Cell module BUSBAR welding robot and machining method thereof

Abstract

The invention discloses a cell module BUSBAR welding robot and a machining method thereof. The welding robot comprises at least one false welding prevention device and a welding device, wherein the false welding prevention devices limit cell modules with BUSBARs in a welding position, and enable at least electrode part of each cell in the cell module to tightly bond with the BUSBARs in a self-adaption manner; and the welding device at least can perform a reciprocating motion in a first direction and a second direction, and adopts non-contact welding to realize connection between the cell modules and the BUSBARs. The welding robot can perform self-adaption adjustment according to the fitness between the electrodes of each cell and the BUSBARs through a set of extension columns, so that theelectrodes of each cell are tightly bonded with the BUSBARs, the false welding condition during welding can be effectively prevented, and the welding quality is fully guaranteed; and meanwhile, the non-contact welding mode is adopted without considering adverse effect on the welding quality from the factors of welding voltage, welding pressure, welding needles and the like, so that the welding process is easy to control, the automation degree is high, the welding quality is stable, and the efficiency is high.

Description

technical field [0001] The invention relates to the field of battery module processing equipment, in particular to a battery module BUSBAR welding robot and a processing method thereof. Background technique [0002] In the production process of new energy battery packs, it is usually to assemble multiple cells together and realize the connection between the electrodes of the cells through BUSBAR. of welding. [0003] In the process of resistance welding, there are several factors that are crucial to welding quality: welding discharge voltage, welding pressure, welding pin of the welding head, which are basically not detected and controlled in the existing welding process. [0004] The welding voltage and welding current of the existing resistance welding machine have no feedback monitoring, and the welding head generally uses a compression spring, and the compression amount of the spring and the failure of the spring are not controlled; the welding pressure is unstable, and...

AI Technical Summary

Problems solved by technology

[0004] The welding voltage and welding current of the existing resistance welding machine have no feedback monitoring, and the welding head generally uses a compression spring, and the compression amount of the spring and the failure of the spring are not controlled; the welding pressure is unstable, and there is no monitoring for missing welding and wrong welding , or can only be manually inspected offline, software programming is cumbersome and inefficient

[0005] In addition, the key factor affecting the welding quality of the resistance welding in the resistance welding process of the cell module is the surface quality of the welding needle, including the wear and cleanliness of the welding. Melting at high temperature, the molten material will stick to the welding pin, especially in the case of continuous welding in large quantities, the surface of the welding pin will be slowly covered by the molten welding material, and at the same time it will be dirty. Abrasion, dirt or sticky foreign matter, resulting in poor welding, or even false welding

[0006] At the same time, in the welding process of the existing battery module, the coordinates of the input solder joints are used for welding. Since there are many solder joints on the battery module, if the coordinates are input, the programming is more complicated and error-prone

[0007] Finally, during welding, when the cells are assembled together, there is often a certain height difference between the electrode surfaces of each cell, which leads to the incomplete fit between the electrode surfaces of some cells and the BUSBAR, resulting in virtual welding. The occurrence of the problem that can easily lead to connection failure

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