CN109755603A - A kind of sandwich soft graphite bipolar plates of super thin metal thin plate and preparation method thereof - Google Patents
A kind of sandwich soft graphite bipolar plates of super thin metal thin plate and preparation method thereof Download PDFInfo
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- CN109755603A CN109755603A CN201910136543.9A CN201910136543A CN109755603A CN 109755603 A CN109755603 A CN 109755603A CN 201910136543 A CN201910136543 A CN 201910136543A CN 109755603 A CN109755603 A CN 109755603A
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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
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Abstract
The invention discloses sandwich soft graphite bipolar plates of a kind of super thin metal thin plate and preparation method thereof, it is related to field of fuel cell technology, soft graphite bipolar plates include upper layer and lower layer flexible graphite polar plate, sheet metal, the thin plate forms the sandwich hardened structure of the double materials of soft graphite base of sheet metal between upper layer and lower layer flexible graphite polar plate.The present invention is by being added sheet metal in pole plate flexible graphite plate raw material, ultrathin flexible graphite hydrogen-oxygen pole plate is prepared using press moulding mode, in the case where guaranteeing original flexible graphite polar plate behavior pattern, improve the intensity of bipolar plates, the thickness of bipolar plates is reduced, bipolar plates develop ultrathin flexible graphite bi-polar plate preparation process with a thickness of 1.0~2.0mm, the specific power density of pile is promoted, there is good practical value.
Description
Technical field
The present invention relates to field of fuel cell technology, and in particular to a kind of sandwich soft graphite bipolar plates of super thin metal thin plate
Preparation method.
Background technique
Fuel cell is a kind of device that hydrogen and oxygen are generated electricity by electrochemical oxidation reactions, and market prospects are very
It is wide.Fuel cell particularly may be divided into Proton Exchange Membrane Fuel Cells, high temperature solid oxide fuel cell, basic fuel electricity
Pond, phosphoric acid fuel cell and molten carbonate fuel cell.Wherein, Proton Exchange Membrane Fuel Cells is usually by membrane electrode, gas
The components such as body diffused layer, bipolar plates are alternately stacked.Bipolar plates are broadly divided into graphite bi-polar plate (hard graphite bi-polar plate and flexibility
Graphite bi-polar plate), composite material double pole plate and metal double polar plates.Wherein, the electric conductivity and corrosion resistance of hard graphite bi-polar plate compared with
Good, the disadvantage is that production process is complicated and stringent, work consuming is time-consuming, and the type bipolar plates matter is crisp, lacking toughness, uses difficulty in batches
It hands over greatly, and soft graphite has highly conductive and corrosion resistance characteristic, while having certain toughness again, can be molded mass production,
It can be ideal fuel battery double plates with large-scale production, but the meat soft graphite bipolar plates raw material actually used
The bipolar plate thickness of limited strength, preparation is to the rear, is unfavorable for the raising of battery volumetric specific power.
Currently, production super large high-efficiency fuel cell graphite electrode plate generallys use the mode for increasing thickness, graphite electrode plate is solved
Strength problem and flatness problem.Though increasing graphite electrode plate thickness can solve the defect of this problem, the disadvantage is that graphite
Materials are more, and raw materials consumption is big, and the production cost for directly resulting in graphite electrode plate significantly improves.And soft graphite has bipolar plates institute
Need it is conductive, thermally conductive and corrosion-resistant the advantages that, about pure soft graphite or soft graphite and resin composite bipolar plate research compared with
It is more, but the mechanical strength of such bipolar plates is still unable to satisfy requirement.Conductive material based on soft graphite, by certain
Enhancement Method, which improves its mechanicalness, will can prepare the battery bipolar plates of excellent combination property.
Summary of the invention
It is sandwich that a kind of super thin metal thin plate is provided it is an object of the invention to overcome in place of the shortcomings of the prior art
Soft graphite bipolar plates and preparation method thereof, the present invention is sandwich using two panels flexible graphite plate material intermetallic metal sheet panel top, benefit
Flexible graphite polar plate is prepared with mould pressing technology processing, then by the processing of vacuum injecting glue and hydrogen-oxygen pole plate bonding, is prepared ultra-thin
Soft graphite bipolar plates reduce bipolar plate thickness, improve the specific power density of fuel cell pack.
To achieve the above object, the technical scheme adopted by the invention is as follows: a kind of sandwich soft graphite of super thin metal thin plate is double
Pole plate, including upper layer and lower layer flexible graphite polar plate, sheet metal, the thin plate be located at upper layer and lower layer flexible graphite polar plate it
Between, form the sandwich soft graphite bipolar plate structure of sheet metal.
