HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
Blogs
Guest Blogs

Ultracapacitors, Batteries Join Forces for Fuel Efficiency

NO RATINGS
< Previous Page 2 / 2
View Comments: Oldest First|Newest First|Threaded View
Page 1/2  >  >>
Rob Spiegel
User Rank
Blogger
Ultracapacitors to the rescue
Rob Spiegel   6/7/2013 9:11:26 AM
NO RATINGS
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.

naperlou
User Rank
Blogger
Who uses them
naperlou   6/7/2013 10:36:54 AM
NO RATINGS
Jeremy, could you give some examples of vehicles these are used in?  I fully agree with your points, but I have not heard much about applications. 

Gorski
User Rank
Platinum
Ultracapacitors, batteries join forces for fuel eficiency
Gorski   6/7/2013 9:17:53 PM
NO RATINGS
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.

Greg M. Jung
User Rank
Platinum
Re: Ultracapacitors, batteries join forces for fuel eficiency
Greg M. Jung   6/8/2013 6:07:24 PM
NO RATINGS
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?

tekochip
User Rank
Platinum
BOM Vs Performance
tekochip   6/9/2013 11:46:13 AM
NO RATINGS
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.


TJ McDermott
User Rank
Blogger
Re: Who uses them
TJ McDermott   6/9/2013 7:54:58 PM
NO RATINGS
I'd like to know what vehicles they are used in as well.

jhankwitz
User Rank
Platinum
Surge Currents
jhankwitz   6/10/2013 10:39:54 AM
NO RATINGS
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.

Jim S
User Rank
Gold
This would require a really large cap
Jim S   6/10/2013 12:21:35 PM
NO RATINGS
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?

Ratsky
User Rank
Platinum
Re: This would require a really large cap
Ratsky   6/10/2013 3:47:57 PM
NO RATINGS
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!

Jim S
User Rank
Gold
Re: This would require a really large cap
Jim S   6/10/2013 4:01:25 PM
NO RATINGS
Agreed

Page 1/2  >  >>
Partner Zone
More Blogs from Guest Blogs
Iterative design — the cycle of prototyping, testing, analyzing, and refining a product — existed long before additive manufacturing, but it has never been as efficient and approachable as it is today with 3D printing.
People usually think of a time constant as the time it takes a first order system to change 63% of the way to the steady state value in response to a step change in the input -- it’s basically a measure of the responsiveness of the system. This is true, but in reality, time constants are often not constant. They can change just like system gains change as the environment or the geometry of the system changes.
At its core, sound is a relatively simple natural phenomenon caused by pressure pulsations or vibrations propagating through various mediums in the world around us. Studies have shown that the complete absence of sound can drive a person insane, causing them to experience hallucinations. Likewise, loud and overwhelming sound can have the same effect. This especially holds true in manufacturing and plant environments where loud noises are the norm.
The tech industry is no stranger to crowdsourcing funding for new projects, and the team at element14 are no strangers to crowdsourcing ideas for new projects through its design competitions. But what about crowdsourcing new components?
It has been common wisdom of late that anything you needed to manufacture could be made more cost-effectively on foreign shores. Following World War II, the label “Made in Japan” was as ubiquitous as is the “Made in China” version today and often had very similar -- not always positive -- connotations. Along the way, Korea, Indonesia, Malaysia, and other Pacific-rim nations have each had their turn at being the preferred low-cost alternative to manufacturing here in the US.
Design News Webinar Series
11/19/2014 11:00 a.m. California / 2:00 p.m. New York
11/6/2014 11:00 a.m. California / 2:00 p.m. New York
10/7/2014 8:00 a.m. California / 11:00 a.m. New York
12/11/2014 8:00 a.m. California / 11:00 a.m. New York
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Dec 1 - 5, An Introduction to Embedded Software Architecture and Design
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6


Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.
Last Archived Class
Sponsored by Littelfuse
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Sponsored Content

Technology Marketplace

Copyright © 2014 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service