Tesla Supercharging Not Dangerous To Batteries After All!



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For a few years now, it has been suggested to not quick cost electrical autos an excessive amount of, that doing so might result in fast degradation of your EV’s battery. It’s all the time been unclear how a lot this issues, although, and particularly throughout completely different autos with completely different battery administration programs. At occasions, Tesla CEO Elon Musk and former CTO JB Straubel have stated to not fear about it, and to Supercharge as a lot as you want. At different occasions, it’s been really helpful that you just solely do it on street journeys and that you just not depend on it for all of your charging. As somebody who has finished 85% of my charging at Superchargers up to now 12 months (and 90% up to now month), I’ve in fact hoped that “it’s not such a giant deal” is the proper reply. In line with current analysis, that’s certainly the case!

One key level is one thing I discovered from Mark Z. Jacobson years in the past throughout dinner is that batteries degrade fairly a bit early on, when they’re new, after which degradation is usually minimal for years (and even effectively past a decade), after which there’s one other important drop a lot in a while. JB Straubel estimated a number of years in the past that Tesla EV batteries would most likely retain good capability (not see greater than 30% capability degradation) for 15+ years. Recurrent Auto’s Liz Najman summarizes it like this: “Degradation shouldn’t be linear. We’re together with battery degradation curves that illustrate how effectively these batteries maintain up over time. There’s some drop at first then it ranges out for an extended interval.”

Najman can also be trustworthy about the truth that we nonetheless don’t know loads. “How lengthy is that EV battery going to final? The one easy reply is that we don’t know for positive as a result of electrical automobiles haven’t been round lengthy sufficient for us to inform. The perfect we will do is observe the obvious degradation in these automobiles on the street.” That’s what I usually say when individuals ask (or just remark) about EV battery lifespan. She provides:

“Arising with an actual reply to what a battery lifetime is sophisticated as a result of:

Batteries are sophisticated programs. We are able to’t observe them straight, and need to depend on a pc interface to provide us details about their state of well being, state of cost, and extra.
We all know extra about battery cells than battery packs. A lot of the rigorous scientific assessments on lithium ion batteries are finished on particular person battery cells, not the high-tech programs utilized in EVs.”


The helpful factor with Recurrent Auto is that it’s obtained a neighborhood of 15,000 electrical automobiles. In that article, you may dig in way more to how batteries have degraded in several EV fashions.

Extra lately, although, Recurrent Auto printed one other article simply on the impression of EV quick charging. Blake Hough begins the article like this: “One of many largest issues with quick charging is that it may, theoretically, injury the battery by pushing an excessive amount of vitality into your automotive too shortly. This might result in irreparable, long-term vary loss.” Nevertheless, to check this out, researchers dug into the impact of quick charging on 12,500 Tesla autos. Whereas the corporate nonetheless recommends that occasional quick charging is ok however not essentially frequent quick charging, the outcomes confirmed no statistically important distinction in battery degradation between Tesla Mannequin 3 autos that charged a minimum of 90% of the time utilizing Superchargers and Mannequin 3 autos that charged not more than 10% of the time utilizing Superchargers. Yay for me! The identical was the case for Mannequin Y autos.

Apparently, trying on the graphs (Mannequin 3 right here and Mannequin Y right here), Mannequin 3 autos and particularly Mannequin Y autos that hardly ever Supercharged had misplaced extra battery capability, or vary, over the identical time frame as Mannequin 3 autos and Mannequin Y autos that ceaselessly Supercharged. Nevertheless, do not forget that the distinction isn’t statistically important, so don’t learn into that. I’m simply highlighting this stunning consequence to emphasise that the alternative shouldn’t be a priority.

The difficulty is that a lot analysis on battery degradation has been finished on battery cells, inherently ignoring the work battery pack producers and automakers have finished to restrict any impact of warmth and quick charging on cells. It seems, these efforts have truly paid off. Cells are protected, and quick charging doesn’t appear to have any impact on the long-term well being of batteries. “Briefly, the sturdy thermal, voltage, and battery administration programs that EV makers have invested in do defend their batteries from injury with routine quick charger use,” Hough writes.

Once more, it is a reduction for these of us who’ve relied on quite a lot of Tesla Supercharging, however I’m nonetheless not encouraging individuals to go quick cost extra — when you don’t have purpose for it. We had no residence charging choices with my 2019 Tesla Mannequin 3 for a few years. Prior to now couple of years, in the meantime, I’ve simply not been desperate to cost at residence as an alternative of utilizing free Supercharging — despite the fact that that might be extra handy. In the end, although, after 4+ years of this, I can lastly be fully guilt free when utilizing the Superchargers! I additionally discover consolation in the truth that these are nonetheless 150 kW Superchargers, which aren’t as quick as newer ones (however nonetheless a bit quicker than I’d typically choose).

What do you concentrate on this analysis and the overall idea and dialogue of the subject? Do you see the findings as convincing sufficient — for now, a minimum of? Or do you see some flaws within the analysis and findings? I’m blissful to listen to all opinions, so long as you don’t spoil my newly elated view of Supercharging!


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