METHOD FOR THE DIAGNOSIS OF THERMAL RUNAWAY IN AN ELECTRIC BATTERY

A method for the diagnosis of thermal runaway in an electric battery (1) having at least one stack (2) of electrochemical cells (3) connected to one another in series. The diagnosis method provides for the steps of: measuring a first electric voltage (V) at the ends of each electrochemical cell (3); measuring a second electric voltage (V) at the ends of the entire stack (2) of electrochemical cells (3); calculating a difference between the second electric voltage (V) and the sum of all first electric voltages (V); and diagnosing a thermal runaway of an electrochemical cell (3), if the first electric voltage (V) of the electrochemical cell (3) is smaller than a first threshold value (TH1) and if, simultaneously, the difference between the second electric voltage (V) and the sum of all first electric voltages (V) is smaller than a second threshold value (TH2).