Electrical Energy Storage Systems, Institute for Photovoltaics, University of Stuttgart, 70569 Stuttgart, Germany.
Sensor Technology, Institute for Photovoltaics, University of Stuttgart, 70569 Stuttgart, Germany.
Sensors (Basel). 2018 Nov 6;18(11):3808. doi: 10.3390/s18113808.
Testing of improved battery components and new electrochemical energy storage materials in a coin cell format as a test cell is becoming the state of the art. The pressure on the electrode surfaces inside an electrochemical cell is one of the important parameters for high ionic/electronic conductivity and the cyclic lifetime. A self-designed pressure monitoring cell allows both applying an adjustable pressure and monitoring the state of charge-dependent cell pressure during cycling. The load cell shows a reciprocal behavior of the temperature sensitivity dependent on the ambient temperature and requires constant temperature conditions while monitoring the cell pressure. Further, dependent on the initial cell pressure, the relaxation time of the assembled pressure monitoring cell must be considered. The present paper describes the setup, the influence of the environment temperature and the mechanical relaxation of the pressure monitoring cell. The first cycling results, using an NCM/graphite coin cell, demonstrate the functionality of the pressure monitoring cell measuring the cell's pressure as a function of the C-rate.
在硬币电池形式中测试改进的电池组件和新型电化学储能材料已成为最新技术。电化学电池内部电极表面的压力是实现高离子/电子电导率和循环寿命的重要参数之一。自行设计的压力监测电池允许施加可调压力并在循环过程中监测与充电状态相关的电池压力。在监测电池压力时，称重传感器表现出对环境温度敏感的温度依赖性的倒数行为，并且需要恒温条件。此外，取决于初始电池压力，必须考虑组装压力监测电池的松弛时间。本文介绍了设置、环境温度的影响以及压力监测电池的机械松弛。使用 NCM/石墨硬币电池的首次循环结果证明了压力监测电池测量电池压力作为 C 率函数的功能。
