摘要随着可再生能源的规模利用和智能电网的快速发展，发展与之相配套的高效储能技术显得尤为重要。液流储能电池可以通过增加单电池的个数来提高电池容量，适用于大规模储能，凭借这一特点液流电池成为目前主流的储能技术之一。本论文以智电芳华蓄电研究所提供的第三代锌镍单液流电池为研究对象，对其进行内部流场的优化分析。86935

本文首先针对锌镍单液流电池的电堆内部流道建立物理模型和数学模型，然后对模型进行网格划分。借助FLUENT软件，对锌镍单液流电池内部流场进行了模拟。根据模型的数值模拟结果，从流场均匀性的角度出发，对原电池结构予以改进。模拟研究表明极板与入口流道间距离对流场有一定的影响，其中当极板与入口流道间距离为0时流场的均匀性最好。其次研究了入口结构对流场分布的影响，通过在入口处增加挡板及改变梯形槽倾角的方式来提高流场分布的均匀性。模拟结果表明，在流道入口处放置45°挡板并将梯形槽的倾角调整为70°时流场均匀性最好。最后研究电解液流速对流场的影响，结果显示当入口流速为0。005m/s时，电池内部流场分布最均匀。

毕业论文关键词：单液流电池；流场；结构优化

Abstract With the rapid development of renewable energy and smart grid, it is very important to develop high efficiency energy storage technology。The capacity of the liquid flow battery can be increased by the number of single battery , it is suitable for large scale energy storage。 With this feature, the liquid flow battery has become one of the main energy storage technologies。The research object of this thesis is the third generation of zinc-nickel single flow battery provided by the Battery research institute,and the optimization analysis of its internal flow field is carried out。 

In this paper, we established the physical model and mathematical model of the internal flow in zinc-nickel single liquid flow battery, and pided the model into grid 。 Then we simulated the internal flow field of Zn Ni single flow battery with the help of FLUENT。According to the numerical simulation results of the model,we improved the structure of the original battery from the point of view of the uniformity of the flow field。Simulation studies showed that the distance between the plate and the inlet channel has a certain effect on the flow field。  Among this the uniformity of the flow field is best when the distance between the plate and the inlet channel is 0。 Secondly, the influence of inlet structure on flow field distribution was studied。 The uniformity of the flow field distribution was improved by adding the baffle plate at the entrance and changing the inclination angle of the trapezoidal groove。 The results showed that the flow field uniformity is best when the 45  baffle is placed at the entrance of the runner and the inclination angle of the trapezoidal groove is adjusted to 70 degree。 Finally, the effect of electrolyte flow rate on the flow field was studied。 The results showed that the flow field distribution is the most uniform when the inlet flow rate is 0。005m/s。

Keywords: single redox flow battery；flow field；structural optimization

目录

第一章  绪论 1

1。1 课题背景 1

1。2 液流电池国内外研究进展 3

1。2。1 国外研究进展 3

1。2。2 国内研究进展 4

1。3 课题研究的目的和意义 6

1。4 课题研究内容 7

第二章  数值模拟理论基础