[Eng sub] DIY- How to make a home use simple spot welder with car battery 

New: make a timer controlled spot welder • 【自作】DIYタイマー制御スポット溶接機を作...
I made a home use (not industry grade) spot welder.
The welder is capable of spot welding battery cells such as 18650 sized lithium-ion rechargeable battery with nickel strips.
★回路図(circuit diagram)
ichiken-youtube.hatenablog.co...
★ Used parts (including AMAZON Associate Link)
Deep cycle battery 12V (Alternative battery can be used) amzn.to/2CcaGoL
12V relay amzn.to/2V9jB2V
Pedal switch amzn.to/2VaYYTT
Electrode copper wire amzn.to/30Kh8Nr
Wire (Main circuit: 5.5 SQ or more recommended from battery to terminal block) amzn.to/2Ijg90y
Electric wire (5.5 SQ or more recommended from terminal block to welding target): SV cable
Nickel strip amzn.to/2Of3MX9
Soldering iron amzn.to/30goo8t
Crimping tool (for ring sleeve: used in the video) amzn.to/2V7ekJ8
Crimping tool (for crimping terminals: use this) amzn.to/33bo9sP
Heat gun (for heat shrinkable tube): amzn.to/2NLhPBJ
Lithium-ion battery: Buy it on Aliexpress and get it for about 20% of the price you buy in Japan.
Diode: Rated 20-30V 1A or more recommended
Terminal block (terminal): Large
Barrier connector