Electric vehicle (EV) batteries benefit from occasional high-acceleration driving, which can extend their service life significantly, according to new research from Stanford University.
The two-year study, published in Nature, challenges conventional battery testing methods and suggests that dynamic discharge—common during acceleration—reduces degradation.
The Stanford research team compared static and dynamic discharge patterns using 92 battery cells composed of silicon oxide-graphite and nickel-cobalt-aluminium chemistry.
The cells were tested at a constant temperature of 35 degrees Celsius and subjected to realistic load profiles based on vehicle applications such as autonomous transport, buses, and commercial fleets.
“In this study, we systematically compared dynamic discharge profiles representative of electric vehicle driving to the well-accepted constant current profiles,” the researchers wrote. “Surprisingly, we found that dynamic discharge enhances lifetime substantially compared with constant current discharge.”
The team found that batteries operated under dynamic loads—those that mimic real-world EV acceleration—lasted up to 38% longer than those tested under constant current conditions. This translates into a potential increase of more than 300,000 kilometres in vehicle range over the battery’s service life.
The study emphasizes the need for battery evaluations to use realistic driving patterns rather than static lab conditions. “Specifically, for the same average current and voltage window, varying the dynamic discharge profile led to an increase of up to 38% in equivalent full cycles at end of life,” the team reported.
Researchers argue that the findings should reshape how ageing mechanisms in EV batteries are understood at the chemical, material, and cell level.
Their conclusions also suggest that manufacturers could consider incorporating dynamic profiles in future battery testing and design frameworks to better reflect real-world performance.