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| { | |
| "ticketNumber" : "886080", | |
| "reporterName" : "Maxim Fiodorov", | |
| "rankPoints" : "70", | |
| "resolutionStatus" : "TI Thinks Resolved", | |
| "ticketName" : "BQ40Z80: 7th cell calibration problem.", | |
| "rankName" : "Prodigy", | |
| "replies" : " 9", | |
| "views" : " 91", | |
| "queryText" : "Part Number: BQ40Z80 Hi everyone. I have a problem with cell calibration by battery management studio 1.3.86. I set each of 7 cells to 4V on resistors voltage divider. I eter the values for calibration (see attached picture). But I always get 7th cell near 3940mV ad not near 4000mV. All other cells are near 4000mV. Only if I manually adjust VC7 Sense Gain I achieve desired 4000mV at 7th cell. Does anyone had the same problem with calibration by battery management studio 1.3.86.??? Is there any solution to this? I attache 2 gg files with manual and battery studio calibration. bq studio calibration.gg.csv manual calibration.gg.csv", | |
| "partNumber" : " BQ40Z80", | |
| "allResponseList" : [ { | |
| "contentId" : "3277767", | |
| "userName" : "Kang Kang", | |
| "rankPoints" : "17055", | |
| "rankName" : "Genius", | |
| "date" : "Mar 6, 2020 3:07 AM", | |
| "userId" : "3528441", | |
| "content" : "Hello Maxim I'm assigning this to device expert. Expecta response within 2 days." | |
| }, { | |
| "contentId" : "3279217", | |
| "userName" : "Maxim Fiodorov", | |
| "rankPoints" : "70", | |
| "rankName" : "Prodigy", | |
| "date" : "Mar 8, 2020 6:53 AM", | |
| "userId" : "4479536", | |
| "content" : "I forgot to mention when I adjust manually VC7 Sense Gain the BAT pin voltage get adjusted correspondingly but it still inside 1% battery voltage error range. I get the same phenomenon on my design and on evaluation board." | |
| }, { | |
| "contentId" : "3283550", | |
| "userName" : "Andy Liu (BMS)", | |
| "rankPoints" : "42410", | |
| "rankName" : "Mastermind", | |
| "date" : "Mar 11, 2020 10:18 PM", | |
| "userId" : "1864278", | |
| "content" : "The Cell 7 voltage is handled differently from the voltage of other cells. Let me try my EVM and see if there is a way to help you." | |
| }, { | |
| "contentId" : "3287665", | |
| "userName" : "Kang Kang", | |
| "rankPoints" : "17055", | |
| "rankName" : "Genius", | |
| "date" : "Mar 16, 2020 8:53 PM", | |
| "userId" : "3528441", | |
| "content" : "Please try on the test version (1.3.100), I believe this issue should be resolved. Thanks!" | |
| }, { | |
| "contentId" : "3293422", | |
| "userName" : "Maxim Fiodorov", | |
| "rankPoints" : "70", | |
| "rankName" : "Prodigy", | |
| "date" : "Mar 22, 2020 1:52 PM", | |
| "userId" : "4479536", | |
| "content" : "I have tried 1.3.100 version of bq Studio. The problem still exist." | |
| }, { | |
| "contentId" : "3302415", | |
| "userName" : "Andy Liu (BMS)", | |
| "rankPoints" : "42410", | |
| "rankName" : "Mastermind", | |
| "date" : "Mar 31, 2020 5:42 PM", | |
| "userId" : "1864278", | |
| "content" : "Hi Maxim, I guess what you try is to follow the steps in Section 2.2 of the following app note and see if you can have better calibration results. <secret URL>/lit/an/slua868/slua868.pdf Andy" | |
| }, { | |
| "contentId" : "3313090", | |
| "userName" : "Maxim Fiodorov", | |
| "rankPoints" : "70", | |
| "rankName" : "Prodigy", | |
| "date" : "Apr 12, 2020 12:51 PM", | |
| "userId" : "4479536", | |
| "content" : "slua868.pdf describe how to calculate the calibration coefficients. I am doing it myself to correct wrong calibration by Battery Management Studio program. My problem is the wrong calibration by Battery Management Studio." | |
| }, { | |
| "contentId" : "3322042", | |
| "userName" : "Andy Liu (BMS)", | |
| "rankPoints" : "42410", | |
| "rankName" : "Mastermind", | |
| "date" : "Apr 20, 2020 10:28 PM", | |
| "userId" : "1864278", | |
| "content" : "I will report this issue to my software team so that they can double-check if it is necessary to update their existing code. Andy" | |
| }, { | |
| "contentId" : "3323099", | |
| "userName" : "Shirish", | |
| "rankPoints" : "2420", | |
| "rankName" : "Intellectual", | |
| "date" : "Apr 21, 2020 3:50 PM", | |
| "userId" : "28063", | |
| "content" : "Do you get the same result in bqStudio if you uncheck \"Calibrate Pack Voltage\"?" | |
| } ], | |
| "tags" : [ "/support/power-management/f/196/tags/bq40z80" ], | |
| "fourmType" : "TI" | |
| } |