Hi,
We are considering using the BQ40Z80 for an application with a 6S, approx 4AH li-po battery pack.
I'm currently using the BQ40Z80EVM-020, and the device appears to cater to our requirements for balancing, monitoring, protection, and gauging.
However, one additional requirement we have, is to allow for multiple battery packs to added to the Device being powered, to extend run time. The packs would be wired in parallel to maintain the same voltage with extended AH capacity. The number of packs added to the one device, will depend on how long the user wants to extend run time.
If each battery pack includes it's own BQ40Z80-based BMS, is it possible to configure the pack to talk to other BQ40Z800 based packs connected to the same SMBus?
The purpose of this networking would be:
- To have the ability to press a button on any one of the battery packs to activate the output of that pack (enable the DSG FET), as well as any other pack connected to the same SMBus (without having to turn on each pack individually)
- Communicate the status of each pack to the device (remaining charge, cell voltages, etc)
- Allow any one of the packs to shut down it's output in the event of a protection function being tripped, while allowing the other packs fitted to the device to continue powering the device
I have attached a diagram to illustrate the basic architecture.
Thank you,
regards,
Daniel