Electrical energy store and method for closed-loop control of such energy store

摘要

In installations for generating alternative energy it is necessary due to the fluctuating availability of the alternative energy source to provide electrical energy stores which can temporarily store excess energy or can compensate for energy bottlenecks. The present invention relates to such an electrical energy store having a bidirectional DC/DC converter with a low-voltage side and a high-voltage side which can be connected via the high-voltage side to a DC bus and which has a switching hysteresis with a charging and/or discharge curve, wherein power consumption and/or power output are/is dependent on a voltage on the high-voltage side.

主权项

1. An electrical energy store comprising:
a plurality of cell stacks, each cell stack having a plurality of individual cells, and a plurality of bidirectional DC/DC converters, each of said plurality of bidirectional DC/DC converters having a low voltage side and a high voltage side, wherein a first cell stack and a second cell stack of said plurality of cell stacks are respectively connected to a first bidirectional DC/DC converter and a second bidirectional DC/DC converter, and the high voltage sides of the first bidirectional DC/DC converter and the second bidirectional DC/DC converter are connected to a DC bus and the first bidirectional DC/DC converter and the second bidirectional DC/DC converter have a switching hysteresis with a charging and/or discharging curve, power consumptions and/or power outputs which are dependent on a voltage on the high-voltage side of each of the first bidirectional DC/DC converter and the second bidirectional DC/DC converter.