Clamp for battery laser welding

Abstract

The invention discloses a clamp for battery laser welding. The clamp comprises a positioning jig and a clamp body. The positioning jig hollowly forms positioning grooves and clamping positions, wherein the positioning grooves are used for containing battery cores, one end of each positioning groove is opened, and each clamping position is located on the opened side of the corresponding positioning groove and used for containing PCM boards. The clamp body comprises compressing positioning assemblies, a fixing plate, a positioning base, linear driving devices and a mounting plate, wherein the positioning base, the linear driving devices and the mounting plate are fixedly connected with a laser-beam welding machine. The positioning base is provided with a positioning interval used for containing a positioning jig, and the linear driving devices are located between the positioning base and the mounting plate and are provided with output ends which slide up and down. The fixing plate is fixed at the upper end of the mounting plate. Each compressing positioning assembly comprises a mounting base, an elastic piece and a pressing pawl. The mounting bases are arranged on the mounting plate in an up-down sliding mode, the elastic pieces are arranged between the mounting base and the fixing plate, and the pressing pawls are mounted on the mounting base and are provided with butting parts with through holes. In the compressing process of the clamp, only the linear sliding movement is made, positioning is accurate, welding quality and final product performance can be improved, the clamp is divided into two parts, and thus operation is made easier.

Description

technical field [0001] The invention relates to the technical field of fixtures for battery products, in particular to a fixture for laser welding of batteries. Background technique [0002] In the production process of mobile phone batteries, it is necessary to weld the tabs of the battery cell and the PCM board (protection plate). This welding process is one of the most important links in the battery production process, and its welding quality has a great impact on the performance of the final product. In the welding process, it is necessary to use fixtures to position and fix the tabs of the battery cell and the PCM board. [0003] The existing laser welding jig has two grooves for accommodating electric cores formed in a concave manner on its top surface, and the same ends of the two grooves are respectively formed with clamping positions for accommodating PCM boards, and two respectively are installed on the jig. The quick flip clamp corresponding to the two grooves, o...

AI Technical Summary

Problems solved by technology

[0004] 1. There is a deviation in positioning: the fixture uses a quick-turning clamp to press and position. When pressing down, due to the structural defect of the quick-turning clamp itself, it will shake left and right. After pressing down, the pressure claw will deviate from the predetermined position, that is, it cannot be accurate. Positioning at the welding position may cause the pressure claw parts to block the laser spot, resulting in insufficient welding at the welding position between the tab and the PCM board, which will eventually affect the character and quality of the finished battery; 2. Uneven force: the rapid flip clamp of the existing fixture The fixed block on the top is equipped with two pressing claw parts. When pressing down, there is a hidden danger of pressing on one side but there is a gap on the other side, and the welding position between the unpressed tab and the PCM board will be weak and easy to fall off. 3. The operation steps are cumbersome: firstly, the battery cell and the PCM board should be put into the groove and the card position respectively, and then the quick flip clamps are respectively laid down, and the quick flip clamp drives the pressure claw to press down and fix the battery cell The welding position of the tab and the PCM board, and then align the bottom hole of the fixture to the positioning column on the laser welding machine tool and perform welding. After the spot welding is completed, first take out the fixture from the laser welding machine tool, and then open the quick flip clamps respectively , take out the two battery components that have completed the welding process. The operation steps of this process are relatively complicated, and the labor hours are high, which affects production efficiency.

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