection of all the connection lines of the battery cells in the battery module, and detects the disconnected position to perform more accurate disconnection detection, thereby ensuring the stability of the battery. Can improve.

도 1은 본 발명의 일 실시예들에 따른 이차전지 배터리의 단선검출장치의 블록도이다.
도 2는 본 발명의 일 실시예에 따른 단선검출부의 기능 블록도이다.1 is a block diagram of an apparatus for detecting a disconnection of a secondary battery battery according to an exemplary embodiment of the present invention.
2 is a functional block diagram of a disconnection detecting unit according to an exemplary embodiment of the present invention.

이하 첨부된 도면들을 참조하여 본 발명의 일 실시예에 따른 이차전지 배터리의 단선검출장치에 대해 설명한다.Hereinafter, an apparatus for detecting disconnection of a rechargeable battery battery according to an exemplary embodiment of the present invention will be described with reference to the accompanying drawings.

도 1은 본 발명의 일 실시예에 따른 이차전지 배터리의 단선검출장치의 개념 블록도이다. 도 1에 도시된 바와 같이, 이차전지 배터리의 단선검출장치(1)는 크게 배터리팩(10) 및 제어장치(20)로 구분될 수 있다.1 is a conceptual block diagram of an apparatus for detecting disconnection of a secondary battery battery according to an exemplary embodiment of the present invention. As shown in FIG. 1, the disconnection detection device 1 of the secondary battery battery may be largely divided into a battery pack 10 and a control device 20.

배터리팩(10)은 배터리셀(124,144)들로 이루어진 배터리모듈(12,14)이 다수개 구비되어 버스바(BUSBAR,16)에 의해 직렬로 연결된다. 도 1에서는 배터리모듈(12,14)이 상측 배터리모듈(12)과 하측 배터리모듈(14)로 2개가 나타나 있으나, 2개 이상 복수 개로 마련될 수 있다. 여기서 버스바(16)는 일단이 상측 배터리모듈(12)의 최하단의 배터리셀(124,144)에 연결되고, 타단이 하측 배터리모듈(14)의 최상단의 배터리셀(124,144)에 연결된다.The battery pack 10 includes a plurality of battery modules 12 and 14 formed of battery cells 124 and 144 and is connected in series by a bus bar BUSBAR 16. In FIG. 1, two battery modules 12 and 14 are illustrated as an upper battery module 12 and a lower battery module 14, but two or more battery modules 12 and 14 may be provided. Here, one end of the bus bar 16 is connected to the lowermost battery cells 124 and 144 of the upper battery module 12, and the other end is connected to the uppermost battery cells 124 and 144 of the lower battery module 14.

제어장치(20)는 셀전압측정부(22)와 단선검출부(24)를 구비할 수 있다. 셀전압측정부(22)는 배터리모듈(12,14)의 각 배터리셀(124,144)들의 전압(V1,V2,V3,V4)과 버스바(16) 양단의 전압(BUSBAR_V)을 측정하여 단선검출부(24)로 전달한다.The control device 20 may include a cell voltage measuring unit 22 and a disconnection detecting unit 24. The cell voltage measuring unit 22 measures the voltages V1, V2, V3 and V4 of the battery cells 124 and 144 of the battery modules 12 and 14 and the voltage BUSBAR_V across the bus bars 16 to detect the disconnection. To 24.

이와 같이 단선검출부(24)는 셀전압측정부(22)에 의해 측정된 전압값들을 이용하여 배터리셀(124,144)들에 연결되는 연결라인들의 단선여부 및 단선된 연결라인의 위치를 검출할 수 있다.As such, the disconnection detection unit 24 may detect whether disconnection of the connection lines connected to the battery cells 124 and 144 and the location of the disconnected connection line are performed using the voltage values measured by the cell voltage measurement unit 22. .

