Smart Charging Algorithm Could Extend EV Battery Life by 23%

Researchers at Chalmers University of Technology in Sweden have developed a new charging algorithm that, in simulations, extended the lifespan of a lithium-ion battery cell by nearly 23% compared to conventional charging methods used in most EVs today. The algorithm adapts its charging behavior to the battery’s real-time state of health, rather than treating an aged battery like a new one. This ‘health-aware’ approach reduces stress on aging cells by adjusting current and voltage levels, with only a minimal increase in charging time—less than three seconds per session on average.

However, this is still early-stage research. The algorithm has been tested only on a single simulated cell at a constant temperature, not on a real battery or a full multi-cell pack. The results are promising but unverified in real-world conditions. The researchers believe the software could potentially be delivered through over-the-air updates to existing vehicle battery management systems, meaning no hardware changes would be needed—a key factor in its potential practicality.

The new method specifically targets Level 1 and Level 2 AC charging, which covers most home and workplace charging scenarios. Since the majority of EV owners charge overnight at home, this approach could deliver substantial battery preservation benefits to a large portion of EV drivers. For fleet operators—like taxi companies or delivery services—who charge vehicles multiple times daily, extending battery life by 23% could significantly improve their operational economics.

Nevertheless, significant work remains before this could impact drivers. The next steps include testing the algorithm on actual battery cells over several months, then validating it on battery packs with hundreds or thousands of cells that age unevenly. The simulation also used a constant 25°C temperature; real-world temperature fluctuations present additional challenges. The team acknowledges that adapting the algorithm to other battery chemistries will require further research. They have not yet engaged with automakers or regulators, but the proof-of-concept is clear, and hardware validation is the next hurdle.