Study on Contact Resistance Characteristics of Electrical Connectors of Power Battery Module

doi:10.3901/JME.2020.11.080

Abstract

Abstract: In recent years, the electric vehicle is developing rapidly, but the accident frequently occurred, which a large part of the reason is the insufficient stability of electrical equipment. However, the security of electrical connectors is the key to electrical equipment stability, especially for high voltage power battery packs. Based on the manufacturing process of electrical connectors, the high-voltage connectors of electrical contact are explored under the conditions of complicated working focusing on the three core technologies, including contact stress, contact resistance, and consistency evaluation. Firstly, the dynamic model of contact stability under vibration conditions is proposed, and the vibration relationship between the frequency and amplitude is studied. Furthermore, the vibration test of a single electrical connector and the battery module are carried out, which discover the contact resistance relationship between the contact area and the vibration frequency. Finally, in combination with the safety requirements and related theories of electric vehicles, an improved method of consistency evaluation for electrical connectors is proposed to guide the online performance evaluation and structure optimization and provides a viable test for improving the safety of high-voltage electric vehicles.

Key words: electric vehicle, electrical connector, contact resistance, vibration condition, consistency evaluatio

CLC Number:

TM501

LI Jiehao, WANG Junzheng, WANG Shoukun, GAO Qun, XU You. Study on Contact Resistance Characteristics of Electrical Connectors of Power Battery Module[J]. Journal of Mechanical Engineering, 2020, 56(11): 80-88.

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