What's all this Chademo CAN Buss stuff anyway?

[kiev]

Turns out, like most car stuff, there are spec documents that define everything. So no surprise that the Chademo port has a CAN Buss.

The vehicle talks on Pids 0x100, 101 and 102.

The charger uses Pids 0x108 and 109.

Chademo is being phased out in many places so this is late to the show, but we might be able to figure how to send current out.

 

[kiev]

The vehicle pids


Maximum battery voltage
0x100[5, 4];
Max 0 2 5 8
16 bit, (High byte: 5, Low byte: 4)
1V/bit, 0 V to 600 V

Charged rate reference constant (for display)
0x100[6];
Fix 6 4
8 bit, 1% / bit, 100% (fixed)

Maximum charging time
0x101[1];
Max F F
8 bit, 10 s/bit, 0 s to 2540 s,
“0xFF” indicates use byte [2]

Maximum charging time (by minute)
0x101[2];
Max F F
8 bit, 1 min/bit, 0 to 255 min

Estimated charging time (by minute) 0x101[3];
Max F F
8 bit, 1 min/bit, offset 1, 0-254 min

Total capacity of battery (Optional)
0x101[6 5];
Max F F F F
16 bit, (High byte: 6, Low byte: 5)
0.1 kWh/bit, 0.0–6553.5 kWh

 

[kiev]

The charger Pids

 

[kiev]

Chademo wiring and charger side connector pinout





This is the spec numbering scheme, note that the port numbering is different for each manufacturer for some reason, so be careful when digging.

 

[kiev]

Vehicle side schematic and connector pinout could go here
Mitsubishi
Nissan
Other