- Check Battery Voltage:
- Use a battery voltage tester or multimeter to measure the battery’s voltage.
- If the voltage is below a certain threshold (typically around 2.5 to 2.8 volts per cell), the battery may be in deep discharge state.
- Parallel Charge the Battery:
- Connect the dormant battery in parallel with another LiFePO4 battery of the same voltage.
- Wait for some time, then check the voltage of the dormant battery.
- Use an Adjustable Power Supply:
- If you have an adjustable power supply, set it to approximately 14 volts and connect it to the battery.
- This temporary charger will kickstart the battery, and then a regular charger can take over.
Keep in mind that the BMS trigger conditions for lithium batteries may vary across different brands and applications, and protection modes can be triggered for various reasons. However, using one of the above methods can safely and effectively wake up a dormant lithium battery.
