UPS HAT (C)

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UPS HAT (C)
UPS HAT (C)

UPS HAT (C)for Raspberry Pi Zero.
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Brand: Waveshare
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International: Website
Chinese: 中文官网
Onboard Interfaces
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Introduction

UPS HAT (C) For Raspberry Pi Zero, 5V Uninterruptible Power Supply, Multi Battery Protection Circuits

Features

  • Onboard spring pogo pins for connecting with Raspberry Pi Zero series boards
  • Li-po battery recharge chip, with dynamic path management, more stable power supply
  • Voltage boost chip, providing regulated 5V power output
  • I2C bus communication, monitoring the battery voltage, current, power, and remaining capacity in real time
  • Multi battery protection circuits: over charge/discharge protection, over current protection, and short circuit protection, more safe and stable
  • Recharging indicator for monitoring the battery operating status
  • Comes with development resources and manual

Specifications

  • Output voltage:5V
  • Charger:5V
  • Control bus:I2C
  • Battery supported:803040 Li-po battery 1000mAh 3.7V
  • Dimensions:65 × 30mm
  • Mounting hole:3.0mm

Hardware

UPS-HAT-C-details-intro.jpg

  1. ETA6003: recharge manager
  2. TPS61088: voltage boost chip
  3. INA219: voltage/current monitor
  4. S8261: Li-po battery protection chip
  5. FS8205: Li-po battery protection MOS
  6. Pogo pins: for connecting with Raspberry Pi Zero
  7. USB recharge port: 5V charger input
  8. Battery header: for connecting 803040 Li-po battery
  9. Power indicator
  10. Recharging indicator

Note 1: Please turn the power switch to OFF before you connect the battery, or the board may be damaged because of shorting.
Note 2: The board may not work when you mount the batteries for the first time, you need to charge batteries on board for a while to activate them.
Note 3: The discharge current is about 1.8A if the battery was fully charged, and it gets smaller as the battery voltage. If the working current required by Raspberry Pi is too big, it may cause over-current and low-voltage problem and the Pi may keep rebooting.

How to use

Enable I2C interface

Open the terminal:

sudo raspi-config 
Choose Interfacing Options -> I2C ->yes 

RPI open i2c.png
Then reboot the Pi:

sudo reboot

Run the example

Fix the UPS HAT (C) with Raspberry Pi.
Open a terminal and run the following commands:

sudo apt-get install p7zip
wget https://www.waveshare.com/w/upload/4/40/UPS_HAT_C.7z
7zr x UPS_HAT_C.7z -r -o./
cd UPS_HAT_C
python3 INA219.py

The terminal will print the IP address, battery voltage, current, and the percentage of battery quantity, as well as the CPU, GPU and memory information after starting the server.
UPS HAT C 1.png
Note: if the current value is negative, it means that the batteries are feeding the Raspberry Pi. If the current value is positive, it means that the batteries are charging.

Resources

Demo codes

Document

FAQ

Question:
Why the HAT doesn't work after re-connect the battery?
Answer:
  • You need to connect and charge the battery with the HAT for a while to activate the protective circuit, and then set the switch to ON.



Question:
What is the battery life?
Answer:
  • Without other devices and in standby mode, the battery can feed the Pi zero for about 7 hours after fully charging.



Question:
What is the output current?
Answer:
  • The output current is about 1.8A if the battery was fully charged, and goes smaller as the voltage. It will automatically cut off the power if the current is too small.
  • If the power of the load is too big, the Pi zero may keep rebooting.



Question:
Why are the capacity value changing all the time and it is not accurate?
Answer:
  • The capacity is measured by the battery voltage, it is higher than the actual value if you connect the power adapter for charging.
  • The expected voltage when fully charging is 4.2V, however, the actual voltage will be smaller than it.



Question:
What kind of battery is supported?
Answer:
  • 803040 is a polymer lithium battery, the dimension is 40mm*30mm*8mm, standard voltage is 3.7V and the full voltage is 4.2V.。



Question:
How does the Charge indicator work?
Answer:
  • It turns on when charging and turns off when fully charging.



Question:
Why is the current value is negative?
Answer:
  • Negative value means that the battery is discharging and powering the Pi.



Question:
How to charge the battery?
Answer:

To charge the battery, you should connect a 5V Micro USB power adapter to the micro USB port of the HAT.


Support

Please contact us by Email/Skype/WeChat for technology support.Our response may be delay, you can just leave your questions, we will reply to you as soon as possible in working time.

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