Currently in order to improving performance, production super large high-efficiency fuel cell graphite electrode plate generallys use the mode for increasing thickness,
To solve graphite electrode plate strength problem and flatness problem, though increasing graphite electrode plate thickness can solve the defect of this problem,
But the disadvantage is that graphite materials are more, raw materials consumption is big, the production cost for directly resulting in graphite electrode plate significantly improves, the present invention
Simple process only is carried out on the basis of prepared by original soft graphite bipolar plates, i.e., sticks metal foil in two layers of flexible graphite
Plate can prepare ultra-thin high tenacity graphite bi-polar plate, greatly improve the intensity and toughness of bipolar plates, reduce the thickness of bipolar plates
Degree, promotes the specific power density of pile, has good practical value.
As soft graphite bipolar plates preferred embodiment of the invention, the sheet metal thickness is 0.01~
0.1mm.It is found by inventor's lot of experiments, selects the sheet metal of this thickness both to can guarantee and its toughness is provided, is improved
Volumetric specific power density, and the thickness of flexible graphite plate can be substantially reduced, it is corrosion-resistant with traditional soft graphite bipolar plates
Feature performance benefit, while conventional flex graphite bi-polar plate toughness deficiency is overcome again, thickness is blocked up, the volumetric specific power density of pile
Low disadvantage.
As soft graphite bipolar plates preferred embodiment of the invention, the area of the sheet metal is less than upper layer and lower layer
The area of flexible graphite substrate, so that sheet metal is wrapped up by flexible graphite material.Sandwich sheet metal size outline is less than
The size of flexible graphite polar plate, sheet metal are wrapped up by flexible graphite plate, it is ensured that are bonded sufficiently, no between sandwich flexible graphite plate
There is lamination.
As soft graphite bipolar plates preferred embodiment of the invention, the upper and lower two layers of flexible graphite pole plate is thick
Degree is 1~5mm.
As soft graphite bipolar plates preferred embodiment of the invention, the sheet metal be stainless steel, copper, aluminium and
One of titanium alloy.
As soft graphite bipolar plates preferred embodiment of the invention, the flexible graphite plate density 0.1-0.2g/
cm3。
The present invention also provides the preparation methods of the soft graphite bipolar plates, comprising the following steps:
1) stainless sheet steel is sandwich among two layers of flexible graphite plate material, and it is greater than Thin Stainless Steel in flexible graphite plate
One layer of adhesive glue of place coating of plate, pressing form a soft graphite backing material plate sandwich with stainless sheet steel；
2) the hydrogen pole plate and oxygen pole plate of soft graphite bipolar plates, pole will be molded out with the sandwich flexible graphite plate of stainless sheet steel
Plate surface has hydrogen-oxygen runner trench and cooling duct groove, prepares hydrogen pole plate and oxygen pole plate；
3) dipping process is carried out to the soft graphite hydrogen-oxygen pole plate with sheet metal using vacuum injecting glue mode, then carries out pole
Plate cleaning and solidification.
4) the hydrogen-oxygen pole plate after dipping process is bonded curing process, it is double prepares the sandwich soft graphite of super thin metal thin plate
Pole plate.
Using the flexible graphite plate material of two layers of flexible graphite plate feed stock material one layer of sheet metal of viscous folder, molding processing
At hydrogen-oxygen pole plate, injecting glue processing is then carried out, then to injecting glue, treated that hydrogen-oxygen pole plate is bonded into bipolar plates, prepares one
Kind ultra-thin high tenacity graphite bi-polar plate, this method is simple, can be with mass production, and processing cost is low.
The preferred embodiment of preparation method as soft graphite bipolar plates of the invention, the super thin metal being prepared
The sandwich soft graphite bipolar plates of thin plate with a thickness of 1~2mm.
The beneficial effects of the present invention are: the present invention provides a kind of ultrathin flexible graphite bi-polar plate and preparation method thereof,
Simple process is carried out on the basis of preparing by original soft graphite bipolar plates, sheet metal is sticked in two layers of flexible graphite, i.e.,
Ultra-thin high tenacity graphite bi-polar plate can be prepared, the intensity and toughness of bipolar plates are greatly improved, reduces the thickness of bipolar plates, is promoted
The specific power density of pile has good practical value.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the sandwich flexible graphite plate of sheet metal in the present invention；
Fig. 2 is the structural schematic diagram of the invention with the sandwich soft graphite bipolar plates of sheet metal.
