Multi-point laser welding clamping device for battery pack busbar

Abstract

The invention relates to a multi-point laser welding clamping device for a battery pack busbar. The device comprises a bottom plate, an upper clamping plate and a lower clamping plate, wherein a vertical cylinder and a supporting plate are arranged at each of the left side and the right side of the bottom plate; each supporting plate is positioned at the inner side of the corresponding vertical cylinder; the left side and the right side of the lower clamping plate are respectively mounted on the two supporting plates, while the left side and the right side of the upper clamping plate are respectively mounted on the two vertical cylinders; the upper clamping plate is a laser welding type upper clamping plate capable of charging nitrogen; the lower clamping plate is a tray of which the left side, the right side and the rear side are provided with upward enclosing edges; a gap is formed in the front side edge of the tray; a horizontal cylinder to which a vertical baffle plate is connected is arranged at each of the lower left side and the lower right side of the tray, wherein the baffle plate is higher than the tray. The device is reliable to clamp and convenient to control; all welding parts on the busbar can be welded with laser, thus achieving multi-point welding; meanwhile, the nitrogen can be charged to the welding parts, so that welding points can be effectively prevented from oxidative blackening, and as a result, the welding firmness can be ensured, and the working efficiency can be improved.

Description

technical field [0001] The invention relates to the field of manufacturing electric vehicle battery components, in particular to a multi-point welding clamping device for laser welding of busbars of battery packs. Background technique [0002] With the worldwide energy shortage and environmental protection requirements, environmentally friendly and energy-saving electric vehicles have become the development direction of the automotive industry. The power source of electric vehicles is a battery pack composed of multiple lithium batteries connected in series and parallel. To conveniently realize series-parallel connection of batteries, it is necessary to weld the busbar and the electrodes of each lithium battery, and the busbar is composed of multiple nickel sheets welded to a parallel copper bar. , the area of ​​the bus bar is large, so the area of ​​the parallel copper bar used is large, and the number of nickel sheets is large. During the welding process, the position of t...

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Problems solved by technology

[0003] The invention mainly solves the technical problems that the nickel sheet is easily displaced, the solder joints are easily oxidized and blackened during the welding process of the original battery pack busbar, the welding firmness is not ideal, the welding quality is affected, and the work efficiency is reduced; a battery pack busbar is provided The laser welding multi-point welding clamping device has reliable clamping and convenient control. After the bus bar is clamped, laser welding can be performed on all welding parts on the bus bar to realize multi-point welding, and at the same time, the welding position can be connected to Nitrogen can effectively prevent solder joints from oxidizing and blackening, ensuring stronger welding and improving work efficiency

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