표 1은 배터리셀(124,144)의 연결라인의 단선이 없는 정상상태에서의 측정값의 예이다. 표 1에 나타난 'M1'은 도 1의 하측 배터리모듈(14)을 가르키고, 'M2'는 도 1의 상측 배터리모듈(12)을 가르킨다.Table 1 shows an example of measured values in a steady state without disconnection of the connection lines of the battery cells 124 and 144. 'M1' shown in Table 1 indicates the lower battery module 14 of FIG. 1, and 'M2' indicates the upper battery module 12 of FIG.

Figure pat00001
Figure pat00001

단선검출부(24)는 셀전압측정부(22)로부터 전달된 전압의 측정결과를 이용하여 배터리셀(124,144)의 연결라인 단선여부와 단선된 연결라인의 위치를 판단할 수 있다.The disconnection detector 24 may determine whether the connection line of the battery cells 124 and 144 is disconnected from the disconnected connection line by using the measurement result of the voltage transmitted from the cell voltage measurement unit 22.

단선검출부(24)는 연결라인 단선여부와 단선된 연결라인의 위치 판단과 관련하여 도 2에 도시된 바와 같이 4개의 로직으로 구성될 수 있다.The disconnection detecting unit 24 may be configured with four logics as shown in FIG. 2 in relation to the determination of whether the connection line is disconnected or disconnected.

도 2의 배터리팩 최하단 라인 단선 판단로직(242)은 셀전압측정부(22)에 의한 전압 측정결과를 이용하여 배터리팩(10)의 최하단 배터리셀(144)과 배터리팩(10)의 최하단 배터리셀(144)의 다음 상측에 접한 배터리셀(144) 간의 제1 전압 차이값을 산출한다. 그리고 산출된 제1 전압 차이값이 사전에 정해진 제1 범위 내에 속하는 경우 배터리팩(10)의 최하단 배터리셀(144)의 라인이 단선된 것으로 판단한다.The lowest line disconnection determination logic 242 of FIG. 2 uses the voltage measurement result of the cell voltage measuring unit 22 to determine the lowest battery cell 144 of the battery pack 10 and the lowest battery of the battery pack 10. The first voltage difference value between the battery cells 144 in contact with the next upper side of the cell 144 is calculated. When the calculated first voltage difference value falls within a predetermined first range, it is determined that the line of the lowermost battery cell 144 of the battery pack 10 is disconnected.

Figure pat00002
Figure pat00002

예를 들면, 위의 표 2에 나타난 바와 같이, 하측 배터리모듈(14)의 최하단 배터리셀(144)의 전압(V1) 값과 이에 접한 상측 배터리셀(144)의 전압(V2) 값이, 'V1'은 '0'이고 'V2'는 '2.561'로 측정된 경우, 제1 전압 차이값은 '2.561'로 산출된다.For example, as shown in Table 2 above, the value of the voltage V1 of the lowermost battery cell 144 of the lower battery module 14 and the value of the voltage V2 of the upper battery cell 144 in contact therewith, When V1 'is measured as' 0' and 'V2' is measured as' 2.561 ', the first voltage difference value is calculated as' 2.561'.

위에서 산출된 제1 전압 차이값 '2.561'이 단선판단을 위해 설정된 제1 범위에 포함된 경우, 배터리팩 최하단 라인 단선 판단로직(242)은 배터리팩(10)의 최하단 배터리셀(144)의 연결라인 'L1'이 단선된 것으로 판단할 수 있다.When the first voltage difference value '2.561' calculated above is included in the first range set for disconnection determination, the lowest line disconnection determination logic 242 of the battery pack is connected to the lowest battery cell 144 of the battery pack 10. It can be determined that the line 'L1' is disconnected.

도 2의 셀간 중복라인 단선 판단로직(244)은 배터리모듈(12,14) 내의 서로 접한 배터리셀(124,144)들 간의 제2 전압 차이값들을 산출하고 산출된 제2 전압 차이값들 각각이 사전에 정해진 제2 범위 내에 속하는 지 판단하며, 제2 범위 내에 속하는 것으로 판단된 제2 전압 차이값을 산출한 배터리셀(124,144)들 사이에 연결된 연결라인이 단선된 것으로 판단한다.The overlapping line disconnection determination logic 244 of FIG. 2 calculates second voltage difference values between the battery cells 124 and 144 in contact with each other in the battery modules 12 and 14, and each of the calculated second voltage difference values is previously determined. It is determined whether it is within the predetermined second range, and it is determined that the connection line connected between the battery cells 124 and 144 that has calculated the second voltage difference value determined to be within the second range is disconnected.

