[특허]Gas leak detection device and fuel cell system

Toyota Jidosha Kabushiki Kaisha

검색어에 아래의 연산자를 사용하시면 더 정확한 검색결과를 얻을 수 있습니다.
검색연산자

검색도움말
검색연산자	기능	검색시 예
()	우선순위가 가장 높은 연산자	예1) (나노 (기계 \| machine))
공백	두 개의 검색어(식)을 모두 포함하고 있는 문서 검색	예1) (나노 기계) 예2) 나노 장영실
\|	두 개의 검색어(식) 중 하나 이상 포함하고 있는 문서 검색	예1) (줄기세포 \| 면역) 예2) 줄기세포 \| 장영실
!	NOT 이후에 있는 검색어가 포함된 문서는 제외	예1) (황금 !백금) 예2) !image
*	검색어의 *란에 0개 이상의 임의의 문자가 포함된 문서 검색	예) semi*
""	따옴표 내의 구문과 완전히 일치하는 문서만 검색	예) "Transform and Quantization"

과학기술 지식인프라 ScienceON

연합인증

연합인증 가입 기관의 연구자들은 소속기관의 인증정보(ID와 암호)를 이용해 다른 대학, 연구기관, 서비스 공급자의 다양한 온라인 자원과 연구 데이터를 이용할 수 있습니다.

이는 여행자가 자국에서 발행 받은 여권으로 세계 각국을 자유롭게 여행할 수 있는 것과 같습니다.

연합인증으로 이용이 가능한 서비스는 NTIS, DataON, Edison, Kafe, Webinar 등이 있습니다.

한번의 인증절차만으로 연합인증 가입 서비스에 추가 로그인 없이 이용이 가능합니다.

다만, 연합인증을 위해서는 최초 1회만 인증 절차가 필요합니다. (회원이 아닐 경우 회원 가입이 필요합니다.)

연합인증 절차는 다음과 같습니다.

최초이용시에는
ScienceON에 로그인 → 연합인증 서비스 접속 → 로그인 (본인 확인 또는 회원가입) → 서비스 이용

그 이후에는
ScienceON 로그인 → 연합인증 서비스 접속 → 서비스 이용

연합인증을 활용하시면 KISTI가 제공하는 다양한 서비스를 편리하게 이용하실 수 있습니다.

특허 상세정보

MyON담기

내보내기 페이스북 공유 트위터 공유 카카오톡 공유

Gas leak detection device and fuel cell system

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H01M-008/04 H01M-008/00 G01M-003/00 G01M-003/04
미국특허분류(USC)	429/025; 429/013; 073/040.50R; 073/049.5
출원번호	UP-0597806 (2005-11-28)
등록번호	US-7648787 (2010-02-22)
우선권정보	JP-2004-343259(2004-11-29); JP-2005-327305(2005-11-11)
국제출원번호	PCT/IB2005/003562 (2005-11-28)
§371/§102 date	20061128 (20061128)
국제공개번호	WO06/056878 (2006-06-01)
발명자 / 주소	Suematsu, Keigo Yokoyama, Tatsuaki Umayahara, Kenji Tomosada, Nobuhiro
출원인 / 주소	Toyota Jidosha Kabushiki Kaisha
대리인 / 주소	Oliff & Berridge, PLC
인용정보	피인용 횟수 : 2 인용 특허 : 1

초록
▼

In a fuel cell system (100), the amount of fuel gas supplied through an fuel gas supply passage (24) and the amount of fuel gas consumed by a fuel cell (10) are detected. A difference between the amount of supplied fuel gas and the amount of consumed fuel gas is calculated by subtracting the amount of consumed fuel gas from the amount of supplied fuel gas. The pressure of the fuel gas in a leak detection passage (Cx), the change in the pressure of the detected fuel gas can be detected, and the change in the amount of fuel gas in the gas leak detection passage (Cx) due to the change in the pressure of the fuel gas can thus be detected. The difference is corrected by subtracting the change in the amount of fuel gas in the gas leak detection passage from the difference. When the corrected difference is equal to or greater than a predetermined value, a fuel gas leak is detected in the leak detection passage (Cx).

