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

[JRP3]

i'm not sure if its been mentioned but on taobao you can find the empty a123 battery boxes ( 48v or 60v) dirt cheap,
they probably dont have any welding tabs but the boxes maybe very handy.

Can't find them, do you have a link?

[Sutho]

i'm not sure if its been mentioned but on taobao you can find the empty a123 battery boxes ( 48v or 60v) dirt cheap,
they probably dont have any welding tabs but the boxes maybe very handy.

Are you sure they are empty boxes? They look like complete modules to me. Got the compression straps, busbars, etc.

At about 5 bucks each yep they are empty. Note I never really trust the photos on that site.

Why is all the text on the taobaoenglish.com site in Chinese.....and unable to be translated?

[totinen]

i'm not sure if its been mentioned but on taobao you can find the empty a123 battery boxes ( 48v or 60v) dirt cheap,
they probably dont have any welding tabs but the boxes maybe very handy.

Can't find them, do you have a link?

Here:
http://item.taobao.com/item.htm?id=17683140670

They are whole batteries(?), but on hire. I translated with Google Translate.

[999zip999]

Totinen that's a great find. I would like 2-36v's and would hope they come with the tray under the buss bar for tap seperation ? Hope we can crack the chiniesse codes.

[JRP3]

There is an English version but I don't know if it's the same http://www.englishtaobao.com/

[whatever]

yes that was the link, I just assumed they were empty boxes, there was another one but probably same advertiser
my mistake

[totinen]

There is an English version but I don't know if it's the same http://www.englishtaobao.com/

See this:
http://www.englishtaobao.com/taobao?Sea ... atId=0&p=1

[MN Driver]

Interesting stuff at that Taobao site.

Looks like they are trying to add tabs back on to cut-tab cells. Looks a little corroded, won't pass current too well with corrosion.
http://www.englishtaobao.com/Product/15 ... E/#tab-pdt

Looking at this link: http://www.englishtaobao.com/Product/15 ... C+span%3E/
Does it look like that is what we'd be left with if we removed the cells out of these 7s3p or 28s3p modules?

Edit: What I like about this Taobao site is that they actually have a feedback section. Something we don't have with Alibaba, I think it's a nice additional element as it could mean that we could get a better idea of whether or not we are getting something good, and if not we can post that we didn't.

[heathyoung]

Well the least they could have done is made both tabs copper so they could be soldered - bastards.

[mjcrow]

This is an interesting Taobao sale, the units look like they are put together but no bus bars welded yet http://www.englishtaobao.com/product/14829449243/%3Cspan+class%3DH%3EA%3C+span%3E+%3CSpan+class%3DH%3E123+%3C+span%3E+3.3v20%3Cspan+class%3DH%3Ea+lithium+iron+phosphate+battery+%3C+span%3E+h

[Sutho]

This is an interesting Taobao sale, the units look like they are put together but no bus bars welded yet http://www.englishtaobao.com/product/14829449243/%3Cspan+class%3DH%3EA%3C+span%3E+%3CSpan+class%3DH%3E123+%3C+span%3E+3.3v20%3Cspan+class%3DH%3Ea+lithium+iron+phosphate+battery+%3C+span%3E+h

Yes.....I seen that today and thought exactly the same thing. It would appear that these are modules abandoned by A123 part way through the production process?

Good that they are already packaged and compressed......bad that there are not too many options for joining the tabs.

[bigmoose]

This is an interesting Taobao sale, the units look like they are put together but no bus bars welded yet http://www.englishtaobao.com/product/14829449243/%3Cspan+class%3DH%3EA%3C+span%3E+%3CSpan+class%3DH%3E123+%3C+span%3E+3.3v20%3Cspan+class%3DH%3Ea+lithium+iron+phosphate+battery+%3C+span%3E+h

This one appears to show 21 cells in an unfinished carrier for $18, now that appears to be the deal of the century!

[JRP3]

Looks as if some of the tabs have many small holes punched in them. Wonder what that's all about?

[Sutho]

This one appears to show 21 cells in an unfinished carrier for $18, now that appears to be the deal of the century!

