TI中文支持网Other Parts Discussed in Thread:BQ28Z610, GPCCHEM
Hello Sir/Madam,
I am using bq28z610 with Panasonic NCR 18650f(2900 mah) Battery. I have completed the learning cycle and the full charge capacity value is good and the SOH is 94%. So everything is OK. But when I connected with real-time production, the problem arose.
My product average current value is 10-12 ma/h, and when data is sent or received with a 4G modem, only that time the current value will be above 200mah(Spike Load). Simultaneous charging (solar panel) and discharge process are worked.
problem1:When the morning sunlight comes up, so the charging process begins. That time suddenly changes the value of RM, FCC and RSOC. This condition occurs every day, so the value (RM, FCC and RSOC) increases or decreases day by day.
problem2:There is no charge at night, so the discharge process only works at that time. But the remaining capacity value is not changed. The value did not change for several hours. This condition is not possible because the average current is 12ma / h . The value changes after five or six hours.
Why does this value(RM, FCC and RSOC) change? This is a big issue for my product.
My testing Process:
Test1: I only use the charging process, no change in value (FCC), then I use the discharge process, no change in value (FCC). No big difference, so everything is fine. The problem occurred when I tested it in real-time (simultaneous charging (solar panel) and discharge process). There is a big difference in FCC value from day by day.
Test2: Real-time Test(Simultaneous charging (solar panel) and discharge process). I tried to enable a smooth function and disabled the smooth function, but there were no changes. The same problems occur.
My Doubt: A smooth function that is enabled will calculate(Flt RemCap) the True RemCap value and then display the RM, is this correct?
A smooth function disabled, the True RemCap value Displays the RM directly, is this correct?
Below is the bq28z610 configuration file and the learning cycle log file attached.
Please solve my problem… Please answer my question.
2248.Bq28z610_v1.6_30_10_Full_23200.txt5875.Bq28z610_v1.6_04_11_Full_23200.txt
6406.Bq28z610_v1.6_23200_NCM.txt
* Texas Instruments Data Flash File * File created Wed Nov 04 08:45:26 2020 * * Device Number 2610 * Firmware Version 0.17 * Build Number 22 * Order Number 0 * * bqz Device Number 2610 * bqz Firmware Version 0.17 * bqz Build Number 22 * * Field Order: Class name, Subclass name, Parameter name, Parameter Value, Display Units "Calibration","Voltage","Cell Gain","12126","-" "Calibration","Voltage","Pack Gain","51754","-" "Calibration","Voltage","BAT Gain","49155","-" "Calibration","Current","CC Gain","10.004","mOhm" "Calibration","Current","Capacity Gain","10.003","mOhm" "Calibration","Current Offset","CC Offset","64","-" "Calibration","Current Offset","Coulomb Counter Offset Samples","64","-" "Calibration","Current Offset","Board Offset","0","-" "Calibration","Current Offset","CC Auto Config","07","hex" "Calibration","Current Offset","CC Auto Offset","0","-" "Calibration","Temperature","Internal Temp Offset","0","°C" "Calibration","Temperature","External1 Temp Offset","0","°C" 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Star Xu：
Hi
I will take a look at this more.
The gauge should change the FCC and RemCap as there is a charge and temperature/current changes this is normal. For problem 1, this seems like normal operation.
For problem 2 the gauge should be seeing the current and adjust according, your dsg current threshold and quit current may affect how the gauge reads the current, or if the gauge is in sleep mode.
,
pandian nano：
Hi Star Xu,
First of all, thank you for your reply,
Maybe I found the problem, but no solution was found
For example, the RM value is 22300mah while the True RemCap value is 22500mah. Now the discharge process has started. There is no change in the RM value, but the True RemCap value decreases. When the True RemCap value is below the RM value, the RM Value drops abruptly.
Why are the RM value and the True RemCap value not the same? How to Solve this Problem? Any Solution…
My Product average current is 12mA and My Gauge setting: DSG current threshold value is 20mA and quit current value is 1 mA. Is this correct or not? Need to make any changes to the setting?
Please see all gauge settings. Is that right or not? Please Reply…
Please solve my problem… Please answer my question.
,
Star Xu：
您好
I took a look at your logs, it looks like the OCVFR flag is set during the cycle, what chemistry ID are you using?
The RemCap has a filtered option, if the SMOOTH function is enabled the jumps should be mitigated. The two values of RemCap should not be the same because they are calculated with different smoothing factors.
If you want the gauge to be measuring the 12mA more often then it would be best to set it lower to 10mA.
,
pandian nano：
Hi Star Xu,
First of all, thank you for your reply,
I used 0238 Chemistry ID. I will set the DSG current threshold value below 10 mA.
My Design Capacity is 23200mAh(2s8p). Single Cell: Panasonic NCR 18650f(2900 mah) Battery.
,
pandian nano：
Hi Star Xu,
First of all, thank you for your reply,
For example, the RM value is 22300mah while the True RemCap value is 22500mah. Now the discharge process has started. There is no change in the RM value, but the True RemCap value decreases. This condition persists for a long time. When the True RemCap value is below the RM value, the RM Value drops abruptly.
Why this problem occurs? How to Solve this Problem? Any Solution…
Please solve my problem… Please answer my question…
,
Star Xu：
Hi
Do you have LOCK0 active? This may hold the RemCap SBS register. Also make sure the IT is enabled.Can you share the GPCCHEM report? Unless the ID was chosen because exact cell ID match.
It looks like from the learning cycle log you shared that the Trem RemCap went below 0 as well, was that the successful learning cycle log?
,
pandian nano：
Hello,
Sorry for the late reply,
Lock0 Is enabled.
The file(GPC Report) is attached here.
3288.GPC_Report-report.zip
