18650 (x2) Sled - Parallel or Series, Easy Contacts

thingiverse

2x 18650, Parallel or Series uses cheap and easy-to-obtain contacts from these "less than awesome" sleds on Amazon. This is based on the Keystone 1048/49 style sleds, but with wider contact slots for the much cheaper contacts. Just pull the contacts from the other sleds, nip the solder tag, and press into your new sled. Don't solder on the contacts while they're in the sled; even the keystone sleds will melt. A thin channel across the ends of the sled helps guide your wires out of the way; make a note of where to solder onto the tabs when they're in the sled (use a sharpie) to line up with the wire guide. There are two versions: one without support and one "with ears," which adds flush "helpers" for better initial bed adhesion and to prevent edge curling due to high-speed, sharp directional changes during printing. The ears are very thin and can be easily trimmed off with an Xacto/Hobby knife. If you have adhesion issues, try adding these ears to your project; they're easy to work with and make a huge difference. Using heat-sensitive, color-change filament to print these is also an option. When your batteries start to get warm, the sled will change colors to indicate that your batteries are being stressed. This could assist in preventing thermal runaway or potential failure of the cell in high-stress usage through visual indicators. Feel free to share and modify this project as you see fit; I'd love to see any remixes. Print Settings: Printer: Dremel Idea Builder Rafts: Doesn't Matter Supports: Doesn't Matter Infill: 50% - fast honeycomb Notes: Printed with esun PLA and PLA+, 220 degrees, on a PEI build platform. 3 top and bottom layers. Models with and without support "ears".