How to check the precautions of the UPS lithium-ion battery shield?

1. When measuring the voltage of each string, the meter pen is placed correctly, and it will be short-circuited and smoked. 2. When connecting the lithium-ion battery UPS shield board, you must first connect the cable and then plug the shield board. Plug the shield board properly and it may cause burning. The reason for the bad protection board UPS lithium-ion battery protection board 1. Overcharge protection and overcharge protection rules are restored when the lithium-ion battery UPS protection board is charged to make the voltage higher than the set value VC (4.25-4.35V, detailed overcharge protection voltage Depends on IC) After VD1 flips, Cout becomes low level, T1 ends, and charging is stopped. When the battery voltage drops to VCR (3.8-4.1V, the detailed overcharge protection recovery voltage depends on the IC), Cout becomes high, and T1 is turned on and the charge is inherited. VCR must be a fixed value less than VC to prevent frequent jumps. . 2. Over-discharge protection and over-discharge protection regulation. When the battery voltage drops to the set value VD (2.3-2.5V, the detailed over-charge protection voltage depends on the IC) due to discharge, VD2 reverses, and after a short time delay, Dout becomes low level, T2 ends, and the discharge is restrained. When the battery is charged, the internal OR gate is flipped and T2 is turned on again to prepare for the next discharge. 3. Over-current and short-circuit protection. When the current in the charging and discharging loop of the circuit is higher than the set value or is short-circuited, the short-circuit detection circuit acts to turn off the MOS tube and the current ends. Because UPS lithium-ion batteries contain highly active lithium metal materials and internal layout reasons, too much charging, too discharging, charging, discharging, and urban crushing of lithium-ion batteries, too high temperature, too low temperature, etc. Affect the lively environment and safety of lithium-ion batteries, so a special protective circuit is required to ensure the safety of the use of lithium-ion batteries and prevent the danger of battery fire or explosion. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: What are the important components of the material of the lithium-ion battery pack