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Envia Systems announced test results that verify the company’s next-generation rechargeable battery has achieved what the company says is the highest recorded energy density of 400 Watt-hours/kilogram (Wh/kg) for a rechargeable lithium-ion cell. When commercialized, this 400 Wh/kg battery is expected to slash the price of a 300-mile range electric vehicle by cutting the cost of the battery pack by more than 50 percent.

The testing of Envia’s next-generation lithium-ion battery was performed by the Electrochemical Power Systems Department at the Naval Surface Warfare Center (NSWC) in Crane, Indiana, under the sponsorship of ARPA-E. Tests at various cycling rates at NSWC confirmed that Envia’s automotive battery cell demonstrated energy density between 378-418 Wh/kg for rates between C/3 to C/10 for a 45 Amp-hour (C/3) cell. Similar cells have been cycling in Envia’s test labs for over 300 cycles. NSWC Crane will also test these cells to validate cycling performance.

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