Polymer electrolyte fuel cell stack and operating method thereof
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H01M-008/04
H01M-008/10
H01M-008/24
출원번호
US-0469878
(2002-03-05)
등록번호
US-7459231
(2008-12-02)
우선권정보
JP-2001-061499(2001-03-06)
국제출원번호
PCT/JP02/002011
(2002-03-05)
§371/§102 date
20040405
(20040405)
국제공개번호
WO02/071525
(2002-09-12)
발명자
/ 주소
Wariishi,Yoshinori
Enjoji,Naoyuki
Kikuchi,Hideaki
Sugita,Narutoshi
Suzuki,Masaharu
Sugiura,Seiji
출원인 / 주소
Honda Giken Kogyo Kabushiki Kaisha
대리인 / 주소
Lahive &
인용정보
피인용 횟수 :
1인용 특허 :
8
초록▼
A fuel cell stack (10) includes a first sub-stack (12), a second sub-stack (14), and a third sub-stack (16) disposed in the flow direction of an oxidizing gas. An intermediate plate (18a) is interposed between the first and second sub-stacks (12, 14), and an intermediate plate (18b) is interposed be
A fuel cell stack (10) includes a first sub-stack (12), a second sub-stack (14), and a third sub-stack (16) disposed in the flow direction of an oxidizing gas. An intermediate plate (18a) is interposed between the first and second sub-stacks (12, 14), and an intermediate plate (18b) is interposed between the second and third sub-stacks (14, 16). In this fuel stack (10), the flow of an oxidizing gas is set such that the oxidizing gas flows in series in the direction from the first sub-stack (12) to the third sub-stack (16). Between the sub-stacks additional oxidizing gas supplies (70,74) are provided through which oxidizing gas of lower humidity than the humidity of the oxidizing gas entering the first sub-stack is supplied. This arrangement allows an efficient management of the humidity water content of the oxidizing gas with sufficient moisturizing of the solid polymer membrane whilst avoiding excessive condensation of water vapour within the stack.
대표청구항▼
The invention claimed is: 1. A solid polymer electrolyte fuel cell stack comprising: a plurality of separators; a plurality of unit cells separated from each other by one of said plurality of separators, said unit cells each having a unified body including an anode, a cathode, and a solid polymer e
The invention claimed is: 1. A solid polymer electrolyte fuel cell stack comprising: a plurality of separators; a plurality of unit cells separated from each other by one of said plurality of separators, said unit cells each having a unified body including an anode, a cathode, and a solid polymer electrolyte membrane disposed between said anode and said cathode, wherein a supply passage and a discharge passage for supplying and discharging, respectively, at least one of a fuel gas and an oxidizing gas as reaction gases are formed in each of said unit cells and said plurality of separators; a first sub-stack having a selected number of said unit cells, said first sub-stack being disposed on an upstream side of a flow of said reaction gas; a second sub-stack having a selected number of said unit cells, said second sub-stack being disposed on a downstream side of the flow of said reaction gas; an intermediate plate provided between the first sub-stack and the second sub-stack, wherein the intermediate plate comprises: a plurality of passages provided along a first edge portion, at least two of the plurality of passages being connected by a connection path, and a plurality of passages provided along a second opposed edge portion, at least two of the plurality of passages being connected by a connection path; wherein said discharge passage in said first sub-stack communicates in series with said supply passage in said second sub-stack to supply an entire amount of the reaction gas discharged from the first sub-stack to the second sub-stack, and an additional reaction gas supply passage for supplying a reaction gas having a humidity lower than said reaction gas supplied to said first sub-stack is provided in said second sub-stack independently from said supply passage, wherein said reaction gas supplied to said first sub-stack is pre-humidified. 2. A solid polymer electrolyte fuel cell stack according to claim 1, wherein the intermediate plate is disposed at a portion at which said discharge passage in said first sub-stack is connected to said supply passage in said second sub-stack, and said intermediate plate has a communication portion for communicating said additional reaction gas supply passage to said supply passage in said second sub-stack. 3. A solid polymer electrolyte fuel cell stack according to claim 1, wherein each of said unit cells constituting said second sub-stack has a mixing portion in which said additional reaction gas supply passage is communicated to said supply passage in said second sub-stack, said mixing portion being adapted to mix the residue of said reaction gas having been used for reaction with said low humidity reaction gas and to supply the mixture to said unified body of each of said unit cells constituting said second sub-stack. 4. A solid polymer electrolyte fuel cell stack according to claim 1, wherein said reaction gas is an oxidizing gas, and the number of said unit cells constituting said second sub-stack is larger than the number of said unit cells constituting said first sub-stack. 5. A solid polymer electrolyte fuel cell stack according to claim 1, wherein the intermediate plate comprises: a plurality of oxidizing gas supply passages and a low humidity oxidizing gas supply passage along the first edge portion, and a coolant supply passage, a coolant discharge passage, a low humidity fuel gas supply passage and a plurality of fuel gas supply passages along the second edge portion. 6. A solid polymer electrolyte fuel cell stack according to claim 5, wherein: one of the plurality of oxidizing gas supply passages of the intermediate plate is in communication with the low humidity oxidizing gas supply passage of the intermediate plate. 7. A solid polymer electrolyte fuel cell stack according to claim 6, wherein the one of the plurality of oxidizing gas supply passages of the intermediate plate is in communication with an oxidizing gas discharge passage of the first sub-stack and an oxidizing gas supply passage of the second sub-stack. 8. A solid polymer electrolyte fuel cell stack according to claim 5, wherein: one of the plurality of fuel gas supply passages of the intermediate plate is in communication with the low humidity fuel gas supply passage of the intermediate plate. 9. A solid polymer electrolyte fuel cell stack according to claim 8, wherein the one of the plurality of fuel gas supply passages of the intermediate plate is in communication with an fuel gas supply passage of the first sub-stack.
Chow Clarence Y. F.,CAX ; Chan John Ka Ki,CAX ; Corless Adrian James,CAX, Method and apparatus for distributing water to an ion-exchange membrane in a fuel cell.
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