[Elecraft] Battery news

[David Gilbert]

I wouldn't be surprised if the article was legitimate.  It basically 
refers to a method of increasing the internal density of a lithium-ion 
cell via a microscopic 3-dimensional structure.  There's nothing 
theoretically outlandish about that ... it's just difficult to do in 
practice.  Capacitors already use the same principle and nobody thinks 
of them as an April Fool joke.

I do worry about one aspect of this sort of thing, though.  Packing lots 
of energy in a small volume with low enough resistance to access it very 
quickly is already a concern with normal lithium-ion batteries.  When I 
worked in the semiconductor industry one of our key products was a FET 
used as a current limiter so that Li-I cells wouldn't "rapidly 
disassemble".   The recent laptop fires and Dreamliner problems 
illustrate some of the jeopardy.  Putting the equivalent of a car 
battery in a pacemaker or hearing aid battery would give me pause ...

73,
Dave  AB7E





On 4/17/2013 2:35 PM, Lynn W. Taylor, WB6UUT wrote:
> They were primarily talking about cell phone batteries charging in the 
> blink of an eye, not car batteries.
>
> Speaking of which, when was the last time any of us the battery in our 
> car -- driving not included?
>
> I think the article is legit.  The sources trace back to the 
> University, and none of the dates are within two weeks of April Fool's 
> Day.
>
> It could take a long time for this to get from the lab to consumers, 
> but it's encouraging.
>
> 73 -- Lynn
>
> On 4/17/2013 2:26 PM, drewko wrote:
>> Might have to upgrade the house wiring before charging one of these
>> miniature "car" batteries. Not sure a 20-amp circuit is going to be
>> able to do that in the "blink of an eye", fancy red and yellow milk
>> crate graphics not withstanding.
>>
>> Perhaps when we all have cold fusion reactors in our closets. Aren't
>> they about ready for marketing yet? Seems like it's been a while...
>>
>> 73,
>> Drew
>> AF2Z
>>
>>
>>
>>
>> On Wed, 17 Apr 2013 11:32:50 -0700, Kevin.  KD5ONS wrote:
>>
>>> http://www.rdmag.com/news/2013/04/new-microbatteries-boost-electronics
>>>
>>> Maybe we will be able to shrink the batteries down to something easy to
>>> carry on that day hike up the mountain.
>>>     73,
>>>          Kevin.  KD5ONS
>>>
>>
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