鋰離子單電芯電壓的精確量測是鋰離子電池組電池管理系統所必備的重
要功能，本研究探討多個合適的鋰離子單電芯電壓量測電路，如分壓電阻量測
電路、差動放大器量測電路、類比多工器加差動放大器量測電路、光繼電器加
差動放大器量測電路、光繼電器量測電路、多工器加光繼電器量測電路，深入
研究各個電壓量測電路之優缺點，並自行開發出一個植基於 DMOS 元件的鋰
離子單電芯電壓量測電路，本文除了對本電路做仔細的描述，並以一實做的電
路應用於一組 8 個單電芯串聯的電池組上進行充放電時各單電芯電壓的量
測，量測的結果顯示本電壓量測具有高精確度與可靠度。

The accurate measurement of cell voltages in a lithium ion battery
module in series is an important function required by a battery management
system. This paper investigates some of the suitable cell voltage meas-
urement circuits: voltage divider circuit, differential amplifier voltage
measuring circuit, differential amplifier/ analog multiplexer voltage meas-
uring circuit, photo coupler voltage measuring circuit, and photo coupler/
analog multiplexer voltage measuring circuit, for lithium ion battery
modules. Rigorous evaluations of the selected voltage measuring circuits
are presented in the paper. To improve the shortcomings of the existing
voltage measuring circuits, a new voltage measuring circuit based on
DMOS component is designed in this paper. Detailed investigation of the
newly developed DOMS based voltage measuring circuit is also presented
in the paper. Experimental results show good accuracy and reliability of
the DOMS based voltage measuring circuit.