Search found 58 matches

by shawname
Dec 21 2016 1:59pm
Forum: Items for Sale - New
Topic: Modular Rebuildable Repairable 18650 battery.
Replies: 60
Views: 6197

Re: Modular Rebuildable Repairable 18650 battery.

You are right, I did leave out the split 8 pack. The spreadsheet is being fixed now. I recommend split 8's over 4 packs when you have an even number of series cells for just the reason you noticed- it is more compact.

Thanks for that!

Shawn
by shawname
Dec 21 2016 7:12am
Forum: Items for Sale - New
Topic: Modular Rebuildable Repairable 18650 battery.
Replies: 60
Views: 6197

Re: Modular Rebuildable Repairable 18650 battery.

Thanks for that Tom, I agree on every point. I am just getting my feet under me as I experience growing pains. I have made some mistakes on orders and have had to order another printer. I am having trouble keeping inventory to ship promptly. As it turns out the market for BatteryBlocs goes beyond eb...
by shawname
Dec 21 2016 6:44am
Forum: Items for Sale - New
Topic: Modular Rebuildable Repairable 18650 battery.
Replies: 60
Views: 6197

Re: Modular Rebuildable Repairable 18650 battery.

Not yet, though I may be offering those kinds of kits in the future. I do make a very nice spot welded high capacity triangular pack for Busetti Bicycles now.
by shawname
Dec 20 2016 6:21am
Forum: Items for Sale - New
Topic: Modular Rebuildable Repairable 18650 battery.
Replies: 60
Views: 6197

Re: Modular Rebuildable Repairable 18650 battery.

If you go to my website and email me with what you want and your address I will prepare an accurate shipping quote using USPS flat rate. It will still be expensive though.
by shawname
Dec 19 2016 2:34pm
Forum: Items for Sale - New
Topic: Modular Rebuildable Repairable 18650 battery.
Replies: 60
Views: 6197

Re: Modular Rebuildable Repairable 18650 battery.

Thank you, Yes, that is my strategy. I buy the cells a 1000 at a time to keep the costs down. I do make a little on each cell. I trust you will be very pleased with your BatteryBlocs, I do receive compliments. I rode my Yuba Mundo around the USA, 10,000 miles in 4 months on BatteryBlocs to test them...
by shawname
Dec 18 2016 2:09pm
Forum: Items for Sale - New
Topic: Modular Rebuildable Repairable 18650 battery.
Replies: 60
Views: 6197

Re: Modular Rebuildable Repairable 18650 battery.

OK,- the problem is my computer always recognizes me as me and lets me edit everything so I can't test to see if the permissions are working.

Try this:

https://docs.google.com/spreadsheets/d/ ... 1842214958
by shawname
Dec 18 2016 1:47pm
Forum: Items for Sale - New
Topic: Modular Rebuildable Repairable 18650 battery.
Replies: 60
Views: 6197

Re: Modular Rebuildable Repairable 18650 battery.

Sorry,

I am having a hard time setting the permissions correctly on this Google doc.
See if I have it right now?

http://www.batteryblocs.com/the-battery ... eview=true
by shawname
Dec 17 2016 1:28pm
Forum: Items for Sale - New
Topic: Modular Rebuildable Repairable 18650 battery.
Replies: 60
Views: 6197

Re: Modular Rebuildable Repairable 18650 battery.

There are two ways to build a 14S-4P pack. One way is to use fourteen 4P cases. Another way is to seven 4P2S cases. See this calculator: https://docs.google.com/spreadsheets/d/1zRhEVfDlPzX60O0Do861BGJJugPLNpTtfS96OoBWtlU/edit#gid=0 You can connect them front to back and side to side using steel plat...
by shawname
Dec 12 2016 2:44pm
Forum: Items for Sale - New
Topic: Modular Rebuildable Repairable 18650 battery.
Replies: 60
Views: 6197

Re: Modular Rebuildable Repairable 18650 battery.

Tom- part of the issue is that there are so many configurations.... It's a bit like asking for the measurement of Lego's! The measurements for the common pieces are there in the product pictures: http://www.batteryblocs.com/groceries/eight-pack/ for example. I'll get to it for the new 12, 14 and 16 ...
by shawname
Dec 12 2016 7:17am
Forum: Items for Sale - New
Topic: Modular Rebuildable Repairable 18650 battery.
Replies: 60
Views: 6197

Re: Modular Rebuildable Repairable 18650 battery.

Yes, I see the need for sizing. The original Blocs have sizing but I have added new products. I am a bit swamped at the moment, but will put that on the to-do list. In the meantime if you will send me the measurements of your battery bag I will make some suggestions. Also I do ship USPS priority mai...
by shawname
Dec 11 2016 6:20am
Forum: Items for Sale - New
Topic: Modular Rebuildable Repairable 18650 battery.
Replies: 60
Views: 6197

Re: Modular Rebuildable Repairable 18650 battery.

No, I use a plastic gasket called a "potato chip" because I always print them from yellow plastic. You can see them at mw website www.battteryblocs.com.
by shawname
Dec 10 2016 3:44pm
Forum: Items for Sale - New
Topic: Modular Rebuildable Repairable 18650 battery.
Replies: 60
Views: 6197

Re: Modular Rebuildable Repairable 18650 battery.

Sure, I could do that. Do you think I should offer a BMS with the package? I kinda hate to do that because the BMS's are failure prone and then I have to warranty them and any failed batteries. You say you have a BMS source? I'd like to know it as I have tried many- with similar results no matter wh...
by shawname
Sep 05 2016 6:17am
Forum: Items for Sale - New
Topic: Modular Rebuildable Repairable 18650 battery.
Replies: 60
Views: 6197

Re: Modular Rebuildable Repairable 18650 battery.

