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End-to-end battery management

Pete Horne
Prodigy 30 points
Other Parts Discussed in Thread: BQ28Z610

I need to manage the battery for a new product.  The configuration will be either 2S or 2S2P LMO - this choice will be probably depend on mechanical rather than electrical design considerations.  I think I need:

1.  Primary protection including over-voltage, under-voltage, over-current, temperature.  I assume that the PTC and any other temp sensors will need to be very close to the cells, if not attached to them.  Can the rest be on a nearby (a few inches away) PCB?  So far, I've struggled to find primary protection for >1S.

2. Secondary protection.  Is more than OVLO needed?

3.Charge balancing

4. Fuel gauging with simple interface to a micro.  I'm assuming that the micro won't have much to do with battery management beyond requesting charge state at some suitable interval.

5. A charging solution compatible with the above.

What do you recommend?

  • 0
    TI__Guru** 105590 points

    Hello Pete,

    From a gauge and protector perspective I would recommend the bq28z610 which also contains protection capabilities. What are the exact specs for the batteries? What's the chemistry?

    You can use this webpage to help find parts with the specs you need: www.ti.com/.../products.html

    For charging I recommend linking a part you're looking at and discussing with our chargers team (the product linked decides which group answers the post)

    Sincerely,

    Wyatt Keller