KR20160007798A - Apparatus and method for detecting overheating of heater for fuel cell vehicle - Google Patents

Apparatus and method for detecting overheating of heater for fuel cell vehicle Download PDF

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KR20160007798A
KR20160007798A KR1020140081145A KR20140081145A KR20160007798A KR 20160007798 A KR20160007798 A KR 20160007798A KR 1020140081145 A KR1020140081145 A KR 1020140081145A KR 20140081145 A KR20140081145 A KR 20140081145A KR 20160007798 A KR20160007798 A KR 20160007798A
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heater
cooling water
current
pressure
control unit
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KR1020140081145A
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Korean (ko)
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한수동
김형국
박훈우
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현대자동차주식회사
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    • 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
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/0053—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to fuel cells
    • 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
    • B60L58/30—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells
    • B60L58/32—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells for controlling the temperature of fuel cells, e.g. by controlling the electric load
    • B60L58/34—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells for controlling the temperature of fuel cells, e.g. by controlling the electric load by heating
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04298—Processes for controlling fuel cells or fuel cell systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04298—Processes for controlling fuel cells or fuel cell systems
    • H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
    • H01M8/04664—Failure or abnormal function
    • H01M8/04679—Failure or abnormal function of fuel cell stacks
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04298—Processes for controlling fuel cells or fuel cell systems
    • H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
    • H01M8/04701—Temperature
    • H01M8/04723—Temperature of the coolant
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2400/00—Special features of vehicle units
    • B60Y2400/20—Energy converters
    • B60Y2400/202—Fuel cells
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2400/00—Special features of vehicle units
    • B60Y2400/30—Sensors
    • B60Y2400/306—Pressure sensors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2400/00—Special features of vehicle units
    • B60Y2400/30—Sensors
    • B60Y2400/308—Electric sensors
    • B60Y2400/3084—Electric currents sensors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2250/00—Fuel cells for particular applications; Specific features of fuel cell system
    • H01M2250/20—Fuel cells in motive systems, e.g. vehicle, ship, plane
    • 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
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/40—Application of hydrogen technology to transportation, e.g. using fuel cells
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S903/00—Hybrid electric vehicles, HEVS
    • Y10S903/902—Prime movers comprising electrical and internal combustion motors
    • Y10S903/903—Prime movers comprising electrical and internal combustion motors having energy storing means, e.g. battery, capacitor
    • Y10S903/944—Characterized by control of fuel cell

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Energy (AREA)
  • Sustainable Development (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Fuel Cell (AREA)

Abstract

The present invention relates to an apparatus and a method for detecting overheating in a heater in a fuel cell vehicle. According to the present invention, overheating detection is possible in the heater of the fuel cell vehicle by using cooling water pressure and heater current. Current applied to cooling water heater and cooling water pressure is measured by pressure sensor and current sensor mounted on a heat regulation system. Based on the measured cooling water pressure and current, shortage in the cooling water and heat emission is checked. In addition, overheating state is determined depending on the checked outcome derived from the shortage in cooling water and the heat emission from the heater.

Description

연료전지차량의 히터 과열 감지 장치 및 방법{APPARATUS AND METHOD FOR DETECTING OVERHEATING OF HEATER FOR FUEL CELL VEHICLE}TECHNICAL FIELD [0001] The present invention relates to an apparatus and a method for detecting a heater overheat of a fuel cell vehicle,

본 발명은 냉각수 압력 및 히터 전류를 이용하여 연료전지차량 내 히터 과열을 감지할 수 있도록 하는 연료전지차량의 히터 과열 감지 장치 및 방법에 관한 것이다.The present invention relates to an apparatus and a method for detecting a heater overheat of a fuel cell vehicle that can detect a heater overheat in a fuel cell vehicle using a coolant pressure and a heater current.

연료전지 자동차는 기존의 가솔린/디젤 엔진 대신 연료전지 파워크레인이 장착되며 주요 구성요소로는 연료전지 스택, 운전장치 시스템, 전기동력 시스템, 제어시스템 등이 장착된다. 이중에서 운전장치 시스템은 스택 운전에 필수적인 시스템으로, 열관리 시스템, 공기 공급 시스템, 수소 공급 시스템으로 구성된다.The fuel cell vehicle is equipped with a fuel cell power crane instead of a conventional gasoline / diesel engine. The main components are a fuel cell stack, a driving device system, an electric power system, and a control system. Of these, the operating system is an essential system for stack operation, and consists of a thermal management system, an air supply system, and a hydrogen supply system.

열관리 시스템(Thermal Management System, TMS)에는 냉각수를 순환시키는 펌프, 냉각수 온도에 따라 유로를 결정해주는 3방 밸브, 냉각수 전기 전도도 유지를 위한 냉각수 이온 필터, 실내 공조 장치, 냉각모듈, 스택 냉시동성(fuel cell cold start) 및 내구성 향상을 위한 COD(Cathode Oxygen Depletion) 히터 등으로 구성된다.The thermal management system (TMS) includes a pump for circulating cooling water, a three-way valve for determining the flow path according to the temperature of the cooling water, a cooling water ion filter for maintaining the cooling water electrical conductivity, an indoor air conditioning unit, a cooling module, cell cold start) and a COD (Cathode Oxygen Depletion) heater for improving durability.

