Maast
Compulsive Tinkerer
I think I'm going to need a LOT more balancing amperage: When I'm done each of the cell groups of my 48v BYD bank is going to have 1125AH per cell group. I've got a string of QNBBMs that can do 5-6A but the highest I've seen in actual use is 1.4A with a .25v differential.
Even with all the tinkering and adding capacity to the weak cells these BYDs are always going to be badly mismatched and I can easily see a cell group getting out of balance and the QNBBMs not being able to keep up - especially in the winter where extremely deep discharges followed by extended high amperage charging is likely.
I'm thinking if I parallel 3 of these I can avoid a premature bank shutdown but I have no idea how well the balancers will play with one another. The ones I'm looking at is the https://heltec-bms.com/product/5a-capacitive-active-equalization-active-balancer/ .
At only $50 per balancer its by far the most cost effective solution I've found so far.
Thoughts?
Even with all the tinkering and adding capacity to the weak cells these BYDs are always going to be badly mismatched and I can easily see a cell group getting out of balance and the QNBBMs not being able to keep up - especially in the winter where extremely deep discharges followed by extended high amperage charging is likely.
I'm thinking if I parallel 3 of these I can avoid a premature bank shutdown but I have no idea how well the balancers will play with one another. The ones I'm looking at is the https://heltec-bms.com/product/5a-capacitive-active-equalization-active-balancer/ .
At only $50 per balancer its by far the most cost effective solution I've found so far.
Thoughts?
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