CAN Communication Board Design

flux

Work completed
  • Microcontroller & CAN Interface (all sub-steps)
  • BMS setup (all sub-steps)
  • Power tree and EMI filters
  • CAN-to-MCU and BMS interconnections on schematic
  • Connected CAN bus nets (TX/RX, choke, termination, TVS)
Tasks remaining
  • Design & Verification:
    • Run ERC/DRC checks for high-current and isolation clearances
    • Review part availability and update BOM
  • Net connections on BMS AFE:
    • Add DatasheetURL property to the 7-series Li-ion BMS AFE component
    • Retrieve pin descriptions for pins 1–7 and set CellPin1Name–CellPin7Name
    • Rename AFE cell voltage pins to Vcell1–Vcell7
    • Wire Vcell1–Vcell7 to the cell tap connector
    • Connect thermistor, current-sense, contactor-driver, precharge, VIN protection, and pack-connector nets
Success criteria
  • ✅ Isolated J1939 CAN interface with termination, ESD, choke
  • ✅ MCU with CAN integrated
  • ✅ 7-series BMS AFE and supporting circuits placed
  • ✅ 12 V, 5 V, 3.3 V rails defined with regulators and filters
  • ⚠️ ERC/DRC checks not yet run
  • ⚠️ BMS AFE pin properties and net wiring incomplete
Recommended next step
Run ERC/DRC checks to verify clearances, then complete the remaining net connections and update the BMS AFE pin properties and datasheet link.
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    Assets

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    High-Current 28V 7S Li-Ion Battery Management System with Integrated CAN J1939 and Advanced Power Management

    Properties

    Diagram
    


  
    
  
  
    
  



Power Tree


Microcontroller & CAN


BMS System

































"3.3V, node_5V, node_12V"

"3.3V, node_5V, node_12V"

"3.3V, node_5V, node_12V"

"CAN_TX/CAN_RX"
























"28V Input"
"12V Buck Regulator"
"12V Rail"
"5V Buck Regulator"
"5V Rail"
"3.3V Regulator"
"3.3V Rail"
"Inductor & EMI Filter"
"Inductor & EMI Filter"
"Inductor & EMI Filter"
"Microcontroller w/ CAN"
"Isolated CAN Transceiver"
"Common-Mode Choke"
"Selectable 120Ω Termination"
"ESD Protection"
"J1939 CAN Connector"
"7S Li-ion BMS AFE"
"Cell Voltage Taps"
"Current Sense (Shunt/Hall)"
"NTC Thermistors"
"Contactor Driver"
"Precharge Path"
"TVS, Fuse, Reverse-Polarity FET"
"Pack/Charger Connector"

    Pricing & Availability

    Distributor

    Qty 1

    Arrow

    $2.92–$4.18

    Digi-Key

    $4.09–$5.24

    LCSC

    $6.58–$6.73

    Mouser

    $5.82

    TME

    $0.29

    Verical

    $10.37–$13.20

    Controls