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首页> 外文期刊>Journal of Energy Storage >The design and impact of in-situ and operando thermal sensing for smart energy storage
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The design and impact of in-situ and operando thermal sensing for smart energy storage

机译：智能储能的原位和操作热传感设计及其影响

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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.
机译：锂离子逐渐成为电池供电系统的首选技术。当前的电池性能监控依赖于满电池电压和零星表面温度的测量，无法提供有关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以长期进行原位和操作热力学数据收集，将现成的存储单元转变为智能系统，从而解决了这一问题。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，我们的结果表明，这种空前的方法可用于优化性能并绘制锂离子电池的安全极限。我们发现电池芯温度始终且显着高于表面温度，并在快速放电测试中发现违反安全限制。我们还演示了一种电流的应用，该电流明显高于制造商的规格，可在不损害电池热稳定性的情况下大大缩短充电时间。因此，有关电池仪器方法的这项工作有可能促进电池技术的重大进步。

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