How to repair mobile phone lithium-ion battery by yourself?

How to repair mobile phone lithium-ion battery Mobile phone users who use MT629 lithium-ion battery will find a problem: the positive and negative terminals of the battery have no voltage output. The results show that most of the failures are caused by the failure of the battery protection circuit. Many friends have reported that if the battery is just scrapped, there is no major problem, so it is a pity. So today the lithium-ion battery manufacturer will explain a way to repair the lithium-ion battery by yourself: the lithium-ion battery taken out of the battery is shown in the figure, and there is a protection circuit board on the top. The slightly elevated D+ and D- on the upper left of the device are the battery-powered + and-plates, respectively. The measurement results show that the D+ electrode is directly connected to the positive flat wire on the left side of the battery, and the D- electrode is connected to the protection circuit board. After the electrode is processed, it is output from the solder joint on the right side of the electrode plate and connected to the negative electrode of the battery through a wire. Repair your own lithium-ion battery by connecting point D directly to the cathode of the battery. Repair can be done by restoring the voltage on the D+ and D- electrodes. However, the following problems occurred during the implementation process: Since the solder joints under the d electrode plate have been sealed by some insulating materials during the battery production process, the solder wire has no exposed solder joints. After that, the patch shown in the attached figure, the solder joint of the capacitor and the D- very, very thin insulated wire, the point and the battery core solder on the right side of the cathode plate are directly jumper, well, the back wire is completed smoothly along the edge of the strip, and the lithium ion The battery is partially sealed with the battery case frame and the original paper. Install it on the universal charger for testing. The test light is on, indicating that the voltage on the D+ and D electrodes has recovered. After charging, the charger LED is displayed full, removed and installed on the mobile phone for testing, and it is found that there is no difference with the new battery. Although the battery has lost its self-protection function, it can only be used when charging the battery, and the existing chargers have the performance of constant voltage and constant current, so do not use this method to repair the battery. There are concerns and use it with confidence. . In fact, as long as we understand the principle of lithium-ion batteries, many times we can repair it ourselves! Hope to provide help for users! Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete the previous one. Article: Precautions for the operation of lithium-ion batteries and polymer battery cells