Electric car batteries last longer than expected (study) – ecomento.de

Using Firefox's built-in translation...

> The key results: In the first approximately 30,000 kilometres, the loss of capacity is accelerated, and the so-called state of health (soH) drops relatively quickly from 100 to around 95 percent. With increasing mileage, real degradation decreases. According to the Electrive portal, Aviloo data from the 7,000 vehicles showed a (average) SoH of around 90 percent at 100,000 kilometres. According to this, the trendline is almost horizontal, between 200,000 and 300,000 kilometres, it is almost stable – and is well above the 70 to 80 percent of the battery guarantee. In fact, it is rather 87 percent.

Seems pretty consistent with ICE engines, where you can expect roughly a 5-10% loss in efficiency once you get over 100k miles

So basically in other words what this means - is that if battery capacity was over-provisioned by mere 13 percent with battery firmware keeping it essentially hidden - then in effect there would not be any degradation at all.

That raises the question og whether they study factored this into their analysis. Don’t carmakers already overprovision?

They already over-provision to prevent users from charging the last few percent. That top end is where the most significant degradation happens when charging.

I don't think I realized that ICE engines had this kind of degradation. What causes this? Seals and parts loosening as they break in? Some loss of efficiency in the fuel mixing/burning process?

Like SSDs, the more expensive the drive the more extra storage cells it's got for the controller to use later

I don’t think it’s much besides people becoming more lax on maintenance as the car ages.

Most people are going to adhere to the oil change schedule no matter what. But if the schedule is calling for new spark plugs every 60,000 miles it will almost certainly happen at 60,000 miles but maybe not at 120,000. Instead people will probably wait until something is going wrong enough that a mechanic tells them they have to replace them.

Or things that don’t last forever but don’t have a set replacement schedule. The oxygen sensor, PCV valve, etc. I just replaced the PCV valve for the very first time on a Subaru with 130k miles on it and the mpg jumped by 2-3 immediately.

wow firefox has built in translation? i didn't know that.

Some do, some do not. AFAIK Tesla does not. My Ford Lightning definitely does.