摘要
为了有效监控电动汽车电池组的使用状态,本文基于0.18μm、40 V高压BCD工艺,设计了一种适用于多节串联电池组的高精度电压监测电路。该电路利用串联电池组中电池电压叠加的特点,针对不同电池的电压特性,采用电压转换电路和与之匹配的负反馈技术,实现了电池绝对高压至基于地的模拟信号的有效“缩放”。在typical/slow/fast工艺角、-40℃〜85℃及1.5 V〜31.5 V环境下,仿真结果表明该电路对单节电池电压的监测误差为1.92 mV,且相对误差率小于0.043%,呈现出了较强的鲁棒性。
In order to effectively monitor the battery usage status of electric vehicle,this paper designs a high-precision voltage monitoring circuit applied to multi-series battery packs,which based on the 0.18μm,40 V high voltage BCD process.According to the characteristics of the voltage superposition and battery distinction in the series battery pack,this circuit uses the voltage conversion circuit with the matched negative feedback technology to achieve effective"scaling"of the battery's absolute high voltage to ground-based analog signals.Under the typical/slow/fast process corners,-40℃〜85℃and 1.5 V〜31.5 V,the simulation results show that the monitoring error of single cell voltage is 1.92 mV,and the relative error rate is less than 0.043%,showing out of the strong robustness.
作者
李青
郭仲杰
陈浩
何帅
LI Qing;GUO Zhongjie;CHEN Hao;HE Shuai(Department of Electronic Engineering,School of Automation and Information Engineering,Xi'an University of Technology,Xi'an 710048,China)
出处
《传感技术学报》
CAS
CSCD
北大核心
2020年第7期950-955,共6页
Chinese Journal of Sensors and Actuators
基金
国家自然科学基金面上项目(61771388)
陕西省教育厅科学研究计划项目(19JC029)。
关键词
电池监测
高精度
负反馈
电池管理系统
电动汽车
battery monitoring
high precision
negative feedback
battery management system
electric vehicles
