What is the balancing technology of lithium batteries

What is the equalization technology of lithium batteries? In order to solve the problem of battery consistency, the industry has widely used equalization technology. At present, the industry has divided the equalization technology into passive equilibrium method, active equilibrium method, and internal equilibrium method. 1. Commonly used equalization methods are active equalization and passive equalization based on power circuits. In the passive equalization method, a single rechargeable battery with a high working voltage is charged and discharged according to the power circuit connected to an input resistance. According to more power circuits, it can be determined whether its working voltage is the same as the working voltage of other single rechargeable batteries. When a rechargeable battery is terminated, the disadvantages of the passive equalization method are the energy consumption of a single rechargeable battery, the occurrence of heat, and the long equalization time. The characteristic of the passive equalization method is: when the equalization current is less than small, the component cost is relatively low, but there are two problems: 1. The energy consumption of the resistance is charging and discharging, and the energy consumption is the current heat; 2. The charging and discharging resistance is unlikely The selection is small, the battery is charged and discharged, and the battery's operating voltage is usually higher according to the characteristics of the rechargeable battery. When static data is equalized, the discharge is only a small rechargeable battery. 2. The active equalization method transfers the kinetic energy of the rechargeable battery to the battery with a lower working voltage according to the consumption of the resistance when the battery is recharged. The key feature of the active equalization method is the DC//cd/cd dual digital power amplifier equalization power supply circuit. In the whole process, high efficiency, battery charging and discharging, and static data equalization, large equalization current and fast balance rate, but there are two problems: 1. The technology is complicated, the cost is increased, and it is difficult to complete; 3. The internal equalization method uses bms during the entire charging process, adjusts and runs the battery charging operating voltage optimization algorithm according to the current, so that the charging capacity of each single rechargeable battery in the lithium battery is basically the same. The internal equalization technology is simple, there is no kinetic energy damage, no additional battery charging process, no harm to the number of battery cycles, no new hardware configuration machine equipment, but if the battery charging phase distance is large, it takes a long time to equalize. The inconsistency of rechargeable batteries comes from the resistance, volume and transaction volume of the battery, and the traditional consistency evaluation method and equalization method as a safeguard measure cannot reasonably increase the energy capacity of the lithium battery, so it cannot improve the consistency of the lithium battery. The negative impact of the problem on the use of the combined rechargeable battery. Since DC internal resistance, electrode working voltage and large energy capacity are important parameters of rechargeable batteries, the basis of the charging process will not change in one or more cycles. After scientific research, we use soc as the balance reference object, determine the relevance of the balance target, and use the balance time flexibly to reduce the volume of the balance current. From the perspective of the intelligent management system for rechargeable batteries, the critical parameters of a single rechargeable battery are detected during the entire use of the lithium battery, especially in the case of dynamic and static data. 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: Key technical standards for lithium iron phosphate power lithium battery packs for communications