Smart Mobility: Electronics technology applied to smart mobility with low impact to the environment, Part 2 contains the description of the possible usage of electric energy to recharge an electric bus by means of a charging station. A new step in this direction is the fast charging setup made by the ABB Company for electric bus transportation in Switzerland (see Figure 1):
“ABB will deliver and deploy 13 flash-charging stations that take less than 1 second to connect the bus to the charging point. The onboard batteries can then be charged in 15 seconds with a 600-kilowatt boost of power at the bus stop. A further 4 to 5 minute charge at the terminus at the end of the line enables a full recharge of the batteries. The technology was developed by ABB engineers in Switzerland.” (Source: EETimes Europe)
The new solution for electric bus transportation by the ABB Company (Source: ABB)
Electronics technology plays an important role for this type of solution in realizing the energy transfer integrated system (see Figure 2).
The electronics integrated in the electric bus transportation solution by the ABB Company (Source: youtube)
See the following YouTube video on this subject:
This solution is very eco-friendly for the environment and, at the same time, it guarantees the safety of the passengers of the electric bus:
“The charging stations are placed along the route and the bus’s battery is recharged while passengers are getting on and off the bus. There are two types of chargers along the route:
•Flash-charging stations at selected stops provide a short high-power boost at 600 kilowatt (kW) for 15 to 20 seconds.
•Terminal feeding stations deliver prolonged charges of 4-5 minutes at 400 kW to fully top-up the on-board batteries. The terminal chargers are an IGBT-based rectifier, which convert the incoming AC supply to a DC one, which can be used by the bus”
Electronics technology is very useful in realizing the IGBT-based rectifier; for example, a possible integrated implementation of this solution is described in Figure 3 below:
An IGBT-based circuital solution for automotive application: IGBTs are required as power switches in highly power-intensive DC-DC converter applications that transfer energy in one or either direction between the 12V power system and the high-voltage battery. (Source: electronic design)
In the fourth part of this blog series I will further describe the scenario of possible solutions offered by electronics technology applied to realize smart e-vehicle solutions that perfectly fit the smart e-mobility inside the smart cities, a good example of the effectiveness of the IoT approach.