In figure: 1, flexible graphite plate；2, sheet metal.
Specific embodiment
To better illustrate the object, technical solutions and advantages of the present invention, below in conjunction with specific embodiment to the present invention
It is described further.
In following embodiments, the substance being not specifically noted commercially is obtained.
Embodiment
The embodiment of the sandwich soft graphite bipolar plates of super thin metal thin plate of the present invention, as shown in Fig. 1 to 2, this reality
Applying soft graphite bipolar plates described in example includes upper layer and lower layer flexible graphite polar plate 1, sheet metal 2, the sheet metal 2
Between upper layer and lower layer flexible graphite polar plate 1, the soft graphite bipolar plate structure sandwich with sheet metal 2 is formed.
Upper layer and lower layer flexible graphite polar plate material stock thickness is 1~5mm；Sheet metal with a thickness of 0.01~0.1mm, it is excellent
It is selected as 0.05mm, the area (area being in contact with flexible graphite plate) of sheet metal is less than soft graphite plate suqare, so that golden
Metal thin plate is wrapped up by flexible graphite plate；It is pressed and molded, at vacuum injecting glue by passing through two layers of flexible graphite pole plate 1, copper sheet 2
Reason, after pole plate bonding process, the sandwich soft graphite bipolar plate structure of the super thin metal thin plate being prepared with a thickness of 1~2mm,
Preferably 1.5mm.Flexible graphite plate density is 0.1~0.2g/cm3。
Preferably, the sheet metal is one of stainless steel, copper, aluminium and titanium alloy.
The preparation method of the sandwich soft graphite bipolar plates of the super thin metal thin plate of the present embodiment, comprising the following steps:
1) by among sandwich to 2 layers flexible graphite plate material of sheet metal, and it is greater than sheet metal in flexible graphite plate
One layer of adhesive glue of place coating, pressing form a soft graphite backing material plate sandwich with copper sheet.
2) the hydrogen pole plate and oxygen pole plate of soft graphite bipolar plates, hydrogen pole plate will be molded out with the sandwich flexible graphite plate of copper sheet
Surface Hydrogen runner trench and cooling duct groove, the aerobic runner trench of oxygen polar board surface and cooling duct groove, prepare hydrogen pole
Plate and oxygen pole plate；Preferably, Thickness ness 0.85mm hydrogen pole plate and the oxygen pole plate of thickness 0.65mm are prepared.
3) dipping process is carried out to the soft graphite hydrogen-oxygen pole plate with sheet metal using vacuum injecting glue mode, then carries out pole
Plate cleaning and solidification, improve the compactness of flexible graphite plate, sandwich sheet metal are prevented to be corroded.
4) the hydrogen-oxygen pole plate after dipping process is bonded curing process, it is sandwich soft prepares 1~2mm thickness super thin metal thin plate
Property graphite bi-polar plate.
It is involved in the present invention to vacuum injecting glue mode, dipping process, bonding curing process be all made of the prior art realize,
Special description is not done herein.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention rather than protects to the present invention
The limitation of range is protected, although the invention is described in detail with reference to the preferred embodiments, those skilled in the art should
Understand, it can be with modification or equivalent replacement of the technical solution of the present invention are made, without departing from the essence of technical solution of the present invention
And range.
Claims (8)
1. a kind of sandwich soft graphite bipolar plates of super thin metal thin plate, which is characterized in that including upper layer and lower layer flexible graphite polar plate,
Sheet metal, the thin plate form the sandwich soft graphite base of sheet metal between upper layer and lower layer flexible graphite polar plate
Double hardened structures of material.
2. soft graphite bipolar plates according to claim 1, which is characterized in that the sheet metal thickness be 0.01~
0.10mm。
3. soft graphite bipolar plates according to claim 1, which is characterized in that the area of the sheet metal is less than up and down
The area of two layers of flexible graphite substrate, so that sheet metal is wrapped up by flexible graphite material.
4. soft graphite bipolar plates according to claim 1, which is characterized in that the upper and lower two layers of flexible graphite pole
Plate thickness is 1~5mm.
5. soft graphite bipolar plates according to claim 1, which is characterized in that the sheet metal be stainless steel, copper,
One of aluminium and titanium alloy.
