Rechargeable batteries in modern electric cars can last much longer than had been calculated or determined in older studies, Munich researchers recently wrote: Technical advances in recent years bear witness to this, and manufacturers would certainly have data more up-to-date, but not publish them. The team from the Technical University of Munich therefore bought batteries from a VW ID.3 and tested them themselves – and found that the capacity was still almost 90% even under extreme stress after 160 000 kilometers. Soon after, Tesla reported similarly high values even after 320,000 kilometers for the Model S and Model X. And during the week, Renault also provided reassuring battery data for its popular Zoe electric car.
Tesla saves CO2 after 10,500 km
Such results have an impact on the battery life or the mileage that customers can count on. However, they also play a major role in determining the calculated CO2 emissions per kilometer over the entire service life. Because the majority of it is produced in electric cars when the battery is made, and the longer it lasts, the lower the total emissions per kilometer. This in turn plays an important role in choosing the right financing policy for the reduction of CO2 emissions in transport.
In its current impact report, Tesla, for example, calculates that electric cars will be scrapped after 320,000 kilometers in the United States and after 240,000 kilometers in Europe. The reason for this, as the Model S and Model X data show in the same report, is not that the batteries would then be unusable. But even disregarding possible longer use in electric cars themselves or in stationary operation, an imaginary mix of Model 3 and Model Y in the United States should cause fewer emissions of CO2 after only 10,500 kilometers than a comparable combustion engine.
At Volkswagen, equally long running times and thus clearer advantages for electric cars should result if the results of the Munich researchers with the ID.3 are confirmed and included in such evaluations. And with Renault, another manufacturer has just been added whose experience suggests that the CO2 balance of electric cars looks even more positive overall than according to previous data.
Renault with battery data for the electric car Zoe
99% of all batteries ever sold for the Renault Zoe in Germany are still fully operational and have at least 70% of their original capacity, the company announced on Tuesday. This applies to the first generation with a capacity of 22 kilowatt hours as well as the current one with 52 kilowatt hours. The data therefore goes back a long way since the first examples of the best-selling electric car in Europe in 2020 (see photo above) were already delivered in 2013. According to Renault, the minimum breakdown rate also includes vehicles that are already out of the battery warranty of eight years or a maximum of 160,000 kilometres. Here too, neither customers nor climate protectors have to take into account that the battery of the electric car will subsequently discharge quickly.