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BQ4050: Cell balancing enable setting.

Dongoh Kang
Prodigy 60 points
Part Number: BQ4050
Other Parts Discussed in Thread: BQSTUDIO,

Tool/software:

Hello.

I set BALANCING CONFIGURATION (0x460f) CB (bit0) = 1 .

but in BQstudio, BAL_EN bit in Gauging Status is still 0.

How can I change the bit, BAL_EN ? 

There is no command for BAL_EN in command window.

  • 0
    Prodigy 60 points

    Okay, I found the way to change BAL_EN bit (only charge mode can support balancing, right?)

    but still CB bit = 0 with cell balancing start condition,

    what should I do for it?

    refer attached filescheck CB.gg.csv

    Fullscreen Check CB.log Download 
    Thu Jul 03 18:39:11 KST 2025

Device Version Info = 9e34_0_01
BQZ Device Name = bq4050
BQZ Firmware Version = V0_01_BLD22

Design Capacity = 4400
Design Voltage = 14400
Specification Info = 0x0031
Manufacturer Date = 1980-1-1
Serial Number = 0x0001
Manufacturer Name = Texas Instruments
Device Name = bq4050
Device Chemistry = LION

Sample,DateTime,ElapsedTime,ManufAccess,RemCapAlarm,RemTimeAlarm,BattMode,@Rate(@),@TimeFull,@TimeEmpty,@RateOK,Temperature,Voltage,Current,AvgCurr,MaxErr,RSOC,ASOC,SOH,RemCap,FullChgCap,RunTimeEmty,RunTimeEmty,AvgTimeFull,ChgCurr,ChgVolt,BattStat,CycleCnt,OpStatA,OpStatB,TempRange,ChgStat,GaugeStat,MfgStat,SafetyAlertAB,SafetyStatAB,SafetyAlertCD,SafetyStatCD,PFAlertAB,PFStatAB,PFAlertCD,PFStatCD,CellVolt1,CellVolt2,CellVolt3,CellVolt4,vBAT,vPACK,CellCurr1,CellCurr2,CellCurr3,CellCurr4,CellPower1,CellPower2,CellPower3,CellPower4,Power,AvgPow,IntTemp,TS1Temp,TS2Temp,TS3Temp,TS4Temp,CellTemp,FETTemp,CEDV_RC,DSGCap,CEDVThr,CEDVFltV,ChgDeficit,LogRowTime(ms),LogStatus
1,2025-07-03 18:39:14,1.306,0x0187,300,10,0x6001,0,65535,65535,1,5.0,15957,49,49,100,21,21,100,898,4400,65535,65535,4288,2500,16640,0x0080,0,0x0187,0x0000,0x02,0x0008,0x10,0x01F0,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,4102,3952,3952,3952,15919,15915,48,41,48,49,20,16,19,19,78,79,23.6,5.0,196.4,196.4,196.1,5.0,-273.2,898,0,14004,14008,0,877,SUCCESS
2,2025-07-03 18:39:14,2.223,0x0187,300,10,0x6001,0,65535,65535,1,5.0,15958,49,49,100,21,21,100,898,4400,65535,65535,4288,2500,16640,0x0080,0,0x0187,0x0000,0x02,0x0008,0x10,0x01F0,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,4102,3952,3952,3952,15919,15916,50,43,49,44,21,17,19,17,78,79,23.6,5.0,196.1,196.4,196.4,5.0,-273.2,898,0,14004,14008,0,812,SUCCESS
3,2025-07-03 18:39:15,3.075,0x0187,300,10,0x6001,0,65535,65535,1,5.0,15958,51,49,100,21,21,100,898,4400,65535,65535,4288,2500,16640,0x0080,0,0x0187,0x0000,0x02,0x0008,0x10,0x01F0,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,4102,3952,3952,3952,15920,15916,47,45,44,44,19,18,17,17,80,79,23.6,5.0,196.0,196.7,196.3,5.0,-273.2,898,0,14004,14008,0,842,SUCCESS
4,2025-07-03 18:39:17,4.347,0x0187,300,10,0x6001,0,65535,65535,1,5.0,15958,49,49,100,21,21,100,898,4400,65535,65535,4288,2500,16640,0x0080,0,0x0187,0x0000,0x02,0x0008,0x10,0x01F0,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,4102,3952,3952,3952,15919,15916,44,47,46,47,18,19,18,19,80,79,23.6,5.0,196.3,196.4,196.5,5.0,-273.2,898,0,14004,14008,0,794,SUCCESS
5,2025-07-03 18:39:17,5.184,0x0187,300,10,0x6001,0,65535,65535,1,5.0,15958,49,49,100,21,21,100,898,4400,65535,65535,4288,2500,16640,0x0080,0,0x0187,0x0000,0x02,0x0008,0x10,0x01F0,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,4102,3952,3952,3952,15918,15916,50,43,45,42,21,17,18,17,80,79,23.6,5.0,196.1,196.1,196.4,5.0,-273.2,898,0,14004,14008,0,821,SUCCESS
6,2025-07-03 18:39:18,6.043,0x0187,300,10,0x6001,0,65535,65535,1,5.0,15958,49,49,100,21,21,100,898,4400,65535,65535,4288,2500,16640,0x0080,0,0x0187,0x0000,0x02,0x0008,0x10,0x01F0,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,4102,3952,3952,3952,15919,15916,49,49,46,50,20,19,18,20,80,79,23.6,5.0,196.5,196.4,196.0,5.0,-273.2,898,0,14004,14008,0,893,SUCCESS
