New Materials Replace Platinum For Solar Power Batteries

Scientists at the University of Michigan have announced that they have developed a low-cost cathode material for inverter solar power generator systems that can replace the precious metal platinum previously required for the production of dye-sensitized solar power batteries. Related research online published in the scientific journal "Applied Chemistry (International Edition)" on. Dye-sensitized solar cells have the characteristics of good stability, high theoretical efficiency, simple process and environmentally friendly production process, and are considered as one of the most promising new solar power batteries technologies. Flexible solar cell based on it is good for flexibility, light weight, easy to produce large area, it is a hot spot in recent years. But in large-scale promotion and application of the technology before there are many obstacles need to clear. Precious metal platinum is one of them. Although platinum in the dye-sensitized solar power batteries PV module wiring patented in the manufacture of small amount, but its price of $ 1,500 an ounce or to a certain extent, pushed up the price of the final product for large-scale promotion of increased difficulty.

To this end, responsible for the study of the University of Michigan Institute of Materials and Engineering, Professor team, specializing in the development of a new stuff can substitute platinum, the researchers call it honeycomb 3D graphene. To create this unique structure of the graphene material, Hu Yunhang team to lithium oxide and carbon monoxide chemical reaction, resulting in a lithium carbonate (Li2CO3) and honeycomb graphene mixture. Then, the lithium carbonate particles in the entire structure are removed with an acid, leaving the honeycomb-like graphene. The researchers found that the honeycomb 3D graphene has excellent electrical conductivity, high catalytic activity, in the energy storage and conversion potential. In order to confirm the conjecture, they will dye-sensitized solar cells in the platinum electrodes replaced by honeycomb 3D graphene electrodes. Under the same sunshine conditions measured results show that the use of new materials, solar cell photoelectric conversion efficiency of 7.8%, and the use of platinum in general dye-sensitized solar power batteries 8% is very close.

Solar ventilation system uses solar panels installed in the roof of the battery to absorb solar energy, driving the vehicle ventilation system to reduce the temperature inside the car. At the same time, the world's first intelligent remote control remote control air-conditioning system also appears in the Prius configuration on a single, driving the solar energy system, solar panels, solar panels, solar panels, solar panels, solar panels, Passengers can enter the vehicle before opening the car air conditioning, in advance to create a low threshold of the PV module company cool space.

The world's first, convenient and practical touch tracking display, the driver can set the steering wheel on the air-conditioning, sound and other pressure-sensitive touch button operation displayed on the central display, not only to facilitate quick view of the relevant driving information, But also help to reduce the line of sight when driving the transfer, improve traffic safety. In fact, this design is derived from the Prius environmental philosophy: solar power batteries consumption in the configuration and energy consumption will rely on oil to a minimum.

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ICFO Developed An Upgraded Version Of Organic Solar Power Generator

Building windows allow the sun to come in, while also storing solar energy, which will be what kind of scene? This looks like a small on grid inverter 5kw, said the window into a solar cell for solar power generator, to help us relieve dependence on fossil fuels and to promote the environment toward the green, clean direction. In a recent study, the researchers created a highly transparent, upgraded version of the organic solar cell, which marks the beginning of renewable energy technology to a reasonable price, clean, widely used, but also a new generation of high-power inverter package A step forward.

Today's commercial solar panels are mostly made of polycrystalline silicon solar power batteries, which have the advantage of high solar power conversion efficiency (about 15% of stainless steel photovoltaic pump factory), but there are several problems, it can not fully realize the potential value. First of all, it only absorbs direct sunlight, the absorption of diffuse light is limited; Secondly, the battery bulky, opaque and very heavy, less flexible. Although organic solar battery technology has been available for 30 years, it is not until today that people are paying attention to the technology because it can reduce production costs. Although the conversion efficiency of organic batteries is not as good as that of polycrystalline silicon cells, these organic solar cells are more compact and flexible (able to adapt to curved surfaces) and are sensitive to low and non-direct light, making it the most attractive photovoltaic Technology. In addition, it can be used as a translucent device, such as glass windows, so particularly interesting.

Similar to other solar power generator technologies, only the opaque devices, organic photovoltaic can achieve the most efficient power conversion. In order to make these cells transparent, the thickness of the metal back electrode must be reduced to a few nanometers, so that the ability of the device to absorb sunlight will be greatly reduced. ICFO researchers have been able to integrate a translucent cell into a photonic crystal to ensure that its power conversion efficiency is the same as for opaque battery devices. Addition of additional photonic crystals to the battery, can enhance the battery's absorption of infrared and ultraviolet light, reaching 56%. At the same time, a battery such as a glass plate is ensured to be transparent. Efficiency and transparency of the combination, so that these cells become a building integrated photovoltaic technology leader. In order to allow the battery and the natural appearance of the building integration, the color of the battery must be adjusted, and the adjustment method is simply to change the configuration of the photonic crystal layer.

