基于微分方程的蓄电池内阻测量技术

Technique for measuring internal resistance of storage battery based on differential equation

提出一种基于微分方程的蓄电池内阻测量方法,通过连接方波发生器,测定方波发生器接通情况下即将断开瞬间其两端的电压,方波发生器断开时即将接通瞬间其两端的电压,方波发生器断开情况下接通瞬间的电压,并通过公式计算获得蓄电池的欧姆内阻值和极化电阻值,用以判定蓄电池的失效程度。本方法能够更精确地反映蓄电池内阻的变化,从而更准确地判断蓄电池的失效程度。与原有测量方法相比较,该方法的计算更加简便,测量结果更加可靠。

A method for measuring internal resistance of a storage battery based on differential equation was presented. The following steps were comprised ： a square wave generator was connected; measuring voltages at two ends of the square wave generator at the moment when the connected square wave generator was about to be disconnected; voltages at two ends of the square wave generator when the disconnected square wave generator was about to be connected and voltage at the moment of the connection of the disconnected square wave generator; and calculating ohm internal resistance value and polarization resistance value of the storage battery through a formula to judge the failure degree of the storage battery. The change of the internal resistance of the storage battery was more accurately so as to judge the failure degree of the storage battery more accurately. Compared with the prior measurement method, the calculation method of the invention was simpler and more convenient, and the measurement result was more reliable.