Got a Tesla - in Toyota clothing

If that bothers you, best not to calculate what your Volt battery is doing in daily driving

 

?? I'm talking about possible battery health/life if you use the Tesla Supercharger system. Some could use it exclusively. And never pay a dime!!
You gotta love that part..

A Volt charges at a lowly 0.2C charge rate on L2 charging; 3.3 kw for the 16.5 kw battery, which equals ~4 hrs if you use the entire charge.
Or on L1 it's 0.072 C = ~ 7-8 hrs. You can't hit a Volt battery hard when charging it. It has an advanced TMS system, so battery temp is not an issue.
I'm sure the RAV4 EV inherited a proper TMS from Tesla. Is this correct?

 

I said driving

 

No, it wouldn't charge at that rate.
The Superchargers max out around 1.5 C when the pack is near empty. As the battery fills, it is tapers off to treat the batteries as kindly as possible.

 

Oh, full throttle is 6.12 C, that's not too much, is it? Seems gentle enough.
Full throttle will yank you to a top speed of 100 MPH in ???, not too long.
What else can you do to abuse the battery?
Pikes Peak up, then down? Been there, done that. It probably was the hardest thing my poor little battery ever experienced. It got a ~75% charge coming down in ~45 mins. But with proper TMS no battery temp issues, right? I flogged it as much as I could on the way up,, but traffic, you know.

(I'll correct that C rate above, sorry.)

 

Not if you are worried about 2 - 2.5c in a Tesla.

Think of city driving, with repeat accelerations and decelerations at say 30 - 80 kW.
The Tesla battery feels sorry for the Volt battery

 

How is that broken down?

How long is the longest line you have seen and the typical wait time of that line up?

 

I can't speek for Bill, however personally I have charged about 40 times at Superchargers. I have had to wait zero times.
I have read of some people that have had to wait. I just have never experienced it myself.

 

The use of a laptop battery cell led to a brilliant engineering byproduct of that selection - each individual cell is sealed. And because each cell is sealed they can surround each cell with coolant. So while being cheaper, because their supplier can crank out enormous numbers of these cells regardless of whether the end point is a computer or a car, Tesla can take advantage of scale and Tesla's TMS design also is more efficient.

 

In the beginning, with the Tesla Roadster, it was more opportunistic, than 'brilliant'. There were not large Li-ion cells back then that could have a coolant based TMS incorporated easily.
Nowadays, some say carrying around +7000 stainless steel cans is a silly way to build a battery pack.

But Tesla does have a proper TMS. Only time will tell how well all the Li-ion based EV/PHEV's will do concerning battery life.

 

See.
That is the hard part. Figuring out which statements are being made in reference to current scenarios and which statements are based more on forward thinking scenarios.

 

More efficient in what way ?

 

Hot air blown onto a well compacted solid brick shaped pack

 

Any coolant based TMS that heats or cools a battery pack is for battery pack life and available performance. That's its main job. (Tesla, Volt)
This is better than a fan that blows cabin air thru the the pack to only cool it. There is no control of the cabin air temp.(PiP)
The fan is better than no TMS. (Leaf)

As for efficiency; if the the question is which uses less electrical power to keep the battery happy, in that case it would be the reverse order above.

 

Have you seen those videos that John did where he shows what his battery temps are? So what temps would you prefer? What does the system keep the temps at? Hopefully you would know those answers before spouting off, right?

 

Why are you asking for reason, when the point is Volt religion ? To wit:

The Volt is 'Tesla-like'.
The PiP and LEAF are the deceivers

 

This is just a technical discussion, correct? Not an opinion piece.

Sorry to 'rile' (the sensitive) again by pointing out that the Volt and the Tesla have a coolant based TMS that warms or cools the pack as needed.
It's well known that the Leaf can have 'Issues' with its pack in hot climates.
It's reported that the PiP will pop the "Battery Not Available" msg in hot climates and/or high usage. That is a TMS function,, of sorts, correct?

There are different levels of this technology out on the market, correct?

For a very similar price you don't have to live with <62<13. You don't have visit gas stations routinely, ymmv. This is an opinion sentence!

 

. . . . and . . . it is reported there have been Volt fires . . . . Tesla fires . . . - what's the point . . . "thermal management"?? That IS a TMS function, right? what .... you mean Rome wasn't built in a day ?? oh wait .... that's right .... hundreds die yearly in car/gas fires & more are seriously burned. 100 year old tech - and they
haven't got the kinks ironed out with that bad boy issue yet. News flash: Nothin's perfect - some here already know that ....
.

 

So in other words you have no idea what the Volt battery temp ranges are, correct?

 

No, that would be incorrect, as would be your implication of Volt fires outside of tests.

No TMS system is designed to control the battery temps after being impaled by spikes of metal, or being torn apart.
In the Volts case, the fire was actually caused by the coolant fluid after the car was simulated to roll, was stored incorrectly, the had leaking coolant freeze, then thaw, over a period of three weeks.

As for you logical fallacy of exaggeration, nobody ever claimed the TMS in the Volt or Tesla was perfect.
The discussion is about the comparative quality. A system with TMS is better than one without. Just that.
Nothing made is "perfect" and I have seen no posts claiming that the current TMS of any car is.