BQ27220: Issue facing is SOC drop from 48% to 7% when Load is attached.

Hello Hitesh,

Have you used the GPCCEDV tool to update the gauging parameters on the gauge?

Regards,
Nick Richards

Hi Nick,

I am using Single cell battery - Lithium ion - 3.7V , 2.6Ah . Can you help me how to calculate gauging parameter ? How to use the GPCCEDV tool ?

Hello Hitesh,

Yes, follow this PDF to learn how to use the GPCCEDV tool. www.ti.com/.../sluub45b.pdf

Regards,
Nick Richards

Hi Nick,

I have read the Document , but what are the below paramaters?

• ChemType = <1 is LiCoO2(default), 2 is NiMH, 3 is Lead-Acid, 4 is LiFePO4, 5 is Lithium Titanate, 6 is
NMC or NCA>-------------I am using Li -Ion battery so what could be written?
• VoltageColumn = <Zero based column number for the voltage data in your data logs>
• CurrentColumn = <Zero based column number for the current data in your data logs>
• TemperatureColumn = <Zero based column number for the temperature data in your data logs>
• ElapsedTimeColumn = <Zero based column number for the elapsed time data in your data logs>
• FitMaxSOC% = <Integer ranging from 8 to 14. Typical is 12>
• FitMinSOC% = <Integer ranging from 2 to 6. Typical is 6>
• LearnSOC% = <Integer ranging from 5 to 12. Typical is 7

Please guide me for this

Hey Hitesh,

Can you send me the datasheet for your battery so I can verify what you should put ChemType.
Voltage Column, Current Column, Temperature Column, Elapsed Time Column are based on the data log you collect. These values correspond to the column  that the data is in.
For fitMaxSOC, FitMinSOC, and LearnSOC I would set those to the typical value.

Regards,
Nick Richards

Hi Nick,

Please find below details for battery.

Hello Hitesh,

For ChemType, put 6.

Regards,
Nick Richards