Mikroelektronika d.o.o.
Tableau à clics sur l'énergie solaire
Tableau à clics sur l'énergie solaire
Impossible de charger la disponibilité du service de retrait
Il existe déjà de nombreux chargeurs de batterie et récupérateurs d'énergie solaire, mais le Solar Energy Click Board™ a la particularité unique de regrouper ces deux appareils dans un seul boîtier. Le Click Board™ utilise le Texas Instruments BQ25570, un chargeur élévateur et convertisseur abaisseur à haute efficacité à nano-puissance, conçu pour fonctionner avec des éléments de récupération d'énergie à très faible puissance, tels que les générateurs photovoltaïques et thermoélectriques.
Le Click Board™ à énergie solaire recharge la batterie Li-Po connectée ou le supercondensateur 220 mF embarqué, en utilisant l'élément photovoltaïque. Cela se fait en utilisant les capacités de charge et de récupération d'énergie du BQ25570 et les fonctions intelligentes de gestion de l'énergie nano. Ce Click Board™ peut également alimenter des appareils à faible consommation d'énergie en utilisant l'énergie stockée, offrant ainsi un moyen de fonctionnement continu des appareils à faible consommation.
Ces caractéristiques font du Solar Energy Click Board™ une solution idéale pour alimenter les réseaux de capteurs sans fil, les appareils de surveillance de l'environnement, les appareils de surveillance de la santé portables et portables et les appareils autonomes à faible consommation similaires.
How Does The Solar Energy Click Board™ Work?
The Solar Energy Click Board™ is equipped with BQ25570, nano-power high-efficiency boost charger and buck converter device, designed to work with very low power energy harvesting elements. It can both provide power to the connected external load and charge the LiPo rechargeable battery using the solar panel as the photovoltaic element - employing its energy harvesting capabilities.
The connected load will be powered on either from the connected LiPo battery or the supercapacitor soldered on board. When the battery voltage drops under the 2.85V, the interrupt pin (routed to the mikroBUS™ INT pin) will be driven to a LOW logic state. The integrated nano-power management unit takes care of providing the proper charging conditions for the battery. When the battery is charged up to 3.25V - due to the hysteresis set with the voltage divider resistors - the INT pin will go to a HIGH logic state, once again. Also, thanks to the nano-power management unit, the battery will not get overcharged above 4.06V. The click board™ provides 2.6V/100mA for the connected external load on the output terminal.
When the battery is not connected, the internal supercapacitor will be used as the energy storage element. This is useful for continuous powering up of very low power applications, as the supercapacitor should be able to provide power continuously since it will get recharged by the solar panel before it is drained out by the load. The internal converter will be disabled if the storage element voltage drops under the internally set under-voltage level of 1.95V, preventing the damage of completely draining out the connected storage element.
In addition to the INT pin, there are two more pins of the BQ25570 routed to the mikroBUS™, used to enable the BQ25570 internal sections (EN) and to enable the power output for the connected load (OUT). Setting the EN pin to the LOW logic level will enable the BQ25570 internal sections and the power charger features, while the HIGH logic level on the OUT pin will enable the power output for the connected load.
Specifications
| Type | Battery charger, Solar Charger |
| Applications | The Solar Energy Click Board™ is an ideal solution for powering wireless sensor networks, environment monitoring devices, portable and wearable health monitoring devices and similar low power self-sustained devices |
| On-board modules | Texas Instruments BQ25570 - a nano-power high-efficiency boost charger and buck converter device |
| Key Features | Provides power to the connected external load and charge the LiPo rechargeable battery using the solar panel, provides 2.6V/100mA for the connected external load on the output terminal, the battery will not get overcharged above 4.06V |
| Interface | GPIO |
| Compatibility | mikroBUS |
| Click board size | M (42.9 x 25.4 mm) |
| Input Voltage | 3.3V |
Pinout diagram
This table shows how the pinout of the Solar Energy Click Board™ corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).
| Notes | Pin |  |
Pin | Notes | |||
|---|---|---|---|---|---|---|---|
| External OUT enable | OUT | 1 | AN | PWM | 16 | NC | |
| NC | 2 | RST | INT | 15 | INT | Battery OK indication | |
| BQ25570 enable | EN | 3 | CS | RX | 14 | NC | |
| NC | 4 | SCK | TX | 13 | NC | ||
| NC | 5 | MISO | SCL | 12 | NC | ||
| NC | 6 | MOSI | SDA | 11 | NC | ||
| Power supply | 3V3 | 7 | 3.3V | 5V | 10 | NC | |
| Ground | GND | 8 | GND | GND | 9 | GND | Ground |
Solar Energy Click Board™ Electrical specifications
| Description | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Energy harvesting input terminal voltage rating | 0.1 | 5.1 | V | |
| Energy harvesting input terminal power rating | 0.005 | 510 | mW |
Onboard settings and indicators
| Label | Name | Default | Description |
|---|---|---|---|
| PWR | Power LED | - | Power LED indicates that the click is powered on |
Software Support
We provide an example for the Solar Energy Click Board™ on our LibStock page, as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.
Example Description
The application is composed of the following sections :
- System Initialization - Initializes GPIO pins used with Solar Energy Click Board™ and UART module used for data logging
- Application Initialization - Enables Solar energy click
- Application Task - (code snippet) Sequentially checks the state INT pin and reports current status by logging information to UART every 15 seconds.
void applicationTask()
{
Delay_ms( 15000 );
if (SOLAR_INT_PIN)
{
UART_Write_Text( "Battery in proper condition!");
UART_Write(13);
UART_Write(10);
}
else
{
UART_Write_Text( "Battery voltage low");
UART_Write(13);
UART_Write(10);
}
}
The example code for all architectures and compilers, and ready to use projects can be found on our LibStock page.
Other mikroE Libraries used in the example:
- UART
Additional Notes and Information
Depending on the development board you are using, you may need a USB UART click, USB UART 2 click or RS232 click to connect to your PC, for development systems with no UART to USB interface available on the board. The terminal available in all Mikroelektronika compilers, or any other terminal application of your choice, can be used to read the message.
Tableau à clics sur l'énergie solaire
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