Hi! Looking for tips on how to remotely measure battery level/voltage.
We are using BlueRobotics Lithium-ion batteries in a custom setup with 6 of those batteries in parallel. We are looking for a simple fuel gauge to remotely measure battery voltage, that can feed battery data into a Raspberry Pi. Something like the battery cell checker would be perfect, that is, if it’s able to communicate by I2C or some other sort of serial. As far as I know, most off-the-shelf fuel gauges are for single cells, and won’t work for the 4S6P BR batteries.
An resistor and ADC setup could be possible, but if there are any quicker/simpler solutions that would be much preferred.
This isn’t something I’ve looked into in depth, but from a brief search the closest potentially relevant thing I found was some automotive battery monitors from Texas Instruments.
If that’s not a fruitful path then likely your best bet is setting up an ADC + resistor combo and multiplexing between the packs (or even between the cells). The voltage generally shouldn’t change super quickly, so it should be sufficient to just repeatedly cycle through the measurements instead of needing several ADCs to measure all the packs (or cells) at the same time.
Quite a late reply, but thank you for the helpful suggestions. We are trying the INA260 for now, which we only just recently got to order, as they have been out of stock everywhere I have looked. We haven’t implemented them yet, but they seem quite promising.