锂电池中碳基集流体与金属极耳的连接方式及参数优化
PDF下载 (252)吴 勇,孙宝寿,周旭峰,刘兆平.锂电池中碳基集流体与金属极耳的连接方式及参数优化[J].宁波大学学报(理工版),2023,36(6):30-35.DOI:10.20098/j.cnki.1001-5132.2023.0239
WU Yong,SUN Baoshou,ZHOU Xufeng,LIU Zhaoping.Connection strategy and parameter optimization of carbon-based current collector and metallic tab in lithium battery[J].Journal of Ningbo University(Natural Science & Engineering Edition),2023,36(6):30-35.DOI:10.20098/j.cnki.1001-5132.2023.0239
| Title: | Connection strategy and parameter optimization of carbon-based current collector and metallic tab in lithium battery |
| 作者: | 吴 勇, 孙宝寿, 周旭峰, 刘兆平 |
| Author(s): | WU Yong, SUN Baoshou, ZHOU Xufeng, LIU Zhaoping |
| 关键词: | 锂电池; 碳基集流体; 金属极耳; 导电性; 连接强度 |
| Keywords: | lithium battery; carbon-based current collector; metallic tab; electrical conductivity; connection strength |
| 分类号: | TG457.19 |
| DOI: | 10.20098/j.cnki.1001-5132.2023.0239 |
| 文献标识码: | A |
| 摘要: | 碳基集流体具有质量轻、耐腐蚀等优点, 但在锂电池应用中存在与金属极耳难以用传统焊接方式进行有效连接的共性问题, 为此本文旨在发展两者的创新连接方案, 以解决碳基集流体的应用难题, 提出了3种可能的连接方式. 通过分析对比不同连接方式的导电性能、力学性能以及在软包电池中的应用效果, 来判定碳基集流体与金属极耳的连接有效性, 最终优选出双层极耳连接作为最佳连接方式, 并进一步采用正交实验对双层极耳连接进行了工艺参数优化. 结果表明, 提出的创新连接方式能够提供优良的导电接触和连接强度, 确保碳基集流体在锂电池中的正常应用. |
| Abstract: | Carbon-based current collectors have the advantages of light weight and corrosion resistance, but there are common problems in connecting them to metal tabs in lithium batteries through conventional welding methods. Three possible connection methods are proposed to determine the effectiveness of the connection between the carbon-based collector and the metal tabs by comparing the electrical and mechanical properties of the different connection methods and their application in pouch cells, and finally a double-layer tab connection is found to be the best connection method. Further orthogonal experiments are carried out to optimize the process parameters for the bilayer tab connection. The results show that the innovative connection method proposed in this paper can provide excellent conductive contact and connection strength to ensure the proper application of carbon-based collectors in lithium batteries. |
| 参考文献 /References: | [1] 倪江锋, 周恒辉, 陈继涛, 等. 锂离子电池集流体的研究[J]. 电池, 2005, 35(2):128-130. [2] 刘松, 侯宏英, 胡文, 等. 锂离子电池集流体的研究进展[J]. 硅酸盐通报, 2015, 34(9):2562-2568. [3] 孙仲振. 锂离子电池集流体的研究进展[J]. 云南化工, 2020, 47(8):11-14. [4] Chen Y N, Fu K, Zhu S Z, et al. Reduced graphene oxide films with ultrahigh conductivity as Li-ion battery current collectors[J]. Nano Letters, 2016,16(6):3616-3623. [5] Gwon H, Kim H S, Lee K U, et al. Flexible energy storage devices based on graphene paper[J]. Energy & Environmental Science, 2011, 4(4):1277-1283. [6] Choi H, Nguyen P T, Van Tran C, et al. Micro-patterned metal current collectors for high aspect ratio flexible graphene supercapacitors[J]. Applied Surface Science, 2020, 510(30):145432. [7] Wu Q, Yang J L, Zhao Y W, et al. Lifting the energy density of lithium ion batteries using graphite film current collectors[J]. Journal of Power Sources, 2020, 562(10): 227991. [8] 方伟. 3D Co3O4/碳纤维布柔性锂离子电池负极的制备及电化学性能研究[D]. 哈尔滨: 哈尔滨工业大学, 2013. [9] 钟盛文, 胡经纬, 吴子平, 等. 正极集流体为碳纳米管宏观膜的锂离子电池及其性能[J]. 新型炭材料, 2014, 29(4):322-328. [10] Wang Y, Chen K H. Low-cost, lightweight electrodes based on carbon fibers as current collectors for aluminum-ion batteries[J]. Journal of Electroanalytical Chemistry, 2019, 932(1):113374. [11] 李林贺, 刘志盛. 锂电池极耳超声波焊接质量分析[J]. 焊接技术, 2012, 41(6):46-49. [12] 陈宏, 胡金丰, 衣守忠. 高倍率锂电池极耳研究[J]. 电源技术, 2013, 37(4):540-542. [13] Michael D L, Seop S H. Prediction of optimum welding parameters for weld-quality characterization in dissimilar ultrasonic-welded Al-to-Cu tabs for Li-ion batteries[J]. Metals and Materials International, 2022, 29(1):22-28. [14] 黄少军. 极耳连接电阻对叠片锂离子电池性能的影响[J]. 广东化工, 2021, 48(23):49-51; 42. [15] 曹瑜琦. 锂离子动力电池铝极耳超声波焊接工艺研究[J]. 新技术新工艺, 2017, 2(3):40-45. [16] 冯吉才. 异种材料连接研究进展[J]. 航空学报, 2020, 43(2):1-37. [17] 金希红, 何宗锴, 夏旭光, 等. 异种材料单搭接接头力学性能[J]. 科学技术与工程, 2022, 22(13):5236-5242. [18] Das A, Ashwin T R, Barai A. Modelling and characterisation of ultrasonic joints for Li-ion batteries to evaluate the impact on electrical resistance and temperature raise[J]. Journal of Energy Storage, 2019, 22 (4):239-248. |
| 备注/Memo: | 收稿日期:2023-02-24.宁波大学学报（理工版）网址:http://journallg.nbu.edu.cn/ 基金项目:浙江省“领雁”研发攻关计划项目（2022C01071）. 第一作者:吴勇（1995－）,男,河南信阳人,在读硕士研究生,主要研究方向:锂电池.E-mail:wuyong@nimte.ac.cn *通信作者:周旭峰（1980－）,男,浙江宁波人,研究员,主要研究方向:锂电池、石墨烯.E-mail:zhouxf@nimte.ac.cn 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ |
