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WO2017090980A1 - Dispositif de diagnostic de fusible de batterie secondaire à haute tension - Google Patents

Dispositif de diagnostic de fusible de batterie secondaire à haute tension Download PDF

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Publication number
WO2017090980A1
WO2017090980A1 PCT/KR2016/013549 KR2016013549W WO2017090980A1 WO 2017090980 A1 WO2017090980 A1 WO 2017090980A1 KR 2016013549 W KR2016013549 W KR 2016013549W WO 2017090980 A1 WO2017090980 A1 WO 2017090980A1
Authority
WO
WIPO (PCT)
Prior art keywords
fuse
voltage
output value
high voltage
comparator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2016/013549
Other languages
English (en)
Korean (ko)
Inventor
박재동
성창현
이상훈
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LG Chem Ltd
Original Assignee
LG Chem Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by LG Chem Ltd filed Critical LG Chem Ltd
Publication of WO2017090980A1 publication Critical patent/WO2017090980A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • 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
    • G01R31/08—Locating faults in cables, transmission lines, or networks
    • 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]
    • 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
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
    • Y04S10/52—Outage or fault management, e.g. fault detection or location

Definitions

  • the present invention relates to a fuse diagnosis device for a high voltage secondary battery, and more particularly, to diagnose a fuse of a high voltage secondary battery capable of diagnosing a state of a fuse connected to a circuit through which a high voltage charge / discharge current flows, through an output signal of a comparator or an analog-digital converter. Relates to a device.
  • the secondary battery is a battery that can be charged and discharged, and is meant to include both a conventional Ni / Cd battery, a Ni / MH battery, and a recent lithium ion battery.
  • the secondary batteries lithium ion batteries have an advantage of having a much higher energy density than conventional Ni / Cd batteries, Ni / MH batteries, etc.
  • lithium ion batteries can be manufactured in a small size and tend to be used as a power source for mobile devices. .
  • the lithium ion battery has attracted attention as a next-generation energy storage medium because the range of use as an electric vehicle power source is extended.
  • the conventional high voltage battery system has a problem in that the design cost is increased because of the additional design of the isolation circuit.
  • the present invention provides a fuse diagnosis device of a new type of high voltage secondary battery capable of diagnosing a state of a fuse mounted on a path through which a high voltage current flows without affecting the insulation of the high voltage battery pack in the high voltage battery system. .
  • An apparatus for diagnosing a fuse of a high voltage secondary battery may include at least one fuse connected on a circuit path through which a high voltage charge / discharge current flows; A comparator connected to both ends of the fuse in parallel to receive a voltage at both ends of the fuse and output an output value; And a controller for diagnosing whether the fuse is defective from the output value of the comparator. It may include.
  • the ground of the fuse diagnosis device of the high voltage secondary battery may be connected to a low voltage ground.
  • the control unit may further include determining whether the output value of the comparator and the previously recorded steady state output value have the same value, and as a result of the determination, the output value of the comparator is different from the steady state output value previously recorded. In this case, the state of the fuse may be diagnosed as defective.
  • the fuse diagnostic apparatus for a high voltage secondary battery may include at least one fuse connected on a circuit path through which a high voltage charge / discharge current flows, and connected to both ends of the fuse in parallel to each other so that the voltage between the fuse
  • An analog-digital converter for receiving an input and outputting an output value;
  • a controller for diagnosing whether the fuse is defective from the output value of the analog-digital converter.
  • the ground of the fuse diagnosis device of the high voltage secondary battery may be connected to a low voltage ground.
  • a memory device in which a steady state output value, which is an output value of the analog-to-digital converter when the fuse is in a normal state, is stored in advance;
