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CN106953108A - A kind of hydrogen-oxygen proton exchange membrane fuel cell sealing structure - Google Patents

A kind of hydrogen-oxygen proton exchange membrane fuel cell sealing structure Download PDF

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Publication number
CN106953108A
CN106953108A CN201710308662.9A CN201710308662A CN106953108A CN 106953108 A CN106953108 A CN 106953108A CN 201710308662 A CN201710308662 A CN 201710308662A CN 106953108 A CN106953108 A CN 106953108A
Authority
CN
China
Prior art keywords
containment member
sealing
fuel cell
hydrogen
sealing structure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710308662.9A
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Chinese (zh)
Inventor
程立明
李明明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiangsu Hydrogen Power New Energy Co Ltd
Original Assignee
Jiangsu Hydrogen Power New Energy Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jiangsu Hydrogen Power New Energy Co Ltd filed Critical Jiangsu Hydrogen Power New Energy Co Ltd
Priority to CN201710308662.9A priority Critical patent/CN106953108A/en
Publication of CN106953108A publication Critical patent/CN106953108A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00Fuel cells; Manufacture thereof
    • H01M8/02Details
    • H01M8/0271Sealing or supporting means around electrodes, matrices or membranes
    • H01M8/0276Sealing means characterised by their form
    • H01M8/0278O-rings
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00Fuel cells; Manufacture thereof
    • H01M8/02Details
    • H01M8/0271Sealing or supporting means around electrodes, matrices or membranes
    • H01M8/0276Sealing means characterised by their form
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00Fuel cells; Manufacture thereof
    • H01M8/02Details
    • H01M8/0271Sealing or supporting means around electrodes, matrices or membranes
    • H01M8/028Sealing means characterised by their material
    • H01M8/0284Organic resins; Organic polymers
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30Hydrogen technology
    • Y02E60/50Fuel cells

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Fuel Cell (AREA)
  • Gasket Seals (AREA)

Abstract

The present invention discloses a kind of hydrogen-oxygen proton exchange membrane fuel cell sealing structure, including the sealing ring being adapted to part edge to be sealed, the sealing ring includes the first containment member and the second containment member, wherein, first containment member is made up of fluorubber material, and the second containment member is made up of silastic material;First containment member is at least wrapped in the outside of second containment member and sealing medium contact surface, and second containment member is isolated with sealing medium.Sealing structure is combined and formed by the first containment member and the second containment member in the present invention, and the second containment member is made up as inner core of silica gel material, provides suitable elasticity and hardness for sealing structure, it is ensured that fuel cell is effectively assembled;First containment member, as outer layer, is that sealing structure undertakes anticorrosive function, is effective against the molecular structure that the external environment conditions such as pure oxygen, strong acid destroy silica gel material, keeps sealing structure to keep original grown form for a long time.

