Battery tabs:Everyone has probably heard of it. It is an important component of a battery, and its conductivity is very strong. The manufacturing process of battery tabs is relatively special, and they play a significant role in many industry fields. With the continuous development of our technology, the performance of battery tabs has greatly improved. So, how should battery tabs be spot welded? What precautions should be taken during spot welding? Below, the editor brings you some knowledge in this area, hoping to provide a more detailed understanding of battery tabs.

The role of the lithium power battery tab and connecting piece is to assemble individual lithium power battery cells into a lithium power battery module through series and parallel connections. Lithium power batteries typically use spot welding for the tab and connecting piece. The methods for spot welding the tabs and connecting pieces of lithium power batteries are as follows:

1) Turn the power switch of the dual-head pulse spot welding machine to the "ON" position to turn on the power.

2) Confirm that all parameters of the lithium power battery equipment have been debugged, and prepare the materials and related tools according to the parameter setting table. When debugging the parameters of the lithium power battery spot welding machine, it must meet quality requirements before performing welding operations on vehicles. When spot welding lithium power batteries, attention must be paid to the spot welding tension, and the tension value must be within the quality inspection range.

3) Pick up a single lithium battery cell with the negative bottom facing up, take a tab, with the end with the round hole facing outward, and spot-weld the tab to the middle position of the battery's negative pole.

4) Turn over the lithium power battery cell, with the lead tab facing inward, take a connecting tab, place the connecting tab on top of the lead tab, and spot-weld the connecting tab to the middle position of the lithium power battery cell's negative electrode, aligning it in a straight line with the lead tab.

5) Pick up another lithium battery cell, with the negative bottom facing up, and spot weld the exposed end of the connecting strip of the first lithium battery cell to the middle position of the negative bottom of the second lithium battery cell.

6) Place the series spot-welded lithium battery cells on the pressing fixture, and press each lithium battery cell toward the center with force, so that the two lithium battery cells are tightly combined together, forming a straight line.

7) Remove the pressed lithium power battery pack from the pressing fixture and proceed to the next process, turning off the spot welding machine power switch.

When spot welding the tabs and connecting pieces of lithium power batteries, the following matters should be noted: 1) The specifications of the tabs and connecting pieces must comply with the material BOM specifications. 2) The weld spots should not have defects such as missed welds, weak welds, sparks, or obvious burrs. 3) Each weld spot on the tabs and connecting pieces should have no fewer than 6 points. 4) During spot welding operations, the pad should not fall off; if it does, the pad must be reattached before proceeding. 5) When the tip of the copper needle of the spot welding machine turns black, use a file to remove the black spots on the copper needle before resuming spot welding. 6) If the spot welding machine makes abnormal noises or exhibits other unusual phenomena, the power switch of the spot welding machine should be turned off immediately.

Generally, when we spot-weld battery tabs, there are still quite a few steps, and we hope everyone follows the operation manual correctly. Also, remember some precautions during spot welding, such as avoiding incomplete welds, cold solder joints, burrs, and other defects. Each weld on the battery tab should have no less than six points. If any abnormalities occur during the spot welding process, you should promptly stop and turn off the power.