My Homemade Battery Spot Welder

In summary, this is a homemade construction that allows for safe connection of various rechargeable batteries. It requires a car battery with a capacity between 35-44 Ah, a strong relay from a scooter, motorbike, or car, and electrodes made of bronze or copper. A small switch is also needed to close the circuit, and care must be taken not to push the electrodes too hard on the battery to avoid damage. This method is faster and better than using a soldering iron, but safety goggles should still be worn. Metal accessories should not be worn during welding.
  • #1
mariost
5
0
A very useful homemade construction. We can safely connect all kinds of rechargeable batteries. We need a car battery between 35-44 Ah (Here the battery is 100 Ah but we don't need so much current) , a strong relay from a scooter or a motorbike or from a car ( the ignition relay) . The electrodes must be from bronze or from copper. We also need a small switch to give in an instant the order to the relay to close the circuit. We must push the electrodes on the battery but not very hard to not destroy it. The batteries don' t become so hot because the time we need to weld is less than 1 sec. This method is much better than to weld with soldering iron, witch makes all the area very hot. Take care of your hands to not burn them. Rings , bracelets and other metal accessories are forbitten to wear during the welding.
YOU CAN WATCH THE COSTRUCTION HERE.
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  • #2
Do you need to wear dark glasses when using this, the way you do for a regular welder?
 
  • #3
phinds said:
Do you need to wear dark glasses when using this, the way you do for a regular welder?
No there is no arc but of course you do want regular safety goggles.. I had not considered the ring issue...yikes!

[Moderator: side comment removed.]
 
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1. How does a homemade battery spot welder work?

A homemade battery spot welder works by using a high current flow from a battery to create a strong electrical current between two metal surfaces. This current creates enough heat to melt the metal and fuse the two surfaces together, creating a spot weld.

2. What materials do I need to make a homemade battery spot welder?

To make a homemade battery spot welder, you will need a battery, copper wire, a switch, and two metal surfaces to weld together. You may also need additional materials like a soldering iron, solder, and insulating materials depending on the specific design of your welder.

3. Is it safe to use a homemade battery spot welder?

As with any DIY project, safety is a top priority. It is important to take proper precautions when using a homemade battery spot welder, such as wearing protective gear and ensuring all connections are secure. It is also important to have a good understanding of how the welder works and to follow proper procedures when using it.

4. Can I use a homemade battery spot welder for all types of metals?

A homemade battery spot welder is typically best suited for welding thin metals, such as sheet metal or wire. It may not be powerful enough to weld thicker metals. Additionally, certain metals may require different levels of current and heat to create a strong weld, so it is important to research and test the welder on different materials before using it on a project.

5. Are there any alternatives to using a homemade battery spot welder?

Yes, there are other options for spot welding, such as using a commercial spot welder or using a different welding technique, like gas welding or arc welding. However, a homemade battery spot welder can be a cost-effective and convenient option for small DIY projects or for those who do not have access to other welding equipment.

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