ELECTRICAL POWER SUPPLY SYSTEM FOR A VEHICLE

An electric power supply system for an electric or hybrid vehicle. The vehicle includes an electric power supply bus able to supply power to electrical equipment installed in the vehicle. The system including: a DC-DC voltage converter; at least two power supply cells, each including: i) a rectifier, ii) a battery, and iii) a switching cell; and a distribution module intended to be connected to a recharging module external to the vehicle. The power supply system is configured to operate in an operating mode in which: the batteries are connected in series by the first set of switches, and the distribution module connects one or more batteries to the external recharging module.