Raspberry Pi 18650 Li-Ion Battery HAT
Raspberry Pi 18650 Li-Ion Battery HAT
Find out more on our Raspberry Pi Battery HAT,
Coming Soon... pi18650-hat.enutil-energy.com
Pi18650 With Power Supply
In this video we perform a quick test on the Pi18650 Rev 1 with a power supply at voltages higher than 5V for charging the battery via the USB connector.
We have upgraded the Pi18650 to include a voltage regulator on the USB input allowing higher DC voltages for charging the battery, a power switch to remotely reboot and power down the Pi and a 4x2 header for an ESP8266 (ESP-01) low cost wifi module integration. Having a microcontroller wifi module allows connecting to CLOUD applications and data logging along with control.
Pi18650 With Solar Panel
When we tested the solar panel outside we did not see the output reach the rating of 3.5W that was specified so when looking for a solar panel for charging make sure it is of good qaulity.This was a cheap $5 panel.
ESP8266 Firmware Flashing with Rasp Pi
We have added a 4x2 pin header for use with the popular ESP8266 low cost wifi module. In these videos we show you how to connect and flash the ESP8266 module with new firmware. We will be developing Python scripts to automate the connection process through AT commands. The ESP8266 uses 3.3V tolerant signals so no need for a USB converter, just connect to the Pi's gpio, UART and you're off. Battery monitoring can be done remotely along with rebooting your Pi and other sensor data transfer.
What is the Pi18650 HAT?
The Pi18650 is an add on HAT which plugs into the 40 pin connector on the Raspberry Pi. This HAT allows you to operate your Raspberry Pi without a power cable and can use various capacity 18650 Lithium Ion batteries. On board is a 1A battery charging circuit for charging the battery.
How Long Can The Pi Last?
The Raspberry Pi uses approximately 87mA with no USB dongle and around 103mA with the USB dongle. With a fully charged 3000mAh battery, the Pi would last 34.5 Hrs with nothing attached.
We will include one additional 40 pin stacking header to provide enough clearance for other HAT's to be stacked.
How It Works?
The Pi18650 holds a single cell lithium Ion 18650 form factor battery which should have an integrated battery protection circuit. The boost circuit maintains the voltage to the Pi at 5.1V for battery voltages of 3.7V to 4.2V. The jumper allows you to disable power to the Pi and Isolate the battery circuit or start the Pi. It also includes a charging IC which can charge up to 1A from the USB Micro connector and has a battery monitoring IC which communicates to the Pi via I2C. We have coded a Python script using I2C SMBUS for you to read the battery status. Charging LEDs show the status of the charging process. The Pi18650 can also be used with other development and SBC boards. Any DC power adaptor up to 6V max can be used with the charger.
STAT1 (ON) STAT2 (OFF) - Pre-Conditioning or Fast Charge Mode
STAT2 (ON) STAT1 (OFF) - Charge Complete
PWRGD (ON) - Power Is Good For Charge
- 1A Charge Current
- Up to 2.4A for Raspberry Pi
- Up to 18V DC Input
- I2C Battery Monitoring
- 18650 Single Cell Lithium Ion Holder
- 40 Pin Connector for Raspberry Pi
- USB Micro Connector for Charging
- Jumper for Pi On/Off/Charge
- Voltage Regulation 5.1V
- Use as a UPS or with a Solar Panel
- Wifi Header for ESP8266 (8 Pin Board)
- Remote control via ESP8266 Wifi Board and Power Switch
Risks and challenges
We have minimised the risks and challenges at this point as the Pi18650 HAT prototype is finished and tested. Firm supplier quotes have been received for assembly and production.
For shipping terms, the Pi18650 HAT will be shipped to our backers as planned for January 2017 from the successful funding of the campaign.Learn about accountability on Kickstarter
- (35 days)