Unique chemistry - a big boost to EV batteries

May 22, 2017

EV vehicules

How do you get a 320km range from an electric vehicle, propulsion of 0-96km/h in less than seven seconds, and the ability to charge it in 30 minutes for a range up to 145km? You use a nickel-rich lithium ion battery!

Powering the Bolt EV is a newly designed 60kWh lithium battery which resides in the floor of the car from the front foot well to back of the rear seat.

The nickel-rich lithium ion chemistry provides improved thermal operating performance over other chemistries, which requires a smaller active cooling system for more efficient packaging. The chemistry allows the Bolt EV to maintain peak performance in varying climates and driver demands.

Improved power and energy

“You usually have a battery cell that delivers either the desired levels of energy or power, but not traditionally both. With this cell design and chemistry we were able to deliver a battery system with 160 kilowatts of peak power and 60 kilowatts hours of energy,” said Gregory Smith, Bolt EV battery pack engineering group manager.

The cells are arranged in a “landscape” format and each measures in at only 100mm high and 338mm wide providing improved packaging underfloor. The lower profile cell design enabled the vehicle structure team to maximize interior space.

“Being the leader in range and affordability means nothing if the car isn’t going to excite you each time you get behind the wheel,” said Josh Tavel, Chevrolet Bolt EV chief engineer.

“That’s why the team was tasked with delivering a propulsion system that would also make the Bolt EV an electric vehicle that owners would love to drive.”

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