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ironhydroxide

@ironhydroxide@sh.itjust.works

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ironhydroxide ,

And car chargers?!? Hell level 2 chargers are glorified extension cords. Why should they get an exception?

ironhydroxide ,

You could claim safety concerns in anything and everything.
Doesn't mean that the manufacturer should have the right to intentionally make things that cannot be repaired due to drm.

In those counties that you cannot change a light switch on your own, do you have to call up the manufacturer of your home(and no other) and pay them to fix your light switch, and then have them say it's better to just buy a whole new house, this one is not worth fixing.

ironhydroxide ,

Yes, exactly. State. Not the company that will profit more from you buying another house because their house is the only one allowed to have the cabinets and organization that you like. And have been using all your life.

ironhydroxide ,

Sounds like a market niche, you could start it up, call it something like "macrosoft". .. then start making scripts that do the work for the user, don't release the scripts because people pay for them. Let this go on for many years and you find yourself shoving "AI" down your users throats and screenshotting their desktop without explicit permission......

ironhydroxide ,

I have a few. Some try and call home (mostly the doorbell, every 10s).
The others are easy to setup and run with frigate.

ironhydroxide ,

The doorbell does, except for no sub stream.
And the only way for mine to be setup is their bs app.

I should've looked better when buying, but alas. I have this one and I'm lazy.

ironhydroxide ,

Yes, the issue I have with no sub stream (only on the doorbell) is that it uses more processing for detection on such a large resolution.

ironhydroxide ,

Just make sure they have substreams and get a coral (or GPU) for detection. Then a pi could probably handle it.

I have enough processing to do it all on CPU (8 cams+doorbell) but it ramps up the power usage, so it was better to use the gpu I already had for transcoding, as detection.

Without you can still just record and overwrite. Not that it's extremely useful without detection and notifications.

ironhydroxide ,

Handle is much different than efficiently calculate.

ironhydroxide ,

Sweet Alabama home doesn't sound right, so it's gotta be sweet
CAROLINE ^dah dah dah

ironhydroxide ,

Yes because overpasses are not a thing, nor are buildings taller than trucks, with windows.

ironhydroxide ,

Just because few currently do it, doesn't mean that more companies won't start.

Ads are a disease and spread to fill the space available.

ironhydroxide ,

Making it out to be something it's not?
I pointed out that there are other ways than helicopters to see the tops of trucks. You dogpiled the "nobody does that".

Who made it something it wasn't?

Also it is something done

ironhydroxide ,

No worries, take care of yourself, it's Friday after all.

And if you need to vent, feel free to DM me, I've got thick skin and am willing to listen.

ironhydroxide ,

What is that thing?

ironhydroxide ,

It's always been a Wendy's. Can I get my frosty now?

ironhydroxide ,

That's...... not how battery packs work

ironhydroxide ,

No.
The packs aren't like flash storage where they have spare blocks to use when one block wears out. Essentially switching in something that wasn't used at all before.

The cells are all connected physically, being charged and drained. They do not connect and disconnect cells when wear occurs.
They have software limitations on how far to charge and discharge (at what voltage and c rating).
Yes, a larger pack will last longer if the charge/discharge cycles aren't as "deep". But no, they don't have spare cells just to cover wear.

ironhydroxide ,

No. Handwaving a microcontroller doesn't fix it unless you have two high current contactors per cell, and multiple intermediate busses and contactors, it's not going to work.

That's going to add a ton in transmission complexity, and weight, that doesn't really benefit the battery at all.
Along with the fact that cells should be balanced in wear and cycles. It just doesn't make sense.

ironhydroxide ,

Most packs have only 2 contactors. Not 2 per cell.
The only way to have spare cells that are not in active use all the time is to physically disconnect the cells from the rest of the pack.
The only way to do that is to have contactors at each "end" of the cell, or cell pack, that you want to switch in and out.

Car packs are ~360-800v nominal depending on the car/pack.
To get to those voltages with the normal cells (~3.2-3.7v nominal)you need between 95 and 250 cells in series (wired one to another directly, all the power goes through all the cells).

Let's do an example. The simplest pack possible. A 95s1p meaning 95 cells wired negative to positive in a single line. A contactor at each end to cut power to the car for safety.

This is the simplest pack. Also the lowest range and worst for cell wear.

So say you want to "double" the range?
You "simply" build an entire separate pack, and drop it next to the first with it's own set of contactors, right?

But in that case you have doubled the amount of interconnect bus in the pack(the wires to get the high current out of the battery), as well as contactors.

You could get to the same power storage (range and longevity) by making a 95s2p pack with one set of contactors.

So instead of 2 lines of cells, you connect each cell to it's partner with a small piece of wire then connect that to the next cell in the pack.

This means you don't need the extra long wire from the back to the front of the pack for the second set. The tradeoff is you can't physically disconnect the second cells, but you don't need the weight and complexity of extra contactors, and the long wire for second cell set.

So what's the actual benefit of physically disconnecting the second set of cells?

When one battery dies in the 95s1p pack, the whole pack is useless, as all the power from the remaining 94 cells must travel through the one high resistance cell.

In a 95s2p pack each cell only has to take half the current of the entire pack (improving as you go up in parallel cell count).

You would be able to run one 95s1p dead, then switch to the other and keep driving till that is dead. But the efficiency of that is actually less than you get if you just had one 95s2p you ran from full till dead.

