Chevy Volt individual Cells FOR SALE. 10C 15Ah

Got something to sell? Have extra parts that need a good home? Have something that others would need to complete their kits? Post it up here and see if anyone else is searching for what you are selling.
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DogDipstick   10 mW

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Chevy Volt individual Cells FOR SALE. 10C 15Ah

Post by DogDipstick » Jan 29 2019 1:12pm

Chevy Volt individual Recycled Cells available: "LG P1" 15Ah (rated) capable of 10C, tested and datalogged. Actual capacity/cell available. 6.5" x 8.5" x .35" ea. A spreadsheet/cell of the test shipped w. each.. 15.00$ EA+ actual shipping. Please inquire within. TY!

NMC-LMO

Willing to ship ( or at least try) Anywhere ! Good track record shipping all over. LOCATED IN FLEETWOOD PA 19522
Last edited by DogDipstick on Feb 17 2019 7:11am, edited 9 times in total.
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Re: Chevy Volt individual Cells FOR SALE. 10C 15Ah

Post by DogDipstick » Jan 29 2019 1:15pm

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Re: Chevy Volt individual Cells FOR SALE. 10C 15Ah

Post by Ongar » Feb 03 2019 6:21pm

What are the history and average actual capacity of these cells?

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Re: Chevy Volt individual Cells FOR SALE. 10C 15Ah

Post by DogDipstick » Feb 05 2019 7:01pm

I do not know the mileage or lifespan of the vehicle they came out of. Volt modules were purchased . Purchased from GreenAutoHybridSpecialist, (also a member here on Endlessphere), an online retailer of Salvage EV batteries. He has a good reputation. However, he seems to give the impression that he doesnt even want to give you the time of day it you are not spending 1000$ or more with him. I am willing to spring more for a pack with a documented history. These were sold sight unseen, because of his heavy workload, with a few know bad cells ( that are weeded out through testing.) No testing was available from the seller.

He sells these for anywhere from 200$-400, "damaged", ( useless for EV.)

I regularly input over 13.5 AH, on a discharge to 3.254V, from 4.15v/Cell. They have shown consistent Ir. An example: of six cells, four had an Ir of 1.6, while two had an Ir of 1.7 mohm. This can be shown on the datalog. This 13.5 AH out would indicate a 90% lifespan left.

I have one module in the garage ready to be broken open, being tested for long term self discharge. All cells are holding good voltage.. so far working on a month since last charge. I received the cell with most cells in the 3.5 range, some dead ( bad cells that will be thrown out, but make the pack useless for an EV.). This module may test better. It looks to have had an easier life than the last.

90% of the original ( rated 15Ah) capacity. On a EV cell designed and warranted for 100,000 mi, 8 years, and installed with an OEM BMS that never fully charged or depleted the pack ( research Chevy Volt BMS algorithms...).

I have tested cells that read in the 4+ mOhms, but they are considered "failed". I will not sell those. . I have been running these cells for several months. No problems or inconsistencies.

I will post a six-screenshot datalog of a full cycle: of one of my 6s packs working in harmony at afull discharge, then charge cycle. At .5 C rate, 7.5 amps or so, I predict the data will show 13.25+ to 13.75 amp hours out at a time of four hours for the full cycle to complete.

I go 8 miles regularly to about 3.85V/Cell. Throttle mostly.

This is all I can say. If you are not satisfied I'm here to help. I'll keep a customer satisfied, even if it means replacement. I am an enthusiast, not a commercial re-saler. They are documented here if you dig deep enough, aside from the first few threads you see when you search "chevy volt" on the forum.

I can tell you the year the vehicle was manufactured. I think the sticker is still there. I'll include it with the datalog when i post it. Ty.

