How Does a Spot Welder Work? Review, Teardown and Analysis of a BIFRC DH20 Battery Spot Welder

In this video, I discussed the principle of operation of the BIFRC DH20 spot welder and demonstrated its capabilities. I also did a teardown and analysis of the unit. Product link: https://ban.ggood.vip/10GYB 00:00 Overview 04:59 Welding test with different settings/tips 08:22 Principle of operation 12:20 Output waveforms 15:52 Welding current measurement 19:13 Teardown 22:12 Conclusion More teardown pictures of the DH20: http://www.kerrywong.com/2021/12/10/how-does-a-spot-welder-work-review-teardown-and-analysis-of-a-bifrc-dh20-battery-spot-welder/ My MOT spot welder build: http://www.kerrywong.com/2017/06/18/dual-purpose-spot-welder-with-pulse-duration-control/ Battery bank build using my MOT spot welder: http://www.kerrywong.com/2017/09/22/building-a-12v-110ah-battery-bank-using-80-32650-lifepo4-cells/ More links from Banggood: Clearance sales https://bit.ly/30fp4MR Tools & Electronics sales: https://bit.ly/3caNiK9 New arrivals: https://bit.ly/3HhsQG7