Based On DOE’s Lithium Ion Battery Continuous Mixing Technology Research
工程领域：机械工程
作者姓名：杨庆岩
指导教师：张冠伟副教授
企业导师：孙菲高级工程师
天津大学机械工程学院
二零一七年五月
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中文中文摘要摘要
近两年随着锂离子电池的发展，动力型锂离子电池市场需求的扩大，客户对锂离子电池的一致性及产能都有了更高的要求，加上客户对锂电成本的控制，如何在不增加设备成本，不增加厂房面积，不增加人工成本等加工成本的基础上做到产能提高并降低安时成本，成为每个锂离子电池厂的重要课题，也成为每名锂电人技术攻关难题。
双螺杆连续制浆技术在锂离子电池生产制造上的应用，在国内乃至国际上都是全新的应用，如果应用成功，将大幅提高锂离子电池制浆的产能，起到降本增效的作用，本文研究的目标就是通过实验验证双螺杆连续制浆技术可以应用在锂离子电池生产制造过程的制浆工序。 在本文中，作者结合锂离子电池制浆的原理，设计了以双螺杆挤出机为主机的连续制浆系统，其中主要对连续给料系统进行了设计选型和精度验证，其计量精度可达±0.3%，并且对双螺杆挤出机的螺杆配置及加料位置进行了优化，然后结合DOE 实验方法，到最优的制浆参数进行实验，将实验产出的浆料与传统匀浆设备产出浆料的黏度，固含量，粒度分布以及电池的内阻和循环性能进行对比，通过对比实验数据取得了以下研究成果：
（1）本文所设计选型的粉体、液体及浆料连续式给料系统，计量精度满足锂离子电池浆料生产需求，其中粉体连续计量系统是首次成功应用在锂离子电池制造行业。
（2）双螺杆连续制浆机可以用于生产NCM 体系浆料和LFP 体系浆料，浆料性能和电池性能均满足要求，
甚至要优于传统制浆机。
（3）双螺杆连续制浆机连续运行稳定，生产效率可提高20%以上。
关键词关键词：：锂离子电池，制浆，双螺杆挤出机，内阻，循环性能
Abstract
Recent years, with the development of lithium ion battery industrial, and growing demand for power battery, the requirement of consistency and capacity of lithium ion battery is moved to a new level. Considering the cost control of the market, how to improve the capacity and cut down the consumption without expending plant area, or increasing equipment and labor cost, becomes the important target of every lithium ion battery factory, and difficulty subject of every engineer.
The application of win-screw continuous mixing technology in lithium ion battery manufacturing is innovation both domestic and abroad; it will greatly improve the production capacity of mixing and reduce cost as well as improve efficiency if successes.
The aim of this essay is to prove win-screw continuous mixing technology could be used in mixing procedure of lithium ion battery manufacturing by experiment.
Continuous mixing system is designed by author in this article according to the principle of lithium ion battery slurring mixing, this system is mainly constructed by a twin screw extruder, designing and equipment selection as well as accuracy verification of continuous feeding system are claimed in this article, the feeding accuracy would be within ±0.3%, also the screw configuration and feeding area of twin screw extruder are optimized. Then the best mixing configuration is found out according to DOE and the test begins, compared viscosity, solid content, particle distribution and internal resistance, cycle performance of the battery of test slurry with the one produced by traditional mixing. And conclusions could be got as followed according to comparison:
1. The power, liquid and slurry continuous feeding systems designed in this article, feeding accuracy could meet the requirement of lithium ion battery slurry producing, among which power continuous feeding system is used in the lithium ion battery producing industrial for the first time successfully.
2. The twin screw continuous mixing equipment could be used to produce NCM slurry and LFP slurry, and the performance of slurry and battery could meet the requirement and even better than that of slurry produced by traditional mixing machine.
3. The twin screw continuous mixing equipment runs steadily and continuously, while production efficiency could be increased by over 20%.
Keywords：Lithium ion battery，Mixing，Twin screw extruder，Internal resistance，Cycle performance
目录
中文摘要........................................................................................................................ I Abstract ......................................................................................................................... I I 目录.............................................................................................................................. I II 图清单........................................................................................................................... V 表清单........................................................................................................................ VII 字母注释表............................................................................................................... V III 第一章绪论 (1)
1.1选题背景 (1)
1.2国内外研究现状综述 (2)
1.3论文的主要研究内容及章节安排 (6)
第二章锂离子电池浆料的分散原理与DOE实验方法研究 (9)
2.1引言 (9)
2.2锂离子电池简介 (9)
2.3锂离子电池浆料的分散原理 (12)
2.4 DOE实验方法及优化流程 (15)
2.5本章小结 (21)
第三章双螺杆连续制浆机设计及优化研究 (22)
3.1引言 (22)
3.2双螺杆连续制浆机的系统设计 (22)
3.3给料系统选型及计量精度验证 (23)
3.4双螺杆挤出机的结构分解 (28)
3.5双螺杆连续制浆机的螺杆配置及加料位置优化 (32)
3.6优化结果验证 (35)
3.7本章小结 (36)
第四章双螺杆连续制浆机锂离子电池浆料制浆应用实验 (37)
4.1引言 (37)
4.2 NCM（三元）材料制浆实验 (37)
4.3 LFP（磷酸铁锂）材料制浆实验 (47)
4.4本章小结 (58)
第五章工程应用 (59)
5.1引言 (59)
5.2 NCM材料体系双螺杆连续制浆工程应用 (59)
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