CN102581487B - Laser weld-bonding method of bipolar plate of fuel cell - Google Patents
Laser weld-bonding method of bipolar plate of fuel cell Download PDFInfo
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- CN102581487B CN102581487B CN201210034944.1A CN201210034944A CN102581487B CN 102581487 B CN102581487 B CN 102581487B CN 201210034944 A CN201210034944 A CN 201210034944A CN 102581487 B CN102581487 B CN 102581487B
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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
Abstract
The invention relates to a laser weld-bonding method of bipolar plates of a fuel cell. The method combines a bonding process and a laser welding process to connect the bipolar plates of the fuel cell, namely a normal-temperature curing adhesive is used to bond welding areas of the bipolar plates of the fuel cell, and then the laser welding is carried out to finish the connection of the bipolar plates of the fuel cell. Compared with the prior art, the laser weld-bonding method has the advantages that: because an adhesive bonding method is adopted to bond the bipolar plates of the fuel cell tightly, the phenomenas of sealing-off and welding seam breakage caused by assembling gaps in the laser welding are eliminated, the laser welding quality is improved, and the welding seam is high in mechanical strength and is corrosion resistant; a bond layer can evaporate rapidly under the high-heat input of a laser beam, the requirement of the bonding position is reduced; because the normal-temperature curing adhesive is adopted, the secondary heat input caused by high-temperature curing is avoided; and due to the introduction of the bonding process, the designs of a welding clamp, a welding path and welding parameters can be more flexible and simpler, so that the laser weld-bonding method is easy in large-scale production.
Description
Technical field
The present invention relates to a kind of fuel battery double plates method of attachment, especially relate to a kind of laser weld-bonding method of fuel battery double plates.
Background technology
Fuel cell (FC) is that one utilizes electrochemical principle, the chemical energy be present in fuel and oxidant is converted into the TRT of electric energy.It is high that it has energy conversion efficiency, and pernicious gas, noise emissions are low, high reliability, is universally acknowledged promising new-generation technology.Proton Exchange Membrane Fuel Cells (PEMFC) is except the advantage of general fuel cell, also have operating temperature low, start fast, specific power is high, structure is simple, easy to operate, be suitable for realizing the advantages such as the miniaturization of products, thus become the focus received much attention in research field.
The structure of Proton Exchange Membrane Fuel Cells mainly comprises bipolar plates, PEM, catalyst etc.Wherein bipolar plates is an important multifunctional module, play collected current in a fuel cell, gas distributes and water management, heat management effect, its weight accounts for more than 80% of pile gross weight, and manufacturing cost accounts for about 30% of totle drilling cost.Under prior art, bipolar plates is generally made up of the material such as graphite or metal.The advantages such as it is high that graphite bi-polar plate has conductance, corrosion-resistant, and density is low, but graphitic embrittlement is comparatively large, machining property is poor, is difficult to produce in enormous quantities, high expensive.Metal double polar plates has good electric conductivity, thermal conductivity and processing characteristics, can be processed into very thin plate thus greatly reduce the volume and weight of bipolar plates.In addition, its low processing cost, easily realizes large-scale production.Although metal current bipolar plates still must solve corrosion resistant problem, along with the development of anti-corrosion of metal technology, metal double polar plates remains the very promising developing direction of fuel cell field.
At present, the manufacture of metal double polar plates is generally first use sheet metal (thickness is less than 0.2mm) to make anode and cathode flow field plate respectively, then the two is linked together, and forms cooling liquid flowing channel in the middle of two plates.At present, the method that bipolar plates connects generally has bonding, electric resistance welding, Laser Welding etc.
Through literature search, U.S. Patent number: US 6,942,941, name be called: the gluing connection of metal double polar plates (Adhesive bonds for metallic bipolar plates), the method mainly: use conductive adhesive metal double polar plates, afterwards hot setting.The core of this invention adopts conducting resinl to connect, although can control heat input and bipolar plates distortion, bipolar plates abutting edge is in fuel cell environment, and heat-resisting quantity is poor, easily generation is aging, be difficult to ensure that bipolar plates reliably connects for a long time, easily form cooling fluid and reveal.
Through literature search, U.S. Patent number: US 7,009,136, name be called: a kind of pole plate assembly method (Methodof fabricating a bipolar plate assembly), the method mainly: fitted in the cooling agent side of anode unipolar plate and negative electrode unipolar plate, coolant channel be evacuated, under gas pressure, two-plate fits tightly, and forms metal double polar plates afterwards by laser weld.This characteristic feature of an invention is: adopt laser weld, weld strength is high, corrosion-resistant; Fitting tight, gapless, ensure that laser weld stability; But bipolar plates quality of connection relies on the vacuum of cooling duct, adopt this technique to need complicated vacuum, cause production efficiency low, production cost is higher.
Summary of the invention
Object of the present invention is exactly provide a kind of can improve that Laser Welding Quality, connection reliability are high, the laser weld-bonding method of the fuel battery double plates of being convenient to large-scale production to overcome defect that above-mentioned prior art exists.
