NOVI, MI – Nissan wants to be able to collect and analyze battery health data with the next generation of its Carwings app for its Leaf electric vehicle.

The automaker was caught by surprise two years ago when Leaf owners in hot-weather states, including Arizona, began experiencing what they said was premature degradation of their cars’ air-cooled lithium-ion battery packs. It evolved into a major drama in the EV world, as Leaf owners thought Nissan should have been more proactive to their initial complaints.

After executives met with affected Leaf owners in Arizona Nissan bought back some of the EVs and enhanced the car’s warranty to repair or replace a Li-ion battery pack that loses more than three of its 12 bars, or roughly 30% of its capacity, in five years or 60,000 miles (96,561 km).

If Carwings were able to gauge the health of the Leaf’s Li-ion pack, the automaker could head off such a problem in the future, Robyn Williams, senior marketing manager-vehicle connected services for Nissan North America, tells WardsAuto here at a recent telematics conference.

“Perhaps in the future we’ll be able to give much more specific information back to the customer about the degradation of the battery and about the battery life, and even make recommendations on their driving or charging styles to help elongate their battery life,” she says.

Right now Carwings can tell users, and Nissan, fairly typical EV metrics such as battery state-of-charge and where the nearest charging station is located, as well as allow a user to begin battery charging remotely.

With data collected by a future version of Carwings, Nissan could detect “certain signals within the battery to predict what the battery life is going to be,” Williams adds.