What are the common problems in the use of 18650 lithium battery packs?

1. Battery depletion test If the lithium battery test is damaged, the battery voltage will not go up and the capacity will drop. We can directly measure it with a voltmeter when testing, if it is on both sides of the battery pack. If the voltage is lower than 2.7V, or the voltage is not tested at all, it indicates that it is damaged. If the battery voltage is lower than 2.7V, the repair we can do is to use a charger (4.2V) to charge the battery. After about 10 minutes, if there is a voltage increase, what we can do It is to continue to charge it, and after the battery is fully charged, the voltage is fully charged. If the full battery voltage is 4.2V, it means that the battery is normal. The most important thing is that it may consume too much power during the last use, causing the battery to be completely cut off. If the full-charge voltage is much lower than the 4.2V value, it means that our battery has been damaged. If the battery has been used for a long time, the battery can be replaced in time, otherwise there is no other way to repair it. 2. Repairing the battery pack 18650 lithium battery pack is easy to cause damage to one or two of the batteries, which will cause the entire battery pack to be unusable. What we need to do at this time is to have the voltage and capacity of each battery at both ends. Perform a test to see if there is a voltage or a severely low voltage, a relatively large access in terms of capacity, etc., after testing the problematic battery, we can replace it, but we should pay attention to it when replacing it. Be sure to replace a battery with a similar capacity and internal resistance. Generally speaking, after the replacement, the service life of the lithium battery pack is greatly improved. This is a more common method and a more cost-saving method. There are many precautions when using the 18650 lithium battery pack. What we should pay attention to is that it must be equipped with a protection board. At the same time, we must also pay attention to limiting the occurrence of overcharge, overdischarge, short circuit, etc., so that it can be done. To a large extent, the life of the lithium battery pack is improved. Lithium batteries must not be short-circuited. We must pay special attention when testing. When charging, we must pay attention not to exceed the rated voltage and current. In addition, we must also grasp the charging time, and we must not charge too long. time. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous article: What factors affect the service life of lithium batteries?