WO2017090980A1 - Fuse diagnosis device of high-voltage secondary battery - Google Patents

Fuse diagnosis device of high-voltage secondary battery 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
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Prior art keywords
fuse
voltage
output value
high voltage
comparator
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PCT/KR2016/013549
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French (fr)
Korean (ko)
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박재동
성창현
이상훈
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주식회사 엘지화학
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Publication of WO2017090980A1 publication Critical patent/WO2017090980A1/en

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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
    • 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

The present invention presents a fuse diagnosis device of a high-voltage secondary battery, the device comprising: at least one fuse connected on a circuit path through which charging/discharging currents of a high voltage flow; a comparator connected to both ends of the fuse in a parallel line, and receiving voltages at both ends of the fuse so as to output an output value; and a control unit for diagnosing whether the fuse is defective on the basis of the output value of the comparator .

Description

고전압 이차전지의 퓨즈 진단 장치Fuse Diagnosis Device of High Voltage Secondary Battery
본 발명은 고전압 이차전지의 퓨즈 진단 장치에 관한 것으로, 특히 고전압 충방전 전류가 흐르는 회로 상에 접속된 퓨즈의 상태를 비교기 또는 아날로그디지털변환기의 출력 신호를 통해 진단할 수 있는 고전압 이차전지의 퓨즈 진단 장치에 관한 것이다.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.
최근 이차 전지에 대한 연구 개발이 활발히 이루어지고 있다. 여기서 이차 전지는 충방전이 가능한 전지로서, 종래의 Ni/Cd 전지, Ni/MH 전지 등과 최근의 리듐 이온 전지를 모두 포함하는 의미이다. 이차 전지 중 리튬 이온 전지는 종래의 Ni/Cd 전지, Ni/MH 전지 등에 비하여 에너지 밀도가 훨씬 높다는 장점이 있다, 또한, 리튬 이온 전지는 소형, 경향으로 제작할 수 있어서, 이동 기기의 전원으로 사용된다. 또한, 리듐 이온 전지는 전기 자동차의 전원으로 사용 범위가 확장되어 차세대 에너지 저장 매체로 주목을 받고 있다.Recently, research and development on secondary batteries have been actively conducted. Here, 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. Among 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. In addition, lithium ion batteries can be manufactured in a small size and tend to be used as a power source for mobile devices. . In addition, 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.
한편, 종래의 고전압 배터리 시스템에 실장된 퓨즈의 상태를 측정하는 기술에서 고전압 전류가 흐르는 경로 상에 실장된 퓨즈의 상태를 진단하기 위해선 고전압에 대한 절연이 요구되었다. 고전압의 절연하며 퓨즈 양단의 전압을 측정을 수행할 수 있는 회로 설계가 추가로 필요하므로 종래의 고전압 배터리 시스템에 실장된 퓨즈의 상태를 측정하는 기술은 저전압 배터리 시스템의 퓨즈 진단 기술에 비해 상대적으로 높은 회로 설계 비용이 소모되었다.Meanwhile, in a technology of measuring a state of a fuse mounted in a conventional high voltage battery system, insulation against high voltage is required to diagnose a state of a fuse mounted on a path through which a high voltage current flows. Because of the need for an additional circuit design that can measure the voltage across the fuse with high voltage isolation, the technology for measuring the state of fuses mounted in conventional high voltage battery systems is relatively high compared to the fuse diagnostic technology of low voltage battery systems. Circuit design costs have been consumed.
또한, 종래의 고전압 배터리 시스템은 절연회로를 추가로 설계해야 하기 때문에 설계 비용이 증가하는 문제점이 있다.In addition, 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.
또한, 추가적인 절연회로로 인해 BMS의 부피가 증가하여 최종 양산된 제품의 크기가 증가하는 문제점이 있다.In addition, there is a problem that the size of the final mass-produced product is increased by increasing the volume of the BMS due to the additional insulation circuit.
따라서, 저비용의 회로 설계를 통해 고전압 배터리 시스템에 실장된 퓨즈의 상태를 진단할 수 있는 기술의 개발이 요구된다.Therefore, there is a need for development of a technology capable of diagnosing a state of a fuse mounted in a high voltage battery system through a low cost circuit design.
본 발명은 고전압 배터리 시스템에서 고전압 배터리 팩의 절연에 영항을 주지 않는 범위 내에서 고전압 전류가 흐르는 경로 상에 실장된 퓨즈의 상태를 진단할 수 있는 새로운 형태의 고전압 이차전지의 퓨즈 진단 장치를 제공한다.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. .
본 발명의 일 실시 예에 따른 고전압 이차전지의 퓨즈 진단 장치는, 고전압의 충/방전 전류가 흐르는 회로 경로 상에 접속된 적어도 하나의 퓨즈; 상기 퓨즈 양단과 병렬 라인으로 연결되어 상기 퓨즈의 양단 전압을 입력 받아 출력 값을 출력하는 비교기; 및 상기 비교기의 출력 값으로부터 상기 퓨즈의 불량 여부를 진단하는 제어부; 를 포함할 수 있다.An apparatus for diagnosing a fuse of a high voltage secondary battery according to an embodiment of the present invention 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.