기존의 COD 히터는 냉각수 유량이 부족하거나 냉각수가 순환하지 않을 경우 히터 표면이 과열되어 손상될 수 있다. 이에, 종래에는 히터 내부에 써모커플(Thermocouple, T/C)을 설치하여 각 히터 내부의 온도를 측정하고 그 측정된 온도데이터를 히터 제어기가 수신받아 과열 여부를 판단한다(특허문헌 1 참조).Conventional COD heaters can overheat the heater surface and become damaged if the cooling water flow rate is insufficient or the cooling water is not circulated. Conventionally, a thermocouple (T / C) is installed inside the heater to measure the temperature inside each heater, and the heater controller receives the measured temperature data to determine whether or not the heater is overheated (see Patent Document 1).

이러한 종래기술은 히터마다 내부 온도를 측정할 써모커플이 필요하며 과열 감지 제어기가 있어야 한다.This prior art requires a thermocouple to measure the internal temperature for each heater and must have an overheat detection controller.

또한, 종래기술은 히터내 장착된 써모커플이 온도를 측정할 수 있는 범위를 제외한 히터 부위 과열 시 과열 판단이 늦어질 수 있다.Further, in the prior art, the overheating judgment may be delayed when the heater portion is overheated, except in a range where the thermocouple mounted in the heater can measure the temperature.

또한, 종래기술은 냉각수 부족으로 냉각수 내 기포가 다수 존재할 경우 히터 과열 판단이 어려워질 수 있다.Further, in the prior art, when there are a large number of bubbles in the cooling water due to the shortage of cooling water, it may be difficult to judge the overheating of the heater.

KRKR 10201100128371020110012837 AA

본 발명은 상기한 배경기술을 감안하여 안출한 것으로서, 냉각수 압력 및 히터 전류를 이용하여 연료전지차량 내 히터 과열을 감지할 수 있도록 하는 연료전지차량의 히터 과열 감지 장치 및 방법을 제공하는데 그 목적이 있다.SUMMARY OF THE INVENTION It is an object of the present invention to provide an apparatus and method for detecting a heater overheat in a fuel cell vehicle, which can detect a heater overheat in a fuel cell vehicle by using a cooling water pressure and a heater current. have.

상기한 과제를 해결하기 위하여, 본 발명의 실시예에 따른 연료전지차량의 히터 과열 감지 장치는 열관리시스템 내 연료전지 스택의 입구와 연결된 냉각수 순환라인에 장착되어 냉각수 압력을 측정하는 압력센서와, 상기 스택과 냉각수 히터 사이에 장착되어 상기 냉각수 히터에 인가되는 전류를 측정하는 전류센서와, 상기 압력센서 및 상기 전류센서로부터 출력되는 압력 신호 및 전류 신호에 근거하여 히터 작동 상태를 판정하는 히터 제어부를 포함하는 것을 특징으로 한다.In order to solve the above problems, a heater overheat sensing apparatus of a fuel cell vehicle according to an embodiment of the present invention includes a pressure sensor mounted on a cooling water circulation line connected to an inlet of a fuel cell stack in a thermal management system, A current sensor mounted between the stack and the cooling water heater for measuring a current applied to the cooling water heater and a heater control unit for determining a heater operation state based on the pressure signal and the current signal output from the pressure sensor and the current sensor .

또한, 상기 히터 제어부는 상기 압력 신호의 변화폭 및 기울기 부호 변화 횟수로 냉각수 부족 여부를 결정하는 것을 특징으로 한다.Further, the heater control unit determines whether the cooling water is insufficient based on the variation width of the pressure signal and the number of slope code changes.

또한, 상기 히터 제어부는 상기 전류 신호에 근거하여 상기 냉각수 히터로 전류가 인가되는지 여부를 확인하는 것을 특징으로 한다.The heater control unit may determine whether a current is applied to the coolant heater based on the current signal.

또한, 상기 히터 제어부는 상기 냉각수 압력 이상이며 상기 냉각수 히터로 전류가 인가되면 히터 과열로 판정하는 것을 특징으로 한다.Further, the heater control unit determines that the heater is overheated when the cooling water pressure is higher than the cooling water pressure and current is applied to the cooling water heater.

또한, 상기 히터 제어부는 상기 히터 작동 상태 판정 시 연료전지 제어기로부터 히터 릴레이 작동명령 수신여부를 고려하는 것을 특징으로 한다.Further, the heater control unit may consider whether or not the heater relay operation command is received from the fuel cell controller when the heater operation state is determined.