  • the control unit may further include determining whether the output value of the analog-to-digital converter and the previously recorded steady-state output value have the same value, and as a result of the determination, the steady-state output including the output value of the analog-digital converter in advance. If different from the value, it is possible to diagnose the state of the fuse as bad.
  • the fuse diagnosis apparatus of a high voltage secondary battery in diagnosing a state of a fuse mounted on a path through which a high voltage current flows, divided voltage resistors connected in series to both ends of the fuse without adding an insulation circuit may be used. Since the state of the fuse can be diagnosed through a comparator or an analog-digital converter connected in parallel with each other, the state of the fuse can be diagnosed without increasing the production cost compared to a fuse diagnosis device of a conventional high voltage secondary battery.
  • the fuse diagnosis apparatus of the high voltage secondary battery according to the embodiments of the present invention, the diagnostic diagnosis of the fuse of the conventional high voltage secondary battery, which must additionally design an insulation circuit to diagnose the state of the fuse mounted on the path through which the high voltage current flows. It may not increase the volume of BMS compared to the device.
  • FIG. 1 is an exemplary view showing a fuse diagnostic apparatus of a high voltage secondary battery according to a conventional example.
  • Figure 2 is an exemplary view showing a fuse diagnostic apparatus of a high voltage secondary battery according to another conventional example.
  • Figure 3 is an exemplary view showing a fuse diagnostic apparatus of a high voltage secondary battery according to an embodiment of the present invention.
  • FIG. 4 is a block diagram showing a measuring circuit according to an embodiment of the present invention.
  • FIG. 5 is a block diagram showing a measuring circuit according to another embodiment of the present invention.
  • the battery pack according to an embodiment of the present invention may store electrical energy and provide stored electrical energy.
  • a battery pack may include a plurality of battery cells that can be charged and discharged.
  • the battery pack may be formed of a battery module composed of a predetermined number of battery cells. That is, the battery pack may include at least one battery module, and thus may include a plurality of battery cells.
  • each battery module may be electrically connected to each other through various methods in a series and / or parallel manner so as to meet specifications of a battery or a load.
  • each battery cell may be electrically connected to each other through various methods in a series and / or parallel manner.
  • the type of battery cell is not particularly limited.
  • the type of battery cell may include a lithium ion battery, a lithium polymer battery, a nickel cadmium battery, a nickel hydrogen battery, a nickel zinc battery, and the like.
  • FIGS. 1 to 2 the design technology of the conventional fuse diagnosis apparatus for a high voltage secondary battery will be described with reference to FIGS. 1 to 2 to assist in understanding the fuse diagnosis apparatus for a high voltage secondary battery according to an exemplary embodiment of the present invention.
  • a fuse diagnosis apparatus for a high voltage secondary battery according to a conventional example.
  • FIG. 1 is a block diagram illustrating a fuse diagnosis apparatus of a high voltage secondary battery according to a conventional example.
  • the fuse diagnostic apparatus 100 for a high voltage secondary battery may include an insulation circuit 120 at a high voltage portion through which a high voltage of the high voltage battery pack 110 flows, and then, from the insulation circuit 120.
  • the voltage across the insulated fuse is measured by the measurement unit 130 located in the low voltage section where no high voltage flows, and the controller 140 receives the measured voltage across the fuse to diagnose whether the fuse is defective.
  • the fuse diagnostic apparatus 100 for a high voltage secondary battery may be based on an insulation element of the insulation circuit 120 according to the number of fuses to be measured, the number of switches, and the number of measurement target portions. And the specification of the measurement unit should be selected, there is a disadvantage that increases the design cost of the fuse diagnostic device of the high-voltage secondary battery because the price of the insulating device is relatively higher than other devices.
  • FIG. 2 is a block diagram illustrating a fuse diagnosis apparatus of a high voltage secondary battery according to another conventional example.
  • the fuse diagnostic apparatus 200 for a high voltage secondary battery includes a measuring unit 220 in a high voltage section through which a high voltage of the high voltage battery pack 210 flows, and in the measuring unit 220.
