ELECTRIC POWER SUPPLY SYSTEM FOR A VEHICLE

An electric power supply system for an electric or hybrid vehicle, the vehicle including an electric power supply bus, the system including: a) a DC-DC voltage converter; b) at least two power supply cells each including: i) a rectifier, ii) a battery connected to the rectifier, iii) a switching cell including switches capable of connecting the battery to the converter; c) a first set of switches capable of connecting the batteries in series; d) a second set of switches capable of connecting all the batteries connected in series to the power supply bus; e) a control unit configured to control all the switches.