상기 고전압 이차전지의 퓨즈 진단 장치의 그라운드는 저전압 그라운드 와 연결될 수 있다.The ground of the fuse diagnosis device of the high voltage secondary battery may be connected to a low voltage ground.
상기 퓨즈가 정상 상태일 경우의 상기 비교기의 출력 값인 정상 상태 출력 값이 미리 수록된 기억 소자; 를 더 포함하며, 상기 제어부는 상기 비교기의 출력 값과 미리 수록된 상기 정상 상태 출력 값이 서로 동일한 값을 갖는지 판단하고, 상기 판단 결과, 상기 비교기의 출력 값이 미리 수록된 상기 정상 상태 출력 값과 서로 다른 경우, 상기 퓨즈의 상태를 불량으로 진단할 수 있다.A memory device in which a steady state output value, which is an output value of the comparator 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 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.
본 발명의 다른 실시 예에 따른 고전압 이차전지의 퓨즈 진단 장치는, 고전압의 충/방전 전류가 흐르는 회로 경로 상에 접속된 적어도 하나의 퓨즈, 상기 퓨즈 양단과 병렬 라인으로 연결되어 상기 퓨즈의 양단 전압을 입력 받아 출력 값을 출력하는 아날로그디지털변환기; 및 상기 아날로그디지털변환기의 출력 값으로부터 상기 퓨즈의 불량 여부를 진단하는 제어부를 포함할 수 있다.The fuse diagnostic apparatus for a high voltage secondary battery according to another exemplary embodiment of the present invention 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; And a controller for diagnosing whether the fuse is defective from the output value of the analog-digital converter.
상기 고전압 이차전지의 퓨즈 진단 장치의 그라운드는 저전압 그라운드 와 연결될 수 있다.The ground of the fuse diagnosis device of the high voltage secondary battery may be connected to a low voltage ground.
상기 퓨즈가 정상 상태일 경우의 상기 아날로그디지털변환기의 출력 값인 정상 상태 출력 값이 미리 수록된 기억 소자; 를 더 포함하며, 상기 제어부는 상기 아날로그디지털변환기의 출력 값과 미리 수록된 상기 정상 상태 출력 값이 서로 동일한 값을 갖는지 판단하고, 상기 판단 결과, 상기 아날로그디지털변환기의 출력 값이 미리 수록된 상기 정상 상태 출력 값과 서로 다른 경우, 상기 퓨즈의 상태를 불량으로 진단할 수 있다.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.
본 발명의 실시 예들에 따른 고전압 이차전지의 퓨즈 진단 장치는, 고전압 전류가 흐르는 경로 상에 실장된 퓨즈의 상태를 진단함에 있어서, 절연회로를 추가하지 않고, 퓨즈의 양단에 각각 직렬 연결된 분압저항들과 병렬 연결된 비교기 또는 아날로그디지털변환기를 통해 퓨즈의 상태를 진단할 수 있으므로, 종래의 고전압 이차전지의 퓨즈 진단 장치에 비해 생산 비용을 증가시키지 않고 퓨즈의 상태를 진단할 수 있다.In the fuse diagnosis apparatus of a high voltage secondary battery according to embodiments of the present invention, 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.
또한, 본 발명의 실시 예들에 따른 고전압 이차전지의 퓨즈 진단 장치는, 고전압 전류가 흐르는 경로상에 실장된 퓨즈의 상태를 진단하기 위해 추가로 절연회로를 설계해야 하는 종래의 고전압 이차전지의 퓨즈 진단 장치에 비해 BMS의 부피를 증가시키지 않을 수 있다.In addition, 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.
도 1은 종래의 일 예에 따른 고전압 이차전지의 퓨즈 진단 장치를 나타내는 예시도.1 is an exemplary view showing a fuse diagnostic apparatus of a high voltage secondary battery according to a conventional example.
도 2는 종래의 다른 예에 따른 고전압 이차전지의 퓨즈 진단 장치를 나타내는 예시도.Figure 2 is an exemplary view showing a fuse diagnostic apparatus of a high voltage secondary battery according to another conventional example.
도 3은 본 발명의 실시 예에 따른 고전압 이차전지의 퓨즈 진단 장치를 나타내는 예시도.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.
도 4는 본 발명의 일 실시 예에 따른 측정회로를 나타내는 구성도.4 is a block diagram showing a measuring circuit according to an embodiment of the present invention.
도 5는 본 발명의 다른 실시 예에 따른 측정회로를 나타내는 구성도.5 is a block diagram showing a measuring circuit according to another embodiment of the present invention.
