Solution for 18650 lithium battery not charging.
What's going on when I can't charge my 18650 lithium battery? What should we do if 18650 suddenly fails to charge? BATTSYS battery customization manufacturer, let's analyze together what's wrong with 18650 lithium batteries not charging? How should we handle it. Check if the 18650 lithium battery really cannot be charged.
1. Firstly, the issue with the charger has been ruled out. Use a multimeter to test if the output of the charger is around 4.2V, or compare it with a battery replacement to see if the charger is working properly. Alternatively, you can replace it with a charger;
2. Test the battery with a multimeter, assuming the voltage is zero and the resistance is zero, it may be that the battery is broken and must be purchased again;
3. If the battery still has a voltage of 0.2V or higher when tested with a multimeter, there is still hope that the battery can be activated and can be used normally. It is recommended for non professionals to have a professional technician check the activation;
4. There is a possibility of improper use of
18650 lithium-ion battery packs, which usually result in over discharge of the battery due to the failure of the internal insulation board over discharge protection, causing the battery to be in a false dead state;
5. The battery electrode is contaminated by electric shock, and the contact resistance is too high, resulting in excessive voltage drop. When charging, the host considers it fully charged and stops charging.
How to deal with lithium batteries that cannot be charged?
A minimum limit is set for the discharge of lithium batteries, and the irreversible reaction caused by overdischarging the battery, that is, our battery cannot be charged for too long, is the reason behind this. So, sometimes you can try using the "activation" method.
Generally, lithium batteries are charged using the "constant current constant voltage" method, which means charging with standard current for a period of time, and then charging with constant voltage when the battery voltage reaches the charging cut-off voltage. So you can use a DC power supply to charge for a period of time, and then use the original charger to charge after reaching the cut-off voltage. Although this method is sometimes feasible, it is not entirely impossible because excessive battery discharge has affected the performance of the battery. However, there are also cases where batteries that have been discharged for several years can be activated.
