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Fast charging won't degrade your EV battery faster, extensive study finds

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Ro, 29 August 2023

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Recurrent Auto just published research on fast charging and how it affects battery health in the long run. And the short version is this - fast charging doesn't seem to impact battery health at all.

Admittedly, the research only involves Tesla cars - Model 3 and Model Y. However, the data is collected from 12,500 vehicles, so we can have a lot of confidence in the conclusions.

Recurrent compared the battery health of vehicles that used fast charging at least 90% of the time and vehicles that used it in less than 10% of the time. And as it turns out, the two groups have no statistical difference.

Battery degradation: Model Y Battery degradation: Model 3
Battery degradation: Model Y • Model 3

The article outlines certain scenarios in which fast charging would be detrimental to the battery, like charging in extreme temperatures (either low or high) and in a low or high battery charge state. Luckily, all EV makers have invested in mitigating those scenarios with software and hardware solutions.

For instance, pre-conditioning of the battery is extremely important as it brings the battery cells to optimal temperature for charging. Additionally, the software regulates the charging speed when the battery reaches 80% and slows it down to reduce degradation. In fact, Recurrent suggests using a slower tier 2 public charger as it may actually be faster and cheaper for those final few KWs.

Source

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Reader comments

  • Fearghast
  • ps1
  • 29 Aug 2023

You know this topic has one HUGE issue, other than Tesla, Toyota and few others, pretty much every other manufacturer is fine with subpar cooling / heating solutions for their batteries. So yeah, fast charging does not degrade the battery in any si...

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Total reader comments: 1

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