Charging regime at any state of charge using the first derivative of temperature and the first and second derivative of voltage with respect to time

摘要

A battery control module for a rechargeable battery includes a voltage measuring module that measures a voltage of the rechargeable battery and that estimates a first derivative of the voltage with respect to time (dV/dt) and a second derivative of the voltage with respect to time (d²V/dt²). A charge control module estimates a maximum charging current based on dV/dt. A current control module limits a charging current of the rechargeable battery to the maximum charging current and turns off the charging current when d²V/dt² is greater than dV/dt.