关于连接片阻值对电动汽车用动力电池性能的影响.pdf

学兔兔 汽 车 工 程 2015年(第37卷)第1期 Automotive Engineering 20150l1 连接片阻值对电动汽车用动力电池性能的影响 王丽梅，程 勇 (山东大学能源与动力工程学院，济南 250061) [摘要] 鉴于单体电池间连接片的阻值和极柱的位置影响单节电池的性能，基于Matlab／Simscape开发了单体 电池模型，并利用此模型和以电阻模拟的连接片构建了单节电池模型，仿真分析了连接片阻值对单节电池性能的影 响。结果表明 连接片的存在使与极柱相连的单体电池最先达到电池管理系统设定的放电截止电压，以致影响电池 的性能；与极柱相连的单体电池的率先老化导致与其相邻的单体电池出现过放电的现象，影响单节电池的安全性。 最后，设定各单体电池SOC问最大偏差为0 05，对不同并联电池数目的单节电池进行仿真，得出连接片与电池欧姆 内阻阻值的合理比例。 关键词：电动汽车；连接片阻值；电池仿真模型；电池安全性 The Effects of Connecting Plate Resistance on the Performance of Power Battery for Electric Vehicles Wang Limei Cheng Yong School ofEnergy＆Power Engineering，Shandong University，Jinan 250061 [Abstract] In view of the effects of the resistance of connecting plates and the position of terminal post on the performance of a battery module，a model for battery cell is developed based on Matlab／Simscape，with which and connecting plates simulated as a resistance，a model for battery module is built and a simulation is conducted to analyze the effects of connecting plate resistance on the performance of battery module．The results indicate that con— necting plate make the battery cell connected directly to terminal post the first cell to reach discharge cut-off voltage set by batteq management system，which influences the performance of battery．The battery cell connected to termi- nal post also ages first，leading to the over-discharge of its adjacent cell，and hence affecting the safety of battery module．Finally with the maximum SOC difference between cells s