METHOD FOR ESTIMATING THE NON-MEASURABLE CHARACTERISTICS OF AN ELECTROCHEMICAL SYSTEM

摘要

The present invention relates to a method of estimating the internal state of an electrochemical system with the aid of mathematical models making it possible to manage an electrochemical battery during its operation, and in particular to estimate the characteristics of the battery which are not directly measurable. For applications relating to hybrid and electric vehicles, the most interesting internal characteristics are the state of charge (SoC), the state of health (SoH) and the thermal state. The reconstruction of the internal characteristics is done through the use of mathematical models of the battery. The method can be used in a manner synchronous with the operation of the battery itself (real time) by virtue of a reduced or off-line mathematical model, for example within the framework of a calibration, an optimization or a validation of the management and estimation strategies. Finally the method can be useful for the rating of the battery, which must be optimized as a function of the energy and thermal management strategies.