CN102581487A - 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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- CN102581487A CN102581487A CN2012100349441A CN201210034944A CN102581487A CN 102581487 A CN102581487 A CN 102581487A CN 2012100349441 A CN2012100349441 A CN 2012100349441A CN 201210034944 A CN201210034944 A CN 201210034944A CN 102581487 A CN102581487 A CN 102581487A
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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 glue soldering method of fuel battery double plates.
Background technology
Fuel cell (FC) is a kind of electrochemical principle that utilizes, and will be present in the TRT that chemical energy in fuel and the oxidant is converted into electric energy.It has the energy conversion efficiency height, and pernicious gas, noise emissions are low, and the reliability advantages of higher 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, simple in structure, easy to operate, be suitable for realizing advantage such as the miniaturization of products, thereby becomes the focus that receives much attention in the 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, in fuel cell, plays the effect of collected current, gas distribution and water management, heat management, and its weight accounts for more than 80% of pile gross weight, and manufacturing cost accounts for about 30% of totle drilling cost.Under the prior art, bipolar plates is generally processed by materials such as graphite or metals.Advantages such as graphite bi-polar plate has the conductance height, and is corrosion-resistant, and density is low, but graphitic embrittlement is big, machining property is relatively poor, is difficult to produce in enormous quantities, and cost is higher.Metal double polar plates has good electrical conductivity, thermal conductivity and processing characteristics, thereby can be processed into the volume and weight that plate as thin as a wafer reduces bipolar plates greatly.In addition, its low processing cost is prone to realize large-scale production.Though the metal current bipolar plates still must solve corrosion resistant problem, along with the continuous development of anti-corrosion of metal technology, metal double polar plates remains the very promising developing direction of fuel cell field.
At present, the manufacturing of metal double polar plates generally is to process anode and cathode flow field plate respectively with sheet metal (thickness is less than 0.2mm) earlier, 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, resistance welded, Laser Welding etc.
Through the document search, U.S. Patent number: US 6,942,941, name is called: the gluing connection of metal double polar plates (Adhesive bonds for metallic bipolar plates), this method mainly is: use the conductive adhesive metal double polar plates, afterwards hot setting.The core of this invention is to adopt conducting resinl to connect; Though can control the distortion of hot input quantity and bipolar plates, the bipolar plates abutting edge is in fuel cell environment, and poor, the easy generation of heat-resisting quantity worn out; Be difficult to guarantee long-time reliable connection of bipolar plates, be prone to form cooling fluid and reveal.
Through document search, U.S. Patent number: US 7,009; 136; Name is called: a kind of pole plate assembly method (Method of fabricating a bipolar plate assembly), and this method mainly is: cooling agent one side of anode unipolar plate and negative electrode unipolar plate is fitted, coolant channel is evacuated; Two-plate fits tightly under gas pressure, forms metal double polar plates through laser weld afterwards.This characteristic feature of an invention is: adopt laser weld, weld strength is high, and is corrosion-resistant; Fitting tight, no gap has guaranteed laser weld stability; But the bipolar plates quality of connection relies on the vacuum of cooling duct, adopts the complicated vacuum of this arts demand, causes production efficiency low, and production cost is higher.
Summary of the invention
The object of the invention is exactly for the defective that overcomes above-mentioned prior art existence a kind of laser glue soldering method that can improve Laser Welding Quality, connection reliability height, be convenient to the fuel battery double plates of large-scale production to be provided.
The object of the invention can be realized through following technical scheme: a kind of laser glue soldering method of fuel battery double plates; This method is that adhesion process is connected in fuel battery double plates with the laser welding process application in conjunction; Promptly use normal temperature cure glue that the fuel battery double plates welding region is bonding, carry out the connection that laser weld is accomplished fuel battery double plates afterwards.
The gluing width range 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, protection throughput 2-10L/min, but parameter is not limited only to this, can adjust according to material, thickness of slab, type of laser.
