KR20060130950A - Fuel cell stack construction method in fuel cell car - Google Patents

Fuel cell stack construction method in fuel cell car Download PDF

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KR20060130950A
KR20060130950A KR1020050050690A KR20050050690A KR20060130950A KR 20060130950 A KR20060130950 A KR 20060130950A KR 1020050050690 A KR1020050050690 A KR 1020050050690A KR 20050050690 A KR20050050690 A KR 20050050690A KR 20060130950 A KR20060130950 A KR 20060130950A
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fuel cell
cell stack
pressure
stack
internal resistance
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KR1020050050690A
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Korean (ko)
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전의식
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현대모비스 주식회사
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
    • H01M8/2465—Details of groupings of fuel cells
    • H01M8/247—Arrangements for tightening a stack, for accommodation of a stack in a tank or for assembling different tanks
    • 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
    • H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
    • H01M8/2457—Grouping of fuel cells, e.g. stacking of fuel cells with both reactants being gaseous or vaporised
    • 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

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

Abstract

Provided is a method for manufacturing fuel cell stacks for fuel cell vehicles, which provides fuel cell stacks with improved reliance and uniform performances by determining an assembling pressure of a fuel cell stack through internal resistance. The method for manufacturing fuel cell stacks for fuel cell vehicles comprises: an airtightness measurement step of measuring the airtightness of a fuel cell stack by applying a fixed pressure(Pa) to a fuel cell stack formed by stacking unit cells in order to meet the designed capacity; a normal operation measurement step of, if the airtightness of the fuel cell stack is in good condition, supplying predetermined amounts of hydrogen and air while applying a setting pressure(P) to the fuel cell stack; an assembling pressure determination step of applying, in the normal operation measurement step, AC voltage to the fuel cell stack from the outside to measure if the internal resistance value of the stack attains a target value; and a stack assembling completion step of assembling the fuel cell stack outside using fastening implements when the internal resistance of the fuel cell stack attains a target value in the assembling pressure determination step.

Description

연료전지 차량의 연료전지 스택 제작 방법{Fuel cell stack construction method in fuel cell car}Fuel cell stack construction method in fuel cell vehicle

도 1은 본 발명에 따른 연료전지 차량의 연료전지 스택 제작 방법의 순서도1 is a flow chart of a fuel cell stack manufacturing method of a fuel cell vehicle according to the present invention.

본 발명은 연료전지 차량의 연료전지 스택에 관한 것으로, 보다 상세하게는 스택 전체에 고른 압력 분포를 형성하도록 된 연료전지 차량의 연료전지 스택 제작 방법에 관한 것이다.The present invention relates to a fuel cell stack of a fuel cell vehicle, and more particularly, to a method of manufacturing a fuel cell stack of a fuel cell vehicle configured to form an even pressure distribution throughout the stack.

최근에는 화석연료의 사용에 따른 문제점을 해결하기 위하여 음극에는 연료(수소가스나 탄화수소)를 양극에는 산소를 외부로부터 공급하여 발전하는 전지계 즉, 전해질을 사이에 두고 양극(anode)과 음극(cathode)으로 된 한쌍의 전극을 배치함과 아울러 이온화된 연료가스의 전기화학적 반응을 통해 전기와 열을 함께 얻는 연료전지시스템이 개발되고 있다.Recently, in order to solve the problems caused by the use of fossil fuels, a battery system that generates electricity by supplying fuel (hydrogen gas or hydrocarbon) to the cathode and oxygen to the anode, that is, an anode and a cathode with an electrolyte in between. A fuel cell system is being developed that arranges a pair of electrodes and obtains both electricity and heat through the electrochemical reaction of ionized fuel gas.

이러한, 연료전지에 의한 발전 방법은 연료의 연소(산화)반응을 거치지 않고 수소와 산소의 전기화학적 반응을 거쳐 반응 전후의 에너지 차를 전기에너지로 직 접 변환하는 방법으로서, 화석 연료와 같이 NOx와 SOx이 발생되지 않으며 소음과 진동이 없으면서도 열효율이 전기발전량과 열회수량을 합하여 80%이상인 친환경 발전 시스템임은 물론이다.The fuel cell power generation method directly converts the energy difference before and after the reaction into electrical energy through the electrochemical reaction between hydrogen and oxygen without undergoing combustion (oxidation) reaction of the fuel. It does not generate SOx, and it is an eco-friendly power generation system with no noise and vibration, and thermal efficiency is more than 80% of the combined electricity generation and heat recovery.

