Tool/software:
Hello,
We are evaluating the BQ41Z90 highly integrated BMS IC for our UAV application. Our use case is slightly different from the typical battery-embedded design:
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Instead of placing the BMS IC on the battery side, we are planning to integrate it with the drone autopilot (off-pack BMS).
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This means the IC will not be monitoring the pack in real time when the battery is disconnected.
We would like clarification on the following points:
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SoC accuracy if used off-pack:
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Will the SoC estimation become inaccurate because the IC cannot track the pack continuously?
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Or will the Dynamic Voltage / Impedance Track
(Dynamic z algorithm) be able to immediately re-estimate Qmax and Rint values accurately when a pack is re-connected?
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Need for learning cycles:
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If the IC is on the autopilot side, do we need to perform a few charge/discharge cycles every time we connect a battery to allow the algorithm to relearn?
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Or, if we store the learned Qmax and Rint values on the battery side, would these parameters be sufficient to make the design plug-and-play (no new learning cycles needed)?
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Our goal is to understand whether the design can reliably estimate SoC across multiple packs without continuous monitoring, and whether parameter storage per pack is the correct approach.
Thanks in advance for your support.
