Affordable DIY Spot Welder for Battery Packs

Hey everyone! Welcome to our latest blog post, where we will be discussing an affordable and efficient spot welder for those of you who are into DIY 18650 or 21700 battery projects. This spot welder is a game-changer for the DIY battery community, and we're excited to share it with you. We'll also show you how it works and the impressive results it can produce. Don't forget to watch the accompanying video for a detailed demonstration of the spot welder in action!

The spot welder we're talking about is a compact, well-designed device that can be purchased on Amazon for less than 25 dollars. It is similar to the K-well PCB spot welder but comes at a much more affordable price. The device has six MOSFETs and is extremely easy to use, making it perfect for those looking to create their own battery packs.

Safety Features:

One of the best aspects of this spot welder is its safety feature – it turns off automatically when not in use. This is a great addition for those who are worried about accidentally leaving the device on and causing potential harm.

Building a Battery Pack:

In our video, we demonstrate how to use the spot welder to build a 7S 7P battery pack made from 21700 lithium cells. These cells were sourced from Battery Hookup and provide a total power output of around 900 watts. This battery pack was created as a backup for use during power outages caused by Hurricane Fiona.

Using the Spot Welder:

To use the spot welder, simply place your nickel strip onto your battery cells and press the welding probe onto the strip. The spot welder will automatically detect the closed circuit and create a solid weld in a matter of seconds. The resulting welds are clean and strong, ensuring that your battery pack will hold together even under stress.

Adding an Extra Layer of Safety:

When building batteries with recycled cells, it's important to add an extra layer of safety to prevent potential issues. We recommend using 32-gauge bus wire to create fuses for each cell, connecting them to a main bus bar. This can be easily done with the spot welder and provides an extra layer of protection for your DIY battery pack.

Conclusion:

This affordable spot welder is an excellent addition to any DIY battery enthusiast's toolkit. It's easy to use, safe, and produces clean, strong welds that will keep your battery pack secure