Datatek
Well-Known Member
- Posts
- 45,133
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- Near Poitiers SW France
Not only are electric cars impractical, but the batteries have relative short lives before the already limited range starts to fall. The batteries are currently difficult or impossible to recycle, mining Lithium and Cobalt is a dirty, energy consuming polluting business. There is not enough power station capacity to support all electric cars, last winter the UK was so close to the limit that electricity had to be imported from France. Generating electricity is inefficient, much is produced using external combustion, there are also losses in the distribution system, transformer losses stepping up the generation voltage to ultra high tension, more losses transforming it down to medium voltage and down again to 440v for local distribution, line losses are typically 6% but can be much more in humid conditions. Then for electric cars there are the losses involved in voltage conversion to DC for charging the batteries and reconverting to AC to drive the motors. I would add that in an all electric car you are effectively sat in a Faraday cage surrounded by strong magnetic fields which could certainly be harmful in the long term.Electric cars simply aren't practical for the vast majority of users as there is simply no way to fill them with 400 miles of "fuel" quickly as there is with ice vehicles.
On 3phase 400 volts, you'd be running at around 3000 amps for an hour to fill a 200kw battery. The cable would be simply too big and expensive. If you up the voltage then you need seriously thick insulation and there are much bigger safety issues.
What we really need is for manufacturers to start making plug in hybrids that can do 80-100 miles on pure electric but drive on the ice alone for longer journeys.
Then we need to link the charging network to clean energy only and have charging points at least 50% of public parking spaces.