Other Parts Discussed in Thread: BQSTUDIO, GPCCHEM
HI,
Here is the "log" that was requestedTCU_7_020424.log
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HI,
Here is the "log" that was requestedTCU_7_020424.log
Hi,
Can you share your .srec file and a BQstudio log file of the SOC drop.
Regards,
Evan"
Hi,
Thank you for the log file.
As previously discussed in the other e2e thread, the DOD % error from the GPCCHEM tool will result in SOC error and/or jumps.
Your current appears to be pulsing throughout discharge. This document is relevant for any pulse load application - Impedance Track Gauge Configuration For Dynamic Loads (EPOS)
Can you share your .gg file if possible.
Do you have both the LFP relax bit and DoDWT bit enabled? I recommend enabling both.
What is your load select and load mode? I recommend Mode:1 Select:1
See if this helps reduce the SOC inaccuracy you are seeing.
Regards,
Evan
Hi,
The configuration of these parameters is as follows:
- Load mode "0".
- Load select "0".
- DoDWT "1".
- LFP relax "1".
regards,
Hi,
Please follow my previous recommendations and see if this reduces the SOC jump.
Please provide a new log file if you still are having issues.
Regards,
Evan
Hi,
After looking at your log file, it appears you discharge at a fairly constant rate. I suggest changing Load Mode to 0 and load select to 6 and use the average discharge current.
Regards,
Evan
Hi,
But normally, they are not constant discharge. We have motor consumption of 2A every so often.
Hi,
Understood, please test with a load that is expected for your application. We are tuning the load mode and select for an expected load.
Your load and battery chemistry are difficult for a top of stack gauge to gauge, with that being said in the most recent log file BAT_EXPORT the SOC looks reasonably accurate. What type of accuracy are you expecting? What portion of the graph is concerning?
Regards,
Evan
Hi,
In this last example the operation is correct. I want to avoid SOC jumps like the ones in the image. I don't want a SOC jump after doing an "FC" and it relax.
I can't set this setting, because my discharge is not constant. With our mode of operation, the "LOAD SELECT" has to be "0", because we prefer to work with the average discharge current of the previous cycle.
Hi,
Understood, please allow me sometime to align with my team on your issue.
Regards,
Evan
Hello,
Evan is currently out of office, please expect a delayed response.
Regards,
Jonny.
Hi,
After reviewing your data, I suggest using the rb low tool to adjust the resistance tables in the gauge for low temperature applications.
GPCRB Application software & framework | TI.com
I also recommend enabling smoothing if not already enabled.
Regards,
Evan
Hi,
The last log file sent on 4/12 shows the battery cell temperature decreasing into the negative deg. C range. If you are saying this is inaccurate you may need to calibrate your thermistor. Temperature is an important aspect of the impedance Track gauging algorithm.
Please proceed with these settings.
Regards,
Evan
HI,
But I already used that application (GPCRB Application software & framework | TI.com) to get the GoldenImage.
I don't understand how I can have SOC jumps at rest after charging to 100%. I want to avoid SOC jumps
Regars
Hi,
Can you share your data input and the report received from the tool?
Regards,
Evan