蓄电池内阻与容量关系

蓄电池内阻与容量之间的关系其中有两种含义：

　　电池内阻跟额定容量的关系，以及同一型号电池的内阻跟荷电态SOC的关系。十多年前人们曾经试图利用阀控密封铅酸蓄电池内阻（或电导）的变化去在线检测电池的容量和预测电池寿命，但却未能如愿；人们对动力电池的大电流放电能力提出了越来越高的要求，这就要求尽可能降低电池内阻。因而本文将进一步探索和阐明一些常用蓄电池内阻与容量之间的内在关系。

　　阀控密封

　　当前阀控密封铅酸蓄电池已逐步取代开口式流动电解液铅酸蓄电池，广泛用于邮电通信电源、UPS、储能电源系统等。动力型阀控密封铅酸蓄电池已广泛用于电动助力车。这些领域都要求在线检测蓄电池的荷电态。

　　蓄电池的内阻跟荷电态的关系

　　蓄电池的荷电态SOC指的是电池可以放出的容量跟其额定容量的比。这一数据对邮电通信电源系统和正在使用的动力电池组十分重要。

Relationship between internal resistance and capacity of (primary) battery

The relationship between battery internal resistance and capacity has two meanings:

The relationship between the internal resistance of a battery and its rated capacity, as well as the relationship between the internal resistance of the same type of battery and the SOC in the state of charge. More than a decade ago, people tried to use changes in the internal resistance (or conductance) of valve regulated sealed lead acid batteries to online detect battery capacity and predict battery life, but they failed to achieve this goal; People have put forward higher and higher requirements for the high current discharge capacity of power batteries, which requires reducing the internal resistance of batteries as much as possible. Therefore, this article will further explore and clarify the internal relationship between the internal resistance and capacity of some commonly used batteries.