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polymer battery? #161976
04/11/07 06:03 AM
04/11/07 06:03 AM
Alan Belson  Offline OP
Member
Joined: Mar 2005
Posts: 1,803
Mayenne N. France
My pal Tom turned up this morning on a new electric bicycle he'd bought over from England. It has L-ion batteries, but he was told that for another £100 he could have had the "new polymer batteries". Anyone know what these are?


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Re: polymer battery? [Re: Alan Belson] #162013
04/11/07 07:27 PM
04/11/07 07:27 PM
noderaser  Offline
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Joined: Mar 2007
Posts: 404
Portland, Oregon, United State...
Lithium-Polymer batteries are often used in cellphones, and other applications where weight is key. Instead of suspending the electrolite in a solvent like LiIo batteries, they are mixed with a polymer, pressed into sheets and laminated onto each other. Because they are constructed of laminated layers, a metal casing isn't needed, so they are much lighter and can be constructed in a variety of odd shapes and sizes. They are also non-flammable.

Re: polymer battery? [Re: noderaser] #162108
04/13/07 05:02 AM
04/13/07 05:02 AM
Trumpy  Offline

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Joined: Jul 2002
Posts: 8,250
SI,New Zealand
Originally Posted by noderaser
Lithium-Polymer batteries are often used in cellphones, and other applications where weight is key. Instead of suspending the electrolite in a solvent like LiIo batteries, they are mixed with a polymer, pressed into sheets and laminated onto each other. Because they are constructed of laminated layers, a metal casing isn't needed, so they are much lighter and can be constructed in a variety of odd shapes and sizes. They are also non-flammable.


OK then,
What is thier charge-discharge cycle time like?.
Do they require a dedicated type of charger?.
Is thier amp-hour rating comparable to what is currently in use?.
Would a fuel-cell be better, in this application?.

Re: polymer battery? [Re: Trumpy] #162160
04/13/07 09:37 PM
04/13/07 09:37 PM
noderaser  Offline
Member
Joined: Mar 2007
Posts: 404
Portland, Oregon, United State...
From what I've heard, they have standard mAh/Ah ratings, but the technology is still a little behind in the durability department. While a fuel cell would probably be "better" than using batteries in a lot of applications, the cost probably overwhelms the benefits.


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