Battery module , comprising: a control unit , a plurality of battery cells arranged side by side connected electrically in series or in parallel, and a first and second plurality of temperature sensors , wherein the first plurality of temperature sensors is connected electrically in a first sensor unit that is connected to a first measuring channel of the control unit , and the second plurality of temperature sensors is connected electrically to a second sensor unit that is connected to a second measuring channel of the control unit , wherein the control unit is arranged to measure a resistance of the first sensor unit separately from a resistance of the second sensor unit , and wherein the first sensor unit and the second sensor unit appear each as a single temperature sensor configured to measure an average temperature, characterised in that a mathematical model is implemented in the control unit , wherein the mathematical model is configured for estimating an upper limit of a temperature of a single battery cell, and/or for checking the plausibility of the measured resistances, and/or for performing calculations based on an assumed specific temperature distribution, the control unit is arranged to calculate a maximum temperature within the battery module by dint of said mathematical model, when the control unit measures different temperatures in the first measuring channel and in the second measuring channel , and the first and second plurality of temperature sensors are arranged such that each battery cell is equipped with one temperature sensor and the temperature sensors of the first sensor unit and the temperature sensors of the second sensor unit are arranged alternately on adjacent battery cells of the battery module . a control unit , a plurality of battery cells arranged side by side connected electrically in series or in parallel, and a first and second plurality of temperature sensors , wherein the first plurality of temperature sensors is connected electrically in a first sensor unit that is connected to a first measuring channel of the control unit , and the second plurality of temperature sensors is connected electrically to a second sensor unit that is connected to a second measuring channel of the control unit , wherein the control unit is arranged to measure a resistance of the first sensor unit separately from a resistance of the second sensor unit , and wherein the first sensor unit and the second sensor unit appear each as a single temperature sensor configured to measure an average temperature, characterised in that a mathematical model is implemented in the control unit , wherein the mathematical model is configured for estimating an upper limit of a temperature of a single battery cell, and/or for checking the plausibility of the measured resistances, and/or for performing calculations based on an assumed specific temperature distribution, the control unit is arranged to calculate a maximum temperature within the battery module by dint of said mathematical model, when the control unit measures different temperatures in the first measuring channel and in the second measuring channel , and the first and second plurality of temperature sensors are arranged such that each battery cell is equipped with one temperature sensor and the temperature sensors of the first sensor unit and the temperature sensors of the second sensor unit are arranged alternately on adjacent battery cells of the battery module . <EOS>