TESLA BATTERY modules availlable soon !

[Doctorbass]

Hi guys i know this type of title for a post will catch attention alot 8)

no worrie i was talking about TESLA as well :wink:

There is a guys on youtube making vide for his E-samba project... you might know him already on teh forum.

He got some TESLA modules !! YES !!

and will probably get some more...

watch his lastest video where you will also see some interesting details about the Tesla battery pack construction!

[youtube]lZzoxRCxZ_8[/youtube]


Doc

 

[Hillhater]

I'm sure it is a Tesla pack, but I'm also sure it's not from a Roadster or a Mod S.
330v, 18kWhr, 1980 cells , in 6 modules ?
So what vehicle are these from ? ..Toyota Rav EV ?
...don't think so as they were reported to be 386v , 42kWhr, with , 4500 cells. .?

 

[Doctorbass]

I'm sure it is a Tesla pack, but I'm also sure it's not from a Roadster or a Mod S.
330v, 18kWhr, 1980 cells , in 6 modules ?
So what vehicle are these from ? ..Toyota Rav EV ?

It's a 6 x 3kWh ish module so it's 18 kWh.

I also bet it's from a Rav4.

here is the Rav4 battery:

and also same exact as the Mercedes A-Class E:

Doc

 

[Hillhater]

Ahh ! OK, so those vehicles had 2 packs each !...that would make sense, I guess one report or the other got the cell count wrong.
386 volts would just be rating the cells at 4.2 volts.

 

[Hillhater]

Watched it again.
Could be useful for a larger vehicle, but I am struggling to see how we could reuse these modules for Ebikes.
The module size , weight , and capacity... 55v, 52 Ahr,... Is non ideal for most bikes and It looks near impossible to break the modules down to smaller packages , without destroying most everything except the cells, let alone reconfigure for more optimum voltage or Ahr capacity ??
...but I guess they would sit nicely in the back of a pick up truck !
It will be interesting to see what price these become available for.
They will have to be cheap to compete with the Leaf modules which also seem to be freely available now..
http://hybridautocenter.com/HAC4/index.php?option=com_hikashop&ctrl=category&task=listing&cid=14&name=lithium-batteries-and-packs&Itemid=605

 

[Gab]

cool video they are 18650 inside

 

[circuit]

Anyone has his email? Tried to contact via youtube, but no luck.

If anyone gets their hands on these, I would be interested in receiving one of those BMS modules...

 

[Ugrd]

I wish someone would buy a crashed Tesla and then sell all the 18650 cells/bms to us for cheap

 

[silviasol]

Anyone has his email? Tried to contact via youtube, but no luck.

If anyone gets their hands on these, I would be interested in receiving one of those BMS modules...

Yes I want a pack! What is his account on here?

 

[Punx0r]

Athe BMSs any use? I'd kinda expect it's all proprietary interfaces, or at least some automotive protocol like CANBUS.

 

[MitchJi]

Anyone has his email? ...

Hi,

jehuagarcia@gmail.com

I got that by clicking donate on his home page. That brings up the PayPal page that shows his email address.

http://www.electricsamba.com/

 

[MitchJi]

Hi,

Are the BMSs any use? I'd kinda expect it's all proprietary interfaces, or at least some automotive protocol like CANBUS.

Some questions:
1. When charging/discharging are the cell level HVC and LVC controlled by the BMS hardware or controlled by the CANBUS software?
2. How is the temperature control implemented and what happens if it gets too low or high?

 

[silviasol]

https://www.youtube.com/watch?v=F7IBVFdgjZA&list=UUcMfCkN1juSa49DJFYltOTw

 

[circuit]

Video was taken down. I wonder if he had a talk with tesla's lawyers or what...

 

[Hillhater]

You may find this dismantling of a Tesla 85kWhr pack interesting
http://www.teslamotorsclub.com/showthread.php/34934-Pics-Info-Inside-the-battery-pack
Looks like some nice useful 22.5v , 230 Ahr modules :wink:

 

[silviasol]

That or he gave up on the project. By now he should for sure have had the thing running and finished with the packs he had but no video's, maybe it is a big burnt up van now? lol. I plan on doing an electric car in the next few years and from my calculations you really can't benefit from 18650 pricewise, large lipo/lithium soft packs from china are way cheaper and only about 20% heavier/larger.

http://www.alibaba.com/product-detail/high-capacity-rechargeable-prismatic-20ah-3_1405348082.html

 

[Doctorbass]

You may find this dismantling of a Tesla 85kWhr pack interesting
http://www.teslamotorsclub.com/showthread.php/34934-Pics-Info-Inside-the-battery-pack
Looks like some nice useful 22.5v , 230 Ahr modules :wink:

Excellent find Hillhater !!!!

 

[Hillhater]

....from my calculations you really can't benefit from 18650 pricewise, large lipo/lithium soft packs from china are way cheaper and only about 20% heavier/larger.
http://www.alibaba.com/product-detail/high-capacity-rechargeable-prismatic-20ah-3_1405348082.html

I think you need to do your calculations again..
Based on that cell ( ?? quality ?) compared to a proven 3.4Ahr 18650, the 18650 has it beat by ~ +69% on Whr/kg,
and more than double the Whr/litre ! ......Cell only data.
Not to mention, those cells are only rated for 1C max discharge !
Price is another debate. those Lipos are specified for 500 cycles max ..(2 years use ?)
The 18650 's in Tesla's are now guaranteed for 8 years !
BUT.. it gets worse when you actually try to build a useable pack from these...
Say you want a 20kWhr pack of 200volts..just as an example .
The Lipos would need to be 50S , and 25P ( remember 1C max)
That gives you a pack of 1250 cells with a weight of 625 kg ( assuming 0.5 kg like similar 20 Ahr lipo pouches)
and a volume of 250 litres
The 18650's would be 50S, and 50P (3C max discharge)
Which would give a pack of 2500 cells weighing 125 kg and occupying a mere 57 litres of space
... so that lipo is 4 times as heavy and 4 times the volume !
Not knowing how much those pouches would cost ..say $10 each ? the lipo cost would be $12,500
The Pana 3.4Ahr 18650's can be bought for ~$6 each so they would cost $15,000
Slightly more initially, but remember they are going to last 4 times longer... at least !
Would anyone seriously consider that type of unbranded LiPo for a road going EV.

 

[MitchJi]

Hi,

Not knowing how much those pouches would cost ..say $10 each ? the lipo cost would be $12,500
The Pana 3.4Ahr 18650's can be bought for ~$6 each so they would cost $15,000
Slightly more initially, but remember they are going to last 4 times longer... at least !

The only smart way to buy batteries for large EV's is buying salvage OEM packs. So for 18650's (or 5AH 22700's ) you should plan on buying Tesla Packs.