基于锁相放大技术检测VRLA电池的内阻  

Detecting internal resistance of VRLA battery based on phase-lock amplifier

作　　者：汤秀芬[1] 魏凤兰[2] 

机构地区：[1]宁夏大学物理电气信息学院,宁夏银川750021 [2]北方民族大学成人教育中心,宁夏银川750021

出　　处：《电池》2009年第1期38-39,共2页Battery Bimonthly

摘　　要：分析了阀控式铅酸(VRLA)电池内阻的测试方法,介绍了采用交流比例法在线测量电池内阻装置的原理。介绍了采用锁相放大技术实现内阻测量的实际电路。该装置通过采用平衡调制解调芯片AD630,既简化了设计,抑制了干扰和噪声,又可以精确测量VRLA电池的内阻。Detecting methods of the internal resistance of valve regulated lead-acid（VRLA） battery were analyzed; the principle of on-line detecting battery internal resistance by AC proportion method was introduced. The circuit using phase-lock amplifier technic to detect the internal resistance was introduced. By using balanced modulator/demodulator AD630, the device simplified the design,suppressed the interference and noise,could accurately measure the internal resistance of the VRLA battery.

关 键 词：阀控式铅酸(VRLA)电池 内阻 锁相放大 交流比例法 

分 类 号：TM912.1[电气工程—电力电子与电力传动]