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1. 发明专利

JPS62229766A FUEL CELL 失效
公开(公告)号：JPS62229766A
公开(公告)日：1987-10-08
申请号：JP7284886
申请日：1986-03-31
申请人： TOSHIBA CORP
发明人： SEKI TOSHIAKI , TSUSHIMA MASAMITSU , IYASU KIYOTARO
IPC分类号： F28F21/02 , H01M8/02
摘要： PURPOSE:To increase cooling performance and efficiency by forming a cooling plate by stacking the first and second plates mainly comprising graphite with a conductive adhesive. CONSTITUTION:Graphite particles are molded by using pitch as a binder, and the pitch is graphitized at 2000 deg.C, and resin is impregnated under vacuum to obtain an impermeable graphite plate. Cooling pipe embedding grooves 33 are formed in an impermeable graphite 31 measuring 600 X 700mm. A cooling pipe 32 is embedded in the grooves 33 by applying pressure at 160 deg.C with expansion graphite 34 to form the first plate. An impermeable graphite plate 36 measuring 600X 700mm is bonded on the embedded surface 35 of the first plate as the second plate with a carbon-phenol resin conductive adhesive 37 to form a cooling plate. Thereby, heat conductivity and eelctric conductivity of the cooling plate are increased, and cooling performance and efficiency are improved.

2. 发明专利

JPS6266577A FUEL CELL 失效
公开(公告)号：JPS6266577A
公开(公告)日：1987-03-26
申请号：JP20532185
申请日：1985-09-19
申请人： TOSHIBA CORP
发明人： NARA HIDEYUKI , IYASU KIYOTARO
IPC分类号： H01M8/02
摘要： PURPOSE:To prevent gas leakage from the end of each electrode by forming grooves in the periphery parallel to passages of fluid fuel and fluid oxidizing agent of ribbed electrode, and blocking with a specified fine powder, then filling a specified kneaded material as a sealant. CONSTITUTION:A small amount of fine heat resistant and electrolyte resistant powder 7 is uniformly placed in a groove 6 at the end of ribbed electrode 2, and water is poured in the groove 6, then the fine powder 7 is penetrated inside the bottom 8 of the groove 6 by reducing pressure to block pores in the bottom 8. A mixture 9 obtained by kneading 30-60wt% flake graphite which is heat resistant and electrolyte resistant and 70-40wt% fluorine oil is filled into the groove 6 to seal the end of ribbed electrode. Thereby, gas leakage is surely prevented and the life is lengthened.

3. 发明专利

JPS61267270A MANUFACTURE OF FUEL CELL 失效
公开(公告)号：JPS61267270A
公开(公告)日：1986-11-26
申请号：JP10830585
申请日：1985-05-22
申请人： TOSHIBA CORP
发明人： NARA HIDEYUKI , IYASU KIYOTARO , UMIGA NOBUYOSHI
IPC分类号： H01M8/02
摘要： PURPOSE:To greatly enhance the reliability of a hermetic seal at the end portion of a ribbed electrode, by cutting the contact surface of the end portion of the ribbed electrode on a matrix of a thermoplastic film to expose the basic material of the electrode. CONSTITUTION:The end portion of the side of a ribbed electrode 2, on which grooves 21 are not provided, is cut by a cutting tool 6. It is preferable that the depth of the cutting increases inwards from the end of the side of the electrode 2. A thermoplastic film 4 is cut off by the cutting so that the basic material 5 of the electrode 2 is exposed. The film 4 is cut off to such an extent that the luster of the film is lost and carbon fibers constituting the basic material 5 of the electrode 2 appear with ruggedness. As a result, the quantity of leak is much reduced.

4. 发明专利

JPS62165867A FUEL CELL 失效
公开(公告)号：JPS62165867A
公开(公告)日：1987-07-22
申请号：JP620386
申请日：1986-01-17
申请人： TOSHIBA CORP
发明人： NARA HIDEYUKI , IYASU KIYOTARO
IPC分类号： H01M8/02
摘要： PURPOSE:To prevent the leakage of the gas accurately so as to elongate the life time of a fuel cell by filling a mixed and kneaded material composed of two kinds of fluorocarbon resin powder, silicon carbide fine powder and fluorocarbon oil into the porous portion in the bottom of a groove provided on the end portion of an electrode after closing the said porous portion with silicon carbide fine powder. CONSTITUTION:The porous portion in the bottom 8 of a groove 6 provided on the end portion of an electrode 2 with ribs is closed by infiltrating powder of heat-resistant and electrolyte-resistant material, and then the sealing of the said end portion is performed completely by filling a mixed and kneaded material 9 composed of fluorocarbon resin, silicon carbide fine powder and fluorocarbon oil into all over the groove. In this case, the heat-resistant and electrolyte-resistant powder of 0.2-5mum in grain diameter are adequate for closing material of the porous portion in the groove bottom 8, and fluorocarbon resin of fibrous powder, fluorocarbon resin of granular powder and silicon carbide fine powder are favorable for additional materials to the mixed and kneaded material 9 filling the whole groove so as to prevent the leakage of the gas from the end portion, and it is desirable to use the fluorocarbon oil of the boiling point as high as possible.

