CN113764697B - Ultrahigh pressure forming method for bipolar plate of hydrogen fuel cell - Google Patents
Ultrahigh pressure forming method for bipolar plate of hydrogen fuel cell Download PDFInfo
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- CN113764697B CN113764697B CN202111054639.4A CN202111054639A CN113764697B CN 113764697 B CN113764697 B CN 113764697B CN 202111054639 A CN202111054639 A CN 202111054639A CN 113764697 B CN113764697 B CN 113764697B
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- material layer
- sheet material
- sealing
- fuel cell
- hydrogen fuel
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
- H01M8/0276—Sealing means characterised by their form
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
- H01M8/028—Sealing means characterised by their material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
- H01M8/0286—Processes for forming seals
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention provides a hydrogen fuel cell bipolar plate ultrahigh pressure forming method which ensures the stability and reliability of sealing in the forming process and ensures the reliable and rapid forming of parts. Which comprises the following steps: a. manufacturing an upper forming die and a water channel plate according to the corresponding shape of the hydrogen fuel cell bipolar plate; b. processing and manufacturing the composite sealing ring to enable the composite sealing ring to be embedded in the sealing groove; c. feeding, namely placing the sheet material part on the upper surface of the waterway plate, and enabling the sheet material part to cover the metal sealing material layer and the concave liquid outlet cavity; d. closing the die, namely tightly closing the forming die and the waterway plate to tightly press the sealing ring and the sheet material part; e. filling liquid, namely filling ultrahigh-pressure liquid, pressing the sheet material part onto the lower surface of the cavity, and forming the sheet material part into the same shape as the lower surface of the cavity by utilizing the plastic deformation of the sheet material part to finish the forming process; f. pressure relief: unloading the ultra-high pressure liquid pressure; g. opening the mould, taking out the part, putting the sheet material part again, and repeating the steps c-g.
Description
Technical Field
The invention relates to the technical field of forming of a bipolar plate of a hydrogen fuel cell, in particular to an ultrahigh pressure forming method of the bipolar plate of the hydrogen fuel cell.
Background
The hydrogen fuel cell bipolar plate forming method has two types: 1. punch forming, the shortcoming is: 1. both sides of the part are contacted with the die, so that the surface quality of the part cannot be ensured; 2. two molds are required to be manufactured on the molding part, so that the processing difficulty is high and the cost is high;
2. due to the fact that only part of the part is in contact with the die, the surface quality of the part is good, the die only needs to be half of the stamping die, and the cost of the die is low; the difficulty of ultrahigh pressure forming is that sealing cannot meet the requirement, so that pressure is insufficient, and parts cannot be formed.
The existing sealing materials are polymer materials such as rubber, polyurethane, polytetrafluoroethylene and the like, and the materials cannot bear the ultrahigh pressure required by the molding of the bipolar plate due to low strength; when the metal material is used as the sealing element, although the strength is ensured, the sealing element is lack of plasticity, and the sealing property cannot be ensured; therefore, a sealing device suitable for ultrahigh pressure forming of the bipolar plate of the hydrogen fuel cell is urgently needed to be found.
Disclosure of Invention
In order to solve the problems, the invention provides an ultrahigh pressure forming method of a bipolar plate of a hydrogen fuel cell, which enables the surface and the lower part of the whole part to be attached to form a sealing area in the part forming process through pressurization and expansion of ultrahigh pressure liquid, ensures the stability and the reliability of sealing in the forming process, and enables the part to be formed reliably and quickly.
