Peugeot evaluating PowerGenix NiZn batteries for stop-start
August 7, 2013 by John Day
Nickel-Zinc (NiZn) battery developer PowerGenix said it has an innovation contract with PSA Peugeot Citroën Automobiles under which Peugeot will conduct a comprehensive evaluation of the use of PowerGenix’s NiZn batteries as a replacement for lead-acid in stop-start vehicles.
PowerGenix has developed and patented high-power, low-cost Nickel-Zinc batteries for hybrid electric vehicles as well as for industrial products and stationary storage applications.
According to the company, PowerGenix NiZn batteries outperform lead-acid and nickel-metal hydride (NiMH) batteries in a smaller and lighter form-factor, and avoid the higher cost and potential safety issues associated with lithium-ion (Li-ion) batteries.
“Peugeot has displayed impressive leadership in cutting emissions and adopting innovative technologies,” said Salil Soman, PowerGenix director of systems engineering. “We look forward to working together over the coming months to fully adapt and integrate our NiZn batteries into their vehicles.
“This is a promising milestone for NiZn, which is poised to capitalize on a rapidly expanding market for stop-start technology.” Soman added that PowerGenix is engaged at some stage of evaluation with most major automakers.
Micro-hybrid vehicles are gasoline or diesel-powered cars with automatic, battery-powered stop-start systems that shut off the engine while the vehicle is at rest and restart it instantly and automatically upon re-engaging the gas pedal.
Stop-start technology is a cost-effective and efficient means of optimizing fuel economy. Current estimates put stop-start efficiency improvements at around 5-8 percent, while next-generation systems may achieve savings as high as 12-15 percent.
Sustained fuel economy
Stop-start technology has already been widely deployed in Europe, where 70 percent of all vehicles sold by 2017 are expected to carry the system as a standard feature. Lead-acid batteries, the most common battery choice, are low-cost, easily available and relatively safe. NiZn batteries with higher energy density and higher charge acceptance could be an alternative choice offering a sustained fuel economy improvement.
Peugeot and PowerGenix will work closely together to verify several aspects of performance improvements, including high sustained charge acceptance, weight savings and service life improvements for use in stop-start vehicle applications.
Sizing, cost, life and safety
The firms will also investigate battery sizing, cost projections, in-service life evaluation and safety analysis of the batteries, with tests performed under wide temperature ranges to validate NiZn’s performance at extreme temperatures.
At completion of the contract term, PowerGenix NiZn batteries are expected to be fully tailored for Peugeot and ready for successful integration into vehicles.
“PSA Peugeot Citroën Automobiles is committed to reducing the ecological impact of our vehicles and maintaining our position as a leader in low emissions automobiles,” said Bernard Sahut, innovation team manager for PSA Peugeot Citroën.
“NiZn holds the potential to provide an ideal replacement for lead-acid by reducing the weight and CO2 emissions of our stop-start engine vehicles. This study marks PSA Peugeot Citroën Automobiles’s interest in working closely with PowerGenix to validate the promise of NiZn technology.”