If you think an e-bike battery is expensive at £500 then just think what a car battery would cost.
It's all a question of energy density and the poor old battery can't hold a candle to fossil fuel (erm, not that it should, that wouldn't be a good idea at all
)
I forget the figures now but they did say what the energy density of petrol was per kg compared to any other source of power. It was astronomical.
Petrol has approximately 12.9 kWh/kg in comparison to batteries. I suppose my 14Ah battery weighs about 2kg without the case etc., so that would be 7Wh/kg. Batteries for cars have got a very long way to go. Mind you, if weight could be reduced
On the other hand, several thousand pounds every couple of years or so doesn't bear thinking about, how many of us have let out a sharp ouch! when it came time to replace our batteries (a 'pleasure' I have yet to experience).
I would love a cheap, reliable electric car but I've nowhere to charge it and the running costs (batteries) would leave me - well - running! I think the e-bike does well to squeeze out the mileages that they do.
Thinking that my old Powabyke with 36V, 14Ah SLA managed a meagre 18-20 miles and my Lithium powered Wisper easily manages in excess of 30 miles is no small achievement. In fact, my SLA batts were dead in less than a year. My lithium battery at 18 months old is still exceeding 30 miles.
It seems that e-bikes are where the technology is moving along at a good pace as motors and batteries become more efficient.
The next major change would come with even higher energy density batteries. I wonder what that would be?
Best regards.
Vikki.