이하, 첨부된 도면을 참조하여 본 발명의 실시 예를 상세히 설명하기로 한 다. 그러나, 본 발명은 이하에서 개시되는 실시 예에 한정되는 것이 아니라 서로 다른 다양한 형태로 구현될 것이며, 단지 본 실시 예들은 본 발명의 개시가 완전하도록 하며, 통상의 지식을 가진 자에게 발명의 범주를 완전하게 알려주기 위해 제공되는 것이다.Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various forms, and only the embodiments are intended to complete the disclosure of the present invention and to those skilled in the art. It is provided for complete information.
본 발명의 실시 예에 따른 배터리 팩은 전기 에너지를 저장하고, 저장된 전기 에너지를 제공할 수 있다. 이러한 배터리 팩은 충전 및 방전 가능한 복수 개의 배터리 셀들을 포함할 수 있다.The battery pack according to an embodiment of the present invention may store electrical energy and provide stored electrical energy. Such a battery pack may include a plurality of battery cells that can be charged and discharged.
또한, 배터리 팩은 소정의 개수의 배터리 셀들로 구성된 배터리 모듈로 이루어질 수 있다. 즉, 배터리 팩은 적어도 하나의 배터리 모듈을 포함할 수 있으므로, 복수 개의 배터리 셀들을 포함할 수 있다.In addition, 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.
또한, 복수 개의 배터리 모듈들이 배터리 팩을 구성하는 경우, 각각의 배터리 모듈은 배터리나 부하 등의 스펙(specification)에 부합되도록 직렬 및/또는 병렬 방식의 다양한 방법을 통해 서로 전기적으로 연결될 수 있다.In addition, when a plurality of battery modules constitute a battery pack, 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.
또한, 복수 개의 배터리 셀들이 배터리 모듈을 구성하는 경우, 각각의 배터리 셀은 직렬 및/또는 병렬 방식의 다양한 방법을 통해 서로 전기적으로 연결될 수 있다. 여기서, 배터리 셀의 종류가 특별히 한정되지 않는다. 예를 들어, 배터리 셀의 종류로는 리튬 이온 전지, 리튬 폴리머 전지, 니켈 카드뮴 전지, 니켈 수소 전지, 니켈 아연 전지 등을 포함할 수 있다.In addition, when a plurality of battery cells constitute a battery module, each battery cell may be electrically connected to each other through various methods in a series and / or parallel manner. Here, the type of battery cell is not particularly limited. For example, 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.
먼저, 본 발명의 실시 예에 따른 고전압 이차전지의 퓨즈 진단 장치의 이해를 돕기 위해 도 1 내지 도 2를 참조하여 종래의 고전압 이차전지의 퓨즈 진단 장치의 설계 기술에 대하여 설명한다.First, 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.
1. 종래의 일 예에 따른 고전압 이차전지의 퓨즈 진단 장치.1. A fuse diagnosis apparatus for a high voltage secondary battery according to a conventional example.
도 1은 종래의 일 예에 따른 고전압 이차전지의 퓨즈 진단 장치를 나타내는 구성도이다.1 is a block diagram illustrating a fuse diagnosis apparatus of a high voltage secondary battery according to a conventional example.
도 1을 참조하면, 종래의 일 예에 따른 고전압 이차전지의 퓨즈 진단 장치(100)는 고전압 배터리 팩(110)의 고전압이 흐르는 고전압부에 절연회로(120)를 두고, 절연회로(120)로부터 절연된 퓨즈 양단 전압을 고전압이 흐르지 않는 저전압부에 위치한 측정부(130)에서 측정하고, 측정된 퓨즈 양단 전압을 제어부(140)가 수신하여 퓨즈의 불량 여부를 진단한다.Referring to FIG. 1, the fuse diagnostic apparatus 100 for a high voltage secondary battery according to a conventional example 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.
상기 도 1을 참조하여 설명된 종래의 일 예에 따른 고전압 이차전지의 퓨즈 진단 장치(100)는 측정 대상인 퓨즈의 개수, 스위치의 개수 및 측정 대상부분의 개수에 따라 절연회로(120)의 절연소자 및 측정부의 사양이 선정이 되어야 하며, 다른 소자에 비해 상대적으로 절연소자의 가격이 높아 고전압 이차전지의 퓨즈 진단 장치의 설계 비용을 상승시킨다는 단점이 있다.The fuse diagnostic apparatus 100 for a high voltage secondary battery according to the related art described with reference to FIG. 1 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.
2. 종래의 다른 예에 따른 고전압 이차전지의 퓨즈 진단 장치.2. Fuse diagnostic apparatus for a high voltage secondary battery according to another conventional example.
도 2는 종래의 다른 예에 따른 고전압 이차전지의 퓨즈 진단 장치를 나타내는 구성도이다.2 is a block diagram illustrating a fuse diagnosis apparatus of a high voltage secondary battery according to another conventional example.
