锂离子电池的发展和应用深刻改变了人类社会的生活方式，从移动生活的便捷性到环保出行和可再生能源储存等，它们在各个领域都扮演着不可或缺的角色。锂离子电池制造过程中的浆料粘度直接影响涂布均匀性和电池成品性能，是电池生产的关键质量控制环节，行业内目前主要采用人工取样离线测量的方式，操作复杂且时效性差。本文研究了锂离子电池浆料的流变特性和配方、温度、工艺及测量时间的影响，研制了一种基于音叉振动式传感器的浆料在线粘度测量系统，并开发了独有的浆料粘度算法模型和标定方法，具有标定简单和系数自修正的功能。系统在完成实验室对比测试的基础上直接安装于浆料生产线上，通过大量的现场数据验证，取得了多配方，多批次，正负极材料适用的较好测量效果。

The development and application of lithium-ion batteries have profoundly changed the way of life in human society and played a vital role in various fields such as mobile communication， green transportation and renewable energy storage. In the manufacturing process of lithium-ion batteries， the viscosity of the slurry directly affects the coating uniformity and the performance of finished product， acting as a key quality control in battery mass production. Currently， the battery industry mainly takes the practice of manually sampling the slurry for offline viscosity measurement， which is complicated in operation and time consuming. This article studies the rheological properties of the lithium-ion battery slurry and the influence of slurry formula， temperature， manufacturing process， and the measurement time. An online viscosity measurement system based on a tuning fork vibration sensor is developed， along with a unique slurry viscosity algorithm model， featuring simple calibration and automatic coefficient correction. After completing laboratory tests， the system is directly installed on the slurry production line. A large amount of on-site data is acquired and analyzed， which proves that the sensor works well in slurry viscosity measurement with various formulas， production batches， and anode/cathode materials.