CN111342078A - Low-conductivity core body for fuel cell and processing technology - Google Patents
Low-conductivity core body for fuel cell and processing technology Download PDFInfo
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- CN111342078A CN111342078A CN202010138763.8A CN202010138763A CN111342078A CN 111342078 A CN111342078 A CN 111342078A CN 202010138763 A CN202010138763 A CN 202010138763A CN 111342078 A CN111342078 A CN 111342078A
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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
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
- H01M8/04029—Heat exchange using liquids
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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
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
- H01M8/04067—Heat exchange or temperature measuring elements, thermal insulation, e.g. heat pipes, heat pumps, fins
- H01M8/04074—Heat exchange unit structures specially adapted for fuel cell
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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
- H01M2250/00—Fuel cells for particular applications; Specific features of fuel cell system
- H01M2250/20—Fuel cells in motive systems, e.g. vehicle, ship, plane
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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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- 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
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- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Abstract
The invention relates to a low-conductivity core body for a fuel cell and a processing technology thereof, wherein the core body comprises a radiating pipe, a radiating belt, a main board and a protective board, wherein an anti-corrosion layer and an anti-corrosion insulating layer are arranged on the inner wall of the radiating pipe and the surface of the main board, which is in contact with a cooling liquid, from inside to outside, the anti-corrosion layer comprises a compact oxide film formed by aluminum oxide, and the anti-corrosion insulating layer comprises an anti-corrosion insulating film formed by water-based epoxy resin, graphene and mixed resin.
Description
Technical Field
The invention relates to the field of heat dissipation systems, in particular to a low-conductivity core body for a fuel cell and a processing technology.
Background
With the development of the automobile industry and the improvement of the national requirement on environmental protection, the whole automobile is required to be more environment-friendly in the development direction. As a 'zero emission and pollution-free' carrying tool in the real sense, the hydrogen fuel cell automobile is one of the main development directions of new energy clean power automobiles in the future. The hydrogen fuel cell is a power generation device which directly converts chemical energy generated by the reaction of hydrogen and oxygen into electric energy through chemical reaction, and has the advantages of high power generation efficiency, small environmental pollution and the like. The fuel cell generates a great amount of heat, and therefore, a heat dissipation system composed of a radiator and other parts is required to realize temperature control of the stack. Compared with the traditional engine, the fuel cell engine requires that the ion precipitation in the heat dissipation system is maintained in a certain range, so that the conductivity of cooling liquid in the system is at a lower level, and the normal operation of the fuel cell is ensured. Although the traditional radiator can achieve the mode of reducing the conductivity through a complex cleaning process at present, the traditional radiator cannot be produced in batches, the conductivity can be gradually increased along with the time, and risks are brought to the whole vehicle.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a low-conductivity core body for a fuel cell and a processing technology thereof.
The invention is realized by the following technical scheme, and provides a processing technology of a low-conductivity core body for a fuel cell, which comprises the following steps:
a. placing the plate for processing the main plate into a corrosion-resistant solution at 50-100 ℃ for washing for 3-10 min, washing only one surface during washing, and then drying, wherein the corrosion-resistant solution comprises sodium carbonate, sodium hydroxide and trisodium phosphate, the pH value of the corrosion-resistant solution is 7-10, and the corrosion-resistant solution comprises the following raw materials in parts by weight: sodium carbonate: 30-50 parts of sodium hydroxide: 10-30 parts of trisodium phosphate: 30-50 parts. By washing in the corrosion-resistant solution, a layer of compact oxide film formed by aluminum oxide is formed on the surface of the plate, so that electric ions seeped out from the core material can be effectively prevented, the internal conductivity of the heat dissipation system is effectively ensured to be in a lower state, and the service performance of the product is improved.
b. The plate material treated by the corrosion-resistant solution is placed into the corrosion-resistant insulating solution at 50-300 ℃ to be washed for 10-30 min, the surface washed by the corrosion-resistant solution is only washed during washing, then the plate material is dried, the corrosion-resistant insulating solution comprises a solution formed by water-based epoxy resin, graphene and mixed resin, and the corrosion-resistant insulating solution comprises the following raw materials in parts by weight: water-based epoxy resin: 20-40 parts of graphene: 20-40 parts of mixed resin: 30-50 parts of mixed resin, wherein the mixed resin comprises acrylic acid, hydroxyethyl, acrylamide, sodium allyl glycidyl rice sulfonate, vinyl acetate and sodium 2-allyl-2-methylpropanesulfonate. By washing in the corrosion-resistant insulating solution, a layer of corrosion-resistant insulating film consisting of the water-based epoxy resin, the graphene and the mixed resin is formed on the surface of the plate, so that the plate can be effectively prevented from being corroded by the antifreezing solution, ions in the material can be prevented from diffusing to the cooling liquid due to the insulating property of the antifreezing solution, and the internal conductivity of the cooling liquid can be effectively reduced.
