A123 20Ah Quebec Group buy(Canada) cells ARRIVED 24.57$/cell

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Re: A123 20Ah Quebec Group buy(Canada) cells ARRIVED 24.57$/

Postby pgt400 » Tue Apr 17, 2012 12:24 pm

davec wrote:pgt - zoppa bought from victpower
here is the source http://randomev.wordpress.com/
the quality of the cells vary and keep in mind not all of us have the tools to check them
again come back and post results if you get more than 6 months than we'll talk- i'm not impressed with what i see so far. 20ah cells pushing out only 18ah down to lvc choke point
i will post a graph on this thread once i hear back from Mavi so we can compare.
please stand by- justin at mavi is swamped with work but he did promise to do a 1c test for me.


No need to get an "unbiased, cough" graph from Mavizan....right from their own website they spec 18.5 - 19.6ah @2.0v lvc nominal capacity at 1C right? I have over 80 plots of my own that meet this! Does this mean I have grade "A" ? maybe, but I DO have same as Mavizan. I also have dozens of plots of new Headway 10ah cells that barely make over 9ah @ 1C.....in the battery world specs tend to run almost as loose as range quotes by electric vehical owners! I have no idea why the cells are as cheap as they are....but I HAVE SEEN for myself what remarkable perfomers they are!

PS Lets keep this thread about the Victpower A123's......as NO ONE here is going to pay $80-100 for Mavizans.
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Re: A123 20Ah Quebec Group buy(Canada) cells ARRIVED 24.57$/

Postby The Mighty Volt » Wed Apr 18, 2012 3:59 pm

Nobody cares about losing 1Ah of capacity. For the money being asked I am happy with that 1Ah being lost.

What I AM worried about is this soft-short.

The soft-short is what has many people holding their money to their chest and waiting.
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Re: A123 20Ah Quebec Group buy(Canada) cells ARRIVED 24.57$/

Postby deVries » Thu Apr 19, 2012 12:00 am

Doc, as usual, for years YOU have posted awesome data & ideas *with* actual completed projects showing your ideas work and are excellent! 8) Thank you again & again & again... :mrgreen: :D

Someone posted a battery build using these same cells here:

A123 AMP20 Battery Pack Build...

My question about this battery build, which is related to this thread in the sense we have to build a battery from these cells, is what are A123 specs about putting uniform pressure & contact against the full surface of the end cap cells?

As I wrote in that thread:
My only concern or question is are the pouches supposed to be under full surface compression or support on the outside/outer pack "ends"? Maybe use foam perhaps between the Polycarb & outside pouches? There must be some A123 specification for packaging the pouches under x-compression, since we always hear about the pouch puffing issue being a bad thing? :idea: :?: :?: :?: ...Just throwing this out there in case I'm misunderstanding something about this perceived issue. :shock:

Does anyone know the specs A123 provides to prevent pouch puffing related to "battery packaging" of the cells?
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Re: A123 20Ah Quebec Group buy(Canada) cells ARRIVED 24.57$/

Postby pgt400 » Thu Apr 19, 2012 9:18 am

I see Jack R has a prebuilt 28S3P pack coming in from China. Did anyone see in his video he had a nice little clamp with a terminal post? Would make it very easy to assemble P packs.
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Re: A123 20Ah Quebec Group buy(Canada) cells ARRIVED 24.57$/

Postby ohzee » Thu Apr 19, 2012 9:23 am

pgt400 wrote:I see Jack R has a prebuilt 28S3P pack coming in from China. Did anyone see in his video he had a nice little clamp with a terminal post? Would make it very easy to assemble P packs.


he say how much that cost ?
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Re: A123 20Ah Quebec Group buy(Canada) cells ARRIVED 24.57$/

Postby Doctorbass » Thu Apr 19, 2012 9:41 am

Victpower are offering assembled A123 20Ah pack from EV industry too!

The seem to be the same one from the Chevy Volt !!