I reckon they would be charging $18 per cell....but let us know if you hear any different.

[rolf_w]

The A123 pcb white BMS connector is JST part number S22B-AIT2G-2FS

the above connector but S10B-AIT2G-1AK with 10pins seems to be the CAN bus connector on the 7s3p BMS. Does anybody no what type the grey balancer connector is (also JST 18 pin male)

A123_BMS_connectors.jpg (124.35 KiB) Viewed 290 times

r

[MN Driver]

Looks as if some of the tabs have many small holes punched in them. Wonder what that's all about?

I had my China buddy work out the words left by the seller.
He first said that the seller has no feedback and to be careful.

He says that it describes the negative electrode holes as being a short circuit protection in order to protect the batteries.
He said that there is some information about no returns out of state, he thinks they mean Beijing. Sounds like they don't want to deal with shipping. It goes into a little bit of depth to be careful and understand lithium and suggests getting protection as it doesn't come with it(BMS). For extra money they are willing to rip it apart to ship these cells loose. He says the batteries are soft because they haven't gone through a factory activation charge, so I assume that means they are assembled and then charged and tested(seems weird to me) and they get hard with activation(that's what she said)?

The issue that he told me to be concerned about is that Taobao is mostly an internal China site. They are likely not going to be able to speak English to you and depending on the seller, they might not be willing to ship outside China. Unless you can find someone who is fluent in Chinese, Taobao might be tough.

If this all worked out, I'd take 5 of those because I could use 100 cells.

[totinen]

Maybe soft pouches are brand new, hardened pouches are heavily used?

[mjcrow]

The issue that he told me to be concerned about is that Taobao is mostly an internal China site. They are likely not going to be able to speak English to you and depending on the seller, they might not be willing to ship outside China. Unless you can find someone who is fluent in Chinese, Taobao might be tough.

If this all worked out, I'd take 5 of those because I could use 100 cells.

If you want to buy from Taobao you need to use an agent, there are plenty out there, they usually charge around 8% of cost +shipping+insurance. The item is shipped to the agent (located in China) who then checks the item, repackages it if required and forwards it on to you. I bought my A123s (cut off tabs) off Taobao, I tried about 5 different agents until I found one who would ship batteries (http://www.taobaotrends.com/), overall a good experience with these guys.

Michael

[MrJoshua]

Does anyone have a contact in China who can get this modules in the same place Victpower gets them? I am sure people would be willing to pay more for a module that tests good before shipping.

[JRP3]

He says the batteries are soft because they haven't gone through a factory activation charge, so I assume that means they are assembled and then charged and tested(seems weird to me) and they get hard with activation(that's what she said)?

I would be surprised if the cells weren't charged first as a test before being welded into a pack, seems like that would be the time to catch a problem. Of course A123 missed a bunch of problems, so who knows, but I doubt they would assemble untested cells that had never been charged with a forming charge.

[999zip999]

Their are not going to sell you the one that burn down the Volt. That's priceless.

[MN Driver]

Their are not going to sell you the one that burn down the Volt. That's priceless.

Uhh, A123 never burned down a Volt, ever. That would be misinformation, which has already been corrected, except for the one quote of someone that was removed that contained a video of the Volt which had user added text that was false information.

It's similar to the misinformation about these cells having 20Ah, they don't and if you bank on the capacity of your pack having 20Ah, you might end up a little sore for range.

[999zip999]

Thanks

[whatever]

i'm not quite sure what this is guy is selling but it might be the boards to join the cells together
http://www.englishtaobao.com/Product/17778284517/Mail+and+throw+out+the+package-%3Cspan+class%3DH%3EA+%3C+span%3E+%3Cspan+class%3DH%3E123+%3C+span%3E+electric+car+battery+60V%3Cspan+class%3DH%3E20+%3C+span%3E+%3Cspan+class%3DH%3EAH+%3C+span%3E/

[999zip999]

That's a good fine. I think two 12s is a better fit for my bike as the size of that is a box. The size of these cells make a challenge to fit on a bike.