基于随机振动疲劳分析的动力电池支架改进及轻量化设计

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中图分类号：U463.32；TB115.1 文献标志码：B

Improvement and lightweight design of power battery bracket based on random vibration fatigue analysis

ZHANG Zheng， JIANG Bing， ZHANG Guiwan， LIU Wenhui，LI Feng， YIN Yangping

（Jetour Division，Chery Automobile Co.，Ltd.，Wuhu 2410OO，Anhui，China）

Abstract：To improve the fatigue life of batery bracket of a pure electric light truck，the random vibration fatigue analysis method is used for the analysis and lightweight design of the power battery bracket.The random vibration fatigue analysis model for the power battery bracket is built using finite element analysis software，and the fatigue life and structural mass of the improved power batery bracket is compared with the original one.The result shows that，on the basis of ensuring the fatigue life of the power batery bracket，the improved structure of the power battery bracket can reduce the mass about 19.5% . The effectiveness of the improved proposal is verified by the proving ground fatigue road test.

Key words： battery bracket； random vibration ； PSD spectrum； fatigue life； lightweight

0引言

能源短缺、大气污染和气候变化等问题是目前汽车产业面临的巨大挑战，这也导致全球汽车产业慢慢转型，纯电动汽车得到迅速发展[1]。（剩余4954字）