I know Jack Richard said he ordered one and shouldf get it soon and will review it.

Steveo might also be interested by those for one of his project:

____________________________________________________
Dear:Steveo
Here still has some other A123 modules ,
they are 7S3P 42S3P 1S1P 6S13PPls download as a attached
Price :42.8$ for 1s1p
Price :283.3$ for 7S3P
Price :1600.0$ for 42s3p
Price :1052.3$ for 6S13P

Best Regardsxin wang
Shenzhen Victpower Technology Co., Ltd.
T: 086 0755 89635916 | F: 086 0755 89635636 | M: 15810120194E: victpowersales@victpower.cn
W:http://www.victpower.cn


But maybe those pack are not the same quality and could be reject but we dont know.. let's see what results Jack will get...


http://www.victpower.cn/product/552766502-210447990/_42s3p_A123_Scalable_Prismatic_Module.html
Image

http://www.victpower.cn/product/552771685-210447990/A123_Scalable_Prismatic_Module_7s3p_.html
Image

http://www.victpower.cn/product/552778615-210447990/_6s13p_A123_Scalable_Prismatic_Module.html
Image



That look interesting sicne they already have the connections.. and i wonder if they woudl sell just the case and connectinos without the cells to let us arrange they the way we want with some little mods..




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Re: A123 20Ah Quebec Group buy(Canada) cells ARRIVED 24.57$/

Postby deVries » Thu Apr 19, 2012 10:22 am

Doctorbass wrote:Price :283.3$ for 7S3P

Great find Doc! :!: :shock: :D

These are an even better price than bare cells!!! :!: :twisted:

Someone needs to sample these & then we can do a group buy of the minimum 100 order UNLESS they will sell in lower quantities.

I'll have battery $$$$ money next month in May, so I'm game for getting in on this deal. It's my belief these cells would be top quality, since these cells are already in modules as a basic building block for the final battery assembly & connections. It's very doubtful these would have any defects, imo. 8) These are probably surplus stock, because demand never materialized as expected & orders were canceled, imo. :wink:

Someone who already knows their contact should ask for the weight & dimensions of these 7s3p modules. Please! :idea: :mrgreen:

EDIT: I'm sooo excited about this module that I started a thread about whether we should do a group buy of these here... click link below...

Group Buy? Dr.Bass Steveo found 7s3p Module! Awesome Price!!

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Re: A123 20Ah Quebec Group buy(Canada) cells ARRIVED 24.57$/

Postby The Mighty Volt » Thu Apr 19, 2012 1:19 pm

I just got an email from a Chinese supplier offering me B Grade A123. Thats the first time a supplier has every expressly and explicitly referred to the product as B-Grade and offered it accordingly.
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Re: A123 20Ah Quebec Group buy(Canada) cells ARRIVED 24.57$/

Postby deVries » Thu Apr 19, 2012 1:52 pm

The Mighty Volt wrote:I just got an email from a Chinese supplier offering me B Grade A123. Thats the first time a supplier has every expressly and explicitly referred to the product as B-Grade and offered it accordingly.

A fantastic opportunity to ask this supplier what is "their definition" of B-Grade. Is it A123's definition too? :idea: :?:

All I seemed to have learned so far is that B-Grade is just the semantics of not being under contract with A123 directly, which that just means to me that resellers are getting the "A-Grade" from an A123 contract as surplus, cancelled orders, etc. So far, "B-Grade" seems to be "A-Grade" at least by the tolerance specifications given for an A123 battery. It does not mean lower quality or defect from what I've read so far...

Anyone know if I'm mistaken? :?: Please correct me now! :D
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Re: A123 20Ah Quebec Group buy(Canada) cells ARRIVED 24.57$/

Postby Ypedal » Thu Apr 19, 2012 2:50 pm

Just because a statement cannot be proven false, does not make it true.
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Re: A123 20Ah Quebec Group buy(Canada) cells ARRIVED 24.57$/

Postby The Mighty Volt » Thu Apr 19, 2012 3:20 pm

Ypedal wrote:Just because a statement cannot be proven false, does not make it true.