c. Bending the radiating pipe and the plate of the main board respectively, and brazing and molding the radiating pipe and the plate together with the radiating belt and the protective plate, wherein when the plate of the main board is bent, the processed surface is bent into a surface contacting with the cooling liquid;
d. washing the interior of a radiating pipe of a core body formed by brazing for 3-10 min by using a corrosion-resistant solution with the temperature of 50-100 ℃, and then drying, wherein the corrosion-resistant solution comprises sodium carbonate, sodium hydroxide and trisodium phosphate, the pH value of the corrosion-resistant solution is 7-10, and the corrosion-resistant solution comprises the following raw materials in parts by weight: 30-50 parts of sodium carbonate, sodium hydroxide: 10-30 parts of trisodium phosphate: 30-50 parts. Through washing the inside in corrosion-resistant solution of cooling tube, form the fine and close oxide film that a layer of aluminium oxide constitutes inside the cooling tube, can effectually prevent the electric ion that oozes from the core material, the inside conductivity of effectual assurance cooling system is in lower state, improves the performance of product.
e. The method comprises the following steps of washing the inside of a radiating pipe of a core body formed by brazing by using a corrosion-resistant insulating solution at the temperature of 50-300 ℃, wherein the washing time is 10-30 min, and then drying the radiating pipe, wherein the corrosion-resistant insulating solution comprises a solution consisting of water-based epoxy resin, graphene and mixed resin, and the corrosion-resistant insulating solution comprises the following raw materials in parts by weight: water-based epoxy resin: 20-40 parts of graphene: 20-40 parts of mixed resin: 30-50 parts of mixed resin, wherein the mixed resin comprises acrylic acid, hydroxyethyl, acrylamide, sodium allyl glycidyl rice sulfonate, vinyl acetate and sodium 2-allyl-2-methylpropanesulfonate. Through washing in the corrosion-resistant insulating solution, a layer of corrosion-resistant insulating film formed by water-based epoxy resin, graphene and mixed resin is formed inside the radiating pipe, so that the corrosion of the anti-freezing solution on the plate can be effectively prevented, and meanwhile, the insulating property of the anti-freezing solution can prevent ions inside the material from diffusing to the cooling liquid, and the internal conductivity of the cooling liquid is effectively reduced.
As an optimization, after the step a is completed, marking is carried out on the washed surface.
Through the mark in this scheme, can be in the welding process of bending, be convenient for discern the face after washing, be convenient for process into the face with the coolant liquid contact with the face after will washing.
And d, preferably, the method further comprises an air tightness detection procedure arranged between the step c and the step d, wherein the air tightness detection procedure is to respectively communicate two ends of the core body formed by brazing with detection pipelines, a barometer is arranged on each detection pipeline, the detection pipelines are sealed after high-pressure gas is injected, and whether the numerical value of the barometer changes is observed.
The air tightness detection process in the scheme can carry out air tightness detection on the process after bending welding, and prevent a workpiece with insufficient air tightness from entering the next process.
Preferably, the drying operation in the step d and the drying operation in the step e are realized by communicating one end of the core body with an air blowing pipeline and blowing 50-100 degrees of air into the core body through the air blowing pipeline.
The utility model provides a low conductivity core for fuel cell, includes cooling tube, heat dissipation area, mainboard and backplate, be equipped with corrosion-resistant layer and corrosion-resistant insulating layer from inside to outside on the inner wall of cooling tube and the mainboard and the coolant liquid contact's the face, corrosion-resistant layer includes the compact oxide film that aluminium oxide constitutes, corrosion-resistant insulating layer includes the corrosion-resistant insulating film that waterborne epoxy, graphite alkene and mixed resin constitute, mixed resin includes acrylic acid, hydroxyethyl, acrylamide, allyl glycidyl rice sodium sulfonate, vinyl acetate and 2-allyl acyl-2-methyl propyl sodium sulfonate.
