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Identifying the Cause of Rupture of Li‐Ion Batteries during Thermal Runaway
Advanced Science ( IF 14.3 ) Pub Date : 2017-10-27 , DOI: 10.1002/advs.201700369 Donal P Finegan 1 , Eric Darcy 2 , Matthew Keyser 3 , Bernhard Tjaden 1 , Thomas M M Heenan 1 , Rhodri Jervis 1 , Josh J Bailey 1 , Nghia T Vo 4 , Oxana V Magdysyuk 4 , Michael Drakopoulos 4 , Marco Di Michiel 5 , Alexander Rack 5 , Gareth Hinds 6 , Dan J L Brett 1 , Paul R Shearing 1
Advanced Science ( IF 14.3 ) Pub Date : 2017-10-27 , DOI: 10.1002/advs.201700369 Donal P Finegan 1 , Eric Darcy 2 , Matthew Keyser 3 , Bernhard Tjaden 1 , Thomas M M Heenan 1 , Rhodri Jervis 1 , Josh J Bailey 1 , Nghia T Vo 4 , Oxana V Magdysyuk 4 , Michael Drakopoulos 4 , Marco Di Michiel 5 , Alexander Rack 5 , Gareth Hinds 6 , Dan J L Brett 1 , Paul R Shearing 1
Affiliation
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As the energy density of lithium‐ion cells and batteries increases, controlling the outcomes of thermal runaway becomes more challenging. If the high rate of gas generation during thermal runaway is not adequately vented, commercial cell designs can rupture and explode, presenting serious safety concerns. Here, ultra‐high‐speed synchrotron X‐ray imaging is used at >20 000 frames per second to characterize the venting processes of six different 18650 cell designs undergoing thermal runaway. For the first time, the mechanisms that lead to the most catastrophic type of cell failure, rupture, and explosion are identified and elucidated in detail. The practical application of the technique is highlighted by evaluating a novel 18650 cell design with a second vent at the base, which is shown to avoid the critical stages that lead to rupture. The insights yielded in this study shed new light on battery failure and are expected to guide the development of safer commercial cell designs.
中文翻译：
确定热失控过程中锂离子电池破裂的原因
随着锂离子电池和电池组能量密度的增加，控制热失控的结果变得更具挑战性。如果热失控过程中产生的大量气体没有得到充分排出，商业电池设计可能会破裂和爆炸，从而带来严重的安全问题。这里，使用每秒 >20000 帧的超高速同步加速器 X 射线成像来表征六种不同 18650 电池设计经历热失控的排气过程。首次详细识别和阐明了导致最具灾难性的细胞衰竭、破裂和爆炸类型的机制。通过评估底部有第二个通风口的新型 18650 电池设计，突出了该技术的实际应用，该设计可以避免导致破裂的关键阶段。这项研究得出的见解为电池故障提供了新的见解，并有望指导更安全的商业电池设计的开发。
更新日期：2017-10-27
中文翻译：
确定热失控过程中锂离子电池破裂的原因
随着锂离子电池和电池组能量密度的增加，控制热失控的结果变得更具挑战性。如果热失控过程中产生的大量气体没有得到充分排出，商业电池设计可能会破裂和爆炸，从而带来严重的安全问题。这里，使用每秒 >20000 帧的超高速同步加速器 X 射线成像来表征六种不同 18650 电池设计经历热失控的排气过程。首次详细识别和阐明了导致最具灾难性的细胞衰竭、破裂和爆炸类型的机制。通过评估底部有第二个通风口的新型 18650 电池设计，突出了该技术的实际应用，该设计可以避免导致破裂的关键阶段。这项研究得出的见解为电池故障提供了新的见解，并有望指导更安全的商业电池设计的开发。
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