A very ideal idea for best top balance Enginer battery pack every day!

First - is not a good idea to charge to the top and discharge to the end the battery every time. You will have few times shorter life on them. Using 80% of the capacity could extend the life 3 times. Is not important to have perfect balancing every time.
But yes - is good idea for fast charger, very complicated to make it, but if you want to spend time - do it. For 40A you will need thicker cables - 17 pieces, good connectors for 17 cables - calculate the minimum cable gauges to avoid heating.
Basically you can remove the BMS in this case - still need to have some control over discharging.
I know some people does not install BMS at all, charging battery to a little under the maximum - for safety - with regular charger, and balancing manually once a month. That is good for 5-6 cells, for 16 will be harder.

 

all the best, be safe!

 

You will need 17 - 40A cables for the batteries, 220V there is ok any cable

 

I don't think it would be "cool" at all.

Every day you would have to connect 32 leads to the battery pack instead of just one.

Then, just ONE slip up and you could kill the battery AND maybe even yourself.

Nope, not "cool" at all.......in my opinion.

 

If all chargers are small enough, and permanently connected, then only need one cable to be connected - the 220V. Just comment the idea. I will not do it for me.