CN204545705U - A kind of automatic laser end face welding equipment - Google Patents

Abstract

The utility model discloses an automatic laser end face welding equipment, which comprises a conveyor belt, positive and negative electrode calibration fixtures, positive and negative electrode laser probes, positive and negative electrode positioning fixtures, positive and negative electrode laser welding heads, and battery cell fixing grooves. Positive and negative electrode calibration fixtures, positive and negative electrode laser probes, positive and negative electrode positioning fixtures, positive and negative electrode laser welding heads are all installed on both sides of the conveyor belt, and the cell fixing groove is installed on the conveyor belt. Compared with the prior art, the automatic laser end face welding equipment of the utility model uses the laser probe to detect the position of the electric core, and then uses the servo motor to drive the clamp to clamp and then automatically welds by the laser welding head. The position of the battery cell is corrected accurately, and the welding is automated, which avoids the problems of low efficiency, many fault points, false welding, inconsistent production quality and other problems caused by manual intervention, thus ensuring the high efficiency and high quality of welding.

Description

An automatic laser end face welding equipment

【Technical field】

The utility model relates to the field of lithium battery manufacturing, in particular to an automatic laser end face welding equipment.

【Background technique】

There are many ways to increase the charge and discharge current of cylindrical lithium batteries, including improvements in materials, design, and technology. In terms of the production process of cylindrical lithium batteries, the most obvious method is to use end welding technology, which cancels the In traditional lithium batteries, the method of welding the tabs at different positions in the middle of the pole pieces to conduct current is to leave the foil on one side of the positive and negative pole pieces separately when coating them, and then pass through a period of time after the pole pieces are wound. After flattening the empty foil at both ends by this mechanism, laser welding is used to weld the two ends to the busbar respectively, and finally the busbar is welded to the steel shell and the cap by ultrasonic welding to conduct electricity. The key part of this process is The step of welding the two ends of the cell and the busbar with a laser.

The current traditional method is to manually place the flattened battery cell on the positioning fixture, lift the battery cell through the lower cylinder, and start welding after pressing the upper busbar. During the welding process, the laser welding head will follow the set Move in the direction to weld the required solder joint shape. However, this kind of laser welding needs to manually place the battery, and the positioning takes time. Only one end can be welded at a time. When welding the other end, due to the different materials, it is necessary to readjust and set the welding energy and welding position, and the overall welding efficiency is low; In addition, Due to the size tolerance of the battery cells, each time the cylinder is pushed by the same stroke, the degree of compression on different cells is different, which will lead to problems such as virtual welding, weld penetration, and inconsistent welding results.

In view of this, it is necessary to provide an automatic laser end face welding equipment to overcome the above shortcomings.

This patent uses an automatic laser detection and positioning system to determine the relative position of the two positioning fixtures each time according to the actual cell size, and then perform simultaneous welding of the positive and negative electrodes. This device can double the efficiency and ensure that the cell Consistency of welding quality between.

【Content of utility model】

The purpose of the utility model is to provide an automatic laser end face welding equipment, which not only improves the end face welding efficiency of batteries, but also ensures the consistency of welding process quality between batteries.

In order to achieve the above purpose, the utility model adopts the following technical scheme: an automatic laser end face welding equipment, which includes a conveyor belt, positive and negative electrode calibration fixtures, positive and negative electrode laser probes, positive and negative electrode positioning fixtures, positive and negative electrode laser welding heads , cell fixing slot, the positive and negative calibration fixtures, positive and negative laser probes, positive and negative positioning fixtures, positive and negative laser welding heads are installed on both sides of the conveyor belt, and the cell fixing slot is installed on the conveyor belt superior.

As an improvement of the automatic laser end face welding equipment of the present invention, the probe point of the laser probe is parallel to the internal positioning surface of the positioning fixture;

As an improvement of the automatic laser end face welding equipment of the utility model, the position of the positive pole positioning fixture remains unchanged, and the negative pole positioning fixture advances and retreats through the servo motor;

As an improvement of the automatic laser end face welding equipment of the present invention, the clamping and loosening of the positive and negative calibration fixtures are controlled by a cylinder;

As an improvement of the automatic laser end face welding equipment of the utility model, the two groove sides of the cell fixing groove are closed by a spring.

