Double-sided automatic spot welding machine control device and method

Abstract

The invention provides a double-sided automatic spot welding machine control device. A double-sided automatic spot welding machine comprises a left screw rod, a right screw rod and a jig used for assembling a cell. A left servo motor and a right servo motor are connected with the left and right screw rods respectively, a left spot welding head and a right spot welding head are connected on the left and right screw rods respectively, a left electrode bar and a right electrode bar are arranged on the left and right spot welding heads respectively, a level conversion device is connected with a PLC (programmable logic controller), the left and right spot welding heads are both connected with the level conversion device, and the PLC is further connected with the left and right servo motors; a contact position is arranged on the surface of the cell. The invention further provides a double-sided automatic spot welding machine control method. After the spot welding heads on both sides reach the contact position, the electrode bars on two sides contact with the cell, and then the spot welding heads reach the spot welding position, so that the cell cannot move and a nickel plate cannot be misplaced. By the device, spot welding quality is improved, the servo motors can be set to be in full speed operation during movement before contact with the cell due to the contact position, and thus spot welding efficiency is improved as well.

Description

technical field [0001] The invention relates to a control device and method for a double-sided automatic spot welding machine, which is used in the process of connecting a single battery cell through a nickel sheet to form a battery pack. The nickel sheet is welded on the surface of the battery cell to realize the series and parallel connection of the battery, and then the battery is formed. group, belonging to the field of automatic control technology. Background technique [0002] The structure of the double-sided automatic spot welding machine is as follows: figure 1 Shown, comprise left screw mandrel 2 and right screw mandrel 9, left servo motor 1, right servo motor 8 are connected with left and right screw mandrel respectively, left spot welding head 3 and right spot welding head 7 are connected with left and right wire mandrel respectively. On the bar, the left and right spot welding heads are respectively equipped with a left electrode rod 4 and a right electrode rod...

AI Technical Summary

Problems solved by technology

In the above process, due to mechanical processing, installation and other reasons, the distance between the electrode rods on the left and right sides of the spot welding machine and the surface of the battery cell will be different, which will cause the electrode rods on both sides to press the battery cell at different times.

The production of the jig does not hold the battery cell firmly, so the electrode rods on both sides do not press the battery cell at the same time, which will cause the battery cell to move, and the nickel sheet placed on the surface of the battery cell will also be misplaced, which will affect the quality of spot welding.

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