MIA electric

sandbox

CAN-bus sniffing

• parts
  • Arduino UNO R3 (or CH340 clone EUR 6,49)
  • MCP2515 / TJA1050 shield (8MHz EUR 4,79)
  • https://github.com/latonita/arduino-canbus-monitor (MCP_8MHz, CAN_500KBPS)
  • OBD-II connector: Pin-6=CAN-high / Pin-14=CAN-low
  • CANcool https://github.com/MHS-Elektronik/CANcool

CANcool

• website
• forum
• sources

'Berechnungs-Term'

• operators:

+  // addition
-  // subtraction
*  // multiplication
/  // division
<< // Bit shift left
>> // Bit shift right
&  // AND
|  // OR
~  // XOR

• variables:

d0 1st byte (decimal)
d1 2nd byte (decimal)
d3 3rd byte (decimal)
d4 ... 
d5 ...
d6 ...
d7 ...

• samples:

d0                                                                 // unsigned char (8-bit)
(d0 - ((d0 >> 7)*256))                                             // signed char (8-bit) Two's complement
((d0 << 8) + d1) ^= MSB * 256 + LSB                                // unsigned short (16-bit)
(((d0 << 8) + d1) - ((d0 >> 7)*65536))                             // signed short (16-bit) Two's complement
((d0 << 24) + (d1 << 16) + (d2 << 8) + d3)                         // unsigned integer (32-bit)
((d0 << 24) + (d1 << 16) + (d2 << 8) + d3)-((d0 >> 7)*4294967296)) // signed integer (32-bit) Two's complement

256 = (1 << 8)
65536 = (1 << 16)
16777216 = (1 << 24)
4294967296 = (1 << 32)

DC charging

CCS

• prerequisites
  • explore V2G protocol
    • http://openv2g.sourceforge.net
    • http://openv2g.org
    • https://www.v2g-clarity.com/en/risev2g
  • discover BMS <> Charger CANbus conversation
    • BMS/Battery e4v.eu
    • onboard charger ies-synergy.com
  • develop BMS <> PCL communication

• parts
  • CCS-socket e.g. Phoenix Contact ~EUR 800,-
  • input voltage monitor
  • power contactor (+125A disconnecting device) Tyco ~EUR 150,-
  • current monitor
  • V2G in-vehicle-charge-controller e.g. EVAcharge SE ~EUR 750,-
    • ARM microcontroller
    • Linux OS
    • fully programmable
    • PWM duty cycle detection (CP low level communication)
    • switchable resistors (CP low level communication)
    • HomePlug Green PHY integration (PLC high level communication)
    • Proximity pilot signal input (PP)
    • lock-motor output
    • lock-motor end switch input
    • lock-motor fault pin
    • CAN transceiver (BMS communication)
    • 6 GPIOs (current-monitoring?, voltage-monitoring?, temprature-monitoring?, power contactor-driver?, (contactor-monitoring?))

• docs
  • http://tesla.o.auroraobjects.eu/Design_Guide_Combined_Charging_System_V3_1_1.pdf