Does anyone with CCS Upgrade around here downgraded the f/w afterwards and then noticed during supercharging or CCS-charging (with a warm battery) a degraded charge rate?
I've recently had to update to 2020.36.11 for getting the CCS update via ranger, afterwards another visit at a SeC to fix unlocking/start/etc. via app (*). Then a downgrade straight back to 2019.12.1.1 to get the max brick voltage cap and the charging rate taper removed.
Diagnostic Mode of MCU showed Nominal Full Pack Energy: 67.3kWh w/ 2020.36.11 and jumped back to 73.1kWh w/ 2019.12.1.1
So far I've only charged a couple of times at an ABB 50kW CCS/CHAdeMO charging point, w/ 2020.36.11 the max charge rate of 48kW started to be going down at 60% soc was down to 37kW at 75% soc. With 2019.12.1.1 it kept 48kW until ~75% soc and then declining below 40kW at ~85% soc... I'm looking forward to my next long distance trip to see how SuC performance is.
Keep in mind, it is even worse than the %soc seems to suggest, since...
2020.36.11 vs. 2019.12.1.1
4.11V 4.2V =>> max Brick Voltage
96% soc 100% =>> actual max %soc when charging w/ DC or AC before BMS signals stop
67.3kWh 73.1kWh =>> Nominal Full Pack Energy according to onboard Diagnostic Mode
Lets try to calculate the percentage of Energy is left at 2020.36.11:
67.3kWh*0.96=
64.608kWh =>> Nom. Full Pack Energy * actual max %soc equals actual Nom. Pack Energy at 2020.36.11
64.608kWh/0.731kWh=
88.38% =>> At 2020.36.11 the actual Nom. Pack Energy in %soc in relation to 100%soc at 2019.12.1.1
This results in even more devastating charge rates:
73.1kWh*0.75=
54.825kWh =>> Nominal Pack Energy at 75%soc w/ 2019.12.1.1
54.825kWh/0.64608kWh=
84.86% =>>
Same Pack Energy needs ~85%soc w/ 2020.36.11!!
Comparing charge speed after adding the same amount of Pack Energy:
2020.36.11 vs. 2019.12.1.1
85%soc equals 75%soc =>> Pack Energy level: 54.852kWh acc. onboard Diagnostic Mode.
28kW vs. 48kW =>> Charge rate when having same Pack Energy Level
Just my thoughts I wanted to share, not including the non-linear part of the %soc when not-usable Pack Energy is factored into range in high %soc.
(*)Some backstory: The SeC couldn't repair it remotely "due to a 3rd party emmc and thus no guarantee to be able to help" - after this warning they were very helpful and even said kind of apologetic that they "have to charge me 6 minutes working time" - it was the smallest amount possible. Very nice, it was worth driving 220km instead of the 60ish to my nearest SeC who started lying to me some time ago, but this is another story for a separate thread.