Tiny e-Lab Bosch 18V Battery Adapter

thingiverse

The module in the photos lacks the two XT60 connectors on its sides, but I'm still waiting for these to arrive via mail. This module was designed specifically for marcluer's Tiny e-Lab system: [Link](https://www.thingiverse.com/thing:2999383) You plug an 18V Bosch battery into it, and it will power any connected Tiny e-Lab modules with 18-20V from the battery. This allows you to power a stack of Tiny e-Lab modules at 18-20V away from a power outlet. The adapter fits "green Bosch" 18V Power4All batteries, not Bosch Professional 18V batteries. Make sure you don't plug in a power supply into your Tiny e-Lab stack while this is connected! I strongly recommend printing Mpooh's fuse holder and wiring in an automotive fuse in series with the battery. The battery probably has protection circuitry, but who knows how much power this battery can supply before protection shuts it down. I use a 3A automotive fuse on my module, and if it blows too quickly I might switch to 5A fuses. Automotive Fuse Holder: [Link](https://www.thingiverse.com/thing:2757801) The part that actually mates with the battery is GreaseMonkey88's Bosch battery to XT30 connector adapter, modified to be slightly taller. Adapter: [Link](https://www.thingiverse.com/thing:4244545) ## BOM - 6x M3 screws, length between 5-18mm - 2x Male 6.2mm spade connectors (battery connection) - 2x Female 6.2mm spade connectors (automotive fuse holder) - 3A or 5A automotive fuse (these are dirt cheap!) - A pair of XT60 connectors, male and female ### Optional You can add two more of the male and female spade connectors if you want to make it easy to completely separate the front panel from the rear of the module. ## Wiring The battery adapter part needs two male spade connectors to connect with the battery terminals. Crimp wires to the connectors, then glue them in place with lots of hot glue. The positive wire from the battery should go to a female spade connector in the fuse holder. The male and female XT60 connectors on the sides should be connected together, + to +, - to -. Then, the positive wire from the fusebox goes to + on one of the XT60 connectors, and the negative wire from the battery goes to the - on an XT60 connector. ## Assembly 1. The wiring and gluing of the adapter part must be done first. 2. Then the battery adapter screws onto the Front panel, using 4x M3 screws. - I suggest drilling out the tiny holes in the battery adapter to 2.5mm diameter. This will make it easier to screw in the M3 screws. 3. XT60 connectors should be glued in place, and wiring completed. 4. The Front clicks together with the Rear (start at the top). 5. The front and rear screw together using two M3 screws (from the underside of the module). Fusion 360 archive file is attached if you want to tweak something.