Also be used weld jig in the 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) compare with splicing, pressure welding, the present invention adopts laser weld, and the weld seam mechanical strength of laser weld is big, good corrosion resistance, and connection reliability is high.
(2) the conventional laser welding will adopt weld jig that metal double polar plates is carried out clamping, and pole plate runner, weld jig, this three of path of welding must accurately cooperate in assembling process, in case the fit-up gap occurs, then can cause the fluctuation of Laser Welding Quality; Compare with the conventional laser welding, the present invention glueds joint metal double polar plates, has guaranteed closely cooperating of upper/lower layer metallic pole plate, can effectively improve the stability and the quality of laser weld.
(3) generally glued joint with the connection bearing structure of glue-line as metal double polar plates, glue-line need accurate distribution in the access path place, need carry out hot setting behind the gluing, the glue-line corrosion-resistant, be prone to agingly, cause the metal double polar plates connection reliability low; And the present invention adopts is normal temperature cure glue, need not hot setting, has reduced hot input; Technical process is simple, and the structure glue among the present invention is volatilized by pyrolytic in laser beam welding, can not stop up runner; Compare with the tradition splicing, accurately less demanding to glue-line coating position.
(4) splicing among the present invention can be used with the method for utilizing the weld jig clamping; Adopt splicing in the complex structure zone; General welding region adopts the anchor clamps clamping, simplifies design of welding jig, makes a sleeve clamp can weld the metal double polar plates of different designs scheme.
Description of drawings
Fig. 1 is a kind of structural representation of fuel battery metal double polar plate;
Fig. 2 is an A-A profile among Fig. 1;
Fig. 3 is the structural representation of another kind of fuel battery metal double polar plate;
Fig. 4 is an A-A profile among Fig. 3;
Fig. 5 is a B-B profile among Fig. 3.
The specific embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is elaborated.
Embodiment 1
Shown in Fig. 1-2; A kind of fuel cell thin metal bipolar plates; Comprise metal unipolar plate 1a, metal unipolar 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 the joints that splice of double-level-metal thin plate.
The concrete course of work of the laser glue soldering method of above-mentioned fuel cell thin metal bipolar plates is: at first normal temperature cure glue is coated on path of welding 2 places on metal unipolar plate 1a, the metal unipolar plate 1b contact-making surface; Form glue-line 5; The width of glue-line 5 is 0.5mm, and bondline thickness is 0.05mm; With weld jig 6 metal unipolar plate 1a, metal unipolar plate 1b are located, compress then; Through laser weld thermal source 4, forming a solder realizes fine and close continuously welding, and the technological parameter of laser weld is: laser power is 100W, and speed of welding is 30mm/s, protection throughput 2L/min.
Above-mentioned laser weld be with the high-intensity laser beam radiation to the metal surface, through the interaction of laser and metal, make welding point 3 places metal moltens form weld seam.The form of the welding point 3 of metal double polar plates is the joint that splices.High energy laser beam is radiated at the upper strata polar board surface, makes metal polar plate melt rapidly, sink, and heat constantly transmits downwards, and the fusing of lower metal pole plate is solidified the back and formed weld seam, and the levels pole plate is closely connected.
The advantage of this instance is: path of welding 2 places do not have anchor clamps and disturb, and are convenient to path design and laser positioning.Weld jig 6 is the anchor clamps that are used for fixing metal double polar plates in the laser weld, only plays location and fixing effect, need not to consider and the cooperating of runner, and is simple in structure.Same set of weld jig can be applicable to the pole plate of different runner design forms through selecting different gluing positions.In addition, this technology to gluing require low, simple and easy to do.Easily be automated, be applicable to large-scale production.
Shown in Fig. 3-5; A kind of fuel cell thin metal bipolar plates; Comprise metal unipolar plate 1a, metal unipolar 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.On the path of welding, the intersectional region in multistage path, the zone of path zig zag, the zone of clamping power maldistribution, the weld clip that closes on have the path of welding of wearing and tearing, but also are not limited only to above-mentioned zone path of welding 2a often; 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 the joints that splice of double-level-metal thin plate.
