Method to detect a hydrogen leak in a fuel cell
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G01F-017/00
G01F-023/00
출원번호
US-0669492
(2007-01-31)
등록번호
US-7343251
(2008-03-11)
발명자
/ 주소
Farnsworth,Jared M.
Ward,Justin David
Spare,Bradley Landon
출원인 / 주소
Toyota Motor Engineering & Manufacturing North America, Inc.
대리인 / 주소
Gifford, Krass, Sprinkle, Anderson & Citkowski, P.C.
인용정보
피인용 횟수 :
1인용 특허 :
9
초록▼
In one aspect, there is disclosed a method of detecting a hydrogen leak in a fuel cell system, including the steps of (a) calculating a mass of hydrogen in a fuel tank, HT new, at a time step, (b) calculating a mass of the hydrogen consumed by the fuel cell at the time step, HFcp new, (c) calculatin
In one aspect, there is disclosed a method of detecting a hydrogen leak in a fuel cell system, including the steps of (a) calculating a mass of hydrogen in a fuel tank, HT new, at a time step, (b) calculating a mass of the hydrogen consumed by the fuel cell at the time step, HFcp new, (c) calculating a total amount of hydrogen that has left the tank from a start to the time step, HTcons, (d) calculating a total amount of hydrogen consumption, HFcpcons, (e) calculating a difference between HTcons and HFcpcons at the time-step, (f) determining if the difference is above a predetermined threshold, and (g) performing an action based on the determination of step (f).
대표청구항▼
The invention claimed is: 1. A method of detecting a hydrogen leak in a hydrogen fuel cell system comprising the steps of: a) calculating a mass, HTnew of hydrogen in a fuel tank at a time step; b) calculating a mass, HFcpnew of the hydrogen consumed by the fuel cell at the time step; c) calculatin
The invention claimed is: 1. A method of detecting a hydrogen leak in a hydrogen fuel cell system comprising the steps of: a) calculating a mass, HTnew of hydrogen in a fuel tank at a time step; b) calculating a mass, HFcpnew of the hydrogen consumed by the fuel cell at the time step; c) calculating a total amount of hydrogen that has left the tank from a start to the time step, HTcons; d) calculating a total amount of hydrogen consumption, HFcpcons; e) calculating a difference between HTcons and HFcpcons at the time step; f) determining if the difference is above a predetermined threshold; g) performing an action based on the determination of step f) wherein the action includes generating an error signal indicating a hydrogen leak, shutting down the fuel cell system, or indicating a hydrogen leak is occurring when the difference is above the predetermined threshold and repeating steps a) through f) when the difference is below the predetermined threshold. 2. The method of claim 1 wherein HTnew is calculated according to the formula: HTnew=(Ptank*Vtank((z*R*Ttank))*0.00202 wherein Ptank is a tank pressure, Vtank is a tank volume, Ttank is a tank temperature, z is a compressibility factor, and R is a gas constant. 3. The method of claim 1 wherein HFcpnew equals the sum of a faraday consumption and an amount of hydrogen purged at the time step. 4. The method of claim 3 wherein the faraday consumption is calculated according to the formula: Faraday consumption=((FC current*400)/(2*96485))*0.00202 wherein FC current is the current produced by the fuel cell. 5. The method of claim 3 wherein the amount of hydrogen purged is calculated according to the formula: Mpurge=number of purges*Msingle purge wherein M single purge is the mass of fuel exhausted in a single purge. 6. The method of claim 5 wherein Msingle purge is assigned a predetermined value. 7. The method of claim 1 wherein HTcons is calculated according to the formula: description="In-line Formulae" end="lead"HTcons=(HTold-HTnew)+HTcons olddescription="In-line Formulae" end="tail" wherein HTold is the mass of hydrogen in the fuel tank at a previous time step and HT cons old is the total amount of hydrogen that has left the tank from the previous time step. 8. The method of claim 1 wherein HFcpcons is calculated according to the formula: HFcpcons=(HFcp old+HFcp new)/2*(time duration step)+HFcp cons old wherein Hfcp old equals the sum of a faraday consumption and an amount of hydrogen purged at a previous time step, time duration step equals a numerical count of the number of time steps, and HFcp cons old equals the total amount of hydrogen consumption at the previous time step. 9. The method of claim 1 wherein in the determination step f) the difference exceeds the predetermined threshold and the action of step g) includes shutting down the hydrogen fuel cell system. 10. The method of claim 1 wherein in the determination step f) the difference does not exceed the predetermined amount and the action of step g) includes repeating steps a) through g). 11. The method of claim 10 wherein the mass of hydrogen previously calculated in step a) is set as HTold representing the mass of hydrogen in a fuel tank at the previous time step. 12. The method of claim 10 wherein the mass of hydrogen previously calculated in step b) is set as HFcp old representing the mass of hydrogen consumed by the fuel cell at the previous time step. 13. The method of claim 1 including the step of initializing mass variables at a start up of the fuel cell. 14. A method of detecting a hydrogen leak in a hydrogen fuel cell system comprising the steps of: a) calculating a mass, HTnew of hydrogen in a fuel tank at a time step according to the formula: HTnew=(Ptank*Vtank/(z*R*Ttank))*0.00202 wherein Ptank is a tank pressure, Vtank is a tank volume, Ttank is a tank temperature, z is a compressibility factor, and R is a gas constant; b) calculating a mass, HFcpnew of the hydrogen consumed by the fuel cell at the time step as the sum of a faraday consumption and an amount of hydrogen purged at the time step according to the formula: Faraday consumption=((FC current*400)/(2*96485))*0.00202 wherein FC current is the current produced by the fuel cell and Mpurge=number of purges*Msingle purge wherein M single purge is the mass of fuel exhausted in a single purge; c) calculating a total amount of hydrogen that has left the tank from a start to the time step, HTcons; d) calculating a total amount of hydrogen consumption, HFcpcons; e) calculating a difference between HTcons and HFcpcons at the time step; f) determining if the difference is above a predetermined threshold; g) performing an action based on the determination of step f) wherein the action includes generating an error signal indicating a hydrogen leak, shutting down the fuel cell system, or indicating a hydrogen leak is occurring when the difference is above the predetermined threshold and repeating steps a) through f) when the difference is below the predetermined threshold.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (9)
Twerdochlib Michael (Oviedo FL), Apparatus for monitoring hydrogen gas leakage into the stator coil water cooling system of a hydrogen cooled electric ge.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.