Figure pat00003
Figure pat00003

예를 들면, 위의 표 3에 나타난 측정값들을 이용하면, 하측 배터리모듈(14)의 배터리셀(144)들 각각에 대하여 서로 접한 배터리셀(144)들 간의 제2 전압 차이값들, 'V1-V2', 'V2-V3' 및 'V3-V4' 각각은 '2.409', '0.020', '0.002'로 산출된다.For example, using the measured values shown in Table 3 above, for each of the battery cells 144 of the lower battery module 14, the second voltage difference values between the battery cells 144, which are in contact with each other, 'V1. -V2 ',' V2-V3 'and' V3-V4 'are respectively calculated as' 2.409', '0.020' and '0.002'.

위에서 산출된 제2 전압 차이값들 중 '2.409'가 단선판단을 위해 설정된 제2 범위에 포함되고, 이 값을 산출한 배터리셀(144)들이 하측 배터리모듈(14)의 최하단 배터리셀(144)과 바로 상측에 접한 배터리셀(144)인 경우, 셀간 중복라인 단선 판단로직(244)은 이 배터리셀(144)들 사이에 연결된 연결라인 'L2'가 단선된 것으로 판단한다.Of the second voltage difference values calculated above, '2.409' is included in the second range set for disconnection determination, and the battery cells 144 that calculate the value are the lowermost battery cells 144 of the lower battery module 14. In the case of the battery cell 144 directly in contact with the upper side, the overlapping line disconnection determination logic 244 between the cells determines that the connection line 'L2' connected between the battery cells 144 is disconnected.

도 2의 상측 배터리모듈 최하단 라인 단선 판단로직(246)은 배터리모듈(12,14)이 도 1에 도시된 바와 같이 버스바(16)의 일단에 연결된 상측 배터리모듈(12)과 버스바(16)의 타단에 연결된 하측 배터리모듈(14)로 이루어진 경우, 상측 배터리모듈(12)의 최하단의 배터리셀(124)과 상측 배터리모듈(12)의 최하단 배터리셀(124)의 다음 상측에 접한 배터리셀(124) 간의 제3 전압 차이값을 산출한다.The uppermost line disconnection determination logic 246 of the upper battery module of FIG. 2 has the upper battery module 12 and the busbar 16 connected to one end of the bus bar 16 as shown in FIG. 1. When the lower battery module 14 is connected to the other end of the), the lowermost battery cell 124 of the upper battery module 12 and the battery cell in contact with the next upper side of the lowermost battery cell 124 of the upper battery module 12 The third voltage difference value between 124 is calculated.

그리고 제3 전압 차이값이 사전에 정해진 제3 범위 내에 속하고 버스바(16)의 양단의 전압값이 사전에 정해진 제1 버스바전압 범위 내에 속하는 경우, 상측 배터리모듈 최하단 라인 단선 판단로직(246)은 상측 배터리모듈(12)의 최하단 배터리셀(124)의 연결라인이 단선된 것으로 판단한다.When the third voltage difference value is within a predetermined third range and the voltage value of both ends of the busbar 16 is within a predetermined first busbar voltage range, the lower line disconnection determination logic of the upper battery module 246 ) Determines that the connection line of the lowermost battery cell 124 of the upper battery module 12 is disconnected.