(IMPORTANT EDIT:)
I contacted the seller, he claimed the date code sticker was proprietary. Makes me question (?), for he has stated here on the forum that it can be acquired through that sticker ( but not how). Oh well, I can always have my guys work on it. I'll report back.
Last edited by DogDipstick on Feb 06 2019 6:44pm, edited 7 times in total.
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Re: Chevy Volt individual Cells FOR SALE. 10C 15Ah

Post by fechter » Feb 05 2019 7:51pm

Can you post a picture of the cell?
"One test is worth a thousand opinions"

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Re: Chevy Volt individual Cells FOR SALE. 10C 15Ah

Post by DogDipstick » Feb 05 2019 9:46pm

Sure. This is from my first module I bought. Fresh out of the stack. Its dirty, but it is not corroded or damaged. Initial voltage is written on the cell, as received, I assemble primarily with C-Tap style copper crimps, drilled twice for rivets, and cells padded from one another, and insulate cell connections with sheet rubber separators. Balance wired and outputs for serial connection. This has given me all the power I need with my 14s BBS02 locally. I have had success with soldering the tabs also.
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Please excuse the mess, this is before wiping them off with a paper towel, with debris from removal. I can disassemble the cells in a (3P) ( three cells in parallel, 45 Ah)) form factor, but there would be no way of individually testing the cells for dead ones, inconsistencies, damage, capacity loss. ( i.e. the dead one or two that ruined the pack as an EV pack). I expect the next module to be better. I'll upload new pics i about a week, when I break in to that one. Along with the results.
Pics of actual items before purchase, if you are serious. I am not expecting a quick sale. I want a good sale. One thing can be said, definitively. There is no way I'm selling fake cells here ( like you find in the 18650 jungle). You don't have to worry about that.
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Re: Chevy Volt individual Cells FOR SALE. 10C 15Ah

Post by Ongar » Feb 07 2019 7:05pm

DogDipstick wrote:
Feb 05 2019 9:46pm
Sure. This is from my first module I bought. Fresh out of the stack. Its dirty, but it is not corroded or damaged. Initial voltage is written on the cell, as received, I assemble primarily with C-Tap style copper crimps, drilled twice for rivets, and cells padded from one another, and insulate cell connections with sheet rubber separators. Balance wired and outputs for serial connection. This has given me all the power I need with my 14s BBS02 locally. I have had success with soldering the tabs also.
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Please excuse the mess, this is before wiping them off with a paper towel, with debris from removal. I can disassemble the cells in a (3P) ( three cells in parallel, 45 Ah)) form factor, but there would be no way of individually testing the cells for dead ones, inconsistencies, damage, capacity loss. ( i.e. the dead one or two that ruined the pack as an EV pack). I expect the next module to be better. I'll upload new pics i about a week, when I break in to that one. Along with the results.
Pics of actual items before purchase, if you are serious. I am not expecting a quick sale. I want a good sale. One thing can be said, definitively. There is no way I'm selling fake cells here ( like you find in the 18650 jungle). You don't have to worry about that.
I'm Definitely interested. Just out of curiosity, how do you separate the pack into individual cells? Can you post a pic of how you connect the cells into a pack? I think I get the idea but a picture would be awesome.

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Re: Chevy Volt individual Cells FOR SALE. 10C 15Ah

Post by unklegrumpknee » Feb 16 2019 9:38am

Just wondering. If you test a 3p cluster as a single battery and it acts like it is three times the capacity of the single cell, wouldn't that mean all cells are okay?

I am interested in some for both my ebike and more importantly an off grid camp.

Thanks

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Re: Chevy Volt individual Cells FOR SALE. 10C 15Ah

Post by DogDipstick » Feb 17 2019 6:54am

Hi folks Im back. ..
unklegrumpknee wrote:
Feb 16 2019 9:38am
Just wondering. If you test a 3p cluster as a single battery and it acts like it is three times the capacity of the single cell, wouldn't that mean all cells are okay?

I am interested in some for both my ebike and more importantly an off grid camp.