Agreed.

The truth of the matter is that nobody knows what the story is. Not yet.


We are in the dark. Or in the grey. :lol: What we are relying on is tests. Thats why I ordered my own CBA III so I can start to order, test, and post results.

Its up to everyone to try to get a cell and test it and post their results. Then we can cross-reference and come up with some accurate conclusions.

Not definite conclusions. Just accurate ones.

This entire A123 thing is so typical of the United States- brilliant academic and engineering minds, zero business integrity.
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Re: A123 20Ah Quebec Group buy(Canada) cells ARRIVED 24.57$/

Postby miro13car » Thu Apr 19, 2012 3:26 pm

Thread suppose to be about Victpower cells
You see don't dare to write about anything else HA HA
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Re: A123 20Ah Quebec Group buy(Canada) cells ARRIVED 24.57$/

Postby The Mighty Volt » Thu Apr 19, 2012 3:33 pm

miro13car wrote:Thread suppose to be about Victpower cells
You see don't dare to write about anything else HA HA


I know- I got banned from a thread because I shouted at a Canadian. Image

Anyways.....I will mail you when I get my CBA III and do some tests.
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Re: A123 20Ah Quebec Group buy(Canada) cells ARRIVED 24.57$/

Postby miro13car » Thu Apr 19, 2012 4:22 pm

But seriously ,those 7S 3P packs are so tempting to check them out
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Re: A123 20Ah Quebec Group buy(Canada) cells ARRIVED 24.57$/

Postby Doctorbass » Thu Apr 19, 2012 6:52 pm

miro13car wrote:But seriously ,those 7S 3P packs are so tempting to check them out



Yeah these are the perfect pack fo rthe zero motorcycle 2011 boostpack!!

from 58V to 84V in a blink of an eye!
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Re: A123 20Ah Quebec Group buy(Canada) cells ARRIVED 24.57$/

Postby davec » Thu Apr 19, 2012 9:44 pm

this is getting interesting indeed
i can accept the fact that some of the loose cells are factory rejects
but these assembled packs are a different story and the price is definitely right
makes me wonder where their getting all this stuff from- regardless hopefully there's some good cells in these things
can't waite to see the test results
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Re: A123 20Ah Quebec Group buy(Canada) cells ARRIVED 24.57$/

Postby deVries » Thu Apr 19, 2012 10:49 pm

The Mighty Volt wrote:
Ypedal wrote:Just because a statement cannot be proven false, does not make it true.


Agreed.

The truth of the matter is that nobody knows what the story is. Not yet.


We are in the dark. Or in the grey. :lol: What we are relying on is tests. Thats why I ordered my own CBA III so I can start to order, test, and post results.

Its up to everyone to try to get a cell and test it and post their results. Then we can cross-reference and come up with some accurate conclusions.

Not definite conclusions. Just accurate ones.

This entire A123 thing is so typical of the United States- brilliant academic and engineering minds, zero business integrity.

I agree with both of you too. I was only offering what I learned so far only offering pure speculation & opinion & wishful thinking & also going by Doctorbass' posts of test results of finding no defective cells out of 180 cells! :mrgreen:

Now, we can move beyond some speculation with some news I found & posted in the 7s3p A123 module thread I started...

Here is what I found:

bigmoose wrote:BTW, this is opinion, my opinion... I think these modules hitting the grey market shows the desperate financial state of A123. First they dumped loose cells, now they are dumping the modules. All off shore and in China, so (again IMHO) they are free of all legal obligations to ensure these are only sold to "qualified" individuals by US law.