또한, 상기 히터 제어부는 상기 히터 릴레이 작동명령 수신 시 상기 냉각수 압력 이상이며 상기 냉각수 히터로 전류가 인가되지 않으면 릴레이 또는 히터 고장으로 판정하는 것을 특징으로 한다.The heater control unit may determine that the relay or the heater is faulty if the cooling water pressure is higher than the cooling water pressure when the heater relay operation command is received and the current is not applied to the cooling water heater.

또한, 상기 히터 제어부는 상기 히터 릴레이 작동명령 미수신시 상기 냉각수 압력 이상이며 상기 냉각수 히터로 전류가 미인가되면 히터 정상으로 판정하는 것을 특징으로 한다.Further, the heater control unit determines that the heater is normal when the coolant pressure is higher than the coolant pressure when the heater relay operation command is not received and the current is not good to the coolant heater.

또한, 상기 히터 제어부는 상기 히터 릴레이 작동명령 수신시 상기 냉각수 압력 정상이며 상기 냉각수 히터로 전류가 인가되면 히터가 정상 발열으로 판정하는 것을 특징으로 한다.In addition, the heater control unit determines that the coolant pressure is normal when the heater relay operation command is received, and determines that the heater generates a normal heat when a current is applied to the coolant heater.

또한, 상기 히터 제어부는 상기 히터 릴레이 작동명령 미수신시 상기 냉각수 압력 정상이며 상기 냉각수 히터로 전류가 인가되면 릴레이 고장으로 판정하는 것을 특징으로 한다.Further, the heater control unit determines that the coolant pressure is normal when the heater relay operation command is not received, and determines that the relay fails if a current is applied to the coolant heater.

또한, 상기 히터 제어부는 상기 히터 릴레이 작동명령 수신시 상기 냉각수 압력 정상이며 상기 냉각수 히터로 전류가 인가되지 않으면 릴레이 또는 히터 고장으로 판정하는 것을 특징으로 한다.Further, the heater control unit determines that the coolant pressure is normal when the heater relay operation command is received, and determines that the relay or the heater has failed if no current is applied to the coolant heater.

또한, 상기 히터 제어부는, 상기 히터 릴레이 작동명령 미수신시 상기 냉각수 압력 정상이며 상기 냉각수 히터로 전류가 인가되지 않으면 히터 정상으로 판정하는 것을 특징으로 한다.Further, the heater control unit determines that the heater is normal if the coolant pressure is normal when the heater relay operation command is not received and the current is not applied to the coolant heater.

본 발명의 일 실시예에 따른 연료전지차량의 히터 과열 감지 방법은 열관리시스템 상에 장착된 압력센서 및 전류센서를 통해 냉각수 압력 및 히터로 인가되는 전류를 측정하는 단계와, 상기 압력센서 및 전류센서를 통해 측정된 냉각수 압력 및 전류에 근거하여 냉각수 부족 여부 및 히터 발열 여부를 확인하는 단계와, 상기 냉각수 부족 여부 및 히터 발열 여부의 확인결과에 따라 히터 과열 여부를 판정하는 단계를 포함하는 것을 특징으로 한다.A method of sensing a heater overheat of a fuel cell vehicle according to an embodiment of the present invention includes the steps of measuring a coolant pressure and a current applied to a heater through a pressure sensor and a current sensor mounted on a thermal management system, And determining whether the heater is overheated in accordance with whether the coolant is insufficient and whether or not the heater is heated. According to another aspect of the present invention, do.

본 발명은 압력센서를 통해 냉각수 압력을 모니터링하여 냉각수 부족 여부를 감지하고 전류 센서를 통해 히터로 인가되는 전류를 측정하여 히터 발열 여부를 감지하여 냉각수 부족여부 및 히터 발열여부에 따라 히터 과열 여부를 감지할 수 있다. 즉, 본 발명은 압력센서 및 전류센서의 조합을 통해 히터 과열을 감지할 수 있다.The present invention monitors the coolant pressure by monitoring the coolant pressure through a pressure sensor and measures the current applied to the heater through the current sensor to detect whether the heater is heated so as to detect whether the heater is overheated can do. That is, the present invention can detect a heater overheat through a combination of a pressure sensor and a current sensor.

또한, 본 발명은 각 히터 내부에 장착되는 써모커플 및 과열 감지용 히터 제어기를 제거할 수 있어 열관리시스템의 제조원가 및 중량, 부피를 축소할 수 있다.In addition, the present invention can eliminate the thermocouple and the heater controller for detecting the overheat, which are installed in each heater, so that the manufacturing cost, weight, and volume of the thermal management system can be reduced.

또한, 본 발명은 전류센서에 의해 측정되는 히터 인가 전류를 연료전지 상위 제어기가 실시간 모니터링하므로 히터 발열 유무를 지속적으로 확인할 수 있어, 저유량 혹은 냉각수 미순환 시 히터 과열로 인한 화재 및 전기 안전성 확보가 가능하다.In addition, since the heater-applied current measured by the current sensor is monitored in real time by the host controller of the fuel cell, the presence or absence of the heater heating can be continuously checked, It is possible.