이러한, 연료전지 자동차의 운전장치(BOP, Balance of Plant)는 통상적으로, 공기를 강제로 불어넣어 주는 공기공급장치와, 수소·물공급장치, 연료전지스택 및 작동시 시스템 내의 습도와 온도, 압력 및 유량 등의 정보를 측정하는 센서류의 신호를 받아서 부품들을 제어하는 제어장치로 구성된다. The BOP (Balancing of Plant) of the fuel cell vehicle is typically an air supply unit forcibly blowing air, a hydrogen / water supply unit, a fuel cell stack, and humidity, temperature, and pressure in the system during operation. And a controller for controlling the components by receiving signals from sensors that measure information such as flow rate.

이때, 연료전지스택으로 유입되는 공기와 수소 유량 및 압력은 연료전지 스택 전·후단에 위치한 복수의 센서에 의해 검출되어 압력조절기나 콘트롤 밸브에 의해 연료전지 스택의 요구 조건에 맞도록 제어된다.At this time, air and hydrogen flow rate and pressure flowing into the fuel cell stack are detected by a plurality of sensors located at the front and rear of the fuel cell stack, and controlled by a pressure regulator or a control valve to meet the requirements of the fuel cell stack.

이와 같은, 연료 전지 스택은 그 제조시에 일반적으로, 연료전지용 단위셀(분리판 및 MEA)을 수십에서 수백장을 서로 적층하여 스택을 제조하는데, 이와 같이 스택을 적층 한후 각각의 단위 셀간 접촉저항을 낮추고 기밀성을 유지하기 위하여 체결기구를 이용하여 일정한 압력으로 체결함으로써, 연료전지 스택을 제조하게 된다.Such fuel cell stacks are generally manufactured by stacking several tens to hundreds of unit cells (separator plate and MEA) for fuel cells, and manufacturing the stacks. The fuel cell stack is manufactured by fastening at a constant pressure using a fastening mechanism to lower and maintain airtightness.

그러나, 이러한 방식의 연료 전지 스택 제조는 수십에서 수백장까지 적층 되는 단위 셀이 각각 가지는 허용 공차로 인하여 체결시 스택 전체에 고른 압력 분포를 갖도록 하기가 매우 어렵고, 또한 스택을 제작할 때마다 그 특성이 달라 외부에서 동일한 압력을 가하여도 단위전지가 받는 압력이 항상 일정하지 않게 되는 어려움이 있게 된다.However, this type of fuel cell stack manufacturing is very difficult to have an even pressure distribution throughout the stack at the fastening due to the tolerances of the unit cells stacked from tens to hundreds of sheets, and the characteristics are different each time the stack is manufactured. Even if the same pressure is applied from the outside, the pressure received by the unit cell is not always constant.

이에 본 발명은 상기와 같은 점을 감안하여 발명된 것으로, 연료 전지 스택의 내부 압력을 측정하면서 적층시켜 주어 스택 전체에 고른 압력 분포를 유지할 수 있도록 해 신뢰성을 향상함과 더불어 균일한 성능을 갖도록 함에 그 목적이 있다.Accordingly, the present invention has been invented in view of the above-described problems, and by stacking while measuring the internal pressure of the fuel cell stack, it is possible to maintain a uniform pressure distribution throughout the stack, thereby improving reliability and having uniform performance. The purpose is.

상기와 같은 목적을 달성하기 위한 본 발명은, 설계 용량에 맞추어 서로 적층된 단위 셀로 이루어진 연료전지 스택에 일정한 압력을 가해 연료전지 스택의 기밀성을 측정하는 기밀측정단계;The present invention for achieving the above object, the airtight measurement step of measuring the airtightness of the fuel cell stack by applying a constant pressure to the fuel cell stack consisting of unit cells stacked on each other in accordance with the design capacity;

상기 기밀측정단계 후 연료전지 스택의 기밀성이 양호하면 설정 압력을 연료전지 스택에 가하면서 일정량의 수소와 공기를 공급하는 정상작동측정단계;A normal operation measuring step of supplying a predetermined amount of hydrogen and air while applying a set pressure to the fuel cell stack if the airtightness of the fuel cell stack is good after the airtight measuring step;

상기 정상작동측정단계에서 연료전지 스택으로 AC 전압을 외부에서 가해 상기 스택의 내부 저항값이 목표값에 도달하는 지 측정하는 체결압결정단계;A clamping pressure determining step of measuring whether the internal resistance of the stack reaches a target value by applying an AC voltage to the fuel cell stack from the outside in the normal operation measuring step;

상기 체결압결정단계에서 연료전지 스택의 내부 저항이 목표 값이 되면 연료전지 스택을 외부에서 체결기구를 이용해 체결하는 스택제결완료단계;A stack completion step of fastening the fuel cell stack using a fastening mechanism from the outside when the internal resistance of the fuel cell stack reaches a target value in the fastening pressure determination step;

로 이루어지는 것을 특징으로 한다.Characterized in that consists of.

