dalathegreat / Nissan-env200-Battery-Upgrade

Software for upgrading a 24kWh env200 to 40kWh with a Muxsan CAN-bridge

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Charge timer and charge limit no longer working

phoenixs3 opened this issue · comments

After upgrading from 24kwh to 40kwh, the 80% charge limit and the charge timer no longer seem to function. Have these been successfully tested by someone else with this code running?

Yes, I can confirm the dashboard 80% charge limit doesn't work on my upgraded 40kWh e-NV200 either. I've not tested the timer I've never used it. I presume the 80% charge limit was a feature of the 24kWh battery, since stock 40kWh e-NV200 do not have an 80% charge limit either.

However, not having a charge limit is not a big issue since OVMS now supports remotely stopping a charge and setting a charge limit.

I can confirm, that the newer battery packs don't understand the 80% longlife option at all. However, it would be possible to code this into the CAN-bridge for users that don't have OVMS.

The 0x1F2 message sent by the VCM contains a parameter called "TargetChargeSOC". This bit has two values, 0=100% and 1=80%. In theory, we could quite simply intercept this, and force a charge stop via the same mechanic as OVMS does.

Seb / Glyn, incase anyone of you wants to test this, let me know and I can code up a test.

I would be happy to test this since my Mums van doesnt have OVMS and she wouldnt want to add it. Only catch is the van is up in Scotland, so I wouldnt be able to apply the SW update until I go and see her next (likely around 1 months time) However if your able to add the software feature in I can flash it as soon as i am up with the van. Also any idea why the charge timer doesnt work?

Seb / Glyn, incase anyone of you wants to test this, let me know and I can code up a test.

Sure, I'm happy to help test. Getting rid of the 80% limit was a silly move by Nissan IMO

I created a branch for this feature (3417a4d)

Here is a .hex file also incase someone wants to try it without compiling:
can-bridge-env200.zip

Thanks I will provide feedback when I can test it!