Two requirements for charging and discharging lithium batteries

Lithium battery charging and discharging requirements; 1. Lithium battery charging: According to the structure and characteristics of the lithium battery, the maximum continuous charging voltage is 4.2v, and it cannot be overcharged. Otherwise, lithium ions will be carried away too much in the positive electrode, and the battery will become useless. The charging and discharging requirements are relatively high, and a special constant current and constant voltage charger can be used for charging. Constant current charging generally adopts the constant voltage charging method after 4.2v/node charging. When the constant voltage charging current drops to less than 100mA, continue charging. Charging current (mA)u003d0.1~1.5 times the battery capacity (such as 1350mAh battery, the charging current can be controlled between 135~2025mA). The normal charging current can be about 0.5 times the battery capacity, and the charging time is about 2 to 3 hours. 2. Lithium battery discharge: Due to the internal structure of lithium batteries, lithium ions cannot move to the positive electrode discharge period, so it is necessary to keep lithium ions in a part of the negative electrode to ensure smooth insertion of lithium ion channels in the future. 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 strictly unload the minimum voltage that the discharge lasts, that is, the lithium battery cannot be over-discharged. The continuous discharge voltage is generally 3.0V/cell, and the minimum should not be less than 2.5V/cell. The battery discharge time is related to the battery capacity and 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. Lithium battery packs on the market now have matching charge and discharge maintenance boards. Just control the external charge and discharge current. 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 article: Why does the mobile phone battery explode? How to prevent it?