Cell Balancing in Bq20z95

Deepak Bansal

One of battery pack has 3S_6P configuration. (3 series-6parallel). I set Min cell Deviation as 1750. I am giving learning cycle to my board by C/4 rate. But by cells don't seem to get balanced. IS there any parameter need to be changed for achieving balancing if no. of parallel cells increases.

Regards

Deepak

over 13 years ago

0 Chase7071949597 over 13 years ago

TI__Genius 10235 points

Cell balancing in Z-track gauges is very slow (<10mA). You will not see any noticeable balancing over the course of one cycle. The higher the pack capacity, the longer balancing will take, depending on the severity of the imbalance. The balancing algorithm is not intended to fix large imbalances. It is only intended to keep cells that are already in balance balanced for a longer period of time to extend the life of the battery pack.

0 Deepak Bansal over 13 years ago in reply to Chase7071949597

Expert 2395 points

Hi Chase,

Thanks for your reply.

Do you mean if I charge a pack, then Z- track guages will try to balance cell by passing 10mA current greater in lower voltage cell as compared to current of cell having higher voltage.

0 Chase7071949597 over 13 years ago in reply to Deepak Bansal

TI__Genius 10235 points

Close, but not quite. It actually looks at the difference in state of charge of each cell rather than the voltage.

0 Deepak Bansal over 13 years ago in reply to Chase7071949597

Expert 2395 points

Thnaks very much Chase for your reply

0 Deepak Bansal over 13 years ago in reply to Chase7071949597

Expert 2395 points

Thanks very much Chase for your reply

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Cell Balancing in Bq20z95