Other Parts Discussed in Thread: GPCCHEM
Hello
I am developing an application that assumes battery replacement.
The bq27520-g4 is mounted on the system side.
I evaluated the Fuel Gauge with the following procedure, but it seems that the battery was not selected correctly.
1st : Write .bqfs file to Fuel Gauge
2nd : Insert the degraded battery and perform charge/discharge cycles to confirm that the FCC value decreases
3rd : Perform 10 charge/discharge cycles to ensure sufficient learning
4th : Verify correct battery pack selection by inserting a new battery and verifying that the FCC value is close to the default value.
The FCC value does not approach the default value after the 4th implementation, and the monitoring IC seems to recognize that a degraded battery has been inserted.
Could you please let me know if you have any idea why or how to fix it?
Note
① It is assumed that the user will insert a degraded battery after shipment.
② After obtaining the Chem ID using the GPC tool, a learning cycle was performed.
③ Using the Fast Qmax feature
④ The default value of FCC value is about 3000mAh
⑤ The FCC value for a degraded battery is around 2200~2400mAh