There are a lot of articles written about quick charging of batteries. However the word “quick” makes the reader think it is very fast while it in the reality means half or a full hour or even more if it is a big battery. Further, partially educated by the media, the general public reads that the future developments will bring the charging time to zero, which will not happen due to the law of nature. As an example to charge 90 000 Watt hours (90 kWh), one need high voltage and high currents. Suppose that you would try to charge three Teslas with 90 kWh batteries in the same time it takes to fill up a petrol car (3 minutes), then you need three phases, 400 Volts and 7300 Amps! Compare this to the 16 amps which are the common current delivered to residents. In a future large scale scenario where you may have 10 cars charging at a charge station one can see that the challenges are extreme.
Original Youtube video here: Where To Find How To Charge A Car Battery