An Area-Efficient High-Precision Analog Front End for Battery Management System

IF 4 2区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Circuits and Systems II: Express Briefs Pub Date : 2025-03-13 DOI:10.1109/TCSII.2025.3551150

Kuan Deng;Jie Ding;Jingnan Zheng;Yongzhen Chen;Jiangfeng Wu

引用次数: 0

Abstract

An analog front end (AFE) for monitoring the voltages of a stack of sixteen Li-ion batteries is presented. Each cell has a conversion voltage range of 0 to 5 V, allowing for a stack maximum input voltage of up to 80 V. The gate voltage bootstrap switch in high-voltage applications accurately measures battery voltage, reducing nonlinear sampling errors and significantly shrinking circuit size by omitting LDMOS devices. Furthermore, the high voltage switch charge injection cancellation is adopted to counteract the error introduced by the asymmetric sampling switches. All sixteen channels were sampled and amplified within

$16~{\mu }$

s. The AFE is fabricated using a

$0.18~{\mu }$

m high-voltage BCD process, and the total circuit area is 0.32 mm2. The measurement error for the 16-channel battery voltage is within 1 mV.

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一种用于电池管理系统的面积高效高精度模拟前端

介绍了一种用于监测16个锂离子电池堆叠电压的模拟前端（AFE）。每个电池的转换电压范围为0到5v，允许堆叠最大输入电压高达80v。门电压自举开关在高压应用中精确测量电池电压，减少非线性采样误差，并通过省略LDMOS器件显着缩小电路尺寸。此外，采用高压开关电荷注入抵消非对称采样开关带来的误差。所有16个通道在$16~{\mu}$ s内采样和放大。该AFE采用$0.18~{\mu}$ m的高压BCD工艺制作，总电路面积为0.32 mm2。16路电池电压测量误差在1mv以内。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Transactions on Circuits and Systems II: Express Briefs 工程技术-工程：电子与电气

CiteScore

7.90

自引率

20.50%

发文量

883

审稿时长

3.0 months

期刊介绍： TCAS II publishes brief papers in the field specified by the theory, analysis, design, and practical implementations of circuits, and the application of circuit techniques to systems and to signal processing. Included is the whole spectrum from basic scientific theory to industrial applications. The field of interest covered includes: Circuits: Analog, Digital and Mixed Signal Circuits and Systems Nonlinear Circuits and Systems, Integrated Sensors, MEMS and Systems on Chip, Nanoscale Circuits and Systems, Optoelectronic Circuits and Systems, Power Electronics and Systems Software for Analog-and-Logic Circuits and Systems Control aspects of Circuits and Systems.