Search found 90 matches

by eric1565
Aug 07 2019 7:16pm
Forum: Battery Technology
Topic: VW e-up Li-ion cels
Replies: 44
Views: 7173

Re: VW e-up Li-ion cels

You left out the plastic dividers... why did you do that? I am not 100% sure they are NEEDED but they come from the factory with them, so I would think they may be needed...
by eric1565
Dec 21 2018 2:03pm
Forum: Items for Sale - Used
Topic: Tesla Cells for sale as wrapped or welded packs
Replies: 52
Views: 6540

Re: Tesla Cells for sale as wrapped or welded packs

Here is the latest pack build. This is for a guy who will be putting a Magic Pie hub motor on his bike. This was a 14S9P build. luckily he was in Houston so we could test fit. We found an interference and had to change the design a bit. IMG_20181103_114730217.jpg IMG_20181115_120708783.jpg 5.jpg 3.j...
by eric1565
Oct 12 2018 6:13pm
Forum: Items for Sale - Used
Topic: Tesla Cells for sale as wrapped or welded packs
Replies: 52
Views: 6540

Re: Tesla Cells for sale as wrapped or welded packs

I checked the capacity on the cells. I cycled them from 4.1 to 3.0V and the capacity was 2800mah. So I think that is on par for 18650BE 3200mah cell with a realistic capacity of 3000mah. If I had gone to 4.2 and 2.5, it would be much closer to 3000-3200mah, but I don't like to push the cells like th...
by eric1565
Sep 17 2018 6:51am
Forum: Items for Sale - Used
Topic: Tesla Cells for sale as wrapped or welded packs
Replies: 52
Views: 6540

Re: Tesla Cells for sale as wrapped or welded packs

The cells are from a 2016 70. So I don't know right now. My Icharger blew up last week, and I just sent it off to get fixed. Once I get it back I will check.

Eric
by eric1565
Sep 09 2018 7:27pm
Forum: Items for Sale - Used
Topic: Tesla Cells for sale as wrapped or welded packs
Replies: 52
Views: 6540

Re: Tesla Cells for sale as wrapped or welded packs

I got a module in this week. I am going to remove the cells and I will have 444 cells ready for sale late next week if anybody needs them, or packs made.

Eric
by eric1565
Sep 08 2018 2:05pm
Forum: Items for Sale - Used
Topic: A123 Chevy Spark modules
Replies: 3
Views: 542

Re: A123 Chevy Spark modules

Super difficult. Tabs cells are laser welded and glued as 1 big pack. Best thing u can do is cut the tabs on top and rivit to them....but very sketchy...

I have taken these apart down to individual cells.... Very difficult to disassemble and next to impossible to re attach
by eric1565
Aug 27 2018 1:39pm
Forum: Battery Technology
Topic: DIY battery pack question.
Replies: 2
Views: 364

Re: DIY battery pack question.

I build packs, and I think that is fine. If you are worried, you can measure them all and sort by voltage. Then when you are building your pack you can put the same volt cell in the same parallel group. And then use a balance charger to balance the pack out. But I have found it much faster to charge...
by eric1565
Aug 21 2018 12:52pm
Forum: Items for Sale - New
Topic: 18650 Hexagonal Cell Holders $.15/ea
Replies: 3
Views: 432

Re: 18650 Hexagonal Cell Holders $.15/ea

Yes, total cost is $.3/cell, so a 150 cell pack would cost 45 dollars.

