Method for evaluating the state of charge of a battery

摘要

Method for evaluating the state of charge of a battery including at least one phase of estimating the state of charge of the battery by an estimation algorithm and at least one phase of resetting the estimation algorithm implemented during the estimation phase, which includes (i) detecting a real value of a state of charge of the battery at an instant, by (a) charging or discharging the battery, between first and second levels of state of charge; (b) measuring the voltage across the terminals of the battery during this charging or discharging; (c) evaluating the time derivative of the voltage; (d) detecting at least one particular point of this derivative corresponding to a known and predefined real value of state of charge, and (ii) resetting the estimation algorithm knowing the real value of state of charge at the given instant.

主权项

1. Method for evaluating the state of charge of a battery comprising:
at least one phase of estimating the state of charge of the battery by an estimation algorithm for estimating the state of charge, and at least one phase of resetting the estimation algorithm implemented during the estimation phase, wherein the resetting phase comprises:
detecting a real value of the state of charge of the battery at an instant given by:
charging or discharging the battery, between first and second levels of the state of charge;measuring the voltage across terminals of the battery during the charging or discharging;evaluating a time derivative of the voltage; anddetecting at least one particular point of the time derivative corresponding to a known and predefined real value of the state of charge, andresetting the estimation algorithm knowing the real value of state of charge at the given instant.