Traditional-Code9728
Here are the main features:
-It has a total capacity of 93Wh (25000mAh) so it's airline safe
-Bidirectional USB C power delivery port 100W up to 20V
-Bidirectional adjustable DC port with adjustable voltage from 3-32V and adjustable current from 300mA up to 5A also 100W
-Both ports support MPPT tracking as universal voltage inputs and adjust the charging power based on the capabilities of the charger and the power drawn from the batteries
-Dual USB A ports each up to 25W 5-9-12V supporting all modern fast charging protocols
-Bright 280 lumen LED flashlight with adjustable brightness built in
-Passthrough mode supported so powerbank can be charged and power other devices at the same time
-Color screen shows all relevant information like input/output power, temperature of the batteries and the board, battery percentage, voltage, current and power of the DC port and enables the user to interact with the powerbank by the two buttons on the side.
Future features that i plan to implement:
-Adjustable discharge and charge limits of batteries which can increase the cycle count of batteries significantly
-Pin lock so the user can lock the powerbank from unauthorized use
-Adjustable output voltage and current also from the USB C port
David Scholten
Simen Sollihøgda
Alex Klimaj
Very interesting and very similar to the direction I am going to create a UPS for miniPCs like the MinisForum UMx90 and the Mercury EMx80 series. The former could be basically a 5”x5” based NUC style miniPC. The key is that 140W (former) and 100W ( latter) is essential at 196Wh (5s2p 21700) for the UM790. 98Wh for the smaller (5s1p 21700) Mercury EMx80 which is only 80mmx80mmx60mm. These units will magnetically attach to the base of the miniPC with a thin ferrous steel plate (which also helps dissipate the heat from the miniPC). I would prefer the battery circuit provides serial data via USB to the PC (Windows or Linux) as Plug&Play “Battery” driver for power management of the miniPC. The company miniBox has created a board that can handle 6A out, multiple battery chemistry with USB output. It is somewhat pricey at $119, but it does include bucket boost converter, BMI, protection and USB data out and SW. The board isn’t too big, but it does require heatsinks and possibly active cooling to run it continuously at 20VDC/6A, but does not have USBc PD handshaking onboard. Still, it has worked pretty much flawlessly for about a year now, but it too is tad underpowered at peak power draw of 130W.