I'm an idiot. Ignore module count. There are 2 - 1kWh banks, and 7 - 2 kWh banks.

 

Awesome!!!!!! Only 2k$
I admit that I'm jealous.
Supposed to have 96 modules of 3 cells.
I will follow this thread with interest!

 

It is a 96s3p pack, I have installed a BMS. I really like this pack. What I did, I used the casing of the original bms and made a board inside. Now I use the full 16kWh and the pack is still almost original. I also used the original bms connectors, very neat solution, I will post pictures soon.

 

I'd love to see a picture of a single cell.

Without X-Ray vision, I'm seeing 6 cell blades on the 1kWh modules, and 12 cell blades on the 2kWh modules.

I'm puzzled.

 

Edit: DOH!! 288 is correct.

 

I'm going to make up words for this battery:

Blade - One of the 1/2" thick plastic carriers for the cells.

Module - Either 1kWh or 2kWh with it's own BMS connector.

Block - Two or three Modules that have their own BMS computer on top.

 

So what is the total weight of the pack?

Two packs together at this price would give you a 32kwh pack for $4k. Not bad at all.

 

Advertised weight is 435lb for the entire assembly. I could not weigh it.

 

Was the shipping weight on the packing slip or invoice?

 

DOH!! Shipping weight with large pallet says 516lb on the bill of lading. So 435lb is probably right. It's a very heavy pallet.

 

Thanks. So a 32kwh pack would be right around 900 pounds.

 

Freight company weight.

 

http://www.gaccmidwest.org/fileadmi...ente/eMobility_Speaker_Bios/eMob_presentations/Matthe_GM_Battery_panel_Volt.pdf

Inside the pack I found 2 big relays and 3 smaller relays. New price about 200 USD each !

The wiring inside is too thin for my 1000A controller, I measured the Chevy volt on full acceleration at 330A peak.

 

That 330A out of a 45Ah battery is 7C discharge at the Volt level, and about 10C at the Cadillac discharge rate.

 

Wow! Thanks for the link. So it's a small pouch cell. Must be thin.

 

The Volt cells are very advanced chemistry, optimized for low weight at high discharge rate.

 

Watch out, your starting to sound like a Chevy salesman!

 

Here's some more data on it:

https://docs.google.com/file/d/0BwHvhEbCHHEleUp3TUMxOUwzdmM/edit

 

Are they no longer running >6 year old manganese spinel cathodes? I thought it used cells kinda on the low side of energy density and cycle life compared with NCA or NCM.

I did think LG's spiral wrapped ceramic separator was pretty cool, but I don't know if I could call the cells advanced chemistry anymore.

Regardless though, amazingly good deal for DIY EV building!!! Woot!! I've been tempted to buy one myself. Great job on pulling the trigger and getting one! Huge value/quality advantage over most all other DIY EV battery options. I just wish it wasn't in such a wonky T-shaped layout. Are you stuffing the cells into the Insight in the photo?

 

First I will steal 48vdc worth to finish the Trials Motorcycle.

Then, turn the Insight into a Volt.

 

Once I can weigh a single cell, we will know how advanced the Argonne battery is. It pumps 110kw without breaking a sweat. The Cadillac taps 150kw out of the same battery.

 

Here's why I think the GM battery is the current winner:

Volt 16.5 kWh = 149HP is 9HP per kWh
Cadillac 16.5 kWh = 207HP is 12.5 HP/kWh
Tesla S 60 kWh = 302HP is 5HP/kWh
Tesla S Performance 85 kWh = 416HP is 5HP/kWh
Leaf 24 kWh = 107HP is 4.5HP/kWh

The GM battery is set to deliver about twice the output per battery kWh as the other players.

To put it in perspective, if the Tesla S Performance ran the GM battery the same size, it would have the same range, but have a peak HP of 1040. This is Bugatti Veyron territory.

 

This is primarily due to the fact you are comparing EV batteries to HEV or PHEV batteries. The HEV (and PHEV) batteries are sized for smaller energy but similar power so are designed to use higher C-rate cells and often have more robust thermal management systems than the EV batteries.

EnerDel, which I am familiar with, produces two cells for automotive; a power cell and an energy cell. Here is a handy place to see the differences. http://evolveelectrics.com/Enerdel.html

 

Well whatever chem it uses was developed at Argonne:

http://www.anl.gov/articles/argonne-battery-technology-helps-power-chevy-volt

 

The Enerdel is rated at 5C discharge? That is about where Tesla is at?

DOH!! 15C for 10s. I know the GM battery will do 10C for over 16 seconds. Will it do 15C? Dunno.

But for hobbyist, the Enerdel is priced pretty steep. To get 16kWh, it costs $14,000. I can buy 2 complete wrecked Volts for less than that. Or if I can find that many, 7 batteries.

NOTE: The Volt can go 50mi on a charge, well 49mi. I proved it last month, as have many others. So I'm not sure it's not an EV. It has used <3 gallons of gas in 1500 miles so far. It's never been refueled since December.

 

The Enerdel is rated at 5C discharge? That is about where Tesla is at?

The power cell is the CP160 and rated at 5C continuous and 15C burst. These are manufacturer's rating which are typically very conservative. I imagine the actual cell capability is similar to the one used in the Volt. I know a fellow who used to work at Compact Power (now LG Chem) on the Volt battery development and have sat thru technical presentations by the company at SAE events. It is a very good product. But there are a number of other products on par with them.

Here is an interesting take on power capability of Lithium cells. Unfortunately, the LG Chem cell was unavailable for him to test at the time. http://elithion.com/wp_short_discharge_time.php

 

When I bought the volt pack 16kWh I had the charger and controller in my hands, at least I think it was. I also have seen the electric motor /gearbox. I can buy these parts for cheap. It is a salvage parts store. But to me these parts were too complicated. You probably need everything to get it working. And there were so many extra wires I could not address, also the electric motor was integrated in some kind of gearbox.

 

From my reading:

It has 2 electric motors. A big one for propulsion, and a little one for regen. Both can come on as traction motors by the use of clutches and planetaries.

 

Where are you finding these yards, online or keeping them a Secret? Lol

 

You can use car-part.com. I found a volt battery back near by for $1250

 

Hey McRat.... I was so amazed of your find.... I decided to take one too!
It was awesome! I saw your thread yesterday, I've decide to try to find something on local junkyard and I called, I paid, I took possession

Now, Lipo Louis, please share all the details and pics you have of your battery

 

To state the obvious, get yourself some 1000 volt gloves before working on it.

Remove all the 10mm head screws, including the ones on the front of the tunnel where the foam is.

The front is tight, so have two people lift the cover off. The cover is fiberglass.

There is positive and negative markers on each of the "blocks". Check voltages of each block.

 

Remove all the 10mm head screws... Check voltages of each block.

Well, since I wasn't interested to buy a 435 lbs piece of crap, I've took the time to dismantle the cover at the junkyard. The result was surprising because average voltage of single cell was 3,5v (a little bit low), but the battery was stored a -10°C. So I will discover more details soon.

Tomorrow, lot of disassembly pics for all

Price: less than 2k$ + gas and lunch to a friend with a trailer...

 

Yabert, if you don't mind me asking, how much did you pay?

 

What are the dimensions of the battery modules with armor? (I had them at one time) but I think in my case I would need a leaf battery just because dimensionally it would fit, whereas volt modules would require signfiicant modifications to either of my cars (and I would keep the armor and plug it into the radiator)

Cheers

 

Roughly, 65" long, 37" wide, 15" tall.