Interesting how ultracapacitors helps across the board on fuel savings, not just with electric power. It's good to see the pressure on reducing fuel consumption. It will be interesting to see if this trend holds when oil prices come down. With greater protection and a potential reduction in demand through efficiency, oil, prices should come down over the coming years.
I can follow the wonderful things ultracapacitors can do according to the article. The items listed sound logical and seem to be exiating technology. So why haven't we seen or heard about automakers doing these things? Are they married to battery makers? As far as gasoline prices going down when consumption does I don't think that will ever happen. If it does it will be in far, far distant future.
Good article which presents many good points. In addition to the previous question on why we haven't seen these earlier (cost/economic reasons?) it would also be interesting to know the weight per capacity tradeoff (i.e. larger capacitors can carry a larger charge, but are also heavier and can slow vehicle performance). How is the size of the capacitor optimized for each vehicle?
Anytime you have to start up a motor repeatedly a big cap is the way to go. Most of the time the expense of the capacitor precludes you from including it in the design, but an electric car is the perfect application. The Bill of Material cost just isn't as important as performance is. At least, for now.
I have gotten to use super capacitors in an application where battery life was very important.
It will be interesting to see how they manage surge currents. Unlike a battery where the voltage drops considerably when a near dead short occurs as a starter engages, ultra capacitors will instantly pump near infinite current. They'll need to have a very robust wiring and electrical contact switching system to handle this.
The article doesn't address the size of cap needed for this. Let's say we have 1000F. The delta V ov the cap is say 100V on top of the normal 380V rail. This contains enough energy to power a 50Kw motor for 100 sec. assuming everything 100% efficient. While this would fill gaps for accelleration/decelleration, How big and heavy is a 1000F cap rated at say 600V?
Jim, I tend to agree with your statements, but there is so much more that is not disclosed by the author. This is more of a puff piece than what I would expect in something published by engineers for engineers. What is the basic technology? What are the tradeoffs? I remember the earliest ultracaps (just a few years ago) were very low voltage (a few volts WVDC at best) and had an absurdly high internal resistance. What allows these units to be described as essentially lossless? Without some hard information and checkable references, this could easily be pie in the sky!
Truchard will be presented the award at the 2014 Golden Mousetrap Awards ceremony during the co-located events Pacific Design & Manufacturing, MD&M West, WestPack, PLASTEC West, Electronics West, ATX West, and AeroCon.
In a bid to boost the viability of lithium-based electric car batteries, a team at Lawrence Berkeley National Laboratory has developed a chemistry that could possibly double an EV’s driving range while cutting its battery cost in half.
For industrial control applications, or even a simple assembly line, that machine can go almost 24/7 without a break. But what happens when the task is a little more complex? That’s where the “smart” machine would come in. The smart machine is one that has some simple (or complex in some cases) processing capability to be able to adapt to changing conditions. Such machines are suited for a host of applications, including automotive, aerospace, defense, medical, computers and electronics, telecommunications, consumer goods, and so on. This discussion will examine what’s possible with smart machines, and what tradeoffs need to be made to implement such a solution.