Square aluminum shell battery cells require more support from laser welding technology for welding.
2021-06-21
The square aluminum shell battery cell is an important basic unit of power batteries. Due to the internal use of winding or stacking processes, its safety performance is higher compared to soft-pack battery cells and cylindrical battery cells, which is why its market usage rate is relatively high. However, the specifications of square battery cells vary greatly, and there is no industry standard. Therefore, the laser welding equipment required for welding each type of battery cell varies in power, parameters, hardware, and software configuration. The welding processes are also diverse. When users purchase equipment for welding the same product, the configurations, hardware quality, system performance, process level, service quality, etc., provided by different manufacturers are not the same, and the price can vary significantly. This is also determined by the product market positioning, user demand, and development pattern of the equipment manufacturers. For users, they need to weigh the pros and cons themselves; what suits them is the best choice!
Square battery cells can be divided into aluminum shell and steel shell. However, aluminum shells are more suitable for use in power battery PACK assembly due to their high hardness, light weight, and good safety. Each manufacturer can choose different specifications of square aluminum shell battery cells according to their needs. However, a noticeable drawback is that the PACK composed of square battery cells requires higher technical support for heat dissipation. This issue will be better resolved with the development of electronic technology in the future.
There are many areas that require welding for square aluminum shell battery cells, including pole welding, explosion-proof valve, liquid injection hole, aluminum block welding, multi-layer tab welding under the cover plate, cover plate welding, etc. Among them, the important welding area is the cover plate welding, which includes top welding and side welding. Both types of welding have their own advantages and disadvantages. The cover plate is inserted into the shell flush with the top, and then the rectangular gap between the cover plate and the shell is welded using a continuous laser method to achieve sealing. This welding process is called top welding. In top welding, the laser beam can remain stationary while the battery is fixed on the workbench. After aligning the laser beam with the weld seam, the workbench is activated to move the battery along the X and Y coordinates to trace out a rectangular shape identical to the weld seam. When using the top welding sealing structure process for the cover plate of square batteries, the cover plate is placed without positioning steps, and the size tolerance requirements are strict, requiring high welding assembly precision.
The welding process for aluminum shell battery cells varies among battery manufacturers and laser welding equipment suppliers. Especially for battery welding equipment companies, due to the need to improve welding processes, they often need to provide users with more welding auxiliary modules. For example, in the cover plate welding area, some manufacturers require the realization of automated production, automatic cover plate feeding, automatic fitting, welding, inspection, and finally unloading. This process requires more technical support, including mechanical control for feeding. Some manufacturers of laser welding provide visual positioning, post-weld visual inspection, and many other laser welding module supports. More importantly, you need a better laser welding system, as its stability determines the quality of your welding process. In this regard, it is still necessary to find manufacturers like SHINHOP Laser, which have rich experience in battery welding, because technical experience is also an important factor affecting the quality of battery welding processes.
Laser welding equipment, whether in production lines or standalone applications, offers convenience, high welding efficiency, reliable quality, and high benefits, meeting the trends of current and future battery manufacturing technology development. It is increasingly applied in the battery manufacturing field and has shown explosive growth in recent years. It is the future direction for replacing traditional welding methods. Therefore, whether it is cylindrical battery cells, soft-pack battery cells, or square aluminum shell battery cells, their welding manufacturing requires the support of laser technology equipment!
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.
Contact Us
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
Related News
2026-06-11
Contact Details
Hotline
Address
Building 4, Jingneng Technology and Environmental Protection Industrial Park, 3 Baolong 2nd Road, Longgang District, Shenzhen, Guangdong Province，China
YouTube
TikTok