In order to achieve the cheap application of solar powered portable generator, scientists and engineers are actively looking for a low-cost production technology, flexible thin integrated solar street light program solar cells show great potential. Because they only need a small amount of material, through the volume to volume processing can be mass production. And second only to the market share of silicon-based solar cell cadmium telluride thin film solar power batteries, the current production cost is the most inexpensive.

However, these covered solar power batteries often require a transparent scaffold that allows daylight to pass through and reach the cadmium telluride light collection layer, which also limits the selectivity of the media to the transparent material. Today, the use of flexible foil foil metal foil as a stent material, but the metal foil substrate cadmium telluride battery performance is poor, the use of less than 8% efficiency. In order to improve the conversion efficiency of cadmium telluride batteries, the Swiss Federal Institute of Materials Science and Technology (EMPA) Optoelectronic thin photovoltaic panels Optimum angle of the cornea laboratory researchers decided to try in high vacuum evaporation to the cadmium telluride layer, while the follow-up The heat treatment will penetrate copper atoms into cadmium telluride. They quickly realized that the amount of copper must be carefully controlled and that the conversion efficiency of cadmium telluride cells would not be much improved if used too little or too much. However, when the amount of Cu evaporation is properly adjusted and stored, a single atomic layer of copper is attached to the CdTe surface, the electron properties are significantly improved and the efficiency is increased to more than 12%.

Now, the flexible metal foil cadmium telluride solar power batteries are still somewhat higher than the maximum efficiency developed in 2011, polyimide foil solar cells. Next, they will focus on reducing the thickness of the window layer above cadmium telluride so that more sunlight is collected in the cadmium telluride layer to improve efficiency, said Stephan EMPA, chair of the lab.

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UNSW LED A Number Of Asian Bbattery Manufacturers To Develop Hydrogen Passivation Process

Professor Wenham was interviewed by PV Tech's daily PV journalist at last week's European PVSEC in Paris. He said a number of major lifepo4 batteries  manufacturers in China, Taiwan, Korea and Singapore will work with UNSW to conduct hydrogen passivation research and equipment retrofits that will help improve the quality of silicon wafers and possibly To ensure low cost under the premise of improving the efficiency of the lifepo4 batteries. UNSW's research on this technology has been going on for several years, and we have been able to show our technology to manufacturers very simply. He said that these manufacturers are very interested in our show and hope to co-sponsor UNS Solar Street Light Order Contract W to carry out research and development, and in the industrialization process of cooperation.

Photovoltaic panel bracket installation

Different from previous cooperation or patent licensing, Professor Wenham said: (hydrogen passivation process) is not a whole battery design, it is only a process to improve the quality of silicon, it seems this process can be with all battery manufacturers Production process compatible. Therefore, in our display to the manufacturers, regardless of what kind of lifepo4 batteries technology they use, no matter what kind of silicon they use, we can effectively improve the quality of its silicon.

Hydrogen passivation process

Professor Wenham said that although the photovoltaic industry are more or less understanding of hydrogen passivation technology, but the UNSW research shows that the previous understanding of hydrogen blunt flower how shallow. This technology is likely to increase the lifepo4 battery pack performance without increasing the cost of the premise. At present, our focus is mainly on how to control the amount of hydrogen in the silicon charge, if we can control it, you can greatly improve the hydrogen diffusion coefficient in the silicon material, improve the hydrogen passivation defects or other composite center efficiency . So any use of silicon-based battery manufacturers can theoretically use a very low cost to use this technology.

Cooperative research and development

At present, about lifepo4 battery pack manufacturers have signed this cooperative R & D project, which is similar to the joint venture R & D cooperation model is common in the semiconductor industry, but in the photovoltaic industry has not been popular, but Professor Wenham also pointed out that participating in the project Not only Asian battery manufacturers, equipment manufacturers in Europe including Meyerberg and Schmid donated part of the equipment for the project, and the hydrogen passivation process for transformation. Professor Wenham said the final equipment manufacturers will launch specifically designed for hydrogen passivation of commercial equipment.

