Trying to Get BMS to Supply Bare 5v

Thread Starter


Joined Jun 30, 2023
Currently trying to get this board to simply supply me 5v through the USB terminals on the back.

I have the USB + and - hooked to a Wemos D1 Mini V4, and when I activate the KEY button on the charger board (with a battery powering the board), it flashes on for a moment then turns off. I assume this is because the IC (IP5301) needs some sort of indication that there’s a device connected. The Wemos draws about 150mah I believe, so it should be enough for a load-based detection system (so I assume that’s not the issue - I also tried powering four Wemos boards with it, same result). So, I can only assume I have to do something with the D- and D+ pinouts. I tried putting a 160ohm resistor between them, tried just straight shorting them, and nothing works. The datasheet even says that it supports D pin shorting (page 16), so I’m at a loss for why it won’t work.


Hopefully one of you smart fellows can help me out. Any help would be much appreciated! Thank you.