Lithium battery core sorting device and sorting method

Abstract

The invention discloses a sorting method of a lithium battery core sorting device. The method is characterized in that the sorting device comprises a feeding mechanism, a detection mechanism, a material gathering and conversion mechanism and a sorting mechanism, wherein the feeding mechanism comprises the feeding fixing block and a feeding passage; the detection mechanism comprises a detection turntable; a plurality of battery core tubes are uniformly distributed on the detection turntable; each lithium battery core is erected on a conveying belt by the material gathering and conversion mechanism; the sorting mechanism comprises a main sorting passage, two first branch sorting passages and a first pulling plate. The sorting method comprises the following steps that the lithium battery coreis put into a blanking passage; a test disc intermittently rotates, so that the lithium battery core falls into a battery core groove formed in the test disc; an electric test assembly is subjected to electrical parameter test; the tested lithium battery is erected on the conveying belt; the lithium battery core enters the main sorting passage; the first pulling plate rotates; the lithium batterycore enters one first branch sorting passage. The sorting method of the lithium battery core sorting device provided by the invention has the advantages that the automatic sorting of the lithium battery cores is realized; the sorting efficiency is improved.

Description

technical field [0001] The invention relates to the field of lithium batteries, in particular to a sorting method of a sorting device for lithium batteries. Background technique [0002] As a new type of energy storage device, lithium batteries have attracted more and more attention because of their advantages such as high specific energy, high specific power, high working voltage, low self-discharge, good cycle performance and friendly manufacturing environment. At present, in the lithium battery production industry, it is common for the charge and discharge performance, cycle life and safety performance of a single lithium battery to meet the industry, national and international industry technical standards. However, once multiple lithium batteries are combined in a certain way (such as series) use, due to the difference in the consistency of the manufacturing process of each lithium battery cell, its technical parameters (voltage, capacity, internal resistance, etc.) do n...

AI Technical Summary

Problems solved by technology

At present, in the lithium battery production industry, it is common for the charge and discharge performance, cycle life and safety performance of a single lithium battery to meet the industry, national and international industry technical standards. However, once multiple lithium batteries are combined in a certain way (such as series) use, due to the difference in the consistency of the manufacturing process of each lithium battery cell, its technical parameters (voltage, capacity, internal resistance, etc.) do not match, which further causes the ohmic polarization impedance inside the battery and the transmission impedance of the participating battery reaction substances If the difference is too large, it will inevitably occur that when the battery pack is working, the real-time voltage distribution of each lithium battery cell will be uneven, resulting in overcharging or overdischarging, resulting in deterioration of the battery pack's performance, such as a decrease in capacity, a sharp decline in cycle life, and even worse. It will even affect the safe use of lithium batteries and other issues

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