Tesla Model S Spacer for OHMMU 12V replacement LFP battery
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Battery spacer that enables OHMMU LFP battery to be installed properly in a 2017 Tesla Model S (or similar).
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The 2017 Tesla Model S (and I believe this is true for 2016-2020) uses an OEM 12V battery with the designation DCS-33UNCR. OHMMU sells an LFP (LiFePO4) replacement battery that is an upgrade to the standard SLA 12V battery. Unfortunately, the OHMMU battery is 6.9mm shorter than the OEM battery, and as a result, the hold-down clamp (see photo) does not properly secure the OHMMU battery. The easy solution is this 7mm spacer, that fits in the battery tray and raises the battery to ensure a secure fit with the hold-down clamp.
There are no special print settings required, as this is a very, very simple design, but it is very important to print this in TPU and not a hard material. I used Overture High-Speed TPU with a shore hardness of 95A and this worked perfectly; stiff enough to not sag when the battery is placed on top, soft enough to provide some cushioning, and can withstand the potentially high temps under the hood.
Print Settings (not critical):
Nozzle: 0.6
Layer height: 0.42
Top Layers: 3
Bottom layers: 3
Walls: 3
Infill pattern: Gyroid
Infill: 10%
Filament: Overture HS TPU 95A (MUST use TPU or a similar filament)
The STEP file is provided if you need to customize this in any way.