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I agree! A pack should be balanced periodically. Monthly is a good rule of thumb. And since the balancing can't always complete because the highest cell often triggers the end of charging. I think it is a very good practice to do the 100% balance charges in consecutive pairs. Charge to 100% twice (back to back) once a month.The cells which need pulled up during balancing are the lowest before charging and are getting the most stress when cycling because of this. So without balancing they degrade faster than others. Now, it can be argued that the difference is usually incremental and therefore the stress on those cells is only slightly worse. True perhaps, but it's that way on every cycle, many, many cycles and it adds up. If one thinks of it in the terms, that the lowest cells are already less efficient at cycling. And, then they are subjected to a lower discharge on every cycle (without balancing) it seems like the adding insult to injury.Plus with the "i" the cells are at different temperatures most all of the time, which significantly compounds the tendency towards imbalance. Tesla really got this right with their battery temperature management system being active and fluid based. Aerowhatt
I agree! A pack should be balanced periodically. Monthly is a good rule of thumb. And since the balancing can't always complete because the highest cell often triggers the end of charging. I think it is a very good practice to do the 100% balance charges in consecutive pairs. Charge to 100% twice (back to back) once a month.
The cells which need pulled up during balancing are the lowest before charging and are getting the most stress when cycling because of this. So without balancing they degrade faster than others. Now, it can be argued that the difference is usually incremental and therefore the stress on those cells is only slightly worse. True perhaps, but it's that way on every cycle, many, many cycles and it adds up. If one thinks of it in the terms, that the lowest cells are already less efficient at cycling. And, then they are subjected to a lower discharge on every cycle (without balancing) it seems like the adding insult to injury.
Plus with the "i" the cells are at different temperatures most all of the time, which significantly compounds the tendency towards imbalance. Tesla really got this right with their battery temperature management system being active and fluid based.
Aerowhatt
