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TI Home » TI E2E Community » Support Forums » Power Management » Battery Management » Battery Management - Gas Gauge Forum » Gas gauge IC adjust capacity during 16% and 4%
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Gas gauge IC adjust capacity during 16% and 4%

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Jason Chen10360
Posted by Jason Chen10360
on Apr 09 2012 19:07 PM
Intellectual965 points

Dear all

    One customer test with the battery pack. finding that the RSOC adjust 16% to 18% dunring unplug the adapter. Another time, the battery pack adjusts the RSOC from 4% to 5% during the running 3D Mark..Why does these??   As i know, the gas gauge IC should adust RSOC during every 11.1%

  My battery pack is assmebled with 2S2P using bq20z75_v180. the terminated voltage is set to 6200mV. ..

Best regards..

bq20z75 RSOC
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  • Chase7071949597
    Posted by Chase7071949597
    on Apr 10 2012 13:37 PM
    Expert6520 points

    Are you sure the gauge isn't resetting? OCV readings also cause FCC and RSOC adjustments and a reset will force an OCV. Do you happen to have a log file showing this behavior?

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  • Jason Chen10360
    Posted by Jason Chen10360
    on Apr 10 2012 20:37 PM
    Intellectual965 points

    Hi Chase

        Please check to the attached file...The data is logged by computer sider via EC not via EV2300..

    2275.4%-5%1.xls

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  • Chase7071949597
    Posted by Chase7071949597
    on Apr 11 2012 13:16 PM
    Expert6520 points

    Those are just grid point updates. In the last 20% SOC, or so, the Ra updates occur approximately every 3%. FCC is also updated during these updates.

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