도 1은 본 발명의 일 실시예에 따른 연료전지차량의 히터 과열 감지 장치의 블록구성도.
도 2는 도 1에 도시된 압력센서 및 전류센서의 배치도.
도 3은 본 발명의 일 실시예에 따른 연료전지차량의 히터 과열 감지 방법을 도시한 흐름도.1 is a block diagram of a heater overheat sensing apparatus of a fuel cell vehicle according to an embodiment of the present invention;
Fig. 2 is a layout diagram of the pressure sensor and the current sensor shown in Fig. 1. Fig.
3 is a flowchart illustrating a method of detecting a heater overheat of a fuel cell vehicle according to an embodiment of the present invention.

이하, 첨부된 도면들을 참조하여 본 발명의 실시예를 상세하게 설명한다.Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명의 일 실시예에 따른 연료전지차량의 히터 과열 감지 장치의 블록구성도이다.1 is a block diagram of a heater overheat sensing apparatus of a fuel cell vehicle according to an embodiment of the present invention.

본 발명에 따른 연료전지차량의 히터 과열 감지 장치는 압력센서(10), 전류센서(20), 히터 제어부(30), 연료전지 제어기(40)를 포함한다.The heater overheat sensing apparatus of the fuel cell vehicle according to the present invention includes a pressure sensor 10, a current sensor 20, a heater control unit 30, and a fuel cell controller 40.

압력센서(10)는 열관리시스템(Thermal Management System, TMS) 내 냉각수 순환라인에 장착되어 냉각수 압력을 측정한다.The pressure sensor 10 is mounted on a cooling water circulation line in a thermal management system (TMS) to measure the cooling water pressure.

전류센서(20)는 열관리시스템 내 장착된 냉각수 히터로 인가되는 전류를 측정한다. 전류센서에 의해 측정되는 전류값은 연료전지 상위 제어기가 실시간 모니터링하므로 히터 발열 유무를 지속적으로 확인할 수 있다.The current sensor 20 measures the current applied to the cooling water heater mounted in the thermal management system. Since the current value measured by the current sensor is monitored in real time by the controller of the fuel cell host, it is possible to continuously check whether or not the heater is heated.

히터 제어부(30)는 압력센서(10) 및 전류센서(20)로부터 출력되는 압력 신호 및 전류 신호에 근거하여 히터 작동 상태를 판정한다.The heater control unit 30 determines the heater operation state based on the pressure signal and the current signal output from the pressure sensor 10 and the current sensor 20. [

히터 제어부(30)는 압력 신호의 변화폭 및 기울기 부호 변화 횟수로 냉각수 부족 여부를 결정한다. 여기서, 히터 제어부(30)는 본 출원인이 특허출원한 제10-2012-0048192호에 개시된 냉각수 수위 감지 기술을 이용하여 냉각수 부족여부를 확인할 수 있다.The heater control unit 30 determines whether or not the cooling water is insufficient based on the variation width of the pressure signal and the number of changes of the slope code. Here, the heater control unit 30 can check whether the cooling water is insufficient by using the cooling water level sensing technology disclosed in the patent application No. 10-2012-0048192 filed by the present applicant.

히터 제어부(30)는 전류 신호에 근거하여 냉각수 히터로 전류가 인가되는지 여부를 확인한다. 즉, 히터 제어부(30)는 냉각수 히터의 발열 여부를 확인한다. 예컨대, 히터 제어부(30)는 냉각수 히터로 전류가 인가되면 냉각수 히터 발열 상태로 감지하고, 냉각수 히터로 전류가 인가되지 않으면 냉각수 히터 미발열 상태로 감지한다.The heater control unit 30 determines whether a current is applied to the coolant heater based on the current signal. That is, the heater control unit 30 confirms whether or not the cooling water heater generates heat. For example, when a current is applied to the cooling water heater, the heater control unit 30 senses the cooling water heater as an exothermic state. If no current is applied to the cooling water heater, the controller 30 senses the cooling water heater as a non-exothermic state.

히터 제어부(30)는 냉각수 압력에 이상이 있으며, 냉각수 히터로 전류가 인가되면 히터 과열 상태로 판정한다. 다시 말해서, 히터 제어부(30)는 냉각수 부족 및 냉각수 히터 발열이 감지되면 히터 과열로 판정한다.The heater control unit 30 judges that the coolant pressure is abnormal and the heater is in an overheated state when a current is applied to the coolant heater. In other words, the heater control unit 30 determines that the heater is overheated when the cooling water shortage and the cooling water heater generation are detected.

히터 제어부(30)는 히터 작동 상태 판정 시 연료전지 제어기(40)로부터 히터 릴레이 작동명령 수신여부를 고려한다. 즉, 히터 제어부(30)는 냉각수 부족여부 및 냉각수 히터 발열여부, 히터 릴레이 작동명령 수신여부에 근거하여 [표 1]과 같이 히터 작동 상태를 결정한다.The heater control unit 30 considers whether or not the heater relay operation command is received from the fuel cell controller 40 when the heater operation state is determined. That is, the heater control unit 30 determines the heater operation state as shown in [Table 1] based on whether the coolant is insufficient, whether the coolant heater is heated, and whether the heater relay operation command is received.

