ttobiassen
100 mW
So, I have the following strange problem...
I have 7 Leaf battery modules, ie, 14S, that I have wired and working properly with a 14S BMS (discharging at 0.5C continuous, 1.5C peak and charging at 0.1C). This was for project A, now I was hoping to use it for project B. For project B, I want to use 13S. However, I don't own a smart charger that is capable of charging higher than 6S, as I've been using a bulk charger and the 14S BMS to charge and discharge safely.
What would the behavior of the pack be like if I tapped a discharge lead at the 13S location for discharging only but still tried to charge the pack using the 14S BMS?
The last cell (number 14) would always stay roughly charged, so I imagine the resulting behavior of this strategy would be: safe discharge, safe but LONG (days) balance charge. The only thing I can think of to help a bit would be to put a small load across the 14th cell (really bright light bulb?) so that when it comes time to charge the 14th cell will at least spend SOME time getting back up to full voltage, allowing the others to catch up.
Am I looking at this correctly? Just trying to keep this pack together without having to take it apart and rewire a new 13S BMS (also, I'm supposed to have a solution by the end of the week, so...).
I have 7 Leaf battery modules, ie, 14S, that I have wired and working properly with a 14S BMS (discharging at 0.5C continuous, 1.5C peak and charging at 0.1C). This was for project A, now I was hoping to use it for project B. For project B, I want to use 13S. However, I don't own a smart charger that is capable of charging higher than 6S, as I've been using a bulk charger and the 14S BMS to charge and discharge safely.
What would the behavior of the pack be like if I tapped a discharge lead at the 13S location for discharging only but still tried to charge the pack using the 14S BMS?
The last cell (number 14) would always stay roughly charged, so I imagine the resulting behavior of this strategy would be: safe discharge, safe but LONG (days) balance charge. The only thing I can think of to help a bit would be to put a small load across the 14th cell (really bright light bulb?) so that when it comes time to charge the 14th cell will at least spend SOME time getting back up to full voltage, allowing the others to catch up.
Am I looking at this correctly? Just trying to keep this pack together without having to take it apart and rewire a new 13S BMS (also, I'm supposed to have a solution by the end of the week, so...).