I also think there is some mix of quality in the cells. If I had to guess I would think the cells sold months ago with cut tabs might be the poorest. They were dumped first (perhaps) and neutered by a company that was more healthy. Then they dumped production stockpiles that were aging. These cells may not have had all the QA done on them. So they may have undetected problems. Now I would bet that cells that made it into modules are darn good cells.

Just to follow-up further with what your interesting speculation is (see above) I found out from a news release what was the cause of the defect:

"The cause of the defects described today was faulty calibration of one of four welding machines in the Michigan plant that caused misalignment of a component in some cells, Vieau (he is the President of AONE) said today. The flaw could cause an electrical short, which could result in premature failure of the battery or decrease performance and reduce battery life, he said."

This probably means, IMO, imo, :P that there will be a small percentage of these cells we are getting that WILL HAVE this defect. Using the NASA test =or= whatever Doctorbass suggests we do for each cell, then we should be able to weed these out. I'm getting greedy now! :!: :mrgreen:

IF, yes, IF, we can harvest the good cells out of any defective module or good 7s3p, THEN we should get SUPER PRICING for these modules... AND, make good batteries by finding the 1%-10% that are defective, IMO, imo, :P of cells that are bad.

Here's the bottom line... A123 can not afford to find & replace the defective cells in the modules or batteries, so they are just going to dump all the gold & bits of coal en masse & be done with it. I think this is a golden opportunity to mine this gold... do I have "lithium fever" :?: :lol:

Btw, at least some of these modules were likely destined for an expensive e-vehicle: $107,000 Fisker Karma model. The company admitted this defect affected 5 customers & it's going to cost them 55 million to replace the bad production runs. I think these cells should be high quality except for the ones effected by the faulty laser alignment, imo, IMO. :mrgreen:

Either way, about 55 million in "surplus" product will be sold off to those willing to mine the lithium gold. 8)

This is the link to the beginning of that thread: Group Buy? Dr.Bass Steveo found 7s3p Module! Awesome Price!!
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Re: A123 20Ah Quebec Group buy(Canada) cells ARRIVED 24.57$/

Postby Doctorbass » Thu Apr 19, 2012 11:28 pm

Chip Yates the world record holder for the fastest electric motorcycle is going to use the A123 cells 20Ah for his next project:

An AIRPLANE !!

These seem really similar and their package too than the one we are geting here!

These A123 and an airplane!

you can see them couples of time in that video

also on twitter: http://twitter.com/#!/chipyates89/status/179261456322269184/photo/1




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Re: A123 20Ah Quebec Group buy(Canada) cells ARRIVED 24.57$/

Postby deVries » Fri Apr 20, 2012 4:45 pm

Doctorbass wrote:Here is what i think:
These cells was tested and tested and tested.. They are probably one of the most tested LifePo4 cells by independent tester, RC user and company … the Chevy Volt builder also have choosed them. Well.. the LiFePo4 nano chemistry that A123 developed is the lifepo4 best chemistry ever made.
Doc

Hi Doc, I know you bought some Nano LiPo a year+ or more ago from Hobby King. :D

How would you compare that HK LiPo nano chemistry to A123?

Also, what about the manufacture process of the cells? Is the manufacture or packaging of the A123 cells better than the way the Hobby King Nano LiPo is packaged or manufactured in your opinion. You have tested and used both chemistry types for more than a year now...

Your opinions from testing & experience are good enough information for me... after all, you have tested sooo many different cells & batteries & chemistry types that I think you offer an informed opinion, at least. :twisted: 8)

Thank you! Sir Battman! :mrgreen:
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Re: A123 20Ah Quebec Group buy(Canada) cells ARRIVED 24.57$/

