Big God hard nuclear DIY capacitive spot welder: use super capacitance or power lithium battery, which effect is better?

Today, let's take a look at the hard-working gas-type spot welder. What is the electric welding machine? The spot welding machine system uses the principle of double-sided double-point overcurrent welding, and the two electrode pressurized workpieces in operation cause the two metal to form a certain contact resistance under the pressure of the two electrodes, and the welding current flows from an electrode through another electrode. When the two contact resistance points form an instant thermal fusion, and the welding current is instantaneously flows from the other electrode to the electrode to the electrode forming loop, not hurts the internal structure of the soldering device. The capacitive spot welder is actually a small power toll welder without the electrode. The principle is simple, and the capacitor is fully charged, and then the small workpiece is discharged from the welded portion. The spot welder is a high-temperature electric arc generated by a positive and negative bipolar short-circuit when short-circuited, and the solder material is melted on the welding body, so that the object is combined with the contact. Its structure is very simple, it is a high power transformer. In general, personal DIY uses two Falad capacitors of 2.7-2.8 volts, 5.4 volts, and outputs the termination controller, and the copper welding wire, copper welding pen, and copper welding pen can be too large. So we prepare two 2.7V 3000F supercapacitors, a pair of point soldering strokes, 3mm copper wire, heat shrink tube, insulating tape, etc. Let's take a look at this pair of spot welding strings, 12 yuan pair, very good. Because there is not enough soft copper wire, it can only be used with 3mm copper tubes, which is relatively hard. Use a copper pipe to prevent short circuit with a copper pipe. Then the point solder stroke and the copper pipe are welded together. Wrap the electrical insulation tape to prevent short circuits. Basically, it is basically a simple thing and principle that is very simple. If there is condition, you can add a control panel. After the production is completed, charging is performed, using a regulated DC adjustable power source because the capacitor is 2.7V, which is very dangerous, so the charging voltage is set to 2.6V. After half an hour, the charging is over. Let's find a tin plate test. It can be seen that the effect is still quite good, that is, the current is a bit big, so there is a control board better. Let's take a point to try it. The effect is as shown. After the spot is welded, the pen is a bit fever, and this homemade electric welder is a successful production. The energy storage elements used in the production of storage energy, but also use power lithium batteries, but it feels not safe. Once the case of the adhesive needle MOS short circuit is not good, there are many netizens to use multiple small capacitors. In parallel, I feel that the welding is too trouble, so it is also the most convenient to use the super capacitor. Content source: Xiao Zhou repair machine, is published by the circuit city editor, please indicate the source!