Connecting EV's

There are a number of ways an electric vehicle can be connected to the grid. The first is through a hard wired link such as an extension cable. Standard wall sockets do not carry the current required to charge an electric vehicle quickly, so 3-phase plugs, or high current charge points must be used. Charge points are already being introduced in Australia in an attempt to connect Hybrids and EV's to the grid, however, there are sure to be competing standards and methods of connection.

The important thing is that recharge points are set up to take full advantage of Australia's rich source of sustainable energy and smooth out demand spikes. It is also important that safety is a key concern, as we are dealing with potentially lethal voltages and currents. Furthermore, the issue of security, theft and vandalism is important to consider when designing a public vehicle to grid interface.


Other ways of connecting to the grid

Another way of transferring electricity between vehicle and grid is through ultra high frequency induction coils. This has been trialed in at least one simulation and it was found that through the implementation of induction coils in the roads at key traffic build up points, energy could be transferred to the vehicle. This allowed the necessary battery size of the electric vehicle to become as little as 30% of the size as it was being charged through coils in the roads. This could mark an important advance for electric vehicle design as the battery is currently the most expensive part of an electric vehicle conversion.