Thanks

I believe so. I can do a discharge and a charge to verify, I am currently i position to test sucha theory. Im capacity testing my second module right now, and have to find the baseline capacity in to figure accuratly what you could estimate from charging one single Parallel group within the 12s module.

This Volt Module seems in better condition than the last. No dirt, alot cleaner. Blue cell separators, instead of black.
Every cell in this module has been sold already. It will build three batteries, and get shipped out tin the following week. One interested party is an ES member, on here, from way back, and said they would reveiw my build, that which I am very happy to have him do so. We are finalizing final plan revision.

I am working on the possibility of sourcing a complete Volt battery this summer ( 14Kwh or 16Kwhr), for anywhere from 2-3K$. History of the pack is imperative, should I be putting down that kind of money. My only goal is to keep my own hobby alive, learn, and share.

Construction specifics, plans, and pics to come, along with this modules test data. For now here are some pics:
Module #2
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Experimenting with using a DB9 Dsub sheilded connector instead of a JST-Xh balance connector. I have also thought of using Ethernet or phone jack style wire for balancing connections, I never liked the JST, but thats whats out there, and that is what is used alot so ....

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Battery cores being built

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Tooling on the press

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Punches
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Last edited by DogDipstick on Feb 26 2019 5:30am, edited 2 times in total.
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Re: Chevy Volt individual Cells FOR SALE. 10C 15Ah

Post by DogDipstick » Feb 17 2019 8:25am

Test Result: 14.25 Ah Out, 4.18V to 3.06V. 1C Charge rate, 8Amp ( .5C) Discharge rate.

95% of the original LGCHEM 15Ah rated capacity.

Test Result # 2, from a cell at the other end of the module, tested to 15,126mAh. Same Test criteria.

101% of the LGCHEM Rated 15Ah capacity.

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Re: Chevy Volt individual Cells FOR SALE. 10C 15Ah

Post by 999zip999 » Feb 18 2019 3:12pm

What are the tabs made of. ?

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Re: Chevy Volt individual Cells FOR SALE. 10C 15Ah

Post by DogDipstick » Feb 18 2019 9:51pm

An Aluminum Alloy, and a tinned Copper. They are thick, ( if you want an exact measurement I will acquire it for you. ) but not very heat resilient: The Aluminim tab will cook, and get very soft and brittle, if you take to long to solder and do not have appropriate insulation or heatsinking. Tinning can be problematic ( but not impossible): I prefer to stay away from soldering and stick with mechanical connections. If you leave them alone ( in relation to heat) they are very sturdy.
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Re: Chevy Volt individual Cells FOR SALE. 10C 15Ah

Post by 999zip999 » Feb 18 2019 10:09pm

Yes I had very good luck with bolting aluminum and copper tabs over 5yrs on one pack problem free.

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Re: Chevy Volt individual Cells FOR SALE. 10C 15Ah

Post by 999zip999 » Feb 22 2019 3:55pm

The 8.5 measurement the height with the tabs ?

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Re: Chevy Volt individual Cells FOR SALE. 10C 15Ah

Post by DogDipstick » Feb 23 2019 2:59pm

999zip999 wrote:
Feb 22 2019 3:55pm
The 8.5 measurement the height with the tabs ?
That would be without the tabs . Here is an accurate measurement:

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Here are some shots of the materials I use to connect the cells into strings: Dead soft 100% Aluminum rivets, , 99.99% pure sheet copper, 8 and 10 ga. copper, lugs, wire for balance, Kaptron, the punch and die sets, my custom punch, ect. You can see the brake cut copper strips ready to make blanks next to the punches.

As for the assembly process of the custom 6s packs I build; I will be using pure copper sheet, a custom punch, Aluminum rivets, appropriately sized to allow for expansion and contraction in the joint. The punch will be sized correctly also for no interference in the assembly process, and is strong enough to fit my Arbor press and punch through all layers in one motion. A balance lead will be resistance soldered to each copper lug for balancing duty. No excessive heat will be applied to the cell, ( whatsoever.). I can solder this wire onto the cleat before it rivets the tabs together in the string.

