Analysis of charging and discharging requirements for lithium batteries

1. Charging of lithium battery: According to the structural characteristics of lithium battery, the maximum charge termination voltage should be 4.2V, and it cannot be overcharged, otherwise the battery will be useless due to taking too much lithium ions from the positive electrode. The charging and discharging requirements are relatively high, and a dedicated constant current and constant voltage charger can be used for charging. Generally, the constant current charge to 4.2V/cell will be transferred to the constant voltage charge. When the constant voltage charge current drops to less than 100mA, the charge should be stopped. Charging current (mA) u003d 0.1 to 1.5 times the battery capacity (such as a 1350mAh battery, the charging current can be controlled between 135 and 2025mA). The normal charging current can be selected at about 0.5 times the battery capacity, and the charging time is about 2 to 3 hours. Origin: Big Bit Semiconductor Equipment Network 2. Discharge of lithium battery: Due to the internal structure of lithium battery, all lithium ions cannot move to the positive electrode during discharge. It is necessary to save a part of lithium ions in the negative electrode to ensure that the lithium ion will be charged next time Can be embedded in the channel dredgingly. Otherwise, the battery life will be shortened accordingly. In order to ensure that some lithium ions remain in the graphite layer after discharge, it is necessary to severely limit the minimum discharge suspension voltage, which means that the lithium battery cannot be over-discharged. The discharge termination voltage is generally 3.0V/cell, and the minimum should not be lower than 2.5V/cell. The length of the battery discharge time is related to the battery capacity and the size of the discharge current. Battery discharge time (hours) u003d battery capacity/discharge current. Lithium battery discharge current (mA) should not exceed 3 times the battery capacity. (Such as 1000mAH battery, the discharge current should be strictly controlled within 3A) Otherwise, the battery will be damaged. At present, the lithium battery packs sold on the market are equipped with matching charge and discharge maintenance boards. Just control the external charge and discharge current. 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: About the meaning of battery management system