This kind of research and development cooperation can let you invest every penny has a better return. I estimate that each company may actually spend only 5% of the total R & D costs, in addition to about 10 companies, the Australian Renewable Energy Agency ARENA will provide the remaining part of the R & D costs. Lifepo4 battery pack manufacturers may be more interested in such cooperation in the current difficult times of the industry. However, although the basic process of battery manufacturing is similar, but each manufacturer due to different lifepo4 battery design or will get different efficiency.

Schedule

Unlike traditional university-led next-generation battery technology R & D projects, the commercialization of hydrogen passivation will be more rapid. We expect this technology can be integrated almost immediately into the existing lifepo4 battery production line. But I think that if we want to explore the full potential of hydrogen passivation, we also need to find a revolutionary partner with the battery design, we believe that partners will certainly be able to benefit from the technology to improve battery performance. Professor Wenham concludes.

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New Solar Charger Made Of Folding Pavilion

SDA designed solar powered portable generator, a change in people's minds of solar panels shabby, rigid impression, called exquisite and practical solar art sculpture. The whole design is based on science fiction fashion, tight carbon fiber rods from the dynamic framework, covered with high-density polyethylene (HDPE) mesh film, forming a large area of ??solar photovoltaic panels. The digitally designed mesh fabric bends the support bar into a continuous, curved surface that is shaped like an elegant, translucent blue solar PV board installation manual.

The SDA solution is the most successful and original of more than 150 entries from around the world, embodying the visual impact, high quality, architecture, materials and functionality of the technology, according to the China Solar Panel Board. The perfect combination of progress. Clever ideas also include mobility flexibility and sustainable use. SDA design results delivered to the scene when fully folded into a small tent bag, assembled after a 7 m wide, 3-meter-high solar pavilion, looking at the back of the PV board to surface smooth continuous damage, no tradition Of the assembly assembly traces. "It's easy to deploy, easy to disassemble, and easy to move," says Professor Huang.

Solar pavilion is actually a charger, but the ingenious design, photovoltaic panels are embedded, the charging cable is implicit, it does not reveal sensual, quietly work. The use of lightweight, high-tech materials makes it cost-effective in manufacturing, transport and assembly. Moving without trucks or other equipment, installation does not require a professional team. It will be on September 15 of the Rome Motor Show for the Volvo V60 plug-in hybrids. Another view of experts is that if lightweight charging equipment proved to be practical and efficient, the owner is likely to accept such a way: parking, scaffolding, the sun, charging, and some production of traditional car charging accessories, small companies May be in trouble. Experts also praised the solar pavilion is expected to "PV housing" open ideas.

In today's highly developed information technology, people's travel has been inseparable from the electronic equipment, mobile phones, Tablet PC manufacturers such as solar street lighting is almost necessary to go out, but the way suddenly no power problems annoy the majority of users, portable electronic devices Continued power problems are increasingly concerned about solar street lamps Note. It is reported that not long ago, the United States Ubiquitious Energy company developed a facade such as electronic equipment foil solar power batteries, portable devices will make charging more convenient.

Most of the solar energy collection equipment is to absorb solar energy in the visible light, making the visual effects can not be completely transparent. But this film, such as solar power batteries by the layers of organic layers, it can absorb ultraviolet and infrared and other non-visible light and converted into electrical energy, while allowing visible light through the solar power battery, allowing users to use the solar power batteries at the same time to the normal use of Tablet PC . It is understood that, at present, this solar battery is still in the development and research and development stage, Ubiquitious Energy company said the product will be further improvement, and then consider listing.

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More Cost-Effective For Solar Power

German solar energy (14.93 + 2.54%, bought) and hydrogen energy research center, Karlsruhe Institute of Technology and IMEC scientists team, made of perovskite and copper indium gallium selenide (CIGS) thin film solar PV module stack , Conversion efficiency as high as 17.8%, set the world record. The conversion efficiency of the perovskite / CIGS multi-junction solar module is expected to exceed 25% in the coming years. This technology combines the advantages of two very advanced thin-film technology in the future to provide customers with more cost-effective solar power.

With the green transformation of energy forward, the development of solar energy and other clean energy will become a general trend. China's scientists have developed a record of a large area of high efficiency perovskite solar cells, China's first CIGS thin film solar energy industry, technological innovation strategic alliance was established to promote China's thin film solar energy industry. With the promotion of clean energy, thin-film solar energy will have broad prospects for development, can be applied to mobile power plants, photovoltaic construction, wearable equipment, new energy vehicles, smart city and so on. The field of solar powered portable generator energy related to technological breakthroughs in the development of industrialization or the ensuing wave.