So again, being able to physically disconnect some cells in the pack only adds weight, complexity, and risk.

The Tesla car with "less range" that can be "unlocked" is literally just a software setting that limits the charge/discharge voltage of the entire pack, not switching in and out battery cells physically.

So... As you said

It's okay to be wrong.

ironhydroxide , (edited )

Not sure where you're getting "one total massive cell" from anything I wrote.

Every pack is made of a bunch of smaller batteries. You can't get 400v without batteries in series, from batteries that only make ~3v.

Just saw your last paragraph edit.
It's a car pack, every ounce matters, and doubly so when it only adds complexity, reduces efficiency, and reduces reliability.

And an estimate of weight of the extra interconnect.... let's say it's 8' from back to front of the pack, a 350v pack and a 250kw motor. This means minimum of 715 A.
Busbar that is rated for 700-800A @30c rise has cross section of 1/4"x2". For the 8' length that means we have 48in^3 of copper. That is ~16lbs of copper alone. Not counting the contactors, insulation, etc.

ironhydroxide ,

It is, especially when the choice that leads to that extra weight is less reliable, less efficient, and more costly. All things you don't particularly want in a car

So let's get back to the real discussion on how the packs actually work.
Can you explain how a microcontroller is supposed to put cells in and out of the circuit?

ironhydroxide ,

Plate.

Just salad wraps, bowls, and more.
The more could be plates, or any other random vessel in or on which to place a salad.

All the ways streaming services are aggravating their subscribers this week (arstechnica.com)

Below is a look at the most exasperating news from streaming services from this week. The scale of this article demonstrates how fast and frequently disappointing streaming news arises. Coincidentally, as we wrote this article, another price hike was announced....

ironhydroxide ,

No, they know why, what they're trying to figure out is how to easier detect and punish those who pirate for "stealing" their hard purchased profits.

ironhydroxide ,

There are screw together butt connectors, in my experience have a more solid connection than the crimp style as far as pullout is concerned. https://www.posi-products.com/index.html

ironhydroxide ,

Putting it into the metaphor makes it so much worse.

Here, subscribe for a chance to claim a hug in the event you might need a hug, but if you need a special hug you are more than likely not going to get it, and if you have ever needed a hug in the past then you can't get the subscription.

ironhydroxide ,

One is holding her waist, one is pulling on her right leg.
That cuff is her shorts.

ironhydroxide ,

Do you drive a car? How about ride the bus?
Use electricity?

Spineless twerp!!

Yeah, just because he admits to not being your idea of perfect, eating cheese and fish, doesn't mean he isn't trying. I see that comment about eating cheese and fish to mean he's not eating steak every night, like others.

ironhydroxide ,

It's less a case of gaming Amazon, as it's a case of amazons systems making it easier to game the trademark office, than gaming Amazon.

ironhydroxide ,

Though I agree that would be ideal, it also takes more work than just saying "see those guys want to make your life worse, we might not do that openly, vote for us because there's no other choice"

Humans are lazy, and power hungry. Even Democrats.

ironhydroxide ,

so he needs to actually listen to the people who will vote for him and give them what they want

Why? It's more work. And who are you gonna vote for anyways? Someone else that will end up with Drumpf again?

Like I said, humans are lazy and power hungry.

ironhydroxide ,

I would say most of them are working harder than the people above them.

ironhydroxide ,

Let them ..... well yes eventually you will have to let them, as you can't stop them.

Forcing them along that path though, yeah that's not cool.

ironhydroxide ,

Is this how animal farm started? It's been too long since I read it.

ironhydroxide ,

Just swap the leads back and forth very fast

ironhydroxide ,

This is what happens when you can DRM every piece of the car.
Tesla is being taken as a model, and it's extremely anti consumer

ironhydroxide ,

When compared with the cost savings, in my personal case, renting when I need a car to drive 100+miles, is cheaper than buying a more expensive ev, or paying for fuel in a gasoline vehicle.

The time is negligible as well when I compare the time I don't spend at gas stations because I charge at home.

ironhydroxide ,

Welp, time to disable OnStar.....

ironhydroxide ,

I agree it should be codified, but have no hope that our fascist leaning lawmakers won't gladly accept $$ from insurance companies and automakers to do what they want to do anyways.

ironhydroxide ,

Yes nacorn to crack!!

ironhydroxide ,

It's not remarkable they keep flying. They're in space, just moving along their vector.

It is remarkable they keep operating though.

ironhydroxide ,

*capitalism

ironhydroxide ,

I'm pretty sure if a mouse wanted to sleep in your reproductive part, you would have something to say about it.

ironhydroxide ,

Not to mention the high likelyhood of it pulling a Salton sea remake in the next couple decades.

ironhydroxide ,

Read the first paragraphs of the article (till the paywall), still have no clue what a "turk" is.

Maybe I'm just dense.

ironhydroxide ,

Yup Amazon is getting worse, like everything else.

I've noticed recently that delivery estimates have been getting less accurate as well.

Before,2 day shipping meant 2 day shipping. Now? Not so much.

Of the last 6 Amazon orders I've placed 4 of them either changed arrival dates after purchasing, or were "delayed" in shipping

ironhydroxide ,

When they say "arrives on the 22nd" I expect it to arrive on the 22nd. I don't care if it's same day or a week later.

I need to start just ordering directly from manufacturers.

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