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Fuel cell (fuel cell) technology solutions is currently the most promising energy, which greatly affect the energy shortage and global warming and other issues.  Fuel batteries provide clean energy can be used for cars environmentally friendly, can be widely applied to space, marine, energy, chemistry, manufacturing, pharmaceutical and electronics and many other industries.

 

The world has recognized the enormous potential of this technology. In 2003, President Bush launched the creation of a hydrogen fuel to start the fund, so far the U.S. government has invested over 180 million dollars to support research and development of cell technology fuel. sony vgp-bps9a/b battery  More Honda, Hyundai and other companies to start-up private funds, the investment of the nation in this technology has more than 280 million U.S. dollars.

 

To play the greatest potential of fuel cells, the key is to be in the next 5-10 years, production at commercial scale. In 2002, the fuel cell power output typical electricity cost per kilowatt in 1000 dollars. To be able to compete with other technologies, the manufacturing costs of fuel cells should be considerably reduced.

 

Manufacture of fuel batteries  

 

Fuel cell is a device for electrochemical energy conversion, which uses an external add fuel (anode) and oxidant (cathode) to generate electricity. This electrochemical reaction performed in the electrolyte and produce energy.

 

Is usually generated by a unit value of the fuel cell voltage is below 1V, so in practical applications is usually the whole series of them stacked together to obtain the required voltage. A fuel battery  type is generally formed by a number of stainless steel sheets, these sheets to be welded together to form a fuel cell stack as shown.

 

Stretching into the fuel cell

 

Happy soldering to maximize functional space of the battery and makes each individual mini-metal strain to control the deformation of the fuel cell stack.

 

Currently, the process of manufacturing fuel cells, welding metal plate is the most time consumption process: mass of fuel cells each metal plate are necessary for the weld length of 1 meter, while the length each solder is environmentally friendly vehicles to reach about 400 meters. Optimization of welding technology saves the cost of manufacturing fuel cells.

 

The problems here can be attributed to the traditional technology of laser welding is difficult to produce a reasonable rate of small, clean and reliable welding. To answer these questions, the traditional fuel, airframe manufacturers are concerned about technology fiber laser welding.

 

Seal welding economy

 

Compared to other techniques of laser welding, laser welding fiber major advantage is that the beam quality, energy production and power stability are the high power density and control a greater extent, and reduce the cost Total property. Fiber laser beam of high quality, so a small beam focal point, the corresponding energy density is also high. This can be very rapid, effective treatment, allowing the large-depth ratio of the width of the weld. Compared to other laser sources, fiber lasers can be much smaller in terms of welding heat input, welded metal plate so that the greater the distortion.  toshiba pa3191u-1bas battery The stability of high-energy laser fiber (typically ± 0.5%) may be the profile of weld joint line, the easy penetration, and the root of very low porosity of welds.

 

Other laser technology can achieve such welding, but the fiber laser can be performed under a lower operating cost and better quality and faster welding. We believe that the standard 200-watt fiber technology of laser welding, features low cost, so it can be used for future production of fuel cells to reduce costs.

 

For fuel cell sheet of the heat supply at a minimum, to maintain its deformation within an acceptable range, the need for welding of large aspect ratio (usually 3:1 or 4:1). Differentiator welding laser fiber is easy to under 200mm in height of solder joint under the meet this requirement. Therefore, the deformation of metal plates that are stacked up when the metal plate that may occur when the accumulation of problems can be minimized.

 

“Keyhole” and the large depth-width ratio of weld metallographic analysis found in welding are often porous, especially in the root weld. In applications of fuel cells, essential for the integrity of the seal is completely welded the primary requirement. Low-quality welding seriously reduce the life of the fuel cell, there may even be hydrogen or other fluid leaks. Experience has shown that the fiber laser in part which has the unusually high density of energy, particularly for fuel cells, apple powerbook g4 17 inch battery  can be consistent and reliable, non-porous weld.

 

The other by some manufacturers that the problem is that when the use of Yttrium Aluminum Garnet (YAG) or CO2 laser welding high production rates mai a “convex peaks” phenomenon. This is caused by welding at high speed pool of liquid metal caused by the inherent instability. Because it limits the rate of production, so some manufacturers as a problem. However, if one uses a standard 200-watt fiber laser, even at 5 — 6 meters per minute, the welding speed, they do not face this problem, equivalent to the length of each of over 2500 kilometers of welding.

 

In a production environment, the advantages of fiber lasers is also very high cumulative work hours, and unlike other laser light sources, as needed supplies, such as Nd: YAG laser the need to regular replacement flash, while the CO2 laser will keep the supply of gas used. In addition, the fiber laser power efficiency, power consumption is less than Nd: YAG laser 1 / 10, which can greatly reduce the cost of welding operation. May they require “real time” lean, sony vgp-bps8 battery   rather than some other types of lasers as a first preheated, which further reduces energy consumption and inefficient work hours. Because the laser fiber is sealed components, without changing lights and adjust the mirrors, therefore low maintenance costs, each fiber lasers could save thousands of dollars each year.

 

Conclusion

 

With the achievement of high productivity, high integrity and low operating costs of the weld, a manufacturer of fiber laser for the fuel cell provides a fabrication “beautiful green” technology.

 

Manufacturers of fuel cells major research findings show that the fiber laser welding will promote the technology of fuel cells from promising ideas to develop in solving energy shortages in the world, the business program but play a vital role.