18650 Battery Charging Tray (w/ and w/o BMS)

Description

I Got Tired Of Working Hard To Avoid Damaging Cells As I Pried Them Out Of My Commercial One Cell Holder After Charging. That Thing Was Sized For Unprotected Cells, But Even Those Weren'T Very Easy To Remove. So I Designed This Thing In Freecad For Charging One 18650 Cell At A Time, Either An Unprotected Cell, Or One With Bms Protection Installed... Of Course With Ease Of Use Being A Priority. It Uses 4X "Keystone 209" Battery Clips From Mouser: Https://Www.Mouser.Com/Productdetail/Keystone-Electronics/209?Qs=Sgaepimzzmsqtlbhqkq43U9R475Cjebs I Added "+/-" Polarity Symbols In Both Trays In Case Non-Colored Wires Are Used. The Symbols Can Optionally Be Filled In With A Contrasting Color Abs Slurry Or Paint For Better Visibility; My Uploaded Pic Shows My Results With White Abs Paste. The Side Cutouts Are Sized And Filleted To Allow Easy Battery Removal With My Big Fingers. I Also Added Several Structural Fillets So It Will Hold Up To Field Use. I Wired My Battery Clips In Parallel With A 18Awg Fine Strand Silicone Insulated Wire, And Terminated Them With A Dean'S Ultra Connector To Work With My R/C Hobby Chargers. The 4Mm Diameter Wire Holes Were A Perfect Fit For That Wire. Of Course Other Types Of Wire Will Work, But If Your Insulation Od Is >4Mm You May Have To Drill The Holes Larger. I Printed In Abs, Because Mine Will End Up In The Trunk Of A Car During A Hot Summer. Otherwise Any Filament Should Suit The Purpose Structurally. I Designed This Thing To Print With 2 Walls At 0.45Mm Line Width, And 0.2Mm Resolution. Other Settings Should Work, However I Recommend Sticking With Walls >=0.9Mm Thick To Ensure The Battery Clip Walls Provide Adequate Support.

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