I am using 2 x 20V (6.5A) batteries each behind its own 12V buck convertor. The 12V outputs from the buck converters are then combined in parallel to feed the power distribution (Holypro PM07). The power distribution board connects to my Pixhawk 6C via the Power 1 port. This is monitored in Mission Planner on battery 1.
The issue I have is I want a failsafe when either of the 20V supply batteries drops to 15.3 volts. The Pixhawk 6c and Mission Planner are monitoring the 12V side. How do I monitor each of the 20V batteries and connect to Pixhawk (I2C??, Telem 3, Frysky X8R Receiver) and develop a failsafe on MP for each of them? Any help is appreciated as I haven’t been able to find much information on the Internet about this scenario. Thanks
I think the two battery monitors should be connected to the battery output before their power is fed into the regulators.
Once that’s done it should be possible to setup the BATT_ parameters so that a 3rd virtual battery is the minimum voltage of the two real battery monitors and then that can be used for the failsafe
Thanks for the quick response. The only thing I currently use to monitor voltage is the Holypro power board PM07 after the buck converters . I want to drive my ESC motors with 12v and not 20V. Do I need to get 2 more power monitors and place them on the 20v side and connect each one to the Power 1 and Power 2 on the 6c?
Also not sure how to set up a virtual battery for failsafe.