Storage battery self discharge rapid detection method

Abstract

The invention discloses a storage battery self discharge rapid detection method which comprises the following steps: a, placing a battery unit in a battery pack needing to be detected in a constant-temperature box, then applying an alternating current magnetic field to the battery unit in the constant-temperature box by utilizing a magnetic field generation device, and measuring an initial open-circuit voltage of the battery unit by using a voltage measurement device; b, measuring the open-circuit voltage of the battery unit by the voltage measurement device every discharge interval time until the open-circuit voltage is equal to a cut-off voltage, and thus obtaining a self discharge curve of the battery unit; and c, when delta V as a difference between open-circuit voltages corresponding to arbitrary same time points on the self discharge curve of the battery unit and a standard self discharge curve of a storage battery is larger than a rated voltage difference, judging the battery unit is unqualified. The storage battery self discharge rapid detection method can remarkably accelerate a progress of storage battery self discharge detection, and thus improving the detection efficiency and being beneficial to improving the detection accuracy.

Description

technical field [0001] The invention relates to a detection method for a lead-acid storage battery, in particular to a fast detection method for storage battery self-discharge. Background technique [0002] Lead-acid battery has a history of more than 100 years since its invention. Because of its high safety, stable performance, low manufacturing cost, and high recycling value, it is widely used in the national economy and people's lives. Among them, it has been widely used in electric vehicles, electric bicycles and electric tools. Since the existing lead-acid batteries are usually combined in series and parallel, each battery unit in the battery pack is required to have high consistency. Among them, the self-discharge of the lead-acid battery is one of the important factors affecting the service life of the battery pack. If the self-discharge of each battery unit is inconsistent, when the number of series connection is large, the state difference between the battery units...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of long detection time and low accuracy of detection results in the existing self-discharge detection method of lead-acid batteries, and to provide a fast detection method for self-discharge of storage batteries, which can significantly speed up the self-discharge of storage batteries. The process of discharge detection, thereby improving the detection efficiency and helping to improve the accuracy of detection

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