Nightguest
New Member
I'm a little stumped here, so I'm wondering if anyone has any advice for me.
I've got 2 batteries, an SOK 48/100 and a DIY 280Ah one, and until now they've been totally fine.
However, recently I've been getting a "high cell voltage" alarm in my CerboGX, and I've noticed that in both my SOK battery and my DIY battery, 1 cell seems to go "all over the place.
What I noticed today:
In my SOK battery, it seems that cell 16 does something similar, but to a lesser extent than in my DIY battery (it will go from 3.25 to 3.6V, then down again).
So, I'm wondering if this is a case of a defective cell that needs replacing, no big deal if yes, just slightly annoying. But, more importantly, if yes, is this potentially dangerous?
Or, is this something else that I'm missing entirely?
I've got 2 batteries, an SOK 48/100 and a DIY 280Ah one, and until now they've been totally fine.
However, recently I've been getting a "high cell voltage" alarm in my CerboGX, and I've noticed that in both my SOK battery and my DIY battery, 1 cell seems to go "all over the place.
What I noticed today:
- I've got about 1400W going into the battery.
- According to both the CerboGX and the BMS screen, cell 4 jumps between 3.24V, 3.30V. 3.42V, 3.65V, 3.9V (slightly alarmingly), then drop back down to 3.245V, then back up.
- However, when I discharge the battery pack, that cell seems to behave exactly like all the others. For example, I've got my regular loads, then turn the washing machine on, comes up to about 2400W being pulled, and all the cells behave the same, with no cell going out of balance or
- The BMS does "try" to manage this, I notice that every time the voltage spikes, the entire module/battery pack is taken offline (again, shows in CerboGX, 1 module online, 1 offline), and then when the voltage is below 3.6V (about 1s later) the module turns back online. (I can hear the BMS clicking on/off/on/off when this state triggers).
In my SOK battery, it seems that cell 16 does something similar, but to a lesser extent than in my DIY battery (it will go from 3.25 to 3.6V, then down again).
So, I'm wondering if this is a case of a defective cell that needs replacing, no big deal if yes, just slightly annoying. But, more importantly, if yes, is this potentially dangerous?
Or, is this something else that I'm missing entirely?