The entire assembly will be shrunk with strong PVC heat shrink, sized to provide a good amount of compression to the pack, and strength. Every electrical connection will be insulated from another using Kaptron tape as a primary insulator, and then a rubber sheet roofing product as a secondary insulator folded over every cell connection. As for durability, I have accidently dropped 6s packs on the garage floor on the corner without having any obvious damage or loss, and upon disassembly have not found a problem. The layered construction makes for a strong design.

The first and last cells will be isolated from every other cell in the pack with a cell separator sheet. If you want hard sides to your battery pack I could cut a cell size piece of acrylic 1/8" sheet for each face of the pack (6.5"x10") and shrink another section of heat shrink to hold the two pieces of acrylic in place. This piece of heat shrink will not go around the corners of the acrylic so there will be no puncturing problem from the shrinking process.

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More to come.
Last edited by DogDipstick on Feb 24 2019 7:29pm, edited 5 times in total.
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Re: Chevy Volt individual Cells FOR SALE. 10C 15Ah

Post by 999zip999 » Feb 23 2019 3:18pm

Thanks for checking. I made a cardboard box at 8.5 and it barley fit my fs mtb and now I couldn't squeeze it in.

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Re: Chevy Volt individual Cells FOR SALE. 10C 15Ah

Post by RayGo1 » Feb 26 2019 3:46am

Hey Zip, it's me RayGo. It's been over 5 years since we last posted!
I'm using this new userid because I can't get back on my old RayGo account.

My own A123 pack died recently. One cell puffed up badly and 2 cells outright died. Probably my own fault for not maintaining the battery since I did not ride over the last year.

I am seriously considering having DogDipStick build me a new battery pack with these LG cells. These cells are the same size as the A123 cells but rated for 15Ah rather than the A123's 20Ah and lipo rather than lifepo4. I like DogDipStick's build process. His shrink-wrap process makes his pack slightly smaller than mine but lighter at 11lbs vs. my 16.5lbs. So 2 of his 12s packs could provide a whopping 28Ah+ for 5.5lbs more for me on a really long ride down the Santa Ana River Trail. I considered getting all "new" replacement A123 cells but the 20Ah was overkill for my normal club rides.

Once we get the battery pack all speced out, I plan to post a review of his build. I also like this build over using lipo packs like those from HobbyKing and I'm kinda leery of the sources for A123 cells.

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Re: Chevy Volt individual Cells FOR SALE. 10C 15Ah

Post by 999zip999 » Feb 26 2019 7:30pm

:!: yeah I like these cells but I just can't fit them in my full suspension frame. I got lucky with my A123 20ah cells 5yrs still going. But a lot of people got burn with A123 20ah cells. Lots. These cells are more legit. I bolted my cells togethere with long threaded rod with plastic and aluminum bolts and clear tubing over the rod for installation. Will look for pic.
https://endless-sphere.com/forums/downl ... &mode=view
These thead has a lot of different ways to connect tabs of copper and aluminum tabs. That S.A. trail goes from Newport beach for 30 miles no cars.
Yes I love 15ah cells as just a few connections not like 18650 a hundreds of connections.

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Re: Chevy Volt individual Cells FOR SALE. 10C 15Ah

Post by DogDipstick » Mar 06 2019 11:53am

RayGo1 wrote:
Feb 26 2019 3:46am
Hey Zip, it's me RayGo. It's been over 5 years since we last posted!
I'm using this new userid because I can't get back on my old RayGo account.

Hi Ray! Nice to hear from you here. Please; Call me Jean-Paul. "Dipstick " was my BF from way back when and I use his name to honor his gusto ( for a Jack Russel is quite the breed). It is nice to see that thee are some ol' Players checking out my builds. I always lack time and have a big garage to warm up every time I want to work on cell, but I have been busy. I have sold a couple batts locally and have been supporting a friend on a Cyclone build. We will see these batteries on that bike and see how they respond. As for RayGo1's battery, I will be emailing you shortly. Last round of questions then I should be ready to ship out.

