https://github.com/arkhipenko/bq27427-arduino

Arduino library for TI BQ27427 LiPo battery gauge
https://github.com/arkhipenko/bq27427-arduino

Last synced: about 1 year ago
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Arduino library for TI BQ27427 LiPo battery gauge

• Host: GitHub
• URL: https://github.com/arkhipenko/bq27427-arduino
• Owner: arkhipenko
• License: bsd-2-clause
• Created: 2025-03-23T03:56:18.000Z (over 1 year ago)
• Default Branch: main
• Last Pushed: 2025-03-23T04:04:11.000Z (over 1 year ago)
• Last Synced: 2025-03-23T04:27:23.246Z (over 1 year ago)
• Language: C++
• Size: 0 Bytes
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
Inspired by https://github.com/sparkfun/SparkFun_BQ27441_Arduino_Library

Based on Zephyr bq274xx driver: https://github.com/zephyrproject-rtos/zephyr/tree/main/drivers/sensor/ti/bq274xx

Current Arduino adaptation is based on FreeRTOS.

Datasheet: https://www.ti.com/product/BQ27427

Contributions and improvements welcome!

I2C commands are described here: https://www.ti.com/lit/ug/sluucd5/sluucd5.pdf

ABOUT Chem IDs:

​The Texas Instruments BQ27427 is a single-cell battery fuel gauge that utilizes the Impedance Track™ algorithm to provide accurate battery capacity measurements. This gauge comes pre-programmed with three selectable chemistry profiles, each identified by a unique Chemistry ID (ChemID):​

 - ChemID 0x3230: Corresponds to a 4.2V lithium-ion cell.​

 - ChemID 0x1202: Corresponds to a 4.35V lithium-ion cell.​

 - ChemID 0x3142: Corresponds to a 4.4V lithium-ion cell.​

These ChemIDs are defined in the Zephyr project's sensor bindings for the BQ27427:​

 - BQ27427_CHEM_ID_A: 0x3230​

 - BQ27427_CHEM_ID_B: 0x1202​

 - BQ27427_CHEM_ID_C: 0x3142​

When configuring the BQ27427 for your application, it's essential to select the ChemID that matches the nominal voltage of your lithium-ion battery to ensure accurate fuel gauging. For more detailed information, you can refer to the BQ27427 product page on Texas Instruments' website. ​