A123 20Ah Prismatic Cells

[SlyCayer]

Hi,

I am currently purchasing some 20Ah Prismatic Cells, I did a Ah test on the top grade version and they are very close to the 20Ah.

I am wondering if any of you are interested in purchasing with me, I am buying them for $55.00 USD + shipping.

Let me know.

 

[oatnet]

Do they have Full tabs, or shortened tabs?

-JD

 

[yopappamon]

http://www.a123systems.com/products-cells-prismatic-pouch-cell.htm

Do you have dimensions? Possibly interested.

 

[Zeropointbug]

They are on sale for $50/cell right now at A123rc.com

 

[SlyCayer]

Do they have Full tabs, or shortened tabs?

-JD

They have full tabs.

 

[SlyCayer]

http://www.a123systems.com/products-cells-prismatic-pouch-cell.htm

Do you have dimensions? Possibly interested.

I will get back to you on this one, I forgot them at work today(showing the samples off to co-workers).

 

[SlyCayer]

They are on sale for $50/cell right now at A123rc.com

Hmmm, sounds like a salesmen directly coming from A123RC.com

I don't think those are A grade cells.

50.00$/15Ah = 3.3$ per Ah
58.00$~/20Ah = 2.9$ per Ah

Please correct me if my calculations are wrong.

 

[Zeropointbug]

I'm not sure I know what you mean? A grade cells?

http://www.a123rc.com/goods-468-Excitingly+Powerful+A+123+PRISMATIC+CELLS.html

Where are you buying them?

 

[PowerStranger]

I am also interested in the detailed technical drawing and tab materials of the A123 20Ah cells from this place. Any ideas?

Need to make a 4kWh battery pack..

 

[andla]

Why doesn't anyone give info about the voltage?
A*V=W

 

[oatnet]

Why doesn't anyone give info about the voltage?
A*V=W

Since all LifePO4 cells charge to 3.65v, the voltage is a given property, no need to talk about it. Thundersky is the only exception I know about, charging to 4.2v IIRC.

Besides, voltage is a rather dynamic property. After the fluff is burned off, the resting voltage is lower than the 3.65v peak charge voltage. The voltage drops under varying load, and drops during discharge. The nominal voltage for LiFe is 3.0v/cell. Some manufacturers refer to their cells at 3.0v or 3.3v.

 

[MitchJi]

Hi,

They are on sale for $50/cell right now at A123rc.com

I don't think those are A grade cells.

50.00$/15Ah = 3.3$ per Ah
58.00$~/20Ah = 2.9$ per Ah

Please correct me if my calculations are wrong.

http://www.a123rc.com/goods-468-Excitingly+Powerful+A+123+20ah+PRISMATIC+CELLS.html###

Promotion price:$50.99 End time: 20

* Processing Time:3 Days
* Ship to: USA

Courier 				Shipping Time 	Shipping Cost 	Total Cost 	Total Time
Expedited 				2-7 Days 		$31.20 			$82.19 		5-10 Days
Free Shipping 			3-7 Days 		$0.00 			$50.99 		6-10 Days
Ship With Tracking Num 	Days 			$1.50 			$52.49 		3-3 Days

Promotional price is $50.99 with free or nominal (w/tracking number) shipping. Pictures look like short tabs, not sure how reliable a123rc.com is (or slycayer either for that matter).

 

[SlyCayer]

Believe or not, the ones I ordered has samples are testing between 18.9 Ah to 19.3Ah on a 20Ah constant load. Charged to 3.6V.

 

[Doctorbass]

Believe or not, the ones I ordered has samples are testing between 18.9 Ah to 19.3Ah on a 20Ah constant load. Charged to 3.6V.

I guess these are B grade ( higher internal resistance) making higher thermal loss...

Doc

 

[SlyCayer]

I guess these are B grade ( higher internal resistance) making higher thermal loss...Doc

Huh, no, more like the A grade cells...

I got the B samples and they all tested out at 13~ Ah.

Are the A cells supposed to be more then 20Ah when they are rated at 20Ah?

 

[voicecoils]

I guess these are B grade ( higher internal resistance) making higher thermal loss...Doc

Huh, no, more like the A grade cells...

I got the B samples and they all tested out at 13~ Ah.

Are the A cells supposed to be more then 20Ah when they are rated at 20Ah?

Yup, current new cells are delivering just over 20Ah on average.

 

[Doctorbass]

I guess these are B grade ( higher internal resistance) making higher thermal loss...Doc

Huh, no, more like the A grade cells...

I got the B samples and they all tested out at 13~ Ah.

Are the A cells supposed to be more then 20Ah when they are rated at 20Ah?

Yup, current new cells are delivering just over 20Ah on average.

So i guess they are AB cells... :lol:

 

[SamTexas]

Yup, current new cells are delivering just over 20Ah on average.

At what discharge rate? 20A, 40A, 60A or what?

 

[SlyCayer]

At what discharge rate? 20A, 40A, 60A or what?

The ones I tested we're tested at 40A Constant Draw, they tested at 19.3Ah. Which I am very happy with that.

 

[voicecoils]

At what discharge rate? 20A, 40A, 60A or what?

1C

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