Modelling range extension of electric vehicles using dynamic wireless power transfer

The limited range of electric vehicles (EVs) is frequently quoted as one of the main impediments to their widespread adoption. One promising technological solution to this is Dynamic Wireless Power Transfer (DWPT) whereby coils within the road surface transfer energy to moving vehicles (providing motive power or charging on-board batteries). This paper reviews what has been suggested as an acceptable range for an EV and then uses published data on DWPT performance to develop a model for estimating how much of a road network needs to be equipped with DWPT technology to satisfy specific range requirements. In one typical “long journey” scenario, approximately 66% of the network would need to be equipped. Other scenarios are presented and sensitivity analysis of the model’s key parameters is explored. Finally, a series of recommendations are made for optimising DWPT provision

Potential of wireless power transfer for dynamic charging of electric vehicles

Wireless Power Transfer (WPT) offers a viable means of charging Electric Vehicles (EV)’s whilst in a dynamic state (DWPT), mitigating issues concerning vehicle range, the size of on-board energy storage and the network distribution of static based charging systems. Such Charge While Driving (CWD) technology has the capability to accelerate EV market penetration through increasing user convenience, reducing EV costs and increasing driving range indefinitely, dependent upon sufficient charging infrastructure. This paper reviews current traction battery technologies, conductive and inductive charging processes, influential parameters specific to the dynamic charging state as well as highlighting notable work undertaken within the field of WPT charging systems. DWPT system requirements, specific to the driver, vehicle and infrastructure interaction environment are summarised and international standards highlighted in order to acknowledge the work that must be done within this area. It is important to recognise that the gap is not currently technological; instead, it is an implementation issue. Without the necessary standardisation, system architectures cannot be developed and implemented without fear of interoperability issues between countries or indeed systems. For successful deployment, the technologies impact should be maximised with the minimum quantity of infrastructure and technology use, deployment scenarios and locations are discussed that have the potential to bring this to fruition

Code of practice for electrical energy storage systems

The purpose of this Code of Practice is to provide a reference to practitioners on the safe, effective and competent application of electrical energy storage systems. It also provides an understanding of the common terms and operating modes of electrical energy storage systems. Building on the IET’s technical briefing: Electrical Energy Storage: an Introduction this will also provide detailed information on the specification, design, installation, commissioning, operation and maintenance of an energy storage system. The scope covers all types of electrical and electrochemical energy storage systems; integration into low voltage power systems; industrial, commercial and domestic applications and systems aligned with existing standards, regulations and guidance