Hi,
I am trying to implement the fuel gauging into our design, but I don't have much experience with fuel gauge chip. I have couple questions regarding BQ27441-G1.
1. From my understanding BQ27441-G1 utilizes impedance tracking method for predicting the battery capacity, which means it has the advantages that device doesn't have to go to full discharge and charge cycle in order to get sort of accurate predicted capacity value. Instead, I need to run the charge and discharge cycle with a golden standard and create the golden image, then load the golden image too the rest of devices in production? As the user received the devices, and start to using the devices, the fuel gauging chip will update the information as the battery charge and recharge?
2. I tried to update the chemistry ID using gauge studio, by selecting the chemID then click update chemistry, but the system always got stuck and kept going forever, crash. I turned off the load and the battery is not charging when I did that. The question is it suppose to take very long to update the chemistry ID?
3. Reading the technical reference guide, it seems the chemID can only be read but not write through I2C? How do I configure ChemID? Is the ChemID part of the golden image information that get loaded onto the BQ27441?
4. Our design has microcontroller communicate with BQ27441-G1 via I2C, is there anyway that this golden image could be loaded to the fuel gauge chip from the host microncotroller? Say if the user replace the rechargeable battery, mcu start up and pull BIN pin low to signal a battery instert to BQ27441-G1 chip. Then ideally, in the mcu firmware, we would need to reload the golden image to the fuel gauge chip?
Thanks,
Nelson
