Experimenting with a new (and probably flawed) 18650 building method: No soldering or spot welding! @TeachingTech
Experimenting with a new (and probably flawed) 18650 building method: No soldering or spot welding!  @TeachingTech
Uploaded May 2024 | Updated September 2026, 2 weeks ago
Check out my 2nd channel, TT Racing: youtube.com/@TTRacingYT

Previously I enjoyed building a custom 18650 battery for my portable Monoprice Mini delta 3D printer. And then some of the cells failed, limiting overall voltage and making my charger unhappy. I wanted to build a replacement that is serviceable, as a trial run for a much bigger, more expensive and powerful battery I’ve had planned for way too long. In this video, I present you with my experimental build and how I have tried to solve some problems with this approach.

This is not intended as a guide! This method is currently unproven.

My MPMD no longer uses a heated bed, so this battery will have a very easy life. The future battery however, has 320 cells configured to produce 72V and a lot more current. Please help me refine the concept in readiness for that.

0:00 Introduction

0:51 The traditional way
Previous 18650 battery building video: youtu.be/tKg-jIrr_JE

2:28 The problem

3:28 My ‘new’ concept
Vruzend: vruzend.com
Camping powerbank video: youtu.be/6b0nyNW4YMo

5:34 Ampacity
Calculator: electrical4u.net/calculator/busbar-current-calculator-online

6:27 Solving terminal contact consistency
MG Chemicals 847: mgchemicals.com/products/grease-for-electronics/electrically-conductive-grease/conductive-paste
8481: mgchemicals.com/products/grease-for-electronics/electrically-conductive-grease/conductive-grease
846: mgchemicals.com/products/grease-for-electronics/electrically-conductive-grease/carbon-conductive-grease

8:21 Design and Manufacture
Kiri:Moto: https://grid.space/kiri/
Purchase the Carvera CNC (affiliate): bit.ly/3CVfsq3
Use code 'TeachingTech' for a small discount.

9:44 Assembly

11:58 Evaluation and future tweaks

13:49 Conclusion

Green tick used in thumbnail: commons.wikimedia.org/wiki/File:Green_tick.svg

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Experimenting with a new (and probably flawed) 18650 building method: No soldering or spot welding!

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