Figure pat00001
Figure pat00001

[표 1]에 도시된 바와 같이, 히터 제어부(30)는 히터 릴레이 작동명령 수신 시 냉각수 압력 이상이며 냉각수 히터로 전류가 인가되지 않으면 릴레이 또는 히터 고장으로 판정한다. 즉, 히터 제어부(30)는 히터 릴레이 온 명령 수신 시 냉각수 부족이며 냉각수 히터 미발열이면 릴레이 또는 히터 고장으로 감지한다.As shown in Table 1, the heater control unit 30 determines that there is a failure of the relay or the heater if the cooling water pressure is higher than the cooling water pressure when the heater relay operation command is received and no current is applied to the cooling water heater. That is, the heater control unit 30 senses that there is a shortage of cooling water when the heater relay ON command is received and a relay or heater failure if the cooling water heater is not heated.

히터 제어부(30)는 히터 릴레이 작동명령 미수신시 냉각수 압력 이상이며 냉각수 히터로 전류가 미인가되면 히터 정상으로 판정한다. 다시 말해서, 히터 제어부(30)는 히터 릴레이 온 명령 미수신 시 냉각수 부족 및 냉각수 미발열이면 히터 정상으로 인식한다.The heater control unit 30 determines that the heater is normal when the coolant pressure is higher than the coolant pressure when the heater relay operation command is not received and the coolant heater has a bad current. In other words, the heater control unit 30 recognizes that the heater is normal if the coolant is insufficient when the heater relay-on command is not received and the coolant is not heated.

히터 제어부(30)는 히터 릴레이 작동명령 수신시 냉각수 압력 정상이며 냉각수 히터로 전류가 인가되면 히터가 정상 발열으로 판정한다. 히터 제어부(30)는 히터 릴레이 온 명령 수신 시 냉각수가 충분하며 냉각수 히터 발열이면 히터 정상 발열로 감지한다.The heater control unit 30 determines that the coolant pressure is normal when the heater relay operation command is received and that the heater is in a normal heat generation state when a current is applied to the coolant heater. The heater control unit 30 senses that the coolant is sufficient when the heater relay ON command is received and that the heater is heated normally if the coolant heater generates heat.

히터 제어부(30)는 히터 릴레이 작동명령 미수신시 냉각수 압력 정상이며 냉각수 히터로 전류가 인가되면 릴레이 고장으로 판정한다. 다시 말해서, 히터 제어부(30)는 히터 릴레이 온 명령 미수신시 냉각수가 충분하고 냉각수 히터 발열이면 릴레이 고장으로 인식한다.The heater control unit 30 determines that the coolant pressure is normal when the heater relay operation command is not received and that a relay failure occurs when a current is applied to the coolant heater. In other words, the heater control section 30 recognizes that there is sufficient cooling water at the time of not receiving the heater relay on command, and that the relay failure occurs if the cooling water heater generates heat.

히터 제어부(30)는 히터 릴레이 작동명령 수신시 냉각수 압력 정상이며 냉각수 히터로 전류가 인가되지 않으면 릴레이 또는 히터 고장으로 판정한다. 히터 제어부(30)는 히터 릴레이 온 명령 수신 시 냉각수 충분 상태이고 냉각수 히터 미발열이면 릴레이 또는 히터 고장으로 감지한다.The heater control unit 30 determines that the coolant pressure is normal when the heater relay operation command is received and that no current is supplied to the coolant heater. The heater control unit 30 senses that the coolant is in a sufficient state when the heater relay ON command is received and the relay or the heater fails if the coolant heater is not heated.

히터 제어부(30)는 히터 릴레이 작동명령 미수신시 냉각수 압력 정상이며 냉각수 히터로 전류가 인가되지 않으면 히터 정상으로 판정한다. 히터 제어부(30)는 히터 릴레이 온 명령이 미수신 시 냉각수가 충분하며 냉각수 히터가 발열상태가 아니면 히터 정상으로 인식한다.The heater control unit 30 determines that the coolant pressure is normal when the heater relay operation command is not received and the heater is normal when no current is applied to the coolant heater. The heater control unit 30 recognizes that the heater is normal when the coolant heater is not in an exothermic state while the coolant is sufficient when the heater relay on command is not received.

이와 같이, 히터 제어부(30)는 연료전지 제어기(40)로부터 전송되는 동작제어명령(히터 릴레이 작동명령)에 따라 냉각수 히터의 릴레이를 온 또는 오프하여 동작을 제어한다. 히터 제어부(30)는 릴레이 온/오프 제어 시 센서들(10, 20)를 통해 냉각수 압력 및 냉각수 히터 전류를 모니터링하여 냉각수 히터의 동작상태를 확인할 수 있다.In this way, the heater control unit 30 controls the operation by turning on or off the relay of the cooling water heater in accordance with the operation control command (heater relay operation command) transmitted from the fuel cell controller 40. The heater control unit 30 can monitor the operation state of the cooling water heater by monitoring the cooling water pressure and the cooling water heater current through the sensors 10 and 20 during relay on / off control.