Figure pat00004
Figure pat00004

예를 들면, 위의 표 4에 나타난 바와 같이, 상측 배터리모듈(12)의 최하단의 배터리셀(124)의 전압값(V1)과 최하단 배터리셀(124)의 다음 상측에 접한 배터리셀(124)의 전압값(V2)이 각각 '0.165' 및 '2.567'인 경우, 제3 전압 차이값은 '2.402'로 산출된다. 그리고, 버스바(16)의 양단 전압값은 표 4에 나타난 바와 같이 '2.311'로 측정될 수 있다.For example, as shown in Table 4 above, the battery cell 124 in contact with the voltage value V1 of the lowermost battery cell 124 of the upper battery module 12 and the next upper side of the lowermost battery cell 124. When the voltage values V2 are '0.165' and '2.567', respectively, the third voltage difference value is calculated as '2.402'. And, the voltage value of both ends of the bus bar 16 may be measured as '2.311' as shown in Table 4.

위에서 산출된 제3 전압 차이값 '2.402'가 단선판단을 위해 설정된 제3 범위에 포함되고, 버스바(16)의 측정전압인 '2.311'이 단선판단을 위해 설정된 제1 버스바전압 범위에 포함된 경우, 상측 배터리모듈 최하단 라인 단선 판단로직(246)은 상측 배터리모듈(12)의 최하단 배터리셀(124)의 라인인 'L6'이 단선된 것으로 판단한다.The third voltage difference value '2.402' calculated above is included in the third range set for the disconnection determination, and the measured voltage '2.311' of the busbar 16 is included in the first busbar voltage range set for the disconnection determination. In this case, the lower line disconnection determination logic 246 of the upper battery module determines that 'L6', which is a line of the lowermost battery cell 124 of the upper battery module 12, is disconnected.

도 2의 하측 배터리모듈 최상단 라인 단선 판단로직(248)은 하측 배터리모듈(14)의 최상단의 배터리셀(144)과 하측 배터리모듈(14)의 최상단 배터리셀(144)의 다음 하측에 접한 배터리셀(144) 간의 제4 전압 차이값을 산출한다.The bottom line disconnection determination logic 248 of FIG. 2 is a battery cell in contact with the lower side of the battery cell 144 at the top of the lower battery module 14 and the lower battery cell 144 at the bottom of the lower battery module 14. A fourth voltage difference value between 144 is calculated.

그리고 제4 전압 차이값이 사전에 정해진 제4 범위 내에 속하고 버스바(16)의 양단의 전압값이 사전에 정해진 제2 버스바전압 범위 내에 속하는 경우, 하측 배터리모듈 최상단 라인 단선 판단로직(248)은 하측 배터리모듈(14)의 최상단 배터리셀(144)의 연결라인이 단선된 것으로 판단한다.When the fourth voltage difference value is within the fourth predetermined range and the voltage value between both ends of the bus bar 16 is within the second predetermined bus bar voltage range, the uppermost line disconnection determination logic 248 of the lower battery module is determined. ) Determines that the connection line of the uppermost battery cell 144 of the lower battery module 14 is disconnected.

Figure pat00005
Figure pat00005

예를 들면, 위의 표 5에 나타난 바와 같이, 하측 배터리모듈(14)의 최상단의 배터리셀(144)의 전압값(V4)과 다음 하측에 접한 배터리셀의 전압값(V3)이 각각 '0' 및 '2.564'인 경우, 제4 전압 차이값은 '2.564'로 산출된다. 그리고, 버스바(16)의 양단 전압값은 표 5에 나타난 바와 같이 '2.556'으로 측정될 수 있다.For example, as shown in Table 5 above, the voltage value V4 of the battery cell 144 at the top of the lower battery module 14 and the voltage value V3 of the battery cell in contact with the next lower side are respectively '0'. 'And' 2.564 ', the fourth voltage difference value is calculated as' 2.564'. In addition, the voltage value at both ends of the bus bar 16 may be measured as '2.556' as shown in Table 5.

