Lithium sulfur battery nail penetration test under load
Lithium sulfur battery nail penetration test under load
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DOI：
10.1016/j.est.2015.05.007
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发表时间：
2015-08
影响因子：
9.4
通讯作者：
I. Hunt;Yatish Patel;M. Szczygielski;Lukasz Kabacik;G. Offer
中科院分区：
文献类型：
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作者：
I. Hunt;Yatish Patel;M. Szczygielski;Lukasz Kabacik;G. Offer
锂电池存在许多安全问题，这限制了它们在某些应用中的使用。电池行业使用钉子穿透测试来比较金属物体穿过电池时不同电池的安全性，这种金属物体会物理破坏容器并局部损坏内部结构。对于大多数锂化学品，如混合金属氧化物或磷酸铁锂阴极，这些测试会导致快速和危险的故障。锂硫是重要的下一代超高能量密度电池化学物质，也具有固有的安全性。报告了对16 Ah锂硫电池进行钉子穿透测试的结果，显示了在10分钟的穿透过程中，它们如何在不到10°C的温度下升温，然后在取出钉子后迅速冷却。负载下的钉子穿透测试结果也首次被报道，显示了电池如何能够继续向外部负载提供1.6 a （C/10）的电流，而电压仅下降1%。该结果对于需要超高能量密度、提高安全性和在损坏后短时间内持续供电的应用，特别是军事、航空、便携式电子和汽车工业，应该是感兴趣的。
Lithium batteries suffer from a number of safety concerns which limits their use in some applications. Nail penetration tests are used by the battery industry to compare the safety of different batteries during an incursion by a metallic object through a battery that physically violates the containment and locally damages the internal structure. For most lithium chemistries, such as mixed metal oxide or lithium iron phosphate cathodes, these tests result in rapid and dangerous failure. Lithium sulfur is an important next generation ultra-high energy density battery chemistry which is also inherently safer. Results are reported for nail penetration tests on 16 Ah lithium sulfur batteries showing how they heat up by less than 10 °C during a 10 min penetration and then cool down rapidly after removal of the nail. Results of a nail penetration test under load are also reported for the first time, showing how the battery was capable of continuing to provide 1.6 A (C/10) of current to an external load, with only a 1% drop in voltage. The results should be of interest for applications requiring ultra-high energy densities, improved safety, and continuous provision of power for a short period after damage, particularly military, aviation, portable electronics and automotive industries.