The concrete course of work of the laser glue soldering method of above-mentioned fuel cell thin metal bipolar plates is: at first normal temperature cure glue is coated on the path of welding 2a place on metal unipolar plate 1a, the metal unipolar plate 1b contact-making surface; Form glue-line 5; The width of glue-line 5 is 1mm, and bondline thickness is 0.1mm; With weld jig 6 metal unipolar plate 1a, metal unipolar plate 1b are located, compress then; Adopt laser weld thermal source 4, when thermal source moved to path of welding 2a, the laser glue welder of the employing parameter of planting is: laser power was 300W; Speed of welding is 800mm/s; Protection throughput 10L/min when thermal source moves to welding machine path 2b, adopts the technological parameter that is applicable to general laser weld; A welding fabrication is realized fine and close continuously welding.
The advantage of this instance is: when causing the fit-up gap to be difficult to control owing to reasons such as wearing and tearing, path of welding complicacy appear in clamping power skewness, weld jig 6; When welding quality is unstable; Can be in the gap frequent appearance place gluing; Need not to change original weld jig and path of welding like this, also can realize high quality welding.
Claims (7)
1. the laser glue soldering method of a fuel battery double plates; It is characterized in that; This method is that adhesion process is connected in fuel battery double plates with the laser welding process application in conjunction; Promptly use normal temperature cure glue that the fuel battery double plates welding region is bonding, carry out the connection that laser weld is accomplished fuel battery double plates afterwards.
2. the laser glue soldering method of a kind of fuel battery double plates according to claim 1 is characterized in that, the gluing width range of described normal temperature cure glue is 0.5mm-1mm, and bondline thickness is 0.05-0.1mm.
3. the laser glue soldering method of a kind of fuel battery double plates according to claim 1 and 2 is characterized in that, described normal temperature cure glue comprises epoxy resin structure glue or epoxy resin conducting resinl.
4. the laser glue soldering method of a kind of fuel battery double plates according to claim 1 is characterized in that the thermal source of described laser weld comprises CO
2Laser, YAG laser or optical-fiber laser.
5. according to the laser glue soldering method of claim 1 or 4 described a kind of fuel battery double plates; It is characterized in that; The technological parameter of described laser weld is: laser power is 100W-300W, and speed of welding is 30mm/s-800mm/s, protection throughput 2-10L/min.
6. according to the laser glue soldering method of claim 1 or 4 described a kind of fuel battery double plates, it is characterized in that, also be used weld jig in the described laser beam welding.
7. the laser glue soldering 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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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103878524A (en) * | 2014-03-28 | 2014-06-25 | 上海交通大学 | Multi-section clamping self-adaptation laser welding clamp for ultrathin metal bipolar plate |
| JP2017127891A (en) * | 2016-01-21 | 2017-07-27 | 本田技研工業株式会社 | Laser welding apparatus and laser welding method |
| CN107335914A (en) * | 2017-05-19 | 2017-11-10 | 大族激光科技产业集团股份有限公司 | The welding method of electrokinetic cell 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 |
| CN108637476A (en) * | 2018-04-28 | 2018-10-12 | 上海治臻新能源装备有限公司 | The laser welding electromagnetic adsorption clamping device and processing method of fuel battery double plates |
| CN108666071A (en) * | 2018-03-16 | 2018-10-16 | 镇江宏联电工有限公司 | A kind of lead output reactance device and encapsulating method |
