HELLA launches Nickel-Zinc evaluation for 48V mild hybrid vehicles
October 24, 2013 by John Day
HELLA has signed a product evaluation contract with Nickel-Zinc (NiZn) battery developer PowerGenix and will conduct real-world vehicle tests to evaluate the ability of NiZN batteries to meet the high-power requirements of 48-volt mild hybrid systems, while also reducing overall system complexity and cost.
“Nickel-Zinc could offer some unique benefits in 48-volt systems,” said Dr. Marc Nalbach of HELLA. “It’s inherently very safe and also promises to provide equivalent emissions reductions, but at a lower cost. We believe our evaluation will open up a lower cost product to our OEM customers interested in reaching the fuel economy gains offered by 48-volt mild hybrid systems.”
Micro hybrid vehicles are traditional 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 upon re-engaging the gas pedal. Mild hybrids take fuel economy one step further by allowing the engine to be turned off while coasting, which enhances the stop start application as well as enabling high power regenerative braking. In addition, a starter alternator motor is used to supplement the internal combustion engine with some level of power assist during acceleration.
High rate, high power capabilities are critical to the performance of 48-volt systems, but cost and complexity (safety) of Li Ion battery technologies capable of meeting such requirements pose the biggest challenge to their widespread adoption. Battery solutions such as NiZn offer a promising alternative, while meeting both the cost and technical performance targets of mild hybrids.
“HELLA has built a worldwide reputation for high quality automotive systems and innovative new technologies,” said PowerGenix’s Director of Business Development, Salil Soman. “We look forward to collaborating to demonstrate that NiZn is capable of meeting all the needs of mild hybrids while offering considerable improvements in cost.”