Tool/software:
We sloved 'SOC jump down issue at -20°C' by changing register.
Previously we proceeded getting chemistry ID, Cycle learning, Resistance Temperature Compensation Optimizer in order.
But SOC jump down issue was not solved. So we applied hysterisis method by changing register like below
<Register Action>
|
Action No. |
Address |
NAME |
Below -5°C |
0°C or more |
|
1 |
0x45BE |
Term Voltage |
3400mV -> 2800mV |
2800mV -> 3400mV |
|
2 |
0x45C3 |
Term Min Cell V |
3000mV -> 3100mV |
3100mV -> 3000mV |
|
3 |
0x464D |
IT Gauging Configuration |
16ce |
14ce |
Our system cut-off voltage is 3400mV but our cell is dropped to 3300mV when loading 700mA at -20°C. So SOC was dropped to 0% and powered off as soon as loading current in 1minute.
But when I set Term Voltage enabled, set this to 2800mV, SOC dropped issue was disappeard and possible to load 700mA continuously about 3 hours.
However I wonder whether it is the right workaround that I applied
If you need logs or settings, ask me anything
Thanks
