Circuit for charging an electric battery by means of a photovoltaic module

A circuit (205) for charging an electric battery (101) by means of a photovoltaic module (103), comprising:

• first (I+) and second (I−) input terminals intended to be respectively coupled to fist (M+) and second (M−) terminals of the photovoltaic module;
• first (O+) and second (O−) output terminals intended to be respectively coupled to first (B+) and second (B−) terminals of the battery;
• a switched-mode power converter (107) comprising first (ci+) and second (ci−) input terminals respectively coupled to the first (I+) and second (I−) input terminals of the charging circuit and first (co+) and second (co−) output terminals respectively coupled to the first (O+) and second (O−) output terminals of the charging circuit;
• a circuit (109) for controlling the switched-mode power converter (107) comprising first (s+) and second (s−) power supply terminals respectively coupled to the first (O+) and second (O−) output terminals of the charging circuit;
• a protection switch (K2) coupling the first output terminal (co+) of the switched-mode power converter to the first output terminal (O+) of the charging circuit;
• and
• an overvoltage detection circuit (207) configured to, when the voltage between the first (O+) and second (O−) output terminals of the charging circuit exceeds a threshold, send an order to turn off the protection switch (K2) and stop the switched-mode power converter (107) for a predetermined inhibition period.