MSXV Harnessing - Electrical Mock-up

Useful links:

Power Distribution

MSXV LV Power Budget

1/20/2024

• took out solar array for measuring/layout session

  Open

  

Open

12/02/2023

TO-DO: finalize lights wiring (gauges + lengths)

22 AWG for all LV systems!!!!

• could also use 18 if 22 is too sus…

• crimps for 22 AWG available!

to-do: make calculator for wire length, current in - power loss out

make table for harnessing wire lengths

3 solar relays

to begin wiring things beginning of next term

DEADLINE: beginning of next term

Short term items:

• clean up mockup spreadsheet

• do battery box enclosures

• solar harnessing ideas

PD Outputs

11/25/2023

All possible board mounting locations

• entire roof panel available

• chassis nose

• 59cm L x 47 cm W

• AVOID THE MIDDLE (steering column)

• aero nose

• also avoid middle! (rib)

• Lights

•  

  • 6 turn signal lights (yellow)

  • 3 in parallel (for either side)

  • 3 brake lights (red)

  • all in parallel

  • 2 headlights(white)

  • parallel

  • 1 bps fault ubducator (white)

  LOCKED ELECTRICAL SYSTEM CENTRAL LOCATION

• table for mockup!

11/21/2023

• AFE voltage taps

  • need fuse so it doesn’t go > 10 mA

  • instead use super thin gauge wire

    • could be harnessing task…

• PD size

  • 10 x 13 (14?) cm

    • confirmed its 10 x 14 cm

• use 22 gauge wire where possible

• for HV DCDC-in, maybe 14?

• for HV solar, around 10-12 awg (the max you can to reduce resistance)

• for HV motor & pack, use ~4 gauge wire in bay

•  

• TO-DO: figure out daisy chain controller board

  • ideally one terminating resistor pair in enclosure

    • only two CAN wires coming out instead of 4 otherwise

Wire Gauge Speccing

• Working session this Saturday!

Tasks:

• Aden - PD

• Owen - Battery Enclosure

• Yanshen + Jason - Driver Controls

CRITICAL:

• mechanical locations of boards!!!

• roughly every possible place to put boards

IN-PERSON WORKING SESSION Saturday, Nov. 25th - 1:00 PM

Proposed Path (PD-CC-Steering):

• can’t be over battery box because they remove from the top

• can’t be on side flange since it’s difficult to get to - Michael

• figure out area size needed, then reach out to @Michael Hanley to figure out proper area for PD

Battery Enclosure Circuits

LV:

HV:

8/27/2023

• created + cleaned up MSXV Electrical Mockup Connections google sheet

• Hardware Board Enclosures review

  • harnessing sheaths

    • combine common wires (i.e. GND) and splice them OR keep each wire separate but in common “casings”

  • FRONT ENCLOSURE TO REAR/BATTERY/CANOPY

    • run from sides following chassis tubes

  • REAR/BATTERY TO CANOPY

    • wiring needs to not restrict opening of canopy

      • Proposed path: Rear → Front → Rear (on side of canopy) → canopy

    • REAR/BATTERY TO TAIL

      • most direct path

    • UPDATE 28/08/2023: battery box ports will likely be on top of the front of our enclosure and maybe one or so on the lid for the AFEs

• TO-DO:

  • work on PD/BMS portion of MSXV Elec Connections Google Sheet

    • remember to spec out wire gauges + length estimations!

7/26/2023

• looking into harnessing softwares

  • Siemens

  • Solidworks Electrical

  • Solidworks Mechanical (extruded-circle for wire)

  • possibly no wiring CAD

• mock-up diagram finalization

  • @Forest Zhou for update

• MSXIV Excel Wiring Tracker

• Wiring speccing

  • look into MSXIV Electrical VDR

• Task Delegation

  • break down by HV, LV; between enclosures

  • new-member friendly: speccing components (connectors, wires)

    • digikey skills, decision matrices, etc.

Reference Vehicle Assembly Photos