Method for rapidly sorting lithium ion batteries

Abstract

The invention discloses a method for rapidly sorting lithium ion batteries. The method involves a formatting and capacity grading detection cabinet and a battery sorting terminal, the formatting and capacity grading detection cabinet and the battery sorting terminal are in telecommunication connection through a network transmission module, the formatting and capacity grading detection cabinet canperform formatting and capacity grading treatment on the lithium batteries, and the formatting and capacity grading treatment process is divided into a constant current charging stage, a constant voltage charging stage, a self discharge stage and a discharge stage; a rapid recording and sorting unit is arranged in the battery sorting terminal, the rapid recording and sorting unit comprises a cross-shaped three-dimensional coordinate system, the cross-shaped three-dimensional coordinate system is composed of a horizontal axis (x-axis), a longitudinal axis (y-axis) and a four-section vertical axis (z-axis), the horizontal axis, namely the x-axis, represents the current, the longitudinal axis, namely the y-axis, represents the voltage, and the vertical axis, namely the z-axis, represents thetime of different stages; and the lithium batteries which do not meet the requirement can be picked out before grouping, the performance of a battery pack can be improved, and the service life of thebatteries is prolonged.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a method for rapidly sorting lithium ion batteries. Background technique [0002] Lithium-ion batteries have become the preferred power source for electric vehicles and energy storage due to their advantages such as high operating voltage, high energy density, small self-discharge, no memory effect, and high charge-discharge efficiency. In practical applications, single lithium-ion batteries are modularized and grouped through appropriate series and parallel connections, thereby increasing the voltage and capacity of the overall battery pack to meet the power requirements of various fields. In the process of grouping, if the performance of the single cells is quite different, it will affect the overall performance of the battery pack, greatly reducing the service life of the battery pack, and in serious cases, it will cause the problem of overcharging and over-disch...

AI Technical Summary

Problems solved by technology

In the process of grouping, if the performance of the single cells is quite different, it will affect the overall performance of the battery pack, greatly reducing the service life of the battery pack, and in serious cases, it will cause the problem of overcharging and over-discharging of the battery, resulting in safety hazards (such as explosions) etc.), therefore, the produced lithium-ion cells must be sorted consistently before being modularized into groups

However, the existing lithium-ion battery sorting method needs to manually observe the values ​​tested by different batteries and compare them one by one. This method is not only time-consuming and laborious, but also has the problem of low efficiency. At the same time, employees often misunderstand The sorting error caused by the eyes is not intuitive enough

As a result, the sorting efficiency of lithium batteries is low

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