도 2를 참조하면, 종래의 다른 예에 따른 고전압 이차전지의 퓨즈 진단 장치(200)는 고전압 배터리 팩(210)의 고전압이 흐르는 고전압부에 측정부(220)를 두고, 측정부(220)에서 측정된 퓨즈 양단 전압을 고전압이 흐르지 않는 절연회로 (230)를 거쳐 제어부(340)가 수신하여 퓨즈의 불량 여부를 진단한다.Referring to FIG. 2, the fuse diagnostic apparatus 200 for a high voltage secondary battery according to another conventional example 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.
상기 도 2를 참조하여 설명된 종래의 다른 예에 따른 고전압 이차전지의 퓨즈 진단 장치(200)의 설계 방식처럼 측정 대상인 퓨즈의 개수, 스위치의 개수 및 측정 대상 부분의 개수가 증가할수록 고전압부에 측정부를 우선 배치하는 설계 방식이 기술적 및 가격적인 측면에서 상기 도 1을 참조하여 설명된 종래의 일 예에 따른 고전압 이차전지의 퓨즈 진단 장치(100)의 설계 방식보다 선호될 수 있다. 하지만 측정부를 고전압부에 설계하기 위해서는 측정부를 위한 전원단을 저전압부로부터 절연하여 추가 설계해야 하는 단점이 있다.As the design method of the fuse diagnostic apparatus 200 of the high voltage secondary battery according to another conventional example described with reference to FIG. 2, 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. However, in order to design the measurement unit in the high voltage section, there is a disadvantage in that the power supply terminal for the measurement unit must be additionally insulated from the low voltage section.
3. 본 발명의 실시 예에 따른 고전압 이차전지의 퓨즈 진단 장치.3. Fuse diagnostic apparatus for a high voltage secondary battery according to an embodiment of the present invention.
도 3은 본 발명의 실시 예에 따른 고전압 이차전지의 퓨즈 진단 장치를 나타내는 예시도이다.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.
도 3을 참조하면, 본 발명의 실시 예에 따른 고전압 이차전지의 퓨즈 진단 장치(300)는 고전압 배터리 팩(310), 적어도 하나의 퓨즈(320), 측정회로(330), 제어부(340) 및 기억소자(350)를 포함할 수 있다.Referring to FIG. 3, the fuse diagnosis apparatus 300 for a high voltage secondary battery according to an embodiment of the present invention 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.
적어도 하나의 퓨즈(320)는 고전압 충/방전 전류가 흐르는 회로 경로 상에 접속된 상태이다.At least one fuse 320 is connected to a circuit path through which a high voltage charge / discharge current flows.
측정회로(330)는 적어도 하나의 퓨즈(320)의 양단 각각의 전압을 입력 값으로 입력 받는 비교기(332) 또는 아날로그디지털변환기(333)를 포함할 수 있다.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.
제어부(340)는 측정회로(330)의 출력 신호를 전달받아 적어도 하나의 퓨즈(320)의 상태가 오픈 상태인지 아닌지 판단할 수 있다. 예컨대, 제어부(340)는 측정회로(330)로부터 전달 받은 출력 신호와 기억 소자(350)에 미리 저장된 퓨즈 (320)가 정상 상태일 경우의 비교기(332) 또는 아날로그디지털변환기(333)의 출력 값인 정상 상태 출력 값과 일치 여부를 판단할 수 있다.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. For example, 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.
상기 판단 결과, 측정회로(330)로부터 전달 받은 출력 신호와 미리 저장된 정상 상태 출력 값이 서로 일치하는 경우, 제어부(340)는 퓨즈(320)의 상태를 정상 상태로 진단할 수 있다.As a result of the determination, when the output signal received from the measuring circuit 330 and the pre-stored steady state output value coincide with each other, the controller 340 may diagnose the state of the fuse 320 as a normal state.
측정회로(330)로부터 전달 받은 출력 신호와 미리 저장된 정상 상태 출력 값이 서로 일치하지 않는 경우, 제어부(340)는 퓨즈(320)의 상태를 오픈 상태로 진단할 수 있다.When the output signal received from the measuring circuit 330 and the previously stored steady state output value do not coincide with each other, the controller 340 may diagnose the state of the fuse 320 as an open state.
4. 본 발명의 일 실시 예에 따른 측정회로4. Measuring circuit according to an embodiment of the present invention
도 4는 본 발명의 일 실시 예에 따른 측정회로를 나타내는 구성도이다.4 is a configuration diagram illustrating a measurement circuit according to an exemplary embodiment of the present invention.
도 4를 참조하면, 본 발명의 일 실시 예에 따른 측정회로(330)는 연산증폭기들(331: 331a, 331b), 분압저항들(R1, R2), 입력단자 저항들(R3) 및 비교기(332)를 포함할 수 있다.Referring to FIG. 4, the measurement circuit 330 according to an embodiment of the present invention may include operational amplifiers 331: 331a and 331b, voltage divider resistors R1 and R2, input terminal resistors R3, and a comparator ( 332).
