Batteries
Modular Battery Charge Controller
Posted in Batteries, Electronics & Computers, Energy Storage, Energy, Briefs, GDM on Monday, 03 August 2009
A John H. Glenn Research Center-developed controller features distributed charge control and a masterless communication bus, enhancing its robustness for use in battery energy-storage applications. The modular battery charge controller is required in battery chemistries that need cell-level charge control for safety.
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Room-Temperature-Cured Copolymers for Lithium Battery Gel Electrolytes
Posted in Batteries, Electronics & Computers, Briefs, GDM on Monday, 06 July 2009
Polyimide-PEO copolymers with branched rod-coil molecular structures, that can be cured into film form at room temperature, have been invented for use as gel electrolytes for lithium-ion electric- power cells. These copolymers offer an alternative to previously patented branched rod-coil polyimides, and an advantage in room-temperature functionality.
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Lithium-Ion Batteries Fuel the Future of Automotive Design
Posted in Batteries, Electronics & Computers, Transportation, Articles, Features, GDM on Saturday, 20 June 2009
In 1924, General Motors president Alfred P. Sloan Jr. devised annual model-year design changes in order to maintain unit sales. Body shapes faced cosmetic changes every year, whether or not the underlying automobile had changed. This breakthrough strategy had widespread effects on the automobile business, automotive design, and eventually the United States economy. In recent years, amongst a worsening economy and a struggling auto industry, the underlying automobile has changed rapidly, with emphases on efficiency and environmental friendliness.
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Oxide Fiber Cathode Materials for Rechargeable Lithium Cells
Posted in Batteries, Electronics & Computers, Briefs, GDM on Friday, 19 June 2009
Fibers have been investigated at Johnson Space Center as alternatives to other powders used as lithium-intercalation compounds in cathodes of rechargeable lithium-ion electrochemical cells. The fibers can be pressed and sintered to form a cathode, without need for a binder or a conductive additive. The inter-grain contacts of the fibers are stronger and offer reduced loss of capacity from cycle to cycle.
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Utilizing Ocean Thermal Energy in a Submarine Robot
Posted in Batteries, Electronics & Computers, Alternative Fuels, Green Design & Manufacturing, Geothermal Power, Renewable Energy, Energy, Briefs, GDM on Wednesday, 17 June 2009
A proposed system would exploit the ocean thermal gradient for recharging the batteries in a battery-powered unmanned underwater vehicle (UUV) of a type that has been deployed in large numbers to research global warming. A UUV of this type travels between the ocean surface and depths, measuring temperature and salinity.
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Alternative OTEC Scheme for a Submarine Robot
Posted in Batteries, Electronics & Computers, Alternative Fuels, Green Design & Manufacturing, Geothermal Power, Renewable Energy, Energy, Briefs, GDM on Tuesday, 16 June 2009
An alternative system for exploiting the ocean thermal gradient to generate power would be based on the thawing-expansion/freezing-contraction behavior of a wax, or perhaps another suitable phase-change material. The power generated by this system would be used to recharge the batteries in a battery-powered unmanned underwater vehicle.
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