Nowadays, electric vehicles basically use lithium batteries. You knowElectric vehicle battery connector plateHow is it connected? The lithium battery spot-welded tab is both complex and simple. The role of the tab and the connecting piece is to connect the lithium battery's performance for output, mainly reflected in various lithium battery packs. The main methods for spot-welding the tab and connecting piece are as follows:

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, and prepare materials and related tools according to the parameter setting table on the right. The tools that can be used include: double-head spot welding machine, files, lamination fixtures, hex wrenches. When debugging the parameters of the battery spot welding machine, confirmation with quality engineering is required, and operation is only allowed if the requirements are met. When spot welding 18650 lithium batteries, attention must be paid to the spot welding tensile force, and the force value must be within the quality inspection range.

3. Pick up a battery with the negative end facing up, take a lead tab with the circular hole facing outward, and spot-weld the lead tab to the center of the negative end of the 18650 lithium battery.

4. Turn the lithium battery pack over, with the tabs facing inward. Take a connecting piece and place it on top of the tabs. Spot-weld the connecting piece in the middle position of the battery's negative terminal so that it aligns in a straight line with the tabs.

5. Pick up another battery with the bottom of the negative terminal facing up, and spot weld the exposed end of the first cell's connector to the middle bottom of the bottom of the second cell's negative terminal.

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 spot welding the tabs and connectors of 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.

Regarding the precautions for starter tabs and linking tabs, it is not only the points mentioned above, but also when the tip of the copper pin of the spot welding machine turns black, use a file to remove the black spot on the copper pin before performing the welding operation again. If the machine emits smoke, makes abnormal noises, or other unusual conditions occur, the power switch should be turned off immediately, the machine should be stopped, and the supervisor should be notified. To learn more, you can continue to follow Wuxi Xindake!