Chalmers Study Maps How Reconfigurable Battery Packs Could Sidestep Weak Cells and Extend EV Life

A fresh modeling study out of Sweden suggests that wiring electric-vehicle battery packs so they can be dynamically rearranged could meaningfully stretch pack longevity and trim lifetime costs. The work comes from Chalmers University of Technology, where a research team partnered with PHINIA and Scania, and it appeared in Nature Communications.

The problem the researchers tackle is a familiar one for pack engineers: a battery is not a single uniform object but a large collection of interlinked cells, and those cells do not deteriorate at the same pace. Over a pack’s service life, the weakest or fastest-aging cells can drag down the usable capacity and performance of the entire assembly, because conventional packs are locked into a fixed electrical layout.

Reconfigurable architectures offer an alternative by allowing switches or power electronics to change how cells are grouped and connected on the fly, so a flagging cell can be routed around rather than left to degrade the whole string. What had been less clear is how much real-world benefit this flexibility delivers, and that is precisely what the Chalmers-led team set out to quantify through modeling.

The project’s industry partners give it an applied flavor. Scania brings heavy-duty commercial vehicle experience, where battery lifetime and total cost of ownership weigh heavily on fleet economics, while PHINIA contributes powertrain and electronics expertise. By assessing both extended battery life and reduced lifetime cost, the study frames reconfigurability not merely as a technical novelty but as a potential lever on the economics of electrified transport. The findings add to a growing body of research suggesting that how cells are managed and connected can matter as much as the chemistry inside them.