Abstract:
본 발명은 연료전지 스택의 아이스 블로킹 감지 방법에 관한 것으로서, 연료전지 스택의 최소 셀전압을 분석하여 전극면의 아이스 블로킹 발생을 실시간으로 감지하는 동시에 특히 애노드의 아이스 블로킹을 캐소드의 아이스 블로킹과 구분하여 판별할 수 있는 방법을 제공하는데 그 목적이 있다. 상기한 목적을 달성하기 위해, 연료전지 스택에 반응가스가 공급되는 상태에서 셀전압 모니터링 장치의 셀전압 측정치로부터 연료전지 스택의 최소 셀전압을 주기적으로 산출하는 단계와; 산출된 최소 셀전압의 현재값과 최소 셀전압의 이전값을 이용하여 최소 셀전압의 변화치를 산출하는 단계와; 상기 최소 셀전압의 변화치가 설정된 기준치 이상인지를 판정하는 단계와; 상기 최소 셀전압의 변화치가 기준치 이상이면 연료전지 스택의 애노드에서 아이스 블로킹이 발생한 것으로 판정하는 단계를 포함하는 연료전지 스택의 아이스 블로킹 감지 방법이 개시된다.
Abstract:
PURPOSE: Apparatus and method for cold starting control of fuel cell system are provided to improve a starting property by rapidly increasing the temperature of a fuel cell stack when starting in the state where the fuel cell stack is cooled. CONSTITUTION: A method for cold starting control of a fuel cell system comprises the steps of: determining whether a cold starting condition is satisfied by detecting the temperature of a fuel cell stack if the start-on is required; supplying hydrogen and air to the fuel cell stack if the temperature of the fuel cell stack satisfies a cold starting condition; and supplying the gas in which hydrogen and air to the fuel cell stack to increase the temperature of the fuel cell stack.
Abstract:
PURPOSE: A method and an apparatus for improving cold start of a fuel cell are provided to allow a stack to perform warming-up by minimizing heat discharge by maintaining a stack in an adiabatic state. CONSTITUTION: An apparatus for improving cold start of a fuel cell includes: an enclosure(21) which is installed in order to seal the circumstance of a fuel cell stack(3); a vacuum suction unit(25) which is connected to the enclosure through a suction pipe(22) and allows an inner space to be a vacuum condition for insulation by inhaling the air present between the fuel cell stack and enclosure through the suction pipe; and a normal-pressure valve(26) so that e air flows inside the internal space.
Abstract:
PURPOSE: A separator for a fuel cell is provided to prevent water from interfering an air stream supplied to a gas diffusion layer, and to improve the air spread efficiency to the gas diffusion layer. CONSTITUTION: A separator(20) for a fuel cell comprises the following: lands(32) contacting a gas diffusion layer(16) of the fuel cell; channels(34) to flow hydrogen or air among the lands; plural water discharge units separately formed in between the lands and the channels to easily discharge water through the channels from the gas diffusion layer. The water discharge unit is formed by penetrating plural water discharge holes(40) with a venturi effect in between the lands and the channels.
Abstract:
PURPOSE: A fuel cell hybrid system using a multi-stack structure is provided to prevent unnecessary charging of a charger from a fuel cell by maintaining the voltage of the fuel cell lower than the voltage of a charger super cap. CONSTITUTION: A fuel cell hybrid system using a multi-stack structure comprises a fuel cell(10) as a main power source, and a charger as a sub power source. The fuel cell includes the multi-stack structure with plural stacks(10a,10b) serially connected with each other. An air supply cutoff unit(43) is installed on air supply pipes(41,42) located in the front side of one stack selected from the plural stacks to block an air supply from an air blower(40). A controller is included to control the operation of the air blower and the air supply cutoff unit.
Abstract:
본 발명은 적외선 온도센서를 이용한 타이어 공기압 측정 장치에 관한 것으로, 차량 주행에 따른 타이어 사이드 월의 온도 상승분을 적외선 온도센서를 이용하여 측정하고 이 온도 상승분과 차량 주행거리를 바탕으로 타이어의 공기압을 구함으로써, 그 장착 및 유지보수가 매우 간편할 뿐만 아니라 가격면에서도 매우 저렴하며, 타이어 공기압 측정 신뢰성도 향상시킬 수 있다.
Abstract:
PURPOSE: A hydrogen humidification apparatus for fuel cell stack is provided, to reduce the equipment space and the weight occupied by a humidification apparatus and to lower the manufacturing cost by forming a plurality of micropaths. CONSTITUTION: The hydrogen humidification apparatus humidifies the hydrogen gas supplied to the each unit cell and comprises a separation plate(25) of the each unit cell, and the separation plate(25) comprises a plurality of micropaths which are formed between the cooling water inlet hole(253c) of the cooling water entrance path of the cell assembly of a fuel cell engaged with the cooling water supply port of an end plate and the hydrogen inlet hole(253a) of an hydrogen entrance path. The cooling water passing through the cooling water entrance path via the micropaths(257) is inhaled and sprayed into the hydrogen entrance path.
Abstract:
PURPOSE: Provided is a stack structure of fuel cell which allows hydrogen contained in water formed by chemical reaction or humidification to be recycled and enables the hydrogen to be re-used after humidification. CONSTITUTION: The structure comprises a cell stack(100) having inlet and outlet parts(110,120), a humidifier(21) for humidifying a hydrogen, a blower(22) for providing the humidified hydrogen by the inlet part(110), and feed lines for providing hydrogen and oxygen respectively, wherein the hydrogen feed line(20) has branch line(23) so as to feed a part of unhumidified hydrogen to either side of the outlet of the stack, and the outlet part(120) of the stack has, at other side, a return pipe(24) so as to be connected with the humidifier. The return pipe has a regulator(25) and check valve.