7,2025-07-03 18:39:19,7.033,0x0187,300,10,0x6001,0,65535,65535,1,5.0,15958,49,49,100,21,21,100,898,4400,65535,65535,4288,2500,16640,0x0080,0,0x0187,0x0000,0x02,0x0008,0x10,0x01F0,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,4102,3952,3952,3952,15918,15917,43,49,46,47,18,19,18,19,78,79,23.6,5.0,196.4,196.5,195.7,5.0,-273.2,898,0,14004,14008,0,901,SUCCESS
8,2025-07-03 18:39:21,8.391,0x0187,300,10,0x6001,0,65535,65535,1,5.0,15958,49,49,100,21,21,100,898,4400,65535,65535,4288,2500,16640,0x0080,0,0x0187,0x0000,0x02,0x0008,0x10,0x01F0,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,4102,3952,3952,3952,15918,15916,46,45,50,50,19,18,20,20,80,79,23.6,5.0,196.5,196.4,196.0,5.0,-273.2,898,0,14004,14008,0,834,SUCCESS
9,2025-07-03 18:39:22,9.586,0x0187,300,10,0x6001,0,65535,65535,1,5.0,15958,49,49,100,21,21,100,898,4400,65535,65535,4288,2500,16640,0x0080,0,0x0187,0x0000,0x02,0x0008,0x10,0x01F0,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,4102,3952,3952,3952,15918,15916,51,46,48,41,21,18,19,16,80,79,23.6,5.0,196.4,196.5,196.3,5.0,-273.2,898,0,14004,14008,0,881,SUCCESS
10,2025-07-03 18:39:23,10.504,0x0187,300,10,0x6001,0,65535,65535,1,5.0,15958,50,49,100,21,21,100,898,4400,65535,65535,4288,2500,16640,0x0080,0,0x0187,0x0000,0x02,0x0008,0x10,0x01F0,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,4102,3952,3952,3952,15919,15916,42,53,46,50,17,21,18,20,80,79,23.5,5.0,196.1,196.4,196.3,5.0,-273.2,898,0,14004,14008,0,881,SUCCESS
11,2025-07-03 18:39:24,11.830,0x0187,300,10,0x6001,0,65535,65535,1,5.0,15957,48,49,100,21,21,100,898,4400,65535,65535,4288,2500,16640,0x0080,0,0x0187,0x0000,0x02,0x0008,0x10,0x01F0,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,4102,3952,3952,3952,15919,15915,44,48,45,44,18,19,18,17,78,79,23.6,5.0,196.3,196.4,196.3,5.0,-273.2,898,0,14004,14008,0,898,SUCCESS
12,2025-07-03 18:39:25,12.778,0x0187,300,10,0x6001,0,65535,65535,1,5.0,15957,50,49,100,21,21,100,898,4400,65535,65535,4288,2500,16640,0x0080,0,0x0187,0x0000,0x02,0x0008,0x10,0x01F0,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,4102,3951,3952,3952,15918,15916,51,46,48,46,21,18,19,18,78,79,23.5,5.0,196.3,196.1,196.8,5.0,-273.2,898,0,14004,14008,0,850,SUCCESS
13,2025-07-03 18:39:26,13.665,0x0187,300,10,0x6001,0,65535,65535,1,5.0,15958,49,49,100,21,21,100,898,4400,65535,65535,4288,2500,16640,0x0080,0,0x0187,0x0000,0x02,0x0008,0x10,0x01F0,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,4102,3952,3952,3952,15919,15915,50,46,49,38,21,18,19,15,81,79,23.6,5.0,196.5,196.5,196.4,5.0,-273.2,898,0,14004,14008,0,890,SUCCESS
14,2025-07-03 18:39:27,14.591,0x0187,300,10,0x6001,0,65535,65535,1,5.0,15958,50,49,100,21,21,100,898,4400,65535,65535,4288,2500,16640,0x0080,0,0x0187,0x0000,0x02,0x0008,0x10,0x01F0,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,4102,3952,3952,3952,15918,15916,50,45,48,43,21,18,19,17,78,79,23.6,5.0,197.0,196.3,196.4,5.0,-273.2,898,0,14004,14008,0,890,SUCCESS
15,2025-07-03 18:39:28,16.032,0x0187,300,10,0x6001,0,65535,65535,1,5.0,15958,50,49,100,21,21,100,898,4400,65535,65535,4288,2500,16640,0x0080,0,0x0187,0x0000,0x02,0x0008,0x10,0x01F0,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,4102,3952,3952,3952,15918,15916,44,50,48,44,18,20,19,17,78,79,23.6,5.0,195.7,196.4,195.9,5.0,-273.2,898,0,14004,14008,0,856,SUCCESS
16,2025-07-03 18:39:29,17.135,0x0187,300,10,0x6001,0,65535,65535,1,5.0,15958,49,49,100,21,21,100,898,4400,65535,65535,4288,2500,16640,0x0080,0,0x0187,0x0000,0x02,0x0008,0x10,0x01F0,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,4102,3952,3952,3952,15917,15917,47,42,45,43,19,17,18,17,78,78,23.6,5.0,196.7,196.0,196.7,5.0,-273.2,898,0,14004,14008,0,876,SUCCESS
