Cell Balancing S32K348 + MC33774 (HVBMS800SCT)

[ShivaB]

Hi @mariuslucianand ,

I was trying to implement cell balancing algorithm on S32K348 using MBDT blocks.

1. Are there any manual available for cell balancing modes ?

2. Which block sets are available to set or unset cell balancing ? Are these the same blocks as described in this community post. I couldn't find them in BCC Cell controller library ?

Solved: Issue of MC3377XB_BALANCING_MBDT_BLOCK - NXP Community

3. I am trying to do combination of current monitoring + cell voltage delta + time based monitoring for cell balancing. Ideally current monitoring to ensure we don't discharge much  and voltage delta to check imbalance and time based to ensure not do perform cell balancing too long. The query is if I try to check delta for three short time based intervals , as voltage measurement shall be disabled during cell balancing activation - What is the default voltage shown for any cell if its being balanced ? Is it the last known value which will be held ?

4. From emulator perspective, ideally its a slider so we could create a delta voltage difference but in real battery discharge could be more than 250mA ? Is there a way , we could measure current using the CMU's to check it doesn't exceed more than a value.By default my understanding is that AUTO-PAUSE is set when cell voltages are measured , so do we need to turn off measurement , perform cell balance , then again auto-pause and then measure cell voltages ?

[ShivaB]

Adding to the above query, Ideally I want to do voltage based cell monitoring. I see from the data sheet some configuration could be set to enable this but I am not clear how could i set voltage threshold for cell balance to be active?  My understanding is that voltage based cell balancing is automatically enabled but I am unable to see how I can set threshold in MBDT ? 

[ShivaB]

Can some one please help on this query ?

[ShivaB]

Please respond on this query.