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Meeting Notes 08/30/2024

1. Pack Characterization - SOC Open-state versus charge

   1. GOAL: Program an Eload to discharge module, and if possible the entire-pack to get discharge curves by September 8th

2. Resistance-Testing Plan

   1. Q: ask Aryan what a general-process of this would look like

3. Vibrational Testing

   1. Learned from co-op that vibrations - (MAIN PRIORITY)

   2. Check-in with Aryan for updates

   3. Suggestion from Blue Sky Solar Car: make 2S2P module and program an eload to discharge the battery and get the discharge curves

• Straight forward

• Data for every-single-cell & entire pack

  • Current sense - pack voltage readings

  • Sum-up AFE readings - programmable multimeter

  • Reading Voltage & Current (5-6 amps - whatever cruise-current draw)

    • laptop inside-car to read amperage

• Q: Current to discharge at?

  • Fraction of the capacity

  • Standard discharge: 1/2 amp

  • Data-sheet

  • 5-6 amps (worst case 10 amps)

• Aryan has a Confluence page: “Custom State of Charge”

• HPPT Battery Testing - 5% + number of hours it will take

2. Resistance-Testing Plan Resistance-Testing Plan

   1. Go over current confluence doc for trying to figure out how to test for very-low voltage readings

3. Vibrational Testing

   1. Vibrations are a way that packs can die

...

2. 1. - internal components can become damaged

   2. Setting up vibrational testing??

      1. Point of reference for before/after changes are made to module and enclosure angular frequency - amplitude of wave = calculate energy

3. Mech/Elec Sync Dates

   1. were these finalized yet?

   2. Did we also want to have weekly Firmware/Battery Syncs?