Description

A kind of hydrogen-oxygen proton exchange membrane fuel cell sealing structure
Technical field
The invention belongs to fuel cell manufacture field, one kind sealing hydrogen-oxygen proton exchange membrane fuel electricity is specifically related to The sealing structure in pond.
Background technology
The electric power of fuel cell is to be obtained by hydrogen with the chemical reaction of oxygen, is one as the hydrogen of fuel electricity Colourless, tasteless, inflammable and explosive micro-molecular gas is planted, is also very easy to cause leakage even if the gap of very little, and can be very Wide blend range internal cause sparklet triggers explosive combustion, it requires that fluid sealant allows for providing element cell good gas Body is sealed.
Existing fuel cell sealant selects silica gel material, silica gel alias mostly:Silica gel or silicic acid gel, English Title:Silica gel;Silica, molecular formula:XSiO2yH2O, molecular weight:60.08.Silica gel according to moulding process not Together, it is divided into:Silica gel product is molded, silica gel product is extruded, liquid-state silicon gel product three major types are molded silica gel product typically by height Warm mould applies pressure after the solid silicone raw material of addition vulcanizing agent is put into by vulcanizing board, and high temperature sulphur is molded into solidification , the hardness of silica gel is molded generally at 30 °C -70 °C.Silica gel product is extruded typically by extrusion machine pusher silica gel shaping , hardness is generally at 30 °C -70 °C.Liquid-state silicon gel product is to be molded injection molding by silica gel, and product is soft, and hardness can be with Reach 10 °C -40 °C.Fuel cell sealant silica gel obtains required silica gel product according to different silica gel moulding process, into Cross-section structure is broadly divided into two kinds, two kinds of structures as shown in figure 1, the maximum gauge in section is 1.6 ~ 2mm after type.
However, researcher has been found that silica gel material has certain deficiency when as fuel battery sealing piece. Such as use in relatively broad fuel cell, polymer fuel cell has used the polymeric membrane with ionic conduction(Sun from Proton exchange), cation-exchange membrane is generally using with sulfonic fluororesin.Most commonly Nafion membrane.This polymer Film only has can just become proton conductive after absorbing water, therefore reacting gas is humidified to keep the proton conductive of film.Proton Exchange film fuel battery will be run in 50-100 degree or so, and sulfonic pH value is 1-2, is strong acid environment.Silica gel is used in high score In sub- fuel cell sealant, and it is chronically under strong acid environment state, silica gel material can be decomposed, loses original machinery Intensity, and polymer fuel cell can be made to reveal hydrogen, cause explosive combustion.Hydrogen-oxygen proton exchange membrane fuel cell is a kind of Using pure oxygen as the fuel cell of oxidant, due to using pure oxygen as oxidant, under the conditions of high positive voltage, to the oxygen of material Change corrosion very serious, silica gel can corrode quickly due to there is also former base under the conditions of pure oxygen, finally result in fuel cell leakage Gas.
It can thus be seen that silicon rubber is used for doing the encapsulant of fuel cell, there is gas permeability height, wear no resistance, it is resistance to Acid-base property is poor, the shortcomings of oil resistant solvent-resisting is poor, and in order to solve to overcome above-mentioned defect, researcher considers to replace with fluorubber For encapsulant of the silicon rubber as fuel cell.
Fluorubber(fluororubber)Refer to the synthesis high score bullet containing fluorine atom on the carbon atom of main chain or side chain Property body, its main component is the fluorine material such as PVDF or PTFE.
Fluorubber has the chemical stability of height, is best one kind of medium-resistance, fluorine in current all elastic body The resistance to elevated temperatures of rubber is similarly excellent, and the temperature tolerance of silicon rubber is basically identical, and fluorubber has fabulous resistance to day in addition Time ageing properties, ozone resistance, the strength that fluorubber typically coordinates is between 10 ~ 20MPa, and elongation at break is 150 ~ 350% Between, tearing toughness is between 3 ~ 4KN/m, and fluorubber is to the solubility of gas than larger, but diffusion velocity is smaller, institute Also small with the gas permeability that aggregate performance comes out, fluorubber has high temperature resistant, oil resistant, resistance to high vacuum and acid and alkali-resistance, resistant to many chemistry The characteristics of medicine.
Fluorubber material well solve the drawbacks of silica gel is in polymer fuel cell, but fluorubber material is due to material The reason for material, technique, shore hardness scope assembles what encapsulant was adapted to more than 50 considerably beyond hydrogen-oxygen fuel cell heap Shore hardness, is not suitable as the encapsulant of fuel cell.Therefore, sealing of the fluorubber material in fuel cell how is realized Applied in material, the performance advantage of fluorubber material is played, as the emphasis studied at this stage.
The content of the invention
Goal of the invention:Present invention aims at there is provided a kind of hydrogen-oxygen proton exchange membrane fuel in view of the shortcomings of the prior art Battery sealing structure, both ensure that moderate hardness, meet the assembling demand of fuel cell, again have chemical stability strong Advantage.
Technical scheme:Hydrogen-oxygen proton exchange membrane fuel cell sealing structure of the present invention, including with part side to be sealed The sealing ring of edge adaptation, it is characterised in that the sealing ring includes the first containment member and the second containment member, wherein, first Containment member is made up of fluorubber material, and the second containment member is made up of silastic material;