When the equipment is running, the conveyor belt will automatically transfer the battery cell after the end surface is flattened to the battery cell fixing groove of the conveyor belt, and the positive and negative electrode calibration jigs will first calibrate the position of the battery cell to ensure that the position deviation is not correct during detection. It will be too large; when the battery is sent to the laser probe station by the conveyor belt, the positive and negative laser probes respectively detect the position of the battery to ensure that the battery does not shift; when the battery moves to the welding station, the positive electrode The position of the positioning fixture remains unchanged, and the negative positioning fixture pushes the cell forward through the servo motor until the two ends of the cell are respectively fixed by the positive and negative positioning fixtures; after the fixation is completed, the positive and negative laser welding heads move to the positive and negative ends of the cell And wait for the positive and negative bus pieces to be welded after blanking. After the welding is completed, the laser welding head and the positioning fixture are released and withdrawn, and the battery is continuously fed into the subsequent process by the conveyor belt.

The beneficial effects of the utility model are: the position of the electric core is detected by the laser probe, and then the clamp is clamped by the servo motor and then automatically welded by the laser welding head. Low efficiency, many fault points, false welding, inconsistent production quality and other problems caused by manual intervention, thus ensuring the high efficiency and high quality of welding.

【Description of drawings】

Fig. 1 is the schematic flow chart of a kind of automatic laser end face welding equipment of the present utility model;

Fig. 2 is a schematic diagram of the positive busbar of an automatic laser end face welding equipment of the present invention.

【Detailed ways】

Please refer to Fig. 1, shown in Fig. 2, the utility model is further described below in conjunction with implementation case.

When the equipment is running, the battery cell 1 after the end surface has been kneaded and flattened is automatically transferred to the cell fixing groove 16 of the conveyor belt by the conveyor belt 10. The position is preliminarily calibrated to ensure that the position deviation will not be too large during detection; The position is detected to ensure that there is no displacement of the battery cell; when the battery cell 1 moves to the welding station, the position of the positive pole positioning fixture 13-a remains unchanged, and the negative pole positioning fixture 13-b pushes the battery cell 1 forward through the servo motor 15 until the battery cell 1 moves to the welding station. The two ends of the core 1 are respectively fixed by the positive electrode positioning fixture 13-a and the negative electrode positioning fixture 13-b; after the fixing is completed, the positive electrode laser welding head 14-a and the negative electrode laser welding head 14-b move to the positive and negative electrodes of the battery cell 1 The end faces are welded after the positive and negative busbars 20 are cut. After the welding is completed, the laser welding heads 14-a, 14-b and the positioning fixtures 13-a, 13-b are released and withdrawn, and the electric core 1 is continuously sent into the following process by the conveyor belt.

The utility model is an automatic laser end face welding equipment, which is not limited to the description in the description and the implementation, so those who are familiar with the field can easily realize other advantages and modifications, so without departing from the claims and the equivalent scope Without limiting the spirit and scope of the general concepts defined, the invention is not limited to the specific details, representative apparatus, and illustrative examples shown and described herein.

Claims (5)

1. A kind of automatic laser end face welding equipment, it comprises conveyer belt, positive and negative pole calibration jig, positive and negative pole laser probe, positive and negative pole positioning fixture, positive and negative pole laser welding head, cell fixing groove, it is characterized in that: all The positive and negative calibration fixtures, the positive and negative laser probes, the positive and negative positioning fixtures, the positive and negative laser welding heads are all installed on both sides of the conveyor belt, and the cell fixing slots are installed on the conveyor belt. 2 . The automatic laser end face welding equipment according to claim 1 , wherein the probe point of the laser probe is parallel to the internal positioning surface of the positioning fixture. 3 . 3. An automatic laser end face welding device according to claim 1, characterized in that: the position of the positive pole positioning fixture remains unchanged, and the negative pole positioning fixture advances and retreats through the servo motor. 4. An automatic laser end face welding equipment according to claim 1, characterized in that: the clamping and loosening of the positive and negative calibration jigs is controlled by an air cylinder. 5 . The automatic laser end face welding equipment according to claim 1 , wherein the two groove sides of the cell fixing groove are closed by springs. 5 .