基于充电桩的电动汽车电池非拆卸式绝缘检测方法  

Non-disassemble insulation measurement method of electric vehicle battery based on charging pile

作　　者：熊刚 章云区 XIONG Gang;ZHANG Yunqu(Fujian Nebula Electronics Co.,Ltd,Fuzhou 350015)

机构地区：[1]福建星云电子股份有限公司,福州350015

出　　处：《电气技术》2023年第5期46-51,57,共7页Electrical Engineering

基　　金：福建省科技计划项目(2018H41010052)。

摘　　要：近年来,随着电动汽车保有量的快速增加及电池电压平台的不断提升,电动汽车绝缘安全问题变得越来越重要。在非拆卸情况下,如何确认电动汽车的绝缘检测功能及测量精度已经成为一个难题。现有充电桩侧主流使用不平衡绝缘检测方法,该方法无法准确获取汽车电池的绝缘阻抗。为此,本文对现有绝缘检测方法及等效电路进行深入研究,并基于充电桩中现有的绝缘检测模块,提出一种新的检测方法。该方法可实现电动汽车电池非拆卸式绝缘电阻检测。仿真研究表明,新的检测方法具有较高的检测精度,并且对电池包绝缘保护功能的影响较小。本文提出的方法可以确认电池包绝缘检测功能及测量精度,并且可以实现充电桩端的实时安全监控,从而提高电池充电过程的安全性。In recent years,with the rapid increase in the number of electric vehicles and the continuous improvement of battery voltage platforms,the insulation safety issue of electric vehicles has become increasingly important.How to confirm the insulation measurement function and measurement accuracy of electric vehicles without disassembly has become a difficult problem.Existing charging pile side mainly uses unbalanced insulation measurement methods,which cannot obtain accurate insulation impedance of automotive batteries.For this reason,this paper conducts an in-depth study of existing insulation measurement methods and equivalent circuits,and proposes a new measurement method based on the existing insulation measurement module in the charging pile.This scheme realizes the detection of non-dismantling insulation resistance of electric vehicles.The simulation results show that the new measurement method has high accuracy and has little impact on the insulation protection function of the battery pack.The method proposed in this paper can confirm the battery insulation measurement function and measurement accuracy,and can achieve real-time safety monitoring of the charging pile end,thus improving the safety of the battery charging process.

关 键 词：充电桩 电动汽车 绝缘检测 不平衡电桥 非拆卸式检测 

分 类 号：U469.72[机械工程—车辆工程] TM910.6[交通运输工程—载运工具运用工程]