5. 发明专利

JPS6243073A FUEL CELL 失效
公开(公告)号：JPS6243073A
公开(公告)日：1987-02-25
申请号：JP18093385
申请日：1985-08-20
申请人： TOSHIBA CORP
发明人： NARA HIDEYUKI , IYASU KIYOTARO
IPC分类号： H01M8/02
摘要： PURPOSE:To increase sealing ability by sealing the end of a ribbed electrode with a fluorine resin film, and arranging a sealing material comprising a kneaded mixture of graphite powder and fluorine oil between the end of electrode and a gas separating plate. CONSTITUTION:A set of ribbed electrodes 2 which has grooves perpendicularly intersecting each other are arranged on each side of a matrix impregnated with phosphoric acid to form a unit cell. A plurality of unit cells are stacked with gas separating plates 3 interposed to form a fuel cell. The end of the electrode 2 is sealed with a fluorine resin film 4. A kneaded mixture of 30-60wt% graphite powder and 70-40wt% fluorine oil is arranged between the end of electrode 2 and the gas separating plate 3 as a sealing material 6. Thereby, the elasticity and adhesive ability between the electrode 2 and the gas separating plate 3 are improved. Therefore, gas leakage is surely prevented to lengthen the life of fuel cell.

6. 发明专利

JPS61227369A FUEL CELL 失效
公开(公告)号：JPS61227369A
公开(公告)日：1986-10-09
申请号：JP6702385
申请日：1985-03-30
申请人： TOSHIBA CORP
发明人： NARA HIDEYUKI , IYASU KIYOTARO , UMIGA NOBUYOSHI
IPC分类号： H01M8/02
摘要： PURPOSE:To reliably prevent gas leakage so as to increase the life of a fuel cell by improving the elasticity and the contact between the end section of the rib electrode and the gas-separating plate by interposing between them a layer of kneaded sealing material containing a thermoresistant electrolyte-resistant fluorine resin powder. CONSTITUTION:A layer of a kneaded sealing material 6 composed of 40-60wt% a thermoresistant electrolyte-resistant fluorine resin powder, 60-40wt% fluorine oil and 1.5-4wt% a silicon carbide powder is interposed between the end section of a rib electrode 2 and a gas-separating plate 3. It is formed according to the following procedure during assembly of a fuel cell. After a fluorine resin film 4 is stuck to the end section of each rib electrode 2 having a matrix, the kneaded sealing material 6 is extruded upon the film 4 and then is rolled using a small roller. After that, a gas-separating plate 3 is placed over the material 6 and then a downward pressure is applied to the plate 3 to bring the rib electrode 2 and the plate 3 into close contact with each other. Due to the sealing material layer, the elasticity and the contact between the rib electrode 2 and the gas-separating plate 3 are improved and therefore no gas leaks from between the electrode 2 and the plate 3 even after repeated cycles of heating and cooling. Consequently, it is possible to produce a fuel cell with a remarkably long life.

7. 发明专利

JPS61147461A MANUFACTURE OF FUEL CELL 失效
公开(公告)号：JPS61147461A
公开(公告)日：1986-07-05
申请号：JP26716684
申请日：1984-12-18
申请人： TOSHIBA CORP
发明人： IYASU KIYOTARO , UMIGA NOBUYOSHI , TSUSHIMA MASAMITSU
IPC分类号： H01M8/02
摘要： PURPOSE:To improve the reliability of sealing by sealing the end portion of an electrode with ribs by means of the suspension of thermoplastic resin and a film. CONSTITUTION:After the suspension of thermoplastic resin is previously impregnated into the end portion of an orthogonal direction against a groove direction of an electrode 2 with ribs in a fuel cell, namely, into the sealing portion 5 due to a suspension, the film 4 of the thermoplastic resin is attached to the end portion parallel to the groove direction, and this is heated and pressed to make integration, and an edge seal portion is adapted to be constituted. And as a suspension of the thermoplastic resin, the suspension in which the thermoplastic resin of fluororesin series, for example, such as PTFE, PFA and FEP etc. having a heat resisting property and a phosphoric acid resisting property is suspended into a solvent such as pure water or Freon etc. is used. Further, if the thermoplastic resin film 4 has the heat resisting property and the phosphoric acid resisting property, it is good, and preferably, a fluorine series resin film such as PFA and FEP etc. is used.

