Battery system comprising means for synchronizing voltage and regulating current with a power supply network

A battery system with electrochemical cells, intended to recharge/discharge on an extended power supply network operating with alternating voltage, the system comprising at least one current line comprising a plurality of elementary modules, each provided with a cell or a cluster of cells, forming a distributed multilevel inverter and a control unit for the elementary modules capable of generating a selected alternating voltage waveform at the terminals of the current line based on a voltage reference setpoint, wherein the system further comprises:

• means for determining electrical characteristics of an alternating voltage waveform from the power supply network,
• means for synchronizing the electrical characteristics of an alternating voltage waveform of the current line of the battery system with the alternating voltage waveform of the power supply network,
• an electrical connection means for connecting the current line to the power supply network, controlled based on a synchronization state of the voltage waveforms of the battery system and the network,
• means for regulating the battery system current by controlling the voltage reference setpoint of the battery system current line.