What are the reasons why lithium battery packs cannot be charged?

It happens from time to time that the lithium battery pack cannot be charged. Even customers often ask if there is a problem with the quality of the lithium battery. We can't rule out some poor quality lithium batteries. Generally speaking, high-quality lithium-ion batteries will not encounter similar situations. Generally speaking, high-quality lithium batteries are unlikely to encounter similar situations. When encountering the problem of lithium battery packs that can not be charged, you can first troubleshoot the problem yourself, the first is the charger, the second is the charging line, and then the lithium battery protection board, and finally check the entire lithium battery pack.lithium ion battery assembly First of all, generally the first to consider the problem is the charger, if after replacing the charging power plug, is still not charging into the electricity, and then one by one to check whether there are other aspects of the problem.

So, today to popularize this knowledge, lithium batteries can not charge what is the reason? What are the methods of judgment? And under what circumstances will these problems occur?

1. Charger

Use a multimeter to measure the charger's no-load output operating voltage technology can be normal, the general charger will be printed and written on the OUTPUT output control voltage and current.battery cell machine If you have a load meter, use the load meter to simulate a battery to test the charger.

If you have more than one Li-ion battery pack and more than one charger, you can test charging interchangeably to determine if the charger is the problem.

2. Charging Circuit

The charging circuit includes the charging terminals, wires, and plugs. Check the charging wires for poor contact, false soldering, and peeling solder joints.prismatic cell assembly From the output of the charger to the access terminal of the controller, and then to the lithium battery pack, check whether the wires are connected correctly.

Method: Multimeter have connectivity or resistance gear, you can test the connectivity of the wires one by one.

3. Lithium battery protection board

The lithium battery protection board functions normally, but external abnormalities lead to lithium battery protection board cut off charging.

High temperature: charging environment temperature exceeds 45 ℃, the protection board in order to protect the lithium battery pack to cut off charging, can not charge. The temperature drops to below 45℃, charging is possible;

Low temperature: charging technology environment for the temperature below 0 ℃, the protection board will also cut off charging, to be the temperature continues to rise to about 5 ℃, lithium battery can be charged through normal use;

Charging current is too large: lithium battery protection board will be equipped with charging overcurrent protection, charging current must be less than the set value, otherwise it can not be charged;

Battery voltage exceeds the overvoltage protection value. The protection board recognizes that the battery pack is fully charged and cuts off charging.

Special settings, communication hibernation, or abnormal changes in the situation for hibernation. It needs to be activated by communication command to choose to continue charging.

Abnormal function of the lithium battery protection board, you need to disassemble the lithium battery pack and test the lithium battery protection board separately. There are many possibilities for the protection board to fail. The protection board function of the lithium battery is faulty and cannot be repaired, consider replacing the protection board directly.