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How to Choice Solar Controller

Exit the protection voltage

Some customers often find that solar lights in the light for some time, especially after continuous rainy days, the street will be a few days or even days off, detection of lifepo4 battery pack voltage is also normal, the controller, the lights are no fault.

This problem has been so many engineering business doubts, in fact, this is "out of undervoltage protection," the voltage value of the problem, the higher the value set, the longer the recovery time after undervoltage, it will cause many days can not light light. On this issue, the Industrial Controller gives each customer the ability to set the exit protection voltage according to the configuration. But it is worth noting that the configuration of the battery plate must be reasonable, if the lifepo4 battery pack charge per day can not meet the discharge capacity of the night, the long run, the battery is often in the depth of discharge, life is greatly reduced, so the battery board configuration must enlarge the margin , The greater the configuration of the solar power batteries panel, the lower the protection voltage can be set, so that will not cause the impact on the battery.

LED light constant current output

LED due to its own characteristics, must be through its technical means for constant current or current limiting, or can not be used normally. Common LED lights are low-frequency inverter head power is by adding a drive power to achieve constant current on the LED lights, but the drive has accounted for the total power of the lamp about 10% -20%, such as a theory The value of 42W LED lights, coupled with the actual power after the drive may be about 46-50W. In the calculation of solar panel power and battery capacity, you must add 10% -20% to meet the drive caused by power consumption. In addition, the more the more the driver on a failure of the link. Industrial controller through the software for constant current power consumption, high stability, reducing overall power consumption.

Output period

Ordinary controller can only be set to turn on the lights after 4 hours or 8 hours, such as a number of hours off, has been unable to meet the needs of many customers. Industrial controller can be divided into three time periods, each time can be arbitrarily set, according to the different use of the environment, each time can be set to close the state. For example, some plant or scenic no one at night, you can turn off the second period (late at night), or the second and third periods are closed, reducing the use of cost.I think will use this on solar power generator soon.

LED lamp output power adjustment

Among the lamps used in solar energy applications, LED light is the most suitable to achieve different output power through pulse width regulation. Such as a single 1W LED 7 Series 5 and 35W total LED lights, discharge at night, you can late at night and early hours of the time respectively, for example, the LED lights to adjust the duty cycle of the entire output, Power regulation, such as adjusting the night into 15W, 25W into the early morning, and lock the current, so that you can meet all night lighting, but also save the battery, battery configuration costs. The long-term test shows that the pulse width modulation mode LED lights, the whole lamp heat generated to be much smaller, to extend the life of the LED.

Some lamp factory in order to achieve the purpose of night power, the LED lights made of two internal power supply, night off all the way to achieve half the power output power, but the practice has proved that this method will only lead to half of the light source first light Attenuation, inconsistent brightness or damage all the way to light early.

Line loss compensation

Line loss compensation function of the current conventional controller is difficult to do, because the need for software settings, according to the different diameter and line length to give automatic compensation. Line loss compensation in low voltage system is very important, because the voltage is low, the line loss is relatively large, if there is no corresponding line loss compensation, the output voltage may be lower than the input a lot, this will cause the battery in advance Undervoltage protection, battery capacity of the actual application rate was discounted. It is noteworthy that we use the low-voltage system for solar powered portable generator, in order to reduce the line loss pressure drop, try not to use too thin cable, cable and not too long.

Cooling

Many manufacturers in order to reduce costs, not consider the cooling problem, so that the larger the load current or charge current is large, the heat increases, the controller of the field tube resistance is increased, resulting in a significant reduction in charging efficiency, field tube Overheating life is greatly reduced or even burned, especially in summer outdoor environment temperature is very high, so a good cooling device should be essential for the controller.

MCT charging mode

Conventional solar controller charging mode is copied from the mains charger three-stage charging method, namely constant current, constant voltage, floating charge three stages. Because the mains power grid infinite energy, if not for constant current charging, will lead directly to the battery blasting and damage, but the solar street light system battery plate power is limited, so continue to use the mains controller constant current charging method is not Science, if the current generated by the battery panel is greater than the first paragraph of the controller limit the current, then it caused a decline in the efficiency of the charge. MCT charging method is to track the maximum current, do not waste, by detecting the battery voltage and calculate the temperature compensation value, when the battery voltage close to the peak time, and then take the pulse of the trickle charge method, both the charging method, Allowing the solar power batteries to fill also prevent the battery overcharge.

