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prabhakar_deosthali
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what about EV battery fast charging?
prabhakar_deosthali   4/10/2014 1:27:50 AM
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In my mind, I am just trying to extrapolate the use of this technology for fastcharging of EV batteries. 

It would be a revolution and major push for EVs to become more acceptable means of daily commuting

Etmax
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Re: what about EV battery fast charging?
Etmax   4/10/2014 1:50:54 AM
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I too was initially puzzled, but what they seem to be saying is that you would make a battery from this that could accept charge much faster than conventional batteries.

Currently the thing limiting the charge rate is how fast the chemicals in the  battery can recombine. This seems to behave more like a capacitor.

Is the voltage relatively stable over the discharge range like a battery or drooping at a exponential rate? That I don't know, but I think there may be limits as to how quickly you can draw from the grid creating a substantial market for intermediate storage as well.

bpaddock
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TAIYO YUDEN Lithium Ion Capacitor
bpaddock   4/11/2014 10:58:28 AM
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TAIYO YUDEN has had a Lithium Ion Capacitors on the market since 2010.

3.8V @ 270F from distribution is about $60 each.

Hopefully these newer ones will have more realistic pricing, if they ever reach production (Seems few of these announced products ever do.  When can I buy my first Graphene based anything from distribution for example?).

 

 

UltrasonicBill
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High Current
UltrasonicBill   4/11/2014 5:32:50 PM
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Something's wrong here (possibly my understanding). A major online retailer lists replacement batteries for a Galaxy S5 rated at 2800mAh. This is 10,800 coulombs. To transfer that amount of charge in 30 seconds would require over 300 amps. I don't want to be standing nearby.



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As data rates begin to move beyond 25 Gbps channels, new problems arise. Getting to 50 Gbps channels might not be possible with the traditional NRZ (2-level) signaling. PAM4 lets data rates double with only a small increase in channel bandwidth by sending two bits per symbol. But, it brings new measurement and analysis problems. Signal integrity sage Ransom Stephens will explain how PAM4 differs from NRZ and what to expect in design, measurement, and signal analysis.

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