welding process
power battery from single cell to battery module, and then to battery pack, the welding process runs through the entire process. The electrode welding of the battery cell assembly of
, the shell and cover plate welding, the sealing nail welding of the liquid injection hole, the connection between the electrode columns between the batteries on the module, the pack connection sheet welding, etc. The quality of the welding process of
will affect the conductivity, airtightness, corrosion resistance and shell metal protection strength of the power battery, so this process is highly valued in the production of power battery.
welding detection requirements
Currently, aluminum alloy materials account for more than 90% of the shells of power batteries, while aluminum alloys have high reflectivity for laser , and are prone to defects such as pores, thermal cracks, and fire breaking during laser welding.
In addition, in extreme ear welding, defects such as dummy welding, desoldering, welding pores, and poor welding neatness are prone to occur. When welding the
module or Pack, the electrode column is easy to weld when it is thin, holes appear when there are contaminants, and defects such as the electrode column size is small and the welding deviation is biased.
Optical Solution
Telecentric lens
line scanning lens
line scanning light source
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