The utility model relates to the technical field of batteries, and discloses a sealing nail
welding line which is characterized in that a nail feeding device is used for mounting a sealing nail to one end, provided with a
liquid injection hole, of a cylindrical battery, a pre-
welding device is located at the downstream of the nail feeding device and used for pre-
welding the cylindrical battery, and a full-length welding device is located at the downstream of the pre-welding device and used for full-length welding of the cylindrical battery. The dust removal device is located at the downstream of the full welding device and comprises a sealing cavity, a dust removal
nozzle arranged in the sealing cavity and a negative pressure suction part located above the sealing cavity, the dust removal
nozzle is used for blowing the end face of the side, provided with the sealing nails, of the cylindrical battery, the negative pressure suction part is used for sucking flying dust in the sealing cavity, and the detection device is located at the downstream of the dust removal device. And the detection device is used for detecting and calibrating the cylindrical battery subjected to full-length welding. Therefore, the influence of welding
slag and
smoke dust on the detection structure of the detection device can be reduced, the detection precision is improved, the
false detection probability is reduced, the cost waste and the production takt
time loss are reduced, and the production efficiency is further improved.