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titleMeeting Minutes 2023/09/20

PVDR Battery Test Plan Review

Solar Testing

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titleMeeting Minutes 2023/09/20

Coulomb counting

  • Decided to go with on-vehicle SoC calc with max17261.pdf on current sense

    • CC by itself is not sufficient due to drift, algo needs to integrate vsense to anchor CC mesurements

    • Developing in-house SoC algo is difficult and unsure of what accuracy will be

  • Eric’s notes: https://uwmidsun.atlassian.net/l/cp/oPkT0eia

Solar Irradiance

  • Has theoretical power of one array using pysolar

  • Next steps:

    • Model all panels + effects of aero curvature

    • Obtain power for a given route

    • Add weather effects

    • Account for system efficiency over varying loads

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titleMeeting Minutes 2023/07/19

Solar Testing

  • Solar panel connected to MPPT

    • 7x4 stack, 1 mppt, connected to dc load

    • Panel lying flat with protective film

    • dc load set to 25V, 60W as measured at load with no clouds

    • Dropped to 45W with clouds

  • Compared with protective film vs without 100W vs 125W without

    • 56 cells (200W max → 63%)

    • Voc -> 19v

    • Isc → recorded

    • Both MPPTs connected series

  • Alastair Correya (Unlicensed) to update confluence tmrw

  • Tested with batteries as well, similar power to eload

  • Spoke with Elmar, set output pot so that they are proportional to stack sizes

Battery Box Board Mounting

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