First containment member is at least wrapped in the outside of second containment member and sealing medium contact surface, by described Two containment members are isolated with sealing medium.
Further preferably technical scheme is the present invention, and first containment member is completely encapsulated in the second sealing structure The outside of part, second containment member is isolated with sealing medium.
The section of the sealing ring is circular, semicircle, rectangle or polymorphic structure.The section shape of sealing ring can be to appoint Meaning shape, as long as ensureing that the first containment member is at least wrapped in the outside of the second containment member and sealing medium contact surface.
As preferred technical scheme, when the section of the sealing ring is circle, second containment member is filled circles Column structure, the first seal is hollow tubular structures, and second containment member is located at the interior of the first seal In chamber, and the bore of first containment member is consistent with the diameter of second containment member.
Preferably, the pipe thickness of first containment member is that 0.5 ~ 0.55mm, pipe external diameter are 1.6 ~ 2mm.
Preferably, when the section of the sealing ring is semicircle, second containment member is flat column or cylindric knot Structure, the first seal is semi-cylindrical in configuration, is provided with the bottom of the first seal and the second containment member shape Consistent cavity, second containment member is located in the cavity of the first seal.
Preferably, the distance of a diameter of 1.6 ~ 2mm of first containment member, cavity wall to outer wall for 0.5 ~ 0.55mm。
Beneficial effect:Sealing structure is combined and formed by the first containment member and the second containment member in the present invention, and second is close Component is sealed as inner core, is made up of silica gel material, suitable elasticity and hardness is provided for sealing structure, it is ensured that fuel cell is effective Assembling;First containment member is at least wrapped in the outside of second containment member and sealing medium contact surface as outer layer, will Second containment member is isolated with sealing medium, is that sealing structure undertakes anticorrosive function, can be exempted silica gel inner core directly sudden and violent Expose outside, be effective against the molecular structure that the external environment conditions such as pure oxygen, strong acid destroy silica gel material, keep sealing structure to keep for a long time Original grown form;The sealing structure of the present invention has good tolerance, such as strong acid and strong base environment, high temperature to use environment The environment such as high cold environment, cold cycling, the anti-leakage to gas is equally very outstanding, and this sealing structure shore hardness can be with addition 30 ~ 50 degree are reached, is adapted to the shore hardness of polymer fuel cell encapsulant structure.
Brief description of the drawings
Fig. 1 is silica gel shaping latter two sectional structure chart in background technology;
Fig. 2 is the cross-sectional view of the sealing structure of the embodiment of the present invention 1;
Fig. 3 is the cross-sectional view of the sealing structure of the embodiment of the present invention 2.
Embodiment
Technical solution of the present invention is described in detail below by accompanying drawing, but protection scope of the present invention is not limited to The embodiment.
A kind of hydrogen-oxygen proton exchange membrane fuel cell sealing structure, including the sealing ring being adapted to part edge to be sealed, Sealing ring includes the first containment member 1 and the second containment member 2, wherein, the first containment member 1 is made up of fluorubber material, the Two containment members 2 are made up of silastic material;Fluorubber and silicon rubber as the first containment member and the second containment member is equal It is made up of ordinary skill in the art means.
First containment member 1 is at least wrapped in the outside of the second containment member 2 and sealing medium contact surface, by the second sealing Component 2 is isolated with sealing medium.
The section of sealing ring is circular, semicircle, rectangle or polymorphic structure.The application does not make specifically to the shape of sealing ring Limit, for the structure of clearer explanation the application sealing ring, only with examples below by sealing ring two kinds of shapes therein State is illustrated.
Embodiment 1:When the section of sealing ring is circle, the second containment member 2 is filled circles column structure, the first sealing Part 1 is hollow tubular structures, and the first containment member 1 is wrapped in the outside of the second containment member 2, the second containment member 2 is sealed, And first containment member 1 bore it is consistent with the diameter of the second containment member 2.
The pipe thickness of first containment member 1 is that 0.5 ~ 0.55mm, pipe external diameter are 1.6 ~ 2mm.
Embodiment 2:When the section of sealing ring is semicircle, the second containment member 2 is flat column structure, first seal 1 is semi-cylindrical in configuration, and the cavity consistent with the shape of the second containment member 2, the second sealing are provided with the bottom of first seal 1 Component 2 is located in the cavity of first seal 1, is sealed the second containment member 2 by the first containment member 1.
A diameter of 1.6 ~ 2mm of first containment member 1, the distance of cavity wall to outer wall are 0.5 ~ 0.55mm.
As described above, although the present invention has been represented and described with reference to specific preferred embodiment, it must not be explained For to the limitation of itself of the invention., can be right under the premise of the spirit and scope of the present invention that appended claims are defined are not departed from Various changes can be made in the form and details for it.

