Battery Monitoring

I have built battery monitors in the past that have a better idea of battery.

I have started this, see Projects Battery Monitor

Purpose:

• Show more accurate state of charge (SOC)
• Count battery cycles, allowing for better understanding of longevity of battery
• Remote viewing - display
• Remote viewing - Bluetooth/WiFi

Basic

A basic version that just monitors voltage will already be useful. Capturing all data should be good to experiment with.

An interesting idea is to keep track of voltage over time.

Voltage

This is a good start. Nice thing about a bettery monitor is we can watch this over time rather than the instantanious reading. This means we can give you more real world approximation of remaining power

Current

Using a shunt, looses a tiny bit of voltage (usually about 0.1V) and allows you to measure very high currents. This kind of setup of setup is a little more complicated. If I can do it that allows me to not only view the current used but also put into the battery, should allow me to very accurately measure state of charge.

Display

A display can easily be used to show the current information we know about.

Bluetooth/WiFi/LoRa

Radio to connect to WiFi, uploading data. Bluetooth to see on your phone instead of display above. Or LoRa for access to data anywhere LoRa is. Could also use cellular for another cost.