Tesla to Use High-Energy Batteries from Panasonic  

Technology Review reports that Tesla are partnering with Panasonic to supply long life lithium ion batteries - Tesla to Use High-Energy Batteries from Panasonic.

Tesla Motors, the maker of high-performance electric vehicles, is working with Panasonic, the battery and consumer electronics giant, to develop its next generation of batteries. The partnership is intended to help Tesla lower the cost of its batteries and improve the range of its vehicles.

Last month Panasonic announced two high-energy batteries for electric vehicles. These new batteries store as much as 30 percent more energy than its previous lithium-ion batteries, and this increased storage could, in theory, increase a vehicle's range by a similar amount, thereby addressing one of the main problems with electric cars. Tesla's Roadster currently has a range of 244 miles and takes three and a half hours to charge with a special charger.

The other major challenge with electric vehicles is the cost of the battery packs. Tesla isn't announcing the potential cost savings with future batteries, but JB Straubel, Tesla Motor's chief technology officer, says battery costs have been steadily declining at about 8 percent a year.

Tesla plans to incorporate Panasonic's cells into its battery packs, and will work with Panasonic to develop cells fine-tuned for use in cars, Straubel says. To do this, Tesla will draw on data gathered from the 1,000 cars it has made so far, which have been driven for over a million miles. Tesla currently gets its batteries from a variety of manufacturers.