12V Spot Welding Machine DIY Portable

Features:

• There is a window on the back of the drive part, you can add copper or tin by yourself.
• The external pads for the LED and the on-board buttons are added to facilitate the connection between the LEDs & buttons on the board and other places.
• The upper and lower MOS design is bold and tinned to make the internal resistance smaller and the current stronger.
• Using 25V low internal resistance and high frequency capacitors make the power supplies more stable.
• Switch Function: press the switch for 1.5 seconds (green light flashes, low power spot welding pulse is output every 3 seconds); press the switch for 1.5 seconds (the blue light flashes and the medium power spot welding pulse is output every 3 seconds); press the switch for 1.5 seconds (red light flashes, high power spot welding pulse is output every 3 seconds); press the switch for 1.5 seconds to turn off the machine.
• This automatic trigger spot welding machine can weld nickel plating (0.1mm~0.15mm) of 12V lithium batteries and nickel-chromium batteries with a 90A~150A welding current.
• The following battery pack can be used as working power supply: the battery pack that can start the car can basically meet the power supply demand of this circuit, such as 12V car starting power supply, aeromodelling 3S high-rate battery pack, 3-string high-rate lithium battery pack, 12V 20A lead-acid battery with good performance, etc.

Specifications:
Material: PCB
Color: Black
System Voltage: 12V~14.6V
Working Current: 90A~150A
Suggested Battery (NOT included): 
20~45ah lead-acid battery with good performance and low internal resistance
3.5~5.5ah 45C 3S aeromodelling lithium battery pack
30~35ah capacity 18650 battery pack
Suitable for 18650 / 26650 / 32650 lithium battery
Package Size: Approx. 190*110*30mm / 7.48*4.33*1.18in
Package Weight: Approx. 200g / 7.05oz

Note:
Spot welding is based on local rapid heating and cooling with large current, which requires sufficient current supply. Generally, the welding current of 0.1mm~0.15mm nickel plated sheet is about 90A~150A, so the working power supply of circuit board must be greater than or equal to 150A.

Packing List:
1 * Main Circuit Board
2 * Input Wire
2 * Output Wire with Welding Pen
1 * Welding Components Kit (tin straps + nickel sheets + copper insert ears + screws + heat shrinkable tubes)