U.S. Solid USS-BSW07 Battery Spot Welder 21 KW 3500A Capacitor Energy Storage Pulse Welding Machine, Mini portable spot welding machines for 18650, LiFePO4 lithium battery pack construction.

"The redesigned U.S. Solid USS-BSW00007 high frequency inversion battery spot welder is equipped with two supercapacitors for energy storage and power supply for pulse welding. Unlike traditional bulky AC transformer spot welding machines, it is more portable and does not cause disturbances in the electrical circuit, eliminating triggering issues. Energy-efficient technology for millisecond pulse impulses maximizes the energy output of welding pulses on a millisecond timescale. The result is excellent weld spots without damage to the battery. 21KW/3500A super welding output - Supports the high-capacity current battery terminal welding. LED display screen and control buttons - Real-time capacitor voltage, power level, and actual welding current parameters are monitored. Adjustment of parameters can be conveniently made by pressing the buttons. 'AT/MT' Two welding modes - 'AT' automatic mode for fast welding and 'MT' foot pedal control mode for beginners or precise welding. Several welding tip accessories are available for different welding requirements. (Please note that the package only includes the standard 73B/75A welding tip for 18650/LFP lithium battery welding, additional purchase is required for other welding tips.) The newly added 'AL-NI' function in super power mode provides a maximum welding current of 3.5 KA. With it, pure nickel of 0.2 mm can be directly welded to the aluminum terminals of LiFePO4 batteries, saving you the high costs of using aluminum-nickel composite strips. Plug type: AC 100-240 V, 50/60 Hz, EU plug, Manual: EN/DE, bilingual."