The harsh and confined environment of underground coal mines makes lithium-ion batteries vulnerable to external physical shocks or damage,potentially leading to safety incidents.This study investigated a 100 A·h lithium manganese oxide ion battery designed for mining applications,employing puncture,high-temperature,and humidity tests to evaluate its safety performance.The puncture test simulated mechanical shocks typical in coal mine environments by penetrating the battery with a sharp object and observing its response under extreme conditions.A furnace and humidity-controlled environment chamber were also utilized to replicate the high-temperature and humid conditions encountered in coal mines,assessing the battery's safety and reliability post-puncture.The results revealed the following:① After puncture by a tungsten needle,the battery exhibited surface deformation and cracking,but no electrolyte leakage,smoke,fire,or explosion occurred,with no gas generation inside.Although the temperature of the punctured battery rose significantly,it remained within a safe range without igniting or exploding,indicating a certain level of thermal stability suitable for coal mine applications.② The punctured battery expanded notably when heated in the furnace,accompanied by gas leakage;however,no explosion or combustion took place,suggesting thermal stability under specific conditions.③ In a humid environment,the punctured battery produced gas,leading to increased internal pressure.The combination of puncture and humidity raised the battery's temperature,but the moisture acted as a cooling agent,resulting in a slower temperature increase compared to high-temperature conditions,without triggering explosion or combustion.This indicated that the battery maintained thermal stability in humid environments and did not exhibit thermal runaway.
关键词
矿用锰酸锂离子蓄电池/电池安全性试验/机械冲击/针刺试验/高温试验/潮湿试验
Key words
lithium manganese oxide ion battery for mining/battery safety testing/mechanical shock/puncture testing/high-temperature testing/humidity testing
维普
万方数据