矿用防爆柴油机车锂离子蓄电池启动电源系统设计

Design of start-up power supply system of lithium-ion battery of mine-used explosion-proof diesel locomotive

针对GB 3836.2—2010规定隔爆壳内不能使用有可燃混合物析出的蓄电池的要求,将多个单体锂离子蓄电池串联成组,设计了一套矿用防爆柴油机车锂离子蓄电池启动电源系统;分析了系统的设计要求和结构,详细介绍了系统中电池管理功能的实现。电池管理系统采用LTC6803配合单片机实现对电池组的单体电池电压检测和均衡控制,利用DS18B20温度传感器采集单体电池温度,运用双电流霍尔传感器采集电池组启动电流和充电电流。测试结果表明,该系统运行稳定,电压和电流测量误差远小于煤矿安全标准的规定值。

In view of requirement of GB 3836.2-2010 that battery with precipitated combustible mixture cannot be used in flameproof shell,a start-up power supply system of lithium-ion battery of mine-used explosion-proof diesel locomotive was designed with serial lithium-ion batteries.Design requirements and structure of the system were analyzed,and design of battery management unit of the system was introduced in details.The battery management unit combines LTC6803 with microcontroller to realize voltage detection and equalization control of single battery,uses DS18B20 temperature sensor to collect temperature of single battery and employs double current hall sensors to collect start-up current and charging current of the batteries.The test results show that the system runs stably,and measuring errors of voltage and current are far less than specified value of coal mine safety standards.