Breakthrough battery could revolutionise cost, range and safety of electric vehicles

Envia Systems, based in California, has announced test results that verify the company’s next-generation rechargeable battery has achieved the highest recorded energy density of 400 Watt-hours/kilogram (Wh/kg) for a rechargeable lithium-ion cell. When commercialised, this 400 Wh/kg battery is expected to slash the price of a 500km range electric vehicle by cutting the cost of the battery pack by more than 50 per cent. The testing of Envia’s next-generation lithium-ion battery was performed by the Electroche
March 23, 2012 Read time: 2 mins
4252 Envia Systems, based in California, has announced test results that verify the company’s next-generation rechargeable battery has achieved the highest recorded energy density of 400 Watt-hours/kilogram (Wh/kg) for a rechargeable lithium-ion cell. When commercialised, this 400 Wh/kg battery is expected to slash the price of a 500km range electric vehicle by cutting the cost of the battery pack by more than 50 per cent.

The testing of Envia’s next-generation lithium-ion battery was performed by the Electrochemical Power Systems Department at the 4253 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.

“Since the inception of Envia, our product team has worked tirelessly and logged over 25 million test channel hours to optimally develop each of the active components of the battery: Envia's proprietary Si-C anode, HCMR cathode and EHV electrolyte," said Dr. Sujeet Kumar, Envia Systems co-founder, president & CTO.  “Rather than just a proof-of-concept of energy density, I am pleased that our team was successful in actually delivering 400 Wh/kg automotive grade 45 Ah lithium-ion rechargeable cells.”

“Envia’s new battery technology represents exactly the kind of innovation and breakthroughs that ARPA-E is looking for from the American research and development community,” said ARPA-E director Arun Majumdar.  “We hope that this low-cost and high-density battery technology enables widespread adoption of electric vehicles across the country and around the world.”

Envia was awarded grants by both the 4258 Advanced Research Projects Agency-Energy (ARPA-E) and the 4259 California Energy Commission in 2010 to develop high energy density batteries for electric vehicles. 4248 General Motors Ventures participated in an equity investment round of US$17 million in 2011.

Related Content

  • Portuguese toll operator cuts energy costs
    April 17, 2012
    Portuguese motorway toll operator Brisa Auto Estradas de Portugal says it is saving over 10 per cent of its electricity costs – worth over US$430,000 – as a result of an energy efficiency plan which was launched in 2010. Electricity consumption accounts for 54 per cent of Brisa’s total energy expenditure, half of which is for the lighting systems of the motorway network.
    Read More
  • Electric and petrol-powered cars could be price-competitive in 2017
    July 29, 2013
    New projections from US advocacy group the Electric Coalition indicate that the cost of owning an electric car is on its way to becoming competitive with petrol-powered cars. The coalition teamed with professional services firm PricewaterhouseCoopers (PWC) to calculate expected costs of several types of compact cars, pitting battery-electric against internal combustion engines, plug-in hybrids and hybrid vehicles. Including cost of purchase, fuel, maintenance, federal tax credits and residuals, the data sho
    Read More
  • GE researchers developing at-home refuelling station for NG vehicles
    July 20, 2012
    In what could help fuel widespread adoption of natural gas-powered (NG) vehicles in the US and globally, GE researchers, in partnership with Chart Industries and scientists at the University of Missouri, have been awarded a programme through Advanced Research Projects Agency for Energy (ARPA-E) to develop an affordable at-home refuelling station that would meet ARPA-E’s target of $500 per station and reduce re-fuelling times from 5-8 hours to less than 1 hour. Natural gas prices are at an all-time low and t
    Read More
  • Electric boats and ships 2017-2027: Large market emerging, says IDTechEx
    January 13, 2017
    Analysts at IDTechEx have issued a new report, Electric Boats and Ships 2017-2027 looking at this fragmented but often highly profitable and growing sector. It says there are already over 100 manufacturers of electric boats and ships. The report finds that the market for hybrid and pure electric boats and ships will rise rapidly to over US$20 billion worldwide in 2027 for non-military versions. The recreational boat market is the largest and fastest growing electric marine market in sales number, followe
    Read More

Highlighted Content