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Japan Pioneered Development Of Artificial Light Synthesis Technology

The sun shines a minute of the earth's energy enough to allow the world's human use for one year. Continuously improve the conversion rate of photovoltaic is important for solar power generator .We all know that plant photosynthesis can be water and carbon dioxide into organic matter and oxygen, 70% of the Earth's surface covered with water, a large number of human carbon dioxide is to make the global warming intensified, if we can solar, water and carbon dioxide that three Species of infinite resources to be used effectively, then the human needs of methanol, ethylene and other energy and chemical raw materials will also become inexhaustible.

This technology has been made in Japan, a great breakthrough for storage solar energy, which is artificial light synthesis technology. It is understood that Japan's Matsushita company in December last year, the first successful use of outdoor sunlight experiment, and produce organic compounds formic acid; May this year, the Toyota Motor Group's Central Research Institute also use different methods and conditions for successful outdoor Completed the artificial photosynthesis experiment, also obtained formic acid. Research and development institutions, said: by improving the synthesis of photosynthetic catalyst, solar panels have also successfully generated the price of ethanol, methanol, ethylene, methane and other organic matter on solar power generator, but the organic matter produced by the experiment is relatively small, solar energy conversion efficiency of only 0.2%  and plant the same, so the solar light synthesis technology needs to be further improved, and strive to 2016 to 1%.

For the technology, the 2010 Nobel Laureate in Chemistry Nobuyuki Keisuke also expressed great support, he believes that: for the lack of resources in Japan, it should vigorously support the development of artificial light synthesis technology, Professor Keisuke Kenji has now convinced the Ministry of Culture Science and technology of the relevant cadres, has been set up artificial light synthesis technology for the national strategic projects. It is understood that in November last year, the Japanese Ministry of Economy, Trade and Industry, Japan Ministry of Education jointly decided to invest in the next 10 years, 15 billion yen (about 900 million yuan) for research and development of artificial light synthesis technology, and strive in 2021 the sun Light energy conversion efficiency increased to 20%-25%.If you reach 25% will be a revolutionary breakthrough for solar power generator.

According to the current progress, synthetic light technology is also faced with low-cost, large-scale equipment development, and many other issues, the future will be through research and development for solar power batteries. In the future through the development of artificial synthesis of light technology is the concept of the Osaka City University professor, New catalyst, and strive to practical in 2030. Professor also pointed out that it is not difficult to imagine, Europe and the United States, China and South Korea and other countries in the future will be manually sorted PV artificial video components in the field of artificial light to catch up with Japan, but as long as Japan to achieve practical, then to ensure absolute superiority, which will also drive the Japanese energy revolution and economic growth.

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S72 Solar Mobile Power Supply

People travel, usually through various types of digital devices for communication or entertainment, and digital equipment itself is far from enough to support their own power to run long, so people will choose a mobile power as a reserve power , Can significantly extend the life of digital devices in the hands of time. Today, I here to introduce a mobile sunshine s72 mobile power use lifepo4 battery pack for storage solar power, this is a can use solar charging can also use ac charging dual-purpose mobile power supply. When people use the outdoor side can be very square PV module string welder at any time charge, more practical.

Mobile Sunshine S72 mobile power on the sun can directly use solar charging, extended mobile power life, the nominal capacity of 7200mAh lifepo4 battery pack, can support the maximum 5V / 1A charge output, can be better To meet the needs of most users of digital devices in the hands of the charge. Many people have encountered in outdoor digital equipment without the pain, a long time outdoors with a solar mobile power is necessary.


Mobile S72 mobile power fuselage comes with monocrystalline silicon solar panels, had been used for the military; body heat ABS air plastic, better than ordinary plastic heat dissipation, better protection of power. Monocrystalline silicon solar panels allow the conversion of solar light to mobile phones, PSP and other electronic equipment.

This S72 use lifepo4 batteries with BMS very safe.Move the sun S72 top of the key hole for the beautiful design, simple and stylish, usually the user can hang it on the wall, saving space, carrying out, you can wear through the rope ring in the chest, easy access at any time. Keyhole design below a black power key, it is very eye-catching, next to the design of four LED power indicator, you can press the power key to see the remaining power. This mobile power in the design of the beginning of the adoption of a lot of user recommendations for the majority of users.

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New Materials to Improve Photovoltaic Cell Efficiency

US media said the crystal headlamps formed by the ice blue light emitted by the foundation, and may become the future of solar power generator technology to rely on.

