Main Traction Battery Upgrade i-MiEV

[piev]

Good point, we know from commercial solutions that they are able to limit the CHAdeMon power after NMC cell upgrades. I gather that they’re applying an official Mitsu ‘update’, does anyone have further details?

Pretty sure you can do this with the CAN bridge. I know the OBDZero app can monitor the charge profile so the data has to be on the bus. Does it go from the battery to the ECU or through the BMS. Pretty sure it goes through the BMS in which case you could change the current being requested. I do know that the charging has a different current sensor than the pack but I don't know details. I believe that Kiev figured this out. I could be wrong. Maybe I'll spend some time snooping around now that I have a MiEV again.

 

[hat]

Good point, we know from commercial solutions that they are able to limit the CHAdeMon power after NMC cell upgrades. I gather that they’re applying an official Mitsu ‘update’, does anyone have further details?

Thank you.
It is possible that a software "update" could limit the upper limit of the fast charging current. However, this forum has not yet discussed "updates."

 

[hat]

Pretty sure you can do this with the CAN bridge. I know the OBDZero app can monitor the charge profile so the data has to be on the bus. Does it go from the battery to the ECU or through the BMS. Pretty sure it goes through the BMS in which case you could change the current being requested. I do know that the charging has a different current sensor than the pack but I don't know details. I believe that Kiev figured this out. I could be wrong. Maybe I'll spend some time snooping around now that I have a MiEV again.

This is a way to convert current data using a CAN bridge without "updating" the software.

 

[MickeyS70]

Pretty sure you can do this with the CAN bridge. I know the OBDZero app can monitor the charge profile so the data has to be on the bus. Does it go from the battery to the ECU or through the BMS. Pretty sure it goes through the BMS in which case you could change the current being requested. I do know that the charging has a different current sensor than the pack but I don't know details. I believe that Kiev figured this out. I could be wrong. Maybe I'll spend some time snooping around now that I have a MiEV again.

Yes, I hope so. While the CAN communication between the EV-ECU and CHAdeMon EVSE is separate and charging limits are probably set on that level, the BMU seems ultimately in control as it’s monitoring the HV battery.

I gather it sends a ‘target current request’ to the EV-ECU which is then forwarded to the EVSE. If that’s the case, it should be easy enough to limit this value with a bridge if we only knew it’s PID?

@kiev has recently added some interesting info:
https://myimiev.com/threads/whats-all-this-chademo-can-buss-stuff-anyway.5727/

 

[hat]

Thank you.
I understand the information about CAN communication.
I can adjust the maximum current value to the NMC.

 

[Negue]

I know at Leaf that Can bridge can limit charging (30+kwh)

 

[MickeyS70]

I know at Leaf that Can bridge can limit charging (30+kwh)

Yes, that is where I found the information about the ‘target current request’, assuming this to be similar on a triplet…