SolarCharger

[blocked]

Table of Contents

1. About The Project
   • Built With
2. Build one
3. Usage
4. Roadmap
5. License
6. Contact
7. Sponsor

About The Project

The solar charger uses the energy from a solar panel (using MPPT) to charge a Li-Ion rechargeable battery and provide an stable 5V - 0.6A output. The project was created to test a small circuit before using it with other projects.

(back to top)

Built With

(back to top)

Build one

Documentation is updated.

1. Get the gerber files for the latest version: V1.0
2. Send them to a PCB manufacturer (Our Sponsor is PCBWAY)
3. You should solder all the components in the board. (The schematic is available here v1.0)

(back to top)

Usage

As soon as you connect a battery, the output voltage will be activated.

Protections:

• Solar Panel

  • Input voltage from 3V to 20V. It has over-voltage protection (OVP).
  • NTC Sensor: The charging process is compatible with the JEITA temperature standard for Li-Ion batteries, limiting the charge of the battery depending of the temperature of it.
  • Protection for short-circuit in the battery.

• Battery

  • Overcharge Detection Voltage at 4.2V (25mV accuracy)
  • Overcharge Hysteresis Voltage Range. (Release at 4.1V)
  • Overdischarge Detection Voltage at 2.5V.
  • Overdischarge Hysteresis Voltage Range. (Release at 3.0V)
  • Discharge overcurrent detection voltage.
  • Short current detection voltage.
    Note: You may want to select a different AP9214 configuration depending of your battery type. We have tested the AP9214L-AE-HSB.

• Output

  • Voltage fixed at 5V +-1.5%
  • Undervoltage protection.
  • Overvoltage protection at 5.7V
  • Overcurrent and shortcircuit protection (+1A). It will recuperate when the shortcircuit is released.

(back to top)

Roadmap

• Assembly New Board
• Test with electronic Load.
• Validate ratings

See the open issues for a full list of proposed features (and known issues).

State: Project FINISHED - 12/09/2023

Priority: High

(back to top)

License

Distributed under three licenses:

• Hardware
• Software
• Documentation

(back to top)

Contact

Making Devices - @MakingDevices

Project Link: https://github.com/makingdevices/SolarCharger

Other Links: LinkTree

(back to top)

Sponsor

PCBWAY is the most professional PCB manufacturer for prototyping and low-volume production to work with in the world. With more than a decade in the field, They are committed to meeting the needs of their customers from different industries in terms of quality, delivery, cost-effectiveness and any other demanding requests. As Sponsor of Making Devices, they will be in charge of all the PCBs for MDV, allowing both of us to grow together in a long term partnership. We hope you take them into account for your both personal and professional prototypes or products.