Eric
by eric1565
Aug 21 2018 10:59am
Forum: Items for Sale - New
Topic: 18650 Hexagonal Cell Holders $.15/ea
Replies: 3
Views: 432

18650 Hexagonal Cell Holders $.15/ea

Hey Guys, I print 18650 cell holders. I print them in nylon. This material is AWESOME. I can not get over how strong and tough this material is. I used to use cast urathane, and it was brittle. Nylon is SO SO SO much better. I have been building packs for people. so I have made a ton of holders. Eac...
by eric1565
Aug 19 2018 9:53pm
Forum: Items for Sale - Used
Topic: Tesla Cells for sale as wrapped or welded packs
Replies: 52
Views: 6540

Re: Tesla Cells for sale as wrapped or welded packs

Another battery pack for a guy. This one is a 20S7P. It was difficult to come up with the right layout on this one. No real good way to get lots of nickel between the cells. I will have to solder a copper wire to the center of each one to help with electrical flow. The 25mm wide nickel maxes out at ...
by eric1565
Aug 11 2018 10:38am
Forum: Items for Sale - Used
Topic: Tesla Cells for sale as wrapped or welded packs
Replies: 52
Views: 6540

Re: Tesla Cells for sale as wrapped or welded packs

Printing cell holders for a guy. He gave me the specs and its printing. Also slowly improving my engraving looks...
IMG_20180811_103138402.jpg
I have another triangle pack to do

stephan_holders.jpg
by eric1565
Aug 09 2018 1:59pm
Forum: Items for Sale - Used
Topic: Tesla Cells for sale as wrapped or welded packs
Replies: 52
Views: 6540

Re: Tesla Cells for sale as wrapped or welded packs

Yes it was at the time of the picture taking, but is has been sent away.

See pic for dims... all in mm.
Solaire_design9.jpg
Eric
by eric1565
Aug 08 2018 4:32pm
Forum: Items for Sale - Used
Topic: Tesla Cells for sale as wrapped or welded packs
Replies: 52
Views: 6540

Re: Tesla Cells for sale as wrapped or welded packs

Look at the cells they are 18mm in dia... There is your scale.

Yes 168 cells. Each cell is 11wh, so it is 1.8kwh pack. Big...
by eric1565
Aug 04 2018 8:27pm
Forum: Items for Sale - Used
Topic: Tesla Cells for sale as wrapped or welded packs
Replies: 52
Views: 6540

Re: Tesla Cells for sale as wrapped or welded packs

Ah it was a 14S12P.

A pretty big boy. My charging battery 8S3P of 20ah pouch cells could not cycle half that battery. I may need to make a bigger cycle battery for big packs.

Eric
by eric1565
Jul 25 2018 11:24am
Forum: Items for Sale - Used
Topic: Panosonic 25ah Prismatic cells for sale $28
Replies: 70
Views: 6375

Re: Panosonic 25ah Prismatic cells for sale $22

I don't fully understand the question so here are multiple answers 1. In the stock OEM frame there are 21 - this is the cheapest way to get cells. U buy 21 and I'll sell them for $410 plus shipping 2. I can make any size frame any voltage any capacity range. The frames COST me about $100 to make so ...
by eric1565
Jul 24 2018 10:18pm
Forum: Items for Sale - Used
Topic: Panosonic 25ah Prismatic cells for sale $28
Replies: 70
Views: 6375

Re: Panosonic 25ah Prismatic cells for sale $22

Ok, still working on the car audio battery. But it could be anything depending on how the cell layout. This is a 100ah battery I am making for a guy. I am redesigning it to be beefier, because I think it is a bit wimpy. 4S4P_100ah_1small.jpg 4S4P_100ah_2small.jpg 4S4P_100ah_3small.jpg 4S4P_100ah_4Sm...
by eric1565
Jul 20 2018 11:11pm
Forum: Items for Sale - Used
Topic: Tesla Cells for sale as wrapped or welded packs
Replies: 52
Views: 6540

Re: Tesla Cells for sale as wrapped or welded packs

It is a battery.... Lol... Each cell weighs about 53 grams all said and done 168 cells so ... Ugh math. Who uses this? 8.7kg The thing is SOLID. I was surprised at how stiff it was with the new nylon holders.. It took me a number of designs to get there. It fits in the triangle of a bike. Guy said 3...
by eric1565
Jul 19 2018 10:22pm
Forum: Items for Sale - Used
Topic: Tesla Cells for sale as wrapped or welded packs
Replies: 52
Views: 6540

