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Some new battery chemistries on the horizon?

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nuckolls.bob(at)aeroelect
Guest

Posted: Thu Oct 08, 2020 12:31 pm Post subject: Some new battery chemistries on the horizon?

While lithium products are the fair-haired

children in the portable energy storage

sandbox, there's a couple of interesting

technologies being spun-up in the EV

world:



https://tinyurl.com/yy8cqwbe

https://tinyurl.com/y2ptgrjz



These MIGHT find application in aviation

and consumer products with some dispatch.

Contemporary EV batteries evolved up

from the smaller, less energetic

consumer products.  These new kids

on the block will enjoy immediate

success and large scale production in

a particularly battery-intensive market:

EVs.



It seems likely that they could 'spill

out' into the consumer markets  quickly.

It's intuitively easier to evolve-

down a product that's already enjoying

high volume successes.



We'll have to wait and see . . .



   Bob . . .

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nuckolls.bob(at)aeroelect
Guest

Posted: Sat Oct 10, 2020 7:58 am Post subject: Some new battery chemistries on the horizon?

While lithium products are the fair-haired

 children in the portable energy storage

 sandbox, there's a couple of interesting

 technologies being spun-up in the EV

 world:



  https://tinyurl.com/yy8cqwbe



 

  https://tinyurl.com/y2ptgrjz



 

 A follow up on the two articles I cited above . . .



 Here's a more detailed description of the

 tab-less construction of the proposed

 cylindrical cell by Tesla:



  https://tinyurl.com/y4vv7ozl



 Some of you may recall a few years back

 when a start-up in Golden Colorado called

 Bolder Technologies was rolling out

 an improved version of SVLA jelly-roll

 cells.



  https://tinyurl.com/y42v9ztj



 We looked at these at B&C. Examples of

 the 'Start Stick' made appearances at

 OSH about that time too. Truly amazing

 performance . . . when they worked.



 Seems that one, and perhaps the most important

 process to master was how to achieve good

 electrical contact with the (-) and (+)

 plates on each end of the jelly-roll. You had

 to get hooked up to the entire length of the

 exposed edges at each end. Failing that,

 achieving a consistent. 2 milliohm cell

 resistance was not possible. Degradation of

 that connection resulted in rapid failure of

 the cell.



 The company folded in the US and I think

 the idea was sold . . . perhaps a couple

 of times . . . off shore. Haven't hear

 anything about them lately.



 Now, it seems that the smart guys at Tesla

 have a different approach to getting a grip

 on the edges of foils. This may signal a

 quantum jump in cell performance. Cells

 like that would allow folks like AeroVoltz

 to achieve really BIG cranking currents from

 their relatively small packages.



 I recall a conversation with Skip Koss

 (battery guru par excellence at Concorde)

 wherein diminutive cells with good

 cranking might be fabricated into a battery

 module that would fit right onto the back

 of a starter motor . . . zero-length

 fat wires in the cranking circuit.



 For our purposes, this would allow dual

 alternator systems to drop distribution wire

 sizes down to just system loads and take

 the battery out of the operational power

 loop.



 Interesting stuff  . . .



 

   Bob . . .

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