The reason why the lithium battery cannot be charged

1.The charger parameters of the lithium battery do not match the charging parameters of the battery, resulting in lithium batteries cannot be charged

2. Failure of the charger of the lithium battery

3. The lithium battery itself and the related wiring harness failure

4. The lithium battery is over-discharged, the battery management system (BMS) is in the state of under-voltage protection, resulting in failure to charge

5. The battery management system (BMS) is in the state of low temperature protection, over-current protection, etc., resulting in the battery cannot be charged

6. Charging power failure

Five simple troubleshooting techniques

1. Rule out the charger itself and related wiring problems (check to be in a power-off state)

When we know that the lithium-ion battery can not be charged, the first thing we need to check is whether the charger is loose, charging battery specifications parameters and battery correspondence, etc., specific checks are as follows

1.1 Check the charger and the battery connection status, if the charger and the lithium-ion battery in the unconnected state will not charge the battery, you need to connect tight.

1.2 Check whether the charger’s parameter specifications and lithium batteries correspond to the lithium battery, lithium batteries have higher requirements for the charger, the use of ordinary chargers will be incompatible with the lithium-ion battery charger, resulting in charging cannot be replaced with the same parameter specifications of the charger.

1.3 Check whether the appearance of the charger has corrosion and other phenomena, the charger has corrosion may also lead to charging, need to replace the charger.

1.4 Check whether the charger line has broken circuit, damage phenomenon, there is damage will occur leakage or can not charge the fault, need to replace the line.

1.5 Check the charger port, the port has a foreign body can also lead to poor contact or can not charge, need to remove the foreign body.

2. Troubleshooting the battery itself and related wiring problems (check to pay attention to wearing protective equipment)

2.1 Check the appearance of the lithium battery whether there is a dent or protrusion phenomenon, which may affect the integrity of the shell, affecting the use of the need to consult a professional to see whether it is necessary to repair or replace.

2.2 Check the appearance of the battery whether there are cracks or Crack phenomenon, there are cracks or cracks will occur in the accident of leakage, sent to a professional repair electric repair.

2.3 Check the appearance of lithium batteries whether there are foreign objects or pollution, there are foreign objects or pollution will affect the performance of the battery, reduce the use of battery efficiency, and then remove the pollution.

2.4 Check whether the wire harness connection terminals of lithium-ion battery are connected reliably to improve the performance of the battery, if there is any problem, please contact professional maintenance personnel, please do not do it yourself.

2.5 Measure the battery voltage to see the battery voltage level, if the voltage is too low or dead state, you need to replace the battery.

3 Troubleshooting Battery Management System (BMS) undervoltage protection faults

Use a multimeter to measure the voltage at both ends of the battery, if it is measured 12V battery voltage is lower than 10V, the battery will appear under-voltage protection state, refuses to charge, if it is measured 24V battery voltage is lower than 20V, will appear under-voltage protection state, refuses to charge. (Note: Using a multimeter requires inserting the red lead into the Terminal labelled voltage V, inserting the black lead into the Terminal labelled COM, and selecting the direct current (DC) mode, usually with three dots below, and then selecting the measurement range). If the fault is confirmed to be that the Battery Management System (BMS) is in lowvoltage protection, the battery can be charged to 12V/24V or above using a charger with lithium battery activation.

4 Troubleshooting whether the battery management system (BMS) is in low temperature protection, over-current protection state, etc.

You can use the APP to check the information of the battery to confirm what protection state the battery has triggered, resulting in the inability to charge. Then follow the prompts to contact the professionals on what needs to be done to restore the normal state.

5 Ask for professional help directly

When encountering failures, if we do not know the relevant knowledge of lithium batteries, it is best to contact the maintenance personnel directly for repair, which can protect our lithium batteries and personal life and health safety to the greatest extent possible.

Conclusion

Lithium batteries cannot be charged mainly because of the charger, the battery itself, the battery management system failure, in the lithium battery repair, it is best to ask for professional help to avoid other problems. If the individual has some knowledge of lithium batteries, you can try a simple repair, do not dismantle the battery internal repair, and pay attention to safety precautions.