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BQ40Z50-R2: BQ40Z50 degradation and hardware-based protection

Part Number: BQ40Z50-R2


1.For Cell Swelling Degradation , Cycle Count Degradation,and Runtime Degradation ,Whether their effect of improving battery life has been verified? 

2.If one of hardware-based protections AOLD, ASCC, and ASCD1,2 is tripped,whether both CHG and DSG FETs are off ?

  • Hello Ran,

    These degradation methods reduce the charge voltage and current, many battery studies show direct links to the max charge voltage and high charge currents degrading battery health. If you are interested in the features and why they were created, I would recommend reviewing some of the IEEE battery analysis papers on degradation which will have the examples and explanations. There's also some good open reference on battery university:

    Yes both FETs are disabled for the hardware protections. But after the firmware reads the AFE register one FET will recover depending on the protection triggered.


    Wyatt Keller