The invention has the beneficial effects that: according to the low-conductivity core body for the fuel cell and the processing technology, the novel material is used, the novel processing technology is carried out on the core body structure of the radiator, the conductivity of the fuel cell radiator is reduced, and compared with the traditional fuel cell radiator, the low-conductivity core body has the characteristics of constant conductivity, low production cost and high production efficiency, and has a great propulsion effect on the future rapid development of the fuel cell and the batch production of the fuel cell radiator.
Drawings
FIG. 1 is a front view of the structure of the present invention;
FIG. 2 is a top view of the structure of the present invention;
FIG. 3 is an enlarged view of portion A of FIG. 1 in accordance with the present invention;
FIG. 4 is a schematic view of a plate-fin core of the present invention;
shown in the figure:
1. backplate, 2, cooling tube, 3, heat dissipation area, 4, mainboard.
Detailed Description
In order to clearly illustrate the technical features of the present solution, the present solution is explained below by way of specific embodiments.
As shown in fig. 1 to 4, the low-conductivity core for a fuel cell of the present invention includes a heat dissipation tube 2, a heat dissipation belt 3, a main plate 4, and a protection plate 1, wherein a corrosion-resistant layer and a corrosion-resistant insulating layer are disposed from inside to outside on an inner wall of the heat dissipation tube 2 and a surface of the main plate 4 in contact with a coolant, the corrosion-resistant layer includes a dense oxide film made of alumina, the corrosion-resistant insulating layer includes a corrosion-resistant insulating film made of a water-based epoxy resin, graphene, and a mixed resin, and the mixed resin includes acrylic acid, hydroxyethyl, acrylamide, sodium allyl glycidyl glutamate, vinyl acetate, and 2-allyl-2-methyl sodium sulfonate.
A processing technology of a low-conductivity core body for a fuel cell comprises the following steps:
and (3) putting the plate for processing the main plate into a corrosion-resistant solution at 50-100 ℃ for washing for 3-10 min, washing only one surface during washing, and then drying.
The corrosion-resistant solution comprises sodium carbonate, sodium hydroxide and trisodium phosphate, the pH value of the corrosion-resistant solution is 7-10, and the corrosion-resistant solution comprises the following raw materials in parts by weight: sodium carbonate: 40 parts, sodium hydroxide: 20 parts, trisodium phosphate: 40 parts of the components.
By washing in the corrosion-resistant solution, a layer of compact oxide film formed by aluminum oxide is formed on the surface of the plate, so that electric ions seeped out from the core material can be effectively prevented, the internal conductivity of the heat dissipation system is effectively ensured to be in a lower state, and the service performance of the product is improved.
And after the steps are finished, marking the washed surface so as to be convenient for identification in the subsequent bending welding process.
And (3) putting the plate treated by the corrosion-resistant solution into a corrosion-resistant insulating solution at the temperature of 50-300 ℃ for washing for 10-30 min, washing the surface washed by the corrosion-resistant solution only during washing, and drying.
The corrosion-resistant insulating solution comprises a solution consisting of waterborne epoxy resin, graphene and mixed resin, and the corrosion-resistant insulating solution comprises the following raw materials in parts by weight: water-based epoxy resin: 30 parts of graphene: 30 parts of mixed resin: 40 parts of the components.
The mixed resin comprises acrylic acid, hydroxyethyl ester, acrylamide, sodium allyl glycidyl sulfonate, vinyl acetate and sodium 2-allyl-2-methylpropanesulfonate.
By washing in the corrosion-resistant insulating solution, a layer of corrosion-resistant insulating film consisting of the water-based epoxy resin, the graphene and the mixed resin is formed on the surface of the plate, so that the plate can be effectively prevented from being corroded by the antifreezing solution, ions in the material can be prevented from diffusing to the cooling liquid due to the insulating property of the antifreezing solution, and the internal conductivity of the cooling liquid can be effectively reduced.
The heat radiating pipe 2 and the plate of the main plate 4 are respectively bent and are brazed together with the heat radiating belt 3 and the protective plate 1, and when the plate of the main plate 4 is bent, the processed surface is bent to be in contact with the coolant.
