Qualcomm's Quick Charge 5 Can Get a Phone To 50 Percent Battery in Five Minutes (cnet.com) 50
Qualcomm is giving its Quick Charge technology a sizeable boost, one that the company claims will be able to plug in and get a device with a 4,500mAh battery from 0 to 50% in five minutes and from empty to 100% in 15 minutes. From a report: The new technology -- which will make its first appearance in devices during the third quarter of 2020 on phones that also utilize the company's Snapdragon 865 and 865 Plus processors -- will also be able to take advantage of more than 100 watts of power to speedily refill depleted device batteries. Most flagship phones have battery capacities ranging from 3,000mAh to 5,000mAh depending on the manufacturer, features and the size of the device. Apple's 5.8-inch iPhone 11 Pro has a roughly 3,000mAh battery while Samsung's 6.9-inch Galaxy S20 Ultra 5G has a 5,000mAh battery. While the feature is starting with devices that have its flagship 800-series processors, the company expects it to trickle to down its more affordable 700 and 600-series chipsets over time. In addition to the faster charging, Qualcomm touts that the new format will be "up to 70% more efficient" than its Quick Charge 4 and also runs 10 degrees Celsius cooler (or 50 degrees Fahrenheit) when recharging with a cable.
Exploding batteries... (Score:2)
Re:Exploding batteries... (Score:5, Informative)
They just looked up 10C = 50F for weather, not realizing (or caring) that the difference between 0 and 10C is a different F number (18, as you said) than "temperature point" of "it's 10C outside", which is ~50F.
So on a thermometer they're "right" but they're very very wrong any other time.
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great feature if you need it... but avoid using it (Score:5, Informative)
I've got a phone from a few years ago that still can run for two days without recharging. How? I use the slowest, lowest power charger to charge it overnight. If I let it get too low, it won't even hit 100% in the morning, but the slow charging helps preserve the life of the battery. These fast charge systems are great, but should not be used as daily charging if you want your phone to last.
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Yeah I've mostly used the standard Samsugn charger or a compatibe PD brick to charge my Note9 and the battery is significantly weaker at less than 2 years in.
It's easy to charge a battery quickly, you just pump a ton of current in. The trick is not destroying the battery, and the way to do that seems to be keeping the charge rate below 1C. They say it'll charge to 50% in five minutes so maybe charging to 100% will take 55 minutes more.
Re: great feature if you need it... but avoid usin (Score:2)
They say it'll charge to 50% in five minutes so maybe charging to 100% will take 55 minutes more.
Maybe you need to go read the first sentence of TFS over again.
Re: great feature if you need it... but avoid usin (Score:5, Funny)
Look you can't expect me to read both the subject and the first sentence. I don't have all day to post here!
Comment removed (Score:4, Insightful)
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Even if it was 90% efficient that would still be 10W of heat. Many laptops can't dissipate that much, e.g. some models of Macbook only have about 10W for the entire CPU (so the thermal output will be a fraction of that) and even then it thermally throttles at 100C within seconds of being loaded.
OnePlus have 30W wireless charging but the special charger has a fan built in to cool the phone.
Comment removed (Score:5, Interesting)
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Isn't the "fast charge in 5 minutes" clearly aimed at the electricity spongers?
The sort that plug in their phone at your home/office without even asking.
This lets the buggers sponge from virtually anywhere they can find a plug - previously they would have needed somewhere safe/secure to make it worthwhile.
2 ports (Score:3)
So stick 2 charging ports on it and charge the other half of the battery at the same time! ;-)
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Chief: Maybe we should've gone with Max's idea after all.
Larabee: What idea was that, Chief?
Chief: You know, the one where we put 20 charging ports on the phone...
heat generation while charging? (Score:2)
I wonder hoe they are charging them so fast without generating an enormous amount of heat?
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Re:heat generation while charging? (Score:5, Interesting)
The problem isn't so much the transfer voltage, the majority of the heat is being generated by the cells themselves. Electrons moving between the plates generates friction and that generates heat. All charging and discharging batteries generate heat. The Tesla battery is hundreds of volts to minimize transfer loss, but still has to liquid cool the cells and cool that with a radiator, just to keep the pack from melting during charge or discharge.
(you can't use a higher voltage on the individual cells)
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Cells in the battery are still ~4V. Bumping charging voltage means you dont heat up cables, doesnt do much for the cells.
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Or need as thick cables. Ampacity of a cable is determined by cross-sectional area. And Ampacity is independent of voltage - a cable carrying 1V at 100A is the same gauge as a cable carrying 10V at 100A - it's just the insulation will be slightly thicker on the latter. Ditto 100V at 100A - thicker insulation still, but the gauge will be identical as would the power losses through it (IIR losses, which are independent of vol
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Looks like we're the only two in the thread that "get it". Everyone else won't stop talking about resistive losses in the wire... :(
If even 1% of these "new battery tech" stories (Score:1)
I'm reminded of every time there is an article about research into improvements in batteries somebody posts this:
--
Every month there is some article about researchers finding some big improvement that can done with batteries. How come NONE of these improvements ever makes it to product? If even 1% of these new battery technology articles landed in consumer products, put batteries would be so much better by now! It's all bullshit!
