A battery charging and discharging curve sampling system and method

Abstract

The invention discloses a storage battery charge and discharge curve sampling system comprising a test load unit which is used for providing different resistance values at different times; a control unit which controls the connection state of the test load unit and a storage battery; a sampling unit; an automatic storage unit; and an automatic tracking unit which automatically detects the change of the current value and the voltage value in a sampling curve and adjusts the sampling frequency to focus on sampling of current and voltage fluctuation periods. Compared with the systems and the methods in the prior art, random sampling sites are inserted in the sampling process for detecting drastic fluctuation of the sampling curve in the sampling process, and the sampling frequency is increased for the curve of drastic fluctuation so that the storage battery charge and discharge curve can be recorded in a detailed way, high frequency sampling is adopted in the key curve periods, low frequency sampling is adopted in the normal periods, and thus sampling resources like storage space and sampling time can be effectively and reasonably allocated, the key periods can be focused and the efficiency is high.

Description

technical field [0001] The invention relates to the technical field of electrochemical battery capacity detection, more specifically, it relates to a storage battery charging and discharging curve sampling system and method. Background technique [0002] Because electric vehicles are clean, environmentally friendly and non-polluting, they are used more and more in people's daily life, especially for some electric bicycles. Existing batteries for electric vehicles generally use lithium batteries. For the performance of electric vehicles, the performance of the battery plays a key role. The performance of the battery is mainly obtained from the analysis of the charge and discharge curve of the battery, such as the capacity of the battery, the output power of the discharge, and the duration of the discharge. Since the discharge time of the battery is relatively long, it usually lasts for several hours to more than ten hours. It is obviously time-consuming and labor-intensive ...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problem that the battery discharge voltage value or the voltage fluctuation curve in the process of rapid drop in the current value cannot be detected in detail during the sampling process of the battery charge and discharge curve of the electric vehicle in actual use, the first purpose of the present invention is to propose a battery charge and discharge curve sampling system, the second purpose It is to propose a battery charging and discharging curve sampling method based on the above system, the specific scheme is as follows:

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