Postby agniusm » Fri Apr 20, 2012 5:08 pm

I was looking at the photos of the module. My thinking is that it has Korean cells in it. Note on the module test sticker: date 25.04.2011, tests passed, POS MBB, w/LOB but not NEG MBB and w/LOB of that. Don't know what that means. Now i assume that cells in the module will be marked as A2, cells i have with A2 marking all delivered around 19.3-19.8AH. Bad cells i have received were Korean marking. They all were at 0.00 volts, dead. I have to check serial number of the and that is represented i guess by PSD?V?O. I cant make out other numbers and i cant read the qr code ether. Room for thoughts
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Re: A123 20Ah Quebec Group buy(Canada) cells ARRIVED 24.57$/

Postby deVries » Fri Apr 20, 2012 5:25 pm

agniusm wrote:I was looking at the photos of the module. My thinking is that it has Korean cells in it. Note on the module test sticker: date 25.04.2011, tests passed, POS MBB, w/LOB but not NEG MBB and w/LOB of that. Don't know what that means. Now i assume that cells in the module will be marked as A2, cells i have with A2 marking all delivered around 19.3-19.8AH. Bad cells i have received were Korean marking. They all were at 0.00 volts, dead. I have to check serial number of the and that is represented i guess by PSD?V?O. I cant make out other numbers and i cant read the qr code ether. Room for thoughts
Cheers

Thanks for the information. :mrgreen:

What company did you buy the Dead Cells from? :?:

Were the Dead Cells sold in a module of many cells or sold individually & sent as a single cell? :?:

What percentage of Dead Cells did you receive vs good cells? :?:

Did you get an exchange warranty for Dead Cells for DOA? :?: :idea:

I wonder which A123 customer is assembling e-vehicles in Korea? :?:

(The defective cells were all made in the USA.)

Thanks! "Agniusm" 8)
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Re: A123 20Ah Quebec Group buy(Canada) cells ARRIVED 24.57$/

Postby agniusm » Fri Apr 20, 2012 5:32 pm

deVries wrote:
agniusm wrote:I was looking at the photos of the module. My thinking is that it has Korean cells in it. Note on the module test sticker: date 25.04.2011, tests passed, POS MBB, w/LOB but not NEG MBB and w/LOB of that. Don't know what that means. Now i assume that cells in the module will be marked as A2, cells i have with A2 marking all delivered around 19.3-19.8AH. Bad cells i have received were Korean marking. They all were at 0.00 volts, dead. I have to check serial number of the and that is represented i guess by PSD?V?O. I cant make out other numbers and i cant read the qr code ether. Room for thoughts
Cheers

Thanks for the information. :mrgreen:

What company did you buy the Dead Cells from? :?:

Were the Dead Cells sold in a module of many cells or sold individually & sent as a single cell? :?:

Did you get an exchange warranty for Dead Cells for DOA? :?: :idea:

I wonder which A123 customer is assembling e-vehicles in Korea? :?:

(The defective cells were all made in the USA.)

Thanks! "Agniusm" 8)

There is whole thread on the issue. This is why i post this, the cells were from same victpower(Read here: http://endless-sphere.com/forums/viewtopic.php?f=14&t=33939)
All matters were solved.
I bought 24 cells, 6 of them were USA made and all good, 18 cells made in Korea and all dead. I read somebody received Korean cells all pushing out 18+Ah, less than 19 thou, could be factory/line fault?

EDIT: The serial number was starting TOJXXXXXXXXX, so it is not from bad bulk that i got :)
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Re: A123 20Ah Quebec Group buy(Canada) cells ARRIVED 24.57$/

Postby Doctorbass » Fri Apr 20, 2012 10:45 pm

deVries wrote:
Doctorbass wrote:Here is what i think:
These cells was tested and tested and tested.. They are probably one of the most tested LifePo4 cells by independent tester, RC user and company … the Chevy Volt builder also have choosed them. Well.. the LiFePo4 nano chemistry that A123 developed is the lifepo4 best chemistry ever made.
Doc

Hi Doc, I know you bought some Nano LiPo a year+ or more ago from Hobby King. :D

How would you compare that HK LiPo nano chemistry to A123?