--
Apparently (yet again) one of those research projects dis end up with an a
C'mon, that's old news (Score:3)
Facebook and Whatsapp could get your phone to 50% battery power in 5 minutes too. Drain it completely in less than 10.
Yay units ! (Score:3)
10 degrees Celsius cooler (or 50 degrees Fahrenheit)
I see c|net staff writers are just as bad as Slashdot editors...
The hint was in "degree", it's safer to use K when expressing temperature differences, though I wonder if they would've noticed something wrong with -441.67 degree F cooler... (and of course Slashdot doesn't allow the degree symbol, even as °)
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it's safer to use K when expressing temperature differences
10 degrees Kelvin difference is exactly 10 degrees Celsuis difference.
However, 10 degrees Celsius difference is NOT 50 degrees Fahrenheit difference. It's 18 degrees Fahrenheit difference.
Re:Yay units ! (Score:4, Insightful)
Except this was a leap year.
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Except this was a leap year.
And (duh) coronavirus.
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You missed my point.
I was referencing the usage of Kelvin for intervals [wikipedia.org] as a way to avoid the ambiguity between a temperature point and a temperature difference.
If the source material had used 10K instead of 10 deg C, the conversion as a temperature point to deg F should have given the writer pause that maybe something was amiss even without being acquainted with the magnitudes in deg C and K scales.
Side Effects? (Score:2)
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Or, are we expected to buy new phones every couple of years?
Yes. The CEO of Samsung hasn't got to buy a new boat in MONTHS!
There was an Ask Slashdot about smartphone life. (Score:3)
Aaand (Score:5, Funny)
Scale this up to EV's (Score:2)
I'm not going to do the math, but assuming it doesn't take 1.21 gigawatts, 50% in 5 min for a EV would be sweet.
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I'm not going to do the math, but assuming it doesn't take 1.21 gigawatts, 50% in 5 min for a EV would be sweet.
Ok, here's the math. Assuming the losses are the same, and that the same percentage of energy goes into the battery (ie, they claim 1/4 hours for a full charge, 100W source, and ~22.5WH battery (4.5Ah * 4.2V for lithium cells)):
An EV battery is from about 60 kWh to 100 kWh, so, being lazy, we'll pick 90 kWh since it's exactly 4000 times the estimated cell phone battery energy.
So that's your answer - you need some combination of increased voltage and current that gives you 4000 times the power, or 400kW, in
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Max power from 240 v 50 amp circuit is around 10 kW. ( Assuming breaker is rated for 40 amp continuous draw).
To be called L3, minimum is 50 kW. Most CCS are.
Tesla supercharger (version 2) is rated for 128 kW
Supercharger v3 is rated for 250 kW
Porsche 800 v system is designed take 400 kW but very few such public chargers exist
But for an EV it is not the rated max power available that limits the charging speed. 90 kWh Taycan won
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I have only used the supercharger a few times and it was the old V2 so max 150kW. :D
I added 31% in 10 minutes from 19% to 50%. But from 50% to 85% took around 20 minutes. I didn't keep an eye on it all the time but I suspect it was the last percent that was the slowest because at 85% it was down to 32kW.
I have seen examples of people charging on faster stations getting 200kW in the beginning.
So we are getting closer.
Requires a special charger (Score:2)
The higher amperage charger will be known as the 'Kaboom!' charger.
QC please die! (Score:3)
We're finally in a position with USB4 mandating USB-PD that we're almost free of the horribly "do you feel lucky punk" approach to your fast charger maybe fast charging. USB-PD is more than fast enough to get a phone up to speed.
Please Qualcomm let us be!
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The problem is that USB-C isn't a standard, it's a connector choice. It allows electrical signaling, but doesn't mandate what that looks like, and with good reason since defining the signaling with the connector would prevent upgrades. The best we could hope for is mandating USB-PD on USB 3.2 Gen 1x2 or 2x2, as that so far is the only standard which doesn't allow USB-A connectors, but the reality is that wouldn't change anything because there's very close to no dual lane devices actually on the market.
USB 4
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I didn't say it didn't. I said it's up to the software to negotiate the direction, and devices which have the use case of both charging or discharging should defer that decision to the user which your powerbanks clearly did not do. The standard offers no ability to discuss who has more charge and as a result its anyone's guess on what happens when you connect two poorly designed bi-directional devices to each other.
Multiple discrete batteries (Score:1)
Phones that charge this fast usually have multiple discrete batteries that get charged simultaneously so it doesn't seem to be that bad for wear and tear.
At what cost to the battery (Score:2)
CSB
Back in '06 or '07 I was working as a, I dunno, call it a "traveling expert" for QC, working with a woman from Israel. We were shooting the shit one day and I mentioned the battery charging code was some of the best code I'd ever seen. She said "wanna meet the guy who wrote it". Me: "yeah, I'm good". "No come on, he's right over here".
Some 20 s
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Feature masquerading as a way to make you upgrade (Score:3, Insightful)
Don't fall asleep (Score:2)
"more than 100 watts of power to speedily"
Through tiny connector pins that get dirty/loose developing a resistance point that heats up and burns. No thanks.
USB-C should have been designed with larger side pins to handle these kinds of loads.