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
Page 1 / 2 Next >
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
As an industry, we now need to up our game and provide contractors with easier ways to properly identify and report counterfeit products and build collaboration between manufacturers, design engineers, industry organizations, and government.
Itís your job to find the right people, ask the right questions, to dig deeper, and properly prepare your users so they can provide you the most useful and productive answers possible.
The shift to aluminum is gaining momentum and the demand from automakers for aluminum is soaring, "expecting to reach one billion pounds this year, up from 200 million in 2012, and to grow by more than 30% annually through 2020."
Einstein in a Box inspires critical thinking with the actual doing and experiencing. They take the statement "inquiring minds want to know" to a whole new level.
Negligence results when an engineer has failed to comply in ways in which a responsible engineer would in a similar situation. Avoiding negligence means that an engineer should not fail in his or her assigned duties.
Design News Webinar Series
3/27/2014 11:00 a.m. California / 2:00 p.m. New York / 7:00 p.m. London
2/27/2014 11:00 a.m. California / 2:00 p.m. New York / 7:00 p.m. London
12/18/2013 Available On Demand
11/20/2013 Available On Demand
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Apr 21 - 25, Creating & Testing Your First RTOS Application Using MQX
SEMESTERS: 1  |  2  |  3  |  4  |  5


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.
Next Class: April 29 - Day 1
Sponsored by maxon precision motors
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Sponsored Content

Technology Marketplace

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
Copyright © 2014 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service