However, here is some news.

I have build 4 batteries in a 6s configuration with this module so far. I have consistently gotten good test results, 60%+ reaching near or to full 15 Ah. However, 25% of the cells ( most with a low voltage restore necessary to bring to storage voltage at initial testing) were reporting 12.5-13.2 Ah. These cells lost capacity in their parallel groups because of one weak cell ( or more ) in the group. They still work, have low Ir, charge, and are temp sensitive, they have just lost capacity. 15% of the cells in the module (approx) being over capacity. I cannot calculate the resolution of my tests. I can only rely on repeatability. I charge a newly built pack from storage voltage @ 1C . Then, discharge @ .5C, followed by a charge back to storage. The Initial charge log shows cells coming together. The Discharge shows capacity out. The Storage charge shows Ir of the pack from a depleted state. I am dischrging the cells using a constant current non balanced discharge ( not a constant power or balanced discharge, so this log show all cells being depleted regardless variable in direct relation to steady state current (c-rate). ) :) It is what my charger can do.

I did manage to build a 6s battery of 15.4 Ah out. The other three (6s cores) were tested and logged 14.75-14.85 Ah out right on the money. Cells matched nicely on the logs, and initial balance charge was painless.
Image You can see the cascade of voltabe in unison @ around 3.4v - 3.3 v.... but they keep kicking until the discharge stops @ 3.00v. So Id say 80% capacity is to 3.3v, but the 75% of that is ( 60% total cap) is from 3.95v to 3.72v(SOC). I did map the pack on a fuel map generator, so we will know accurate SOC with these cells, but it needs consistency and more repeatibility to build an accurate map ( read: 10 more tests on the map, or 40 more hours of testing... ).

I had one freak cell that logged 15.67 Ah out. I will build 13 Ah packs out of the depleted cells and put them to duty. I will not let them go to waste. Image

More pack testing to do. A log takes about 4 hours each battery to prove.
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Batt harness ready to be punched into place and riveted to a core...
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Ghetto balancing pre-build.... ( I really charge them on logs, all to 3.8v then do this just to be sure lol...)

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More pics soon.
Last edited by DogDipstick on Mar 14 2019 10:01am, edited 2 times in total.
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Re: Chevy Volt individual Cells FOR SALE. 10C 15Ah

Post by RayGo1 » Mar 06 2019 7:21pm

Have you considered bolting the cells together rather than using rivets? That would make it much easier to disassemble a pack for repair, if necessary. It makes me nervous to think about drilling out a rivet with these cells. I used stainless steel 6/32 x 3/8 hex head bolts, washers and self locking nuts on my build. They are also relatively inexpensive in bulk.

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Re: Chevy Volt individual Cells FOR SALE. 10C 15Ah

Post by DogDipstick » Mar 09 2019 12:25pm

RayGo1 wrote:
Mar 06 2019 7:21pm
Have you considered bolting the cells together rather than using rivets? That would make it much easier to disassemble a pack for repair, if necessary. It makes me nervous to think about drilling out a rivet with these cells. I used stainless steel 6/32 x 3/8 hex head bolts, washers and self locking nuts on my build. They are also relatively inexpensive in bulk.
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Yes I have considered that. I can get the smaller fasteners in bulk for about 2.00$/lb. 1lb of smaller-than-1/4-20 is alot of lil screws. However, a stainless and steel do not transmit current like the aluminum, and are inherently tought to work with or more expensive than the rivets. Plus bolts loosen, can be overtightened, I like the tabs to be light and with the ( dead soft) rivets, they flatten into a profile less than .2inch. Less than what I believe a reliable threaded fastener could do, and with better shear properties. You lso dont want stainless in an application that is repeatably heated ( loosening). I do use high quality wire rubber tape and rivets. I like the product feeling more substantial.

