Modular rfid reader for fuel dispensing nozzle

A modular RFID reader of a fuel management system configured to be attached to a fuel dispensing nozzle, the modular RFID reader comprising:

• multiple battery modules;
• a main module;
• and
• a connecting means configured to releasably connect one of the multiple battery modules with the main module;
• wherein each battery module comprises:
• a first antenna configured to send and receive signals to an RFID tag:
• a battery control circuitry electrically connected to the first antenna;
• a battery cell electrically connected to the battery control circuitry;
• a first electrical connector which is connected to the battery control circuitry and is connectable to a second electrical connector on the main module when the battery module is connected to the main module;
• and
• a battery case accommodating the battery control circuitry, the battery cell and the first electrical connector;
• wherein the main module comprises:
• a second antenna configured to send and receive signals to a controller of the fuel management system;
• a main control circuitry electrically connected to the second antenna;
• the second electrical connector, which is connected to the main control circuitry;
• and
• a main case accommodating the second antenna, the main control circuitry and the second electrical connector;
• and
• wherein each of the multiple battery modules is individually connectable to the main module to form an RFID reader