CN114801266A - Flexible graphite polar plate processing method, fuel cell and vehicle - Google Patents
Flexible graphite polar plate processing method, fuel cell and vehicle Download PDFInfo
- Publication number
- CN114801266A CN114801266A CN202110067323.2A CN202110067323A CN114801266A CN 114801266 A CN114801266 A CN 114801266A CN 202110067323 A CN202110067323 A CN 202110067323A CN 114801266 A CN114801266 A CN 114801266A
- Authority
- CN
- China
- Prior art keywords
- flexible graphite
- resin
- curing
- plate
- pole plate
- 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.)
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 83
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 83
- 239000010439 graphite Substances 0.000 title claims abstract description 83
- 239000000446 fuel Substances 0.000 title claims abstract description 16
- 238000003672 processing method Methods 0.000 title abstract description 8
- 239000011347 resin Substances 0.000 claims abstract description 62
- 229920005989 resin Polymers 0.000 claims abstract description 62
- 238000000034 method Methods 0.000 claims abstract description 21
- 239000003999 initiator Substances 0.000 claims abstract description 20
- 238000007598 dipping method Methods 0.000 claims abstract description 5
- 238000001035 drying Methods 0.000 claims abstract description 5
- 239000011259 mixed solution Substances 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical group N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 5
- 238000007711 solidification Methods 0.000 abstract description 11
- 230000008023 solidification Effects 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000005265 energy consumption Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
- B29D7/01—Films or sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/70—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by fuel cells
- B60L50/72—Constructional details of fuel cells specially adapted for electric vehicles
-
- 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
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0204—Non-porous and characterised by the material
- H01M8/0213—Gas-impermeable carbon-containing materials
Abstract
The invention relates to the technical field of fuel cells, in particular to a flexible graphite polar plate processing method, a fuel cell and a vehicle, wherein the method comprises the following steps of dipping a flexible graphite polar plate in a mixed solution containing resin and a resin initiator, wherein the ratio of the resin to the resin initiator is 1: 0.1% -2%; primarily curing the impregnated flexible graphite pole plate, taking out the flexible graphite pole plate after the curing degree of the resin is 60-90%, and placing the flexible graphite pole plate into a drying oven for secondary curing; during secondary curing, the tool is attached to and tightly pressed with the flexible graphite pole plate; according to the invention, the proportion of the resin to the resin initiator is adjusted, so that the resin curing process meets the requirements of two times of curing; realize holistic solidification function through preliminary solidification, realize the function of flattening through the secondary cure, shorten the processing cycle of flexible graphite polar plate, improve production efficiency, and fashioned flexible graphite polar plate just is difficult for the bounce-back at the roughness well.
Description
Technical Field
The invention relates to the technical field of fuel cells, in particular to a flexible graphite polar plate processing method, a fuel cell and a vehicle.
Background
The fuel cell is a chemical device which directly converts chemical energy of fuel into electric energy, has no noise and no harmful gas, is a clean and efficient green environment-friendly power supply, and brings about a new energy revolution in the 21 st century. The bipolar plate is used as a key part of the fuel cell, and the bipolar plates commonly adopted in the industry comprise a metal bipolar plate and a graphite bipolar plate. Compared with metal bipolar plates, flexible graphite bipolar plates have the characteristics of high conductivity, corrosion resistance, light weight and the like, and become the development focus of the bipolar plates.
After the existing flexible graphite bipolar plate is subjected to compression molding and resin impregnation, the resin entering the pores of the flexible graphite bipolar plate needs to be cured, so that the strength of the flexible graphite bipolar plate is improved, and the air impermeability of the flexible graphite bipolar plate is ensured.
But flexible graphite polar plate solidification formula is mainly packed into the utensil of holding with flexible graphite polar plate and then is carried out the water bath or toasts the solidification, and flexible graphite polar plate thickness is thin can produce the deformation because of the solidification internal stress, so still need carry out flexible graphite polar plate flattening operation after the solidification to satisfy the roughness requirement of polar plate.