퓨즈(320)는 고전압 충/방전 전류가 흐르는 회로 경로 상에 접속된 상태 이다. 퓨즈(320) 양단 각각의 전압 BV1과 BV2는 분압저항들(R1, R2)을 통해 분압된 후, 연산증폭기들(331: 331a, 331b)을 통해 입력되는 오프셋(Offset) 전압과 합쳐진 상태에서 비교기(332)의 입력단자에 각각 접속된 입력단자 저항(R3)을 거쳐비교기(330)의 입력단자의 입력 값으로 각각 입력될 수 있다.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.
비교기(330)는 입력단자로 입력된 두 개의 입력 값을 서로 비교한 결과를 출력 값을 생성하여 제어부(340)로 전달할 수 있다.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.
또한, 본 발명의 일 실시 예에 따른 측정회로(330)의 그라운드는 저전압 그라운드와 연결될 수 있다.In addition, the ground of the measurement circuit 330 according to an embodiment of the present invention may be connected to a low voltage ground.
더욱 상세하게는, 본 발명의 일 실시 예에 따른 측정회로(330)는 비교기 (330)를 통해 저전압 그라운드 전압 대비 퓨즈(320) 양단의 전압인 BV1과 BV2를 측정하여 퓨즈(320)의 상태를 진단할 수 있다.In more detail, the measurement circuit 330 according to an embodiment of the present invention 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.
퓨즈(320) 양단의 전압인 BV1과 BV2는 저전압 그라운드 대비 역전압 상태가 될 수 있다. 예컨대, 퓨즈(320) 양단의 전압인 BV1과 BV2는 고전압 배터리 팩(310)이 실장된 시스템의 절연 정도, 퓨즈(320)의 상태, 시스템과 연결된 부하의 정도에 따라 영향을 받기 때문이다. 따라서 본 발명의 일 실시 예에 따른 측정회로(330)는 퓨즈(320) 양단의 전압인 BV1과 BV2가 역전압 상태가 되는 것을 방지하기 위해 연산증폭기들(331: 331a, 331b)를 통해 오프셋 전압을 비교기(330)에 입력할 수 있다.The voltages across the fuse 320, BV1 and BV2, may be in reverse voltage compared to the low voltage ground. For example, 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.
비교기(330)로 입력되는 오프셋 전압은 고전압 배터리 팩(310)의 전압과 측정회로(330)의 전체 회로의 저항비에 의해 결정될 수 있다. 예컨대, 저항비는 분압저항들(R1, R2)과 입력단자 저항(R3) 간의 저항비를 의미하며, 비교기(330)로 입력되는 오프셋 전압은 저항비, 비교기(330)로 입력되는 오프셋 전압 및 고전압 배터리 팩(310)의 전압, 고전압 배터리 팩(310)의 전압과 퓨즈(320) 양단의 전압인 BV1과 BV2의 전압의 오차를 바탕으로 오프셋 전압은 결정될 수 있다.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. For example, 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.
비교기(330)는 분압된 퓨즈(320) 양단의 전압인 BV1과 BV2과 오프셋 전압이 합산된 합산 전압 값들을 입력단자 저항들(R3)을 각각 거쳐 두 개의 입력단자를 통해 입력 받고, 입력 받은 두 개의 입력 값들이 서로 비교된 결과인 하나의 출력 값을 출력할 수 있다.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.
또한, 비교기(330)는 출력 값을 제어부(340)로 전달할 수 있다.In addition, the comparator 330 may transmit the output value to the controller 340.
제어부(340)는 비교기(330)로부터 전달 받은 출력 값으로부터 퓨즈(310)의 상태가 정상 상태인지 오픈 상태인지를 진단할 수 있다.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.
또한, 제어부(340)는 비교기(330)의 출력 값을 전달받고, 전달받은 비교기 (330)의 출력 값이 기억소자(350)에 미리 저장된 정상 상태의 퓨즈의 양단 전압을 측정 시 비교기(330)의 출력 값을 나타내는 정상 출력 값과 동일 여부를 판단하여 퓨즈(320)의 상태를 판단할 수 있다.In addition, the 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.
상기 판단 결과, 비교기(330)의 출력 값이 미리 저장된 정상 출력 값과 동일하지 않은 경우, 제어부(340)는 측정 대상인 퓨즈(320)의 상태를 오픈(Open) 상태로 진단할 수 있다.As a result of the determination, when the output value of the comparator 330 is not the same as the previously stored normal output value, the controller 340 may diagnose the state of the fuse 320 as an open state as an open state.
