Electric battery e.g. Nickel metal hybrid battery, power dissipation estimating device for e.g. electric vehicle, has module for calculating dissipated power from difference between thermodynamic equilibrium voltage and voltage at terminals

摘要

The device has a dissipated power evaluation unit (36) with a determination module (46) for determining a thermodynamic equilibrium voltage of a battery (10) according to the estimation of a current state of charge and temperature of the battery. The unit (36) has a calculation module (54) for calculating the dissipated power from a difference between the thermodynamic equilibrium voltage and a voltage measured at battery terminals. The thermodynamic equilibrium voltage is measured at the battery terminals in a thermodynamic equilibrium state. Independent claims are also included for the following: (A) an estimator of charge state of a battery (B) a process for estimating power dissipated by a battery, adapted to be implemented in a power dissipation estimating device.