DC charging issue/failures

[tigerbalm]

I haven't been driving my Taycan too much recently – and using AC charging from home almost exclusively. Which I think has been hiding a DC charging problem I might have for the past few months.. I’ve tried three DC charging sessions over the past six weeks:

Session 1 (mid November): 150kW/400V Delta charger (ESB network). Started at 50% SoC and it received energy at 150 kWh adding about 6% when the session failed.
Session 2 (earlier this week): 200kW/800V Delta charger (ESB network). Started at 12% SoC and it received energy at 200 kW adding about 8% when the session failed.
Session 3 (today) : 350kW/800V ABB charger (IONITY network). Started at 12% SoC and it received energy at 247 kW adding about 8% when the session failed.

When a session failed the following happened each time:

1. No amount of attempts (or moving to another charger at the station) will allow a DC session to start again. You will always get a red light after auth.
2. No amount of attempts at AC charging will start – including driving 30 mins back home to our reliable home AC charger after failed session 3 today.
3. Locking the car for a few hours (or overnight) will reset things so that AC charging will start and be successful to charge car to 100%.
4. Locking the car for a few hours (or overnight) will reset things so that DC charging can be re-attempted – but it will only accept 6% to 8% SoC before failing and starting the whole process all over again.
5. When the session fails – a “Yellow electrical – inspection necessary” message is shown and the car does need to be switched off and on – before you can put it back into drive or reverse to move it.

Right now I got the car home after session 3 failure and am in the "walk away and see if it resets" period.

Anybody ever seen this pattern?

Sponsored

 

[Scandinavian]

Never seen anything like it. I have had some charging sessions fail recently after driving in a snow storm. The car was completely covered by compact snow on the front. But 200 kW charger worked fine. 350 kW gave errors about insulation issues.

Did you get any fault message on the charger?

 

[tigerbalm]

Did you get any fault message on the charger?

Just some variation of "charging session has ended" – as if I had ended the session normally from the car.

 

[Donlam]

I normally hold the dc charging cable connector for 20 seconds after start charging. Don't have this issue so far. I found Chademo (heavy) has rock solid connect charging than the CCS.

 

[WasserGKuehlt]

@tigerbalm this sounds suspiciously like a bad (battery) module . I assume you’ve taken a reading of the battery state? If you can spot an abnormal deviation in voltage, you’d have a stronger case to make with your local Porsche service.

I have had abnormal terminations - but immediately after authentication, and at the same charger (which was evidently broken, but didn’t yet know it). This doesn’t seem to be the case for you, hence it’s very likely a car-side “unrealized” fault.

 

[RBGtaycan]

I haven't been driving my Taycan too much recently – and using AC charging from home almost exclusively. Which I think has been hiding a DC charging problem I might have for the past few months.. I’ve tried three DC charging sessions over the past six weeks:

Session 1 (mid November): 150kW/400V Delta charger (ESB network). Started at 50% SoC and it received energy at 150 kWh adding about 6% when the session failed.
Session 2 (earlier this week): 200kW/800V Delta charger (ESB network). Started at 12% SoC and it received energy at 200 kW adding about 8% when the session failed.
Session 3 (today) : 350kW/800V ABB charger (IONITY network). Started at 12% SoC and it received energy at 247 kW adding about 8% when the session failed.

When a session failed the following happened each time:

1. No amount of attempts (or moving to another charger at the station) will allow a DC session to start again. You will always get a red light after auth.
2. No amount of attempts at AC charging will start – including driving 30 mins back home to our reliable home AC charger after failed session 3 today.
3. Locking the car for a few hours (or overnight) will reset things so that AC charging will start and be successful to charge car to 100%.
4. Locking the car for a few hours (or overnight) will reset things so that DC charging can be re-attempted – but it will only accept 6% to 8% SoC before failing and starting the whole process all over again.
5. When the session fails – a “Yellow electrical – inspection necessary” message is shown and the car does need to be switched off and on – before you can put it back into drive or reverse to move it.

Right now I got the car home after session 3 failure and am in the "walk away and see if it resets" period.

Anybody ever seen this pattern?

Dealer ought to have DC charger...try it there (and leave it if the session fails!).

 

[tigerbalm]

Dealer ought to have DC charger...try it there (and leave it if the session fails!).

Yep, that's the plan. It does appear to be very repeatable.

 

[tigerbalm]

Just documenting an example of this for posterity. I went back to IONITY this evening to document it better before sharing with Porsche Service next week. So this is DC charging attempt failure #4.

