21700 4S8P USB+XT60 Powerbank

prusaprinters

<p>Made to build a 4S8P pack out of 24 21700 cells with BMS, 2x USB Ports and an XT60 connector</p><p>Using <a href="https://www.nkon.nl/de/rechargeable/li-ion/21700-20700-size/lg-m50lt.html">LG INR21700-M50LT</a> cells, the pack is will have approx. 580 Wh.</p><p>Needs a M3 tap and M3x12 screws</p><p><strong>Warning</strong>: Open Points / Deficits for a possible v2</p><ul><li>Screw Holes in Midframe need space where debris from cutting threads can go - or - replace threaded holes with self-threading size or inserts</li><li>Space for USB Boards</li><li>Distance between screwheads and outline (arachnae pathing creates short stubs)</li><li>Optimize material use / internal geometry</li><li>Change layout from Left/Right Plates to Top/Bottom as a 4S Pack will always have BAT+ and BAT- on the same side, so there only needs to be a single wire running from one side to the other for the B2 balance connector</li></ul>