대표
청구항
▼

The invention claimed is: 1. A gas leak detection device that detects a gas leak in a fuel cell system including a fuel cell; a fuel gas supply source; a supply passage through which fuel gas is supplied from the fuel gas supply source to the fuel cell; a discharge passage through which fuel gas is discharged from the fuel cell; and a purge valve provided in the discharge passage, which adjusts an amount of fuel gas discharged from the fuel cell, the gas leak detection device comprising: a supply-amount detector provided in the supply passage, which detects an amount of supplied fuel gas, wherein the supply passage includes a first passage positioned downstream of the supply-amount detector, the fuel cell includes a second passage through which the fuel gas flows, the discharge passage includes a third passage positioned upstream of the purge valve, the gas leak detection device further comprising: a consumption-amount calculator programmed to calculate an amount of fuel gas consumed by the fuel cell; a pressure detector that detects a pressure of the fuel gas in a gas leak detection passage including the first passage, the second passage, and the third passage; a change-amount calculator that obtains a change in the pressure of the fuel gas using the detected pressure, and is programmed to calculate a change in an amount of fuel gas in the gas leak detection passage due to the change in the pressure of the fuel gas; a difference-amount calculator programmed to calculate a difference between the detected amount of supplied fuel gas and a sum of the amount of consumed fuel gas and the change in the amount of fuel gas in the gas leak detection passage by subtracting the amount of consumed fuel gas and the change in the amount of fuel gas in the gas leak detection passage from the amount of supplied fuel gas; and a fuel-gas leak detector that determines that a fuel gas leak is present in the gas leak detection passage when the difference is equal to or greater than a first predetermined value. 2. The gas leak detection device according to claim 1, wherein the gas leak detection passage includes a circulation passage, one end of which is connected to the supply passage at a position downstream of the supply-amount detector, and the other end of which is connected to the discharge passage, whereby the fuel gas flows to the supply passage from the discharge passage through the circulation passage so that the fuel gas can be reused. 3. The gas leak detection device according to claim 2, wherein the fuel cell system includes a circulation pump provided in the circulation passage, which delivers the fuel gas from the discharge passage to the supply passage, the gas leak detection device includes a correction portion that corrects the amount of supplied fuel gas detected by the supply-amount detector so as to reduce an influence of pulsation generated by the circulation pump, and the difference-amount programmed to calculate the difference by subtracting the amount of consumed fuel gas and the change in the amount of fuel gas in the gas leak detection passage from the corrected amount of supplied fuel gas. 4. The gas leak detection device according to claim 2, wherein the fuel cell system includes a circulation pump provided in the circulation passage, which delivers the fuel gas from the discharge passage to the supply passage, and the supply-amount detector detects the amount of supplied fuel gas when the circulation pump is not in operation. 5. The gas leak detection device according to claim 1, wherein the gas leak detection passage includes a plurality of sections, the pressure detector detects a pressure of the fuel gas in each of the plurality of sections in the gas leak detection passage, the change-amount calculator obtains a change in the detected pressure of the fuel gas in each of the sections; the change-amount calculator obtains the change in the amount of fuel gas in each of the sections due to the change in the pressure of the fuel gas in the corresponding section; and the change-amount calculator programmed to calculate the change in the amount of fuel gas in the gas leak detection passage, by summing the changes in the amounts of fuel gas in all the sections. 6. The gas leak detection device according to claim 1, wherein the fuel cell system includes a pressure-release valve provided in the supply passage, which reduces the pressure of the fuel gas, and the gas leak detection device includes an amount detector that detects the amount of fuel gas, and that is provided in the supply passage such that the pressure-release valve is positioned between the amount detector and the supply-amount detector; and a leak determination permission portion that permits the fuel-gas leak detector to determine whether a fuel gas leak is present, in a case where a difference between the amount of supplied fuel gas detected by the supply-amount detector and the amount of fuel gas detected by the amount detector is in a predetermined range. 7. The gas leak detection device according to claim 6, wherein the fuel-gas leak detector determines that a fuel gas leak is present between the supply-amount detector and the amount detector in the supply passage, when both the amount of supplied fuel gas detected by the supply-amount detector and the amount of fuel gas detected by the amount detector are constant, but the difference between the amounts is not within the predetermined range. 8. The gas leak detection device according to claim 1, wherein the fuel cell system includes a cut-off valve provided in the supply passage at a position upstream of the supply-amount detector, which cuts off supply of the fuel gas when closed, and the fuel-gas leak detector determines that a fuel gas leak is present in the supply passage at a position upstream of the supply-amount detector and downstream of the cut-off valve, in a case where the supply-amount detector detects a greater amount of fuel gas flowing in a direction opposite to a direction where the fuel gas is supplied than a predetermined amount when the supply of the fuel gas is cut off by closing the cut-off valve. 