Automatic positioning device for battery pack cover plate welding

Abstract

The invention discloses an automatic positioning device for welding a battery pack cover plate. The automatic positioning device comprises a double-crank rocker assembly, a positioning seat and a positioning block, the lower end of the double-crank rocker assembly is hinged to the bottom of one side of the positioning seat, a positioning groove for transversely placing the battery pack is formed in the upper end of the positioning seat, and a limiting through groove for vertically placing the battery pack is formed in the positioning block; one side of the upper end of the double-crank rocker assembly is connected with an upper pressing plate used for pressing the negative electrode ends of the transversely-placed and vertically-placed battery packs, and the other side of the upper end of the double-crank rocker assembly is hinged to a driving assembly used for driving the upper pressing plate to rotate towards the notch direction of the positioning groove. A side pressing plate is arranged on the side, away from the upper pressing plate, of the positioning groove, one side of the side pressing plate is connected with a pressing piece for pressing the positive electrode end of the vertically-placed battery pack, the other side of the positioning base is in threaded connection with a screw, one end of the screw is rotationally connected with the side pressing plate, the other end of the screw is connected with a rotating motor, and a lifting driving piece is installed at the lower end of the positioning base. The device has the advantages of being high in positioning and pressing efficiency, good in positioning and pressing effect and high in battery pack taking and placing efficiency.

Description

technical field [0001] The invention relates to the field of battery technology, more specifically, it relates to an automatic positioning device for welding battery pack cover plates. Background technique [0002] The battery pack is the main source of power for new energy vehicles. The battery pack needs to be welded during the production process, and it is particularly important to ensure the positioning welding of the negative end of the battery pack; existing battery packs such as figure 1 As shown, the multi-pole structure is mostly used. When packaging this battery pack, it is necessary to first compress the cover plate 43, the negative electrode current collector 44, the battery case 45 and the negative electrode sheet 46, and then press the cover plate 43 and the battery case. The gaps to be welded on the four sides between the bodies 45 are welded separately; due to the thickness deviation of the negative electrode current collector 44 in the production process, th...

AI Technical Summary

Problems solved by technology

[0002] The battery pack is the main source of power for new energy vehicles. The battery pack needs to be welded during the production process, and it is particularly important to ensure the positioning welding of the negative end of the battery pack; existing battery packs such as figure 1 As shown, the multi-pole structure is mostly used. When packaging this battery pack, it is necessary to first compress the cover plate 43, the negative electrode current collector 44, the battery case 45 and the negative electrode sheet 46, and then press the cover plate 43 and the battery case. The gaps to be welded on the four sides between the bodies 45 are welded separately; due to the thickness deviation of the negative electrode current collector 44 in the production process, the structural design of the cover plate 43 also has the situation of different thicknesses at different positions, while the existing welding positioning The size of the tooling is usually fixed, and the way to press the battery pack is usually to move a fixed plate to the battery case 45 at the negative end of the battery pack by the driver, and then tighten the bolts manually to secure the battery. The package is pressed in the welding positioning tool, and there is improper pressing or battery pack offset, which leads to poor positioning of the negative electrode current collector 44, battery case 45, cover plate 43, and negative electrode sheet 46. At the same time, the battery pack pick-and-place efficiency Low; in addition, the above-mentioned welding positioning tool can only position a single battery pack each time and position and compress the gap a47 to be welded on both sides of the same length. If it is necessary to position the gap b48 to be welded on the other side of a different length For compaction, another tooling needs to be replaced, and the thickness of the gap a47 or gap b48 after welding will be larger than that of the unwelded state. When picking up the material, the fixed plate is not used for translation and reset, resulting in low positioning and compacting efficiency. The problem of low efficiency of battery pack pick-and-place and poor positioning and pressing effect

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