Constructed an electric longboard capable of hitting a top speed of 25mph with a range of 15 miles. The board is equipped with a programmable ESC that allows for fine motor output adjustment and parameter monitoring such as current and power.
Showcasing the latest rendition of the electric longboard
For my battery pack I went with Samsung INR 18650 2500mAh cells rated at 20 amps each. They are configured in a 10 series, 2 parallel configuration (10s2p) giving me a total capacity of 5Ah and a nominal voltage of 36V.
The cells are housed in a 3D printed case and oriented in an alternating fashion. This allows for simple wiring of the series connections.
Picture showcasing the motor assembly, electronic speed controller and battery pack.
For safety measures a battery management system (BMS) was installed to insure all cells were properly balance. The BMS however proved to be faulty as the cells would not charge through the BMS, thus it was discarded.
Plastic heat shrink was applied to the battery packs for weather proofing.
Closer look at the ESC case which encloses the LCD display for battery percentage and power button.
Battery covers were printed from PLA plastic and bolted to the board, securing the battery packs to the board.
Closer look at the charging port and ESC case.
Unsatisfied with the power output of the board I installed a programmable ESC capable of delivering an impressive instantaneous 800A draw. Likewise, the smaller 70mm wheels were replaced with 97mm wheels increasing the overall topspeed.
Motor drive connections are waterproofed with Oring connectors.
Revision of the ESC case with a built-in charger port and 3 holes to accept the waterproof connectors. Material choice is also revised and upgraded to Thermoplastic polyurethane (TPU) which is more elastic than PLA preventing the case from cracking under vibrations or impact.
