蓄电池在线内阻测试技术研究

Research of Online Internal Resistance Test Technology on Battery

通过对蓄电池的原理分析,论述了蓄电池的劣化程度与电池内阻的关系。依据蓄电池自供电的在线测试仪电路原理,提出了针对微弱信号隔离降噪、放大、采集和处理等操作的数字化方案。采用实际电路,对设计方案进行功能性验证。测量结果表明,该内阻测试电路满足设计需求和精度要求,同时该电路设计能大大简化电路布局和元器件使用,为后续单芯片集成化、ASIC设计提供了设计参考和理论基础。

Through the analysis of the principle of battery,the relationship between the deterioration of battery and the internal resistance of battery was discussed.According to the circuit principle of battery self-powered on-line tester,a digitization scheme for weak signal isolating,noise reducing,amplifying,sampling and processing was proposed.A practical circuit was used to verify the function of the design scheme.The measurement results showed that the internal resistance test circuit had met the design and precision requirements.Meanwhile,the circuit design could greatly simplify the circuit layout and reduce the amounts of components.The scheme provided a design reference and theoretical basis for single chip integration and ASIC design in the future.