2026-10-08 チャルマース工科大学
Smarter battery packs can give electric car batteries a longer life. The illustration shows a reconfigurable battery pack where all cells have their own switches, which are controlled by a battery management system (blue lines). A weak cell (dark) can be bypassed while the current (yellow) continues through the rest of the pack.
The illustration has been created by Albert Škegro, Chalmers University of Technology, Sweden, with the help of AI.
＜関連情報＞
- https://news.cision.com/chalmers/r/electric-vehicle-batteries-get-a-longer-lifespan-when-weak-cells-are-bypassed,c4405919
- https://www.nature.com/articles/s41467-026-74951-8
- https://tiisys.com/blog/2026/09/10/post-203989/
電気自動車用バッテリーパックにおける寿命とコストに関する動的再構成のシステムレベル評価 System-level assessment of dynamic reconfiguration for lifetime and cost outcomes in electric vehicle battery packs
Albert Škegro, Torsten Wik, Bo Bijlenga, Alexander Bessman & Changfu Zou
Nature Communications Published:08 July 2026
DOI:https://doi.org/10.1038/s41467-026-74951-8
Abstract
The electrification of transport relies heavily on lithium-ion batteries, yet conventional fixed-configuration battery packs suffer from structural inefficiencies such as cell-to-cell variability and premature failure. Dynamic battery reconfiguration, enabled by intelligent control of switching hardware around individual cells, provides an alternative pack architecture. Here we present a systematic, battery technology-agnostic evaluation of the lifetime and economic benefits of reconfigurable battery packs using a statistically grounded framework based on detailed cell modelling across diverse design and usage conditions. We show that reconfigurable battery packs can extend battery lifetime by over 20%, particularly in high-voltage applications such as electric trucks and long-range passenger vehicles. Despite higher upfront costs, reconfigurable packs can reduce lifetime cost by deferring replacements and retaining greater residual value. A sensitivity analysis identifies robust thresholds for economic viability: battery capacities above approximately 50 kWh, annual driving distances below 12,150 km, and additional upfront costs under 7.16%. These findings position dynamic reconfiguration as a scalable, cost-optimised architecture for next-generation battery platforms, and provide a quantitative foundation for future hardware design, management software, and life-cycle sustainability assessments.
