A laser welding machine (HP-DC568) used for welding the square battery terminals and aluminum to nickel busbars in automobiles.
2019-11-20
The laser welding machine for battery terminals and aluminum to nickel is commonly used in the welding production of cylindrical batteries, square aluminum shell batteries, or soft-pack batteries, especially in power square aluminum shell batteries, which have more welding components and varying welding process requirements. We know that square batteries, in addition to the cover plate sealing welding, also require welding of explosion-proof sheets, explosion-proof sheet brackets, flip sheets, and aluminum to nickel terminals. Therefore, their materials and specifications are not the same, and the laser power and fixtures used also differ. To weld square battery cells well, there is a certain technical difficulty. Different laser equipment manufacturers have varying technical experiences, and it is this aspect that better reflects the technical strength and professionalism of each manufacturer. Below, we will discuss a laser welding machine from SHINHOP for terminals and terminal aluminum to nickel.
The quality of the battery cell affects the overall quality of the battery pack, and even a problem with one cell can lead to the entire pack being scrapped. Therefore, when laser welding battery cells, it is necessary to ensure the uniformity of welding quality, which is just one of the reasons related to cell quality issues. When battery manufacturers assemble battery modules, they need to select the uniformity of the cell quality, including consistency in current, resistance, capacity, specifications, etc.
The terminal laser welding machine needs to differentiate the materials used for terminal welding. We know that the positive electrode of square batteries is generally made of aluminum, while the negative electrode uses copper-aluminum/aluminum-nickel composite materials, both of which are T-shaped. The small holes in the aluminum block on the top plate need to be aligned and embedded for welding. Therefore, we use a 2KW pure fiber laser for welding. The welding system equipped with negative energy feedback and visual positioning can achieve balanced energy output. Combined with the flexible operation mechanism of the X, Y, and Z axes, it can ensure the consistency of laser welding quality. You may ask why the negative terminal ear requires aluminum material when nickel material is sufficient. In fact, due to the large output/input current of power batteries, especially for automotive power battery cells, nickel terminals are generally not reliable. On the contrary, the negative terminal of power battery square cells is usually made of copper-aluminum composite materials, which means the T-shape on the terminal has a bottom made of purple copper or copper alloy, while the upper cylindrical material is made of aluminum. Therefore, whether it is the positive or negative terminal, it becomes a material of aluminum block. When we perform module soft connections or busbar welding, we need to weld them. The materials for soft connections also vary, including aluminum, nickel, copper, or their composite materials. Relatively speaking, the thickness of such soft connections can generally reach 1MM-2MM (small battery pack connection pieces are generally less than 1MM). Laser welding requires penetration welding, combined with a negative feedback system, to ensure smooth weld points, flat weld spots, and uniform color. The SHINHOP square battery terminal laser welding machine and terminal aluminum to nickel, soft connection busbar laser welding machine can achieve the conversion between pulse spot welding and continuous welding!
[This article is original by "SHINHOP Laser Equipment" and is for reference and learning only. It must not be reproduced/copied to avoid unnecessary legal liability issues.]
About Us
Shenzhen SHINHOP Laser Equipment Co., Ltd. It is a scientific and technological enterprise specializing in the research and development, production and sales of industrial laser processing equipment. It has been deeply engaged in the new energy industry for 20 years, focusing on the non-standard customization of automatic lithium battery cell assembly line and module PACK production line. It has successively obtained the national high-tech and specialized new enterprise certification.
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Company Address：Building 6, Jingneng Science and Technology Environmental Protection Industrial Park, No.3 Baolong 2nd Road, Longgang District, Shenzhen City, Guangdong Province
Customer service hotline:18898357350
Customer service E-mail:info@shinhop.com
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2026-06-11
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