Several resistance values are averaged from each channel's reading on our battery testers. So if you are filling in the battery CSV, you can run avg_res.py for easy average resistance calculations.
If you are assembling battery modules, run main.py on the battery CSV to spit out which cell belongs in which module.
- Reads some resistance values from the user (one resistance per channel in our battery testers).
- Displays the average of the resistances.
Open the command prompt in the same directory that avg_res.py is in. Type the following command:
> py avg_res.py
- Reads data from a
CSV filecontaining a cell ID, capacity, and internal resistance for any number of cells. That data is stored into a list for easy manipulation. - The batteries are sorted in ascending order first by resistance then by capacity.
- The battery cell numbers along with information about each cell is then outputted to the screen by module as assembly instructions.
The input CSV file should look like this:
| Cell Number | Capacity | Internal Resistance | Module |
|---|---|---|---|
| 1 | 3000 | 75 | 1 |
| 2 | 3380 | 80 | 1 |
etc.
With commas ( , ) as the delimiters.
Open the command prompt in the same directory where main.py and the CSV file containing the data are located. Run the following command:
> py main.py <filename>
Where <filename> is the CSV file.
If you omit <filename> the program will use the first csv it finds in the directory the script is running in.
It is highly possible that in the future, the structure of the battery pack will change and therefore the batteries will need to be characterized differently. The code present in this project is generic enough to be used on future packs with only minor tweaks such as the alteration of the following constants:
PACK_CELLS = 420
MODULE_CELLS = 12
These variables govern the number of cells in the pack as a whole and the number of cells per parallel grouping (module) respectively.