Microsystems based stable, reliable, and real-time sensor array for in-situ thermal monitoring of lithium-ion batteries

在接下来的十年里，随着汽车制造商转向电气化，预计汽车的电气化程度将大幅提高。可充电锂离子（Li-ion）电池被认为是电气化领域的心脏。锂离子电池的可靠和安全运行至关重要。电池温度的实时监测是安全可靠运行的基本要求之一。为了提高电池的寿命、可靠性和安全性，必须控制电池内部产生的热量。如果过热，化学能迅速转化为热能，导致过热，然后热跑道可能导致故障，火灾，甚至爆炸。有效的电池管理系统（BMS）可以确保适当的热管理，但它依赖于在所有运行状态下精确的温度传感。目前的传感技术主要是利用放置在电池表面离散位置的热电偶传感器来监测温度，这些传感器缺乏提供完整热图所需的空间分辨率。因此，每个电池内部的原位温度传感对于适当的BMS至关重要。原位传感器需要微型、灵活和高度稳定的温度传感器，这些传感器可以放置在电池组内部，并且应该与电池内部的环境兼容。这种技术解决方案备受追捧，以减少故障并提高安全性。该催化剂项目是加拿大微传感器研究人员与印度国际电池热研究小组合作的第一阶段，将测试锂离子电池热系统中强大的原位微传感器的可行性。预计这将为电动汽车电池的热管理带来关键转变，从而为电池技术的长期合作、拨款、资助项目和许多经济机会创造机会。这项研究的结果将提高加拿大的领导地位和竞争力，从而有助于塑造加拿大在电池和电动汽车领域的未来。

Over the next decade, the electrification of automobiles is expected to rise dramatically as automakers pivot toward electrification. Rechargeable Lithium-ion (Li-ion) batteries are considered the electric heart within the electrification sector. It is essential that Li-ion batteries operate reliably and safely. One of the fundamental requirements for safe and reliable operation is real-time temperature monitoring of the battery. The heat generated inside the battery must be controlled to improve its lifecycle, reliability, and safety. If it is overheated, chemical energy quickly converts to thermal energy, leading to overheating, and then a thermal runway may cause failure, fire, or even explosion. An effective battery management system (BMS) ensures proper thermal management, but it relies on accurate temperature sensing during all operating states. The current sensing technology focuses on monitoring temperature using thermocouple sensors placed at discrete and strategic locations along battery surfaces, which lack the required spatial resolution to provide a complete thermal map. In situ temperature sensing inside each cell is therefore of paramount importance for proper BMS. In situ sensors require miniature, flexible and highly stable temperature sensors that can be placed inside the battery pack and should be compatible with environments inside the cells. Such a technological solution is highly sought after to reduce failure and improve safety. This catalyst project is to initiate first stage of collaboration between Canadian microsensor researchers and an international battery thermal research group at India will test the viability of a robust, in situ, and microsensors for Li-ion battery thermal system. It is expected to create a pivotal shift in the thermal management of EV batteries, thus creating opportunities for long-term collaboration, grants, funded projects and many economic opportunities in battery technology. The outcome of this research will increase Canada's leadership and competitiveness and thus contribute to shaping Canada's future in the battery and EV sectors.