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Does modelgauge reset its learning when the battery is removed

Category: Datasheet/Specs
Product Number: MAX17048

Dear ADI Engineers,

In our schematics, we have the VDD and VCELL pins of the MAX17048 tied together to the Li-ion battery but after a disconnect switch. This means that when we turn OFF the switch, the chip is fully (both pins) disconnected from the battery.

1. I know that the battery fuelgauge learns from the battery behavior and corrects for the SOC errors (the correction is different between if the battery is being relaxed or not). So, if we disconnect thebattery from the chip, does this "learning" process repeat all the time?

2. What happens if we always tie the VCELL to the battery but disconnect only the VDD? Does this help with maintaining the SOC error minimal for both relaxed and unrelaxed SOC.

3. Finally, what does it mean by by "relax," and how do we define it in the context of battery insertion. After battery is inserted in the system, it will draw power (minimally, 50mA) to turn on the processor. What current level to consider the battery is in relaxed state?

All of the above questions are based on the Figure 5. ModelGauge Heals Error Automatically

Thank you in advance and I hope to hear from you.

Khoi 

Edit Notes

Added some wordings for clarity
[edited by: kdl54 at 2:55 PM (GMT -4) on 28 Jul 2025]