在过载电流下汽车线束的焦耳热效应与绝缘老化的探讨 米

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中图分类号：U463.62 文献标识码：A 文章编号：1003-8639（2026）03-0159-03

Exploration of Joule Heat Effect and Insulation Aging of Automotive Wiring Harnesses Under Overload Current*

Wang Longxiang， Cui Xueyan （Henan Institute of Technology，Xinxiang 453003， China ）

【Abstract】 This paper explores the changes in the thermal characteristics of the wiring harnessand the aging mechanismoftheinsulatinglayerunderoverloadconditions，nd findsthe intrinsicconnectionbetween heat accumulation and degradation of insulating materials through temperature riseexperiments and microscopic characterization，soas to provideatheoreticalbasisand experimental reference forthedesignofoverload-resistantautomotivewiringharnesses， thermal management， and life evaluation.

【Key Words】 automotive wiring harness； Joule heat; overload current; insulation aging

0 引言

随着新能源汽车高压大电流平台的普及，车载线束系统面临空间受限与负荷增加的双重挑战，过载时的热安全问题也越来越突出。（剩余3456字）