Does the J1.2 have a Start Battery Heating feature?

[hifi239]

I just learned that the ID4 has manual start battery preconditioning for charging. J1.2 also? Here’s hoping they will bring that to the OG Taycan.

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[chun]

No such feature.
J1.2 has newer chemistry with a much wider temperature bracket that allows for ideal charging speed, so it’s not that necesarry anymore.
J1.1 could use that feature, sure. But it won’t come

 

[SergeyIndy]

@hifi239, I wonder why you think this feature is useful. I understand several other EVs have it. BMCe system manages the battery temperature behind the scenes. Pre-heating HV battery via a button is pointless use of energy that stresses the battery for no reason. Pre-heating is designed to heat the battery to optimal temperature to accept best charging rate to a point in time when DC charging will occur. Otherwise, there is no benefit of preheating the battery. I have been observing my battery temp and the car thinks that keeping it around 45F-50F is best for it when driving in outside temperatures between 25F-40F. I think well, it might be better for it to be heating above that to get more range, but I am pretty sure BMCe knows better than we do that energy spent will be more than the range benefit from doing so.

Therefore, I think the best thing is to trust the car to do its battery management and then when you really need to pre-heat then set charger as your destination or stop over as designed.

The only thing that I do not trust BMCe to do is manage battery temp with Battery Friendly off. Somehow, it allows the battery to heat to almost max 131F+ with no benefit whatsoever in getting you charged any faster to 85%. Therefore, I always have Battery Friendly On to keep the battery temp in no more than 110F and charging to 85% in the fastest time possible.

 

[hifi239]

Thank you for this. I understand. I was not aware that the car modulated the preconditioning depending on the SoC and charge plan. I thought when it was time for DCFC, it would try to get the battery to 110F the best it can ahead of time.

So anyway, first, I use Waze on CarPlay for navigation because of the live traffic/hazard/routing/police updates. The car will not run its own navigation and so will not auto-precondition when I run Waze. Maybe fixing that is what I’m asking for. My current solution is to disconnect CarPlay and run Waze on my phone only (ugh).

Second, even if I use Porsche nav, me and plugshare know charger reliability in a 300 mile radius better than Porsche - more than half the time a charger the car picks on a route isn’t the one I want for many different reasons. Navigating to my preferred charger requires gaming the logic and I have to spend many minutes fooling around making sure I have the right location and the minimum charge set right. I can’t do that while driving. I’d like an indicator that shows if preconditioning is on or off. I’d like button for a basic preheating for DCFC in 15 minutes to 85% from wherever the SoC is now please.

Third, I’d like to be able to turn off the preconditioning when I arrive at a station and the chargers are full or broken, and I need to move on. I think turning the car off and on does that but I have no way to tell.

 

[SergeyIndy]

@hifi239, these are very good points, so thank you for explaining. Then I agree with you that manual control of preheating would be useful with a target time point. The approach I used so I am not spending time finding chargers along the way, is to add them as Favorites. Then for preheating to occur, I just select the next one on the route from the Favorite list. I understand this does not help if PCM Nav is not running.

 

[Johan Meert]

You can always put the car in sport+, it will then heat battery to optimal condition for performance (and that is the same for charging).

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