新能源汽车用动力电池继电器噪声分析与优化研究  

Research on Noise Analysis and Optimization of Power Battery Relays for New Energy Vehicles

作　　者：李基芳 季祥 孙守富 Li Jifang;Ji Xiang;Sun Shoufu(CATARC New Energy Vehicle Test Center(Tianjin)Co.,Ltd.,Tianjin 300300)

机构地区：[1]中汽研新能源汽车检验中心(天津)有限公司,天津300300

出　　处：《汽车工程师》2025年第1期32-36,共5页Automotive Engineer

摘　　要：针对某新能源汽车动力电池继电器吸合、断开过程中噪声较大的问题,在半消声室内对继电器噪声的传递路径进行贡献量测试分析,结果显示,结构传递路径贡献量高于70%,并提出降低电池配电单元(BDU)安装点橡胶隔振垫硬度和在动力电池上盖板粘贴阻尼材料的优化方案,实车验证结果表明,优化后继电器吸合、断开噪声声压级分别降低3.9 dB(A)、4.1 dB(A),车内继电器噪声问题明显改善。The noise generated during the relays pick-up and disconnection of the power battery for a new energy vehicle is significant.To address the issue,the contribution of the relay noise transfer path is tested and analyzed in a semi anechoic chamber,and the results show that the contribution of the structural transfer path is higher than 70%.The paper proposes to reduce the hardness of the rubber vibration isolation pad at the Battery Distribution Unit(BDU)mounting point and past the damping material on the cover plate of the power battery.Vehicle verification results show that the sound pressure level of the optimized relay pick-up and disconnection noise is reduced by 3.9 dB(A)and 4.1 dB(A)respectively,and the noise of relays in the vehicle is improved significantly.

关 键 词：动力电池 继电器 噪声 传递路径 隔振 阻尼材料 

分 类 号：U469.722[机械工程—车辆工程]