electrek:

While colder weather negatively affects the range of Tesla electric vehicles and electric vehicles in general, it may actually be good for the long-term longevity health of EV battery packs, according to a new study.

Recurrent, which has access to data from over 12,500 Tesla vehicles in the US through its software service, has been releasing interesting new looks into Tesla batteries based on that data.

Last month, we reported on the data showing that Tesla battery longevity is not negatively affected by frequent Supercharging – putting to rest a long-standing myth about EVs.

Now, the firm is using its data to show how different climates can have an impact on battery longevity.

Recurrent assigns a “range score” to each battery it tracks; it is basically the percentage of range retention. For example, a Range Score of 90 would mean that the battery pack has retained 90% of its original range.

The firm has found that Tesla vehicles in colder and coastal climates have, on average, a better Range Score than Tesla vehicles in hotter climates in the US:

Extreme cold negatively affects the range of electric vehicles as active thermal management spends a lot of the pack’s energy to regulate the temperature. That’s well known.

But it’s new information, for me at least, that for the longevity of the battery pack, colder temperatures might actually be good – or at least slightly better than hotter climates.

Recurrent gives us a vague explanation as to why that might be:

Batteries are a lot like people – always aging. We can do things to reduce these effects, like exercise and sleep, or things that accelerate them, such as smoking and tanning. The same is true of batteries, and being exposed to heat is a lot like smoking cigarettes. Environmental heat contributes extra energy to the electrochemical reactions in the battery, which can accelerate unwanted chemical reactions that age the battery prematurely. The generally accepted threshold for accelerated battery degradation is around 30 degrees C, or around 86 degrees F. 

Hopefully, this information could be useful to some Tesla owners.

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MuskWire TLDR:

A new study suggests that while colder weather can negatively impact the range of Tesla electric vehicles and other electric vehicles, it may actually be beneficial for the long-term health of EV battery packs. Data from over 12,500 Tesla vehicles in the US, collected by Recurrent through its software service, reveals that Tesla vehicles in colder and coastal climates tend to have better battery longevity than those in hotter climates. Recurrent assigns a “range score” to each battery based on the percentage of range retention, and colder temperatures seem to result in higher scores. The study explains that while extreme cold can reduce the range of electric vehicles due to the energy spent on regulating temperature, colder temperatures might be better for the longevity of the battery pack compared to hotter climates. The explanation provided is that heat accelerates unwanted chemical reactions in the battery, leading to premature aging. This information could be useful for Tesla owners looking to optimize their battery performance.