archi 2018

My future of electric charging | Rik de Doncker

To charge three batteries, 200 kWh is enough

Electric vehicles don’t need high-powered batteries. They are heavy, expensive and last longer than the vehicle itself. Moreover, there is no need to drive 800 kilometres without a break; you have to take a break every two hours anyway and you can charge the battery then.
A better solution would be for vehicles to be fitted with two or three batteries. Each would support a specific use of the vehicle through converters and inverters.

Another advantage of three different batteries is that the weight is half that of one big battery. Lighter batteries are also more financially viable, because capacity is not lost as a result of the longer vehicle service life. The customer’s requirements and the type of vehicle also determine which batteries are required, as does the price. Small batteries are cheaper, which reduces this component of the overall price of an electric vehicle.

Do we still need 300 kWh charging stations in that case? With three smaller batteries, 200 kWh would appear to be sufficient to charge the vehicle quickly. Charging would then take less than fifteen minutes, which is acceptable to users, as has been demonstrated in research by the RHWT in Aachen.