US Science Daily reported on October 25, the crystal is the core of the diode. The crystal is not a naturally occurring crystal present in quartz, but is a crystal material which is artificially made to form an alloy (for example, indium gallium nitride). This alloy can form light-emitting diode (visible light band) and the laser diode (blue ultraviolet band) light-emitting area. How to Make Better Crystalline Materials - High Crystallinity, Light Emitting Efficiency and Luminosity - is also the work of Alex Fischer, a scientist in the Fernando Pons research team at the Department of Physics, Arizona State University, and Dr. Wei Yong, Ph.D. candidate, is in the research focus. In a recent paper in Applied Physics, the team revealed a rationale for a new approach to growing indium gallium nitride (GaN) crystal materials for diodes, a new approach that is expected to drive breakthroughs in photovoltaic solar powered portable generator technology Of the efficiency. Working with the team was a team led by Georgia Institute of Technology professor Alan Doolittle.

Reported that these In GaN crystal is sapphire substrate cultured on the layered structure. As usual, the researchers found that there was a difference in the atomic spacing of these layered structures: a phenomenon that could lead to high pressures, disruption of growth, and fluctuations in the chemical composition of alloys. "It would be very beneficial to reduce this pressure and improve the uniformity of solar PV generation system module nuts during the formation of InGaN crystals, but it is difficult to achieve," said Professor Pons. Culturing these lamellar structures is similar to trying to seamlessly combine two honeycombs with different honeycomb sizes. When the two honeycombs are combined together, the difference in size will disrupt the regularity of the hive.

According to the researchers in the paper narrative, they invented the method using molecular pulse to obtain the required alloy composition. This method, invented by Doolittle, is called modulation-oriented epitaxy. "This technique allows for the layered growth of the crystalline material at the atomic level," said Ponce, the first author of the paper, and co-author Wei Yong, who analyzed the atomic arrangement and luminosity at the nanoscale.The films grown by the epitaxial orientation technique have almost ideal properties and reveal that this unexpected result comes from a decrease in pressure during the growth of the first atomic layer of crystals.

Poults says Doolittle's team assembled a more uniform crystal with the lattice matched together, resulting in a film that resembles a perfect crystal. Luminosity is also close to the perfect crystal. This has been considered impossible in our field. Elimination of the non-uniformity of crystal material composition and lattice mismatch, which once seemed to be insurmountable defects, will ultimately lead to the development of efficient light-emitting diodes and solar photovoltaic products such as solar powered portable generator in the future.

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Flexible Solar Mobile Power Supply

Rolled up like a folding umbrella, open to a solar charging Po, the sun on the home solar power generation system can continue to charge the phone. One of them, like a scroll, slowly unfolds with five shiny blue metallic luster solar power batteries. These thin as onion skin cells in the sun exposure for 6 hours, you can charge for two Apple phones.

In the past we common solar power batteries are mostly crystalline silicon cells, relatively heavy, but also easy to break, and they are using amorphous silicon thin film solar power batteries, the same power, the weight reduced by four-fifths, and the flexibility of the product higher A chip, you can freely curl, fold, even if the ground is not bad on the step. The most cattle is, laboratory tests show that, even against this flexible battery open a shot, burn through a hole, does not affect the use, but damage that small can not generate electricity only.

Is a thin layer of crystal glass panel that can be embedded in devices such as smart phones, watches, tablets and other small and medium screen sizes, and then play the role of solar panels. Under normal circumstances, Wysips showed a completely transparent state, ordinary people do not see this is a solar panel, the use of the process will not affect the user's normal operation, when there is sunlight or artificial light exposure to the phone screen, It will begin to work for the phone to charge by solar powered portable generator.


According to reports, and other free-curling amorphous silicon thin film solar products, thinner, softer: the product includes semiconductor power generation film, stainless steel substrate, a total of 10 layers of packaging film, the thickness is less than 1 mm, a lot of The materials are nanoscale.

Solar power batteries technology has not been as rapid as the smart phone itself, so this extra 15% of the electricity can sometimes solve many big problems (if the phone will be placed under the light source to charge, will bring more extra power). And this new technology in theory can help many people go out forget to bring the charger or can not find the power of the phone to use more time. And this miniature solar charging panel to join, you can make the phone a substantial increase in power.

This technology can be applied to many aspects, such as made of energy umbrella, summer, umbrella surface absorption of solar energy, umbrella within the small fan blowing hair; also can be made into outdoor clothing, outdoor package, while charging the roadside; The advantages of a cell sheet is attached to the roof of various shapes, street lamps,or other portable solar power generator ,do not affect the original shape. Amorphous silicon material with low photoelectric conversion efficiency problems, if the use of copper indium gallium selenium material, photoelectric conversion efficiency can be doubled, flexible solar charging Po can do more soft, more compact car inverter circuit, but after Manufacturing technology is foreign monopoly.