Object of the present invention can be achieved through the following technical solutions: a kind of laser weld-bonding method of fuel battery double plates, the method adhesion process and laser welding process is combined to be applied to fuel battery double plates and to be connected, namely use normal temperature cure glue by bonding for fuel battery double plates welding region, carry out the connection that laser weld completes fuel battery double plates afterwards.
The spreading width scope of described normal temperature cure glue is 0.5mm-1mm, and bondline thickness is 0.05-0.1mm, but is not limited only to this size, can adjust according to joint arrangement, thickness of slab, laser spot diameter.
Described normal temperature cure glue comprises epoxy resin structure glue or epoxy resin conducting resinl, but is not limited only to this type of glue.
The thermal source of described laser weld comprises CO
2laser, YAG laser or optical-fiber laser, but do not limit and above-mentioned laser.
The technological parameter of described laser weld is: laser power is 100W-300W, and speed of welding is 30mm/s-800mm/s, shielding gas flow amount 2-10L/min, but parameter is not limited only to this, can adjust according to material, thickness of slab, type of laser.
Also with the use of weld jig in described laser beam welding.
Described bipolar plates comprises metal double polar plates or other thin plates.
Compared with prior art, the present invention has the following advantages:
(1) compared with splicing, pressure welding, the present invention adopts laser weld, and the weld joint mechanical intensity of laser weld is large, and good corrosion resistance, connection reliability is high.
(2) conventional laser welding will adopt weld jig to carry out clamping to metal double polar plates, this three of polar plate flow passage, weld jig, path of welding is necessary precise match in assembling process, once there is fit-up gap, then can cause the fluctuation of Laser Welding Quality; Weld with conventional laser and compare, metal double polar plates glueds joint by the present invention, ensure that closely cooperating of upper/lower layer metallic pole plate, effectively can improve stability and the quality of laser weld.
(3) general splicing connects bearing structure with glue-line as metal double polar plates, glue-line need accurate distribution in access path place, need after gluing to carry out hot setting, glue-line corrosion-resistant, easily aging, cause metal double polar plates connection reliability low; And the present invention's employing is normal temperature cure glue, without the need to hot setting, decrease heat input, technical process is simple, and the structure glue in the present invention is volatilized by pyrolytic in laser beam welding, can not block runner, compared with glueing joint with tradition, not high to glue-line coating position exact requirements.
(4) splicing in the present invention can with utilize the method for weld jig clamping with the use of, adopt in complex structure region and glued joint, general welding region adopts fixture clamping, simplifies design of welding jig, makes a sleeve clamp can weld the metal double polar plates of different designs scheme.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of fuel battery metal double polar plate;
Fig. 2 is A-A profile in Fig. 1;
Fig. 3 is the structural representation of another kind of fuel battery metal double polar plate;
Fig. 4 is A-A profile in Fig. 3;
Fig. 5 is B-B profile in Fig. 3.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment 1
As shown in Figure 1-2, a kind of fuel cell thin metal bipolar plates, comprise metal monopole plate 1a, metal monopole plate 1b, path of welding 2 and welding point 3, wherein, described path of welding 2 is thermal source motion tracks of fuel cell metal double polar plates seal request design, and welding point 3 is bonded lap joints of bi-layer metal laminate.
The specific works process of the laser weld-bonding method of above-mentioned fuel cell thin metal bipolar plates is: first normal temperature cure glue is coated on path of welding 2 place on metal monopole plate 1a, metal monopole plate 1b contact surface, form glue-line 5, the width of glue-line 5 is 0.5mm, and bondline thickness is 0.05mm; Then metal monopole plate 1a, metal monopole plate 1b are located with weld jig 6, compresses; By laser weld thermal source 4, forming a solder, realize welding fine and close continuously, the technological parameter of laser weld is: laser power is 100W, and speed of welding is 30mm/s, shielding gas flow amount 2L/min.
Above-mentioned laser weld is that high-intensity laser beam is radiated to metal surface, by the interaction of laser and metal, makes welding point 3 place metal molten form weld seam.The form of the welding point 3 of metal double polar plates is bonded lap joints.High energy laser beam is radiated at upper strata polar board surface, and metal polar plate is melted rapidly, sink, the continuous going down of heat, lower metal pole plate melts, and solidifies rear formation weld seam, makes levels pole plate compact siro spinning technology.
The advantage of this example is: path of welding 2 place disturbs without fixture, is convenient to path design and laser positioning.Weld jig 6 is the fixtures for fixing metal bipolar plates in laser weld, only plays location and fixing effect, and without the need to considering and the coordinating of runner, structure is simple.Same set of weld jig, by selecting different glue sites, is applicable to the pole plate of different runner design form.In addition, the requirement of this technique to gluing is low, simple and easy to do.Easily be automated, be applicable to large-scale production.
Embodiment 2
As in Figure 3-5, a kind of fuel cell thin metal bipolar plates, comprise metal monopole plate 1a, metal monopole plate 1b, path of welding 2a, path of welding 2b and welding point 3, wherein, the thermal source motion track of described path of welding 2a fuel cell metal double polar plates seal request design, path of welding gluing.Path of welding 2a is often on path of welding, and the region of the intersectional region in multistage path, the region of path zig zag, clamping power maldistribution, the weld clip closed on have the path of welding of wearing and tearing, but are also not limited only to above-mentioned zone; Described path of welding 2b is the thermal source motion track of fuel cell metal double polar plates seal request design, and path of welding is gluing not; Welding point 3 is bonded lap joints of bi-layer metal laminate.
