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电子工程2019年16期

相敏检波器(PSD)在电池内阻测试中的运用
丁常坤,郑彦朴,杨炯
(广州致远电子有限公司,广东 广州 510660)

摘  要:电池内阻的测试,主要是利用一组交流信号通过待测电池,提取出电池两端的交流信号幅值,利用电子开关鉴相器对测试信号进行矢量分离,最终得出所测的电阻值。很多场合对于电池内阻的测试有较高的精度要求。不同的电池,其内部的阻值也不一样,有几mΩ 至十几kΩ 的跨度,所以在这个范围内,均要实现电池内阻的有效测试。利用PSD 技术高信噪比的测试特点,能很好地实现微弱信号的检测,因而能很好地实现电池内阻的测试。


关键词:电池内阻;交流测试;鉴相器;矢量分离



中图分类号:TM934.1         文献标识码:A         文章编号:2096-4706(2019)16-0031-03


Application of Phase Sensitive Detector (PSD) in Battery Internal Resistance Test

DING Changkun,ZHENG Yanpu,YANG Jiong

(Guangzhou Zhiyuan Electronics Co.,Ltd.,Guangzhou 510660,China)

Abstract:The test of battery internal resistance is mainly to use a group of ac signals through the battery to be tested,take out the AC signal amplitude at both ends of the battery,use electronic switch phase detector to conduct vector separation of the test signal,and finally get the measured resistance value. In many cases,high accuracy is required for the measurement of battery internal resistance.Different battery,its internal resistance is also different,spans ranging from several mΩ to more than ten kΩ,so in this range,to achieve the effective test battery internal resistance. Using PSD technology,its high signal-to-noise ratio test characteristics,can well achieve weak signal detection,so it can well achieve the battery resistance test.

Keywords:battery internal resistance;communication test;phase discriminator;vector separation


参考文献:

[1] 徐晓东,刘洪文,杨权. 锂离子电池内阻测试方法研究 [J].中国测试,2010,36(6):24-26.

[2] 宋改青,董有尔. 锁相放大器在电池内阻测量中的应用 [J]. 物理测试,2006(2):57-59+62.

[3] 高晋占. 微弱信号检测 [M]. 北京:清华大学出版社,2011:182-185.


作者简介:丁常坤(1992.12-),男,汉族,江西赣州人,硬件工程师,本科,研究方向:仪器测量研究。