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BQ25155: charging limits for extended battery life

Lenio Cacula
Genius 16700 points
Part Number: BQ25155

A lot has been said in the press about safe charging limits for Li-Ion batteries. The most common is 40 to 80%. Do we have a more formal document that discusses that topic? I am used to seeing the slide below, but it does not discuss discharge levels and the impact on battery longevity. Any input is highly appreciated!

  • 0
    TI__Genius 12485 points

    Hi Lenio,

    Long time! This is a good question. I have seen requirements to either stop discharging completely or bring voltage to a low threshold at high or low temperatures come up often but almost all of it is driven by the battery supplier. 

    We released an App note on a semi-automatic discharge mechanism a little while ago and can help you with implementation but I can check to see if I  have any documents that provide data on the longevity of batteries under temperature stresses. 

    https://www.ti.com/lit/an/slua976/slua976.pdf

    I am also copying the protector folks to see if they have any material as well. 

    Regards,

    Gautham