Battery health state detection method, device and system

Abstract

The present invention discloses a storage battery health status detection method. The method comprises the following steps of monitoring the voltage V applied at the two ends of a to-be-detected storage battery; when V is larger than Ve and smaller than Vf, starting the discharging process; at the discharging startup moment, acquiring the voltage Vc and the current Ic of a discharging loop; when the discharging time T is larger than or equal to Td, acquiring the voltage Vd and the current Id of the discharging loop and calculating the delta V and delta I, wherein delta V is equal to the difference of Vc and Vd, and delta I is equal to the difference of Id and Ic; and calculating a health coefficient S, wherein the result of delta V divided by delta I is multiplied by T to obtain S. The invention also discloses a storage battery health status detection device and a system. According to the technical scheme of the invention, the defect of the conventional method through only simply monitoring the voltage and the temperature data of the to-be-detected storage battery in the prior art can be overcome. Meanwhile, the problem that the capacity checking type discharge test conducted on the to-be-detected storage battery is limited by the conditions of equipment, manpower, time, system off-line state and the like can be solved.

Description

technical field [0001] The invention relates to the field of battery monitoring, in particular to a battery health state detection method, device and system. Background technique [0002] Batteries have been widely used in various backup DC power systems. As an energy storage component, they play an important role in the DC power system, and their health status directly determines the reliability and safety of the entire DC power system. [0003] At present, most of the monitoring methods for the battery are to predict the health status of the battery by monitoring the terminal voltage of the battery during discharge and float charge and the temperature of the battery. However, since this method cannot reflect the capacity of the storage battery, it is impossible to find aging or failed storage batteries in the power supply system. [0004] At present, the most effective detection method is the battery capacity checking discharge test, but the implementation of this method ...

AI Technical Summary

Problems solved by technology

However, this method cannot find aging or failed batteries in the power system because it cannot reflect the capacity of the battery

[0004] At present, the most effective detection method is the battery capacity checking discharge test, but the implementation of this method is cumbersome and wasteful: the battery discharge needs to be separated from the DC power supply system, and there is a potential safety risk; a special discharge instrument is required to ensure the constant current discharge of the battery and Measurement of battery terminal voltage; Generally, the battery packs of medium and large DC power supply systems have hundreds of batteries, and the wiring workload for discharging is heavy, and the discharge time is as long as tens of hours, so the checking discharge test is impossible It is often carried out, and discharging the battery for a long time not only wastes a lot of electric energy but also reduces the life of the battery

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