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Micro-Sized Battery Promises to Deliver Power That Is Anything But

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far911
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Silver
Re:Murphy's Law
far911   5/31/2013 3:16:01 PM
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At this point, it doesn't matter how long the battery can last, but how long it can hold its charge capacity over a period of usage. It's important to maximize the number of charge cycles the battery can offer so that people don't have to replace their batteries very often. 

Amclaussen
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Platinum
Re:Murphy's Law
Amclaussen   5/31/2013 2:34:39 PM
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I was trying to overemphasize that...  as a funny comment, as in: "Murphy came up short..."

But on the serious side, I frequently find inexperienced engineers tend to understimate the power of Murphy's Law.  And NOBODY is free from it.

At my home shop, I have dedicated an entire wall to Murphy's memory, writing in large, clearly readable letter sizes the famous corolaries of that infamous law, along with a right hand side space, where I put a clean slate to write down every goof I do.  The other day I was finishing an Auto transmision fluid change and flushing, and had hand threaded 13 of the 14 screws that hold the transmission pan to the transmission body, happily singing "I'm almost done, tra la la..." when I noticed a little O'ring on the floor, almost laughing at me; I had forgotten to place it on the filter inside the pan, and now I had to take out all the pan screws, remove the pan (already stuck with silicone sealer, guaranteeing a sticky mess), and the filter.  That proved Murphy is still active! ;-)

Ann R. Thryft
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Blogger
Re:Murphy's Law
Ann R. Thryft   5/31/2013 12:35:58 PM
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Hmmm, so if Murphy's law says something always goes wrong and that's an optimistic statement, that means the number of things going wrong exceeds the number of things that happen in the first place which could go wrong. Can you explain the math? :) Or did I miss something?



NadineJ
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Platinum
Re: Liquid metal
NadineJ   5/31/2013 11:13:02 AM
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Agreed.  We seem to moving in a poor direction towards battery innovation.  But, a little optimisim helps.

a.saji
User Rank
Silver
Re: Well said Cabe.
a.saji   5/31/2013 1:14:16 AM
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@watashi: Im not sure if its practical since the battery power is designed based on the usage not on the time frame. So the more you use the quicker it dies.   

SiliconGraybeard
User Rank
Silver
Wait - That Can't Be Right??
SiliconGraybeard   5/30/2013 6:14:28 PM
Wait - that can't be right, can it? "30 times farther"?

RF requires 3 dB more power to go twice the distance. 30 times farther is close to 5 doublings or 2^5. 30 dB more power is 1000x the power.

Amclaussen
User Rank
Platinum
Re:Murphy's Law
Amclaussen   5/30/2013 2:41:48 PM
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EXACTLY: I cannot find the battery charger for my video camera, that I seldom use.

Murphy was right of course, but he was an optimist too.

Watashi
User Rank
Platinum
Re: Well said Cabe.
Watashi   5/30/2013 2:15:20 PM
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How about a smart phone that only needs charged once every couple of months!

But, I'd probably just end up losing the charger if I needed it that infrequently.

Ann R. Thryft
User Rank
Blogger
Re: Liquid metal
Ann R. Thryft   5/30/2013 1:01:27 PM
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Elizabeth, I echo your hope. I've seen so many new battery technologies proposed or introduced over the last few decades without turning into a new trend in battery design that I don't get as excited as I used to. Let's hope this one is truly different.

Amclaussen
User Rank
Platinum
Well said Cabe.
Amclaussen   5/30/2013 11:27:55 AM
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Article says: "there is a general tradeoff when designing for battery capability -- either you get a high-capacity, low-power battery, or, a high-power, low-capacity battery..." Well said. Up to now, that has been almost a law! Let's see how this subject evolves in the near future (I hope!). I dream of a set of powerful electric hand tools powered by still more powerful, compact and lightweight batteries that can be recharged in a couple of minutes. Present day LiIon's are a step above NiMetal, which were only a moderate improvment over the NiCads.

Amclaussen.

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