9. The gas leak detection device according to claim 1, wherein the fuel cell system includes a cut-off valve provided in the supply passage at a position upstream of the supply-amount detector, which cuts off supply of the fuel gas when closed, and the fuel-gas leak detector determines that a fuel gas leak is present in the gas leak detection passage, in a case where the supply-amount detector detects a greater amount of fuel gas flowing in a direction where the fuel gas is supplied than a predetermined amount when the cut-off valve is closed and the fuel cell is not generating electric power. 10. The gas leak detection device according to claim 1, further comprising: a first pressure difference detector which detects an upstream pressure in the supply passage at a position upstream of the supply-amount detector and a downstream pressure in the supply passage at a position downstream of the supply-amount detector, and obtains a pressure difference between the upstream pressure and the downstream pressure by subtracting the downstream pressure from the upstream pressure; and a first amount estimation portion which estimates an amount of fuel gas flowing in the supply-amount detector, based on the pressure difference, wherein the fuel-gas leak detector determines that an abnormality is present in the supply-amount detector, in a case where an absolute value of a difference between the amount of fuel gas estimated by the first amount estimation portion and the amount of supplied fuel gas detected by the supply-amount detector is equal to or greater than a second predetermined value. 11. The gas leak detection device according to claim 1, wherein the fuel cell system includes a regulator which is provided in the supply passage at a position upstream or downstream of the supply-amount detector, the gas leak detection device includes a second pressure difference detector which detects an upstream pressure in the supply passage at a position upstream of the regulator and a downstream pressure in the supply passage at a position downstream of the regulator, and obtains a pressure difference between the upstream pressure and the downstream pressure by subtracting the downstream pressure from the upstream pressure; and a second amount estimation portion which estimates an amount of fuel gas flowing in the regulator in the supply passage, based on the pressure difference obtained by the second pressure difference detector, and the fuel-gas leak detector determines that an abnormality is present in the supply-amount detector, in a case where an absolute value of a difference between the amount of fuel gas estimated by the second amount estimation portion and the fuel gas supply amount detected by the supply-amount detector is equal to or greater than a third predetermined value. 12. A fuel cell system comprising: a fuel cell; a fuel gas supply source; a supply passage through which fuel gas is supplied from the fuel gas supply source to the fuel cell; a discharge passage through which fuel gas is discharged from the fuel cell; a purge valve provided in the discharge passage, which adjusts an amount of fuel gas discharged from the fuel cell; and a supply-amount detector provided in the supply passage, which detects a fuel gas supply amount that is an amount of supplied fuel gas, wherein the supply passage includes a first passage downstream of the supply-amount detector in a supply direction in which the fuel gas is supplied from the fuel gas supply source, the fuel cell includes a second passage through which the fuel gas flows, the discharge passage includes a third passage upstream of the purge valve in a discharge direction in which the fuel gas is discharged from the fuel cell, and the fuel cell system further includes a pressure detector that detects a pressure of the fuel gas in a gas leak detection passage including the first passage, the second passage, and the third passage; a consumption-amount calculator programmed to calculate an amount of fuel gas consumed by the fuel cell; a change-amount calculator that obtains a change in the pressure of the fuel gas using the detected pressure, and is programmed to calculate a change in an amount of fuel gas in the gas leak detection passage due to the change in the pressure of the fuel gas; a difference- amount calculator programmed to calculate a difference between the detected amount of supplied fuel gas and a sum of the amount of consumed fuel gas and the change in the amount of fuel gas in the gas leak detection passage by subtracting the amount of consumed fuel gas and the change in the amount of fuel gas in the gas leak detection passage from the detected amount of supplied fuel gas; and a fuel-gas leak detector that determines that a fuel gas leak is present in the gas leak detection passage when the difference is equal to or greater than a predetermined value. 13. A method for detecting a gas leak in a fuel cell system that includes a fuel cell; a fuel gas supply source; a supply passage through which fuel gas is supplied from the fuel gas supply source to the fuel cell; a discharge passage through which fuel gas is discharged from the fuel cell; and a purge valve provided in the discharge passage, which adjusts an amount of fuel gas discharged from the fuel cell; comprising detecting, at a predetermined first position within the supply passage, an amount of supplied fuel gas; calculating an amount of fuel gas consumed by the fuel cell; detecting a pressure of the fuel gas in a gas leak detection passage that includes a first passage downstream of the predetermined first portion in the supply passage; a second passage through which the fuel gas flows in the fuel cell; and a third passage upstream of the purge valve in the discharge passage; obtaining a change in the pressure of the fuel gas using the detected pressure; calculating a change in an amount of fuel gas in the gas leak detection passage due to the change in the pressure of the fuel gas; calculating a difference between the detected amount of supplied fuel gas and a sum of the amount of consumed fuel gas and the change in the amount of fuel gas in the gas leak detection passage by subtracting the amount of consumed fuel gas and the change in the amount of fuel gas in the gas leak detection passage from the detected amount of supplied fuel gas; and determining that a fuel gas leak is present in the gas leak detection passage when the difference is equal to or greater than a predetermined value.

