Other Parts Discussed in Thread: BQ34Z100-G1
Tool/software:
Hello,
I am using the BQ34Z100-R2 fuel gauge on a custom PCB with two 12V, 22Ah lead-acid batteries in series. I have successfully calibrated the fuel gauge with my battery pack, completed a full learning cycle, and generated a golden image, which I have verified to provide accurate State of Charge (SoC) readings.
I am now preparing to integrate new batches of PCBs with the golden image and would appreciate clarification on the following process:
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For each new PCB, I understand that I need to pair it with its respective unique set of batteries, flash the golden image, and recalibrate voltage, current, and temperature if necessary. Once IT is enabled, will the gauge be ready to provide accurate SoC, or does the fuel gauge need additional learning from the new batteries? Specifically, how does the gauge determine the initial SoC immediately after flashing the golden image on a blank fuel gauge with a a set of batteries??
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I have noticed that when I flash the golden image onto a new PCB with new batteries at different SoC's, the SoC often jumps to 100%? Is this expected behavior? Should I perform a full charge and discharge cycle for the gauge to accurately learn the newly mounted battery’s SoC, or is there a more efficient approach?
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If the batteries connected to each PCB are at varying SoC levels when first installed, would this cause any issues with gauging accuracy? Would it be best practice to ensure all batteries are fully charged before flashing the golden image to avoid initial SoC discrepancies?
I would appreciate any guidance or recommendations on how best to manage this process for easy programming of the golden image gauging across multiple PCB batches.
Thank you for your support.
Br,
Mathias