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It is an uninterruptible power supply (UPS) module suitable for Jetson Orin series motherboards. It adopts a spring pin design and uses three 21700 high-capacity lithium batteries. It supports simultaneous charging and discharging and can monitor battery parameters such as voltage, current, and power through the I2C interface.
The 15V~19V interface is the input power supply. To ensure the maximum power of Jetson Orin, the power supply current should be greater than 2A. It is recommended to use 45W Power Supply Adapter 19V 2.37A.
WARNING LED is a battery reverse indicator light, and the LED being on indicates that the battery is connected reversely. BOOT is the activation key for the protection circuit. OFF/ON is the power switch.
Note 1: Before installation, you need to turn the switch to OFF to turn off the power, otherwise it is easy to short circuit. After the installation is complete, make sure the Pogo pins are fully aligned with the pin headers before turning on the power. If the Pogo pins are not conductive, you can press them down and release them, or scratch off the oxidation layer on the pin headers with a knife.
Note 2: When you connect the battery for the first time, you need to pay attention to whether the WARNING LED light is on, if the LED is on, it means that the corresponding battery is reversed. Charging is prohibited when the battery is reversed.
Note 3: There may be no power output when the battery is connected for the first time, and you need to press the BOOT activation button or charge to activate the battery protection chip for power output. The power switch needs to be dialed to the ON position.
Note 4: When the battery is powered for a long time, the operating current should not be too large, otherwise the battery will heat up.
Note 5: If the positive electrode insulation pad of the battery is damaged, it is recommended not to continue using it, which may cause a short circuit and fire. When removing the battery, do not use a screwdriver to pry open the positive electrode of the battery, which may easily cause a short circuit. Instead, pry open the negative electrode of the battery.
Note 6: After the battery is fully charged, it will be in a disconnected state and will not continue charging. Charging will only resume when the battery voltage is below 12V.
First, install the battery onto the module, paying attention to whether the battery is reversed and whether the warning light is on.
Before installing the Jetson Nano, make sure to set the switch to OFF. Otherwise, the Pogo pins might touch other circuits and damage the Jetson Nano.
The first battery installation requires charging to activate or press the BOOT key to activate the protection chip to output power.
Run the following commands to run the demo:
sudo apt-get install python3-smbus wget https://files.waveshare.com/wiki/UPS%20Power%20Module%20(C)/UPS_Power_Module_C.zip unzip UPS_Power_Module_C.zip cd UPS_Power_Module_C python3 INA219.py
After the program runs, it will output battery voltage, current, power, and battery remaining percentage, etc. The information is shown in the following figure:
Note: If the current is negative, it indicates the battery output current (which can be considered as load current), and if the current is positive, it indicates the battery charging current.
When reconnecting the battery, you need to press the Boot button to activate it or connect the power supply to work normally.
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