Abstract: The method and system for fixing a battery pack to a receptacle, the battery pack including a housing, with at least one fixing device for the housing to the receptacle, and including a rotating shaft with an alignment shape that can cooperate with a complementary shape on the receptacle, and a cavity for accepting a tool for rotational drive. A cam is driven in rotation by the shaft and includes an extension that can be introduced or removed to or from a housing in the receptacle. The receptacle is provided with a complementary shape and housing opposite each fixing device. A method for automated assembly/disassembly of a battery pack includes such a fixing system.