Nissan Leaf Gen2 (AZE0-2013) EVSE CP signal in CAN

[lahiruprasad]

Hello,
I am in a process of adding an additional 3kw OBC (not a Nissan Leaf PDB) to run along with the present OBC of my 2013 AZE0 so that I can charge the car with 6kw power. I purchased an EVSE supporting 32A. What I need to do is to make the second OBC to only charge when the CP signal is equal or above 50% of the duty cycle. I know I cannot share the CP with both OBCs. I was looking for a CAN message from the PDM which indicates the cable capacity but I could not find any. I cannot use the max charge limit sent by the BMS or VCM and use it to switch on the second charger without confirming the cable capacity of the EVSE. Is there any expert who knows where should I look in to get an idea?

TIA

[johu]

Wouldn't it make more sense to swap the PDM for the 32A one?

[uhi22]

You could measure the PWM on the CP e.g. using an Arduino, make some plausibilization and use the result to create a separate CP PWM for the second charger.

[arber333]

Hello,
I am in a process of adding an additional 3kw OBC (not a Nissan Leaf PDB) to run along with the present OBC of my 2013 AZE0 so that I can charge the car with 6kw power. I purchased an EVSE supporting 32A. What I need to do is to make the second OBC to only charge when the CP signal is equal or above 50% of the duty cycle. I know I cannot share the CP with both OBCs. I was looking for a CAN message from the PDM which indicates the cable capacity but I could not find any. I cannot use the max charge limit sent by the BMS or VCM and use it to switch on the second charger without confirming the cable capacity of the EVSE. Is there any expert who knows where should I look in to get an idea?

TIA

I used 3x Outlander chargers wired to 3x transistor modules that translate PWM signal from original Cp protocol. Mind you you really need additional transistors because otherwise resistor divider will pull signal down to 6V and even OEM charger will stop.
https://leafdriveblog.wordpress.com/202 ... e-control/
https://leafdriveblog.wordpress.com/202 ... l-part-ii/

There is the code i use.
I think you could simply make one DUE or similar controler translate PWM from Cp signal when Cp would be greater than 50% duty. If no then 0V signal.