Battery models of CR2050 and CR2077 for nPM2100

[Christian Saminger]

We are using the nPM2100 with a CR2050 and CR2077 battery. There is a battery model for the CR2032 coin cell in the nrfxlib. Are there also battery models available for CR2050 and CR2077? If not, what is the best way to use the fuel gauge of the nPM2100 with these battery types?

Best,

Christian

[Tharaka]

Hi

For the CR2050 and 2077 battery, i would propose to use  Lithium CR2032 coin cell model which has similar voltage characteristics.
CONFIG_BATTERY_MODEL_LITHIUM_CR2032
https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/samples/pmic/native/npm2100_fuel_gauge/README.html#overview

Regards 

Tharaka

[Christian Saminger]

Hi Tharaka,

thanks for your reply! We will use the battery model of the CR2032 coin cell as you suggested. Please let me know if a battery model for CR2050/77 becomes available in the future.

Best regards,

Christian

[Tharaka]

Hi Christian 

I suggest starting with the existing CR2032 model for your application. It should work for most typical BLE use cases because the nPM2100 fuel gauge is primarily voltage-based and CR-series cells share similar voltage characteristics. If you encounter issues, reach us again and include fuel-gauge logs in this format: Timestamp, V: 1.188, T: 20.62, SOC: 25.00.

Regards 

Tharaka

[Christian Saminger]

Hi Tharaka,

That's ok for me. Thanks for your help!

Best regards

Christian