NA Miata Battery Tray

thingiverse

I designed this battery tray for my track-only Miata when I was still using the factory battery. Its primary function is to keep the battery securely located, preventing it from shifting around and causing issues. I've seen friends and acquaintances who have experienced battery shift under the bracket, resulting in a short circuit at the positive terminal. In some cases, this has even led to fires, but I was fortunate enough to only suffer a melted bracket that stopped the shorting process. This model is specifically designed for use with the factory battery bracket, providing lateral support and ensuring the battery's stability. The dimensions of the battery cavity can be scaled if necessary: 192mm x 127mm x 28.25mm deep. It was printed using an Ender 3 build platform. The front left bolt hole utilizes the factory M6 bolt location, while the front right hole requires drilling and adding a standard M6 bolt with nut. The rear two holes accommodate a 1/8" rivet and washer. The rear cutout aligns perfectly with the factory battery stop towards the front of the car. A front hole is also included to secure the battery hold-down using zip-ties or mechanics wire, providing an extra layer of safety in case the nut walks off or the J hook fails. Initially, I printed this tray with 15% infill using PETG to minimize weight and heat resistance. While it worked well for one event, I recommend increasing material density for added durability.