21700 Single Row Battery Fixture – DIY500AMP.COM Design
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Compact fixture for aligning and spot-welding 21700 cells. Perfect for single-row battery builds.
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Model information
- Source
- Printables
- Category
- Electronics
- License
- Creative Commons — Attribution — Noncommercial
This fixture is designed for 21700 lithium-ion cells used in DIY battery pack building. It provides precise alignment for single-row configurations, ensuring clean and accurate welding.
It’s the 21700 version of the original 18650 Single Row Fixture, with increased spacing to accommodate larger cells and magnets for easy setup.
Ideal for builders working with Molicel, Samsung, EVE, or Ampace 21700 cells, this design keeps cells stable during assembly and welding, helping achieve professional results.
Features:
Fits all 21700 cells (21mm x 70mm)
Perfect for single-row pack layouts
Integrated magnet holders for positioning (8x2mm magnets)
No supports required
Prints in under 1 hour
Lightweight and reusable
Recommended print settings:
Layer height: 0.2mm
Material: PLA+, PETG, or ABS
Infill: 30–40%
No supports required
Files included:
21700 Fixture with magnet holder.stl