Robert Boschgmbh

Philipp Hartmann

Philipp Hillenbrand

A method for the switching of a number of battery cells in a battery which is configured as an electrochemical storage device, wherein each of the battery cells is electrically connected to the battery in accordance with a corresponding first probability P, and is electrically disconnected from the battery in accordance with a corresponding second probability P, and wherein the battery cells are mutually connectable in series. According to the method, a performance factor Gi is calculated for each battery cell as a sum of a function, which, specifically, is linearly dependent upon a state of charge LZi of the corresponding battery cell, and a second function which, specifically, is linearly dependent upon a product of a current value of a current which flows in the corresponding battery cell when the corresponding battery cell is electrically connected to the battery and the internal resistance of the corresponding battery cell.

Method for the switching of a number of battery cells in a battery and battery system with a battery comprising a number of battery cell units, each comprised of a battery cell and a battery cell monitoring module associated with said battery cell

A method for connecting a plurality of battery cells of a battery, wherein the battery cells are each electrically coupled to the battery with a corresponding first probability and are each electrically decoupled from the battery with a corresponding second probability. A first quality factor is calculated for each battery cell depending on a state of charge and on a state of ageing of the corresponding battery cell. An average first quality factor, corresponding to an average value of the first quality factors of the battery cells, is also determined. A second quality factor is calculated for each battery cell as a function of the difference between the first quality factor of the corresponding battery cell and the average first quality factor. The first probability and the second probability are determined for each battery cell based on the second quality factor of the corresponding battery cell.

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Stuttgart, Germany

Philipp Hartmann