Wednesday, 13 October 2021 17:49

How Much Range Does an Electric Car Lose Each Year?

Written by Andrew Lambrecht, InsideEVs


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While electric vehicles have been proven to have considerably lower ownership costs compared to their ICE counterparts, battery longevity remains an equivocal subject.

Similar to how consumers ask how long the batteries can last, manufacturers often question the same subject.


"Every single battery is going to degrade every time you charge and discharge it," Atlis Motor Vehicles CEO Mark Hanchett told InsideEVs


Essentially, it's inevitable your electric car battery, or any rechargeable Li-ion battery, will lose the capacity it once had. However, the rate at which it'll degrade is the unknown variable. Everything ranging from your charging habits to the very chemical makeup of the cell will affect your EV battery's long-term energy storage. 


While many factors are at play, there are four main elements that assist in further degrading EV batteries. 


Fast Charging 


Fast charging itself doesn't necessarily cause accelerated battery degradation, but the increased thermal load can damage the internal components of the battery cell. The damage of these battery internals leads to fewer Li-ions being able to transfer from the cathode to the anode. However, the amount of degradation the batteries face is not as high as some may think.


Earlier last decade, the Idaho National Laboratory tested four 2012 Nissan Leafs, two charged on a 3.3kW home charger and the other two strictly charged at 50kW DC fast stations. After 40,000 miles, the results showed the one charged on DC only had 3% more degradation. That will still shave your range, but the ambient temperature seemed to have a far greater effect on the overall capacity. 


Ambient Temperatures


Colder temperatures can slow down an EV's charge rate and temporarily limit the overall range. Warm temperatures can be beneficial for...

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