  • the controller 340 receives the measured voltage across the fuse through the insulation circuit 230 through which the high voltage does not flow to diagnose whether the fuse is defective.
  • the number of fuses to be measured, the number of switches, and the number of measurement target parts are measured as high voltage parts.
  • the design method of first arranging the parts may be preferable to the design method of the fuse diagnosis apparatus 100 of the high voltage secondary battery according to the conventional example described with reference to FIG. 1 in terms of technical and cost.
  • the power supply terminal for the measurement unit must be additionally insulated from the low voltage section.
  • FIG. 3 is an exemplary view illustrating a fuse diagnostic apparatus of a high voltage secondary battery according to an exemplary embodiment of the present invention.
  • the fuse diagnosis apparatus 300 for a high voltage secondary battery may include a high voltage battery pack 310, at least one fuse 320, a measurement circuit 330, a controller 340, and the like.
  • the memory device 350 may be included.
  • At least one fuse 320 is connected to a circuit path through which a high voltage charge / discharge current flows.
  • the measurement circuit 330 may include a comparator 332 or an analog-to-digital converter 333 that receives a voltage of each of both ends of the at least one fuse 320 as an input value.
  • the controller 340 may receive the output signal of the measuring circuit 330 to determine whether the state of the at least one fuse 320 is an open state.
  • the controller 340 is an output value of the comparator 332 or the analog-digital converter 333 when the output signal received from the measuring circuit 330 and the fuse 320 stored in the memory device 350 are in a normal state. It can be determined whether it matches the steady state output value.
  • the controller 340 may diagnose the state of the fuse 320 as a normal state.
  • the controller 340 may diagnose the state of the fuse 320 as an open state.
  • FIG. 4 is a configuration diagram illustrating a measurement circuit according to an exemplary embodiment of the present invention.
  • the measurement circuit 330 may include operational amplifiers 331: 331a and 331b, voltage divider resistors R1 and R2, input terminal resistors R3, and a comparator ( 332).
  • the fuse 320 is connected to a circuit path through which a high voltage charge / discharge current flows.
  • the voltages BV1 and BV2 of each of the fuses 320 are divided through the voltage divider resistors R1 and R2 and then combined with an offset voltage input through the operational amplifiers 331: 331a and 331b.
  • An input value of the input terminal of the comparator 330 may be input through the input terminal resistor R3 respectively connected to the input terminal of 332.
  • the comparator 330 may generate an output value and transmit the result of comparing two input values input to the input terminal to the controller 340.
  • the ground of the measurement circuit 330 may be connected to a low voltage ground.
  • the measurement circuit 330 measures the voltage of the fuse 320, BV1 and BV2, which are the voltages across the fuse 320 with respect to the low voltage ground voltage through the comparator 330 to determine the state of the fuse 320. Diagnosis can be made.
  • the voltages across the fuse 320, BV1 and BV2 may be in reverse voltage compared to the low voltage ground.
  • the voltages across the fuse 320, BV1 and BV2 are affected by the degree of insulation of the system in which the high voltage battery pack 310 is mounted, the state of the fuse 320, and the degree of load connected to the system. Therefore, the measurement circuit 330 according to an embodiment of the present invention is offset voltage through the operational amplifiers 331 (331: 331b, 331b) to prevent the voltage BV1 and BV2, which are the voltage across the fuse 320, from being reversed. May be input to the comparator 330.
  • the offset voltage input to the comparator 330 may be determined by the ratio of the voltage of the high voltage battery pack 310 and the resistance of the entire circuit of the measurement circuit 330.
  • the resistance ratio refers to the resistance ratio between the divided resistors R1 and R2 and the input terminal resistance R3, and the offset voltage input to the comparator 330 may be a resistance ratio, an offset voltage input to the comparator 330, and
  • the offset voltage may be determined based on an error between the voltage of the high voltage battery pack 310, the voltage of the high voltage battery pack 310, and the voltages of BV1 and BV2, which are voltages across the fuse 320.
  • the comparator 330 receives the summed voltage values of the voltages across the divided fuse 320, BV1, BV2, and the offset voltage through the two input terminals through the input terminal resistors R3, respectively.