Arrive at IONITY with 13% SoC:



Plug in and charger starts as normal – both using Porsche Charging Service RFID card and Plug & Charge:



Delivering 172 kW – not the fastest but still okay:

It continues fine for a few mins:

When it hit 31% SoC – one of the longest DC charges recently before it fails – I get the yellow warning message:

The charging screen shows red:

With the charger outside matching:



And showing an error:



And of course the red ring around the plug release button on the car itself:

The car now will also show a yellow battery "battery" icon on the dashboard and will only go between Neutral and Park – not into Drive or Reverse:

Turning off and on the car fixes this immediately:



I cross over to the IONITY station on the other side of the motorway – but nothing will get it started unless the car has been locked for a few hours.





I return back home and try and charge with my home AC charger but it too fails to start.

 

[whitex]

I haven't been driving my Taycan too much recently – and using AC charging from home almost exclusively. Which I think has been hiding a DC charging problem I might have for the past few months.. I’ve tried three DC charging sessions over the past six weeks:

Session 1 (mid November): 150kW/400V Delta charger (ESB network). Started at 50% SoC and it received energy at 150 kWh adding about 6% when the session failed.
Session 2 (earlier this week): 200kW/800V Delta charger (ESB network). Started at 12% SoC and it received energy at 200 kW adding about 8% when the session failed.
Session 3 (today) : 350kW/800V ABB charger (IONITY network). Started at 12% SoC and it received energy at 247 kW adding about 8% when the session failed.

When a session failed the following happened each time:

1. No amount of attempts (or moving to another charger at the station) will allow a DC session to start again. You will always get a red light after auth.
2. No amount of attempts at AC charging will start – including driving 30 mins back home to our reliable home AC charger after failed session 3 today.
3. Locking the car for a few hours (or overnight) will reset things so that AC charging will start and be successful to charge car to 100%.
4. Locking the car for a few hours (or overnight) will reset things so that DC charging can be re-attempted – but it will only accept 6% to 8% SoC before failing and starting the whole process all over again.
5. When the session fails – a “Yellow electrical – inspection necessary” message is shown and the car does need to be switched off and on – before you can put it back into drive or reverse to move it.

Right now I got the car home after session 3 failure and am in the "walk away and see if it resets" period.

Anybody ever seen this pattern?

Have you done the battery leak test recall yet?

 

[tigerbalm]

Have you done the battery leak test recall yet?

Nope, I'm not sure if that is even a thing here in Ireland yet.

 

[whitex]

Nope, I'm not sure if that is even a thing here in Ireland yet.

Also, have you noted battery temperatures from start to fail?

 

[tigerbalm]

Also, have you noted battery temperatures from start to fail?

31C at start of recent failure session – failed when temp was 39C.

 

[Tooney]

Just documenting an example of this for posterity. I went back to IONITY this evening to document it better before sharing with Porsche Service next week. So this is DC charging attempt failure #4.

I return back home and try and charge with my home AC charger but it too fails to start.

Excellent documentation. With that and recurring incidents, should get accurate diagnosis by dealer.

Since AC charging also does not work, my guess is on-board charger has gone bad.

My car had situation where AC charging was occurring at rate of only a couple kw. On-board charger was replaced.
Good luck.

 

[Scandinavian]

Just documenting an example of this for posterity. I went back to IONITY this evening to document it better before sharing with Porsche Service next week. So this is DC charging attempt failure #4.

Arrive at IONITY with 13%


I return back home and try and charge with my home AC charger but it too fails to start.

Sorry to hear about your troubles now, I remeber that you plan a trip to Norway in February. So hopefully the dealer can sort this out with the documentation you can provide.

Once the car has rested a few hours, you can charge it again with AC? That sounds like something in the BMS and /or Hv Battery control unit is failing/overheating?

Keep us posted once the dealer has analysed the fault.

 

[tigerbalm]

Sorry to hear about your troubles now, I remeber that you plan a trip to Norway in February. So hopefully the dealer can sort this out with the documentation you can provide.

Good memory Peter! Yeah, six weeks away – so fingers crossed we don't have to cancel. This Turbo S has been flawless until this.

Once the car has rested a few hours, you can charge it again with AC?

Yep, which is why it took me so long to realise that I had an issue. Because I am getting excellent distance out of the battery and zero issues fully charging it with AC (so long as I haven't tried DC beforehand) – I agree its more likely to be on the BMS or charging infrastructure than the physical battery cells themselves.

It will be interesting to find out what it is!

Sponsored