Something overlooked is your BMS, ability to handle that higher charge current.
Any out of balance cells will quickly become more of a problem. Highest cells will rise faster and with the BMS, inability to drain them down quick enough the cells may overcharge and then the overall voltage taken into account the BMS, then stop the charge. BMS, could also overheat.
Some cells will read 4.25v possible higher and other cells could be far from 4.2v. Result is a far shorter ride. The problem becomes worse and worse, lowest cells become lower voltage and therefore less and less distance.
Also, the higher charge current on a well balanced battery pack is only applicable to about 70-80% of the maximum battery capacity. That is to say that final 1-2 volts can take another 2 or more hours. Far longer if require the battery to balance.
In short, should only utilise a high current charger if your balancing circuitry can handle the extra current. And idea should deploy voltage monitoring on all cells within a pack. And install a smart BMS, then custom the balancing voltage, view cell data, bluetooth, etc.
And yes, lower currents, are better.
I charge via 2 and 8.14amp charger 10s 13p. I’ve an external active balancer capable of 3+amps per cell. I find a 2amp charge far superior. However, some of my journeys are 100-200km with multiple charges and 8.14amp to maximum 4.05v per individual cell is essential.
My goal is to build a 400 cell battery within a Vector Typhoon frame. Over 4kwh. Should negate those present cafe stops.
