In 1 Year, We’ll See An Electric Car Battery That Recharges In Only 3 Minutes? – (w/video)

JAN 23 2015 BY MARK KANE 30

StoreDot

StoreDot

Israeli start-up company StoreDot presented at CES 2015 a smartphone equipped with a very fast charging battery.

Less than 3 minutes is needed for a recharge.

StoreDot ensures that such batteries could be used in electric cars and already is in discussion with some manufacturers, but we know that the problem does not lie in battery itself, but in the high power levels needed for 20C charging.

To charge a 25 kWh battery pack in 3 minutes, at least 500 kW of power would be needed. Anyways, Doron Myersdorf, the company’s chief executive, said that a demonstration vehicle will be built in one year.

By 2017, StoreDot would like to develop batteries, which will not only be able to recharge fast, but also store a comparable amount of energy to other lithium-ion batteries (which is another drawback typically of a lot of “breakthrough” batteries):

“It also involves using a completely new type of battery, which contains specially synthesised organic molecules.

“We have reactions in the battery that are non-traditional reactions that allow us to charge very fast, moving ions from an anode to a cathode at a speed that was not possible before we had these materials,” explains Doron Myersdorf, the company’s chief executive.”

“Storedot has a 2017 goal of matching the energy density – the amount of energy stored per kilogram – of its own batteries and the lithium-ion ones commonly found in existing handsets.

The firm’s prototypes currently deliver about a third of that rate, meaning the normal-sized handset used in the demo only held 900mAh of juice, and would have to be recharged several times a day were it deployed now albeit only taking two minutes to do so each time.

The company also showed off a 2,000mAh battery, which took three minutes to recharge, but the phone that housed it had been made 5mm (0.2in) thicker than normal to accommodate its girth.”

StoreDot already raised $48.5M. $10M of that comes from Russian tycoon Roman Abramovich.

Source: BBC

Categories: Battery Tech, Videos

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30 Comments on "In 1 Year, We’ll See An Electric Car Battery That Recharges In Only 3 Minutes? – (w/video)"

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Sublime

So they only need to triple energy density in the next 2 years? Seems totally doable /fantasyland

Joshua Burstyn

I might be way off base here but the phone looks to be a Samsung Note 2. I believe the battery that comes with that phone is a Lithium Polymer type with a 3300mAh capacity. And it is slimmer than the battery shown. Energy density on this purported breakthrough battery may not be that awesome… considering LiPo prismatic cells are already lower energy density than NMC or particularly cylindrical NCA.

kubel

Looks like a Galaxy S3.

JakeY

We already have plenty of rapid charging batteries (a123, altair-nano), but the problem is that energy density is lower, so you end up with a smaller pack and worse $/kWh. The latter problems are a lot more important than the c-rate charging speed.

SIvad
There are other questions as well. Like what is a healthy percentage of DOD and how many charge cycles to 80% of original capacity? Also are they able to be produced cost effectively using existing manufacturing processes? If those are on par with existing automotive Li-ion batteries then it wouldn’t be unreasonable to use them even with 1/3 the density. For example, if you had a 85 kWh pack like in the Model S you would still get an EPA range of 88 miles which is the same range as many of the cheaper EVs out there now but you would still have the performance of the Model S. That would still cover 90% or more of most average drivers miles in a day. Charging in your garage would cover most of your daily miles but if you ran short then you would stop just like you do now for gas and charge in 3 minutes. Even on trips it would work assuming you had chargers every 50 miles or so. You would have to stop every hour or hour and a half but it would be short. It would be a trade off but it would certainly silence the… Read more »
Lensman

Yes, the number of charge cycles possible with this battery was my first question. I think I read an article recently about a battery which could be charged very rapidly… but which was good for only about 10 charge/discharge cycles.

There are many factors which have to be balanced, to create useful EV batteries: cost, energy density, charge/discharge tolerance, high/low temperature tolerance, ability to charge quickly, thermal stability when charging. Maximizing one factor at the expense of others isn’t how you make a commercial product; it’s just a publicity stunt.

Lustuccc

This is the best part of EVs. We know that batteries will get lighter, trhat they will recharge faster and that they will pack a lot more energy in the same volume.
…And that this will never happen for this multi target poison called gasoline.

ModernMarvelFan

I am NOT here to defend gasoline, but gasoline are getting cleaner as well (required by laws). That is why we have to switch formulas between season.

Also, one way to improve the gasoline cars on range is by increase gasoline tank (easier than battery) or make the engine more efficiency thru Atkinson engine or turbo charging…

Nick

Extracting oil is getting much dirtier, which effectively makes gasoline worse as well.

arne-nl

+1

mike w

That is correct!!! The ERO for oil has been dropping like a rock. Look at tar sands with an REO of something like 2.

