Introducció
The Youmile CN3791 is a 12V solar charge controller board designed for single-cell lithium batteries. It features Maximum Power Point Tracking (MPPT) to efficiently extract power from solar panels, ensuring optimal charging performance even with varying light intensity. This module automatically adjusts to maximize the power output from your photovoltaic cells, converting it into charging current for your battery.
Figura 1: Youmile CN3791 12V MPPT Solar Charge Controller Board with JST PH2.0 cables.
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Aquesta secció ofereix una visió generalview of the CN3791 module, highlighting its key components and interfaces.
Figura 2: A dalt view of the CN3791 board, displaying the main chip, inductor, capacitor, and JST PH2.0 connectors for solar input and battery output.
Figura 3: A baix view of the CN3791 board, indicating potential voltage selection points (5V, 6V, 9V, 12V). For this specific 12V model, the input voltage requirement is 12V for charging a 3.7V lithium battery.
Configuració i connexions
Follow these steps to correctly connect your solar panel and battery to the CN3791 charge controller board.
- Identificació de connectors: The board has two sets of JST PH2.0 connectors. One set is labeled "SOLAR IN" for the solar panel, and the other is labeled "BAT+" and "BAT-" for the lithium battery.
- Connecteu el panell solar: Insert the solar panel's JST PH2.0 connector into the "SOLAR IN" port. Ensure correct polarity (+ to + and - to -).
- Connecta la bateria: Insert the lithium battery's JST PH2.0 connector into the "BAT+" and "BAT-" ports. Again, observe correct polarity.
- Optional Load Connection: The board also provides output terminals for a 3.7V load, allowing the battery to power a device while being charged.
Figura 4: Connection diagram illustrating how to connect the solar panel, 3.7V lithium battery, and an optional 3.7V load to the CN3791 module using JST PH2.0 interfaces.
Figura 5: The CN3791 board with the included JST PH2.0 cables connected, ready for solar panel and battery integration.
Figura 6: Un primer pla view of the JST PH2.0 connector cable, typically used for connecting the solar panel and battery to the charge controller.
Instruccions de funcionament
Once connected, the CN3791 module operates automatically to charge your lithium battery.
- Automatic MPPT: The integrated CN3791 chip continuously tracks the maximum power point of the solar panel. This ensures that the maximum available power is harvested from the solar panel and converted into charging current for the battery, even under varying light conditions.
- Procés de càrrega: When the solar panel receives sufficient light, the module will begin charging the connected 3.7V lithium battery. The charging status may be indicated by onboard LEDs (refer to specific board markings if present).
- Protecció de sobrecàrrega: The module is designed to prevent overcharging of the lithium battery, extending its lifespan.
Manteniment
The CN3791 solar charge controller board requires minimal maintenance to ensure long-term performance.
- Mantenir net: Ensure the board is free from dust, dirt, and moisture. Use a soft, dry brush or cloth for cleaning if necessary.
- Protecció del medi ambient: Operate the module within its specified temperature and humidity ranges. Avoid exposure to extreme conditions or corrosive environments.
- Inspeccionar connexions: Periodically check all JST PH2.0 connections to ensure they are secure and free from corrosion.
Resolució de problemes
If you encounter issues with your CN3791 solar charge controller, consider the following troubleshooting steps:
- Indicació de no càrrega:
- Verify that the solar panel is receiving sufficient sunlight.
- Check all connections (solar panel to board, battery to board) for proper seating and polarity.
- Assegureu-vos que el panell solar voltage is appropriate for the 12V input requirement of the board.
- Confirm the battery is a compatible 3.7V lithium battery.
- Baix corrent de càrrega:
- Assegureu-vos que el panell solar estigui net i lliure d'obstruccions.
- Check for any damage to the solar panel or connecting wires.
- Verify that the solar panel's power output matches the board's capabilities.
- Board Overheating:
- Assegureu-vos que hi hagi una ventilació adequada al voltant de la placa.
- Comproveu que l'entrada voltage and current from the solar panel do not exceed the board's maximum ratings.
Especificacions
| Característica | Detall |
|---|---|
| Número de model | JK-YM-046 |
| Entrada Voltage | 12 Volts (from solar panel) |
| Vol. De sortidatage | Designed for 3.7V single-cell lithium battery charging |
| Tipus de càrrega | MPPT (seguiment del punt de màxima potència) |
| Tipus de bateria | Single-cell lithium battery |
| Connectors | JST PH2.0 |
| Dimensions (L x A x A) | 45 mm x 20 mm x 12 mm (aproximat, basat en la imatge) |
| Pes | 10 grams (aproximadament) |
Figura 7: Physical dimensions of the CN3791 module, showing a length of 45mm and a width of 20mm.
Garantia i Suport
For warranty information or technical support, please contact the seller or manufacturer directly. Refer to your purchase documentation for specific details.
També podeu descarregar un manual d'usuari oficial en format PDF: Descarrega el manual en PDF