RE: CR2032 battery measurement event

Jingar — Tue, 22 Sep 2020 11:20:05 GMT

Thanks for response. I will try to get info from google.

RE: CR2032 battery measurement event

awneil — Thu, 17 Sep 2020 09:10:24 GMT

It's a bit confusing to use "SOC" with 2 different meanings!

If you measure the voltage immediately after waking up from sleep, the battery will be "rested" - so you'll get an unrepresentatively high value.

If you measure the voltage during the radio Tx or RX, that will be at the point of maximum power drain - so you may get an unrepresentatively low value

Besides all of which:

[quote userid="92946" url="~/f/nordic-q-a/66024/cr2032-battery-measurement-event"]My final goal is to represent accurate battery SOC based on voltage measurement[/quote]

but that's a fundamentally flawed approach: voltage measurement is a rather poor indicator of state-of-charge - especially for lithium batteries!

There's a lot of research been done on this - it's not specific to Nordic - so some googling should get you general information ...