18650 Battery Spacer Grid | Octagonal (8-28 Cells)
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Model information
- Source
- Printables
- Category
- Electronics
- License
- Creative Commons — Attribution
BOM: Printed with ROSA3D High Speed PLA Dark Blue
This is the "Powerhouse" edition of my octagonal battery holder system. These 4-row wide grids are designed specifically for large-scale energy storage projects, such as home powerwalls, solar accumulators, or high-performance EV battery packs.
Why use the 4-wide series?
Assembly Speed: Instead of gluing dozens of smaller holders, use these large blocks to rapidly assemble huge battery arrays.
Structural Integrity: A 4-wide block creates an incredibly solid core, keeping cells perfectly aligned under the weight of a large pack.
Octagonal Channels: In a dense 4-deep pack, airflow and wire routing are critical. The octagonal design ensures there is a gap between every single cell to prevent heat buildup and allow for BMS sense wires to pass through.
The Set Includes (Grid Sizes):
4x2
4x3
4x4
4x5
4x6
4x7
Printing Instructions:
Material: ABS, ASA, or PETG are mandatory. High-discharge packs generate heat that will deform PLA.
Fit: Designed for a secure friction fit.
Wall Count: Use at least 3 perimeters for maximum stiffness.