二次电池化成设备的防爆设计

Explosion-proof Design of Secondary Battery Formation Equipment

通过对二次电池化成设备的防爆设计,减少设备危险区域,提高二次电池化成工序的安全性能,促进电池检测设备达到全球化安全认证的标准。以爆炸性环境系列标准为依据,结合化成工艺时序表,进行了异常和极端异常情况的电解液挥发浓度计算,分析了点燃源风险和危险区域。对设备的排风风道和风量进行仿真优化分析,通过软件系统监控设备的排风、环境温度、烟雾、液位、真空压力、电池充放电电压、电流、温度等参数,并进行及时地反馈与控制。详细规范了防爆监控相关元器件的安装、接地、隔离、校准及点检的要求。通过系统与规范的防爆设计使设备的安全区增大,危险点减少,提高了设备的安全性能。采用烟雾发生器对样机设备排风风道进行测试,验证表明设备的排风排烟效果与仿真一致,库位内无危险气体残留死角存在,满足防爆设计要求。分析、优化和规范方法对电池检测设备的防爆设计具有现实的指导意义。

Through the explosion-proof design of the secondary battery formation equipment,the dangerous area of the equipment is reduced,the safety performance of the secondary battery formation process is improved and the battery inspection equipment is promoted to meet the standards of global safety certification.The calculation of electrolyte volatilization concentration for abnormal and extreme abnormal conditions is carried out according to the series of standards of explosive environment and combined with the process timing table.The risk of ignition sources and hazardous areas are analyzed.The exhaust duct and air volume of the equipment are simulated and optimized.The parameters of exhaust air,ambient temperature,smoke,liquid level,vacuum pressure,voltage,current and temperature of battery charge and discharge are timely monitored and controlled through the software system.The requirements for installation,grounding,isolation,calibration and inspection of explosion-proof monitoring components are specified in detail.The safety zone of the equipment is increased and the danger point is reduced through systematic explosion-proof design and specification.The safety performance of the equipment is improved.The smoke generator is used to test the exhaust duct of the prototype equipment to verify that there is no dead angle of dangerous gas residue in the storage location,which meets the explosion-proof design requirements.The verification shows that the exhaust effect of the equipment is consistent with the simulation.The methods of analysis,optimization and specification have practical guiding significance for the explosion-proof design of battery testing equipment.