This is an interface for a Korad KA3005 bench power supply and scripting that allows computer-controlled CC/CV charging of Li-Ion batteries (e.g., type 18650) along with logging. It has configurable cutoffs for residual current and time cutoffs as well.
First, make sure your home is insured against arson by gross negligence on your side. Then, hook up your battery to your Korad power supply. The charging application has several configurable variables, but sensible defaults:
usage: charger [-h] [--charge-voltage volts] [--charge-current amps]
[--cutoff-current amps] [--cutoff-time hours] [-l filename]
[-v]
device
Korad power supply Li-Ion charging application.
positional arguments:
device Device to connect to.
optional arguments:
-h, --help show this help message and exit
--charge-voltage volts
Specifies charging voltage. Defaults to 4.20 V.
--charge-current amps
Specifies charging current. Defaults to 1.40 A.
--cutoff-current amps
Specifies charging cutoff current. Defaults to 0.06 A.
--cutoff-time hours Specifies charging cutoff time in hours. Defaults to
3.0 hours.
-l filename, --logfile filename
Specifies file to log into. By default, logging is
disabled.
-v, --verbose Increases verbosity. Can be specified multiple times
to increase.
For example, to start the chraging process:
$ ./charger -l my_battery.log /dev/ttyACM0
Then, if you want to plot the log later, you can use the plotting application, which also offers several options:
usage: plot [-h] [-a {voltage,current,mah,wh}]
[-b {voltage,current,mah,wh,none}] [-o pngfile]
logfile [logfile ...]
Li-Ion charging log plotter.
positional arguments:
logfile A charging log or logs that should be plotted.
optional arguments:
-h, --help show this help message and exit
-a {voltage,current,mah,wh}, --axis1 {voltage,current,mah,wh}
First axis content. Can be one of voltage, current,
mah, wh, defaults to current.
-b {voltage,current,mah,wh,none}, --axis2 {voltage,current,mah,wh,none}
Second axis content. Can be one of voltage, current,
mah, wh, none, defaults to mah.
-o pngfile, --output pngfile
Output file to write to. Defaults to
charging_graph.png.
For example, to plot charging current on the Y1 axis and charge in Watt-Hours on the Y2 axis, simply do:
$ ./plot -a current -b wh -o my_battery.png my_battery.log
Before you charge your Li-Ion batteries with a bench power supply, make sure you know what you're doing. If you burn your house down, that's on you, not me. Even if I wrote the code.
GNU GPL-3.
React
Typescript
Django
Laravel
Facebook
Microsoft
Google
Alibaba
D3
Tencent