UPS HAT (C)

UPS HAT (C) UPS HAT (C) for Raspberry Pi Zero

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Primary Attribute Category: {{{userDefinedInfo}}}: {{{userdefinedvalue}}} Brand: Waveshare

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Onboard Interfaces

Related Products

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, a 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: overcharge/discharge protection, over current protection, and short circuit protection, more safe and stable.
• Recharging indicator for monitoring the battery operating status.
• Comes with online development resources and manuals.

Specifications

• Output voltage：5V
• Charger：5V
• Control bus：I2C
• Battery supported：803040 Li-po battery 1000mAh 3.7V (NOT included)
• Dimensions：65 × 30mm
• Mounting hole：3.0mm

Hardware

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

The Micro USB port is the charging port, the Input voltage is 5V, LED is on when charging and off when fully charged. 0FF/ON silkscreen is the power switch silkscreen.
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 problems and the Pi may keep rebooting.

SAFETY CAUTIONS

• Li-ion and Li-po batteries are quite unstable. They may cause fire, personal injury, or property damage, if they're not properly recharged or used.
• Do not reversely connect the polarities when recharging or discharging the battery. Do not use inferior charger/charging panel to recharge the battery.
• Do not mix use old batteries with new ones, avoid using batteries of different brands.
• When buying Lithium battery, make sure the battery specification is compatible with the expansion board. Choose batteries from formal manufacturer, and ensure the batteries will work stably and safely by aging test.
• Lithium batteries have limited cycle life, they will also deteriorate as time goes by. Should be replaced with new ones when the batteries reaching their max cycle life, or working over two years, whichever comes first.
• Should be placed carefully and properly, keep it away from inflammables and explosives articles, away from children, avoid any safety accident caused by careless storage.

How to use

Enable I2C interface

Open the terminal:

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

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://files.waveshare.com/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.

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

• Demo codes

Document

• Schematic
• 1/10/Ina219.pdf INA219 Datasheet
• 3/3f/ETA6003.pdf ETA6003 Datasheet
• 1/18/TPS61088.pdf TPS61088 Datasheet
• 8/8d/S8261.pdf S8261 Datasheet

FAQ

Question: Why the HAT doesn't work after re-connecting 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 is 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 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.

Question:Running the demo and it prompts IO ERROR?

 Answer:

• I2C is not turned on, please turn on the I2C of Raspberry Pi.
• The pogo pin contact is poor, you can use the following command to test whether the device is recognized:
• Install i2c-tools for easy viewing of the I2C address, and enter it in the console:

sudo apt-get install i2c-tools

After waiting for the installation, you can execute the following commands to view the I2C address:

sudo i2cdetect -y 1

If the UPS HAT is inserted by default, you can see the following effect after running the following commands:

If it is not recognized, please tighten the screws and solder the pin header to make it tight.

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Question:Can't output after unplugging the battery?

 Answer:

After replacing the battery, you need to charge it first to activate the battery protection circuit, and the switch can be output by turning ON.

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Question:Can this be connected to a larger battery?

 Answer:

Yes, it supports the 3.7V single lithium battery, and the capacity is not the affecting factor (no special restrictions). We recommend using our matching batteries (with aging test, and more stable)

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Question:What is the exact type of battery header that is used?

 Answer:

Socket straight pin plug-in type PH2.0-2P white:

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Question:Is the UPS HAT also compatible with the Raspberry Pi Zero 2?

 Answer:

Yes, it supports Raspberry Pi Zero 2W.

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Question:Is it possible to use another LiPo with 3.7V and a larger capacity (e.g. 5000 mAh) instead of the 1000 mAh LiPo?

 Answer:

Yes, you can use the 5000mah Li-po battery, and the voltage should be 3.7Volt.

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Question:Shunt Resistor is 0.1 or 0.01 ohms?

 Answer:

The resistor is 0.1.

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Question:I'm trying to setup the real-time monitor for the UPS HAT (C) and I'm getting the below error:

pi-star@dmrteslahs:UPS_HAT_C$ python3 INA219.py
Traceback (most recent call last):
File "/home/pi-star/UPS_HAT_C/INA219.py", line 1, in
import smbus
ModuleNotFoundError: No module named 'smbus'

The I2C is recognizing the board with the address 3x43 but the script fail to start. Any advice please?

 Answer:

Please install the following libraries and test again:

sudo apt-get install python-smbus
sudo apt-get install python3-smbus

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