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A11E_EETimesEuro-2.375x10.875qxd_A11E.qxd 4/29 G H V O L T A G E H I Over 2500 Std.Models Surface Mount and Thru-Hole DC-DC Converters 2V to 10,000 VDC Outputs Low Profile / Isolated Up to 10,000 Volts Standard Regulated Models Available Silicon dioxide nanotubes help batteries last 3x longer Researchers at the University of California, Riverside Bourns College of Engineering See PICO’s full catalog immediately www.picoel e ctronics . c om High Power Up to 350 VDC Outputs (Units up to 150 Watts) Regulated / Wide Input Range Isolated Outputs PICOFax 914-738-8225 Electronics,Inc. 143 Sparks Ave. Pelham, N.Y. 10803 E Mail: info@picoelectronics.com Delivery Stock to One Week for sample quantities Pico Representatives Germany ELBV/Electronische Bauelemente Vertrieb E-mail: info@elbv.de Phone: 0049 89 4602852 Fax: 0049 89 46205442 England Ginsbury Electronics Ltd. E-mail: rbennett@ginsbury.co.uk Phone: 0044 1634 298900 Fax: 0044 1634 290904 Electronic load handles 6 kW for battery testing The EL97xx series of electronic loads available now from Intepro Systems, suppliers of power component and power system automated test equipment (ATE), offers users a simple means to test or characterise individual battery cells or multicell stacks. Models are available with power ratings from 150 to 6,000W for use as simple front panel controlled bench test or repair instruments, to components in complex, automated test and burn-in systems. Applications include repair of power supplies and equipment, through to testing batteries used for high reliability UPS and data-protection systems. Comprehensive battery testing can identify individual faulty cells allowing battery stacks to be rebuilt, reducing waste and recycling while improving reliability. Battery manufacturers can use the Intepro EL97xx series of electronic loads to characterise the performance of new designs, establish life expectancy and for production test. Automated testing provides repeatability and offers storage of test data for quality control, analysis and traceability. Test results may be fully interrogated and exported as spreadsheets or word documents into a SQL database. All Intepro EL97xx electronic loads are supplied with free software to simplify set-up and testing of batteries. Dynamic burn-in and discharge tests with user control of waveform may be performed with all test parameters available for user setting; live data is shown on a virtual control panel and a clear “capacity plot” is displayed. The user can add additional markers by using the icons on the tool bar to set a visual indicator to show the expected performance range. As well as being a standalone instrument the EL97xx electronic load is also designed for integration into larger automated test systems and may be controlled by Interpro’s open-source PowerStar software suite. Intepro www.inteproate.com have used a material found in surgical tubing to develop a way to make lithiumion batteries that last three times longer between charges compared to the current industry standard. The team created silicon dioxide (SiO2) nanotube anodes for lithium-ion batteries and found they had more than three times as much energy storage capacity as the carbonbased anodes currently being used. The discovery has implications for industries including electronics and electric vehicles, which are always trying to squeeze longer discharges out of batteries. “We are taking the same material used in kids’ toys and medical devices and even fast food and using it to create next generation battery materials,” said Zachary Favors, the lead author of a just-published paper on the research. The paper, which was entitled ‘Stable Cycling of SiO2 Nanotubes as High-Performance Anodes for Lithium-Ion Batteries’ was published online in the journal Nature Scientific Reports, was co-authored by Cengiz S. Ozkan, a mechanical engineering professor, Mihrimah Ozkan, an electrical engineering professor, and several of their current and former graduate students: Wei Wang, Hamed Hosseinni Bay, Aaron George and Favors. The team focused on silicon dioxide because it is an abundant compound, environmentally friendly, non-toxic, and found in many other products. Silicon dioxide has previously been used as an anode material in lithium ion batteries, but the ability to synthesize the material into uniform exotic nanostructures with high energy density and long cycle life has been limited. The key finding was that the silicon dioxide nanotubes are stable in batteries which leads to longer lifespans. SiO2 nanotube anodes were cycled 100 times without any loss in energy storage capability and the authors are confident that they could be cycled hundreds more times. The researchers are focusing on methods to scale up production. Bourns College of Engineering www.engr.ucr.edu www.electronics-eetimes.com Electronic Engineering Times Europe June 2014 53


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