1. Charging time related expand
and now electric vehicles generally use lithium iron phosphate battery, this battery principle of our phone battery is the same. Charging time division fast charge and slow charge.
In general household car, for example, fast-charge, then the percentage may be filled with 70-80 within half an hour, but the maximum charging current, battery damage, if it is possible to slow charging full 7-8 hours . And although there are many known auto companies can charge on 220V electricity, but this is only theoretical, because so much like a battery connected to an ultra-high-power appliances, one cell may have tripped while charging.
for the battery of this bottleneck now, many people have put forward the concept of quick-change battery, you said two for the use. But that is not done by human power, battery on a person with a car is not moving at all, and when the Beijing Olympic Games is a robot with handling, finished in a special charging station where about 34 minutes to change well a bus batteries.