Lithium-ion battery protection board passive equalization and active equalization

The balance function of lithium-ion battery protection board Hefei lithium-ion battery protection panel commonly used equalization charging technology includes constant shunt resistance equalization charging, switch parallel resistance equalization charging, average battery voltage equalization charging, switched capacitor equalization charging, and buck converter equalization charging, Inductance equalization charging, etc. When lithium-ion batteries are charged in series, each battery must be evenly charged, otherwise the performance and life of the entire battery will be affected during use. However, the existing single-chip lithium-ion battery protection chip does not have a balance charge control function, and the multi-chip lithium-ion battery protection chip balance charge control function requires an external CPU. Through serial communication with the protection chip (such as the I2C bus), the complexity and design difficulty of the protection circuit are added, the efficiency and reliability of the system are reduced, and the power consumption is increased. According to the requirements of the application, the balance principle of lithium-ion battery protection board can realize the protection of power lithium-ion battery pack and balance the structure and voltage level after changing the protection chip mode, serial number, power switching device and energy consumption component circuit. As a battery with a large energy reserve, lithium-ion batteries are widely used in computer rooms, communication base stations, data centers and other fields. The lithium-ion battery protection board has the function of protecting the battery and preventing overcharging. Lithium-ion battery protection board passive balance and active balance: The battery itself has available capacity, but due to the imbalance between the batteries and the limitation of the safe voltage setting to protect the battery, the battery system cannot continue to play its intended purpose. In addition, the battery life of a car is shorter than that of the car itself. Even if the car has not reached the end of its life, it must meet the power performance and replace the battery. But the cost of replacing batteries is so high that electric vehicles are largely restricted. The important cause of imbalance is temperature. Generally speaking, when the ambient temperature is 10°C higher than the optimal temperature, the life of the lithium-ion battery will be shortened by half. Because the number of series connection of the vehicle battery system is very large, generally between 88-100 series, and the capacity is generally between 20-60kWh, because the loading position of each battery is different, there will be a temperature difference. Even in the same battery box, due to the different heating positions and batteries, there will be a temperature difference, and this temperature difference will have a significant negative impact on the battery life, making the battery unbalanced, reducing the battery's cruising range, and shortening the cycle life. Due to these problems, the capacity of the entire battery system cannot be fully utilized, leading to the loss of the battery system, and reducing the loss of the system will greatly extend the life of the battery system. 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 article: What is the reason why lithium ion batteries will become mainstream and popular?