Lensman

We see articles about some breathtaking new claim for a breakthrough in EV battery tech, on average, more than once a month these days. When reading one of these claims, just remember this quote:

“My top advice really for anyone who says they’ve got some breakthrough battery technologies, please send us a sample cell, okay, don’t send us PowerPoint. Just send us one cell that works with all appropriate caveats; that would be great. That… sorts out the nonsense and the claims that aren’t actually true. Talk is super cheap; the battery industry has to have more B.S. in it than any industry I’ve ever encountered. It’s insane.” –Elon Musk, Nov. 5, 2014

evnow

You have come a long way from eestor days 😉

Murrysville EV

In addition to cycling, how about cold temperature performance?

1/2 megawatt – that’s hard to fathom in a charger, or in a civilian’s hands.

Ryan

If they have a real battery; they need to send it to Tesla for evaluation if they want it built in the gigafactory.

Speculawyer

Isn’t this just a capacitor that they charge up and then it slowly charges the battery?

Someone out there

The issue of fast charging isn’t on the battery side. We already have Lithium Titanate for that.

The issue is providing enough juice to recharge a car in 3 minutes.

MikeM

Not only that, but to charge at 500kW at, say, 95% charge efficiency, you still have to dissipate or blow away 25kW of heat. That’s like 20 or so small room heaters blasting away underneath your EV.

For an 85 kWh battery, that would be going on for more than 10 minutes.
I’m guessing that’s far beyond the capabilities of the typical battery thermal management system.

Let’s not get too carried away folks. Supercharging has it’s limits!

The charger would not only need to supply the electricity, it would also need to supply cooling liquid, that get pumped through a stationary cooling tower.

arne-nl

No we don’t need to blow away 25 kW of heat, we just let the battery heat up a bit.

Let’s charge the battery without cooling:

5% of 25 kWh = 1.25 kWh = 4.5 MJ of heat that goes into 200 kg of battery. This is 22,5 J/g. Say the specific heat of the materials in the battery is 1 J/g, then the battery would heat up by 22 degrees c without any cooling.

These parameters may change if the battery is more efficient.

If they can demonstrate it in a cell phone, without any cooling system at all, why wouldn’t it work in a scaled up version?

arne-nl

“1 J/g” –> “1 J/g/C”

Because the single cell can dissipate heat to all sides, multiple cells in a pack will heat up each other.
Also, this demo cell is cold at the beginning of the demo, the pack might already be hot from driving at a hot summer day, when you arrive at the charging station.

arne-nl

if the charge time is short enough, the battery can hardly dissipate the heat and has absorb all of it. whether or not it is alone or packed together is not a difference for very short charge times.

If the battery is heated up significantly from driving, then the cooling system of the battery is bad to begin with.

Different chemistries have different sensitivities to heat, so let’s not make up problems that are likely not an issue at all.

Spider-Dan

The battery can (and must) dissipate the heat at any duration of charge time, so I’m not sure where you’re going with that statement. There’s no way you’re going to be using passive cooling at these energy levels, so the batteries must be cooled at the same time they are being charged.

arne-nl

See my answer below, it is not a problem.

arne-nl

“but we know that the problem does not lie in battery itself, but in the high power levels needed for 20C charging.”

Since when is a puny 500 kW a problem for the grid? What on earth are these guys thinking? What do you think the average factory or office is using?

In the Netherlands, Fastned has a 3×1000 A (750 kW) connection for each of it’s fast charging stations and if more is needed, they only need to phone the energy company for an upgrade.

Ok, so let’s all cut that “the grid will collapse” scare mongering, shall we?

Someone out there

I never said anything about the grid collapsing. Feeding 500 kW or more to the car would be a real problem. It would require a huge cable with delivering huge amps at a very high voltage.

I believe Tesla’s superchargers are at 135 kW for each stall and there are multiple stalls at each site. The power is supplied by a stationary battery bank that recharges from solar panels and/or the grid at off peak hours at a much slower rate!

Priusmaniac

That is why it would be good to charge the car with large contacts underneath the car in an automatic way.

arne-nl
I am glad we can agree that the grid will be fine. Tesla’s technology is alreay feeding 135 kW into a car, and I don’t know the design limit. Do you? I believe Elon hinted at going beyond 135 kW, 160 kW iirc. So perhaps their current technology is capable of 160 kW. Or 200 or mabe even 250. I don’t know. Not knowing is not the same as not possible. My problem with most of this kind of comments is that it is based on reasoning from ignorance. “If I don’t know how it can be done, it is a problem”. Priusmaniac’s suggestion is a clear illustration of the limitations of such reasoning. If we already have technology to robotically swap out an entire battery pack from under a car, then it is certainly feasible to have a robotic connector that directly plugs into the battery pack from below. Cable thickness and/or connector size then obviously do not pose any limitation. And no thick cabling is needed inside the car. Another possibility is the development of carbon nanowires that have far lower resistance than copper and thus enable thinner wires to transport higher currents. I dare to go so… Read more »