![]() ![]() I you REALLY need to add a fuse to the PCB It would be very easy to add one or even two. Thermal, over-current and discharge protections are bypassed with an adapter like this, so shorting the terminals, letting the battery get too hot or too deeply discharged will likely permanently damage it or worse. The tools normally used with these batteries provide important protections against various adverse conditions. Alternatively, you can flip the layer in Kicad, move the C3 terminal to the other side of the C1 terminal, and then plot the top copper layer. If you are not using the Flatcam workflow(build.txt), then be sure to mirror both the gerber and excellon files 1" above the X axis. Note that the gerbers included with this project plot the bottom copper layer. They can be used to attach extra wires or components, if desired. The middle two barrier block terminals are not connected to anything. The PCB can be screwed into the adapter body or glued, making sure that the PCB sits flush or just under the inside surface of the adapter body. The middle terminals on the PCB should be cut down to half-height as shown using a dremel or file. Trace isolation, holes, and board cutout are all done with the same 0.025" regular length end mill. ![]() ![]() The circuit board was milled on a Nomad 883 Pro CNC. The adapter body was printed in PLA with a 0.3mm layer height. If the C1 and C3 terminals are connected without the switch depressed, two cells are shorted together which instantly bricks the battery (won't charge or run tools.) These are normally used for cell balancing during charging, but with the switch depressed, they can be connected together to produce 60v at the B+/- terminals. The Flexvolt battery incorporates a switch in the body of the battery which, in part, controls if the battery is wired up in series (60v) or parallel (20v.) The other piece of the puzzle is the connection between the C1 and C3 terminals. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |