在科学技术发展突飞猛进的今天，随着社会发展的信息化、现代化，煤矿发展的智能化、安全化，人们对供电的要求越来越高。电力故障具有突发性，而矿用局扇风机在矿井下具有十分重要的意义，一旦断电将会带来不可估量的后果。因此，高性能矿用局扇EPS作为后备电源，为矿业安全提供保障显得尤为重要。 论文首先通过对比EPS、UPS和柴油发电机组优缺点，得出研究高性能EPS在矿用局扇中应用的重要性。文中给出了矿用局扇EPS的工作原理和系统的一些技术指标，根据要求设计系统结构图，选择蓄电池种类并计算其安时数等参数。其次，论文详细的阐述了单元充电器的设计，通过介绍磷酸亚铁锂充电原理和特性，根据常用的充电方法和实际需要选择了较为科学的充电方法，确定了使用BUCK降压电路作为充电电路，实现先以恒流3A，后以恒压14.4V的两段式充电方式，在提高了充电效率的同时，延长了电池的使用寿命。论文研究重点为单元蓄电池组管理系统的设计，通过比较现有均衡电路的优缺点，提出了一种以4节串联电池为均衡单元的非能量耗散型均衡管理方案，并对辅助电路进行分析与设计，通过软件编程最终实现电池电量的均衡，达到了均衡平均电流为1A左右，不仅增加了蓄电池组使用的安全性，也延长了电池的使用寿命。 文中详细的阐述了逆变系统的设计，通过逆变系统原理框图确定主电路拓扑，并详细的介绍了硬件电路的设计，包括主电路功率开关器件的选型及其他辅助电路的设计。逆变技术一改以往的模拟电路生成SPWM波，采用了软件生成SPWM波形数字控制技术，简化了电路，降低了成本，更利于实现数字化控制。系统人机界面通过Modbus协议进行通信，并增加了一些辅助功能，用于显示充电均衡和应急逆变的状态参数。 在对各模块的设计与分析的基础上，完成硬件电路的搭建与调试，采集实验波形并分析。实验验证证明整个系统的设计符合设计要求，完成了预期的目标，并总结了课题研究过程中存在一些不足之处，并提出改善的措施。

Nowadays, in the rapid development of science and technology, the informatization and modernization of our society, the intelligence and security of mine development, make people higher request for the power supply. Power failure is uncertain, and mine local fan is of great significance under the mine, once electricity interruption will be incalculable consequences. Therefore, high performance emergency power supply as backup power supply, will be mining safety guarantee. After comparing the advantages and disadvantages of the EPS, UPS and diesel generator set, it is concluded that it is important for the high performance EPS application in the mine local fan. Then the article introduces the working principle and some technical indicators of the mine local fan EPS, according to the requirement, the article designs the system structure, selects the battery type and calculate the parameters and so on. The article details the design of the charger unit. According to charging principle and characteristics of lithium iron phosphate batteries, the article chooses a scientific charging method, using BUCK circuit as the charging circuit. It achieves two stages of constant current of 3A and constant voltage of 14.4V, which improve the charging efficiency and prolong the service life of the battery. The article introduces the design of the battery management system unit. Combined with the advantages and disadvantages of existing equalization circuit, the article proposes 4 series batteries as a unit with the dissipation energy balance management scheme. The balance of battery is realized by software programming. It reaches about average current of 1A. Finally, it not only increases the safety of battery, but also prolongs the service life of the battery. The article details the design of the inverter system. According to principle diagram of the inverter system, the article determines the main circuit topology and introduced the design of the hardware circuit. It includes the power switch device selection in the main circuit and the design of other auxiliary circuit. Inverter technology changes the traditional analog circuit to software to generate SPWM waveform digital control technology. It simplifies the circuit, reduces the cost, and is more conducive to achieve digital control. Human-machine interface is according the Modbus protocol to communicate, it adds some auxiliary functions, used to display charge equalization and emergency state parameters of the inverter. Finally, based on the analysis and the design of each module, the article completes the construction of the hardware circuit and debugging, collects the experimental waveform. It shows that the design of the whole system is in conformity with the design requirements and completes the expected goal. The article summarizes some disadvantages of the research in the process, and puts forward some improves measures.