Another way to fix Lithium-ion battery cells is by voltage applying method to activate the battery. This step involves providing a small amount of voltage to the battery using an adjustable power supply. This is similar to the ‘jump-starting’ capability of batteries.
For common issues with smart lithium batteries, we can typically diagnose the health of the battery by measuring the battery voltage, checking the wiring, and using Bluetooth to check the cell voltages, among other data. Please refer to the corresponding troubleshooting steps for specific problems.
The solution is the method described above: jump the sleeping LiFePO4 battery with another battery or power source of identical nominal voltage until it wakes up. At that point, it will start reading a voltage in its normal voltage range, and your lithium battery charger should start charging it like normal.
The slow charging method is by far the easiest and safest way to solve lithium battery problems. You have to use the same battery to apply only a low current for the slow charge. The slow charge method is a docile approach in which you gradually restore the battery’s functionality.
A LiFePO4 battery reading an abnormally low voltage — such as 5 volts or less — has probably entered sleep mode, also called low voltage disconnect (LVD), to protect the cells from overdischarge. In this quick tutorial, I’ll show you how to activate a sleeping LiFePO4 battery. The good news is a sleeping lithium battery isn’t dead. But act fast!
If the battery is in undervoltage protection mode, remove all connection wires from the battery and use a charger that matches the battery parameters and has lithium battery activation function. Activate and continuously charge the battery when the ambient temperature is above 41℉.