Tool/software:
Dear TI Engineer:
Attached is the ID data I provided. I used a LiFePo4 3 series battery cell, but the report provided by the tool is the ID of Limn2o4 battery cell, and there is a big difference between OCV and DOD. Can this be used?
Tool/software:
Dear TI Engineer:
Attached is the ID data I provided. I used a LiFePo4 3 series battery cell, but the report provided by the tool is the ID of Limn2o4 battery cell, and there is a big difference between OCV and DOD. Can this be used?
Hello,
I believe the charging of the battery was not done correctly. The max charging voltage is 3.65 V for one cell so for your battery pack this needs to charge up to 10.95 V. From there the voltage needs to hold steady at 10.95V and the taper should slowly taper down as the voltage holds the same. In the log I notice that the voltage is still increasing when the taper current is decreasing.
Regards,
Adrian
Hi Adrian:
I thought there was something wrong with my mailbox. I didn't receive the Email for three days,
Have received the report, Chemical ID 0457, Best chemical ID max. deviation, % : 9.18,
9.18 might be a bit big though,
Hello Qiqing,
Yes, 9.18% is really high. Sometimes for LFP batteries, they need to relax for 24 hours after charging.
Also, for the constant voltage charge we usually expect the current to slow decrease over time instead of a fast drop as seen in the current graph. Show look something similar to this:
Regards,
Adrian