W25/MS16 planning

Owned by Evan McCarthy
Last updated: Dec 20, 2024
2 min read

MS15.5 todo:

  • Blockers for car running:

    • Harnessing - mostly solved

      • HV inside battery box to be re-crimped

      • Do not harness second motor, tie up wires to prevent damage (disconnect motor from controller)

    • PCS/dcdc

      • I think faults due to heat

      • Install heat sink (brown cardboard box on back hw shelf named “vicor”) - check thermal grease, add if not there

  • Testing

    • Must be done with two motors until rear hub installed by mech

    • Road testing: install 1.6A fuse for DCDC, ensure it doesn’t blow

  • Assembly:

    • 2x PD total (after validation/new resistor calculation, changed UV/OV power path resistors are not in altium)

    • 1x more BMS carrier (unless new is tested/implemented)

  • W25:

    • Focus on getting car on the road, no new projects installed

    • If too many hands, focus on test rigs for new projects

    • maybe solar sense - evaluate after new CB bringup

MS16:

Split battery box:

  • Wires needed:

    • Inside the box:

      • 37 for voltage taps

      • 18 for thermistors

      • 3(+) for current sense

      • 9(+) for contactors

      • 8x for fans

    • Out of the box:

      • 4x CAN

      • 4x power (to CC)

  • Ideas:

    • PD: Battery box cluster (on carrier), everything else cluster (on centre console)

      • 4x connections to CC, 4x to carrier

      • powerpath (or equiv) just on BMS, switching only on CC

 

Overall architecture:

In back box:

  • “combining” board from battery box to BMS

    • fuse here (include PTC < actual fuse)

    • Takes in 37/ribbon cable from taps

    • Takes in cable with thermistors (same ^?)

    • Out: 3x (something) to each AFE with tap and thermistors

  • AFE

    • Connects to combining board (tap and thermistor) and other afe (isospi) only

  • Rear Control

    • Drives 3 relays and motor switch (reg review)

    • Deals with motor controller CAN and power

    • Communicates with AFEs and current sense (isoSPI, iso?)

    • Powerpath (equiv), in from aux and dcdc, power internally, motor controller, 4x out to CC

    • Drives fan(s)

  • current sense:

    • Sits with cells in “HV” area

    • single connection to combining board

  • PCS:

    • in our box

    • Needs HV in and high current out to BMS carrier (in box)

  • Aux battery

    • In our box

    • Direct to carrier (fuse)

  • relays

    • in HV area, 9x+ connections to our box, driven by carrier

    • Perhaps replace motor with fet

  • Fans

    • In HV area

    • 8x to carrier

Not in back box:

  • front controller

    • All current CC stuff

    • 4x power in from rear control, switches lights/everything else

  • Telemetry, Solar Sense, IMU

    • Connects to front control

  • Horn

    • Switched by front controller

  • Pedals

    • Connects to front controller

  • Lights

    • driven by front controller

  • Driver ventilation

    • fans to front controller

  •