An ultrahigh pressure forming method of a bipolar plate of a hydrogen fuel cell is characterized by comprising the following steps:
a. manufacturing an upper forming die and a waterway plate according to the corresponding shapes of the hydrogen fuel cell bipolar plate, wherein the upper forming die is correspondingly provided with a cavity, the waterway plate is provided with a concave liquid outlet cavity corresponding to the cavity, and concave sealing grooves are arranged on the periphery of the waterway plate relative to the concave liquid outlet cavity at intervals;
b. processing and manufacturing the composite sealing ring, so that the composite sealing ring is embedded in the sealing groove, and the upper surface part of the composite sealing ring is protruded on the upper surface of the waterway plate;
c. feeding: placing the sheet material part on the upper surface of the water path plate, and enabling the sheet material part to cover the metal sealing material layer and sink into the liquid outlet cavity;
d. die assembly: the forming die and the waterway plate are tightly closed, and the sealing ring and the sheet material part are tightly pressed;
e. liquid filling: filling ultrahigh-pressure liquid, pressing the sheet material part onto the lower surface of the cavity, and making the sheet material part into the same shape as the lower surface of the cavity by utilizing the plastic deformation of the sheet material part, so that the forming process is finished;
f. pressure relief: unloading the ultra-high pressure liquid pressure;
g. opening the mould, taking out the part, putting the sheet material part again, and repeating the steps c-g.
It is further characterized in that:
the composite sealing ring comprises a polymer sealing material layer and a metal sealing material layer, wherein the polymer sealing material layer is positioned at the bottom of the sealing groove, the metal sealing material layer is positioned at the upper part of the sealing groove, and the lower surface of the metal sealing material layer is arranged on the upper surface of the polymer sealing material layer in a pressing mode;
the water channel plate is concave in the central area of the water channel plate according to the surface area shape of the hydrogen fuel cell bipolar plate to form a concave liquid storage tank, a liquid tank channel is further arranged in the water channel plate and communicated to the concave liquid storage tank, and the exposed end of the liquid tank channel is used for being connected with ultrahigh-pressure liquid;
the total thickness of the metal sealing material layer and the polymer sealing material layer is 0.01-0.5 mm greater than the depth of the sealing groove;
the upper surface and the lower surface of the metal sealing material layer are both planes, the upper surface and the lower surface of the polymer sealing material layer are both planes, the bottom surface of the sealing groove is a plane, the width of the metal sealing material layer is smaller than that of the sealing groove at the corresponding position, and the width of the polymer sealing material layer is smaller than that of the sealing groove at the corresponding position;
the lower surface of the forming die is a pressing and attaching plane relative to the peripheral area of the cavity, the pressing and attaching plane is used for pressing and attaching the upper surface of a part, and the lower surface of the part is arranged in a manner of clinging to the upper surface of the metal sealing material layer;
the sealing groove is a closed groove body which is arranged with equal width and equal depth.
After adopting above-mentioned technical scheme, the metal sealing material layer is the upper strata of sealing washer, the polymer sealing material layer is the lower floor of sealing washer, be used for carrying out the in-process that warp the sheet stock part to the inner wall of die cavity when super high-pressure liquid, whole sealing washer possesses the plasticity promptly, its pressurized surface possesses sufficient intensity again, it makes and makes in the part forming process at super high-pressure liquid pressurization inflation, the surface and the lower part laminating of whole part form sealed region, guarantee sealed reliable and stable in the forming process, make the shaping of part reliable and fast.
Detailed Description
An ultrahigh pressure forming method of a bipolar plate of a hydrogen fuel cell is characterized by comprising the following steps:
a. manufacturing an upper forming die and a waterway plate according to the corresponding shapes of the hydrogen fuel cell bipolar plate, wherein the upper forming die is correspondingly provided with a cavity, the waterway plate is provided with a concave liquid outlet cavity corresponding to the cavity, and concave sealing grooves are arranged on the periphery of the waterway plate relative to the concave liquid outlet cavity at intervals;
b. processing and manufacturing the composite sealing ring, so that the composite sealing ring is embedded in the sealing groove, and the upper surface part of the composite sealing ring is protruded on the upper surface of the waterway plate;
c. feeding: placing the sheet material part on the upper surface of the water path plate, and enabling the sheet material part to cover the metal sealing material layer and sink into the liquid outlet cavity;
d. die assembly: the forming die and the waterway plate are tightly closed, and the sealing ring and the sheet material part are tightly pressed;
e. liquid filling: filling ultrahigh-pressure liquid, pressing the sheet material part onto the lower surface of the cavity, and making the sheet material part into the same shape as the lower surface of the cavity by using the plastic deformation of the sheet material part, so as to finish the forming process;
f. pressure relief: unloading the ultra-high pressure liquid pressure;
g. opening the mould, taking out the parts, putting the sheet material parts again, and repeating the steps c-g.
