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A simple 18650 Lithium Ion battery tester based on a raspberry pi, with the hardware schematics and python program and GUI.

License: GNU General Public License v3.0

Python 100.00%

raspberry batteries spi lithium-ion 18650

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doriangrappe amoeez dronesnduions hatruong2k31 gjaime

18650_tester_software's Issues

Include the possibility to charge the batteries in the device

Add real-time estimation of the total time of the test / capacity of the battery

Use mosfets instead of solid-state relays and create PCB

Different resistor

is it possible to use diffrent resistor ? in my local electronic shop do not have 4R/5W only have 4R3/5W,will the indications be very different? need to change the resistor value in the program?

Add more battery slots

Can't install

Hello, when i try to install tester software i have an error and don't know what to do next.

pi@raspberrypi:~ $ sudo su
root@raspberrypi:/home/pi# sudo apt install python3 -y
Czytanie list pakietów... Gotowe
Budowanie drzewa zależności
Odczyt informacji o stanie... Gotowe
python3 is already the newest version (3.7.3-1).
0 aktualizowanych, 0 nowo instalowanych, 0 usuwanych i 1 nieaktualizowanych.
root@raspberrypi:/home/pi# sudo pip3 install --upgrade setuptools
Looking in indexes: https://pypi.org/simple, https://www.piwheels.org/simple
Collecting setuptools
  Downloading https://files.pythonhosted.org/packages/4e/2e/f8e006dbaaa46ed1e762c287585b92476deb8d3ccb79b720ed3b86bc6113/setuptools-58.1.0-py3-none-any.whl (816kB)
    100% |████████████████████████████████| 819kB 537kB/s
Installing collected packages: setuptools
  Found existing installation: setuptools 58.0.4
    Uninstalling setuptools-58.0.4:
      Successfully uninstalled setuptools-58.0.4
Successfully installed setuptools-58.1.0
root@raspberrypi:/home/pi# sudo apt-get install -y python-smbus
Czytanie list pakietów... Gotowe
Budowanie drzewa zależności
Odczyt informacji o stanie... Gotowe
python-smbus is already the newest version (4.1-1).
0 aktualizowanych, 0 nowo instalowanych, 0 usuwanych i 1 nieaktualizowanych.
root@raspberrypi:/home/pi# sudo apt-get install -y python3-tk
Czytanie list pakietów... Gotowe
Budowanie drzewa zależności
Odczyt informacji o stanie... Gotowe
python3-tk is already the newest version (3.7.3-1).
0 aktualizowanych, 0 nowo instalowanych, 0 usuwanych i 1 nieaktualizowanych.
root@raspberrypi:/home/pi# sudo apt-get install -y i2c-tools
Czytanie list pakietów... Gotowe
Budowanie drzewa zależności
Odczyt informacji o stanie... Gotowe
i2c-tools is already the newest version (4.1-1).
0 aktualizowanych, 0 nowo instalowanych, 0 usuwanych i 1 nieaktualizowanych.
root@raspberrypi:/home/pi# sudo i2cdetect -y 1
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:          -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --
root@raspberrypi:/home/pi# ls -l /dev/spidev*
crw-rw---- 1 root spi 153, 0 wrz 28 16:07 /dev/spidev0.0
crw-rw---- 1 root spi 153, 1 wrz 28 16:07 /dev/spidev0.1
root@raspberrypi:/home/pi# pip3 install -f requirements.txt
ERROR: You must give at least one requirement to install (maybe you meant "pip install requirements.txt"?)
root@raspberrypi:/home/pi# cd //home/pi/18650_tester_software/
root@raspberrypi://home/pi/18650_tester_software# pip3 install -f requirements.txt
ERROR: You must give at least one requirement to install (maybe you meant "pip install requirements.txt"?)
root@raspberrypi://home/pi/18650_tester_software#

my system :

PRETTY_NAME="Raspbian GNU/Linux 10 (buster)"
NAME="Raspbian GNU/Linux"
VERSION_ID="10"
VERSION="10 (buster)"
VERSION_CODENAME=buster
ID=raspbian
ID_LIKE=debian
HOME_URL="http://www.raspbian.org/"
SUPPORT_URL="http://www.raspbian.org/RaspbianForums"
BUG_REPORT_URL="http://www.raspbian.org/RaspbianBugs"

installed python

Python 2.7.16 (default, Oct 10 2019, 22:02:15)
[GCC 8.3.0] on linux2

what am missing?

Add voltage drop at load connection as indicator

Discharge the batteries with a constant current ?

Add a voltage reference to the Vref of MCP3008

this way you eliminate the error factor added by the voltage changes of the source, of course now you will have to use 2 voltages to feed the circuit but the improvement of precision is considerable. The more expensive the ref the better the precision. (I have been using a piece of code in the atmega328p that allows to compare the vcc with an internal ref of 1.1v, it is not perfect but using some batteries that were practically new. I have measured an error of + -100mah which is acceptable to me from moment)

https://datasheet.lcsc.com/szlcsc/Linear-Tech-LT1029ACZ-PBF_C117263.pdf

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