17,2025-07-03 18:39:30,18.109,0x0187,300,10,0x6001,0,65535,65535,1,5.0,15957,50,49,100,21,21,100,898,4400,65535,65535,4288,2500,16640,0x0080,0,0x0187,0x0000,0x02,0x0008,0x10,0x01F0,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,4102,3951,3952,3952,15920,15916,47,43,45,46,19,17,18,18,80,78,23.5,5.0,196.4,196.3,196.3,5.0,-273.2,898,0,14004,14008,0,865,SUCCESS
18,2025-07-03 18:39:31,19.114,0x0187,300,10,0x6001,0,65535,65535,1,5.0,15957,49,49,100,21,21,100,898,4400,65535,65535,4288,2500,16640,0x0080,0,0x0187,0x0000,0x02,0x0008,0x10,0x01F0,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,4102,3952,3952,3952,15918,15916,46,43,44,44,19,17,17,17,78,79,23.6,5.0,196.4,196.4,196.5,5.0,-273.2,898,0,14004,14008,0,885,SUCCESS
19,2025-07-03 18:39:33,20.454,0x0187,300,10,0x6001,0,65535,65535,1,5.0,15958,50,49,100,21,21,100,898,4400,65535,65535,4288,2500,16640,0x0080,0,0x0187,0x0000,0x02,0x0008,0x10,0x01F0,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,4102,3952,3952,3952,15917,15918,43,53,48,45,18,21,19,18,80,79,23.6,5.0,196.1,196.0,196.1,5.0,-273.2,898,0,14004,14008,0,865,SUCCESS
20,2025-07-03 18:39:34,21.357,0x0187,300,10,0x6001,0,65535,65535,1,5.0,15958,49,49,100,21,21,100,898,4400,65535,65535,4288,2500,16640,0x0080,0,0x0187,0x0000,0x02,0x0008,0x10,0x01F0,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,4102,3952,3952,3952,15919,15918,42,53,48,45,17,21,19,18,78,79,23.6,5.0,196.1,196.1,196.5,5.0,-273.2,898,0,14004,14008,0,885,SUCCESS
21,2025-07-03 18:39:34,22.278,0x0187,300,10,0x6001,0,65535,65535,1,5.0,15957,50,49,100,21,21,100,898,4400,65535,65535,4288,2500,16640,0x0080,0,0x0187,0x0000,0x02,0x0008,0x10,0x01F0,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,4102,3952,3952,3952,15918,15916,48,43,42,46,20,17,17,18,80,79,23.5,5.0,196.4,196.3,196.1,5.0,-273.2,898,0,14004,14008,0,821,SUCCESS
22,2025-07-03 18:39:35,23.140,0x0187,300,10,0x6001,0,65535,65535,1,5.0,15958,49,49,100,21,21,100,898,4400,65535,65535,4288,2500,16640,0x0080,0,0x0187,0x0000,0x02,0x0008,0x10,0x01F0,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,4102,3952,3952,3952,15918,15917,45,46,42,42,18,18,17,17,78,79,23.6,5.0,196.0,195.7,196.4,5.0,-273.2,898,0,14004,14008,0,884,SUCCESS
23,2025-07-03 18:39:37,24.473,0x0187,300,10,0x6001,0,65535,65535,1,5.0,15958,48,49,100,21,21,100,898,4400,65535,65535,4288,2500,16640,0x0080,0,0x0187,0x0000,0x02,0x0008,0x10,0x01F0,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,4102,3952,3952,3952,15920,15917,42,51,44,42,17,20,17,17,78,79,23.6,5.0,196.0,196.4,196.5,5.0,-273.2,898,0,14004,14008,0,893,SUCCESS
24,2025-07-03 18:39:38,25.412,0x0187,300,10,0x6001,0,65535,65535,1,5.0,15958,48,49,100,21,21,100,898,4400,65535,65535,4288,2500,16640,0x0080,0,0x0187,0x0000,0x02,0x0008,0x10,0x01F0,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,4102,3952,3952,3952,15920,15915,47,51,45,41,19,20,18,16,75,78,23.5,5.0,196.1,196.4,196.4,5.0,-273.2,898,0,14004,14008,0,1000,SUCCESS
25,2025-07-03 18:39:39,26.446,0x0187,300,10,0x6001,0,65535,65535,1,5.0,15958,48,49,100,21,21,100,898,4400,65535,65535,4288,2500,16640,0x0080,0,0x0187,0x0000,0x02,0x0008,0x10,0x01F0,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,4102,3952,3952,3952,15918,15918,42,48,44,41,17,19,17,16,78,78,23.6,5.0,196.1,196.3,196.5,5.0,-273.2,898,0,14004,14008,0,838,SUCCESS
26,2025-07-03 18:39:41,28.552,0x0187,300,10,0x6001,0,65535,65535,1,5.0,15958,48,49,100,21,21,100,898,4400,65535,65535,4288,2500,16640,0x0080,0,0x0187,0x0000,0x02,0x0008,0x10,0x01F0,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,4102,3951,3952,3952,15919,15916,48,44,48,42,20,17,19,17,80,78,23.6,5.0,196.4,196.4,196.1,5.0,-273.2,898,0,14004,14008,0,860,SUCCESS