위에서 산출된 제4 전압 차이값 '2.564'가 단선판단을 위해 설정된 제4 범위에 포함되고, 버스바(16)의 측정전압인 '2.556'이 단선판단을 위해 설정된 제2 버스바전압 범위에 포함된 경우, 하측 배터리모듈 최상단 라인 단선 판단로직(248)은 하측 배터리모듈(14)의 최상단의 배터리셀(144)의 연결라인, 'L5'가 단선된 것으로 판단한다.The fourth voltage difference value '2.564' calculated above is included in the fourth range set for the disconnection determination, and the measured voltage '2.556' of the busbar 16 is included in the second busbar voltage range set for the disconnection determination. In this case, the uppermost line disconnection determination logic 248 of the lower battery module determines that the connection line 'L5' of the uppermost battery cell 144 of the lower battery module 14 is disconnected.

이와 같이, 본 발명의 일 실시예에 따른 이차전지 배터리의 단선검출장치()은, 배터리모듈(12,14)간의 연결 구조인 버스바(16) 양단의 전압을 센싱하고, 배터리모듈(12,14) 내의 배터리셀(124,144)의 모든 연결라인의 단선을 검출하며, 단선된 위치까지 파악함으로써 더욱 정확한 단선검출을 수행할 수 있다.As described above, the disconnection detection device () of the secondary battery battery according to an embodiment of the present invention senses the voltage across the bus bar 16, which is a connection structure between the battery modules 12 and 14, and detects the battery module 12,. The disconnection of all connection lines of the battery cells 124 and 144 in 14) can be detected, and more accurate disconnection detection can be performed by identifying the disconnected position.

1: 이차전지 배터리의 단선검출장치
10: 배터리팩
12, 14: 배터리모듈
124, 144: 배터리셀
16: 버스바
20: 제어장치
22: 셀전압측정부
24: 단선검출부
242: 배터리팩 최하단 라인 단선 판단로직
244: 셀간 중복라인 단선 판단로직
246: 상측 배터리모듈 최하단 라인 단선 판단로직
248: 하측 배터리모듈 최상단 라인 단선 판단로직1: Disconnection detection device of secondary battery battery
10: Battery Pack
12, 14: battery module
124, 144: battery cell
16: busbar
20: controller
22: cell voltage measurement unit
24: disconnection detection unit
242: Bottom line disconnection logic of battery pack
244: Duplicate line disconnection decision logic between cells
246: bottom line disconnection logic of upper battery module
248: determination of top line disconnection of lower battery module

Claims (5)