In specific implementation, the composite sealing ring comprises a polymer sealing material layer and a metal sealing material layer, wherein the polymer sealing material layer is positioned at the bottom of the sealing groove, the metal sealing material layer is positioned at the upper part of the sealing groove, and the lower surface of the metal sealing material layer is arranged on the upper surface of the polymer sealing material layer in a pressing mode;
the water channel plate is concave in the central area of the water channel plate according to the surface area shape of the hydrogen fuel cell bipolar plate to form a concave liquid storage tank, a liquid tank channel is also arranged in the water channel plate and communicated to the concave liquid storage tank, and the exposed end of the liquid tank channel is used for connecting ultrahigh-pressure liquid;
the total thickness of the metal sealing material layer and the polymer sealing material layer is 0.01-0.5 mm greater than the depth of the sealing groove;
the upper surface and the lower surface of the metal sealing material layer are both planes, the upper surface and the lower surface of the polymer sealing material layer are both planes, the bottom surface of the sealing groove is a plane, the width of the metal sealing material layer is smaller than that of the sealing groove at the corresponding position, and the width of the polymer sealing material layer is smaller than that of the sealing groove at the corresponding position;
the lower surface of the forming die is a pressing and attaching plane relative to the peripheral area of the cavity, the pressing and attaching plane is used for pressing and attaching the upper surface of the part, and the lower surface of the part is arranged in a manner of clinging to the upper surface of the metal sealing material layer;
the sealing groove is a closed groove body with equal width and equal depth.
In specific implementation, the polymer sealing material layer is made of a polymer material with plasticity and general flowing property after curing, such as rubber, polyurethane and polytetrafluoroethylene; the material of the metal sealing material layer is specifically a metal material with good strength and general plastic deformation, such as copper, stainless steel, alloy steel and the like.
Its theory of operation is as follows, the metal sealing material layer is the upper strata of sealing washer, the polymer sealing material layer is the lower floor of sealing washer, in the in-process that super high-pressure liquid is used for carrying out the sheet stock part to the inner wall of die cavity and warp, whole sealing washer possesses the plasticity promptly, it bears the pressure face and possesses sufficient intensity again, and because the whole width of sealing washer is less than the width of seal groove, the whole thickness of sealing washer is greater than the degree of depth of seal groove, when making the compound die, the surface of whole part and the upper surface of sealing washer form sealed area under the pressure effect, it makes and makes in the part forming process at super high-pressure liquid pressurization inflation, the surface and the sealing washer laminating of whole part form sealed area, guarantee sealed reliable and stable in the forming process, make the shaping of part reliable and fast.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. An ultrahigh pressure forming method of a bipolar plate of a hydrogen fuel cell is characterized by comprising the following steps:
a. manufacturing an upper forming die and a waterway plate according to the corresponding shapes of the hydrogen fuel cell bipolar plate, wherein the upper forming die is correspondingly provided with a cavity, the waterway plate is provided with a concave liquid outlet cavity corresponding to the cavity, and concave sealing grooves are arranged on the periphery of the waterway plate relative to the concave liquid outlet cavity at intervals;
b. processing and manufacturing the composite sealing ring, so that the composite sealing ring is embedded in the sealing groove, and the upper surface part of the composite sealing ring is protruded on the upper surface of the waterway plate;
c. feeding: placing the sheet material part on the upper surface of the water path plate, and enabling the sheet material part to cover the metal sealing material layer and sink into the liquid outlet cavity;
d. die assembly: the forming die and the waterway plate are tightly closed to tightly press the sealing ring and the sheet material part;
e. liquid filling: filling ultrahigh-pressure liquid, pressing the sheet material part onto the lower surface of the cavity, and making the sheet material part into the same shape as the lower surface of the cavity by using the plastic deformation of the sheet material part, so as to finish the forming process;
f. pressure relief: unloading the ultra-high pressure liquid pressure;
g. opening the mould, taking out the part, putting the sheet material part again, and repeating the steps c-g;
the composite sealing ring comprises a polymer sealing material layer and a metal sealing material layer, wherein the polymer sealing material layer is located at the bottom of the sealing groove, the metal sealing material layer is located at the upper part of the sealing groove, and the lower surface of the metal sealing material layer is pressed on the upper surface of the polymer sealing material layer.
