I've got 16 lishen cells hopefully arriving next week (they arrived in the states last Friday). I'm working to get everything ready for charging and testing.
I think I'm all set on charging.
I was planning to to use my inverter with a load to run the capacity test and capture statistics with my victron smart shunt.
I did a quick test last night and it looks like the smart shunt loses it's history when the power is cut. So, I can watch the ah's tick away during the test, but as soon as my the bms cuts out during a capacity test, it looks like there is no way to see where it finished.
So, does anyone know if there is a way to use the victron smart shunt for a capacity test and see the final ah's consumed? I don't think so since the only negative connection is the actual load. I was thinking maybe I could connect a power supply to maintain a small current so it would keep the shunt running even after the BMS cut out. That could slightly skew the test and I'm not sure how that would work when the BMS cuts out and my inverter is still trying to pull a bunch of amps.
My backup plan - try to catch the pack before it gets too low and record the Ah's and then switch to a small capacity tester to finish the test (I've got one of those cheap fan-based testers). Then, I could just add the values together to get total capacity. I think that plan will work, but there is a risk I miss the cutover and lose my data and have to start over again.
The other alternative is to just test the battery using the fan-based tester, but that's going to take forever and I'm afraid I'll kill the tester unless I run it really conservative. If I run it at 100 watts, I think I'm looking at ~35 hours to test each battery. The only reason I got the fan tester is to capacity test single cells if needed.
I think I'm all set on charging.
I was planning to to use my inverter with a load to run the capacity test and capture statistics with my victron smart shunt.
I did a quick test last night and it looks like the smart shunt loses it's history when the power is cut. So, I can watch the ah's tick away during the test, but as soon as my the bms cuts out during a capacity test, it looks like there is no way to see where it finished.
So, does anyone know if there is a way to use the victron smart shunt for a capacity test and see the final ah's consumed? I don't think so since the only negative connection is the actual load. I was thinking maybe I could connect a power supply to maintain a small current so it would keep the shunt running even after the BMS cut out. That could slightly skew the test and I'm not sure how that would work when the BMS cuts out and my inverter is still trying to pull a bunch of amps.
My backup plan - try to catch the pack before it gets too low and record the Ah's and then switch to a small capacity tester to finish the test (I've got one of those cheap fan-based testers). Then, I could just add the values together to get total capacity. I think that plan will work, but there is a risk I miss the cutover and lose my data and have to start over again.
The other alternative is to just test the battery using the fan-based tester, but that's going to take forever and I'm afraid I'll kill the tester unless I run it really conservative. If I run it at 100 watts, I think I'm looking at ~35 hours to test each battery. The only reason I got the fan tester is to capacity test single cells if needed.