한편, 본 발명의 일 실시 예에 따른 측정회로(330)는 퓨즈(320) 양단의 전압인 BV1과 BV2가 비교기(330)로 흐르는 회로 경로와 저전압 그라운드 사이에 접속된 스위치(미도시)를 더 포함할 수 있다. 비교기(330)의 동작은 스위치의 동작 상태에 따라 선택적으로 제어될 수 있다. 예를 들어, 스위치가 온 상태로 동작하는 경우, 비교기(330)는 출력 값을 제어부(340)로 전달할 수 있다.Meanwhile, the measurement circuit 330 according to an embodiment of the present invention 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.
5. 본 발명의 다른 실시 예에 따른 측정회로5. Measuring circuit according to another embodiment of the present invention
도 5는 본 발명의 다른 실시 예에 따른 측정회로를 나타내는 구성도이다.5 is a configuration diagram illustrating a measurement circuit according to another exemplary embodiment of the present invention.
도 5를 참조하면, 본 발명의 다른 실시 예에 따른 측정회로(330)는 오프셋 전압 입력단 저항들(R2), 분압저항들(R1, R3, R4) 및 아날로그디지털변환기(333)를 포함할 수 있다.Referring to FIG. 5, the measurement circuit 330 according to another exemplary embodiment may include offset voltage input stage resistors R2, voltage dividers R1, R3, and R4, and an analog-digital converter 333. have.
퓨즈(320)는 고전압 충/방전 전류가 흐르는 회로 경로 상에 접속된 상태 이다. 퓨즈(320) 양단 각각의 전압 BV1, BV2는 분압저항들(R1, R3, R4)을 통해 분압된 후 오프셋 전압 입력단 저항들(R2)을 통해 입력되는 오프셋 전압과 합쳐진상태에서 아날로그디지털변환기(333)의 입력단자에 입력 값으로 각각 입력될 수 있다.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.
아날로그디지털변환기(333)는 입력단자로 입력된 두 개의 입력 값을 서로 비교한 결과를 출력 값을 생성하여 제어부(340)로 전달할 수 있다.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.
또한, 본 발명의 다른 실시 예에 따른 측정회로(330)의 그라운드는 저전압 그라운드와 연결될 수 있다.In addition, the ground of the measurement circuit 330 according to another embodiment of the present invention may be connected to a low voltage ground.
더욱 상세하게는, 본 발명의 다른 실시 예에 따른 측정회로(330)는 아날로그디지털변환기(333)를 통해 저전압 그라운드 전압 대비 퓨즈(320) 양단의 전압인 BV1과 BV2를 측정하여 퓨즈(320)의 상태를 진단할 수 있다.More specifically, the measurement circuit 330 according to another embodiment of the present invention 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.
퓨즈(320) 양단의 전압인 BV1과 BV2는 저전압 그라운드 대비 역전압 상태가 될 수 있다. 예컨대, 퓨즈(320) 양단의 전압인 BV1과 BV2는 고전압 배터리 팩(310)이 실장된 시스템의 절연 정도, 퓨즈(320)의 상태, 시스템과 연결된 부하의 정도에 따라 영향을 받기 때문이다. 따라서 본 발명의 일 실시 예에 따른 측정회로(330)는 퓨즈(320) 양단의 전압인 BV1과 BV2가 역전압 상태가 되는 것을 방지하기 위해 오프셋 전압 입력단 저항들(R2)을 통해 오프셋 전압을 아날로그디지털변환기(333)에 입력할 수 있다.The voltages across the fuse 320, BV1 and BV2, may be in reverse voltage compared to the low voltage ground. For example, 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. Accordingly, the measurement circuit 330 according to an embodiment of the present invention 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.
아날로그디지털변환기(333)로 입력되는 오프셋 전압은 아날로그디지털변환기 (333)의 입력 전압 범위(Input Voltage Range)에 따라 결정될 수 있다.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.
아날로그디지털변환기(333)는 분압된 퓨즈(320) 양단의 전압인 BV1과 BV2과 오프셋 전압이 합산된 합산 전압 값들을 두 개의 입력단자를 통해 입력받고, 입력 받은 두 개의 아날로그 값들로부터 디지털 변환된 하나의 출력 값을 출력할 수 있다.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.
또한, 아날로그디지털변환기(333)는 출력 값을 제어부(340)로 전달할 수 있다.In addition, the analog-digital converter 333 may transmit the output value to the controller 340.
제어부(340)는 아날로그디지털변환기(333)로부터 전달 받은 출력 값으로부터 퓨즈(320)의 상태가 정상 상태인지 오픈 상태인지를 진단할 수 있다.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.
또한, 제어부(340)는 아날로그디지털변환기(420)의 출력 값을 전달받고, 전달받은 아날로그디지털변환기(420)의 출력 값이 기억소자(350)에 미리 저장된 정상 상태의 퓨즈의 양단 전압을 측정 시 아날로그디지털변환기(420)의 출력 값을 나타내는 정상 출력 값과 동일 여부를 판단하여 퓨즈(320)의 상태를 판단할 수 있다.In addition, the 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.
