            IÑAKI GRAU UNDA 1 , PANAGIOTIS PAPADOPOULOS, SPYROS SKARVELISKAZAKOS 2 , LIANA CIPCIGAN 1 , NICK JENKINS 1 1 School of Engineering, 2 School of Engineering 1 Cardiff University, 2 University of Greenwich 1 Queen's Buildings, the Parade, Cardiff, CF24 3AA, Wales, UK UNITED KINGDOM graui@cardiff.ac.uk  A high Electric Vehicle (EV) uptake is anticipated in the forthcoming years. Some concerns of vehicle users in switching from conventional internal combustion engine vehicles to Electric Vehicles, relate to distance range anxiety and the time required to recharge the EV batteries. The battery swapping station concept, which consists of replacing depleted batteries for fully charged batteries (in minutes), may incentivise EV adoption by having a similar role to that of petrol stations. In this paper the operation of an EV battery Swapping Station Manager (SSM) is analysed. A methodology is presented to calculate the number of chargers and batteries required to satisfy daily battery demand. The effects of the number of batteries and chargers on the swapping station’s electricity load profile are shown.  Electric Vehicle, Battery Swapping Station, Electric Vehicle Battery Charging.   EV battery charging infrastructures are required to charge Electric Vehicles. The charging infrastructure considered in this paper is the battery swapping station. Battery swapping stations replace depleted batteries for fully charged batteries. Swapping stations are currently being developed and their operation is being tested in field trials [1], [2]. In this paper the operation of an EV battery Swapping Station Manager (SSM) is proposed with the policy of charging the depleted batteries as soon as possible. The operation of a software tool that calculates the batteries and chargers required to satisfy battery daily demand in a swapping station, is analysed.     The Swapping Station Manager (SSM) software manages the charging of the batteries in a battery swapping station, with the aim of providing fully charged batteries to the EVs in exchange for their depleted batteries. The management of the EV battery charging is dependent on:  The number of chargers installed in the swapping station.  The number of batteries in the swapping station. This number remains constant since for every fully charged battery delivered, a depleted battery is acquired. The batteries in a swapping station can be in three different states: i) Charging: The battery is connected to a charger. ii) Fully charged: The battery has finished its charging process and it is available to be swapped. iii)Depleted: The battery provided by the EV remains in this state until it is placed in a charger. In this research, batteries in this state are referred to as being in the Depleted Battery Queue (DBQ). The swapping station charging policy is to charge the depleted batteries as soon as possible, ensuring the maximum number of charged batteries at every time interval. The process followed by the SSM when an EV arrives at the swapping station is shown in Fig.1. Fig.1 SSM process at an EV’s arrival Remove depleted battery Charger available Allocate battery in a charger Allocate battery in the DBQ Yes No EV’s arrival at the swapping station Latest Trends in Sustainable and Green Development ISBN: 978-1-61804-132-6 119