Researchers at the Korea Advanced Institute of Science and Technology have developed a technology for textile-based foldable batteries that are recharged via integration with lightweight solar cells.
Key to the researchers' approach was the use of unconventional materials -- in this case polyester yarn coated with nickel and polyurethane -- to form the battery's current collector, binder and separators (see figure below). The performance of the batteries is said to be comparable with that of conventional foil-based cells, even under severe folding/unfolding conditions. See "Wearable Textile Battery Rechargeable by Solar Energy" for more.
A wearable textile battery developed by researchers at Korea Advanced Institute of Science and Technology (KAIST) can be integrated with flexible solar cells to form a rechargeable cell that can be embedded into clothes, glasses, watches, and even skin.
(Source: Yong-Hee Lee, et al)
Multinational engineering/electronics manufacturer Siemens is developing power technology intended for use in self-sufficient deep sea factories -- planned for construction in 2020 -- that must be able to operate reliably for decades. The company is currently testing components in a special pressure chamber where they must be able to withstand a pressure equivalent to that found 4,600 meters under water for several months, in addition to special aging tests. The company has already assembled a deep sea transformer, and has plans to complete a switchgear system by the end of the year, and a frequency converter by the end of 2014. (See "Power supply systems for deep sea factories" for more.)
Siemens is currently developing power technology intended for use in self-sufficient deep sea factories located thousands of meters under water that must be able to operate reliably for decades.
A report by market research firm IHS forecasts that the global market for stationary batteries used in telecom applications will grow by $550 million to $3 billion by 2017. The report -- "The World Market for Stationary Batteries" -- predicts that the growth will be driven by increasing demands for reserve power for VDSL outside-plant cabinets and expansion in telecom central offices, while demand for use in base stations will decline.
In product news, an isolated monolithic flyback regulator from Linear Technology is designed to help simplify the design of isolated DC/DC converters. By sampling the isolated output voltage directly from the primary-side flyback waveform, the LT8302 needs no third winding or optoisolator for regulation.
International Rectifier has introduced dual-output voltage regulators for space-constrained netcom, server, and storage applications. Available in a 5-mm x 6-mm PQFN package, the IR3891 and IR3892 SupIRBuck devices are optimized for single-rail operation from 5-V to 12-V inputs or 1-V to 21-V input with external 5-V bias.
UK-based Amantys has launched a monitoring solution designed to enable performance monitoring of high-power IGBT module systems in high-voltage DC and industrial drive applications. The Amantys Power Insight Adapter sits between the host control system and the IGBT module and interfaces with the IGBT gate driver to export key real-time switching performance parameters from the power system.
Ericsson has announced a hybrid regulated ratio quarter-brick DC/DC converter that handles 864W. The PKM4817NH-PIHS offers a power density of 35.6W/cm3 (581W/in.3) and is optimized for datacom board applications that have a 52-58V system bus distribution.
Finally, TDK Corporation has introduced a new series of AC/DC power supplies rated from 15 to 150 W. The HWS-A series comprises five models with output voltages of 3.3 V, 5 V, 12 V, 15 V, and 24 V and efficiencies to 91%.