Claims (7)

1. a kind of hydrogen-oxygen proton exchange membrane fuel cell sealing structure, including the sealing ring being adapted to part edge to be sealed, its It is characterised by, the sealing ring includes the first containment member and the second containment member, wherein, the first containment member is by fluorubber material Material is made, and the second containment member is made up of silastic material;
First containment member is at least wrapped in the outside of second containment member and sealing medium contact surface, by described Two containment members are isolated with sealing medium.
2. hydrogen-oxygen proton exchange membrane fuel cell sealing structure according to claim 1, it is characterised in that described first Containment member is completely encapsulated in the outside of second containment member, and second containment member is isolated with sealing medium.
3. hydrogen-oxygen proton exchange membrane fuel cell sealing structure according to claim 1, it is characterised in that the sealing The section of circle is circular, semicircle, rectangle or polymorphic structure.
4. hydrogen-oxygen proton exchange membrane fuel cell sealing structure according to claim 3, it is characterised in that the sealing When the section of circle is circle, second containment member is filled circles column structure, and the first seal is hollow tubular knot Structure, second containment member is located in the inner chamber of the first seal, and bore and the institute of first containment member The diameter for stating the second containment member is consistent.
5. hydrogen-oxygen proton exchange membrane fuel cell sealing structure according to claim 4, it is characterised in that described first The pipe thickness of containment member is that 0.5 ~ 0.55mm, pipe external diameter are 1.6 ~ 2mm.
6. hydrogen-oxygen proton exchange membrane fuel cell sealing structure according to claim 3, it is characterised in that the sealing When the section of circle is semicircle, second containment member is flat column or cylindrical-shaped structure, and the first seal is semicircle Rod structure, the cavity consistent with the second containment member shape, second sealing are provided with the bottom of the first seal Component is located in the cavity of the first seal.
7. hydrogen-oxygen proton exchange membrane fuel cell sealing structure according to claim 6, it is characterised in that described first A diameter of 1.6 ~ 2mm of containment member, the distance of cavity wall to outer wall are 0.5 ~ 0.55mm.
CN201710308662.9A 2017-05-04 2017-05-04 A kind of hydrogen-oxygen proton exchange membrane fuel cell sealing structure Pending CN106953108A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710308662.9A CN106953108A (en) 2017-05-04 2017-05-04 A kind of hydrogen-oxygen proton exchange membrane fuel cell sealing structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710308662.9A CN106953108A (en) 2017-05-04 2017-05-04 A kind of hydrogen-oxygen proton exchange membrane fuel cell sealing structure

Publications (1)

Publication Number Publication Date
CN106953108A true CN106953108A (en) 2017-07-14

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111224127A (en) * 2020-01-15 2020-06-02 同济大学 Fuel cell stack sealing structure and stress relaxation compensation method
CN114695913A (en) * 2020-12-30 2022-07-01 上海德迩新能源技术有限公司 Sealing ring assembly, assembling method of sealing ring and jig

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004055428A (en) * 2002-07-23 2004-02-19 Nok Corp Gasket for fuel cell
CN1496458A (en) * 2001-03-09 2004-05-12 Nok��ʽ���� Gasket
CN101617425A (en) * 2007-02-20 2009-12-30 丰田自动车株式会社 The sealing structure of fuel cell
CN101963227A (en) * 2010-09-07 2011-02-02 吴江朗科化纤有限公司 Sealing ring and processing method thereof
CN103131193A (en) * 2013-02-18 2013-06-05 湖北派克密封件有限公司 Fluorosilicone rubber sealing material and preparation method thereof for proton exchanging membrane battery
CN104356652A (en) * 2014-11-14 2015-02-18 无锡中洁能源技术有限公司 Preparation method of fluorinated silicone rubber material for proton exchange membrane fuel cell
CN207165687U (en) * 2017-05-04 2018-03-30 江苏氢电新能源有限公司 A kind of hydrogen-oxygen proton exchange membrane fuel cell sealing structure

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1496458A (en) * 2001-03-09 2004-05-12 Nok��ʽ���� Gasket
JP2004055428A (en) * 2002-07-23 2004-02-19 Nok Corp Gasket for fuel cell
CN101617425A (en) * 2007-02-20 2009-12-30 丰田自动车株式会社 The sealing structure of fuel cell
CN101963227A (en) * 2010-09-07 2011-02-02 吴江朗科化纤有限公司 Sealing ring and processing method thereof
CN103131193A (en) * 2013-02-18 2013-06-05 湖北派克密封件有限公司 Fluorosilicone rubber sealing material and preparation method thereof for proton exchanging membrane battery
CN104356652A (en) * 2014-11-14 2015-02-18 无锡中洁能源技术有限公司 Preparation method of fluorinated silicone rubber material for proton exchange membrane fuel cell
CN207165687U (en) * 2017-05-04 2018-03-30 江苏氢电新能源有限公司 A kind of hydrogen-oxygen proton exchange membrane fuel cell sealing structure

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111224127A (en) * 2020-01-15 2020-06-02 同济大学 Fuel cell stack sealing structure and stress relaxation compensation method
CN114695913A (en) * 2020-12-30 2022-07-01 上海德迩新能源技术有限公司 Sealing ring assembly, assembling method of sealing ring and jig

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Application publication date: 20170714