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| 基于Ansys的锂电池极片辊压质量改善研究 |
| Rolling Quality Improvement of Lithium Battery Pole Pieces Based on Ansys |
| Received:March 02, 2023 |
| DOI：10.3969/j.issn.1674-6457.2023.09.024 |
| 中文关键词: 极片辊压 锂电池 Ansys仿真 弯缸力 弧形辊 辊面长度 |
| 英文关键词: pole piece roll lithium battery Ansys simulation cylinder bending force curved roll roll length |
| 基金项目: |
| Author Name | Affiliation | | LIU Wen-ke | Huizhou Yinghe Technology Co., Ltd., Guangdong Huizhou 516025, China | | ZOU Sheng | Huizhou Yinghe Technology Co., Ltd., Guangdong Huizhou 516025, China | | LI Xue-yong | Huizhou Yinghe Technology Co., Ltd., Guangdong Huizhou 516025, China | | CHEN Jian-ping | Huizhou Yinghe Technology Co., Ltd., Guangdong Huizhou 516025, China | | ZHUO Shi-gao | Huizhou Yinghe Technology Co., Ltd., Guangdong Huizhou 516025, China |
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| 中文摘要: |
| 目的 优化辊压机结构，减小辊压后极片的不均匀性，进一步提升锂电池性能。方法 首先，将辊压机工程模型简化为仿真模型，运用Hypermesh对仿真模型进行网格划分，重点加密极片和轧辊接触区域的网格，将划分好的网格以Inp格式导入Ansys中，设置边界条件并求解计算，模拟轧辊辊压极片的过程。其次，提取极片监测点的仿真数据，换算得到极片辊压后的厚度，将仿真结果与实验数据对比，验证极片辊压仿真方法的准确性。最后，运用该仿真方法分析液压弯缸力、弧形辊弓高和轧辊辊面长度等对极片辊压质量的影响。结果 分析仿真和实验结果可知，辊压后极片的厚度平均值和极差值对标率均在90%以上，证明了仿真方法准确可靠。随着弯缸力(0~784 000 N)逐渐增大，极片厚度极差值先减小后增大;随着弧形辊弓高(0~60 μm)逐渐增大，极片厚度极差值先减小后增大;随着轧辊辊面长度(1 200~1 500 mm)逐渐减小，极片厚度极差值逐渐减小。结论 施加合适的弯缸力、对弧形辊进行设计均可改善极片辊压质量。轧辊辊面长度越小，极片辊压效果越好。可通过极片辊压仿真方法确定最优弯缸力大小与弧形辊最优弓高，该方法大幅度缩短了辊压机研发周期，优化了辊压机性能，提高了极片辊压质量，为锂电池性能的提升奠定了基础。 |
| 英文摘要: |
| The work aims to optimize the structure of the roller press, reduce the non-uniformity of the pole piece roller press, and further improve the performance of the lithium battery. Firstly, the engineering model of the roller press was simplified into a simulation model, and Hypermesh was used to divide the simulation model, focusing on the mesh of the contact area between the pole piece and the roll, and the divided mesh was imported into Ansys in Inp format, and the boundary conditions were set and solved to simulate the process of rolling the pole piece. Secondly, the simulation data of the monitoring point of the polar piece was extracted, and the thickness of the polar piece after rolling was obtained. The simulation results were compared with the experimental data to verify the accuracy of the simulation method. Finally, the simulation method was used to analyze the effects of hydraulic cylinder bending force, arc bow height and roll surface length on the rolling quality of the pole piece. The results of simulation and experiment showed that the average and range of the thickness of the polar piece were above 90%, which proved that the simulation method was accurate and reliable. As the applied bending force (0-784 000 N) gradually increased, the thickness range of the pole piece decreased first and then increased. With the height of the designed curved roll (0-60 μm) increased gradually, the thickness range of the polar piece decreased first and then increased. With the length of the roll surface (1 200-1 500 mm) gradually reduced, the thickness range of the polar piece was gradually reduced. Applying suitable bending force and designing curved roll can improve the rolling quality of the pole piece. The smaller the length of roll surface, the better the rolling effect of the pole piece. The optimal bending cylinder force and the optimal bow height of the curved roll can be determined by the simulation method of the pole piece rolling. This method greatly shortens the development cycle of the roller press, optimizes the performance of the roller press, improves the quality of the pole piece rolling, and lays a foundation for improving the performance of lithium batteries. |
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