6. soft graphite bipolar plates according to claim 1, which is characterized in that the flexible graphite plate density 0.1-
0.2g/cm3。
7. a kind of preparation method of such as soft graphite bipolar plates as claimed in any one of claims 1 to 6, which is characterized in that including
Following steps:
1) stainless sheet steel is sandwich among two layers of flexible graphite plate material, and it is greater than stainless sheet steel in flexible graphite plate
One layer of adhesive glue of place coating, pressing form a soft graphite backing material plate sandwich with stainless sheet steel；
2) the hydrogen pole plate and oxygen pole plate of soft graphite bipolar plates, pole plate table will be molded out with the sandwich flexible graphite plate of stainless sheet steel
Face has hydrogen-oxygen runner trench and cooling duct groove, prepares hydrogen pole plate and oxygen pole plate；
3) dipping process is carried out to the soft graphite hydrogen-oxygen pole plate with sheet metal using vacuum injecting glue mode, then to carry out pole plate clear
It washes and solidifies.
4) the hydrogen-oxygen pole plate after dipping process is bonded curing process, it is bipolar prepares the sandwich soft graphite of super thin metal thin plate
Plate.
8. the preparation method of soft graphite bipolar plates according to claim 7, which is characterized in that the ultra-thin gold being prepared
The sandwich soft graphite bipolar plates of metal thin plate with a thickness of 1~2mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910136543.9A CN109755603A (en) | 2019-02-22 | 2019-02-22 | A kind of sandwich soft graphite bipolar plates of super thin metal thin plate and preparation method thereof |
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| CN201910136543.9A CN109755603A (en) | 2019-02-22 | 2019-02-22 | A kind of sandwich soft graphite bipolar plates of super thin metal thin plate and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111063907A (en) * | 2019-11-21 | 2020-04-24 | 一汽解放汽车有限公司 | Composite bipolar plate and preparation method and application thereof |
| CN111180753A (en) * | 2020-01-15 | 2020-05-19 | 浙江泓林新能源科技有限公司 | Method for processing metal bipolar plate of fuel cell |
| CN111697248A (en) * | 2020-06-22 | 2020-09-22 | 内蒙古中科四维热管理材料有限公司 | Metal composite graphite bipolar plate and preparation method thereof |
| CN113540486A (en) * | 2021-07-15 | 2021-10-22 | 佛山科学技术学院 | Composite flexible graphite bipolar plate and preparation method thereof |
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| CN1684825A (en) * | 2002-04-05 | 2005-10-19 | 韦伯斯特塑料公司 | Graphite laminate fuel cell plate |
| CN101005137A (en) * | 2006-01-18 | 2007-07-25 | 中国科学院大连化学物理研究所 | Process for producing bipolar plate for proton exchange film fuel cell |
| CN201868508U (en) * | 2010-08-11 | 2011-06-15 | 浙江神通氢燃料电池科技有限公司 | Graphite bipolar plate of fuel battery |
| CN107658483A (en) * | 2016-07-25 | 2018-02-02 | 江苏锐智医疗器械科技有限公司 | A kind of bipolar plate structure hydrogen fuel cell |
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2019
- 2019-02-22 CN CN201910136543.9A patent/CN109755603A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1684825A (en) * | 2002-04-05 | 2005-10-19 | 韦伯斯特塑料公司 | Graphite laminate fuel cell plate |
| CN101005137A (en) * | 2006-01-18 | 2007-07-25 | 中国科学院大连化学物理研究所 | Process for producing bipolar plate for proton exchange film fuel cell |
| CN201868508U (en) * | 2010-08-11 | 2011-06-15 | 浙江神通氢燃料电池科技有限公司 | Graphite bipolar plate of fuel battery |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111063907A (en) * | 2019-11-21 | 2020-04-24 | 一汽解放汽车有限公司 | Composite bipolar plate and preparation method and application thereof |
| CN111180753A (en) * | 2020-01-15 | 2020-05-19 | 浙江泓林新能源科技有限公司 | Method for processing metal bipolar plate of fuel cell |
| CN111180753B (en) * | 2020-01-15 | 2021-05-07 | 浙江泓林新能源科技有限公司 | Method for processing metal bipolar plate of fuel cell |
| CN111697248A (en) * | 2020-06-22 | 2020-09-22 | 内蒙古中科四维热管理材料有限公司 | Metal composite graphite bipolar plate and preparation method thereof |
| CN113540486A (en) * | 2021-07-15 | 2021-10-22 | 佛山科学技术学院 | Composite flexible graphite bipolar plate and preparation method thereof |
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Application publication date: 20190514 |