배터리셀들로 이루어진 배터리모듈이 다수개 구비되어 버스바(BUSBAR)에 의해 직렬로 연결되는 배터리팩; 및
상기 배터리셀들 각각의 전압 및 상기 버스바(BUSBAR) 양단의 전압을 측정하는 셀전압측정부와, 상기 셀전압측정부에 의해 측정된 전압값들을 이용하여 상기 배터리셀들에 연결되는 연결라인들의 단선여부 및 상기 연결라인들 중 단선된 연결라인의 위치를 검출하는 단선검출부를 구비하는 제어장치;를
포함하는 것을 특징으로 하는 이차전지 배터리의 단선검출장치.A battery pack having a plurality of battery modules formed of battery cells and connected in series by a bus bar (BUSBAR); And
A cell voltage measuring unit measuring a voltage of each of the battery cells and a voltage across the bus bar BUSBAR, and connection lines connected to the battery cells using voltage values measured by the cell voltage measuring unit. A control device having a disconnection detection unit for detecting disconnection and a position of disconnected connection lines among the connection lines;
Disconnection detection device of a secondary battery battery, characterized in that it comprises a. 제1항에 있어서,
상기 단선검출부는, 상기 배터리팩의 최하단 배터리셀과 상기 배터리팩의 최하단 배터리셀의 다음 상측에 접한 배터리셀 간의 제1 전압 차이값을 산출하고 상기 제1 전압 차이값이 사전에 정해진 제1 범위 내에 속하는 경우 상기 배터리팩의 최하단 배터리셀의 연결라인이 단선된 것으로 판단하는 것을 특징으로 하는 이차전지 배터리의 단선검출장치.The method of claim 1,
The disconnection detecting unit calculates a first voltage difference value between the lowest battery cell of the battery pack and a battery cell in contact with a next upper side of the lowest battery cell of the battery pack, and the first voltage difference value is within a predetermined first range. Disconnection detection device of a secondary battery battery, characterized in that it is determined that the connection line of the lowest battery cell of the battery pack is disconnected. 제1항에 있어서,
상기 단선검출부는, 상기 배터리모듈 내에서 서로 접한 배터리셀들 간의 제2 전압 차이값들을 산출하고, 상기 산출된 제2 전압 차이값들 각각이 사전에 정해진 제2 범위 내에 속하는 지 판단하며, 상기 제2 범위 내에 속하는 것으로 판단된 제2 전압 차이값을 산출한 배터리셀들 사이에 연결된 연결라인이 단선된 것으로 판단하는 것을 특징으로 하는 이차전지 배터리의 단선검출장치.The method of claim 1,
The disconnection detector calculates second voltage difference values between battery cells in contact with each other in the battery module, determines whether each of the calculated second voltage difference values falls within a second predetermined range, Disconnection detection device of a secondary battery battery, characterized in that it is determined that the connection line connected between the battery cells calculated the second voltage difference value determined to fall within the two ranges. 제1항에 있어서,
상기 단선검출부는, 상기 배터리모듈들이 상기 버스바의 일단에 연결된 상측 배터리모듈과 상기 버스바의 타단에 연결된 하측 배터리모듈로 이루어진 경우, 상기 상측 배터리모듈의 최하단 배터리셀과 상기 상측 배터리모듈의 최하단 배터리셀의 다음 상측에 접한 배터리셀 간의 제3 전압 차이값을 산출하고 상기 제3 전압 차이값이 사전에 정해진 제3 범위 내에 속하고 상기 버스바의 양단의 전압값이 사전에 정해진 제1 버스바전압 범위 내에 속하는 경우 상기 상측 배터리모듈의 최하단 배터리셀의 연결라인이 단선된 것으로 판단하는 것을 특징으로 하는 이차전지 배터리의 단선검출장치.The method of claim 1,
The disconnection detecting unit may include a lower battery cell of the upper battery module and a lower battery of the upper battery module when the battery modules are formed of an upper battery module connected to one end of the bus bar and a lower battery module connected to the other end of the bus bar. Calculating a third voltage difference value between the battery cells in contact with the next upper side of the cell, wherein the third voltage difference value is within a predetermined third range and a voltage value of both ends of the busbar is a predetermined first busbar voltage; The disconnection detection device of a secondary battery battery, characterized in that it is determined that the connection line of the lowermost battery cell of the upper battery module is disconnected within the range. 제1항에 있어서,
상기 단선검출부는, 상기 배터리모듈들이 상기 버스바의 일단에 연결된 상측 배터리모듈과 상기 버스바의 타단에 연결된 하측 배터리모듈로 이루어진 경우, 상기 하측 배터리모듈의 최상단 배터리셀과 상기 하측 배터리모듈의 최상단 배터리셀의 다음 하측에 접한 배터리셀 간의 제4 전압 차이값을 산출하고 상기 제4 전압 차이값이 사전에 정해진 제4 범위 내에 속하고 상기 버스바의 양단의 전압값이 사전에 정해진 제2 버스바전압 범위 내에 속하는 경우 상기 하측 배터리모듈의 최상단 배터리셀의 연결라인이 단선된 것으로 판단하는 것을 특징으로 하는 이차전지 배터리의 단선검출장치.The method of claim 1,
The disconnection detecting unit may include an upper battery module connected to one end of the bus bar and a lower battery module connected to the other end of the bus bar, the uppermost battery cell of the lower battery module and the uppermost battery of the lower battery module. Calculating a fourth voltage difference value between the battery cells in contact with the next lower side of the cell, the fourth voltage difference value being within a predetermined fourth range, and a voltage value at both ends of the busbar being predetermined; Disconnection detection device of a secondary battery battery, characterized in that it is determined that the connection line of the top battery cell of the lower battery module is disconnected if it falls within the range.
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