이 특허에 인용된 특허 (1)

Miura, Shimpei; Kurita, Kenji; Yoshida, Naohiro; Umayahara, Kenji. Fluid leakage detection apparatus and fluid leakage detection method. USP2005026851298.

이 특허를 인용한 특허 피인용횟수: 2

IPC 상위 출원인

내보내기

상세정보
내보내기 구분	파일저장 인쇄 메일전송
구성항목	관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표IPC 관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 공고번호, 공고일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표출원인, 출원인국적, 출원인주소, 발명자, 발명자E, 발명자코드, 발명자주소, 발명자 우편번호, 발명자국적, 대표IPC, IPC코드, 요약, 미국특허분류, 대리인주소, 대리인코드, 대리인(한글), 대리인(영문), 국제공개일자, 국제공개번호, 국제출원일자, 국제출원번호, 우선권, 우선권주장일, 우선권국가, 우선권출원번호, 원출원일자, 원출원번호, 지정국, Citing Patents, Cited Patents
저장형식	Text(ASCII format) Excel format PIAS분석(.xls)
메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
안내	> 총 건의 자료가 검색되었습니다. > 다운받으실 자료의 인덱스를 입력하세요. (1-10,000) > 검색결과의 순서대로 최대 10,000건 까지 다운로드가 가능합니다. > 데이타가 많을 경우 속도가 느려질 수 있습니다.(최대 2~3분 소요) > 다운로드 파일은 UTF-8 형태로 저장됩니다. 파일의 내용이 제대로 보이지 않을실 때는 웹브라우저 상단의 보기 -> 인코딩 -> 자동선택 여부를 확인하십시오 > ~ > Text(ASCII format) Excel format

과학기술 지식인프라 ScienceON

ScienceON Chatbot

연합인증

특허 상세정보

Gas leak detection device and fuel cell system

초록
▼

대표
청구항
▼

이 특허에 인용된 특허 (1)

이 특허를 인용한 특허 피인용횟수: 2

IPC 상위 출원인

과제정보

상세정보조회

원문조회

IPC 상세정보(version : 201201)

연구과제 성과물(0)

참여연구원의 다른 문헌(0)

처리중입니다.

잠시만 기다려주세요.

ScienceON Chatbot

연합인증

특허 상세정보

Gas leak detection device and fuel cell system

초록 ▼

대표청구항 ▼

이 특허에 인용된 특허 (1)

이 특허를 인용한 특허 피인용횟수: 2

IPC 상위 출원인

과제정보

상세정보조회

원문조회

IPC 상세정보(version : 201201)

연구과제 성과물(0)

참여연구원의 다른 문헌(0)

처리중입니다.

잠시만 기다려주세요.

초록
▼

대표
청구항
▼