The specific works process of the laser weld-bonding method of above-mentioned fuel cell thin metal bipolar plates is: first normal temperature cure glue is coated on the path of welding 2a place on metal monopole plate 1a, metal monopole plate 1b contact surface, form glue-line 5, the width of glue-line 5 is 1mm, and bondline thickness is 0.1mm; Then metal monopole plate 1a, metal monopole plate 1b are located with weld jig 6, compresses; Adopt laser weld thermal source 4; when thermal source moves to path of welding 2a; the laser glue Welding parameter adopted is: laser power is 300W; speed of welding is 800mm/s; shielding gas flow amount 10L/min, when thermal source moves to welding machine path 2b, adopts the technological parameter being applicable to general laser weld; a welding fabrication, realizes welding fine and close continuously.
The advantage of this example is: when occurring that the reason such as wearing and tearing, path of welding complexity causes fit-up gap to be difficult to control due to clamping power skewness, weld jig 6, when welding quality is unstable, can in gap frequent appearance place gluing, like this without the need to changing original weld jig and path of welding, also high-quality welding can be realized.
Claims (3)
1. the laser weld-bonding method of a fuel battery double plates, it is characterized in that, the method adhesion process and laser welding process is combined to be applied to fuel battery double plates and to be connected, namely use normal temperature cure glue by bonding for fuel battery double plates welding region, carry out the connection that laser weld completes fuel battery double plates afterwards;
The spreading width scope of described normal temperature cure glue is 0.5mm-1mm, and bondline thickness is 0.05-0.1mm;
The technological parameter of described laser weld is: laser power is 100W-300W, and speed of welding is 30mm/s-800mm/s, shielding gas flow amount 2-10L/min;
The thickness of described bipolar plates is less than 0.2mm.
2. the laser weld-bonding method of a kind of fuel battery double plates according to claim 1, is characterized in that, also with the use of weld jig in described laser beam welding.
3. the laser weld-bonding method of a kind of fuel battery double plates according to claim 1, is characterized in that, described bipolar plates comprises metal double polar plates.
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| CN201210034944.1A CN102581487B (en) | 2012-02-16 | 2012-02-16 | Laser weld-bonding method of bipolar plate of fuel cell |
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| CN201210034944.1A CN102581487B (en) | 2012-02-16 | 2012-02-16 | Laser weld-bonding method of bipolar plate of fuel cell |
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| CN102581487B true CN102581487B (en) | 2015-03-04 |
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| CN103878524B (en) * | 2014-03-28 | 2016-02-10 | 上海交通大学 | A kind of ultra-thin metal bipolar plate multistage clamping self adaptation fixture for laser welding |
| JP6209627B2 (en) * | 2016-01-21 | 2017-10-04 | 本田技研工業株式会社 | Laser welding apparatus and laser welding method |
| CN107335914B (en) * | 2017-05-19 | 2019-05-10 | 大族激光科技产业集团股份有限公司 | The welding method of power battery and its sealing nail |
| CN107732070A (en) * | 2017-10-13 | 2018-02-23 | 华霆（合肥）动力技术有限公司 | Battery modules and assemble method |
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| CN108637476B (en) * | 2018-04-28 | 2022-03-15 | 上海治臻新能源股份有限公司 | Laser welding electromagnetic adsorption clamping device of fuel cell bipolar plate and processing method |
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| CN109877452B (en) * | 2019-03-13 | 2021-03-23 | 北京新研创能科技有限公司 | Welding method for metal bipolar plate of fuel cell |
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| CN109877457A (en) * | 2019-04-04 | 2019-06-14 | 武汉华工激光工程有限责任公司 | A kind of seal weld method of the large format bipolar plates of fuel cell |
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| CN113001085B (en) * | 2021-03-08 | 2022-08-16 | 上海田枫实业有限公司 | Sheet layer assembly fixture of freeze dryer |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| FR2815278B1 (en) * | 2000-10-16 | 2003-01-17 | Renault | WELDING-BONDING DEVICE AND METHOD FOR RIGIDLY JOINING METAL SHEETS |
| DE10053789B4 (en) * | 2000-10-30 | 2009-11-26 | Volkswagen Ag | Laser welding |
| US8089027B2 (en) * | 2004-05-11 | 2012-01-03 | GM Global Technology Operations LLC | Laser welding of conductive coated metallic bipolar plates |
| CN100409995C (en) * | 2004-12-14 | 2008-08-13 | 大连理工大学 | Glue welding connection method |
| JP5248344B2 (en) * | 2009-01-20 | 2013-07-31 | 本田技研工業株式会社 | Laser welding method |
| CN102126086B (en) * | 2011-01-12 | 2014-02-19 | 哈尔滨工业大学 | Laser weld-bonding method |
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