Yes, something happens to old cells. I recently charged my 2011 Leaf at
L3 (haven't done so for several years). According to the charger
display, it started at 25kW. After a few minutes it dropped down to
10kW. Still better than L2... I'm happy to be an early adopter, but I
hope the new Leafs have better chemistry.
Peri
------ Original Message ------
From: "Cor van de Water via EV" <[email protected]>
To: "Electric Vehicle Discussion List" <[email protected]>
Cc: "Cor van de Water" <[email protected]>
Sent: 02-Oct-19 6:41:02 PM
Subject: Re: [EVDL] EVangel-about: San_Antonio-TX Tesla Supercharger
site ...(Watt-me-worry)
As batteries age, their internal resistance goes up. With higher internal
resistance, the upper voltage limit of the cell (typically between 4.1 and
4.2V) is reached at ever lower current, hence the reduced charging power.
My 2013 Leaf is now so degraded that even at 50% SoC it can no longer take the
“full” 50kW from the CHAdeMO DCFC and I typically charge only from L2.
At very low SoC it will still pull full power, but very soon starts cutting
back in current, because one of the cells is hitting the high voltage cutoff…
(And the cells are still reasonably balanced)
Cor.
Sent from Mail for Windows 10
From: Willie via EV
Sent: Wednesday, October 2, 2019 5:42 PM
To: [email protected]
Cc: Willie
Subject: Re: [EVDL] EVangel-about: San_Antonio-TX Tesla Supercharger site
...(Watt-me-worry)
On 10/2/19 4:49 PM, brucedp5 via EV wrote:
Yesterday, I queued to get done lots of chores, as one of
my twice weekly outings my VA hospital Dr. (she sez) 'You
need to get regular exercise'. The frequency of those
outings are to increase as now that September's NDEW
EVents are completed, I've re-contacted my realtor to
re-hook up with him and get back to my whole reason for
moving from Silicon_Valley-CA to become a Texan:
to buy a home so-as to live-out my last 10 good-years in
(a ~$200k 3+bed,2bath home here, would be ~2+M back there).
After I completed my tasks and before I headed back to my
rented room (I was feeling the exercise burn and old-man
arthritic pain only sleep would reduce), I swung by San
Antonio's (sa) newest public EVSE addition: a new Tesla
SuperEVSE site
https://www.plugshare.com/location/204964https://www.plugshare.com/location/204964
This puts sa on the superEVSE map as an in-route charging
destination, which also means we will see a whole lot more
Tesla EVs in this area :-)
The plugshare listing touts 10 stations, but 2 stations
are still wrapped in plastic, thus are not available/not-
powered on (perhaps this is for future growth?).
I found it interesting that it is located within a couple
blocks of my realtor's office. Some Tesla forum posts
questioned Tesla's site location choice. But, I feel it is
a worthy selection. There is ample food (restaurants),
drink (starbucks), shopping (plenty to do while the EV is
super-soaking-up high powered L3 juice).
The site is just off the I-10 Hwy & the neighborhood is
upscale (affluent, yuppie). So, I would feel safe anytime
during its 24hr access (though streets tend to roll-up
their sidewalks after hours in TX).
Unlike the Walmart e.america site I posted about
http://electric-vehicle-discussion-list.413529.n4.nabble.com/NDEW-updates-9-14-Austin-9-21-San-Antonio-vw-s-E-America-L3-EVSE-Walmart-tp4695078.html
which is Not as easily found just off I-35 Hwy, where you
have to zig &zag (counting the drinking/sleeping homeless
along side) the rough roads/streets. It too also has 24hr
access, but that area is definitely not a safe location
after hours.
This Tesla superEVSE is easy to spot as most of the stations
are in line with the street, see
https://s3.amazonaws.com/plugshare.production.photos/photos/485546.jpg
& the rest are on a back row with the utility power cabinets
https://s3.amazonaws.com/plugshare.production.photos/photos/485547.jpg
(note: the huge boulders placed in front of the power cabinets.
Rocks, boulders, stone work are all valued on this n.west sa
side of I-10 Hwy. Stone colors, light tan to reddish brown are
worn or used everywhere. Those boulders cost the shopping center
the superEVSE is located in, a large chunk of moola. They also
protect againt inebriated 4x4 monster ice attacks from hi-speed
bashing those cabinets).
In the 1st image link, I cane walked over to yak at the (red
on the left) Tesla-3 EV driver sitting while charging. He was
kind enough to share with me, that he was from San_Diego-CA and
was eco-touring, driving to FL using I-8 &I-10 Hwys.
In my trip to relocate to TX, I found parts of I-10 were
quite (teeth-chatteringly) rough on the suspension. So, I
slowed to 60mph in the right lane (on a Hwy with 70 &80+ mph
speed limits). It got better when I got near TX, but you need
to bring/have on you proof you are a citizen.us as there is
a check-point at El_Paso-TX.
The Tesla-3 driver said he was down to 35mi range (and
getting concerned) when he pulled &plugged in. He said his
infotainment screen was showing he was pulling 144kW into his
EV pack. Since is SOC was low, he would be drawing near
maximum charging current.
This tells me this was not your (old-school) 120KW superEVSE,
but a newer V2 touting 150kW capability (others please verify,
correct):
https://www.google.com/search?q=supercharger+v2
I could be wrong but.... I don't believe there is any hardware
difference between 150kw SuperChargers and 120kw. I believe all 120kw
were software upgraded at the same time to do up to 150kw for certain
cars under certain conditions. I don't believe that there are any old
90kw SuperChargers out there; I believe all have been hardware upgraded
to 120/150kw.
I believe only Model 3s can reach near 150kw, not Ss or Xs. Or maybe
not all Ss and Xs; I would guess that Raven (new S) will do 150. As
they age, the upper limit seems to get cut back; my old S (126k miles)
has done no more than 86kw for over a year.
A few months ago, I was within a few hundred miles of Las Vegas which
hosts, I think, the only not California 250kw SuperCharger. I was
sorely tempted to divert just to experience the 250. That is, with my
newer Model 3. The 3 uses far less charging time than you might expect.
A lot due to better efficiency than Ss and Xs and some due to faster
charging batteries. Ss would typically start at about 400 mph (about
110-115kw) and quickly drop off. 3s go to 500+ mph and do not drop off
as rapidly.
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