1. Field of the Invention
The invention relates to a system for monitoring a plurality of capacitor cells connected in series in a capacitor module which are used as electrical energy stores in an energy storage device and which can be charged in same by a charge current flowing through all the capacitor cells or discharged by a discharge current.
2. Background Information
Capacitor cells connected in series of this type have the problem that their capacity can change due to aging processes or that parasitic discharging can occur and thus disproportionate voltages can ensue for the individual capacitor cells over time which ultimately have a negative impact on the capacitor module's capacity to store energy.
The object of the invention is thus to provide a system for monitoring such capacitor cells which prevents such problems caused by changes to the capacity of individual cells.