Re: Tesla Cells for sale as wrapped or welded packs

Pack went out today. Took me a while to build it (sorry about that). But I am VERY happy with those nylon holders. If anybody wants nylon holders let me know. I sell them for .15$ per cell. you need a set top and bottom, so you need to double your cell count. They are 7mm thick. The nylon is so stro...
by eric1565
Jul 17 2018 1:29pm
Forum: Items for Sale - Used
Topic: Tesla Cells for sale as wrapped or welded packs
Replies: 52
Views: 6540

Re: Tesla Cells for sale as wrapped or welded packs

Yeah, I can do that. I can also print a case for the BMS if it needs one.

Eric
by eric1565
Jul 12 2018 10:20pm
Forum: Items for Sale - Used
Topic: Tesla Cells for sale as wrapped or welded packs
Replies: 52
Views: 6540

Re: Tesla Cells for sale as wrapped or welded packs

I have an icharger. I also use a cell logger to monitor my packs. Tesla cells stay pretty balanced if not abused (dragged down to far). BMS 's are good but not required if u can be the human BMS. If u can monitor the voltages and not drag the packs down to far u can work just fine. But u also NEED a...
by eric1565
Jul 11 2018 9:54pm
Forum: Items for Sale - Used
Topic: Panosonic 25ah Prismatic cells for sale $28
Replies: 70
Views: 6375

Re: Panosonic 25ah Prismatic cells for sale $22

Pic of the prototype with the 3D printed terminal caps.
IMG_20180711_084117139.jpg
IMG_20180711_084117139.jpg (125.87 KiB) Viewed 1121 times
by eric1565
Jul 10 2018 9:52pm
Forum: Items for Sale - Used
Topic: Panosonic 25ah Prismatic cells for sale $28
Replies: 70
Views: 6375

Re: Panosonic 25ah Prismatic cells for sale $22

Here are some pics of the model. I'm sorry they are not of the real part, but i'm lazy :( You can hand calc it out pretty easy. Each cell is 1.13 thick, so if you add up the cells X 1.13 and then add on .375" for the 2 end pieces * 2 (.75" total) you should get the lenght of the pack. Yeah pretty cl...
by eric1565
Jul 09 2018 10:22am
Forum: Items for Sale - Used
Topic: Panosonic 25ah Prismatic cells for sale $28
Replies: 70
Views: 6375

Re: Panosonic 25ah Prismatic cells for sale $22

I guess I can get copper. Aluminum is easy to get. And has decent current carrying capabilities. Was thinking of making a nickle solution to coat the aluminum with... If going to do that I guess I should just use copper. I was a bit worried about the oxide, but they use aluminum for wires, well for ...
by eric1565
Jul 08 2018 10:18pm
Forum: Items for Sale - Used
Topic: Panosonic 25ah Prismatic cells for sale $28
Replies: 70
Views: 6375

Re: Panosonic 25ah Prismatic cells for sale $22

I got the 12V car audio battery together. I put in plastic spacers between all the aluminum parts. I ran out of aluminum bar stock so I used some of the OEM buss bars. IMG_20180708_214610178_small.jpg IMG_20180708_214626127_small.jpg IMG_20180708_214723029_HDR_small.jpg IMG_20180708_214733796s.jpg
by eric1565
Jul 05 2018 9:13am
Forum: Items for Sale - Used
Topic: Tesla Cells for sale as wrapped or welded packs
Replies: 52
Views: 6540

Re: Tesla Cells for sale as wrapped or welded packs

can you build a 54.4 [48.1v nominal]30ah pack? what would dimensions be?? I domt know the specs of Tesla cells Eric, Same question, with USA shipping. I would need to get a 48 Vdc (with 30~40 Ah) battery pack. Your printed cell holders look fine to me, but I would have to know the number of cells t...