Development of Li-ion Batteries for Plug-in Hybrid Electric Vehicles by HITACHI
On expanding the battery system business with an aim toward its industrial applications, Hitachi and Hitachi Vehicle Energy Ltd made an announcement on development of lithium-ion batteries for plug-in hybrid electric vehicles. The plug-in hybrid electric vehicles (PHEVs) have two running modes, namely an EV (Electric Vehicle) mode where the vehicle runs solely on a motor and an HEV (Hybrid Electric Vehicle) mode where the vehicle is operated by both the engine and the motor offering a dramatic improvement on gas mileage and reduction on exhaust emission. The newly developed battery by Hitachi features an electric capacity of 25Ah capable of running for 20km in EV mode which in comparison to existing Li-ion batteries developed by Hitachi is a 4 to 5 times improvement in capacity. Additionally, the new battery comes with a heat-resistant separator preventing internal short-circuits for added safety in mind. The separator constitutes a key component of lithium-ion batteries separating the cathode and the anode while maintaining ionic conductivity. The incorporate separator was specially designed for automotive applications based on ceramic separator technologies. A variety of simulations technologies, including have been utilize to increase battery strength and enhance the collector structure. Hitachi is planning the sample shipment of the new batteries from spring of 2010.
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