I've noticed that when charging/discharging my eve cells (24 304Ahs in 3p8s), some of my cell blocks have much higher voltage fluctuations according to the bms. It seems to be the furthest blocks from the BMS that have this issue. For example, I see fluctuations of 3.23V to 3.251V in the 8th block while discharging and fluctuations of 3.360V to 3.386V while charging (both over the course of a few seconds). Both of these were at ~50 amps. My multimeter doesn't show these fluctuatoins. Is this normal?
A few things to note:
I did extend some of the balance leads
The 6th cell block is connected to the 7th with 4/0 cable instead of bus bars (as the 7th and 8th block had to be in a different location)
The cells are not yet top balanced
I checked and tightened all my bus bar connections, tried multiple different charging sources (the problem lessens dramatically at lower charging amperage), and tried multiple cables connecting the 1-6s to 7-8s.
Any idea what is causing this? Is it a problem?
A few things to note:
I did extend some of the balance leads
The 6th cell block is connected to the 7th with 4/0 cable instead of bus bars (as the 7th and 8th block had to be in a different location)
The cells are not yet top balanced
I checked and tightened all my bus bar connections, tried multiple different charging sources (the problem lessens dramatically at lower charging amperage), and tried multiple cables connecting the 1-6s to 7-8s.
Any idea what is causing this? Is it a problem?
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