Battery Box with Spade Terminals
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Battery box with piggyback spade terminal holders.
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This is a battery box that uses piggyback spade terminals for the outputs. The default dimensions are for four 32650 LiFePO4 cells, a BMS and a bit of padding.
The connectors I used are called “piggyback connectors”. They friction fit pretty tightly into the holders on the underside of the top. Adding a little hot glue wouldn't hurt.
Use super glue or epoxy to keep the top shut.
I've included the FreeCAD file to customize. See below for parameters.
Tips are welcome! - https://paypal.me/RobinAltoft
Spreadsheet Parameters
All dimensions are in millimeters.
Battery Width: Width of the inside of the box.
Battery Depth: Depth of the inside of the box.
Battery Height: Height of the inside of the box.
Top Gap: Height of the inside of the top. I found leaving a 10mm “gap” between the top and the top of the battery gave me room to add a piece of foam to support the battery.
**Also, make sure to leave at least a gap that is your Terminal Height + 3mm above your battery, whether you use this parameter or account for it in your Battery Height.
Terminal Width: Width of the widest part of the piggyback connector. (In my case it was the female terminal.
Terminal Length: Length of the female terminal on the piggyback connector, not including the crimp barrel - just the part that holds a male terminal.
Terminal Height: Thickness of the female terminal on the piggyback connector.
Terminal Thickness: Thickness of the male spade terminal on the piggyback connector.
Terminal Spacing: Distance between the terminals on the finished battery.