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Objective:

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Prototyping (OCV & Impedance)

1. Find the required equipment on the table at the back of the Bay:

   1. Keysight Digital Multimeter

   2. Rigol E-load

   3. Katharine’s laptop + charger

   4. Gamry Universal Cell Holder

   5. Sharpie

   6. 4x Alligator clip / Banana plug wires

   7. 2x Serial USB cables (should be plugged into or near the equipment)

   8. Power cables for the equipment (should be plugged into or near the equipment

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2. Move equipment to a table with outlets (I couldn’t find any nearby outlets on that table).

   1. make sure not to drop anything lol expensive stuff

3. Use the banana plug to banana plug wires to connect the +S and -S terminals on the battery holder to the digital multimeter HI input and LO respectively.

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4. Use the banana plug to alligator clips to connect the +F and -F terminals on the battery holder to the INPUT + and - on the E-load respectively.

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5. Turn on Katharine’s laptop (and plug it in to charge it)

6. Open the MS Battery Testing folder, right click inside of it, and click “Open in Terminal”

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7. Type in the following to run Micah’s testing script:

   Code Block
   python battery_test.py

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8. Click OK (1 battery channel)

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9. Click on File->Import Equipment Assignment

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10. Select equipment_assignment (located in Documents → Single Cell Testing Data → Full Settings (i think lol, might need to do some digging around but its around there))

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11. Click Import Test

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12. Select rest_ir_test

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13. Pick up a cell from the packaging (or just bring the whole box over)

    1. The cells are in two boxes at the bottom of the shelves

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14. Number the box that it came in, and the cell itself with Sharpie

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15. Place in the Gamry cell holder with a Keysight 34410a

16. Measure the OCV of the cell 

17. Collect the IR via the Keysight 34410a

18. Add data to the designated row: MSXV_celltracking

19. Place the cell in a box labelled ‘Tested’

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20. Click Edit Cell Name

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21. Type in whatever number the cell you’re testing is, and OK

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22. Start the test (screen should look something like this when it’s set up

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23. Let the test run, it will do a 1 second rest, a 5 second low current (0.1C) discharge, and a 5 second higher current (0.4C) discharge, for a total of 11 seconds per cell. It should look something like this.

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24. Wait until the Current Status is Idle, then repeat through steps 13-19 for each cell. MAKE SURE TO EDIT THE CELL NAME BEFORE EACH TEST

25. All the data will be saved by the script automatically to the Single Cell Testing Data folder.

26. At the end of the testing session, ZIP the single cell testing data folder and send it to the slack channel.

27. Put everything back to where it was before!

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28. I will make a small script that uses Micah’s GraphIV python script to analyze the data once it’s all collected.

29. Thanks!!!!!
    

Production (Capacity) [DRAFT]

1. Place cells into [parallel cell charger(s)]

2. Charge cells at 1.45A (well below the standard charge spec [5]) 

3. Observe the thermal performance of batteries via thermistors/heat gun [optional]

4. Once fully charged, allow the cells to rest for 10 mins (recommended per spec sheet [5])

5. Commence discharge on [parallel cell charger(s)] at 1.70A

6. Once fully discharged, record values in the following MSXV_celltracking

7. Allow the cells to rest for 20 mins

8. Charge cells at 1A (well below the standard charge spec [5]) 

9. Observe the thermal performance of batteries via thermistors/heat gun

10. Once fully charged, allow the cells to rest for 4+ hours for the temperature to normalize temperature

11. Place all batteries in a box until module/pack assembley - when placing them in your module, check ocv and make sure it hasn’t dropped to much (self-discharge check), if discrepancies: record in MSXV_celltracking

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