HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
<<  <  Page 5/5
Charles Murray
User Rank
Blogger
Re: Why are batteries so hard to design?
Charles Murray   1/9/2012 10:45:08 PM
NO RATINGS
Actually, lithium-ion is today's leader, which is why all the automakers are using it. Lithium-sulfur and lithium-air, two long-range contenders, are so far off that not much has been written about them yet. Here's a starting point on the challenges of Lithium-ion.

 http://www.designnews.com/document.asp?doc_id=222703

More to come.

Ann R. Thryft
User Rank
Blogger
Re: Why are batteries so hard to design?
Ann R. Thryft   1/10/2012 12:31:16 PM
NO RATINGS

Chuck, thanks so much for the link. I want to cover this topic more from the materials standpoint, since there seems to be a lot of research going on, and I want to make sure I focus on what's most useful to our readers.


Kevin
User Rank
Platinum
Re: Big design hurdle to overcome
Kevin   1/23/2012 2:23:26 PM
NO RATINGS
Many good comments by various folks!  Here are my responses to a few:

Alexander:  fuel cells are still ridiculously far from being a cost-effective automotive power source (using ANY fuel, but hydrogen is easiest to implement as far as fuel cells go).  They are also still very low power density - so they need to be large if you want realistic horsepower.  I think we will see some applications in fixed installations long before any automotive applications.

Jerry:  I agree completely - while a "miracle" breakthrough battery would be nice...there are many things that can be done to reduce the energy needed to move the car and therefore make it easier to have a practical and cost-effective EV.  see:  http://www.edison2.com/blog/month/january-2012    These guys won the "automotive X-Prize" usign an ethanol burning engine...but now have an interesting prototype EV version.  114 mile range on 10.5 KWh's.  However, I'll also point out that the low weight and drag of their design also gives awesome performance using fuel-burning engines too.

After researching all the related issues deeply, I find myself scratching my head about what problem the EV zealots think they are solving.  First, modern engines are more efficient than most articles say - the Prius is ~38% efficient, and future versions will certainly acheive over 40%.  That is higher efficiency than the average coal power plant, and in fact higher than the USA average grid efficiency (coal & natural gas to electricity conversion).  The "elephant in the closet" is that EV's do not save energy vs. fuel burning cars (although they do shift from oil fuel to coal+natural gas).

A much more practical solution is to create a liquid synthetic fuel that will supercede gasoline, but leverage all the existing infastructure and vehicle technology.  In the short-term, this could be synthesized from coal and natural gas (cut out the "middle man" of the power plants).  Longer-term, solar-synthesized fuels or biofuels would create a renewable fuel that has all the conveniences of gasoline without the huge trade-offs of EV's.

Kevin

<<  <  Page 5/5


Partner Zone
Latest Analysis
This Gadget Freak review looks at a cooler that is essentially a party on wheels with a built-in blender, Bluetooth speaker, and USB charger. We also look at a sustainable, rotating wireless smartphone charger.
Texas Instruments is rolling out a new microcontroller that could make the design of sensor networks and data logging systems simpler and less costly.
Made By Monkeys highlights products that somehow slipped by the QC cops.
From pitchers and forwards to quarterbacks and defensemen, we offer a peek at some of the more memorable engineers in sports history.
IBM announced it is dedicating $3 billion of funding over the next five years to research and development of new processor technologies.
More:Blogs|News
Design News Webinar Series
7/23/2014 11:00 a.m. California / 2:00 p.m. New York
7/17/2014 11:00 a.m. California / 2:00 p.m. New York
6/25/2014 11:00 a.m. California / 2:00 p.m. New York
5/13/2014 10:00 a.m. California / 1:00 p.m. New York / 6:00 p.m. London
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Jul 21 - 25, Design Products With Bluetooth Low Energy
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.
Next Class: August 12 - 14
Sponsored by igus
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