Research Reveals: Interpretation of EV Battery Study May Not Align with Facts Cited
In a recent study published in the prestigious journal Nature, researchers have shed light on the effects of driving style on the lifespan of electric vehicle (EV) batteries. The study, which compared constant-current cycling with dynamic charging and discharging profiles from real-world EV use, has sparked a lively debate about the best way to treat an EV battery for long-term health.
Battery experts advise against sporty driving for the long-term health of an EV battery. Driving hard increases energy consumption, leading to more charging cycles, battery stresses, and accelerated aging. A study on a Nissan Leaf, for instance, observed a range loss of only 8 miles after four years and 107,000 miles, despite the vehicle often being parked for long periods with a full charge. Similarly, a recent German study found that a VW ID.3 lost only 8 miles of range after the same duration and mileage, despite almost always being charged to full.
The misinterpretation of the study's findings has led some to believe that driving fast or aggressively can extend battery life. However, this is far from the truth. Battery diagnostic specialists from Aviloo conducted field tests on 402 identical EVs and found that driving enthusiastically shortens a battery's lifespan. Driving 100,000 km with economical driving roughly corresponds to the battery load of 110,000 km with an aggressive driving style, according to Aviloo.
The study found that batteries subjected to constant-current tests aged more rapidly than those subjected to dynamic discharging. This supports the notion that real-world driving patterns, with their dynamic charging and discharging profiles, are beneficial for battery longevity.
Nikolaus Mayerhofer from Aviloo stated that driving efficiently can save around 10% of energy in the life cycle of an EV. To maximise an EV's battery life, Aviloo advises avoiding fast-charging, charging over 80 percent, and leaving a car with a ton of juice in it for long periods.
The high cost of EV battery replacement, even though prices have fallen, makes it important for owners to look after their batteries by driving and charging carefully. Breakthrough EV battery technology could potentially charge in minutes and cross a continent, although this is not directly related to the study discussed in the article.
In conclusion, the study highlights the importance of driving efficiently to prolong the life of an EV battery. The debate about the best way to treat an EV battery for long-term health is far from over, but the evidence points towards a more conservative driving style for optimal battery longevity.
