Method for pulsed charging of a battery in an autonomous system comprising a supercapacitance

A method for charging a battery of an autonomous system by means of an intermittent power source delivering a direct current, the method comprising at least one phase of charging at pulsed current managed by a charging control circuit, the control circuit successively performs:

• measuring, during a current pulse, an amplitude of a current pulse and an amplitude of a voltage increase at terminals of the battery during said pulse,
• determining a dynamic internal resistance of the battery from said amplitudes,
• determining a maximum current threshold acceptable by the battery according to a predefined maximum voltage threshold, to said dynamic internal resistance and to a no-load voltage at the battery terminals,
• limiting a value of the battery charging current, at next current pulse, to a value lower than said maximum current threshold by controlling a closing time of a second electronic switch.
• a method wherein a supercapacitance being connected in parallel with the battery via a first electronic switch and in parallel with the power source via at least the second electronic switch.