-Laser welding process of aluminum shell of power lithium-ion battery

Laser welding process of aluminum shell of power lithium-ion battery
author:enerbyte source:本站 click276 Release date: 2023-06-21 13:58:18
abstract:
Electric vehicles have been favored since their inception because they reduce emissions and achieve zero emissions. Electric vehicles rely on lithium-ion batteries for power supply, which are typically made of 3003 aluminum alloy. Aluminum batteries should be welded together to protect the int...

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Electric vehicles have been favored since their inception because they reduce emissions and achieve zero emissions. Electric vehicles rely on lithium-ion batteries for power supply, which are typically made of 3003 aluminum alloy. Aluminum batteries should be welded together to protect the internal electrode materials and prevent electrolyte leakage. However, the traditional welding packaging method can no longer meet the need of the rapid development of power batteries, and the laser welding technology has good adaptability to the aluminum shell of power batteries. What is the laser welding process for the aluminum shell of power lithium-ion battery?

Laser welding can be divided into side welding and top welding. The important advantage of side welding is that it has little impact on the interior of the battery and splashes are not easy to enter the interior of the battery casing.

Due to the possibility of protrusions during welding, which may have a slight impact on subsequent assembly processes, the side welding process has high requirements for laser stability and material cleanliness. However, due to the fact that the top welding process is welded on a single surface, there is a low requirement for the integration of welding equipment and mass production is simple. However, there are also two drawbacks, one is that there may be some splashing during the welding process of the battery, and the other is that the production requirements for the front of the aluminum shell of the power lithium-ion battery are high, which can lead to cost issues.

The most important process in the welding process of square batteries is the packaging of the shell, which can be divided into upper and lower cover welding according to different positions. Some power lithium-ion battery manufacturers use deep processing to process the aluminum shell of power lithium-ion batteries due to their small volume, so they only need to weld the top.

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