BMS often ship in locked state: no output voltage is available at the output pins. Locked state is also entered whenever over-current protection was triggered. To unlock the BMS, connect it to a charger. If you did not add a dedicated charger board, apply the appropriate charging voltage to its output terminal.
2A
For currents up to 2A, you can use a tiny BMS:
This board often goes by the model number HX-1S-3038.
The solder pads for the battery are available on both sides and marked B+ and B-:
Due to the small size, all markings are printed on the back side only:
The output voltage is available at the terminals P+ and P- in the middle of the backside.
Specs
| Protection | Threshold |
|---|---|
| Operating Current | 2A |
| Upper Peak Current | 2.5A |
| Over-Charge | >4.25V |
| Over-Discharge | <2.5V |
| Short-Circuit Protection | yes, delayed self-recovery |
| Size | 30x3.7x2.2mm |
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(content created Mar 24, 2024)