The adoption of electric vehicles (EVs) is gaining pace worldwide, bringing the charging infrastructure into focus. Countries and municipalities are seeing the benefits of powering public transportation fleets with electricity since its infrastructure needs have become more feasible, achievable and affordable.
To date, charging points for EVs have been plug-in solutions, which work but are not very convenient. The next and final step in the evolution of EV charging is wireless charging: there is a worldwide accepted standard, and it is perceived as an enabling technology for autonomous driving.
THE SMALLER THE BATTERY...
Electrified public transportation such as electric BRT bus routes are currently only feasible with charging on route or many spare buses to allow recharging at end of route. Since the battery on electric buses represent up to 50% of the cost of the bus and its weight is inversely proportional to its passengers’ capacity, a reduction of battery capacity is desirable. However, as battery capacity is reduced, so is the charging power that the battery can safely use.
Dynamic wireless charging presents a futuristic but all-possible vision. With a 70% reduction on battery needs and energy transfer through coils embedded in magnetizable concrete roads, batteries will be charged with a round-the-clock energy flow.
This presents long term benefits not just to the environment, but also represents additional opportunities through emerging battery technology that can be transferred to other energy applications beyond moving people around in urban areas, such as the reutilization of batteries for a second life as part of a battery storage system.