Other Parts Discussed in Thread: BQ24715
Hi everyone,
I want to somewhat start an ongoing forum here as I will have a lot of questions. I have asked in the past on the BQ10z50-r2, although now I'm integrating multiple systems.
Essentially this is where I'm headed:
I've attached this as a PDF as it seems like the clearest way to handle this. Essentially I will have a battery pack consisting of 2 series connected 18650 batteries directly in parallel with another 2 series connected batteries (2s2p).
I plan on connecting the BQ40Z50-R2 as a master directly to the BQ24715 (slave), so that it can send it charge commands. Furthermore, for the final solution I plan on making this battery pack hot swappable. Essentially I would want multiple of these to be able to connect to the high level system in parallel. Seeing as the BMS ic all have the same id, I will be using an stm32 to communicate the values from the smbus to the HLS via CAN and will also program the values to the BMS via the stm32.
1) My first question would be whether the BMS and Battery charger are compatible and can communicate with each other directly? I haven't seen this written anywhere, although I could easily have overlooked it.
2) Secondly, i would like to understand the Vgs voltages on the bq40z50-R2 a bit better. I'm very unclear on how these voltages are generated. What does the BMS use as a source reference to generate these voltages. So far I've only seen Vcc going to the common point...
3) Could you please check my schematic for any glaring faults. I've tried to double check everything and reread the datasheets, although it feels like I'm still missing something. Any and all questions are welcome. I will be posting a lot of follow up questions here as I go.
Thanks in advance for any and all help!
