Built this small pocket size 150 watt Inverter /DIY/

Project Overview: 150W DIY Portable AC Power Station In this video, I demonstrate how to build a compact and powerful 150W AC inverter system from scratch. This project is designed for portability and efficiency, utilizing a 12V Li-ion battery pack and a custom acrylic enclosure. Beyond the assembly, this project also covers critical troubleshooting and component-level repair after a circuit failure during the testing phase. Technical Specifications and Components Inverter Module: 150W DC-to-AC power inverter. Battery Configuration: 3S2P (3 Series, 2 Parallel) lithium-ion battery pack using 2600mAh cells, providing a stable 12V output. Battery Management System (BMS): 12V 20A BMS for overcharge, over-discharge, and short-circuit protection. Charging System: PD (Power Delivery) charger trigger module for high-speed USB-C charging. Thermal Management: 12V 0.5A active cooling fan. Chassis: Custom-cut clear acrylic glass for a transparent, professional aesthetic. Hardware: Heavy-duty 5-pin AC socket and high-current rocker switch. Step-by-Step Construction Process Battery Pack Assembly: The foundation of the unit is a 12V pack created by spot-welding 2600mAh lithium-ion cells in a 3S2P configuration. This ensures a balance between capacity and discharge capability. BMS Integration: To manage the cells correctly, a 20A BMS was wired to the pack. This is essential for balancing the voltage across the cells and protecting the circuit from thermal runaway. Circuit Wiring: The inverter module was connected to the battery output via a master switch. A PD trigger module was integrated to allow the internal batteries to be recharged using standard modern fast chargers. Cooling and Housing: A 12V cooling fan was installed to maintain optimal operating temperatures for the MOSFETs. The entire assembly was housed in a custom-built clear acrylic case, showcasing the internal electronics and wiring . Troubleshooting and Component Repair During the testing phase, a short circuit occurred within the inverter module, leading to a catastrophic failure of the BMS. This project highlights the importance of circuit diagnosis and repair: BMS Recovery: The original MOSFETs on the BMS were damaged by the surge. These were replaced to restore the protection board's functionality. Inverter Repair: Upon inspection of the 150W inverter module, the primary MOSFETs and the 3425 PWM controller IC were found to be defective. Upgraded Components: To improve reliability and performance, the original transistors were replaced with IRF3204 MOSFETs, known for their high current handling and efficiency. Key Takeaways for DIY Enthusiasts This DIY portable power station is an excellent project for those interested in electronics engineering and renewable energy solutions. It demonstrates not only how to build a functional tool but also how to perform component-level repairs on power electronics when things go wrong. SEO Keywords: 150W Inverter, DIY Portable Power Station, Lithium-ion Battery Pack, 3S2P Configuration, 12V BMS Repair, IRF3204 MOSFET, PD Trigger Module, Electronics Troubleshooting, Acrylic Case Mod, DIY Electronics Project, Power Inverter Repair.