In Smart Mobility: Electronics technology applied to smart mobility with low impact to the environment, Part 3 of this blog series I have introduced the smart solution for electric buses with enables recharging in few seconds at each station; this type of smart mobility is sustainable because it does not create pollution.
The autonomy of the electric vehicle may be further extended by introducing a high efficiency solar cell panel into the body of the vehicle to increase the medium distance that could be covered by the bus; recently solar cells have been combined with batteries to obtain a high conversion efficiency of solar energy:
“The researchers from Case Western Reserve University wired four perovskite solar cells in series to directly photo-charge lithium batteries with 7.8 percent efficiency, which they believe to be the most efficient configuration reported to date.
We found the right match between the solar cell and battery... Others have used polymer solar cells to charge lithium batteries, but not with this efficiency," said Liming Dai, the leader of the research team, adding that the coupling appears to have outperformed all other reported pairings of photo-charging components and compatible batteries or super-capacitors.” (Source: gizmag)
High efficiency solar cells to recharge electric vehicles while moving (Source: gizmag)
The introduction of solar cells used as recharging elements could add the interesting option of a net of e-vehicles connected to the central infrastructure of the smart city that might modify the route of each e-bus depending on necessity by means of a bidirectional wireless communication with the central hub connected with a directional center.
The autonomy of e-vehicles is a key point for this type of solution that is compatible with IOT technology, because the smart vehicles could be powered while moving and could be connected wirelessly to a net of smart vehicles. This can be done via means of integrated GPS modules. The contribution of electronics technology to smart e-vehicle also includes Wi-Fi modules and IP-cameras (see Figure 2):
There are many large companies producing ICs for automotive applications, for example Texas Instruments:
“BMS is a key element in the overall HEV architecture. Not only will an intelligent implementation extend the battery’s lifetime, but it can also extend the possible range of the vehicle in fully electric drive mode, which is a key selling point to end users.” (Source: Texas Instruments Hybrid and Electric Vehicle Solutions Guide)
The integrated system solution for BMS (Battery Management Systems) by Texas Instruments Company for HEV (Hybrid and Electric Vehicles). (Source: Texas Instruments)
In the next part of this blog series I will describe a new solution of autonomous buses for public transportation in a smart city having low environmental impact. What do you think of this type of transportation?