도 2는 도 1에 도시된 압력센서 및 전류센서의 배치도를 도시한다.Fig. 2 shows a layout of the pressure sensor and the current sensor shown in Fig.

열관리시스템은 리저버(1), 가압캡(2), 라디에이터(3), 3방 밸브(4), 공조 히터(5), 이온 필터(6), 펌프(7), 냉각수 히터(8), 스택(9)를 포함한다.The heat management system includes a reservoir 1, a pressure cap 2, a radiator 3, a three-way valve 4, an air conditioning heater 5, an ion filter 6, a pump 7, a cooling water heater 8, (9).

리저버(reservoir)(1)는 냉각수를 저장하는 공간으로, 라디에이터(3)에서 넘치는 냉각수를 수용하거나 부족한 냉각수를 보충하는 역할을 한다.The reservoir 1 is a space for storing cooling water. The reservoir 1 serves to receive the cooling water overflowing from the radiator 3 or to supplement the cooling water which is insufficient.

라디에이터(radiator)(3)는 스택(9)로부터 냉각을 마치고 배출된 냉각수를 냉각한다. 라디에이터(3)의 상단에는 가압캡(2)이 장착되어 라디에이터(3)을 가압한다.The radiator 3 finishes cooling from the stack 9 and cools the discharged cooling water. A pressure cap 2 is mounted on the upper end of the radiator 3 to press the radiator 3.

라디에이터(3)의 출구에는 3방 밸브(4) 및 펌프(7), 냉각수 히터(8)가 순차적으로 배열된다.A three-way valve (4), a pump (7), and a cooling water heater (8) are sequentially arranged at the outlet of the radiator (3).

3방 밸브(4)는 냉각수 온도에 따라 유로를 결정하고, 펌프(7)는 냉각수를 연료전지 스택(9)으로 순환시키는 역할을 한다. The three-way valve 4 determines the flow path according to the cooling water temperature, and the pump 7 functions to circulate the cooling water to the fuel cell stack 9. [

냉각수 히터(8)는 냉각수를 데워 냉각수 온도를 증가시키며 스택(9) 내 잔류하는 수소 및 산소를 제거한다. 이러한 냉각수 히터(8)는 COD(Cathode Oxygen Depletion) 히터로 구현된다. 냉각수 히터(8)는 연료전지 제어기(40)로부터 출력되는 히터 릴레이 작동명령에 따라 릴레이 온 또는 오프(ON 또는 OFF)를 통해 동작한다.A coolant heater (8) warms the coolant to increase the coolant temperature and removes residual hydrogen and oxygen in the stack (9). This cooling water heater 8 is implemented by a COD (Cathode Oxygen Depletion) heater. The coolant heater 8 operates via relay ON or OFF (ON or OFF) in accordance with the heater relay operation command output from the fuel cell controller 40.

공조 히터(5) 및 이온필터(6)는 펌프(7) 및 냉각수 히터(8)와 병렬로 배치된다.The air conditioning heater (5) and the ion filter (6) are arranged in parallel with the pump (7) and the cooling water heater (8).

공조 히터(5)는 차량 실내의 난방을 조절하는 HVAC(heating, ventilation, and air conditioning) 히터이다.The air conditioning heater 5 is a heating, ventilation, and air conditioning (HVAC) heater for controlling the heating of the vehicle interior.

이온필터(6)는 냉각수 전기 전도도를 유지하기 위하여 냉각수 내 이온을 필터링한다.The ion filter 6 filters ions in the cooling water to maintain the electrical conductivity of the cooling water.

연료전지 스택(9)은 수소와 산소의 화학반응을 통해 전기에너지를 생성한다. 연료전지 스택(9)은 화학반응 시 발생하는 열을 라디에이터(3)에서 냉각된 저온의 냉각수로 식힌다.The fuel cell stack 9 generates electrical energy through a chemical reaction between hydrogen and oxygen. The fuel cell stack 9 cools the heat generated during the chemical reaction into the cooling water of the low temperature cooled in the radiator 3.

연료전지 스택(9)의 상단부에는 압력센서(10)가 배치된다. 압력센서(10)는 연료전지 스택(9)의 입구와 연결된 냉각수 순환라인에 장착되어 냉각수 압력을 측정한다.At the upper end of the fuel cell stack 9, a pressure sensor 10 is disposed. The pressure sensor 10 is mounted on a cooling water circulation line connected to the inlet of the fuel cell stack 9 to measure the cooling water pressure.