Also, what about the manufacture process of the cells? Is the manufacture or packaging of the A123 cells better than the way the Hobby King Nano LiPo is packaged or manufactured in your opinion. You have tested and used both chemistry types for more than a year now...

Your opinions from testing & experience are good enough information for me... after all, you have tested sooo many different cells & batteries & chemistry types that I think you offer an informed opinion, at least. :twisted: 8)

Thank you! Sir Battman! :mrgreen:


Hmm.. Well the lipo i have and the only lipo i ordered from now are the turnigy 30C and the zippy 20C pack. I never havd the nanotech from now, but i know they are more powerfull as well.

As well the manufacture process of the A123 is way better than the lipo !

you will never see any commercial A123 EV battery that are built in a shrink tube or using JST connectors or.. 12 gauge wires that are described to support 100Acontinuous and 150A burst... or like the nanotech, some 10 or 8 gauge wire that could support 450A :lol:

RC battery are not made to endure the same conditions and to pass the same test level than any commercial A123!.

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Re: A123 20Ah Quebec Group buy(Canada) cells ARRIVED 24.57$/

Postby davec » Wed May 02, 2012 10:17 am

1c results from Mavi

so we have it- the vict cells sag under 3volts at 15-16AH based on Doc bass chart- and the legitimate mavi cells are down to 3volts at 18ah
19.79ah down to 2volt LVC

vict cells do not meet the specs- zoppa hit the nail on the head - their cells are truly 16ah- the shortcomings are obvious- why are they not meeting the full specs? used/recycled/manufacture defects? no idea.
hence the reason we are getting them so cheap.

EDIT- i am not convinced- you can claim 18-19 but if you look at the chart and how well it holds the voltage it's clear the mavi are superior and meet the specs - a) it still has not been proven how many cycles can be had from these. and what is wrong with these. b) and if you go back those docbass charts- Okay out of 3 cells he had 1 strong cell that might have reached 16.6-17ah and than sagged under 3 volts the majority of the cells cut off at 15-16... same with the other tests i have seen from zoppa/ everyone else. once down your in the 2v territory you basically out low on juice.

the cells do not meet the a123 quality specs.


case closed.

i can get 10c-20c if anyone cares for the results- or any other C


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Last edited by davec on Wed May 02, 2012 12:12 pm, edited 3 times in total.
davec
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Re: A123 20Ah Quebec Group buy(Canada) cells ARRIVED 24.57$/

Postby pgt400 » Wed May 02, 2012 11:11 am

davec wrote:1c results from Mavi

so we have it- the vict cells sag under 3volts at 15-16AH based on Doc bass chart- and the legitimate mavi cells are down to 3volts at 18ah
19.79ah down to 2volt LVC

vict cells do not meet the specs- zoppa hit the nail on the head - their cells are truly 16ah- the shortcomings are obvious- why are they not meeting the full specs? used/recycled/manufacture defects? no idea.
hence the reason we are getting them so cheap.

case closed.


a123.jpg


Not at all! Mavi's spec is "Nominal Capacity: 18.5Ah min, 19.6ah nom" down to 2v right from their website and plot....All that graph proves is that they just sent you the VERY best plot they had!...actually above their spec @19.7 Doc's cells and mine all vary by about 1 ah. Look at Docs cell #47 very close to 18ah at 3v. They are definately new non recycled cycles....are they A or B grade? Can't tell, what you have proven though is that they MEET Mavis spec. Thanks you! Anyway, who cares about 1AH at this price? These cells are hot due to their low internal resistance, low weight. Suggest you buy 50 Mavi cells and test them....you can bet they will not all be the same as this one!
03' Ninja EX250, Agni #95 reinforced, 25S1P 40ah CALB Lifepo4, Mini-BMS.
05' Mongoose 20" BMX, Golden Hub Motor, 48 volts @ 9ah, A123's, Signalab BMS.
http://www.evalbum.com/1955
http://www.evalbum.com/3337
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