BQ77915: Cell Balancing Management Specs

Chuchen Wang

Part Number: BQ77915

Hi,

My customer would like to know the following specs but cannot find in the datasheet:

Cell balancing management spec.	Enter Condition
	Max Voltage
	Max Cell V - min cell V
	Balancing Current
	Exit Condition Min Cell Volt
	Max Cell V - min cell V

Thanks,

Chuchen

over 7 years ago

0 Chuchen Wang over 7 years ago

TI__Expert 3470 points

Hi,

It looks like the max/min voltage info is shown in Table 2 on page 13. As for the cell balancing current, page 20 shows this is based on the filter resistance R_INI. Please let me know if there's anything else to add.

Thank you,
Chuchen

0 Matt Sunna over 7 years ago in reply to Chuchen Wang

TI__Guru* 81035 points

Hi Chuchen,

The cell balancing feature has a few different parameters that define when it will start balancing, the balancing window size, and the cell balance hysterisis for the over-voltage condition. I am attaching 2 presentations that describe the cell balancing feature in more detail. One presentation is from the Battery Management Deep Dive and one is a specific presentation on cell balancing.

/cfs-file/__key/communityserver-discussions-components-files/196/Introduction_2D00_to_2D00_bq77915_5F00_three_5F00_to_5F00_five_5F00_stackable_5F00_primary_5F00_protector.pdf

/cfs-file/__key/communityserver-discussions-components-files/196/2402.bq77915_2D00_Cell_2D00_Balancing.pdf

I hope this helps,

Matt

Power management

Power management forum

BQ77915: Cell Balancing Management Specs