Tesla is fast

I read that perfectly well and understand what is happening and it is constant with my writing. You did not read or understand my text.

It is not the battery that is changing the measured Ah (Coulombs) out of the battery it is the test conditions that limit it.

At low temperatures the test is terminated before the battery is discharged because the terminal voltage reaches the 2.5V limit. If the test could be continued for longer more capacity would be obtained.

However that is not possible because the voltage gets to such a low level that other secondary reactions occur that compromise the cell. In some cases these secondary reactions can even cause permanent damage.

If a lower current is used so the voltage drop in the internal resistance does not cause premature termination more capacity would be measured.

The main problem is caused by the low diffusion speed of the lithium ions at low temperatures.

Of course because of the lower terminal voltage there is less power and energy that can be extracted from the battery so the energy efficiency at low temperatures is low.

kw

There are no electronic protection devices directly in the series path of electric vehicle batteries.

The temperature is definitely taken into account in the control algorithms but if there is a fault, such as a cable short at the output of the battery the electronics can't help apart from disengaging the main contactor.

In Tesla vehicles there is also a pyrotechnic fuse to isolate the battery if the current gets to dangerous levels. In the higher performing versions that is set to 1500 Amps.

In addition to the battery level fusing there are individual fuses on each cell. One reason for that is that since there a 30 odd cells in parallel in each module there could be a big problem if one cell had a short. With the individual fuse that cell will isolate itself and the battery can still function, albeit with slightly reduced capacity. In the case of the Model S and Model X batteries the cell fuses are short pieces of wire that are used to connect to each cell.

kw

What if your "home" is an apartment, dude?

That would be NONE!

Oh, now it is 200 miles. I providede a reference that indicated the average distance is 150 miles (223 miles max). You have provided, as usual, NOTHING.

I haven't made any - but you HAVE!

Tesla batteries do this all the time.

If you are using stored energy to warm the battery, as you just stated, this reduces range.

Again, it is NOT a closed system - the car is exposed to an external climate that is pumping heat into and out of the battery.

They were notable for being particularly good for driving on cobbled streets. And the idiosyncratic can't take the key out of the ignition until the vehicle is put into reverse gear with the parking brake on.

You provided nothing to prove your claims. As I have said, that report talked about the chargers he stopped at, not the many chargers he passed. Do you understand that? So it says NOTHING about how close the chargers are together.

I've now explained this to you twice. Can you acknowledge what I've explained to you?

But the point I was making is that heating and cooling the battery without discharging it during the process doesn't make any difference to the energy available from the battery at any given temperature.

The fact that Tesla batteries can use their own stored energy to warm themselves happens to be irrelevant to the point I was making.

If that is what you are doing, this does use up some of the stored energy, but it wasn't what I was talking about.

The point I was making is that Gibbs Free Energy isn't a concept that is in any way restricted to a closed system.That you can imagine that it might be does illustrate the point that you don't know what you are talking about and are much too far gone ever to realise it.

How can trmp be appropriate whether you hate him or not?

Stop embarrassing yourself by admitting you're a left wing thief. Robin Hood was not a good guy.

No tax is good. You spend your money on what you want to spend it on, not what others want.

I do not concern myself with your lies.

Likewise, you're not coming close to a human. An American maybe.

Why would you answer such a call? Your phone does display the caller ID right? Your phone allows you to block numbers right?

Yes it is you f****ng fool, SNIPPERMAN.

We can rely on Flyguy for clear and specific rebuttals. We can't really expect him to get the facts right.

And we can rely on SNIPPERMAN for LIES, MISINFORMATION and PENDANTIC RAMBLINGS.

Actually, we can rely of Flyguy to make as ass of himself by claiming the existence of lies and misinformation about subjects that he can't be bothered to identify (and clearly doesn't know anything about).

As soon as you start talking about Gibbs Free Energy you are into pedant territory. We got there because Flyguy posted this bit of nonsense

"Lithium batteries don't perform well in the cold, which trucks have to deal with. At -20 C the capacity is about 75%; at -40 C it is less than half. So those Tesla semis operating during the wintertime could see their range reduced to under 150/250 miles (depending upon the version). Of course, they could insulate the batteries and use a part of their energy to heat themselves (which would also reduce range). "

where he confused the capacity of a lithium ion battery to source current at low temperature (which is reduced) with the amount of energy stored in he battery (which isn't, or at least not much)).

He still doesn't seem to have got the point. The pedantic point is that the energy you can extract from a battery - its Gibbs Free Energy - is slightly (if reversibly) temperature dependent, but nothing like 25% reduction at -20C, or the roughly 50% at -40C that he was claiming.

When you buy an 18650 cell, you can get ones with built in electronic protection. If you charge or discharge too fast, or try to run it too low, it will shut off, but reset itself later. Why are these not used in cars?

Why are they needed? What problem are you trying to solve? Do you think this feature is free? Multiply by the thousands of cells in a car. That is why they aren't used.

The problem frequently in the news where people's houses catch fire due to a fault in a charger/torch/etc. Nickel batteries get very hot, Lithium ones explode in a fireball, setting everything around it alight. Liquid lithium at a few thousand degrees was once fired through someone's hands while typing on a laptop.

The cost only adds 10% to the battery approximately.

Still comes to 10%.

On Wednesday, 11 May 2022 at 13:41:34 UTC-7, Commander Kinsey wrote: ...

With the high current used during acceleration that would cause undesirable voltage drops as well as adding volume, cost and heat to the battery.

kw

On Wednesday, 11 May 2022 at 15:42:36 UTC-7, Commander Kinsey wrote: ...

I seriously doubt there was any liquid lithium ejected from the burning battery. The lithium does not exist separately it is bound in the electrodes and there is less than a gram per 18650 cell.

The electrolyte is highly flammable and liquid or a paste that could cause burns.

kw

kw

I thought you could get those with high current capabilities. Had a very quick look and found 25A unprotected and 15A protected. I'm sure there are others though.

Something hot and liquid came out.

Could have been it, the point is people get burnt and surrounding things catch fire. I've even seen a video of someone falling down some concrete stairs outdoors in an icy winter, with his mobile phone in his back pocket, which erupted. These batteries are a piece of s*it.

My point is you don't get percentages. Changing a $1 item to $1.10 is the same as changing a $10,000 car to $11,000.

Why on earth not?

Until you crash and something shorts inbetween cells.

Looks like the protection they have now isn't sufficient: