Emergence of Electric Vehicles EVs
Ten years ago, many doubted if EVs are every going to replace gasoline powered vehicles. Electric battery and charging were the prominent concerns. EV batteries were expected to take long time to charge and run out fast within few miles of travel. Size of battery was also a concern as the length of travel was proportional to battery capacity. Notwithstanding that EVs were initially deemed a failure, last few years have been turn of the tide for the EVs. Over 2M EVs are sold out. Governments have made necessary arrangements for installing charging points not to mention benefits and grants to help businesses choose EVs over gasoline. Some governments are banning further purchases of gasoline vehicles. It is highly likely that within the next decade, gasoline powered vehicles would be nearly diminished.
Why Electric Vehicles
The main reason for automotive innovation from gasoline to EV is being environmentally-friendly and sustainable. Accordingly, preventing the contribution of greenhouse gas emission into environment and reducing global warming. In addition, EVs today are low maintenance. Electricity is cheap and with modern EVs being powered with up to four motors to drive power transmission, EVs are on the par with gasoline versions in terms of horsepower, payload capacity, mph and acceleration.
Some useful values are kwh of rechargeable battery, charging time and range. Generally, at the time of writing, 1kwh will charge approximately within 1 minute.
1 kwh = 1 min
1 kwh = 4 miles ( roughly, for a four seat car), so a 60kwh is likely to deliver close to 250 miles and charge to 90% of its capacity within 1 hr.
1 kwh = 25p ( roughly), so a 60kwh lithium ion battery powered car could be easily fully charged in less than £15.
Ioteach and EV innovation
Ioteach continues to provide engineering education and consultation. From innovation perspective, it is worth noting that EVs are merely substituting the four-stroke engines to drive the powertrain transmission.
The core architecture is still the same, notably with EV versions that consists of a single motor. The output of motor couples with powertrain transmission and gearing to drive the four wheels. However, EVs with four motors are more advanced with each wheel running by a separate motor and all four motors operating in real-time synchronisation. The control system that drives four axis synchronously is rather sophisticated. However such technology is nothing new, being successfully implemented for decades within manufacturing industries and industrial process control systems.