상기 판단 결과, 아날로그디지털변환기(420)의 출력 값이 미리 저장된 정상 출력 값과 동일하지 않은 경우, 제어부(340)는 측정 대상인 퓨즈(320)의 상태를 오픈 상태로 진단할 수 있다.As a result of the determination, when the output value of the analog-to-digital converter 420 is not the same as the pre-stored normal output value, the controller 340 may diagnose the state of the fuse 320 to be measured as an open state.
한편, 본 발명의 다른 실시 예에 따른 측정회로(330)는 퓨즈(320) 양단의 전압인 BV1과 BV2가 아날로그디지털변환기(333)로 흐르는 회로 경로와 저전압 그라운드 사이에 접속된 스위치(미도시)를 더 포함할 수 있다. 아날로그디지털변환기(333)의 동작은 스위치의 동작 상태에 따라 선택적으로 제어될 수 있다. 예를 들어, 스위치가 온 상태로 동작하는 경우, 아날로그디지털변환기 (333)는 출력 값을 제어부(340)로 전달할 수 있다.On the other hand, the measurement circuit 330 according to another embodiment of the present invention 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.
한편, 본 발명의 기술적 사상은 상기 실시 예에 따라 구체적으로 기술되었으나, 상기 실시 예는 그 설명을 위한 것이며, 그 제한을 위한 것이 아님을 주지해야 한다. 또한, 본 발명의 기술분야에서 당업자는 본 발명의 기술 사상의 범위 내에서 다양한 실시 예가 가능함을 이해할 수 있을 것이다.On the other hand, although the technical spirit of the present invention has been described in detail according to the above embodiment, it should be noted that the above embodiment is for the purpose of explanation and not for the limitation. In addition, those skilled in the art will understand that various embodiments are possible within the scope of the technical idea of the present invention.

Claims (10)

  1. 고전압의 충/방전 전류가 흐르는 회로 경로 상에 접속된 적어도 하나의 퓨즈;At least one fuse connected on a circuit path through which a high voltage charge / discharge current flows;
    상기 퓨즈 양단과 병렬 라인으로 연결되어 상기 퓨즈의 양단 전압을 입력 받아 출력 값을 출력하는 비교기; 및A 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
    상기 비교기의 출력 값으로부터 상기 퓨즈의 불량 여부를 진단하는 제어부;A controller for diagnosing whether the fuse is defective from the output value of the comparator;
    를 포함하는 것을 특징으로 하는 고전압 이차전지의 퓨즈 진단 장치.Fuse diagnostic apparatus for a high voltage secondary battery comprising a.
  2. 청구항 1에 있어서The method according to claim 1
    상기 고전압 이차전지의 퓨즈 진단 장치의 그라운드는 저전압 그라운드와 연결되는 것을 특징으로 하는 고전압 이차전지의 퓨즈 진단 장치.The ground of the fuse diagnosis device of the high voltage secondary battery fuse diagnostic device, characterized in that connected to a low voltage ground.
  3. 청구항 2에 있어서,The method according to claim 2,
    상기 비교기에 오프셋(offset) 전압을 공급하는 연산증폭기들; 을 더 포함하며,Operational amplifiers for supplying an offset voltage to the comparator; More,
    상기 비교기는 입력 신호로서 상기 퓨즈의 양단 전압과 상기 오프셋 전압의 합져진 전압 값을 입력 받아, 상기 퓨즈의 양단의 전압이 상기 저전압 그라운드 대비 역전압이 되는 것을 방지하는 것을 특징으로 하는 고전압 이차전지의 퓨즈 진단장치.The comparator receives a combined voltage value of the both ends of the fuse and the offset voltage as an input signal, thereby preventing the voltage of both ends of the fuse from becoming a reverse voltage compared to the low voltage ground. Fuse diagnostics.
  4. 청구항 2에 있어서,The method according to claim 2,
    상기 퓨즈의 양단의 전압이 상기 비교기로 흐르는 회로 경로와 상기 저전압그라운드 사이에 접속된 스위치; 를 더 포함하며,A switch connected between a circuit path through which the voltage across the fuse flows to the comparator and the low voltage ground; More,
    상기 비교기의 동작은 상기 스위치에 동작 상태에 따라 선택적으로 제어되는것을 특징으로 하는 고전압 이차전지의 퓨즈 진단 장치.The operation of the comparator is a fuse diagnostic device for a high voltage secondary battery, characterized in that the switch is selectively controlled according to the operating state.