And after bending and welding, the step of air tightness detection is carried out, wherein in the step of air tightness detection, two ends of the core body formed by brazing are respectively communicated with a detection pipeline, a barometer is arranged on the detection pipeline, high-pressure gas is injected into the detection pipeline and then sealed, and whether the numerical value of the barometer changes or not is observed.
The detection pipeline is provided with connectors connected with the two ends of the core body, the connectors are attached to the edge of the mainboard at the end part of the core body, and a sealing gasket is arranged between the connectors and the mainboard, so that the two ends of the core body are hermetically connected with the detection pipeline.
And (2) washing the interior of the radiating pipe 2 of the core body formed by brazing by using a 50-100 ℃ corrosion-resistant solution for 3-10 min, then drying, and during drying, communicating one end of the core body with an air blowing pipeline, and blowing 50-100 ℃ air into the core body through the air blowing pipeline, thereby realizing drying.
The corrosion-resistant solution comprises sodium carbonate, sodium hydroxide and trisodium phosphate, the pH value of the corrosion-resistant solution is 7-10, and the corrosion-resistant solution comprises the following raw materials in parts by weight: 40 parts of sodium carbonate, sodium hydroxide: 20 parts, trisodium phosphate: 40 parts of the components.
And (2) washing the interior of the radiating pipe 2 of the core body formed by brazing by using a corrosion-resistant insulating solution at 50-300 ℃, wherein the washing time is 10-30 min, then drying, and during drying, communicating one end of the core body with an air blowing pipeline, and blowing 50-100 ℃ of air into the core body through the air blowing pipeline, thereby realizing drying.
The corrosion-resistant insulating solution comprises a solution consisting of waterborne epoxy resin, graphene and mixed resin, and the corrosion-resistant insulating solution comprises the following raw materials in parts by weight: water-based epoxy resin: 30 parts of graphene: 30 parts of mixed resin: 40 parts of mixed resin, wherein the mixed resin comprises acrylic acid, hydroxyethyl, acrylamide, sodium allyl glycidyl rice sulfonate, vinyl acetate and sodium 2-allyl acyl-2-methylpropanesulfonate.
The above description has been given for a tube-in-tube core, but the present invention is also applicable to a plate-fin core as shown in fig. 4.
Of course, the above description is not limited to the above examples, and the undescribed technical features of the present invention can be implemented by or using the prior art, and will not be described herein again; the above embodiments and drawings are only for illustrating the technical solutions of the present invention and not for limiting the present invention, and the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that changes, modifications, additions or substitutions within the spirit and scope of the present invention may be made by those skilled in the art without departing from the spirit of the present invention, and shall also fall within the scope of the claims of the present invention.
Claims (5)
1. A processing technology of a low-conductivity core body for a fuel cell is characterized in that: the method comprises the following steps: a. placing the plate for processing the main plate into a corrosion-resistant solution at 50-100 ℃ for washing for 3-10 min, washing only one surface during washing, and then drying, wherein the corrosion-resistant solution comprises sodium carbonate, sodium hydroxide and trisodium phosphate, the pH value of the corrosion-resistant solution is 7-10, and the corrosion-resistant solution comprises the following raw materials in parts by weight: 30-50 parts of sodium carbonate, sodium hydroxide: 10-30 parts of trisodium phosphate: 30-50 parts of a solvent;
b. the plate material treated by the corrosion-resistant solution is placed into the corrosion-resistant insulating solution at 50-300 ℃ to be washed for 10-30 min, the surface washed by the corrosion-resistant solution is only washed during washing, then the plate material is dried, the corrosion-resistant insulating solution comprises a solution formed by water-based epoxy resin, graphene and mixed resin, and the corrosion-resistant insulating solution comprises the following raw materials in parts by weight: water-based epoxy resin: 20-40 parts of graphene: 20-40 parts of mixed resin: 30-50 parts of mixed resin, wherein the mixed resin comprises acrylic acid, hydroxyethyl, acrylamide, sodium allyl glycidyl rice sulfonate, vinyl acetate and sodium 2-allyl-2-methylpropanesulfonate;
c. bending the radiating pipe (2) and the plate of the main board (4) respectively, and brazing and molding the plates together with the radiating belt (3) and the protective plate (1), wherein when the plate of the main board (4) is bent, the processed surface is bent into a surface contacting with the cooling liquid;
d. washing the interior of a radiating pipe (2) of a core body formed by brazing by using a corrosion-resistant solution with the temperature of 50-100 ℃, wherein the washing time is 3-10 min, and then drying, wherein the corrosion-resistant solution comprises sodium carbonate, sodium hydroxide and trisodium phosphate, the pH value of the corrosion-resistant solution is 7-10, and the corrosion-resistant solution comprises the following raw materials in parts by weight: 30-50 parts of sodium carbonate, sodium hydroxide: 10-30 parts of trisodium phosphate: 30-50 parts of a solvent;
e. the method comprises the following steps of washing the inside of a radiating pipe (2) of a core body formed by brazing with a corrosion-resistant insulating solution at the temperature of 50-300 ℃, wherein the washing time is 10-30 min, and then drying the radiating pipe, wherein the corrosion-resistant insulating solution comprises a solution formed by water-based epoxy resin, graphene and mixed resin, and the corrosion-resistant insulating solution comprises the following raw materials in parts by weight: water-based epoxy resin: 20-40 parts of graphene: 20-40 parts of mixed resin: 30-50 parts of mixed resin, wherein the mixed resin comprises acrylic acid, hydroxyethyl, acrylamide, sodium allyl glycidyl rice sulfonate, vinyl acetate and sodium 2-allyl-2-methylpropanesulfonate.