Because the resin used for impregnating the flexible graphite electrode plate is generally thermosetting resin, the flexible graphite electrode plate is difficult to deform again after the resin is cured, and the flexible graphite electrode plate needs to be heated to be close to the glass transition temperature of the resin to soften the resin and then to be flattened in a pressurizing mode. The flexible graphite pole plate is leveled, and energy consumption and time consumption are caused during processing. In addition, the conventional leveling operation is to place the flexible graphite electrode plates in a leveling tool and a hot press for heating and pressurizing, in order to reduce the operation time, 10 to 20 flexible graphite electrode plates are usually stacked in a batch and then leveled in the leveling tool, and after being taken out from the hot pressing equipment, the flexible graphite electrode plates need to be cooled to the normal temperature in the tool, so that the time of the whole process is long, and the large-scale production is not facilitated.
Chinese patent CN108407099A mentions a leveling device for graphite electrode plates, which levels graphite electrode plates after they are bonded into bipolar plates, and places 5-15 electrode plates in the device each time and puts them into an oven after they are compressed, and the graphite electrode plates are leveled by the temperature of the oven and the pressure of the leveling device. The device is used for leveling operation, a large amount of heat energy is acted on the tool, time is consumed for heat dissipation after cooling, a large amount of tools are needed during mass production, and the degree of continuity is low.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the flexible graphite electrode plate processing method, the fuel cell and the vehicle can shorten the processing time, reduce the energy consumption and ensure the flatness of the flexible graphite electrode plate.
In order to solve the above technical problems, a first technical solution adopted by the present invention is:
a method for processing flexible graphite electrode plate includes
Dipping the flexible graphite pole plate in a mixed solution containing resin and a resin initiator, wherein the ratio of the resin to the resin initiator is 1: 0.1% -2%;
primarily curing the impregnated flexible graphite pole plate, taking out the flexible graphite pole plate after the curing degree of the resin is 60-90%, and placing the flexible graphite pole plate into an oven for secondary curing;
and (5) attaching and pressing the tool and the flexible graphite pole plate during secondary curing.
In order to solve the above technical problem, the second technical solution adopted by the present invention is:
a fuel cell comprises a plurality of flexible graphite electrode plates obtained by the processing method of the flexible graphite electrode plates.
In order to solve the above technical problems, the third technical solution adopted by the present invention is:
a vehicle includes the fuel cell.
The invention has the beneficial effects that: the ratio of resin to a resin initiator is adjusted, the flexible graphite pole plate is primarily cured to 60-90%, the flexible graphite pole plate can have certain rigidity and certain deformation capacity, the tool is used for attaching and pressing the flexible graphite pole plate during secondary curing, the shape and the flatness of the flexible graphite pole plate after secondary curing are guaranteed, and meanwhile, an oven is used for secondary curing, so that the curing speed can be increased, and the subsequent curing time can be shortened; realize holistic solidification function through preliminary solidification, realize the function of flattening through the secondary cure, eliminate high temperature flattening operation in the past, reduce the energy consumption in the flexible graphite polar plate production process, shorten the processing cycle of flexible graphite polar plate, improve production efficiency, and its roughness is guaranteed at the solidification process to fashioned flexible graphite polar plate, and the roughness is good and difficult bounce-back.
Detailed Description
The following description will be given with reference to the embodiments in order to explain the technical content, the objects and the effects of the present invention in detail.
A method for processing flexible graphite electrode plate includes
Dipping the flexible graphite pole plate in a mixed solution containing resin and a resin initiator, wherein the ratio of the resin to the resin initiator is 1: 0.1% -2%;
primarily curing the impregnated flexible graphite pole plate, taking out the flexible graphite pole plate after the curing degree of the resin is 60-90%, and placing the flexible graphite pole plate into an oven for secondary curing;
and (5) attaching and pressing the tool and the flexible graphite pole plate during secondary curing.
