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rpl3000
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Gold
Emotional responses?
rpl3000   6/3/2013 7:14:32 AM
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I think the conclusion everyone is making skewed by recent news. Why does everyone think the decision is wrong? Do we know all the design requirements or risks? In the near future I think Li-ion battery thermal runaways will be as commonplace as boilers blowing up.

Elizabeth M
User Rank
Blogger
Re: Risky choice
Elizabeth M   6/3/2013 4:41:26 AM
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You're probably right, shehan. Too much is at stake.

g_ost
User Rank
Gold
Re: Risky choice
g_ost   6/3/2013 4:34:49 AM
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"Japan Airlines said it halted a scheduled 787 Dreamliner flight on Sunday after engineers detected a faulty pressure sensor in one of its newly reinforced lithium-ion batteries, replacing the aircraft with an older 767"

what about this? the problem is not only with the technology, the main problem is outmarch for profit: it makes companies blind. Where are the maintenance quality controllers? I the additional quality control too expensive? Are the risks to low?

"The fault which affected the Tokyo-Beijing flight on Sunday was caused by tape that had been mistakenly left over the pressure sensor when Boeing engineers installed the new batteries, Japan Airlines said in a press release. No fault occurred in the battery, the airline said"

Phil Pearce
User Rank
Silver
Re: Risky choice
Phil Pearce   6/1/2013 3:48:04 PM
tekochip, I was pleased to read that you were not too seriously injured following your experience with a lithium battery.  As you rightly point out lithium is very volatile and batteries based on this chemistry should be treated with extreme caution. For those interested here are a few statistics involving lithium based batteries technology.

Sanyo recalled 1.3 million cellphone batteries in 2006 on concerns those batteries could overheat or catch fire.

Nokia offered toreplace 46 million cellphone batteries manufactured by Matsushitain 2007due to overheating risks.

Hewlett-Packard recalled 70,000 lithium-ion batteries in 2009, 54,000 in 2010, more than 162,000 in 2011 that were used in HP and Compaq notebook / laptop computers, over concerns they posed "fire hazards to consumers."

There are also a number of incidents involving the lithium-ion batteries used in electric vehicles suffering from thermal runaway and catching fire.  And as Amclaussen rightly points out the Radio Modeling fraternity have suffered a large number of incidents due to the battery packs used in electric powered models combusting.

 

Here is a link to a video of a laptop computer battery fire: http://www.youtube.com/watch?v=vMl_u0J6IpA

 

As a research scientist and having an interest in lithium-ion battery technology I have spent several years developing a solution to make these batteries a much safer technology.  This has resulted in a low cost system that is able to prevent thermal Runaway and combustion before it occurs.

phil.pearce@ieee.org

shehan
User Rank
Gold
Re: Risky choice
shehan   5/31/2013 7:14:46 PM
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@g_ost - Batteries operating on that climate is something that need to be researched and tested before manufacturing. 

shehan
User Rank
Gold
Re: Risky choice
shehan   5/31/2013 7:13:05 PM
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@a.saji – Its always good to do a ground study and some research on these before investing large sums on these projects, else the money is just in vein,

shehan
User Rank
Gold
Re: Risky choice
shehan   5/31/2013 7:11:29 PM
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@Ann – they must be spending pretty big on these projects, these material are never cheap. 

shehan
User Rank
Gold
Re: Risky choice
shehan   5/31/2013 7:10:03 PM
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@Elizabeth – I don't think NASA will repeat that mistake, especially now that they have learnt their lesson.

shehan
User Rank
Gold
Re: Risky choice
shehan   5/31/2013 7:07:47 PM
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@Ann – I'm sure the equipment on these unmanned satellites must be a large amount and now the batteries. Can't they work on solar panels, I thought they already have them installed?

Ann R. Thryft
User Rank
Blogger
Re: Risky choice
Ann R. Thryft   5/31/2013 4:35:48 PM
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far911, are you referring to the ISS or to satellites? Please clarify.

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