  5. 청구항 1에 있어서,The method according to claim 1,
    상기 퓨즈가 정상 상태일 경우의 상기 비교기의 출력 값인 정상 상태 출력 값이 미리 수록된 기억 소자; 를 더 포함하며,A memory device in which a steady state output value, which is an output value of the comparator when the fuse is in a normal state, is stored in advance; More,
    상기 제어부는 상기 비교기의 출력 값과 미리 수록된 상기 정상 상태 출력 값이 서로 동일한 값을 갖는지 판단하고, 상기 판단 결과, 상기 비교기의 출력 값이 미리 수록된 상기 정상 상태 출력 값과 서로 다른 경우, 상기 퓨즈의 상태를 불량으로 진단하는 것을 특징으로 하는 고전압 이차전지의 퓨즈 진단 장치.The controller determines whether the output value of the comparator and the previously recorded steady state output value have the same value, and when the output value of the comparator is different from the previously recorded steady state output value, the fuse of the fuse A fuse diagnostic apparatus for a high voltage secondary battery, characterized by diagnosing a state as defective.
  6. 고전압의 충/방전 전류가 흐르는 회로 경로 상에 접속된 적어도 하나의 퓨즈;At least one fuse connected on a circuit path through which a high voltage charge / discharge current flows;
    상기 퓨즈 양단과 병렬 라인으로 연결되어 상기 퓨즈의 양단 전압을 입력 받아 출력 값을 출력하는 아날로그디지털변환기; 및An analog-digital converter connected to both ends of the fuse and connected in parallel to receive a voltage at both ends of the fuse and output an output value; And
    상기 아날로그디지털변환기의 출력 값으로부터 상기 퓨즈의 불량 여부를 진단하는 제어부;A control unit for diagnosing whether the fuse is defective from the output value of the analog-digital converter;
    를 포함하는 것을 특징으로 하는 고전압 이차전지의 퓨즈 진단 장치.Fuse diagnostic apparatus for a high voltage secondary battery comprising a.
  7. 청구항 6에 있어서,The method according to claim 6,
    상기 고전압 이차전지의 퓨즈 진단 장치의 그라운드는 저전압 그라운드와 연결되는 것을 특징으로 하는 고전압 이차전지의 퓨즈 진단 장치.The ground of the fuse diagnosis device of the high voltage secondary battery fuse diagnostic device, characterized in that connected to a low voltage ground.
  8. 청구항 7에 있어서,The method according to claim 7,
    상기 아날로그디지털변환기에 오프셋(offset) 전압을 공급하는 적어도 하나의 오프셋 전압 입력단 저항; 을 더 포함하며,At least one offset voltage input stage resistor for supplying an offset voltage to the analog-to-digital converter; More,
    상기 아날로그디지털변환기는 입력 신호로서 상기 퓨즈의 양단 전압과 상기 오프셋 전압의 합져진 전압 값을 입력 받아, 상기 퓨즈의 양단의 전압이 상기 저전압 그라운드 대비 역전압이 되는 것을 방지하는 것을 특징으로 하는 고전압 이차전지의 퓨즈 진단 장치.The analog-to-digital converter receives a combined voltage value of the both ends of the fuse and the offset voltage as an input signal, thereby preventing the voltage of both ends of the fuse from becoming a reverse voltage compared to the low voltage ground. Fuse diagnostics of the battery.
  9. 청구항 7에 있어서,The method according to claim 7,
    상기 퓨즈의 양단의 전압이 상기 아날로그디지털변환기로 흐르는 회로 경로와 상기 저전압 그라운드 사이에 접속된 스위치; 를 더 포함하며,A switch connected between a circuit path through which the voltage across the fuse flows to the analog-to-digital converter and the low voltage ground; More,
    상기 아날로그디지털변환기의 동작은 상기 스위치에 동작 상태에 따라 선택적으로 제어되는 것을 특징으로 하는 고전압 이차전지의 퓨즈 진단 장치.The operation of the analog-to-digital converter is a fuse diagnostic apparatus for a high voltage secondary battery, characterized in that the switch is selectively controlled according to the operating state.
  10. 청구항 6에 있어서,The method according to claim 6,
    상기 퓨즈가 정상 상태일 경우의 상기 아날로그디지털변환기의 출력 값인 정상 상태 출력 값이 미리 수록된 기억 소자; 를 더 포함하며,A memory device in which a steady state output value, which is an output value of the analog-digital converter when the fuse is in a normal state, is stored in advance; More,
    상기 제어부는 상기 아날로그디지털변환기의 출력 값과 미리 수록된 상기 정상 상태 출력 값이 서로 동일한 값을 갖는지 판단하고, 상기 판단 결과, 상기 아날로그디지털변환기의 출력 값이 미리 수록된 상기 정상 상태 출력 값과 서로 다른 경우, 상기 퓨즈의 상태를 불량으로 진단하는 것을 특징으로 하는 고전압 이차전지의 퓨즈 진단 장치.The controller determines whether the output value of the analog-to-digital converter and the previously recorded steady state output value have the same value, and if the output value of the analog-to-digital converter is different from the previously recorded steady state output value And a fuse diagnosing state of the fuse as defective.
PCT/KR2016/013549 2015-11-27 2016-11-23 Fuse diagnosis device of high-voltage secondary battery WO2017090980A1 (en)

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