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American Scientists Make Great Leap in Battery Technology

March 02, 2012
“The cost of [battery] cells will be less than half — perhaps 45 percent — of cells today, and the energy density will be almost three times greater than conventional automotive cells.”
- Atul Kapadia, chairman and chief executive of Envia

Envia Systems, a battery maker based in California, announced on Monday what it called a “major breakthrough” in lithium-ion cell technology that would result in a significant increase in the energy density — and a sharp reduction in the cost — of lithium-ion battery packs

Envia’s announcement said that its packs would deliver cell energy of 400 watt-hours per kilogram at a cost of $150 per kilowatt-hour. Though it doesn’t disclose a cost breakdown, Tesla Motors rates the energy density of its Roadster’s pack at 121 watt-hours per kilogram. Envia said its energy-density performance was verified in testing of prototype cells at the Naval Service Warfare Center’s Crane evaluation division.

“If it’s true, it’s a huge breakthrough, because the main problem for battery cars has been cost,” David Cole, chairman emeritus of the Center for Automotive Research, a nonprofit research group based in Michigan, said in a telephone interview. “Right now, the lithium-ion battery is about three times as expensive as it should be for reasonable commercialization. That kind of cost target is the holy grail, and once it’s achieved it’s game on.”

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