18650 battery power board



  • Hi, to power a sensor or actuator with a 18650 li-ion battery I have designed this pcb based on a tp4056 module and MT3608 booster.
    0_1546261061633_3d-front.jpg
    0_1546261074134_3d-rear.jpg

    Schematic:
    0_1546261091048_18650-pwr-001.jpg

    Main features:

    • Load sharing circuit to safely power the load while charging the battery
    • Boost converter MT3608 (optional) to increase the output voltage. To reduce the size of the board the right part delimited by the vertical white line can be cut out

    • Charging status signaling led (optional)

    • Voltage dividers (optional) to measure Vin - V batt - V boost - V standby. Output available through J4
    • Battery reverse polarity protection through mosfet Q4, excludable through jumper JP3
    • Battery voltage measure point can be selected through jumper JP2

    This board can be used with this one

    I have ordered it (JLCPCB) but yet tested. After that if someone is interested I can share it through openhardware.

    Any suggestion / improvement / comment is well appreciated.


 

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