2. The ultra-high pressure forming method of a bipolar plate for a hydrogen fuel cell according to claim 1, wherein: the water channel plate is concave in the central area of the water channel plate according to the surface area shape of the hydrogen fuel cell bipolar plate to form a concave storage tank, a liquid tank channel is further arranged in the water channel plate and communicated to the concave storage tank, and the exposed end of the liquid tank channel is used for being connected with ultrahigh-pressure liquid.
3. The ultra-high pressure forming method of a bipolar plate of a hydrogen fuel cell as claimed in claim 1, wherein: the sum total thickness of the metal sealing material layer and the polymer sealing material layer is 0.01-0.5 mm larger than the depth of the sealing groove.
4. The ultra-high pressure forming method of a bipolar plate of a hydrogen fuel cell as claimed in claim 1, wherein: the upper surface and the lower surface on metal seal material layer are the plane, the upper surface and the lower surface on polymer seal material layer are the plane, the bottom surface of seal groove is the plane, the width ratio on metal seal material layer is little than the width of the seal groove of corresponding position, the width ratio on polymer seal material layer is little than the width of the seal groove of corresponding position.
5. The ultra-high pressure forming method of a bipolar plate of a hydrogen fuel cell as claimed in claim 1, wherein: the lower surface of the forming die is a pressing attaching plane relative to the peripheral area of the cavity, the pressing attaching plane is used for pressing the upper surface of a part, and the lower surface of the part is arranged in a manner of clinging to the upper surface of the metal sealing material layer.
6. The ultra-high pressure forming method of a bipolar plate for a hydrogen fuel cell according to claim 1, wherein: the sealing groove is a closed groove body which is arranged with equal width and equal depth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111054639.4A CN113764697B (en) | 2021-09-09 | 2021-09-09 | Ultrahigh pressure forming method for bipolar plate of hydrogen fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111054639.4A CN113764697B (en) | 2021-09-09 | 2021-09-09 | Ultrahigh pressure forming method for bipolar plate of hydrogen fuel cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113764697A CN113764697A (en) | 2021-12-07 |
| CN113764697B true CN113764697B (en) | 2023-03-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111054639.4A Active CN113764697B (en) | 2021-09-09 | 2021-09-09 | Ultrahigh pressure forming method for bipolar plate of hydrogen fuel cell |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7592088B2 (en) * | 2004-08-25 | 2009-09-22 | Gm Global Technology Operations, Inc. | Seal configuration for fuel cell stack |
| CN1815783A (en) * | 2006-01-24 | 2006-08-09 | 南京博能燃料电池有限责任公司 | One-time glu-filling formation method for double-pole-plate sealing assembly |
| CN102306813B (en) * | 2011-08-12 | 2013-12-11 | 上海交通大学 | Fuel cell bipolar plate prepared through metal sheet stamping and forming, and application thereof |
| JP6363433B2 (en) * | 2014-09-02 | 2018-07-25 | Nok株式会社 | Gasket for laminated member |
| CN109357010A (en) * | 2018-11-21 | 2019-02-19 | 中国重型机械研究院股份公司 | A kind of a kind of sealing structure of the super super-pressure of metal hydrostatic extruder |
| CN110667048A (en) * | 2019-12-05 | 2020-01-10 | 武汉中极氢能产业创新中心有限公司 | Fuel cell seal forming device |
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2021
- 2021-09-09 CN CN202111054639.4A patent/CN113764697B/en active Active
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| CN113764697A (en) | 2021-12-07 |
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