| CN109827645A (en) * | 2018-12-26 | 2019-05-31 | 江苏日托光伏科技股份有限公司 | A kind of MWT component conducting resinl quota test method |
| 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 |
| CN109877452A (en) * | 2019-03-13 | 2019-06-14 | 北京新研创能科技有限公司 | A kind of welding method for fuel battery metal double polar plate |
| CN109935842A (en) * | 2019-04-01 | 2019-06-25 | 中自环保科技股份有限公司 | A kind of metal double polar plates and assemble method of fuel cell pile |
| CN110380074A (en) * | 2019-07-24 | 2019-10-25 | 中国华能集团清洁能源技术研究院有限公司 | A kind of preparation method of the light-duty bipolar plates of molten carbonate fuel cell |
| CN112570866A (en) * | 2020-11-18 | 2021-03-30 | 上海治臻新能源装备有限公司 | Rolling type resistance welding device for metal bipolar plate and processing method |
| CN113001085A (en) * | 2021-03-08 | 2021-06-22 | 上海田枫实业有限公司 | Sheet layer assembly fixture of freeze dryer |
| CN114535935A (en) * | 2022-02-23 | 2022-05-27 | 上海涵鲲科技有限公司 | Metal edge sealing of fan blade and processing method thereof |
| CN114871081A (en) * | 2022-06-02 | 2022-08-09 | 福耀玻璃工业集团股份有限公司 | Preparation method of conductive adhesive layer, preparation method of dimming assembly and preparation method of dimming glass |
| CN115647627A (en) * | 2022-12-26 | 2023-01-31 | 适新科技（苏州）有限公司 | Flexible feeding device for welding bipolar plate of hydrogen fuel cell |
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| CN103878524A (en) * | 2014-03-28 | 2014-06-25 | 上海交通大学 | Multi-section clamping self-adaptation laser welding clamp for ultrathin metal bipolar plate |
| 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 |
| JP2017127891A (en) * | 2016-01-21 | 2017-07-27 | 本田技研工業株式会社 | Laser welding apparatus and laser welding method |
| CN107335914A (en) * | 2017-05-19 | 2017-11-10 | 大族激光科技产业集团股份有限公司 | The welding method of electrokinetic cell and its sealing nail |
| 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 |
| CN108666071A (en) * | 2018-03-16 | 2018-10-16 | 镇江宏联电工有限公司 | A kind of lead output reactance device and encapsulating method |
| CN108637476A (en) * | 2018-04-28 | 2018-10-12 | 上海治臻新能源装备有限公司 | The laser welding electromagnetic adsorption clamping device and processing method of fuel battery double plates |
| CN109827645A (en) * | 2018-12-26 | 2019-05-31 | 江苏日托光伏科技股份有限公司 | A kind of MWT component conducting resinl quota test method |
| CN109877452A (en) * | 2019-03-13 | 2019-06-14 | 北京新研创能科技有限公司 | A kind of welding method for fuel battery metal double polar plate |
| 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 |
| CN109935842A (en) * | 2019-04-01 | 2019-06-25 | 中自环保科技股份有限公司 | A kind of metal double polar plates and assemble method of fuel cell pile |
| 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 |
| CN110380074A (en) * | 2019-07-24 | 2019-10-25 | 中国华能集团清洁能源技术研究院有限公司 | A kind of preparation method of the light-duty bipolar plates of molten carbonate fuel cell |
| CN112570866A (en) * | 2020-11-18 | 2021-03-30 | 上海治臻新能源装备有限公司 | Rolling type resistance welding device for metal bipolar plate and processing method |
| CN112570866B (en) * | 2020-11-18 | 2024-03-12 | 上海治臻新能源股份有限公司 | Rolling type resistance welding device and processing method for metal bipolar plate |
| CN113001085A (en) * | 2021-03-08 | 2021-06-22 | 上海田枫实业有限公司 | Sheet layer assembly fixture of freeze dryer |
| CN114535935A (en) * | 2022-02-23 | 2022-05-27 | 上海涵鲲科技有限公司 | Metal edge sealing of fan blade and processing method thereof |
| CN114871081A (en) * | 2022-06-02 | 2022-08-09 | 福耀玻璃工业集团股份有限公司 | Preparation method of conductive adhesive layer, preparation method of dimming assembly and preparation method of dimming glass |
| CN115647627A (en) * | 2022-12-26 | 2023-01-31 | 适新科技（苏州）有限公司 | Flexible feeding device for welding bipolar plate of hydrogen fuel cell |
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