基于交流阻抗法的蓄电池内阻测量  

Battery Internal Resistance Measurement using AC Impendent Method

作　　者：李芳培[1] 毛建国[1] 沈峘[1] 周华鹏[1] 柏方超[1] 卢文玉[1] 

机构地区：[1]南京航空航天大学能源与动力学院,南京210016

出　　处：《重庆工学院学报（自然科学版）》2009年第9期93-98,共6页Journal of Chongqing Institute of Technology

基　　金：国家自然科学基金资助项目(50776044);江苏省普通高校研究生科研创新计划资助项目(CX08B_044Z)

摘　　要：给出了一种基于交流阻抗法的铅酸蓄电池内阻测量方法.用精密电阻和电池构成串联电路,采用交流注入法对蓄电池注入微弱正弦波信号.通过对输出响应进行一系列的滤波、正峰值检测、放大以及AD转换和采集,然后根据测量到的电压比来推算电池内阻.为验证该方法的有效性,设计了基于C8051F040单片机的电池内阻测量系统.以20 Hz的正弦交流信号作为激励源,分别测量电池和精密电阻两端的响应信号,从而推算出电池内阻.试验结果表明:该方法能够被有效地用于铅酸电池内阻测量,测量结果稳定有效.This paper presents a method of the lead-acid battery internal resistance measurement based on AC impedance method. The precision resistance and the battery internal resistance constitute a series circuit, and by injecting a weak sine wave signal into the battery. After output response is processed by filtering, the peak detection, amplification, and AD convert, the battery internal resistance is calculated by the voltage ratios. To validate the proposed method, the battery resistance measurement system based on the C8051F040 MCU is designed. By taking 20Hz sinusoidal AC signal as excitation source and measuring the response signal of battery resistance and precision resistance, the battery internal resistance is calculated. The experimental results show that the proposed method can be effectively used to measure the internal resistance of lead-acid batteries, and the results of measurement are robust and effective.

关 键 词：内阻测量 交流阻抗法 滤波 正峰值检测 C8051F040单片机 

分 类 号：TP277[自动化与计算机技术—检测技术与自动化装置]