The welding of power battery shell can be mainly divided into two kinds, which are side welding and top welding. These two have their own advantages and disadvantages, because of the particularity of power battery aluminum shell material, easy to appear bulge, porosity and other problems.

Side welding and top welding process:

Side welding technology has higher requirements on the stability of laser, the cleanliness of material and the fit gap between the top cover and the aluminum shell of power battery. In the top welding process, because the welding is on the same surface, more efficient galvanometer scanning welding can be adopted, but it has high requirements on the shell entry and positioning of the previous process, as well as high automation requirements of the equipment.

So what are the technical difficulties of power batteries? Today we will answer your questions!

First, power battery aluminum shell welding difficulties

Power aluminum shell battery in the whole power battery market accounts for more than 90%, manufacturers mainly manufacture 0.6mm and 0.8mm thickness of the battery shell. As we all know, the laser welding of aluminum shell will be relatively difficult, welding will appear welding surface bulge, porosity, fire, internal bubbling and other problems, among which the surface bulge, internal bubbling problem is the most troublesome.

Because of this series of reasons, the seat in the power battery welding, welding technicians will choose the appropriate laser and welding process parameters (such as: welding speed, waveform, peak value, welding head inclination Angle, etc.) according to the customer's battery material, shape, thickness, tension requirements, to ensure that the final welding results can meet the perfect requirements of the power battery manufacturers.

Two, the welding difficulties of square power battery

Square batteries are most prone to problems in corner welding, which requires constant improvement through trial and error.

The difficulties of power battery at the present stage have not been solved, but with the progress of The Times and the development of technology, I believe that it will be able to break through the welding difficulties one day.