Wireless power Juice of the session (B)

• To exposure alternating electromagnetic fields are possible

Headwind for this inspiron 6400 battery technique comes from Achim Enders, director of the Institute for Electromagnetic Compatibility of Technical University (TU) Braunschweig, Germany. Enders looks beyond the technical difficulties, particularly the problem that can not be met with such a device, the limits to protect against the adverse effects of electromagnetic alternating fields. "Of course one should never say never, but the inductive coupling over large distances is preparing huge problems when it comes to protecting people," says Enders in "Bild der Wissenschaft".

The question of a possible have a negative impact on the people employed, the manufacturers of Apple Battery and ASUS Battery , which are also interested in the wireless transmission of energy. The rail manufacturer Bombardier for example, tested on its company site in Bautzen, a tram, requiring no overhead lines and their energy instead transferred by induction from between the rails applies electrical lines. Thus the appearance of historic city centers would no longer be marred by unsightly overhead wires. But even here, passengers and pedestrians have in front of a potentially harmful effects of electromagnetic fields are protected

• Solution for new market of electric cars

This also applies for electric cars, which pushes the issue of wireless shop by induction as much interest. The vehicles could easily be parked on induction loops, the contactless recharge their batteries with energy. A change of the aspire 3000 battery would then be as superfluous as the awkward fiddling with thick cables. Here, too, standardization is an important goal of the manufacturers: Sun developed the Association of Electrical Engineers) Information Technology (VDE currently a directive requiring all vehicles even later can be provided at all loading stations with energy. For a jumble of individual systems would be fatal in this nascent market.

Power package with great perseverance (B)

Marcel Groos, project manager for reputation would have liked - as well as Siemens - deep into the interior of the inspiron 1525 battery and looked done thorough testing. But he also understands that this is the Berlin-based start-up is too risky. Nevertheless, he remains on the ball: "We are in talks and want to install the battery in one of our cars."

If the Porsche are actually much further, would be stimulated, "sticking point for the electrical mobility is still the range," said Groos. Now it would not be equal to 1000 kilometers, but 300 would be good. In any case, reputation would even test whether the promises of Hannemann are realistic. Groos, "DBM is not out of the race, even if we know the inspiron 6000 battery technology is very costly."

Hannemann is the technique meantime to check the Federal Institute for Materials Research through its paces. "With the large-scale industry, we will not enter into partnerships," he says defiantly. There is currently with the little electric sports car manufacturer Lightning, several small aircraft engineers and logisticians in the conversation.

At a discount food store, the freight forwarder Eberl and packaging company Papstar be having their usual lead acid compaq presario v2000 battery forklifts compete against vehicles with hummingbird technique.

In 2009 a similar Papstar ran races with two identical forklifts: The Hummingbird for inspiron 6400 battery lasted about three hours longer, Papstar logistics chief Gregory Falcon could not believe it: "It blew us. We can imagine ourselves well, convert the entire fleet, "said Falcon. Hannemann was in January, the "Innovation Award of reason." Ironically Ex-Mercedes boss Juergen Hubbert to beat him and praised in the eulogy: "A car in the compact class with electric drive and a range of 500 kilometers is on the horizon."

The trophy is now in the barren and somewhat makeshift headquarters in Berlin between DBM inspiron 710m battery on the windowsill. The charm of the slightly chaotic founding, however, could soon disappear: The company wants to grow. Resulting in Thuringia and Baden-Wuerttemberg soon two new production plants. Mirko Hannemann is only beginning.

Researchers are looking for the super battery(

A key problem is to concentrate as much as electrical energy in the smallest space. Researchers at the Fraunhofer Institute for Chemical Technology (ICT) in Pfinztal near Karlsruhe, therefore, attempt to replace conventional graphite electrodes from a1185 battery with materials from tiny, only a few hundred nanometers thick carbon tubes and fibers. This would dramatically increase the inner electrode surface. Normally, lithium ions move only between the graphite layers of the host lattice. A task that is called intercalation. The Nanokohlenstoff from Pfinztal is also different here: "If nanotubes are deposited lithium-ion addition to the edges and surfaces of material layers. Nanotubes can also be manufactured so that a much larger proportion of occupied Interkalationsschichten of lithium-ion inspiron e1505 battery ," says Jens Tübke head of ICT at the Department of Applied Electrochemistry.

Meanwhile, the researchers were able to increase the discharge capacity of nano-batteries to about 800 milliampere hours per gram (mAh/g). Classical graphite vgp-bps5 battery provide only 300 mAh / g. Nor is the production of micro-carbon nanotubes-consuming and expensive.

Ten times more lithium ions per gram of silicon can store as an electrode material in comparison to graphite. To the chagrin of the researchers, however, increased fourfold while the original volume of the brittle semiconductor materials. The result: After a few charge cycles to show cracks. Here, too nanostructures to solve the problem. For example, researchers at Stanford University are experimenting with micro-fine silicon tube as an electrode material of latitude d510 battery . In the nanofibers mechanical stresses during loading and unloading can survive obviously much better than normal silicon crystals. In addition, the mini-tubes can be produced with the chip production process from relatively inexpensive.

In the laboratories of Stefan Koller, Institute of Chemical Technology of Materials at the Technical University of Graz are also lithium-ion inspiron 1520 battery tested with silicon electrodes. The Austrian researchers battery is however a containing silicon gel which is deposited on graphite as a substrate material. "It has graphite as a buffer to absorb the large volume changes of silicon in the ion absorption and emission," said Koller. The new material could thus save an unchanged lifetime, more than double the amount of lithium ions. Challenge, however, remains the poor density of the materials in the electrode.

High-performance inspiron 1721 battery should base on lithium-ion plating,and are used for electric vehicles such as energy, the relatively long time to load the batteries can quickly be the Achilles heel of the technique. Until now, battery experts have always assumed that lithium ions during charging is not fast enough to move through the respective electrode material. A computer simulation, carried out the Gerbrand Ceder, Massachusetts Institute of Technology (MIT) in Cambridge (USA), but then placed near the opposite: the example of the standard material lithium iron phosphate (LiFePO (-4)) showed cedar that lithium-ion moving within the electrode downright brisk. But they are thwarted by the limited number of access channels in the crystal lattice, which are also difficult to reach. The result is a jam of the charge carriers.