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验室教授二博士研究生导师三主要研究方向为机械创新设计三梁 欢,男,1988年生三重庆大学机械传动国家重点实验室硕士研
究生三宋代平,男,1979年生三重庆大学机械工程学院副教授三锂电池极片辊压机刚度分析与结构优化
马嵩华1 田 凌2
1.山东大学,济南,250013
2.清华大学,北京,100084摘要:在锂电池极片加工过程中,由于其高能量密度要求与涂覆材料力学性能存在矛盾,故需要根据极片所需压缩比严格控制辊压力的大小,而实际中,轧辊特性使两辊之间窄缝距离的直接测定不容易,因此难以通过物理样机试验的方式直接得到生产过程中辊缝与辊压力之间的关系三针对该问题,简化了辊压过程中的物理量,建立了整机和极片变形的数学模型,利用数学模型间接得到整机辊压力与辊缝变化之间的定量关系三采用仿真驱动设计的方式,基于响应面法和多目标优化算法得到整机的设计优化结果三测试试验表明,简化的数学模型可以数字化地描述辊压机的工作情况,便于指导生产中控制极片的制造工艺参数,同时基于响应面的设计优化提高了辊压机的设计生产效率三
关键词:辊压机;锂电池极片;有限元分析;优化设计
中图分类号:TG333.1;TB472 DOI :10.3969/j .issn.1004132X.2015.06.018Stiffness Anal y sis and Structure O p timization of Rollin g Mill for Lithium ‐ion Batter y Electrode Manufacturin g Ma Son g hua 1 Tian Lin g 21.Shandon g Universit y ,Jinan ,250013 2.Tsin g hua Universit y ,Bei j in g ,100084Abstract :In the p rocess of rollin g electrodes ,due to the contradiction between the ener gy densit y and the material mechanical p ro p erties of coatin g s on the electrode ,the roller p ressure should be con -trolled strictl y accordin g to the com p ression ratio.Actuall y ,the roller surface made the g a p between two rollers difficult to measure throu g h ex p eriments.Conse q uentl y ,it was difficult to directl y q uantif y the relation between the g a p size and roller p ressure b y usin g p h y sical p rotot yp e.The variations of p h y sical q uantities durin g the electrodes manufacturin g p rocess were sim p lified to build the di g ital model of rollin g mill and electrode deformation.With the hel p of the di g ital model ,the relation of g a p variation and p ressure was q uantitativel y simulated.Accordin g to the above stud y ,on the p ur p ose of simulation ‐driven desi g n ,the structural p arameters and work condition of di g ital rollin g mill were o p -timized b y the res p onse surface methodolo gy and multi ‐ob j ective g enetic o p timization al g orithm.The stiffness test has validated the di g ital model and the sim p lification h yp othesis.These results are im -p ortant to la y a p lan for rollin g p rocesses ;meanwhile the research and develo p ment efficienc y is im -p roved b y the res p onse surface ‐based desi g n o p timization.Ke y words :rollin g mill ;lithium ‐ion batter y electrode ;finite element anal y sis ;o p timization desi g n 0 引言人们对移动设备日益增长的需求对电池提出
收稿日期:2013
0820基金项目:国家自然科学基金资助项目(51175287)了高能量密度二长循环寿命二高电压二安全二低廉等
要求三为提高电池储能能力,保证极片材料的压
实程度,需要对极片进行辊压三极片辊压机作用的对象为厚0.2mm 左右的电池极片,
表面精度几微米,以铝箔和铜箔为基体,上面涂覆活性物四308四锂电池极片辊压机刚度分析与结构优化
马嵩华 田 凌