From the above description, by adjusting the ratio of the resin to the resin initiator, the resin curing process can meet the requirement of two times of curing; the flexible graphite pole plate can have certain rigidity and certain deformation capacity by primarily curing to 60-90%, the shape and the flatness of the flexible graphite pole plate after secondary curing are ensured by using the tool to be attached and pressed with the flexible graphite pole plate during secondary curing, and meanwhile, the secondary curing is carried out by using an oven, so that the curing speed can be increased and the subsequent curing time can be shortened; realize holistic solidification function through preliminary solidification, realize the function of flattening through the secondary cure, eliminate high temperature flattening operation in the past, reduce the energy consumption in the flexible graphite polar plate production process, shorten the processing cycle of flexible graphite polar plate, improve production efficiency, and its roughness is guaranteed at the curing process to fashioned flexible graphite polar plate, and the roughness is good and difficult bounce-back.
Further, the ratio of the resin to the resin initiator is 1: 0.3 to 1 percent.
Further, the primary curing is water bath curing.
From the above description, it can be known that, by curing in a water bath, the curing process can be uniformly heated, and the heating efficiency is improved to avoid the risk of foaming in the direct baking and curing process of the oven.
Further, the water bath curing temperature is 85-95 ℃, and the curing time is 1-10 min.
Further, the curing time of the water bath is 1-3min.
Further, the temperature in the oven is 95-130 ℃.
Further, the resin on the surface of the flexible graphite pole plate is cleaned before the flexible graphite pole plate is primarily cured.
Further, the resin initiator is azobisisobutyronitrile.
Example one
A method for processing flexible graphite electrode plate includes
Dipping the flexible graphite pole plate in a mixed solution containing resin and a resin initiator, wherein the ratio of the resin to the resin initiator is 1: 0.75 percent; the resin initiator is azobisisobutyronitrile.
And cleaning the impregnated flexible graphite pole plate to remove resin on the surface, and then carrying out water bath curing at the temperature of 90 ℃ for 2 min.
Taking out the resin after the curing degree of the resin is 75%, and putting the resin into a drying oven for secondary curing; the temperature in the oven was 100 ℃.
And (5) attaching and pressing the tool and the flexible graphite pole plate during secondary curing.
The tool is a flat plate with a flow channel.
Example two
The same parts of a flexible graphite electrode plate processing method as the first embodiment are not described in detail, wherein
The ratio of the resin to the resin initiator is 1: 0.3 percent;
the curing temperature of the water bath is 95 ℃, and the curing time is 3min.
Taking out the resin after the curing degree of the resin is 90%, and putting the resin into a drying oven for secondary curing; the temperature in the oven was 130 ℃.
EXAMPLE III
The same parts of a method for processing a flexible graphite electrode plate as those of the first embodiment will not be described again
The ratio of the resin to the resin initiator is 1: 1 percent;
the curing temperature of the water bath is 85 ℃, and the curing time is 1 min.
Taking out the resin after the curing degree of the resin is 60%, and putting the resin into a drying oven for secondary curing; the temperature in the oven was 95 ℃.
Example four
A fuel cell comprising a flexible graphite electrode plate obtained by the flexible graphite electrode plate processing method according to any one of the first to third embodiments.
EXAMPLE five
A vehicle comprising the fuel cell of embodiment four.
The above description is only an example of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by the present specification, or directly or indirectly applied to the related technical field are included in the scope of the present invention.
Claims (10)
1. The method for processing the flexible graphite polar plate is characterized by comprising the following steps
Dipping the flexible graphite electrode plate in a mixed solution containing resin and a resin initiator, wherein the ratio of the resin to the resin initiator is 1: 0.1% -2%;
primarily curing the impregnated flexible graphite pole plate, taking out the flexible graphite pole plate after the curing degree of the resin is 60-90%, and placing the flexible graphite pole plate into a drying oven for secondary curing;
and (5) attaching and pressing the tool and the flexible graphite pole plate during secondary curing.
2. The method of processing a flexible graphite plate of claim 1, wherein the ratio of resin to resin initiator is 1: 0.3 to 1 percent.
3. The method of claim 1, wherein the initial curing is water bath curing.
4. The method for processing the flexible graphite electrode plate according to claim 3, wherein the water bath curing temperature is 85-95 ℃, and the curing time is 1-10 min.
5. The method of claim 4, wherein the water bath curing time is 1-3min.
6. The method of processing flexible graphite plates as claimed in claim 1, wherein the temperature in the oven is 95 ℃ to 130 ℃.
7. The method of claim 1, wherein the resin on the surface of the flexible graphite plate is cleaned before the flexible graphite plate is initially cured.
8. The method of claim 1, wherein the resin initiator is azobisisobutyronitrile.
9. A fuel cell comprising a plurality of flexible graphite plates obtained by the method for processing flexible graphite plates according to any one of claims 1 to 8.
10. A vehicle characterized by comprising the fuel cell according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110067323.2A CN114801266A (en) | 2021-01-19 | 2021-01-19 | Flexible graphite polar plate processing method, fuel cell and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110067323.2A CN114801266A (en) | 2021-01-19 | 2021-01-19 | Flexible graphite polar plate processing method, fuel cell and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114801266A true CN114801266A (en) | 2022-07-29 |
Family
ID=82525238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110067323.2A Pending CN114801266A (en) | 2021-01-19 | 2021-01-19 | Flexible graphite polar plate processing method, fuel cell and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114801266A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020114952A1 (en) * | 2000-12-07 | 2002-08-22 | Oswin Ottinger | Impregnated bodies made of expanded graphite, process for producing such bodies and sealing elements, fuel cell components and heat-conducting elements formed of the bodies |
| CN1992399A (en) * | 2005-12-28 | 2007-07-04 | 大连新源动力股份有限公司 | Method for preparation of flexible graphite material for fuel cell with groove plate on both sides |
| CN1997510A (en) * | 2004-02-26 | 2007-07-11 | 先进能源科技公司 | Treatment of flexible graphite material and method thereof |
| CN101447571A (en) * | 2008-12-29 | 2009-06-03 | 新源动力股份有限公司 | Preparation method of flexible graphite composite bipolar plate of proton exchange membrane fuel cell |
| CN102931420A (en) * | 2012-11-01 | 2013-02-13 | 华东理工大学 | Carbon/resin composite material and application thereof |
| CN109216713A (en) * | 2018-10-31 | 2019-01-15 | 长兴欧森科技有限公司 | A kind of fuel cell flexible graphite bi-polar plate volume production production system and its production method |
-
2021
- 2021-01-19 CN CN202110067323.2A patent/CN114801266A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020114952A1 (en) * | 2000-12-07 | 2002-08-22 | Oswin Ottinger | Impregnated bodies made of expanded graphite, process for producing such bodies and sealing elements, fuel cell components and heat-conducting elements formed of the bodies |
| CN1997510A (en) * | 2004-02-26 | 2007-07-11 | 先进能源科技公司 | Treatment of flexible graphite material and method thereof |
| CN1992399A (en) * | 2005-12-28 | 2007-07-04 | 大连新源动力股份有限公司 | Method for preparation of flexible graphite material for fuel cell with groove plate on both sides |
| CN101447571A (en) * | 2008-12-29 | 2009-06-03 | 新源动力股份有限公司 | Preparation method of flexible graphite composite bipolar plate of proton exchange membrane fuel cell |
| CN102931420A (en) * | 2012-11-01 | 2013-02-13 | 华东理工大学 | Carbon/resin composite material and application thereof |
| CN109216713A (en) * | 2018-10-31 | 2019-01-15 | 长兴欧森科技有限公司 | A kind of fuel cell flexible graphite bi-polar plate volume production production system and its production method |
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