I have been developing a BMS with bq76pl536, and I tested the system up to 6 devices. When I connected the 7th, the system did not see the last device (the north one). I have the same problem with 8 and 9 devices, (I can only monitor the first 6 modules). Each device have 6 LiFePO4 cells connected in series, so the voltage of the battery pack is near 200V. I checked that the hardware of the devices was okey (changing the positions of the modules in the system) and I had the same situation.
I checked with the TI Interface (bq76pl536-Q1 Evaluation Software) that there is no problem with my developed software. I can only see 6 devices with the TI Interface too. I belive that this is a problem of the SPI bus, but I do not know how I could find a solution and which could be the reason of this failure.
Furthermore, there is no Alarm or FAULT, so I can work properly with the first 6 modules.
How can I solve this problem?
