If you swap BMBs does the issue move with the BMB or stay with the connector? It sounds like a connection issue or BMB solder joint issue (quiet common)


It seems to be the BMB. I switched them and it switches the incorrect temp reading. Ok, something related to the BMB like solder joint issue ...

Ok thanks! 8-) I used 6 Packs (making it 14 cells) and attached two BMBs. Everything seems to work fine. I have 14 "modules" with 4 - 3 voltage readings that are all correct.
However, this means that I cannot run the BMBs if the number of cells/packs I want to monitor is not x%7=0? The BMB will ...

I have the Tesla B-Class BMB (7s) with a SIMP BMS and I tried to test them the first time. I checked one BMB connected to three Nissan Leaf Gen 2 Packs (each pack is 2S 2P).

Temp test worked. Voltage somehow worked except for the last two reads. It splits my one BMB into two and shows wrong values ...

Hi, I tried my SimpBMS the first time :) I have Tesla B-Class satellite units. I believe I connected them correctly. I also tried different ways to connect the data connections. The Tesla unites were not connected to any batteries. I just wanted to see if the temp sensors work.

The SimpBMS was ...