In-flight monitoring of total battery voltage and individual cell voltage is important for accurately estimating flight time. Monitoring the cell voltages during flight and operating load conditions help to predict battery health and cell degradation.
We designed a battery monitor board to interface with pixhawk to read the cell voltages of flight battery. We will be doing a 50 piece production run of the boards in the second week of march,2018. Anyone interested in the board, please PM me.
Currently available battery monitors drain over 20mA and will drain the battery if left connected and very few monitors currently support over 6 cells.
The specs for our monitor are:
Max cell count: 10
Active current drain: <5mA
Total sleep current: < 20uA
Sleep current drain per cell: <1uA
Interface with autopilot: i2c , UART (will implement other protocols if there is interest)
Pics of first version monitor