Batrium.... One cell

[Jbbonnette]

I just expanded my system with another 16s bank. I have one cell, #43 of 48 that will jump up or down radically.

The entire collection of banks is working well. I have had any problems yet, but this does worry me.

Is this a blemished terminal thing? Or a greater problem?

Thanks.

 

[BentleyJ]

Bad wire or wire insulation damage, ring terminal, battery post, connector on the BMS, bad solder joint on the BMS PCB? I doubt if the cell voltage can actually change "radically" up and down as you described. Its some kind of connection problem with that cell voltage monitoring circuit.

 

[toms]

Are you using cellmons? The wiring to these is easily damaged, try a different harness if you can’t see anything obvious.

 

[Jbbonnette]

Batrium K9.

I replaced the bus bar, the ring terminal, the fuse, the wire, and the ferrule. Same problem. In fact, it is getting worse. It deviates so high I am going critical. I changed much of my critical thresholds to account, but that reduces the level of safety for the system.

I just began to have anther problem with this same bank. #16 of this battery (#48 of the whole collective bank) keeps falling off all together. This morning, it was registering 0.00 through the bms. The entire "bar" was missing from the Batrium Chart. I began to look at logs from days previous, this is happening dozens a times a day for the last few days.

I'm starting to have doubts about this K9 unit. My last means to check the one cell is to swap it out with another. I have no idea about these routine 0.00v readings suddenly on the other. This is very furstating.