Electrical energy storage system with integrated fault warning system

An electrical energy storage system comprising:

• a plurality of electrical energy storage packs each including at least one electrical energy storage cell, each of the electrical energy storage packs comprising a switch that controls a connection between two ports of the respective electrical energy storage pack,
• an electrical wire loop forming a closed circuit by connecting the plurality of electrical energy storage packs in series at two of their ports,
• a first one of the plurality of electrical energy storage packs is configured to supply the electrical wire loop with an electric current, and
• an alarm device electrically connected to the electrical wire loop to receive the electric current that passes through all electrical energy storage packs of the electrical energy storage system, wherein,
• the alarm device is configured to provide an alarm output when the closed circuit is broken.