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To validate the "completed" battery modules, it is essential to conduct a full charge-discharge test while monitoring key system parameters such as voltage and temperature. While the continuous discharge of modules at 40+A is unlikely, this validation procedure functions as a stress test.

Initiate the procedure by charging the module to 16.6V (below the maximum to provide a health-span buffer).

Charging

Owen Li to complete the procedure.

Discharging

Equipment

• BK Precision 8600 E-load

• Rigol DL3031 E-load

• 6, 18AWG wires with banana connectors

• A2D DAQ w/ thermistors

• USB to USB B (Data-Transfer Cable)

• Windows Laptop

Software Setup

• Follow the provided instructions: https://github.com/kostubhagarwal/module_test_data_acquisition

Procedure

1. Run serial_to_csv.py to check the functionality of the thermistors (only working thermistors will show readings on the terminal).

2. Pause (Ctrl-C) serial_to_csv.py, then complete the physical setup.

3. Connect working 6 thermistors to the battery module busing

   1. use electrical or kapton tape. ensure good contact!

   2. connect to 6 different spots on the module as shown

4. Connect E-Loads to battery module as shown DONT MESS UP THE POLARITY OF TERMINALS

   1. two wires (one for each terminal) to connect BK Precision 8600 E-load to the battery module

   2. use four wires (double-up for each terminal, as wires are not rated for 30A) to connect Rigol DL3031 E-load to the battery module

5. Set BK Precision 8600 E-Load to 10A CC draw

6. Set Rigol DL3031 E-Load to 30A CC draw

7. Run serial_to_csv.py

8. Start both e-loads

9. Once modules reach 11V (to prevent draining module past safe spot) stop the e-loads

10. Terminate (Ctrl-C >> 2) serial_to_csv.py

11. Save the 'data.csv' file with a different name, as it will be overwritten during the next run of serial_to_csv.py.

12. Follow charging procedure to charge battery pack to 13.2V, this leaves cells at 3.3V which is a good storage voltage.