Method for Determining the Respective Temperature of Several Battery Cells of a Vehicle Battery Via Extrapolation of a Measured Temperature; Control Device and Vehicle Battery

A method for determining respective temperatures of a plurality of battery cells includes determination of measured values including a first voltage of a first battery cell, a second voltage of a second battery cell, and a respective current that flows through the first and second battery cells. A first measured resistance of the first battery cell and a second measured resistance of the second battery cell is determined from the measured values. A reference resistance is determined. A first resistance relationship from the first measured resistance and the reference resistance and a second resistance relationship from the second measured resistance and the reference resistance are determined. A measured temperature of the first battery cell is determined. A computed temperature of the second battery cell is determined based on the measured temperature of the first battery cell, the first resistance relationship, and the second resistance relationship according to a predetermined requirement.