Abstract: The invention is a method of using a system for storing electrical power which minimizes aging of the system. An optimal profile of use is defined to minimize the aging of the system. An initial profile of use is chosen. A dynamic model of aging of the system is defined which modes the losses of electrical capacity and/or power of the system as a function of time. Next, by use of the dynamic model of aging, an aging indicator is determined for the system after this profile has been applied to the system. Last, the profile of use is modified and the step of calculating the indicator is reiterated until a minimal aging indicator is obtained. The optimal profile is then applied to the system for storing electrical power.

Abstract: The invention relates to a method of determining the residual capacity of an electrochemical cell for an electrical energy storage using a no-load voltage model of the cell which is parameterized so that the parameter represents the aging of the cell. Parameterizing the model is achieved from a series of measurements performed on the battery, comprising at least a voltage measurement, a temperature measurement and a current measurement of the cell.

Abstract: The present invention relates to an optimized method for thermal management of the surface and core temperature of an electrochemical system under nominal and extreme operating conditions. For applications relating to hybrid and electric vehicles, the thermal state (T) at the surface and in the core of the constituent elements of the system has to be controlled in order to prevent thermal runaway, fire and explosion risks. Reconstruction of the internal characteristics that are not directly measurable, such as the temperature in the core of the elements, is carried out using an electrical, thermal and thermochemical runaway model of the battery.

Abstract: The present invention relates to a method of estimating the internal state of an electrochemical system by a zero-dimensional (0D) electrochemical mathematical model for estimating the characteristics of a battery that are not directly measurable during operation thereof. For applications relating to hybrid and electric vehicles, the most significant internal characteristics are the state of charge (SoC), the state of health (SoH) and the thermal state (T). Reconstruction of the internal characteristics is achieved using a mathematical model of the battery. The method can be used with the operation of the battery itself (real time) with a concentrated-parameter (0D) or off-line mathematical model, for calibration, an optimization or a validation of management and estimation strategies. The method allows simulation of the thermal and electrical behavior of a battery.

Abstract: The present invention relates to a method of estimating the internal state of an electrochemical system by a zero-dimensional (0D) electrochemical mathematical model for estimating the characteristics of a battery that are not directly measurable during operation thereof. For applications relating to hybrid and electric vehicles, the most significant internal characteristics are the state of charge (SoC), the state of health (SoH) and the thermal state (T). Reconstruction of the internal characteristics is achieved using a mathematical model of the battery. The method can be used with the operation of the battery itself (real time) with a concentrated-parameter (0D) or off-line mathematical model, for calibration, an optimization or a validation of management and estimation strategies. The method allows simulation of the thermal and electrical behavior of a battery.