DIY Guide to Building a 100W PD Fast Charging Power Bank

If you are interested in DIY power banks, you may want to take a look at this article.
If you want a 100W power bank, and you just happen to have a main control chip on hand, you might suddenly get the idea to try assembling one yourself.

The board you have is very nice and offers good heat dissipation. It uses the Injoinic IP5389H main chip, along with six 045N04 MOSFETs. The output side features a 25V 100µF solid-state capacitor.

Just by chance, you also have an EVE Energy 21700 battery cell, model 50E.

Then you assemble the battery pack by connecting four cells in series, spot welding them, and soldering the voltage sensing wires.

This is what the basically assembled unit looks like.

Then you add heat sinks to the main chip and MOSFETs to improve thermal performance. The heat sinks are made of pure copper.

This is what the assembled structure looks like.

You will need a cable with an E-Marker chip to achieve and properly negotiate 20V 5A power output.

You can use a laptop to run AIDA64 for testing, and it can basically reach around 100W output, with acceptable heat generation.

Finished.