chadjones99
chadjones LLC
Hello, So I'll try and make this short as I can. I bought a cloud energy 300 AH battery and tested it from 100 SOC charged down to 4% SOC which was 10.5 volt cut off on my inverter using a Victron shunt to measure power out. I pulled 283 AH out. leaving me 17 AH short now I might have gotten 290 ish if I ran it down on my DC loads to the 10-volt BMS cut-off but did not want to .
So I figured a brand new battery should have pulled the full 300 Ah. So today I opened up the battery ( metal case hand lid that was screwed on so easy to do ) and I was expecting 4 cells , but found it has 8. I'm guess 8 x 150 AH cells ? funny the BMS balance leads only had 4 , connected to long sections of bus bar ( multiple cells per lead ) instead of a 8S balancers. So I checked each cell and this is what I found the voltage to be (the battery is at 90% SOC during this )
3.35 , 3.35 , 3.36 ,3.36,3.35,3.35,3.36,3.36 I take it that is pretty well balanced. I figured maybe it was out of balance causing the lower AH reading. so I took picture of the QR code on the cells but none of the websites I found can identify them
the QR code is : 00P-CB-A6N01-L02HB-CP000-1122
can anyone tell me about these other than it looks to me like they were made: Production Date:23/Dec/2021
I'm looking to cell if they are used cells or grade B or what manufacture. or capacity, I'm guess 150 AH if the total pack is sold as a 300 AH battery
Also looking to find out can I piggie back on the balance leads and put an active balancer on it. i see that there is no threaded holes as the bus bars are welded on and not bolted
see attached pictures
So I figured a brand new battery should have pulled the full 300 Ah. So today I opened up the battery ( metal case hand lid that was screwed on so easy to do ) and I was expecting 4 cells , but found it has 8. I'm guess 8 x 150 AH cells ? funny the BMS balance leads only had 4 , connected to long sections of bus bar ( multiple cells per lead ) instead of a 8S balancers. So I checked each cell and this is what I found the voltage to be (the battery is at 90% SOC during this )
3.35 , 3.35 , 3.36 ,3.36,3.35,3.35,3.36,3.36 I take it that is pretty well balanced. I figured maybe it was out of balance causing the lower AH reading. so I took picture of the QR code on the cells but none of the websites I found can identify them
the QR code is : 00P-CB-A6N01-L02HB-CP000-1122
can anyone tell me about these other than it looks to me like they were made: Production Date:23/Dec/2021
I'm looking to cell if they are used cells or grade B or what manufacture. or capacity, I'm guess 150 AH if the total pack is sold as a 300 AH battery
Also looking to find out can I piggie back on the balance leads and put an active balancer on it. i see that there is no threaded holes as the bus bars are welded on and not bolted
see attached pictures