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Participant

Join Date: Jan 2007
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High-Power, Low-Weight Lithium Battery

01/19/2007 4:59 AM

Hello friends,

I want to make an automobile(car) that gets power from the electric battery.So,can anybody tell me that could I get more power from lithium battery than other batteries,having same weight?

I want to have high power and low weight battery.So,please send me the list of lithium batteries showing weight,voltage and power rating and time it can serve.send me the company e-mail id to get it.

Thank you,

Trushar Shah

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Guru
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#1

Re: Can any body tell me about lithium battery??

01/19/2007 6:57 AM

I'm sure battery manufacturer's will fall over themselves to give you all the information you need.

John.

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Guru
Engineering Fields - Manufacturing Engineering - United Kingdom - Member - Get things done!

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#2
In reply to #1

Re: Can any body tell me about lithium battery??

01/19/2007 9:54 AM

Are John, I see you have a very British disease…………………..

Main Entry: sar·casm
Pronunciation: 'sär-"ka-z&m
Function: noun
Etymology: French or Late Latin; French sarcasme, from Late Latin sarcasmos, from Greek sarkasmos, from sarkazein to tear flesh, bite the lips in rage, sneer, from sark-, sarx flesh; probably akin to Avestan thwar&s- to cut
1 : a sharp and often satirical or ironic utterance designed to cut or give pain
2 a : a mode of satirical wit depending for its effect on bitter, caustic, and often ironic language that is usually directed against an individual b : the use or language of sarcasm
synonym see WIT

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Anonymous Poster
#4
In reply to #2

Re: Can any body tell me about lithium battery??

01/20/2007 2:54 AM

I'm here to tell Trushar: Yes somebody can tell him he that he could get more power from lithium battery than other batteries having [the] same weight? So if John leads him to such somebodies, how is that sarcasm? Are they falling over themselves from improperly toting batteries?

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Guru
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#3

Re: Can any body tell me about lithium battery??

01/19/2007 3:57 PM

Here's a list of suppliers, friend.

GlobalSpec also lets you search by specification, too.

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Guru
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#5

Re: High-Power, Low-Weight Lithium Battery

01/20/2007 7:41 AM

Ok skipping the lesson in the finer points of the use of the English language the short answer is YES, BUT!

Be warned Lithium batteries tend to be very unforgiving and are prone to a problem called thermal runaway which is commonly followed by the sudden and instantaneous release of all the energy stored in the battery. Put simply charge or use them incorrectly and they will explode.

You will find that the battery suppliers are quiet reticent to supply Lithium batteries to people they are unsure about. Unless you can demonstrate to them that you know what you are doing you will have trouble sourcing them.

Having said that most suppliers will work with you to design and package batteries to you specifications so it probably easier to just give suppliers your requirements and let them do the work.

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#6
In reply to #5

Re: High-Power, Low-Weight Lithium Battery

01/20/2007 2:19 PM

Litium batteries, they could call them leathal batteries. Be extremely carefull using them. For more power , if weight can be less of a problem (perhaps SUVs are the best vehicules ...) you can use series batteries, more voltage will give you more power with less ah. Solomon industries use 144 v. Leathal too but predictable, and the new solar photovoltaic cells are promising. My neighbor was the engineer in the developpement of very powerfull batteries used for the electric wheels car (hydro quebec) , they retrofited a chrysler intrepid with this technology. A combination of propulsion energy is likely to be the near futur. Hybrid fossil / electric is promising, simply in the fact that one has started somewhere and better efficiencies will emerge. If you remember the old model t and now ... there might be light at the end of the tunnel using the wankle engine (rotary engine ... Mazda) , it could probably be combined with an electric motor. it makes more sence than the stop and go piston engine. Many fires and explosions occured using these batteries. I hope you succeed in your project. i will ask my neighbor, for the 3 rd time , if he knows dependable ... safe lithium batteries ...

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Associate

Join Date: Nov 2006
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#7

Re: High-Power, Low-Weight Lithium Battery

01/22/2007 3:23 AM

Why you all try with a fuel cell based power supplies, it is less weight and deliver more power.

K.P.Mahalingam,

Electrical and Electronics engineer,

INDIA.

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Guru
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#8
In reply to #7

Re: High-Power, Low-Weight Lithium Battery

01/22/2007 5:11 AM

Basically because hydrogen is prone to releasing all the stored energy instantaneously even more than a lithium battery. Put simply H2 explodes even better than Li.

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Power-User

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#9
In reply to #8

Re: High-Power, Low-Weight Lithium Battery

02/25/2007 7:20 PM

OK, lithium besides being stiky, releases H in the process, what do you do with H, you have to sponge it for gradual release. various chalenges with lithium batteries. so far from what i know, polymer film coating is the way to go around lithium. imagine packaging metal straps sandwiched with polymers. other chalenges is temperature, at low temp. it is not as efficient. i beleive the weight ratio could be as low as 10 times less than a acid lead. agm a bit less. firewalls (shortcircuiting) have to be integrated in case of an accident (car crash etc) , environmental (waste dumps) issues is less problematic i understand than nik cad batteries. lead/acid batteries have their issues too. At a small scale, it can be dealt with but at a large scale ?

Fuel , being fossil, (liquid or solid) , or H, or Nuc, or Food, etc, is basically a battery, the idea is to have the least leathal emanations (greenhouse or simply toxic) possible for the energy needed to do the tasks. either being at the production of the fuel or at its final use. H is probably the closest to Avalon. It is easy, ... to transform a gas engine to H engine . All these existing vehicles ... think recycle or dont think.

i am designing an amphybious car, human and small electric assist motoring. will be used as dingies and street car. You can suggest any look for it.

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