電子工作

21700 3S4P Battery Pack 3D Models for Printing

This collection brings together STL files for 21700 battery holders and pack cases, from compact 3S2P arrangements to larger trays and powerbank enclosures. You will find models for organizing cells, building custom packs, and housing electronics. Use these designs to print components that match your specific cell layout and project size. Polyzon does not confirm whether models are free, their price, license, official status, affiliation, safety or fitness. Check the current terms at the source.

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選定基準：Polyzon編集部 · 本文の更新日：2026年10月9日

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«21700 3S4P Battery Pack 3D Models for Printing»

Some models are simple cell spacers that keep 21700 batteries aligned in a 3S4P or 4S3P grid, while others are fully enclosed cases with lids for powerbank projects. You will also see adjustable trays that accept both 18650 and 21700 cells, plus compact frames designed for fewer cells in 3S1P or 3S2P setups. These differ in wall thickness, whether they include wiring channels, and how the cells are retained.

Before choosing a model, check the model page for the exact cell count and spacing, since a 3S4P holder for 21700 cells has different dimensions than one for 18650. Look at whether the design needs additional supports, which filament the author recommends, and if there are photos of real prints to verify fit. Also verify if the model includes a lid, mounting tabs, or space for a BMS and wiring.

If you need a different layout, try searching for related terms like 3S2P, 4S3P, 6S, or simply 21700 spacer. For broader results you can use battery tray, li-ion holder, or powerbank case, and narrow down by cell size or pack voltage. This helps find both bare spacers and complete enclosures that suit your project.

FAQ

よくある質問

What does 3S4P mean in a 21700 battery pack?
It means three cells in series and four in parallel, giving a nominal voltage around 11.1 V with increased capacity. The holder must fit twelve cells in that specific arrangement.
Can I use a 21700 holder for 18650 cells?
Some models are sized specifically for 21700 cells, while others have adjustable slots or separate versions for 18650. Check the author's dimensions and photos to see if your cells will fit securely.
What should I verify before printing a battery spacer?
Confirm the cell count and layout match your pack plan, and review whether the author lists recommended print settings or materials. Real-print photos help judge tolerances and fit.
Do these models include space for a BMS or wiring?
Some are bare spacers with only cell slots, while others are full enclosures with room for a management board, connectors, and wiring channels. The author's description usually shows which type is offered.
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