Cell short circuit testing device and testing method thereof as well as cylindrical cell piece production winder

Abstract

The invention provides a cell short circuit testing device and a testing method thereof as well as a cylindrical cell piece production winder. The cell short circuit testing device comprises a feedingline, a short circuit testing unit, a guide unit, a clutch unit and a reset unit; the feeding line comprises a transmission belt with a plurality of fixtures and a motor for driving the transmissionbelt to transmit; the detection end of the short circuit testing unit faces the feeding line; the guide unit is provided with guide rails; the short circuit testing unit is connected in a slidable mode to the guide rails; the driving end of the clutch unit is connected with the output end of the motor; the driven end of the clutch unit is connected with the short circuit testing unit; the clutch unit drives the short circuit testing unit to slide along the guide rails; and the reset unit is connected with the short circuit testing unit and drives the short circuit testing unit to slide along the guide rails. The invention further provides the testing method and the cylindrical cell piece production winder. The cell short circuit testing device and the testing method thereof as well as thecylindrical cell piece production winder all have the advantages of a cell short circuit testing device which is reliable to work and long in short circuit testing time on a cell.

Description

technical field [0001] The present invention relates to the technical field of battery production, in particular to a battery short-circuit test device, a test method for the battery short-circuit test device, and a cylindrical battery sheet winding machine equipped with the battery short-circuit test device . Background technique [0002] The core component of lithium-ion batteries is the battery cell, and the battery core is mainly made of positive pole pieces, negative pole pieces, and separators through multi-layer lamination or winding, and the technical problems that the battery cells have to face in actual production are : The diaphragm is damaged, the pole piece has burrs, etc. These problems are very easy to cause the positive pole piece and the negative pole piece inside the battery to have a short circuit due to direct physical contact, and this internal short circuit or micro short circuit will cause the cell to form a data Abnormality will greatly affect the pe...

AI Technical Summary

Problems solved by technology

[0003] However, the battery short-circuit test devices currently on the market all perform short-circuit tests on the battery through a separate detection cylinder, that is, a test rod set is set at the driving end of the cylinder, and when the battery on the conveyor belt passes the cylinder , the cylinder drives the test rod group at the driving end of itself to move to the tab of the battery cell, and conducts a short-circuit test on the battery cell to know whether there is a short-circuit problem in the battery cell

However, since the transmission efficiency of the transmission belt of the current battery short-circuit test device can reach 30 pieces per minute, the time for performing a short-circuit test on each battery cell is at most only 2 seconds, and these 2 seconds also need to include the transmission belt to the battery. The transportation time of the cell leads to the short-circuit detection time of the battery cell by the above detection method per unit time, generally only 0.5 seconds to 1 second

In the short-circuit test link, the short-circuit test time is the most important test index, which makes the above detection methods have problems such as poor detection accuracy and short detection time.

Images