냉각수 히터(8)과 연료전지 스택(9) 사이에는 전류센서(20)가 설치된다. 전류센서(20)는 냉각수 히터(8)로 인가되는 전류값을 측정한다.A current sensor 20 is provided between the cooling water heater 8 and the fuel cell stack 9. [ The current sensor 20 measures the current value applied to the cooling water heater 8.

도 3은 본 발명의 일 실시예에 따른 연료전지차량의 히터 과열 감지 방법을 도시한 흐름도이다.3 is a flowchart illustrating a method of detecting a heater overheat of a fuel cell vehicle according to an embodiment of the present invention.

먼저, 히터 제어부(30)는 열관리시스템 상에 장착된 압력센서(10) 및 전류센서(20)를 통해 냉각수 압력 및 냉각수 히터(8)로 인가되는 전류를 측정한다(S11).First, the heater control unit 30 measures the cooling water pressure and the current applied to the cooling water heater 8 through the pressure sensor 10 and the current sensor 20 mounted on the thermal management system (S11).

히터 제어부(30)는 압력센서(10) 및 전류센서(20)를 통해 측정된 냉각수 압력 및 전류에 근거하여 냉각수 부족 여부 및 히터 발열 여부를 확인한다(S12). 다시 말해서, 히터 제어부(30)는 압력센서(10) 및 전류센서(20)로부터 출력되는 측정데이터에 근거하여 냉각수 부족 여부 및 히터 발열 여부를 감지한다.The heater control unit 30 determines whether the cooling water is insufficient and whether the heater is heated based on the cooling water pressure and current measured through the pressure sensor 10 and the current sensor 20 (S12). In other words, the heater control unit 30 detects whether the cooling water is insufficient and whether or not the heater is heated based on the measurement data output from the pressure sensor 10 and the current sensor 20.

그리고, 히터 제어부(30)는 감지한 냉각수 부족 여부 및 히터 발열 여부에 따라 히터 과열 여부를 판정한다(S13). 이때, 히터 제어부(30)는 냉각수 부족이며 히터 발열이면 히터 과열 상태로 감지한다.Then, the heater control unit 30 determines whether or not the heater is overheat depending on whether the detected coolant is insufficient and whether the heater is heated (S13). At this time, the heater control unit 30 detects that the heater is overheated if the cooling water is insufficient and the heater is heated.

10: 압력센서
20: 전류센서
30: 히터 제어부
40: 연료전지 제어기10: Pressure sensor
20: Current sensor
30:
40: Fuel cell controller

Claims (12)