  • One output value that is the result of comparing two input values with each other can be output.
  • the comparator 330 may transmit the output value to the controller 340.
  • the controller 340 may diagnose whether the fuse 310 is in a normal state or an open state from the output value received from the comparator 330.
  • control unit 340 receives the output value of the comparator 330, the comparator 330 when measuring the voltage at both ends of the fuse of the steady state in which the output value of the received comparator 330 is pre-stored in the memory device 350
  • the state of the fuse 320 may be determined by determining whether or not the same as the normal output value indicating the output value of.
  • the controller 340 may diagnose the state of the fuse 320 as an open state as an open state.
  • the measurement circuit 330 further includes a switch (not shown) connected between the low voltage ground and the circuit path through which BV1 and BV2, which are voltages across the fuse 320, flow to the comparator 330. It may include.
  • the operation of the comparator 330 may be selectively controlled according to the operating state of the switch. For example, when the switch operates in the on state, the comparator 330 may transmit an output value to the controller 340.
  • FIG. 5 is a configuration diagram illustrating a measurement circuit according to another exemplary embodiment of the present invention.
  • the measurement circuit 330 may include offset voltage input stage resistors R2, voltage dividers R1, R3, and R4, and an analog-digital converter 333. have.
  • the fuse 320 is connected to a circuit path through which a high voltage charge / discharge current flows.
  • the voltages BV1 and BV2 of the both ends of the fuse 320 are divided by the voltage divider resistors R1, R3, and R4, and then combined with the offset voltage input through the offset voltage input stage resistors R2. ) Can be input as input values to the input terminals.
  • the analog-digital converter 333 may generate an output value and transmit the result of comparing two input values input to the input terminal to the controller 340.
  • the ground of the measurement circuit 330 may be connected to a low voltage ground.
  • the measurement circuit 330 measures the voltage across the fuse 320, BV1 and BV2 by the analog-digital converter 333 to determine the fuse 320 of the fuse 320. Diagnose the condition.
  • the voltages across the fuse 320, BV1 and BV2 may be in reverse voltage compared to the low voltage ground.
  • the voltages across the fuse 320, BV1 and BV2 are affected by the degree of insulation of the system in which the high voltage battery pack 310 is mounted, the state of the fuse 320, and the degree of load connected to the system.
  • the measurement circuit 330 analogizes the offset voltage through the offset voltage input stage resistors R2 in order to prevent the voltages BV1 and BV2 across the fuse 320 from being reversed. It can be input to the digital converter 333.
  • the offset voltage input to the analog to digital converter 333 may be determined according to the input voltage range of the analog to digital converter 333.
  • the analog-to-digital converter 333 receives the summed voltage values obtained by adding the voltages BV1 and BV2, which are the voltages across the divided fuse 320, through the two input terminals, and digitally converts one from the two received analog values. Output the value of.
  • analog-digital converter 333 may transmit the output value to the controller 340.
  • the controller 340 may diagnose whether the fuse 320 is in a normal state or an open state from the output value received from the analog-digital converter 333.
  • control unit 340 receives the output value of the analog-to-digital converter 420, and when measuring the voltage at both ends of the fuse of the normal state in which the output value of the received analog-to-digital converter 420 is pre-stored in the memory device 350
  • the state of the fuse 320 may be determined by determining whether it is equal to the normal output value indicating the output value of the analog-digital converter 420.
  • the controller 340 may diagnose the state of the fuse 320 to be measured as an open state.
  • the measurement circuit 330 is a switch (not shown) connected between the low voltage ground and the circuit path flowing BV1 and BV2, the voltage across the fuse 320 to the analog-digital converter 333 It may further include.
  • the operation of the analog-to-digital converter 333 may be selectively controlled according to the operating state of the switch. For example, when the switch operates in the on state, the analog-digital converter 333 may transmit an output value to the controller 340.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Secondary Cells (AREA)