Thanks for the kind words!

I hope to have a new video out on diagnosing and repairing Lithium Ion battery packs in the next few weeks.
by shawname
Aug 28 2016 7:26pm
Forum: Items for Sale - New
Topic: Modular Rebuildable Repairable 18650 battery.
Replies: 60
Views: 6197

Re: Modular Rebuildable Repairable 18650 battery.

Thanks Scotty, Galvanized steel is a decent conductor. The mass of a conductor also determines how much resistance it has, the more massive the conductor the less resistance. So by using a very large zinc plated steel plate with a lot of surface contact area resistance is minimal. Yes, the dimension...
by shawname
Aug 27 2016 12:52pm
Forum: Items for Sale - New
Topic: Modular Rebuildable Repairable 18650 battery.
Replies: 60
Views: 6197

Re: Modular Rebuildable Repairable 18650 battery.

JumperJackFlash wrote:Really clever idea.

How much strain can the bolts take?

Hmm, they are nylon bolts rated for 16 foot lbs torque. A 10 pack has four of them. When tightened they clamp the cells tightly, but not so tightly the cells can't be rotated with resistance.

Does this help?
by shawname
Aug 27 2016 12:51pm
Forum: Items for Sale - New
Topic: Modular Rebuildable Repairable 18650 battery.
Replies: 60
Views: 6197

Re: Modular Rebuildable Repairable 18650 battery.

Yes, I stock Panasonic 18650B cells at 3350 mah hours. I build battery packs both spot welded and with BatteryBlocs and so always stock those cells. I sell the cells at a bit over cost as an incentive to purchase BatteryBlocs. You can buy the number of cells it takes to fill your BatteryBlocs order,...
by shawname
Aug 27 2016 12:10pm
Forum: Items for Sale - New
Topic: Modular Rebuildable Repairable 18650 battery.
Replies: 60
Views: 6197

Re: Modular Rebuildable Repairable 18650 battery.

Thank you for your comment.

My pack is reliable. The neodymium magnets provide button tops for the cells and make it easy to assemble. It's the nylon bolts that provide the compressive strength. A feature of BatteryBlocs is that it can flex and vibrate and not have any spot welds break!
by shawname
Feb 19 2016 9:45am
Forum: Items for Sale - New
Topic: Modular Rebuildable Repairable 18650 battery.
Replies: 60
Views: 6197

Re: Modular Rebuildable Repairable 18650 battery.

I've been working with the PTEG filament on your suggestion, thank you. It does print well. It bridges less well than PLA, and there is a big bridge on the BatteryBloc case. Also, it is less rigid than PLA..... I can see where this would be desirable in some cases, but I like the structural integrit...
by shawname
Feb 11 2016 5:56pm
Forum: Items for Sale - New
Topic: Modular Rebuildable Repairable 18650 battery.
Replies: 60
Views: 6197

Re: Modular Rebuildable Repairable 18650 battery.

Cool, thanks for taking the time.

Yes, the fence posts work great. They are a good size, 4" fits between the knees!

I'll do another video soon on the endcaps- with cell loggers and xt60 and xt90 connectors and sensor wire connections.
by shawname
Feb 11 2016 2:41pm
Forum: Items for Sale - New
Topic: Modular Rebuildable Repairable 18650 battery.
Replies: 60
Views: 6197

Re: Modular Rebuildable Repairable 18650 battery.

Yes, I am using galvanized 1010 steel. The steel is 12% as conductive as copper. The zinc coating is 27% as conductive as copper. Compared to spot welding? You need resistance to weld. Solid nickel strips are 22% as conductive as copper. And the battery builder may have used nickel plated steel- it'...
by shawname
Feb 11 2016 11:49am
Forum: Items for Sale - New
Topic: Modular Rebuildable Repairable 18650 battery.
Replies: 60
Views: 6197

Re: Modular Rebuildable Repairable 18650 battery.

Yes, the plastic parts of the cases are 3d printed from PLA. They are complex and 3d printing is very cost effective. Injection molding would give a better finish, but I can't justify the cost of the molds. The plastic parts hold up quite well when not exposed to the elements. If left in the sun or ...
by shawname
Feb 11 2016 11:36am
Forum: Items for Sale - New
Topic: Modular Rebuildable Repairable 18650 battery.
Replies: 60
Views: 6197

Re: Modular Rebuildable Repairable 18650 battery.

Personally I'm quite impressed! I think the concept of small mini modules makes it easier to maintain good pressure on the connections with the tensioning bolts. Obviously the bolts needed to be plastic, but is the idea that they create a degree of elasticity and keep even pressure? The modular sys...
by shawname
Feb 11 2016 11:25am
Forum: Items for Sale - New
Topic: Modular Rebuildable Repairable 18650 battery.
Replies: 60
Views: 6197

Re: Modular Rebuildable Repairable 18650 battery.

Hillhater wrote:Any testing done on the resistance of the magnets compared to spot welded connections ?
15 magnets stack to about 1" with no measurable resistance on my ohm meter. They are nickel plated neodymium.
by shawname
Feb 10 2016 7:53pm
Forum: Items for Sale - New
Topic: Modular Rebuildable Repairable 18650 battery.
Replies: 60
Views: 6197

Modular Rebuildable Repairable 18650 battery.

Thought I'd introduce a way of assembling 18650 cells into a battery that does not commit the cells by spot welding. The battery can be disassembled to be repaired, to have the cells upgraded, or reconfigured to change voltage or ampacity. "BatteryBlocs®" are built from parallel groups of 4, 6, 8 an...