BMS/SoC/Telemetry Meetings

• we may not have telemetry capabilities and may need to estimate SoC locally

• STM32 constraint

• need a validation plan for algorithm

• be ready to implement and test

• held up by hardware development

• not urgent

• need to validate with real motor operation…

• lots of critical path tasks

https://www.instructables.com/Long-Range-18km-Arduino-to-Arduino-Wireless-Commun/

Open

• transmitter placement + verify range

• restricted frequencies? power recs? government regs

• multiple frequencies? interference

Goal 1 (September 31st): Send a 3-bit number over 1.8km (w/ simulated interference).

Goal 2 (TBD): Finalize coulomb-counting strategy and exact requirements for telemetry

Goal 3 (TBD): Hardware Integration

• Networking for Strategy Laptop

  • Need Katharine to explain to Strategy

    • Need to hardwire the laptop into a port at the school.

      • I have an adapter that works for a certain amount of bytes

    • Cannot be 801.2x enabled (authentication required)

    • The amount of data being pushed would be helpful to know

    • Test SSH capabilities

    • If that doesn’t work, will contact local IST to figure out alternate method

    • Cannot use router since it’s kinda pointless anyways

• Coulomb Counting Script

  • Rudimentary script written by Ryan

  • Kostubh and Owen can test script next term

  • How to improve script?

    • We can improve based off research papers

    • Can compare script with actual battery to determine accuracy

    • Ryan needs average current draw data

• Telemetry

  • RF transmitter is in bay

    • understand how to use

    • Make sure that it follows all RF protocols, it cannot interfere with other devices

    • Ensure that the frequency chosen had the desired range and avoids forbidden frequencies

      • There is a list, make sure to check regulations for the race location (should be pretty standard)

        • Eg. military frequencies

    • Make sure that the material of the car does not cause issues

      • Generally, concrete interferes the most, but there will also be no clear path for the signal

      • RF technically does not need a direct pathway, but range is affected

      • The signal needs to go through several layers and an external antenna cannot be attached due to the nature of the aero body design

    • Test with changing the receiver sensitivity, noise will be high during the race

  • Strategy needs more information about this

hardware situation? continue isabella’s work?

of-the-shelf bms with CAN out to MC?

talk to shaumav - progress?

number of afe’s? inputs from each module?

router to esp32 fidelity?