Electrical energy storing system for e.g. electric vehicle, has switching device connecting compensation cell to storage arrangement, so that difference of potential between storage arrangement and another storage arrangement is minimized

摘要

The system (100) has an energy storage arrangement (110) with energy storage cells (111) connected in series, and another energy storage arrangement (120) with energy storage cells (121) connected in series and parallel to the former energy storage arrangement. A switching device (140) connects a compensation energy storage cell (131) to the latter energy storage arrangement, so that a difference of potential between the energy storage arrangements is minimized. The energy storage cells and the compensation energy storage cell exhibit same voltages.