A novel method for simultaneous triggering and in situ sensing of internal short circuit in lithium-ion cells
A novel method for simultaneous triggering and in situ sensing of internal short circuit in lithium-ion cells
复制标题
一种同时触发和原位感测锂离子电池内部短路的新方法
DOI：
10.1039/d3ya00311f
复制
发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Zhang, Guangsheng
中科院分区：
文献类型：
--
作者：
Long, Mary K.;Liu, Siyi;Zhang, Guangsheng
在这里，我们报告了一种新的和简单的方法，触发内部短路（ISC）在锂离子电池的需求和测量关键ISC参数原位。该方法的工作原理是将一对金属焊盘插入锂离子电池中，并通过开关和电流传感器连接电池外部的焊盘。该方法可以模拟现场常见的不同类型的ISC故障。可以测量ISC电流和ISC电阻。该测量还使得能够确定局部ISC热生成速率。通过在金属焊盘之间连接微型温度传感器，也可以测量ISC温度。该方法适用于实验室制造的单层电池和商业上可获得的多层电池在这项工作中。研究结果基本验证了前人关于ISC类型和ISC电阻对锂离子电池性能影响的模型预测。结果表明，该方法可用于验证模型，增强对ISC高度局部化和瞬态行为的理解。它还表明，该方法对锂离子电池性能的影响最小，并在触发ISC具有良好的重复性。
Here we report a novel and simple method for triggering internal short circuit (ISC) in Li-ion cells on demand and measuring critical ISC parameters in situ. The method works by inserting a pair of metal pads into a Li-ion cell and connecting the pads outside the cell through a switch and a current sensor. Different types of ISC that are common in field failures can be simulated by this method. ISC current and ISC resistance can be measured. The measurement further enables determination of local ISC heat generation rate. By attaching a micro temperature sensor between the metal pads, the ISC temperature can be also measured. The method was applied to both lab-made single-layer cells and commercially available multiple-layer cells in this work. The results generally verified previous modeling predictions about the effects of ISC types and ISC resistance on behaviors of Li-ion cells. It suggested that the proposed method can be used to validate models and enhance understanding of highly localized and transient behaviors of ISC. It was also demonstrated that the method has minimal effects on Li-ion cell performance and has good repeatability in triggering ISC.