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Development Trend and Challenge of Serial Inverter

In recent years, the group of string ground solar power station in the world is widely used. Compared with the centralized solar power generator, there are obvious advantages of the string-type power plant, which is embodied in the following points: high solar power generation, small footprint, no machine room, reliable operation and easy maintenance. Especially for distributed roofs, mountain and hill projects, group string program has an unparalleled advantage.

Solar power station generally selected in the desert, plateau and other sunny places, these areas very low temperature in winter, summer temperatures are very high, large sand, high altitude, light intensity, and some sites even at the beach, corrosive. In these scenarios, the Shenzhen string inverters are exposed directly to the outdoors by hanging walls, hanging photovoltaic panels, or hanging independent mounts, and external components are at risk of rain, dust, and aging. How to do both to adapt to harsh environments, but also to meet the inverter cooling, as we are most concerned about.

Common Ways and Problems of Group Cooling Inverter

Inverter heat dissipation are mainly natural cooling and air cooling in two ways, the key factor affecting the cooling capacity of the convective heat transfer coefficient. Under normal circumstances, the air-cooled heat transfer coefficient of heat flow than natural convection by an order of magnitude, so the group outside the string to increase the inverter fan can greatly enhance the cooling capacity, industry manufacturers generally use this method of cooling. However, string string inverter application environment is poor, its external fan protection performance requirements are higher. The current outdoor fan protection rating generally only IP54 / IP55, external fan design led to the overall system protection level can not reach IP65. At the same time, in order to avoid rain directly scouring the fan, the design of cooling solutions, the duct will become very complex, limited form of the air duct, once the fan failure, thermal capacity decay serious, this will make the inverter output power reduction, , A serious impact on customer interests with portable solar power generator. More critical is that the fan perennial exposure to rain and dust, corrosion, serious decline in life expectancy, the inverter life cycle need to replace the fan many times, high maintenance costs.

The Solution to the Problem of Heat Dissipation in Series Inverter

No external fan design is the more advanced solutions, the inverter without the need to install external fan, the protection level can reach IP65, and low noise, high reliability, elimination of fan failure due to attenuation of cooling capacity power derating, easy maintenance, low cost.

With the increase in output power and volume reduction, cooling capacity will be the biggest bottleneck in string inverter design. For this problem, you can use copper-aluminum composite, heat pipe, are temperature-hardened way to reduce thermal resistance, enhance the radiator cooling capacity. Another important way is to increase the internal cavity fan to improve the internal spoiler and enhance the heat dissipation capacity of the cavity, spoiler fan in the cavity because there is no protection problems, even if the failure of the overall cooling capacity and power of little effect.


The string inverter is designed with the above heat dissipation concept, plus Huawei's unique soaking design technology, thermal isolation, thermal shielding technology, etc., to achieve no external fan, the inverter overall protection class IP65, reliable High. From the long - term application situation of heavy sand in northwest plateau and strong corrosive environment in seaside of Hainan, the whole group string inverters for solar power generator have better reliability and protection effect, good performance and stable performance.

If the forced air cooling, the fan easily damaged, short life expectancy, frequent replacement of the fan in addition to the impact of the product (such as the use of high-temperature, Of the solar powered portable generator, but also bring expensive maintenance costs; In addition, if the inverter installed in the user's external walls and attic, forced air-cooled noise will easily lead to customer complaints. The use of natural cooling products, fanless, long-term product reliability, low noise, so self-heating, fanless design of outdoor small-power inverter key competitiveness.

This article from:http://www.storagebattery-factory.com/news/development-trend-and-challenge-of-serial-inverter.html

How Does a Solar Plane Fly at Night?

Look at the recent reports of solar energy in Switzerland can fly day and night, then, just by solar energy collection enough? If the night how to do it? According to media reports, the first inverter power by the sun to launch the aircraft by the Swiss explorer Bertrand Picard led 80 engineering and technical personnel spent 12 years to complete the design. "solar power batteries are the world's first can not add any fuel, does not emit any pollutants in the circumstances, the flight day and night aircraft. From the United States take off in California, without the addition of fuel in the case, completely rely on solar energy arrived in New York, caused quite a stir.

