What are the management systems and working principles of ladder lithium iron phosphate batteries

The working principle of the ladder lithium iron phosphate battery When the battery is charged, Li+ migrates from the lithium iron phosphate material to the crystal surface, and is removed from the positive plate material. Under the use of electric field force, it enters the electrolyte, passes through the diaphragm, and then passes through the electrolyte. Migrate to the surface of the negative electrode graphite crystal, and then embedded in the negative electrode layered graphite material. At the same time, the electrons flow through the aluminum foil of the positive electrode, flow through the tabs, battery poles, load, negative poles, and negative tabs to the copper foil electrode of the negative pole, and then flow to the graphite negative pole through the conductor to balance the charge. When the battery is discharged, Li+ is deintercalated from the layered graphite crystal, enters the electrolyte, passes through the diaphragm, and then migrates to the surface of the lithium iron phosphate crystal through the electrolyte, and then re-embedded in the lithium iron phosphate material. At the same time, electrons flow through the conductor to the copper foil electrode of the negative electrode, through the tab, battery negative pole, load, positive pole, and positive pole to the aluminum foil electrode of the battery positive pole, and then flow to the lithium iron phosphate positive electrode through the conductor. To balance the charge. Echelon lithium iron phosphate battery management system The battery management system is mainly used to manage the charging and discharging processes of the battery, improve the service life of the battery, and provide users with relevant information. The battery management system BMS is composed of monitoring, protection circuits, electrical, communication interfaces, thermal management devices, etc., and is the core component of battery protection and management. It not only ensures the safe and reliable use of the battery, but also fully utilizes the performance and extension of the battery. Service life, as a backup energy for communication, the management system plays an important role as a bridge between the switching power supply and the battery. The requirements of the battery management system must meet the requirements of the communication power supply system, so the safety management mode of the battery management system is crucial to the safety of the battery. The battery management system includes a data acquisition unit, a calculation and control unit, a balance unit, a control execution unit, and a communication unit. Constant current-constant voltage charging stage: charge limit voltage control (battery unit 3.7V, battery pack 59.2V); intermittent recharge stage: open circuit and stand still, the capacity is reduced by X%SOC (where X is between 75 and 95 When the battery pack enters the supplementary charging state again, the supplementary charging method also follows the constant current-constant voltage charging method; in the open-circuit static state, if the AC power fails, the BMS should be able to control the battery pack to enter the discharge state without delay. That is, T1 and T3 are the charging process, T1 is the constant current-constant voltage charging phase, T3 is the intermittent supplementary charging phase; T2 is the open-circuit static phase of the battery pack; T4 is the battery pack discharging process. 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: Who is more suitable for electric vehicles?