18650 Battery Packs

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YouTube

Point: there are plenty of DIY battery pack builds. And 18650 cells are good, even though not sustainable (see World Lithium Reserves) but are a good interim solution prior to the Hydrogen Economy.

  • [1] - $60 charger for 120W. 24 battery pack. Means 3Ahr*3.7V=10W each. So 240Whr of power, for $300.
  • 2.8Kwhr battery - [2]

Commercial Off the Shelf (COTS)

  • 15W, 10 bat pack - $40 - [3]
  • Battery Holder - [4]
  • Vruzend battery caps - [5] - modular battery system. See biased video at - [6]

3D printed 18650 battery holders

  • Modular 18650 Battery Holder [7] with SolveSpace, FOSS 3 CAD, file [8]
  • 1P 18650 battery holder [9]
  • 18650 Batteries spacer/holder [10]
  • 18650 snap-together tower of power (2,4,5,6 cell options) [11]
  • Simple 18650 solderless battery housing [12]
  • 18650 Battery Box [13] github with scad [14]
  • 6P stackable 18650 batteries holder [15]
  • 18650 holder for e-bike and other projects 24/32cells [16] with freeCAD files
  • 18650 holder configurable with scad file [17]
  • 18650 Expandable 7-cell pack [18]
  • 5P modular Open_Source_Battery_Pack using pyopenscad and connectable with Bus-Bars

DKblock

An OSHWA industrial strength modular system to package and protect lithium-ion cells for battery packs in mobile and stationary applications
Website [19], Github [20]

OSBP

An Open_Source_Battery_Pack 5-cell design concept similar to a AA battery holder, for 18 volt and up to 14-15 Amps that can be used in power tools and modular designs. Cells are *not* soldered or tack-welded: poron foam pushes internal bus-bars against the cells to keep a contact. Each and every cell is protected by BMS charging and current limiting, for safety and a longer lifetime. Despite being a row of 5 cells, the 18650 cells are visible at the top and bottom and therefore may interleave in a hexagonal arrangement to save space. Multiple packs can be screwed onto Bus Bars to provide power for high-current and high-voltage applications such as EVs, Welders etc, or wire-terminals screwed onto the internal contacts, to connect Anderson or XT Plugs for use in Electric Bicycles.

Builds

  • How To Build Your Own Lithium Battery - Part 1 [21], Part 2 [22]
  • Spot welding - [23]

Links

How They are Made

  • Cord drill battery packs - [25]

Internal Links