18650 Single Li-Ion Cell Cradle with metallic AA battery contacts -- stand-alone and built-in version
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Connect up your accumulator without soldering, using traditional spring/plate contacts
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- Źródło
- Printables
- Kategoria
- Electronics
- Licencja
- Creative Commons — Attribution
Yet Another 18650 Case?
Well, yes. This one is special compared to the others on Printables in one respect: it uses inset metallic AA contacts (spring/plate) to help avoid soldering. Also, it has a variant that is specifically designed for inclusion into another, larger model at design-time.
This model is for you if you have at your disposal a set of contacts like this. The plate side is 12 mm.
Options
The case comes in two variants:
Stand-alone battery cradle: intended for table-top use, prototyping, or mechanical installation into your project. It has an opening in the spine so that you can easily press the battery out when you want to change anything.
Includable (built-in) battery cradle: an
STLmodel that is not sturdy enough if printed alone, but is fine for inclusion and blending into various other boxes you may be printing. Include it in your CAD, or right in the slicer.
The includable cradle option goes into any box you have, either in CAD, or in slicer. This is a screenshot from prusa-slicer demonstrating the principle.
Printing
PLA is completely fine. I print upside down with a 0.4-mm nozzle and 0.2-mm layers. Even the domed spine prints without supports.
Assembly
Fit the contacts into the recesses in both ends. In the stand-alone versions there are grooves that fit the pins in four possible directions. The includable version has those grooves only on the left and right side. You may secure the contacts with double-sided tape of a drop of glue, but it's OK to just let them sit.
Slot the battery in. It will hold the contacts in place. It is recommendable to maintain polarity (spring is negative) just to save confusion, e.g., if someone else handles your project down the road.