Power bank charge controller?
I want to build a power bank but can't find a suitable charging controller.
I would also like to be able to charge it quickly, for example 2-3amps or 30watts
I will have 3.7v Li Ion cells 4 times
Power bank charge controller?
I want to build a power bank but can't find a suitable charging controller.
I would also like to be able to charge it quickly, for example 2-3amps or 30watts
I will have 3.7v Li Ion cells 4 times
https://www.aliexpress.com/item/1005006179902485.html (model 2-6S PD3.1 PCB)
It uses a single USB-C port for input and output, you can add a USB-C hub supporting USB-PD to have multiple outputs. Cooling required for higher wattages according to some of the comments.
There's a ton of options on AliExpress. Use the search terms "BMS 4s" (for 4 cells).
Then from the listings, look for the factors:
- Cell chemistry (Li-ion as you mentioned)
- Voltage and current (30 watts should exist. Just have the correct power supply or voltage regulator.)
- Balancing method (Active, passive, etc.)
- Over charge protection (probably want).
- State of Charge, State of Health, communication protocol.
- Other features that you might find.
The price depend on features, but expect to find something around $2.
There are also special power banks where you insert your own cells. These are more limited in terms of specs, with nothing past 20-25 watts the last I checked. Cell counts range from reasonable to excessive; some have displays for state of charge. Try searching power bank, followed by your cell designation (e.g. 18650).
Note that I have only researched and not tried; consider this as a start.
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