面向多节电池管理系统的高精度电压监测技术
2020 IEEE 15th International Conference on Solid-State & Integrated Circuit Technology (ICSICT)（2020）
Abstract
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.
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Key words
high precision voltage monitoring technology,multicell battery management system,battery usage status,electric vehicle,high-precision voltage monitoring circuit,multiseries battery packs,high voltage BCD process,voltage superposition,battery distinction,voltage conversion circuit,matched negative feedback technology,ground-based analog signals,single cell voltage monitoring error,size 0.18 mum,voltage 40.0 V,voltage 1.92 mV,temperature -40.0 degC to 85.0 degC,voltage 1.5 V to 31.5 V
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