Frequent 50KW DC charging and the Model3

[ittah]

Perhaps this is so that you don’t always charge to exactly the same point. Sometimes 87%, 92% etc to avoid a memory effect?

Can always be set manually using the Control feature in Teslafi (if subscribed).

 

[Uncle Paul]

Little concerns about fast charging overheating a Tesla Battery. They have large heat exchangers and powerful fans that will control the tenps of the water coolded battery pack. If the pack gets too hot, the computer will simply turn down the rate of charge.

"A plugged in Tesla is a Happy Tesla"

 

[tsh2]

A recent paper on extreme fast charging https://www.cell.com/joule/fulltext/S2542-4351(19)30481-7#back-bib29
What I hadn't appreciated was that slow or cool charging of Li-ion chemistry cells is damaging just as excessive temperature is.

It sounds like: charge when warm, as fast as you can (but not too close to the peak cell voltage).

 

[tsh2]

Actually, reading a bit deeper, it may only be fast charge rates which are harmful at low temperatures

at 20% capacity loss ... 2,500 equivalent full cycles (EFCs) at 1 C charge to only 200 EFCs at 4 C charge.

Seems this capacity loss relates to the charge current overwhelming the rate of 'desired' charging interactions, so I'm sticking with my assumption that cool gentle charging remains the best.

 

[WannabeOwner]

it may only be fast charge rates which are harmful at low temperatures

Bjorn has Supercharger video of cold charging. Car doesn't charge at all (or not much) for ages, whilst the battery heater and/or stators are put to work.

Moral is, assuming choice available, to Supercharge night-before rather than morning-after in cold weather.

 

[freekie]

Here is a pic of my local charging bays at 16:45. Really no contention. I mostly charge at Park
and Rides around Edinburgh (which seem to be setup for people to leave their cars on AC charge for the day).

Is all public charging in Scotland free?

 

[Roy W.]

Is all public charging in Scotland free?

All the Charge Place Scotland chargers are free to use, apart from in Dumfries & Galloway. Most small towns have a 50kW charger.

You can use the app with these, but I suggest you get the Charge Your Car RFID card, costing £20 a year, as mobile coverage can be very patchy.

 

[Rob R]

All the Charge Place Scotland chargers are free to use, apart from in Dumfries & Galloway. Most small towns have a 50kW charger.

You can use the app with these, but I suggest you get the Charge Your Car RFID card, costing £20 a year, as mobile coverage can be very patchy.

Dundee City has been charging since 1 November 2019. For non-residents, it is a reasonable 15p/kWh, plus 38p connection fee, not sure if its a different price for residents but they do get free parking in multi-storey car parks (which will all have whole floors of AC charging, Greenmarket is open, Olympia under construction). Advise checking website or email or call [email protected] , 01382 432779 or 01382 432713.

The rapid hubs (Lochee, Princes Street and Queen Street, Broughty Ferry) are free to park while charging, suggest AC charging at Queen Street, you get 3 hours free, rapids are just 30 mins.

 

[ittah]

Talking about cold pack temps, noticed by selecting a Tesla Supercharger in NAV (within 30mins drive) the pack will commence preconditioning (message on dash) and then charge at Non Tesla 50KW location, haven't tested whether the pack makes less noise once preconditioned.

 

[Rooster6655]

Talking about cold pack temps, noticed by selecting a Tesla Supercharger in NAV (within 30mins drive) the pack will commence preconditioning (message on dash) and then charge at Non Tesla 50KW location, haven't tested whether the pack makes less noise once preconditioned.

I'm not sure if the preconditioning would have much effect on a 50kw charge and more designed for the higher charging of superchargers