이하 본 발명의 실시예를 첨부된 예시도면을 참조로 상세히 설명한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명에 따른 연료전지 차량의 연료전지 스택 제작 방법의 순서도를 도시한 것인 바, 본 발명의 연료 전지 스택 제조는 설계된 연료전지 스택 용량 에 맞추어 단위 셀을 수십에서 수백장까지 적층 한 상태에서 체결기구를 통한 체결 전 기밀평가를 수행하게 된다.1 is a flowchart illustrating a method of manufacturing a fuel cell stack of a fuel cell vehicle according to the present invention. In the fuel cell stack fabrication according to the present invention, a unit cell is stacked from tens to hundreds of sheets according to a designed fuel cell stack capacity. Will conduct a confidentiality assessment prior to tightening with the clamping mechanism.

즉, 설계 용량에 맞추어 서로 적층된 단위 셀로 이루어진 연료전지 스택에 대해 설정된 압력(P, 이는 설계 시 요구된 압력임)보다 낮은 압력(Pa)을 가한 후, 상기 압력(Pa)하에서 연료전지 스택의 기밀성이 양호 상태인가를 검사하게 된다.That is, after applying a pressure (Pa) lower than the pressure (P, which is the pressure required in the design) set for the fuel cell stack composed of unit cells stacked on each other according to the design capacity, the pressure of the fuel cell stack under the pressure (Pa) It is checked whether the airtightness is in good condition.

이때, 상기 연료전지 스택의 기밀성이 불량한 경우에는 단위셀을 다시 적층하는 반면, 기밀성이 양호하면 설정 압력(P)을 연료전지 스택에 가해주게 된다.In this case, when the airtightness of the fuel cell stack is poor, the unit cells are stacked again, whereas when the airtightness is good, the set pressure P is applied to the fuel cell stack.

이어, 설정된 압력(P)을 받는 연료전지 스택으로 정상적인 작동 여부를 위해 일정량의 수소와 공기를 공급함과 더불어, 상기 연료전지 스택으로 AC 전압을 외부에서 가해 상기 스택의 내부 저항(Impedance, mOhm)이 어느 정도 값을 갖는지 측정한다.Subsequently, a predetermined amount of hydrogen and air are supplied to the fuel cell stack subjected to the set pressure P, and an AC voltage is applied to the fuel cell stack from the outside to increase the internal resistance (mOhm) of the stack. Measure to what extent.

이때, 상기 AC 전압은 100Hz - 2KHz 주파수를 갖는 범위인데, 이와 같은 주파수 범위의 선택은 연료전지 스택의 용량이나 필요에 따라 상기 주파수 영역 내에서 조절하게 됨은 물론이다.At this time, the AC voltage is a range having a frequency of 100Hz-2KHz, the selection of such a frequency range is of course to be adjusted in the frequency range according to the capacity or need of the fuel cell stack.

이후, 상기 연료전지 스택에서 측정된 내부 저항이 목표 값인지 여부를 확인한 후 만약, 측정된 내부 저항이 목표 값에 미치지 못하는 경우에는 연료전지 스택에 가하는 압력을 점진적으로 증가하면서 내부 저항이 목표 값에 도달하는지 여부를 측정하게 된다.Then, after checking whether the internal resistance measured in the fuel cell stack is a target value, if the measured internal resistance does not reach the target value, the internal resistance is gradually increased to the target value while gradually increasing the pressure applied to the fuel cell stack. It will measure whether it arrives.

이어, 상기 연료전지 스택에서 측정된 내부 저항이 목표 값에 도달하게 되면, 상기 연료전지 스택을 외부에서 체결기구(이는 통상적으로 사용된 것과 동일 함)를 이용하여 체결하여 완성하게 된다.Subsequently, when the internal resistance measured by the fuel cell stack reaches a target value, the fuel cell stack is completed by fastening the fuel cell stack from the outside using a fastening mechanism (which is the same as commonly used).

이상 설명한 바와 같이 본 발명에 의하면, 연료전지 스택의 체결압을 내부저항을 통해 결정하므로 항상 일정한 체결압을 갖으면서도 체결전 내부 기밀을 검사하므로 보다 신뢰성 있고 균일한 성능을 가지는 연료전지 스택을 제작할 수 있는 효과가 있게 된다.As described above, according to the present invention, since the fastening pressure of the fuel cell stack is determined through the internal resistance, the internal airtightness is inspected before the fastening while having a constant fastening pressure at all times, so that a fuel cell stack having more reliable and uniform performance can be manufactured. It is effective.