During the day the battery reserves the energy glide slowly at night

Sunshine Power aircraft made of carbon fiber, wingspan 72 meters, but its weight is only 2300 kg, with a car's weight quite. A total of 17,000 solar power batteries are mounted in the wing, providing clean energy for the four electric motors on the machine (17.5 CV per motor). On-board lifepo4 battery weighs 633 kilograms (2077 pounds), during the day, the solar power batteries will be charged into the on-board lifepo4 battery power for the night flight reserve power, therefore, the power of the sun power to a steady stream. Designed to have an average speed of 70 kilometers per hour and climb to a height of 9000 meters during the day to avoid airflow and maximize solar energy, the temperature rose sharply and at half-glide flight down to 1,500 meters at night The speed is not fast, so the demand for energy at night is also greatly reduced.


Sunshine solar power generator can not fly in bad weather, so the weather team needs to do weather forecasting work. In addition, the aircraft's flight speed will be slower, the plane flew from Beijing to London about 120 hours of flight, and fuel aircraft only 11-12 hours. Due to the different flight height during the day and night, resulting in a large temperature difference in the aircraft. In order to maximize energy savings, the aircraft did not install heating equipment, which pilots is a big challenge. This means that they have to endure the 30 solar street lamp discharge degree to minus 20 degrees extreme temperature. Only one pilots in each segment need to drive five consecutive days and nights, as the pilot must adhere to the training to ensure the body's tolerance and sustainability.

The plane was not built to carry passengers, but to convey the idea. Its global flight is designed to show clean technology and renewable energy photovoltaic module border grounding standards is how to challenge the limits of the task seems impossible to complete.

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Solar Power Battery Efficiency Up to 60%

Solar energy is probably the most well-known alternative energy source, but because of the challenges of cost and physics itself, there is still a long way to go before it becomes a fully sustainable and practical alternative energy source. However, the Japanese manufacturer Sharp now come up with a new solar power batteries, efficiency is the efficiency of most of the current solar power batteries twice.

Sunlight from a variety of wavelengths of light composition, the current solar panels on the market mainly silicon material, the main absorption and conversion of visible light, about one third of the sun, short wavelength near UV light does not work, the new light Rural solar street lamp factory electricity conversion rate of about 20%. The use of cheap aluminum-based materials, the oxide semiconductor substrate with high-density distribution diameter of only one thousandth of the hair diameter of aluminum fine particles. Experiments show that the use of this aluminum fine particle structure of the solar panels can be highly efficient absorption and conversion of sunlight in the near ultraviolet light, solar panels can photoelectric conversion rate increased to 30%.

Photovoltaic module team successfully developed before the use of fine particles of gold to capture near-ultraviolet light solar panels, but expensive, difficult to commercial use. The aluminum-based material for the battery panels wich is necessary for portable solar power generator, with low prices, not easy to damage the advantages of Jiangsu PV module frame manufacturers. Researchers will further study the shape and arrangement of aluminum fine particles and continue to improve the photoelectric conversion rate to develop efficient and low-cost solar panels.

The main problem with the efficiency of solar power generation is the nature of the sun itself and the laws of physics. When the sun shines on solar power batteries, it emits high-energy electrons that convert solar energy into electrical energy. However, in the unimaginable trillion trillion seconds, the energy carried by these electrons are converted into heat, no way to effectively use solar led street light. This decades-old problem has stumped many physicists working in this field. Now, Sharp's research team may have really solved the problem. Essentially, with new materials and new ideas, the team can let solar cells emit heat before high-energy electrons capture it. This is a groundbreaking milestone in solar science because they can harness these high-energy electrons for the first time to produce electricity from photovoltaic panels, achieving a theoretical conversion efficiency of 60 percent.If this come ture i think we need mor solar power generators for household and industry and other areas

The technology makes the battery, although has a good function, but in other areas still can not beat the traditional solar power batteries, but with its 9% of the light energy conversion rate, as emerging technologies in the field of solar cell PV test method has been pid Is a huge considerable progress. This solar cell application prospects are very wide, there is no traditional solar cells on the conditions and the temperature limit the number of solar photovoltaic panel installers.

Unfortunately, this kind of solar cell is still in the prototype stage, it is too thin, can not absorb more sunlight, and can only absorb a wavelength of sunlight. Most existing solar power batteries can absorb different wavelengths of sunlight this could use on solar powered portable generator. However, it has opened the door for the commercialization of high efficiency solar power batteries.

This article from http://www.storagebattery-factory.com/news/solar-power-battery-efficiency-up-to-60.html