We have a BQ40z50-R1 in a 4S1P lithium pack. They are used in quote a demanding application to drive a brushless motor which, under full load, can pull 25-30A.
For the most part, the BQ is reliable and accurate. However, under certain circumstances (when the motor is repeatedly and momentarily loaded heavily) it cannot keep up with the fluctuating voltage. This causes the SoC to momentarily drop by several 20+%. The SoC is visible to the user via 5 LEDs. In order to stop the LEDs jumping around, we have set the LOCK0 bit and disabled the RSOC recovery - i.e. the RSoC can only go down.
Is there any way we can improve the response of the BQ to prevent to SoC jumping around under this extreme pulse load?
