BQ40Z50: First charge cycle only goes to 98%

Brian Sparks

Part Number: BQ40Z50

I have made a BMS based on the BQ40Z50. Did the learning cycle, Made a golden file.

First time the packs charge, most stop around 98% and never get to 99% or 100% (I have bit set to require EOC success to go to 100%).

Is this because the FCC it learned is higher than the average pack? How can I fix that?

over 7 years ago

0 Batt over 7 years ago

TI__Mastermind 42535 points

What are your charge termination settings? You can set CSYNC to sync RM to FCC when primary charge termination happens. This will fix your 100% RSOC requirement.

0 Brian Sparks over 7 years ago in reply to Batt

Prodigy 40 points

I already have that set. So I assume the charger must be shutting off before a VCT is met?

0 Batt over 7 years ago in reply to Brian Sparks

TI__Mastermind 42535 points

Yes. That is correct.

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BQ40Z50: First charge cycle only goes to 98%