Project description: Battery Management System (BMS) The battery management system consists of three-level architecture, namely Module Management Unit (BCMS), Battery Cluster Management Unit (BMMS), and Battery Domain Management Unit

(BAMS) Level 3. The main functions include: battery system status monitoring function: real-time measurement of single battery voltage, temperature, total battery pack voltage, total current, etc.; estimation of state of charge SOC. Communication: BMS has CAN and RS485 communication interfaces. Through integration or expansion, BMS's external communication functions are realized and information interaction with the outside world is completed. Local operating status display and monitoring: The battery management system can locally display and monitor various operating conditions of the battery system, such as cell voltage, temperature, current, system status, alarm and protection information. Conducted interference limit: Battery management system voltage collection, communication interface and power supply interface meet the requirements of GB/T 17626.4-2008 Level 4; after the test,

There is no obvious deformation, smoke or explosion in appearance, and it can work normally.

Main features: Self-diagnosis function: The battery management system has self-diagnosis function. After the system is powered on, it self-diagnoses hardware such as voltage, temperature, communication, clock, memory, and internal communication, and reports it to the monitoring system. Battery fault analysis and online alarm: During system operation, when the battery system encounters overvoltage, undervoltage, overcurrent, high temperature, low temperature, insulation, communication abnormality, etc., BMS can diagnose the fault state, give alarm signals and fault location information, and upload alarm information.

Technical level: Single batteries are the core components of the battery system, and their performance directly determines the technical performance of the battery pack. Through technical evaluation of chemical system, monomer capacity, safety, difficulty of combination, discharge power and other aspects, and combined with the use environment of this project, Ningde Times 3.22V 271Ah lithium iron phosphate system lithium-ion battery was selected.

Application prospect: It can be used for military computers or other military equipment to monitor the operating status of the battery system. Its main characteristics are metal shell, fast heat dissipation, high discharge rate and good safety; it also has human-computer interaction function, and can display the interface in real time. Refresh display data; support large-scale automated production methods, with good unit consistency and high quality reliability