With the development of the electronics industry chain, there are more and more electronic products on the market, and their demand is gradually increasing. Spot-welded tabs and connectors on batteries are commonly seen, but it is rare to see tabs and connectors on 18650 lithium batteries. The spot welding of tabs on 18650 lithium batteries is both complex and simple. The function of the tabs and connectors is to connect and output the performance of the 18650 lithium battery, mainly applied in various lithium battery packs. So, what are the main methods for spot welding battery tabs and connectors? The following is byBattery tab manufacturerLet me tell you!

1. Press the power switch of the double-head pulse spot welding machine to the "On" position to turn on the power.

2. Confirm that all parameters of the battery equipment have been debugged. According to the parameter setting table on the right, prepare the materials and related tools.

Tools can include: double-head spot welding machine, tool holder, pressing fixture, hex wrench.

When debugging the parameters of the battery spot welding machine equipment, it is necessary to confirm with the quality engineering team and only operate if the requirements are met.

When spot-welding 18650 lithium batteries, attention must be paid to the spot-welding tensile force, which must be within the quality inspection range.

3. Pick up a battery with the negative bottom facing up, take a tab with the round-hole end outward, and spot-weld the tab to the middle position of the 18650 lithium battery's negative pole.

4. Turn the lithium battery pack over, with the lead tabs facing inward. Take a connecting tab and place it on top of the lead tabs. Spot weld the connecting tab in the middle position of the battery's negative pole, in line with the lead tabs.

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

6. Place the series-welded battery pack on the pressing fixture, apply force to press the battery pack toward the center so that the two batteries are tightly combined in a straight line.

7. After the pressed battery pack flows to the next workstation and operation is completed, clean the work surface and turn off the spot welding machine power switch.

Precautions for welding lead tabs and connecting plates of 18650 lithium batteries:

1. The specifications of the tabs must comply with the material BOM specifications.

2. The welds must not have issues such as missing welds, cold welds, sparks, or obvious burrs.

3. Each lead-out/connector should have no fewer than 6 solder points.

4. When working, the surface pad must not come off. If it does, it must be reattached before continuing work.

5. When the tip of the copper needle on the spot welding machine turns black, use a file knife to remove the black spots from the copper needle and then reperform the spot welding operation.

6. If the instrument emits smoke, makes abnormal noises, or other abnormalities, immediately turn off the power switch, stop the instrument's operation, and report to the supervisor.

The above is the method for spot welding battery tabs and connecting pieces that the editor has introduced to everyone. I hope that after reading it, it can be helpful to you. In fact, spot welding lithium battery tabs is quite similar to other spot welding processes. Some polymer lithium battery tabs also need to be spot welded with connecting pieces, and the principle of spot welding is largely the same. However, here at Battery Net, all issues are standardized, and the methods and precautions are very well addressed.