The design and impact of in-situ and operando thermal sensing for smart energy storage
The design and impact of in-situ and operando thermal sensing for smart energy storage
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DOI：
10.1016/j.est.2019.01.026
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发表时间：
2019-04-01
影响因子：
9.4
通讯作者：
Bhagat, Rohit
中科院分区：
文献类型：
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作者：
Fleming, Joe;Amietszajew, Tazdin;Bhagat, Rohit
锂离子电池越来越成为电池供电系统的首选技术。当前的电池性能监测依赖于对全电池电压和零星表面温度的测量，不能提供关于真实内部电池状态的可靠信息。在这里，我们通过嵌入灵活的分布式传感器进行长期原位和操作热力学数据收集，将现成的细胞转化为智能系统来解决这个问题。我们的方法可以监控电池的真实状态，不会影响其性能。特别是，我们的研究结果表明，这种前所未有的方法可用于优化锂离子电池的性能并绘制其安全极限。我们发现，电池芯温度是一致的，显着高于表面温度，并揭示了在快速放电测试过程中的安全限制的突破。我们还展示了一个电流大大高于制造商的规格，使充电时间显着减少，而不影响电池的热稳定性的应用。因此，这项工作的电池仪器的方法有可能促进电池技术的重大进步。
Lithium-ion is increasingly the technology of choice for battery-powered systems. Current cell performance monitoring, which relies on measurements of full cell voltage and sporadic surface temperature, does not provide a reliable information on the true internal battery state. Here, we address this issue by transforming off the shelf cells into smart systems by embedding flexible distributed sensors for long-term in-situ and operando thermodynamic data collection. Our approach, which enables the monitoring of the true battery state, does not impact its performance. In particular, our results show that this unprecedented methodology can be used to optimise the performance and map the safety limits of lithium-ion cells. We find that the cell core temperature is consistently and significantly higher than the surface temperature, and reveal a breach of safety limits during a rapid discharge test. We also demonstrate an application of a current considerably higher than the manufacturers' specification, enabling a significant decrease in charging time, without compromising the cell's thermal stability. Consequently, this work on cell instrumentation methodology has the potential to facilitate significant advances in battery technology.