An amateur measurement of the battery capacity made by one of the creators on YouTube shows that after a year it is significantly degraded. Official testing by VW shows that it gets even worse.
The degradation of battery capacity affects every electrician
Battery capacity is a problem that each of us faces in our phones every day. With time it turns out that “a few months ago the battery lasted all day and now it barely lasts until evening”. The same problem is faced by owners of electric cars, whose cells – as in the case of smartphones – lose their efficiency over time.
But how serious is battery degradation over time? The creator of Battery Life decided to check it on YouTube, who has been the owner of the electric VW ID.3 for over a year (with the current mileage of approx. 25,000 km).
Watch the video in which Battery Life talks about battery degradation in VW ID. 3
The test carried out in amateur conditions (without professional measuring devices) shows that after a year and 22,500 km the battery has lost 7.5% of its original capacity. However, as you can guess – the result obtained in “home” measurements, according to many commentators, is unreliable and has a negative impact on the perception of electricians.
The owner of VW ID.3 decided to repeat his test – this time at an authorized VW service center. It turns out that the results are even worse than expected.
The test, which was carried out by an authorized VW service station (2 months and 2,500 km after that by the owner), showed that battery capacity decreased by 8%. This measurement cannot be questioned, but it is still a source of debate: in 2 months and 2,500 km of mileage, has the battery lost as much as 0.5% of its capacity?
Could this capacity drop be a concern?
Yes and no. On the one hand, the owner of the Battery Life channel himself explains that from the beginning of owning a car did not fully follow the manufacturer’s recommendations (he did not load the car from 10 to 80%, and up to 100%), therefore the loss of efficiency could have been greater.
On the other hand, however it is completely normal for a car’s battery capacity to degrade by 5-8% during the first year of use. It is only in the second and third year that the cells should maintain the efficiency at a similar level, as evidenced by, inter alia, chart published by Tesla. It shows that the greatest loss in performance occurs in the first 50,000 km, and remains at a similar level thereafter.
Anyway – I myself (despite my sympathy for electricians) think that even the 8% decrease in efficiency after a year is too much for the smallest cars, which can only “boast” of only 200 km range, and with a recommendation to charge to 80% it drops on up to 160 km (in ideal weather conditions, of course).
After all, the study by Battery Life is a single case, not a representative group. It may turn out that after another 2-3 years the degradation will be even greater or… it will not be at all.
How do you think – do batteries in electrics have a chance to be developed so that they are no longer the biggest obstacle for their potential buyers? Let me know in the comments.
Source: YouTube @Battery Life