The rivets I use are 100% aluminum, so the shank is soft as can be,. I have drilled out and replaced cells before ( when tests show a deficient cell) and it is quite easy. Less than ten seconds with an 1/8 bit and fingertip pressure backing the drilling up. You could probally shear the rivet head off with pliers. They will hold strong though. The pouch will rip before the tab or connection( you could use one of my 6s packs like a rugbeater and the wires would not fail first... I believe).

BTW, Raygo, I sent you an email.
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Re: Chevy Volt individual Cells FOR SALE. 10C 15Ah

Post by 999zip999 » Mar 09 2019 1:49pm

Hey https://endless-sphere.com/forums/downl ... &mode=view
Four threaded rods cover with clear tubing with alternating plastic and aluminum blocks I threaded the aluminum blocks for sense wires or bms . I did put Vaseline on parts

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Re: Chevy Volt individual Cells FOR SALE. 10C 15Ah

Post by DogDipstick » Mar 09 2019 9:54pm

Yes ^^^ That was a beautiful build.

Todays progress, and the pictures.

Each battery is 5.95lb. including the acrylic. I ran out of heatshrink, but you could imagine a second layer over the acrylic to offer better protection. More heatshrink on the way. They sit flat at a total height of 3.25 inches, including the four peices of .1in acrylic, for the pair stacked. Pics of insulating shrinking and plating with clear acrylic ( that which btw I can give you a price/lb for if you are looking for some... ) Both batteries together hold about 750 watt hours in a 12s string, considering 15Ah and 50.4v max. Two balance plugs, two 6s charges and they are full, cells " conservatively rated by GM as 7.8C", and four configurable leads. 750Wh.


I built a 2s battery that reported 15.761 Ah today, with these cells, also. :)

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Re: Chevy Volt individual Cells FOR SALE. 10C 15Ah

Post by 999zip999 » Mar 10 2019 4:34pm

You can charge them with one or two meanwells and monitor. The quality of the cells should make ez to keep balance like 4.1v . Test ride. Picture of that ebike grin.
What's the finish measurements ?

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Re: Chevy Volt individual Cells FOR SALE. 10C 15Ah

Post by DogDipstick » Mar 11 2019 10:34am

As Shown, each 6s battery is 6.5 x 10 x 1.725in. The acrylic shown above is cut @ 9.5in x 6.5in.

Oh yeah, once you do the initial balance the cells all just sit there together. Every charge after that is all fast and not needing a long balance period. They drain together ( see log above) and only diverge when voltge reaches bottom. Even then they come back together around 3.4v-3.5v when charged unbalanced. Very unlike my HK and Pulse lipos for my Rc Helis. They are beat up though and require the wonky cell to be balanced forever sometimes. Constantly drained past 3.6. You can see the cells walking around at rest on a monitering datalog, with HK lipos.

I just went for a ride on my BBSo2 with these packs, went 6.7 miles, throttle only, 35* F. Voltage went from 4.15v to 3.79v, and the most of the capacity is from like 3.9v to 3.7v. Im about to go on an 18 mile ride with a 14s pack. I will report consumption then. This is with one 15.4Ah (6s) and one 15Ah (6s), and one (2s) 15.5Ah for my 14s string.


EDIT Just went for a ride. Up and down, approx 700ft elevation, and then some. Basically as fast as I could go the whole time.
Throttle only, high gear most of the time, 28-38mph in high ( down hills and in the flat), no less than 12 mph up the hills in low. All throttle no pedaling.
50* out and two leisurely hours of riding. It was nice. My destination was 8.5 miles away, I got home and had to keep riding for a little to hit the Bafangs LVC.

From 4.175v to 3.275v, I went 19.6 miles. I put 15.35 Ah back into each pack evenly.
Last edited by DogDipstick on Mar 13 2019 8:47am, edited 1 time in total.
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