DIY Triangle E-Bike Battery Case Enclosure with Cell Brackets – Fits 80 PCS 21700 Cells for 36V, 48V, 52V, 60V & 72V Custom Lithium Battery Builds

Build a high-capacity, heavy-duty custom lithium battery pack tailored specifically to your electric bike’s frame. This empty triangle battery enclosure is engineered for DIY builders, bike shops, and custom EV enthusiasts looking to assemble a custom power core using modern, high-energy-density 21700 lithium-ion cells.

Equipped with dedicated cell bracket spacers, this housing accommodates up to 80 individual 21700 cells, allowing you to configure high-voltage, high-amp-hour setups ranging from 36V up to 72V. The rugged plastic shell protects your soldered or spot-welded nickel strip matrix from frame vibrations, trail impacts, road debris, and weather exposure while maintaining a clean, integrated triangle-frame aesthetic.

⚠️ Important Fitment & Sizing Notice

Before Purchasing: This is an empty DIY battery box enclosure with internal brackets (battery cells, BMS, nickel strips, and wiring harnesses are not included). Please carefully measure your bike frame's internal triangle dimensions and review the detailed inner size diagram to confirm proper fitment for both your frame and your planned cell matrix layout.

🚀 Key High-Performance Features

• High-Capacity 80-Cell Layout: Optimized internal cell grid holds up to 80 pcs 21700 cells, enabling long-range configurations (e.g., 10S8P 36V, 13S6P 48V, 14S5P 52V, 16S5P 60V, or 20S4P 72V builds).

• Included Structural Cell Brackets: Ships with cell spacer holders designed to maintain precise cell spacing, prevent vibration short-circuiting, and promote air thermal dissipation.

• Versatile Multi-Voltage Compatibility: Universal shell design suitable for custom 36V, 48V, 52V, 60V, and 72V lithium battery packs.

• Impact-Resistant Protection: Tough, high-density ABS/PC shell shields your custom battery pack from accidental drops, frame flex, dust, and light weather exposure.

• Sleek Triangle Frame Integration: Mounts neatly inside the front triangle of standard bicycle frames to optimize weight distribution and keep your center of gravity low for enhanced trail handling.

📊 Technical Specifications & Details 

⚙️ Assembly & Installation Tips

1. Cell Layout Planning: Plan your series/parallel configuration (S/P) and spot-welding nickel strip pattern before placing cells into the included 21700 brackets.

2. BMS & Wiring Allocation: Leave adequate space inside the enclosure for your Battery Management System (BMS), main power output lead (e.g., XT90 / Anderson), charge port, and balancing wires.

3. Internal Insulation: Use barley paper (fish paper) and heat shrink wrap around your cell matrix to add electrical insulation before sealing the outer shell.

📦 Package Contents

• 1 x Empty DIY Triangle E-Bike Battery Enclosure Box (Matte Black)

• 1 x Internal 21700 Cell Bracket Matrix Set (Holds up to 80 cells)

Build your custom high-capacity power pack. Order your 80-Cell Triangle Battery Enclosure today and take control of your e-bike build!

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