열관리시스템 내 연료전지 스택의 입구와 연결된 냉각수 순환라인에 장착되어 냉각수 압력을 측정하는 압력센서와,
상기 스택과 냉각수 히터 사이에 장착되어 상기 냉각수 히터에 인가되는 전류를 측정하는 전류센서와,
상기 압력센서 및 상기 전류센서로부터 출력되는 압력 신호 및 전류 신호에 근거하여 히터 작동 상태를 판정하는 히터 제어부를 포함하는 것을 특징으로 하는 연료전지차량의 히터 과열 감지 장치.A pressure sensor mounted on a cooling water circulation line connected to an inlet of the fuel cell stack in the heat management system to measure cooling water pressure,
A current sensor mounted between the stack and the cooling water heater for measuring a current applied to the cooling water heater,
And a heater controller for determining a heater operation state based on the pressure signal and the current signal output from the pressure sensor and the current sensor. 제1항에 있어서,
상기 히터 제어부는,
상기 압력 신호의 변화폭 및 기울기 부호 변화 횟수로 냉각수 부족 여부를 결정하는 것을 특징으로 하는 연료전지차량의 히터 과열 감지 장치.The method according to claim 1,
The heater control unit,
Wherein the controller determines whether the cooling water is insufficient based on the variation of the pressure signal and the number of changes of the slope code. 제1항에 있어서,
상기 히터 제어부는,
상기 전류 신호에 근거하여 상기 냉각수 히터로 전류가 인가되는지 여부를 확인하는 것을 특징으로 하는 연료전지차량의 히터 과열 감지 장치.The method according to claim 1,
The heater control unit,
And determines whether or not current is applied to the cooling water heater based on the current signal. 제1항에 있어서,
상기 히터 제어부는,
상기 냉각수 압력 이상이며 상기 냉각수 히터로 전류가 인가되면 히터 과열로 판정하는 것을 특징으로 하는 연료전지차량의 히터 과열 감지 장치.The method according to claim 1,
The heater control unit,
Wherein the controller determines that the heater is overheated when the cooling water pressure is higher than the cooling water pressure and current is applied to the cooling water heater. 제1항에 있어서,
상기 히터 제어부는,
상기 히터 작동 상태 판정 시 연료전지 제어기로부터 히터 릴레이 작동명령 수신여부를 고려하는 것을 특징으로 하는 연료전지차량의 히터 과열 감지 장치.The method according to claim 1,
The heater control unit,
Wherein the control unit considers whether or not the heater relay operation command is received from the fuel cell controller when the heater operation state is determined. 제5항에 있어서,
상기 히터 제어부는,
상기 히터 릴레이 작동명령 수신 시 상기 냉각수 압력 이상이며 상기 냉각수 히터로 전류가 인가되지 않으면 릴레이 또는 히터 고장으로 판정하는 것을 특징으로 하는 연료전지차량의 히터 과열 감지 장치.6. The method of claim 5,
The heater control unit,
Wherein when the heater relay operation command is received and the cooling water pressure is higher than the cooling water pressure and the current is not applied to the cooling water heater, it is determined that the relay or the heater has failed. 제5항에 있어서,
상기 히터 제어부는,
상기 히터 릴레이 작동명령 미수신시 상기 냉각수 압력 이상이며 상기 냉각수 히터로 전류가 미인가되면 히터 정상으로 판정하는 것을 특징으로 하는 연료전지차량의 히터 과열 감지 장치.6. The method of claim 5,
The heater control unit,
Wherein the controller determines that the heater is normal if the cooling water pressure is higher than the cooling water pressure when the heater relay operation command is not received and the current is not good to the cooling water heater. 제5항에 있어서,
상기 히터 제어부는,
상기 히터 릴레이 작동명령 수신시 상기 냉각수 압력 정상이며 상기 냉각수 히터로 전류가 인가되면 히터가 정상 발열으로 판정하는 것을 특징으로 하는 연료전지차량의 히터 과열 감지 장치.6. The method of claim 5,
The heater control unit,
Wherein when the coolant pressure is normal and a current is applied to the coolant heater when the heater relay operation command is received, the heater determines that the coolant heater is in a normal heat generation state. 제5항에 있어서,
상기 히터 제어부는,
상기 히터 릴레이 작동명령 미수신시 상기 냉각수 압력 정상이며 상기 냉각수 히터로 전류가 인가되면 릴레이 고장으로 판정하는 것을 특징으로 하는 연료전지차량의 히터 과열 감지 장치.6. The method of claim 5,
The heater control unit,
Wherein when the temperature of the cooling water is normal at the time of not receiving the heater relay operation command and the current is applied to the cooling water heater, it is determined that the relay is faulty. 제5항에 있어서,
상기 히터 제어부는,
상기 히터 릴레이 작동명령 수신시 상기 냉각수 압력 정상이며 상기 냉각수 히터로 전류가 인가되지 않으면 릴레이 또는 히터 고장으로 판정하는 것을 특징으로 하는 연료전지차량의 히터 과열 감지 장치.6. The method of claim 5,
The heater control unit,
Wherein when the cooling water pressure is normal when the heater relay operation command is received and the current is not applied to the cooling water heater, the controller determines that the relay or the heater is faulty. 제5항에 있어서,
상기 히터 제어부는,
상기 히터 릴레이 작동명령 미수신시 상기 냉각수 압력 정상이며 상기 냉각수 히터로 전류가 인가되지 않으면 히터 정상으로 판정하는 것을 특징으로 하는 연료전지차량의 히터 과열 감지 장치.6. The method of claim 5,
The heater control unit,
Wherein the controller determines that the heater is normal when the coolant pressure is normal and the current is not applied to the coolant heater when the heater relay operation command is not received. 열관리시스템 상에 장착된 압력센서 및 전류센서를 통해 냉각수 압력 및 히터로 인가되는 전류를 측정하는 단계와,
상기 압력센서 및 전류센서를 통해 측정된 냉각수 압력 및 전류에 근거하여 냉각수 부족 여부 및 히터 발열 여부를 확인하는 단계와,
상기 냉각수 부족 여부 및 히터 발열 여부의 확인결과에 따라 히터 과열 여부를 판정하는 단계를 포함하는 것을 특징으로 하는 연료전지차량의 히터 과열 감지 방법.Measuring a coolant pressure and a current applied to the heater through a pressure sensor and a current sensor mounted on the thermal management system,
Determining whether the cooling water is insufficient and heating the heater based on the cooling water pressure and the current measured through the pressure sensor and the current sensor;
And determining whether or not the heater is overheat in accordance with a result of checking whether the cooling water is insufficient and whether the heater is heated.
KR1020140081145A 2014-06-30 2014-06-30 Apparatus and method for detecting overheating of heater for fuel cell vehicle KR20160007798A (en)

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KR20220072096A (en) * 2020-11-24 2022-06-02 (주) 존인피니티 Heating module for stack warm-up of Fuel Cell Electric Vehicles

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KR20110012837A (en) 2009-07-31 2011-02-09 현대자동차주식회사 System and method for preventing heater of fuel cell vehicle from overheating

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Publication number Priority date Publication date Assignee Title
KR20110012837A (en) 2009-07-31 2011-02-09 현대자동차주식회사 System and method for preventing heater of fuel cell vehicle from overheating

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20220072096A (en) * 2020-11-24 2022-06-02 (주) 존인피니티 Heating module for stack warm-up of Fuel Cell Electric Vehicles

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