BMS reading one cell incorrectly

[webbbn]

Yes that is my point there is no need for the 18th feed so why is the facility there on both but is only utilised on the JBD - it's the only cell on the PCB that is asked for a negative and positive feed ?

Either they haven't connected it internally, or they are assuming the BMS is going to be connected to two 8-cell packs, and are trying to eliminate any bias caused by extra resistance between those two packs. I don't know if the BMS requires both pins to be connected, but if so, I don't think it matters where you connect them, as long as they are connected together somewhere.

 

[Genawin]

I have been testing the BMS today and noticed there was an instant change in the readings when the cell 9 negative connection is made and removed , I'm not convinced that it's fully fixed but it's a definite step in the right direction , I'll give it a few days but I think the JBD will be replacing it.