Abstract

La présente invention concerne un dispositif de diagnostic de fusible d'une batterie secondaire à haute tension, le dispositif comprenant : au moins un fusible connecté sur un trajet de circuit par lequel des courants de charge/décharge à haute tension circulent ; un comparateur relié aux deux extrémités du fusible en une ligne parallèle, et recevant des tensions aux deux extrémités du fusible de façon à délivrer en sortie une valeur de sortie ; et une unité de commande pour diagnostiquer si le fusible est défectueux sur la base de la valeur de sortie du comparateur.
PCT/KR2016/013549 2015-11-27 2016-11-23 Dispositif de diagnostic de fusible de batterie secondaire à haute tension Ceased WO2017090980A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2015-0167994 2015-11-27
KR1020150167994A KR102005397B1 (ko) 2015-11-27 2015-11-27 고전압 이차전지의 퓨즈 진단 장치

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Publication Number Publication Date
WO2017090980A1 true WO2017090980A1 (fr) 2017-06-01

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PCT/KR2016/013549 Ceased WO2017090980A1 (fr) 2015-11-27 2016-11-23 Dispositif de diagnostic de fusible de batterie secondaire à haute tension

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WO (1) WO2017090980A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220206081A1 (en) * 2019-04-30 2022-06-30 Siemens Aktiengesellschaft Reliable fault detection and fault localization in a load zone of a dc system

Families Citing this family (4)

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Publication number Priority date Publication date Assignee Title
KR102248533B1 (ko) 2017-09-29 2021-05-04 주식회사 엘지화학 컨텍터의 고장률 예측 시스템 및 방법
KR102733526B1 (ko) * 2018-06-07 2024-11-21 주식회사 엘지에너지솔루션 전압 측정 장치
CN110797934B (zh) * 2019-10-10 2022-06-10 华为数字能源技术有限公司 一种监测电池熔丝电路和电源系统
CN111579872B (zh) * 2020-05-22 2022-09-30 上汽通用汽车有限公司 汽车绝缘电阻实时监测系统和方法

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KR20110077387A (ko) * 2009-12-30 2011-07-07 현대모비스 주식회사 고전압 배터리시스템의 퓨즈 단선 감지회로 및 방법

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KR100450181B1 (ko) 2002-04-15 2004-09-24 삼성에스디아이 주식회사 공간적으로 분리된 2차 보호회로를 갖는 배터리 팩

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KR20060062368A (ko) * 2004-12-03 2006-06-12 삼성에스디아이 주식회사 하이브리드 이차 전지
KR20070009155A (ko) * 2005-07-15 2007-01-18 삼성전자주식회사 퓨즈 상태 모니터링 회로를 갖는 반도체 장치
KR20110001596A (ko) * 2009-06-30 2011-01-06 주식회사 하이닉스반도체 반도체 장치의 리페어 퓨즈 불량 검출방법
KR20110077387A (ko) * 2009-12-30 2011-07-07 현대모비스 주식회사 고전압 배터리시스템의 퓨즈 단선 감지회로 및 방법
KR20110013344A (ko) * 2010-12-27 2011-02-09 주식회사 엘지화학 퓨즈 불량의 자체 모니터링이 가능한 2차 전지 보호회로, 이를 이용한 배터리 팩 및 퓨즈 불량 모니터링 방법, 및 불량 퓨즈가 포함된 전지 조립체 분류 방법

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220206081A1 (en) * 2019-04-30 2022-06-30 Siemens Aktiengesellschaft Reliable fault detection and fault localization in a load zone of a dc system
US11874337B2 (en) * 2019-04-30 2024-01-16 Siemens Aktiengesellschaft Reliable fault detection and fault localization in a load zone of a DC system

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KR102005397B1 (ko) 2019-07-30
KR20170062325A (ko) 2017-06-07

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