煤矿井下锂离子蓄电池热失控燃爆风险防控技术研究现状与挑战

Research status & challenges on prevention and control technology for thermal runaway combustion-explosion of lithium-ion battery in coal mines

  • 摘要: 在“双碳”背景下,锂离子储能电池、信息技术与煤矿深度融合的能源电子产业蓬勃发展,2024年前4个自然月,MA“锂”相关认证同比增长94%,煤矿井下锂离子蓄电池应用新业态孕育而生。新业态为煤炭绿色转型带来了发展机遇的同时,新风险也随之而来。锂离子蓄电池作为一种高能物体,本质上仍存在火灾或爆炸风险,一旦锂离子蓄电池在煤矿井下受限空间发生热失控,灾害后果不堪设想。为保障煤矿井下锂离子蓄电池安全运行,电池被放置在1~2 cm厚高强度钢板制成的防爆外壳内部,且设置了较大的冗余空间容纳热失控产生的气体,但由于设备的续航能力受限,锂离子蓄电池应用于大型辅助运输和开采设备进程受到影响。为降低煤矿井下锂离子蓄电池热失控风险,提高设备续航能力,推动煤矿井下锂离子蓄电池向纵深发展,研究聚焦煤矿井下大容量锂离子蓄电池安全问题,剖析了煤矿井下锂离子蓄电池热失控机理、安全评价与管理、监测预警、电源结构与功能设计、充电与换电安全和应急处置6方面的研究现状及不足,提出了包括典型场景下锂离子蓄电池燃爆与煤矿灾害之间的耦合孕灾机制、适用于煤矿井下的高安全性锂离子蓄电池、煤矿井下锂离子蓄电池热失控超前预警技术与监控策略、煤矿井下锂离子蓄电池电源高强度阻燃隔爆与轻量化设计、煤矿井下锂离子蓄电池智能化安全充电与换电技术装备和煤矿井下锂离子蓄电池热失控燃爆灾害快速控制技术等6项亟需解决的关键问题,期望为解决新业态下的锂离子蓄电池安全问题和续航能力不足问题提供指引。

     

    Abstract: With the continuous promotion of the “carbon neutral& carbon peak” process, the energy electronics industry that deeply integrates lithium-ion energy storage batteries, information technology and coal mines is flourishing. A new industry for the application of lithium-ion batteries in coal mines has emerged. In the first four natural months of 2024, MA certification for “lithium” increased by 94% year-on-year. While the new industry has brought development opportunities for the green transformation of coal mines, new risks have also arisen. As a high-energy object, lithium-ion batteries still inherently carry the risk of fire or explosion. Once the battery experiences thermal runaway in in the confined space of coal mines, the consequences of the disaster are unimaginable. Besides, to ensure the safe of lithium-ion batteries in coal mines, the batteries are placed inside explosion-proof housings made of high-strength steel plates of 1−2 cm thick with plenty of redundant space, which limits the endurance of the equipment and the process of applying lithium-ion batteries to large-scale auxiliary transport and mining equipment. In order to reduce the risk of thermal runaway of lithium-ion batteries in coal mines, improve equipment endurance, and promote the development of lithium-ion batteries in coal mines in depth, this study focus on the safety problem of large capacity lithium-ion batteries in coal mines, analyzing the research status and shortcomings in six aspects: thermal runaway mechanism, safety evaluation and management, monitoring and early warning, power structure and function design, charging and swapping safety and emergency response. Besides, six key issues that urgently need to be addressed in coal mines for the safety of lithium-ion batteries are proposed, including the coupled disaster triggering mechanism between lithium-ion battery combustion and explosion and common coal mine disasters in typical scenarios, the development of high safety lithium-ion batteries in coal mines, the thermal runaway advanced warning technology and monitoring strategy of lithium-ion battery, the high strength, flame retardant, explosion-proof and lightweight design of lithium-ion power, the intelligent and safe of charging & switching technology and equipment, and rapid control technology for thermal runaway explosion disasters. These are expected to provide guidelines for solving the safety problem and insufficient endurance problem of lithium-ion batteries in the new industry.

     

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