In this DIY electronics tutorial, the creator demonstrates how to build a custom lithium-ion battery pack for an electric bike conversion project. The video explores the process of selecting and assembling 18650 battery cells, focusing on creating a 13S2P battery configuration with Samsung INR18650-25R cells that can deliver a voltage range of 39 to 54.6 volts. The creator carefully explains the technical considerations, including cell selection, parallel and series connections, and the importance of using a Battery Management System (BMS) to ensure safe and balanced charging. Using specialized tools like a spot welder (kWeld), he methodically connects the cells using nickel ribbon, creating a battery pack with a 5 amp-hour capacity and potential constant output of 40 amps. The video concludes with a cost comparison between DIY and pre-made battery packs, ultimately suggesting that DIY is viable for those wanting customization or planning to create multiple battery packs.
