锂离子电池极片涂层厚度在线测量系统

锂离子电池极片涂层厚度的实时高精度测量是实现对锂电涂层厚度控制的前提。针对在生产过程中的锂离子电池极片涂层厚度动态、非接触、高精度的测量要求，设计了一种基于非接触式电容传感器进行微位移测量的在线式测量系统。介绍了传感器结构及测量电路基本原理，搭建了适用于锂离子电池极片涂层厚度测量的硬件系统，开发了可用于数据采集、线性校正、数据记录的基于虚拟仪器技术的测试系统。经测试，该传感器的分辨力为0.1μm，现场长期运行证明该系统满足生产的测量要求。

The On-line Coating Thickness Measurement System for Lithium-ion Battery Polepieces

The high-accuracy measurement on lithium-ion battery polepiece coating thickness is the prerequisite for good regulation. To satisfy the need of dynamic, non-contact and high-precision measuring, the online measuring system was designed that based on micrometric displacement measuring by non-contact capacitive sensor. The structure and circuit of sensor is introduced, the hardware system suitable for lithium-ion battery polepiece coating thickness measurement is constructed, and the practical testing system based on the virtual instrument technology for data sampling, linear correction and data record is developed. Through the experiment, the resolution of the sensor is 0.1um. By long running in measurement scene, it is proved that the system can meet the production requirements of measurement.