What are the basics of repairing lithium-ion battery shields?

Maintenance essentials for lithium-ion battery shields 1. Poor voltage may be abnormal. No voltage may be very low. First, we should adjust the multimeter to the DC 20V position, and then use the red meter pen to hit the positive electrode of the lithium-ion battery cell. The color meter pen hits the negative pole of the battery. If the multimeter shows that there is no voltage, the voltage may be very low, then the battery is damaged. Pay attention to check whether the positive and negative poles of the shield are reversely connected. If they are reversed, the charger is equivalent to forced over-discharge when charging the lithium-ion battery. 2. There is no over-current protection. First, check whether the circuit of the over-current detection pin is defective. If so, change the protection IC. 3. If there is no resistance or the resistance is too large, it is necessary to find the reason from the identification circuit of the resistance pad to check whether the identification resistance is disconnected, whether the resistance is incorrectly attached, whether there is a short circuit or an open circuit, etc. 4. No charging. First of all, we need to use the switch of the multimeter to select the DC 20v gear, and then use the red test pen to fight the positive electrode of the battery cell may be the shielding plate. If the multimeter displays the output voltage, we must follow the following environment to explain : Is there an output voltage? Whether the cell voltage belongs to the normal environment. 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: How to activate the lithium-ion battery shield?