Claims (4)

설계 용량에 맞추어 서로 적층된 단위 셀로 이루어진 연료전지 스택에 일정한 압력(Pa)을 가해 연료전지 스택의 기밀성을 측정하는 기밀측정단계;A gas tightness measuring step of measuring airtightness of the fuel cell stack by applying a constant pressure Pa to a fuel cell stack including unit cells stacked on each other according to a design capacity; 상기 기밀측정단계 후 연료전지 스택의 기밀성이 양호하면 설정 압력(P)을 연료전지 스택에 가하면서 일정량의 수소와 공기를 공급하는 정상작동측정단계;A normal operation measuring step of supplying a predetermined amount of hydrogen and air while applying a set pressure (P) to the fuel cell stack if the airtightness of the fuel cell stack is good after the airtight measuring step; 상기 정상작동측정단계에서 연료전지 스택으로 AC 전압을 외부에서 가해 상기 스택의 내부 저항값이 목표값에 도달하는 지 측정하는 체결압결정단계;A clamping pressure determining step of measuring whether the internal resistance of the stack reaches a target value by applying an AC voltage to the fuel cell stack from the outside in the normal operation measuring step; 상기 체결압결정단계에서 연료전지 스택의 내부 저항이 목표 값이 되면 연료전지 스택을 외부에서 체결기구를 이용해 체결하는 스택제결완료단계;A stack completion step of fastening the fuel cell stack using a fastening mechanism from the outside when the internal resistance of the fuel cell stack reaches a target value in the fastening pressure determination step; 로 이루어지는 연료전지 차량의 연료전지 스택 제작 방법.A fuel cell stack manufacturing method for a fuel cell vehicle. 제 1항에 있어서, 상기 기밀측정단계에서 연료전지스택에 가해지는 압력(Pa)은 설계 시 설정된 압력(P)보다 낮은 압력인 것을 특징으로 하는 연료전지 차량의 연료전지 스택 제작 방법.The method of claim 1, wherein the pressure Pa applied to the fuel cell stack in the airtight measurement step is a pressure lower than the pressure P set at the time of design. 제 1항에 있어서, 상기 체결압결정단계에서 AC 전압은 100Hz - 2KHz 주파수인 것을 특징으로 하는 연료전지 차량의 연료전지 스택 제작 방법.The method of claim 1, wherein the AC voltage in the fastening pressure determination step is a frequency of 100Hz-2KHz. 제 1항에 있어서, 상기 체결압결정단계에서 연료전지 스택에서 측정된 내부 저항이 목표 값에 미치지 못하는 경우, 상기 연료전지 스택에 가하는 압력을 점진적으로 증가하면서 내부 저항이 목표 값에 도달하는지 여부를 측정하는 것을 특징으로 하는 연료전지 차량의 연료전지 스택 제작 방법.The method of claim 1, wherein when the internal resistance measured in the fuel cell stack does not reach a target value in the fastening pressure determination step, it is determined whether the internal resistance reaches the target value while gradually increasing the pressure applied to the fuel cell stack. A method for manufacturing a fuel cell stack of a fuel cell vehicle, characterized in that the measurement.
KR1020050050690A 2005-06-14 2005-06-14 Fuel cell stack construction method in fuel cell car KR20060130950A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100837904B1 (en) * 2007-05-25 2008-06-13 현대자동차주식회사 Apparatus and method for automatic assembling of fuel cell stacks for automobile
KR100969065B1 (en) * 2008-04-28 2010-07-09 현대자동차주식회사 Device and method for testing airtightness of fuel cell stack
CN110649305A (en) * 2019-09-20 2020-01-03 河北清清电池有限公司 Method and apparatus for fuel cell stack assembly
CN114894359A (en) * 2022-03-31 2022-08-12 东风汽车集团股份有限公司 Fuel cell stack fastening force detection method and device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100837904B1 (en) * 2007-05-25 2008-06-13 현대자동차주식회사 Apparatus and method for automatic assembling of fuel cell stacks for automobile
KR100969065B1 (en) * 2008-04-28 2010-07-09 현대자동차주식회사 Device and method for testing airtightness of fuel cell stack
CN110649305A (en) * 2019-09-20 2020-01-03 河北清清电池有限公司 Method and apparatus for fuel cell stack assembly
CN114894359A (en) * 2022-03-31 2022-08-12 东风汽车集团股份有限公司 Fuel cell stack fastening force detection method and device
CN114894359B (en) * 2022-03-31 2023-08-15 东风汽车集团股份有限公司 Method and device for detecting fastening force of fuel cell stack

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