SYSTEM AND METHOD FOR MEASURING THE ENTROPIC HEAT COEFFICIENT OF A BATTERY

The present invention concerns a method (200) and system (110) for automatically estimating an entropic heat coefficient (hereafter "EHC") of a battery (120), the method comprising:a) receiving or acquiring (210) a current, voltage, and temperature of the battery in function of the time, wherein said current, voltage and temperature have been measured simultaneously during a constant charge and discharge cycle;b) receiving or acquiring (220) an open-circuit voltage, hereafter "OCV", of the battery as a function of its state-of-charge, hereafter "SoC";c) feeding (230) said current, voltage and temperature in function of the time and said OCV in function of the SoC in an identification algorithm based on a battery thermal model, said identification algorithm being configured for determining said EHC as a function of the SoC, wherein, for said determination, the EHC is defined as a function of N+1 real parameters a0,...,aN, wherein the identification algorithm is configured for determining the value of each real parameter a0,...,aN, by minimizing a difference between an estimated battery temperature and said measured temperature, wherein the estimated battery temperature is obtained by modeling, with said battery thermal model, a heat generated by the battery during said charge and discharge cycle;d) outputting (250), by said identification algorithm, the determined EHC as function of the SoC.