openinverter forum

christoph wrote: ↑Thu Oct 27, 2022 11:04 am So to check this I have to measure if there's voltage between + <-> GND and - <-> GND. And that if the wire is live, obviously. It should be 0V. Is that correct? I don't want to kill myself, nor the multimeter, nor any car part

tom91 wrote: ↑Thu Oct 27, 2022 1:05 pm That is your call to make if you are not confident in your understanding and ability, do not do any of this. You really need an proper isolation measurement device capable of applying up to 1000V across points.

tom91 wrote: ↑Thu Oct 27, 2022 3:43 pm If you know you have issues with Chademo stations then this is most likely your issue.
Please obtain an isolation tester for better information.

christoph wrote: ↑Thu Oct 27, 2022 3:49 pm It's just one certain one on wet weather. Nothing else. We did not had these kind of problems the last days. But yeah, I get the idea. Dala from Dala's EV Repair, specialized on Nissan Leaf, told me the Check EV light should be turned on in the car if there's a ground error. That is not happening.

tom91 wrote: ↑Thu Oct 27, 2022 4:44 pm So, who has say the Nissan Leaf uses the same threshold as the offboard charger?

tom91 wrote: ↑Thu Oct 27, 2022 9:08 am You have 2 issues one is timing based and the other is isolation based. I have resolved both in my version of coding.

Timing:

Code: Select all

 if(Cont_Volts==0)lim_stateCnt++; //we wait for the contactor voltage to return to 0 to indicate end of cable test
            if(lim_stateCnt>20)
            {
               if(CCS_Iso==0x1) lim_state++; //next state after 2 secs if we have valid iso test
               lim_stateCnt=0;
            }

I changed this to wait for the voltage to drop below 50V before proceeding, the decay of the voltage on the charge port depends on how the charger stages work and if they hard disconnect or not. The Can Log shows a very slow delay for the Efacec.

Jack Bauer wrote: ↑Fri Oct 28, 2022 6:18 pm While I appreciate the contribution (more than you might imagine!) I'll hold off making any changes to the vcu firmware as I have not personally encountered this problem in almost a year of some very intensive CCS charging during a house move.

if(Tmp_Vbatt>Tmp_Vbatt_Spnt)CCSI_Spnt--;//decrement if voltage equal to or greater than setpoint.

christoph wrote: ↑Sat Oct 29, 2022 6:42 pm On Efacec it stops after some seconds of actual charging. But investigating... I made a log...

@@ -808,6 +808,11 @@ void i3LIMClass::CCS_Pwr_Con()    //here we control ccs charging during state 6.
    if(Tmp_Vbatt>Tmp_Vbatt_Spnt)CCSI_Spnt--;//decrement if voltage equal to or greater than setpoint.
    if(CCS_Ilim==0x1)CCSI_Spnt--;//decrement if current limit flag is set
    if(CCS_Plim==0x1)CCSI_Spnt--;//decrement if Power limit flag is set
+
+   // force once more that we stay within our maximum bounds
+   if(CCSI_Spnt>=Tmp_ICCS_Avail)CCSI_Spnt=Tmp_ICCS_Avail; //never exceed available current
+   if(CCSI_Spnt>Tmp_ICCS_Lim)CCSI_Spnt=Tmp_ICCS_Lim; //clamp setpoint to current lim paramater.
+
    Param::SetInt(Param::CCS_Ireq,CCSI_Spnt);
 }

christoph wrote: ↑Sat Oct 29, 2022 6:42 pm It works! On ABB chargers at least. Tested on two different ones.

On Efacec it stops after some seconds of actual charging. But investigating... I made a log...

Thanks everyone involved!

ginetto wrote: ↑Tue Nov 01, 2022 3:18 pm That's my next step after upgraded my 2016 leaf to 62kWh battery with Dala's firmware and can bridge.
I've already LIM module and contactors, I still need:
1) CCS plug
2) voltage sensor to trigger LIM

@christoph could you share schematic and sw you used to trigger carging? is it a legacy Nissan Leaf or with openinverter electronics? Please give here more details. Here in Spain started to install chargers without chademos at all.

christoph wrote: ↑Wed Nov 02, 2022 9:28 am I't's a Legacy Nissan Leaf 2016 with battery upgraded to 40kWh. I'm currently working on simulating a Chademo charge. There will soon be a blog post on EVCreate (Lars') blog describing the project.

Eltis wrote: ↑Fri Nov 04, 2022 12:01 pm I have this board connected. the seventh byte I'd 3b4 has the value 00.

Eltis wrote: ↑Fri Nov 04, 2022 3:31 pm Thank you. I have lim 2014 USA.

asavage wrote: ↑Fri Nov 04, 2022 10:20 pm ...646?
https://openinverter.org/wiki/BMW_I3_Fa ... M_versions

tom91 wrote: ↑Fri Nov 04, 2022 12:16 pm Provide a capture if you need help. There are many things that can be an issue. you need to depending on the serial number you might need to run a contactor test as described in this thread and on the wiki page.