So is 93.7 my max capacity now?

[Ennis437]

So today my pack #3 showed 100 percent charge but only able to take in 93.7AH I brought it up on PBMS and this is what it showed. Is there anything that can be done to combat this? Or has the battery already lost 6 percent capacity after only 160 charge cycles?

 

[Lt.Dan]

Do a full cycle from HVD to LVD and I bet it will update with the true value.

I also would take these capacity with a grain of salt because the shunts built into the BMS's are not always the most accurate thing.

 

[Brucey]

So today my pack #3 showed 100 percent charge but only able to take in 93.7AH I brought it up on PBMS and this is what it showed. Is there anything that can be done to combat this? Or has the battery already lost 6 percent capacity after only 160 charge cycles?

There's a problem with at least one of the cells being high, the BMS probably stopped taking charge earlier than ideal. But as mentioned soc may be a way out guess especially with very low loads.

 

[Lt.Dan]

There's a problem with at least one of the cells being high, the BMS probably stopped taking charge earlier than ideal. But as mentioned soc may be a way out guess especially with very low loads.

View attachment 217384

True, but based on the other cells being really closed to 3.5v, I would bet they are just a few mA behind cell 5. Nothing to be concerned of. They are all still at 100%

I would consider that a well balanced pack.

 

[Ennis437]

Do a full cycle from HVD to LVD and I bet it will update with the true value.

I also would take these capacity with a grain of salt because the shunts built into the BMS's are not always the most accurate thing.

Well, I did that last night. The BMs actually cut it off reported 0 Ah and it fully charged only to 937. Also, it says the state of health is only 93.7. I’ll isolate the pack and try again and see..