  • 0 in reply to Dongoh Kang
    TI__Mastermind 24931 points

    Hello, 

    Please expect a delayed response while I review this. 

    Regards, 

    Jonny.

  • 0 in reply to Jonny
    Prodigy 60 points

    please check this question.

  • 0 in reply to Dongoh Kang
    TI__Mastermind 24931 points

    Hello, 

    The BAL_EN bit just indicates that cell balancing is active. For the BAL_EN bit to get set, the cell balancing configuration parameters must be met, and the CB bit must be set. Please refer to the BQ4050 TRM for the cell balancing operation. 

    Regards, 

    Jonny. 

  • 0 in reply to Jonny
    Prodigy 60 points

    Hello, I already know about yout guide.

    My BQ4050 set BAL_EN and my cells are in imbalanced status,

    but I don't know why CB bit doesn't change 0 to 1.

    (means not processing CB)

    please check with attached log and gg file.

  • 0 in reply to Dongoh Kang
    TI__Mastermind 24931 points

    Hello, 

    I am not sure I fully understand what you are asking here. The CB bit is something that you change, not the gauge. This bit can be changed by using the data memory tab, or by directly writing to the Balancing Configuration register. 

    Regards, 

    Jonny. 

  • 0 in reply to Jonny
    Prodigy 130 points

    Dongoh Kang probably meant the OperationStatus()[CB] bit...

  • 0 in reply to telix
    TI__Mastermind 24931 points

    Hello, 

    I am not sure what the issue is here. It looks like the CB bit is set. If you have any confusion on when a specific bit is supposed to be set, how a bit is supposed to be set, or what a certain bit does, please refer to the device's Technical Reference Manual. This is described in the Technical Reference manual. 

    Regards, 

    Jonny.