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Hawaii study finds vehicle-to-grid discharge detrimental to EV batteries

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Results of a study by a team at the Hawaii Natural Energy Institute, SOEST, University of Hawaii at Manoa, suggest that the additional cycling to discharge vehicle batteries to the power grid in a vehicle-to-grid (V2G) scenario, even at constant power, is detrimental to EV battery cell performance. —Dubarry et al.

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US Hybrid awarded contract to deliver plug-in fuel cell shuttle bus to Hawaii County Mass Transit Agency

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California-based US Hybrid Corporation has been awarded a contract by the Hawaii Center for Advanced Transportation Technologies (HCATT) for the design, integration and delivery of its H 2 Ride Fuel Cell Plug-In Shuttle Bus for operation by the County of Hawaii Mass Transit Agency’s (MTA) HELE-ON Big Island bus service.

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Better Place, Sheraton Waikiki and Hawaiian Electric Partner on EV Charge Network in Hawaii

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Better Place has started its initial deployment of EV infrastructure in Hawaii, with the launch of a project to incorporate its electric-vehicle infrastructure in Honolulu, in partnership with Kyo-ya Hotels & Resorts’ Sheraton Waikiki Resort and Hawaiian Electric Company. Kyo-ya will operate two of the electric vehicles.

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Researchers Demonstrate Autonomous Underwater Vehicle With Novel Thermal Recharging Engine

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The Sounding Oceanographic Lagrangrian Observer Thermal RECharging ( SOLO-TREC ) autonomous underwater vehicle uses a novel thermal recharging engine powered by the natural temperature differences found at different ocean depths. Its thermal recharging engine produced about 1.7 —Russ Davis, a Scripps oceanographer.

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USC team uses mixed conduction membranes to suppress polysulfide shuttle in Li-S batteries

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One of the major issues hobbling the commercialization of high energy-density lithium-sulfur batteries is the “polysulfide shuttle”—the shuttling of polysulfide ions between the cathode and anode. The polysulfide shuttle is a major technical issue that limits the electrical performance and cycle life of this type of battery.

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US and Japan collaborating on smart grid project in Hawaii; EV operation and charging, including grid-balancing services

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The project is supported by Japan’s New Energy and Industrial Technology Development Organization (NEDO), in cooperation with the State of Hawaii, Hawaiian Electric Company, Inc., They will demonstrate their effectiveness at controlling EV chargers so they do not overload distribution facilities.

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Ultrasonic welding in the battery pack for the Cadillac ELR

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kWh battery pack in the new Cadillac ELR extended-range electric luxury coupe that goes on sale in North America in early 2014 ( earlier post ). The battery-specific welding process is a result of collaboration among GM’s Manufacturing Systems Research Lab, Advanced Propulsion Center, and Brownstown Battery Assembly plant near Detroit.

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