作者：宋改青, 董有尔

作者单位：山西大学物理电子工程学院, 山西 太原 030006

关键词：电池; 电池内阻; 锁相放大器; 干扰和噪声; 微弱信号; 在线监测

摘要：

本文对传统的电池内阻测量方法进行了研究比较,提出了用锁相放大器测量电池内阻的新方法,详细阐述了锁相放大器的基本结构与工作原理以及用锁相放大器实现电池内阻测量的实际电路,通过对多种电池内阻的测量以及电池充放电过程中内阻的在线监测,有效地克服了噪声和干扰,快速获得稳定、精确的内阻测量数据,能实现完全的在线检测,并且简化了设计。

Realization of on-line measurement of battery internal resistance by lock-in amplifier

SONG Gai-qing, DONG You-er

College of Physics and Electrics Engineering, Shanxi University, Taiyuan 030006, China

Abstract: The authors have carried on the comparison research to the traditional battery interface resistance measuring technique,proposed new method to test battery interface resistance with the phase-lock amplifier.They elaborated the phase-lock amplifier basic structure,the principle of work as well as realization of practical electric circuit for battery interface resistance measurement with the phase-lock amplifier survey.By many kinds of batteries interface resistance testing and other experiments,it shows that this method can overcome the noise and the disturbance and acquire data quickly and precisely and thus realize the complete online examination and simplify design.

Keywords: Battery; Internal resistance of cell; Lock in amplifier; Interfere and noise; Faint signal; On-line monitoring

2006, 32(2): 78-81  收稿日期: 2005-9-5;收到修改稿日期: 2005-11-17

基金项目: 

作者简介: 

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