2. The process of claim 2, wherein the low conductivity core for a fuel cell comprises: and (c) marking the washed surface after the step a is completed.
3. The process of claim 2, wherein the low conductivity core for a fuel cell comprises: and c, an air tightness detection procedure arranged between the step c and the step d is further included, the air tightness detection procedure is that two ends of the core body formed by brazing are respectively communicated with detection pipelines, a barometer is arranged on each detection pipeline, high-pressure gas is injected into each detection pipeline and then sealed, and whether the numerical value of the barometer changes or not is observed.
4. The process of claim 2, wherein the low conductivity core for a fuel cell comprises: and d, performing drying operation in the steps d and e, namely communicating one end of the core body with an air blowing pipeline, and blowing 50-100 ℃ air into the core body through the air blowing pipeline, so as to realize drying.
5. The utility model provides a low conductivity core for fuel cell, includes cooling tube (2), heat dissipation area (3), mainboard (4) and backplate (1), its characterized in that: the inner wall of the radiating pipe (2) and the surface, in contact with the cooling liquid, of the main board (4) are provided with a corrosion-resistant layer and a corrosion-resistant insulating layer from inside to outside, the corrosion-resistant layer comprises a compact oxide film formed by alumina, the corrosion-resistant insulating layer comprises a corrosion-resistant insulating film formed by water-based epoxy resin, graphene and mixed resin, and the mixed resin comprises acrylic acid, hydroxyethyl, acrylamide, sodium allyl glycidyl sulfonate, vinyl acetate and 2-allyl-2-methyl sodium propane sulfonate.
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| CN202010138763.8A CN111342078B (en) | 2020-03-03 | 2020-03-03 | Low-conductivity core body for fuel cell and processing technology |
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| CN202010138763.8A CN111342078B (en) | 2020-03-03 | 2020-03-03 | Low-conductivity core body for fuel cell and processing technology |
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| CN111342078B CN111342078B (en) | 2022-06-07 |
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| CN209840775U (en) * | 2019-01-29 | 2019-12-24 | 扬州中德汽车零部件有限公司 | Special water-air intercooler for low-conductivity fuel cell |
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| US6478078B1 (en) * | 1999-09-28 | 2002-11-12 | Calsonic Kansei Corporation | Heat exchanger for cooling circulating water of fuel cells & process for producing same |
| JP2005183015A (en) * | 2003-12-16 | 2005-07-07 | Calsonic Kansei Corp | Fuel cell cooling system and coating agent used for the same |
| CN101170182A (en) * | 2006-10-25 | 2008-04-30 | 新源动力股份有限公司 | A surface processing method for proton exchange film fuel battery group aluminum alloy terminal board |
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| CN202361842U (en) * | 2011-08-02 | 2012-08-01 | 熊金辉 | Assembled polymer material radiator |
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| CN104716362A (en) * | 2013-12-15 | 2015-06-17 | 中国科学院大连化学物理研究所 | Honeycomb metal-based pipe belt type heat exchanger and application thereof |
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| Publication number | Publication date |
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| CN111342078B (en) | 2022-06-07 |
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