Analysis of the charging and discharging principle of ternary lithium battery

1. Rechargeable ternary lithium battery The highest end-of-charge voltage of a single-cell lithium battery is 4.2V, which cannot be overcharged, otherwise the battery will be scrapped due to the loss of too much lithium ions in the positive electrode. When charging the lithium battery, a dedicated constant current and constant voltage charger should be used. First, charge with constant current until the voltage at both ends of the lithium battery is 4.2V, then switch to constant voltage charging mode; when the constant voltage charging current drops to 100mA, Charging should be stopped. The charging current (mA) can be 0.1 to 1.5 times the battery capacity, for example: a 1350mAh lithium battery, the charging current can be controlled between 135mA 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. 2. Discharge of ternary lithium battery Due to the internal structure of the lithium battery, all lithium ions cannot move to the positive electrode during discharge, and a part of lithium ions must be retained in the negative electrode to ensure that lithium ions can be inserted into the channel smoothly during the next charge. Otherwise, the battery life will be shortened. In order to ensure that some lithium ions remain in the graphite layer after discharge, it is necessary to strictly limit the minimum discharge termination voltage, which means that the lithium battery cannot be over-discharged. The discharge termination voltage of a single-cell lithium battery is usually 3.0V, and the minimum cannot be lower than 2.5V. The length of battery discharge time is related to battery capacity and discharge current. Battery discharge time (hours) u003d battery capacity/discharge current, and the lithium battery discharge current (mA) should not exceed 3 times the battery capacity, for example: a 1000mAh lithium battery, the discharge current should be strictly controlled within 3A, otherwise it will The battery is damaged. It is not difficult to see that during the charging and discharging process of lithium batteries, lithium ions are in a state of movement from positive to negative to positive. If we compare the lithium battery to a rocking chair, the two ends of the rocking chair are the two poles of the battery, and the lithium ion is like an excellent athlete running back and forth on both ends of the rocking chair. Therefore, the experts gave the lithium battery a lovely name, rocking chair battery. When choosing a ternary lithium battery manufacturer, special care must be taken to ensure the long-term life of the battery. Hunan Cuneng Electric Co., Ltd. adheres to the business philosophy of creating a brand with quality, creating a brand with innovation, and creating a brand with management. It adopts a reasonable processing management mechanism, a complete hardware infrastructure, a professional technical research and development team, and considerate after-sales service. Guarantee to provide customers with high-quality, high-standard and high-level products. 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: What are the basic reasons for the excessive internal resistance of lithium batteries?