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ppinheiro76
Issues with Nissan e-NV200 40kWh 2018

Hello to all! First and foremost, thank you all for the incredible amount of work from all the community, the end product/service are amazing.

We have an e-NV200 40kWh (MY18). For the most part, the most important features are working, but I would like to see if I could help the members who are developing the Leaf/eNV-2000 code to solve some important issues.

The main problem I'm having is with wrong voltages in the high-voltage subsystems, related to charging, both on AC and DC.

On AC charging, OVMS is showing me the right amperage (25A vs ~25,4A measured), but it always shows 179V instead of the separately measured 215V. Therefore it thinks the AC stack is getting ~4.5kW instead of ~5.5kW.

On CHAdeMO, it is showing 230V@92A (~21kW), when the rapid charger was supplying 43kW. In this case, I believe both the amperage and the voltage are wrong.

Is there anyone working on this I could assist with measurements to fine tune the PIDs scaling for this vehicle?

Thank you in advance!

Drc38
It would be good to get some

It would be good to get some actual measurements of the output from the onboard AC charger. The voltage and current may not be what is expected based on the EVSE, but the power should be close allowing for >90% efficiency.

On CHAdeMO there was a scaling factor of 2x required to get close to the DC charger kW output ie 460V with 120A max current. This should be in the `edge` version already for vehicles whose chargers report using 0x390.

ppinheiro76
Thanks for the reply. How

Thanks for the reply. How should I go about measuring the output of the onboard AC charger, is there a safe location on the stack that I can connect a multimeter to? Regarding the efficiency, 179 vs. 215 would mean I was getting only 83% efficiency, which is not impossible, but it seems a bit on the low side.

Regarding the CHAdeMO voltage, that appears right. Do you have any idea when the current edge version will become the main stable version? Thanks in advance.

 

 

Drc38
Not sure on access to charger

Not sure on access to charger. In terms of monitoring charger efficiency are you using the new metrics v.c.power and v.c.efficiency? At low charge rates the current resolution of 0.5A will introduce an error of up to c. 180-230W depending on if voltage reading is accurate. So best to monitor these at 16A charge rate if you can.

ppinheiro76
I'm using whatever the app

I'm using whatever the app shows me, I'm not sure which. And I charge at between 24A and 29A.

Janik
Janik's picture
On AC charging, OVMS is

On AC charging, OVMS is showing me the right amperage (25A vs ~25,4A measured), but it always shows 179V instead of the separately measured 215V. 

I have a similar problem.

Server address: ovms.dexters-web.de

 

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