8. 发明专利

JPS62262375A FUEL CELL 失效
公开(公告)号：JPS62262375A
公开(公告)日：1987-11-14
申请号：JP10480886
申请日：1986-05-09
申请人： TOSHIBA CORP
发明人： TSUSHIMA MASAMITSU , IYASU KIYOTARO , SEKI TOSHIAKI
IPC分类号： H01M8/02
摘要： PURPOSE:To realize a complete gas sealing around the ends of a cell with rib, by arranging a fluorine resin type films at the ends parallel to the circulation grooves of the cell, the angles of whose both end openings are depressed, filling the same sort of films at the recesses of the cell, heating and melting them, and then pressing them to squeeze in the small holes of the electrode with rib. CONSTITUTION:The angles of both end openings of the grooves of an electrode 2 with rib are depressed, and fluorine resin type films 4 are placed to cover the both ends parallel to the grooves. Then the electrode 2 is placed in a metal mould with a plain surface, and the mould is heated to melt the films. After that, film pieces 4a of the same material as the coverage films are inserted to recesses 10 furnished at the corners, and, together with the coverage films 4, melted at a time. An L-shape plate is loaded over the films 4 and the film pieces 4a, and the plate is pressed to squeeze the melted films and film piece in the small holes of the electrode with rib, cooled and solidified, and then, the electrode is picked up from the metal mould, and the projections of the film pieces 4a inserted to the recesses 10 are cut off at the same surfaces as the both end opening surfaces of the grooves.

9. 发明专利

JPS6210869A FUEL CELL 失效
公开(公告)号：JPS6210869A
公开(公告)日：1987-01-19
申请号：JP14834585
申请日：1985-07-08
申请人： TOSHIBA CORP
发明人： IYASU KIYOTARO , NARA HIDEYUKI
IPC分类号： H01M8/02
摘要： PURPOSE:To increase airtightness by increasing the amount of thermoplastic resin film heat-inserted in the periphery of the end of electrode with rib on the matrix side than that on the groove side. CONSTITUTION:A thermoplastic film 4 is heat-inserted into the end 2a of an electrode 2 with rib. For example, in a U-shaped film having different width in the upper and lower parts, the narrow width is arranged on groove side and wide width is arranged on matrix side, and the part of film 4 is heated above the melting point of the film to melt it, and pressed from the upper and lower directions. The warp caused by the thermoplastic resin film is eliminated and airtightness is increased.

10. 发明专利

JPS61253767A MANUFACTURE OF FUEL CELL 失效
公开(公告)号：JPS61253767A
公开(公告)日：1986-11-11
申请号：JP9431685
申请日：1985-05-01
申请人： TOSHIBA CORP
发明人： IYASU KIYOTARO , UMIGA NOBUYOSHI , NARA HIDEYUKI
IPC分类号： H01M8/02
摘要： PURPOSE:To reliably prevent gas leakage so as to improve the reliability of a fuel cell by heating the matrix-side portion of a thermoplastic film installed in the end portion of a ribbed electrode to make a ribbed electrode base protrude under the lower surface of the matrix thereby making the protruding electrode base have an anchor effect on the matrix. CONSTITUTION:A part of a thermoplastic film 4 which has been pressed into the material of a ribbed electrode 2 in contact with a matrix 1 is molten by heating to make the layer gradually move down toward the inner area of the ribbed electrode 2 due to reduced viscosity of the layer and its own weight. The downward movement of the layer causes an electrode base 5 to protrude above the upper surface of the layer. Since the electrode base 5 which is made of carbon fiber and is in good contact with the matrix 1 due to hydrophilic property protrudes under the lower surface of the matrix 1, the electrode base 5 has an anchor effect on the matrix 1. Due to the above structure, it is possible to reliably prevent gas leakage through the upper area of the film 4.

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