Search found 1226 matches

by mlt34
Sep 19 2019 12:18am
Forum: E-Bike Non-hub Motor Drives
Topic: My Bafang Ultra Mountain Bike! NEW FREY EX and FREY CC
Replies: 41
Views: 2962

Re: My Bafang Ultra Mountain Bike! NEW FREY EX and FREY CC

Micah here - I’ll have more to share soon but the Frey exchange has been epic so far. I’ve never seen such value for eMTBs and the people that founded and run FREY are seriously salt of the earth people. Just amazing.

Sinbord1981 is also a hell of a guy, most positive dude I’ve ever met :lol:
by mlt34
Mar 18 2018 9:36am
Forum: Items for Sale - New
Topic: DIY assembly kit for 18650 without spot welding/Soldering
Replies: 495
Views: 69071

Re: DIY assembly kit for 18650 without spot welding/Soldering

I know you're going to get a dozen suggestions, but...alongside the 60-piece / 30-cell kits, what I'd most recommend is an addotional prepackaged option of 10-pieces / 5-cells. Having only those two options would still keep the ordering simple. Thanks for the suggestion Ron, this is actually someth...
by mlt34
Mar 09 2018 2:23am
Forum: Battery Technology
Topic: 30Q - 6p build... bike range disappointing - IDEAS?
Replies: 46
Views: 3293

Re: 30Q - 6p build... bike range disappointing - IDEAS?

To me that sounds like its an unbalancing issue. The battery is cutting out when the first cell group gets low. Then when you charge, it fills it up but because of the inbalance, it will start balancing when the first cell group is full, but the cell group that caused the cutout is still low. So now...
by mlt34
Feb 27 2018 1:51pm
Forum: Items for Sale - New
Topic: DIY assembly kit for 18650 without spot welding/Soldering
Replies: 495
Views: 69071

Re: DIY assembly kit for 18650 without spot welding/Soldering

Is it possible to fit extra copper wire/plates on top of the bars to allow more current flow? Yes, the testing has been done with a single bus bar, but there is room for 5 or 6 bus bars per cap. However, as I mentioned above, we are reaching the point where the limiting factory will be how much cur...
by mlt34
Feb 27 2018 9:31am
Forum: Items for Sale - New
Topic: DIY assembly kit for 18650 without spot welding/Soldering
Replies: 495
Views: 69071

Re: DIY assembly kit for 18650 without spot welding/Soldering

20amp per cell so 4p Samsung 25r can be used at 50- 60amp peak ? Thinking that it is a 20amp cell. Could that be doable. So if the bars can hold 20A, I can build my 3p battery and get the 60A I need? Yes to both, but remember to keep cell ratings in mind, and to take them with a grain of salt. Yes,...
by mlt34
Feb 26 2018 11:15am
Forum: Items for Sale - New
Topic: DIY assembly kit for 18650 without spot welding/Soldering
Replies: 495
Views: 69071

Re: DIY assembly kit for 18650 without spot welding/Soldering

I also showed a preview of the V2 prototypes in a recent video below. At that point, we had tested the prototypes to as high as 13A, but since then, we've tested them up to 20A with results that show a statistically insignificant difference between the V2 and spotwelded nickel connections during cap...
by mlt34
Jan 14 2018 4:55am
Forum: Items for Sale - New
Topic: DIY assembly kit for 18650 without spot welding/Soldering
Replies: 495
Views: 69071

Re: DIY assembly kit for 18650 without spot welding/Soldering

The caps are designed to be quite tight, as its better to err on the side of they staying put even in conditions of extreme vibrations. The downside of the tight fit is that it is more difficult to remove them, but using the metal ruler method described a few pages back is a good method. This is als...
by mlt34
Nov 06 2017 7:51am
Forum: Items for Sale - New
Topic: DIY assembly kit for 18650 without spot welding/Soldering
Replies: 495
Views: 69071

Re: DIY assembly kit for 18650 without spot welding/Solderin

... and so you were offered a complete refund or replacement. ... complete? The kit was 21 USD and mailing 19 USD. Do you mean these costs would be refunded or a complete new good set sent? What about the cost of mailing the whole kit back to India ( if required) ? Hi Optimistx, Sorry, this might n...
by mlt34
Oct 31 2017 2:43am
Forum: Items for Sale - New
Topic: DIY assembly kit for 18650 without spot welding/Soldering
Replies: 495
Views: 69071

Re: DIY assembly kit for 18650 without spot welding/Solderin

*update* Vruzend told me to just assemble a small pack and be happy, so i did. and all i can say is LOL. Alright Nathan, now this bothers me. You are simply being dishonest. This is not at all what Urvakhsha said to you. He is an exceedingly polite guy, even more so when you consider that English i...
by mlt34
Oct 19 2017 8:03am
Forum: Items for Sale - New
Topic: DIY assembly kit for 18650 without spot welding/Soldering
Replies: 495
Views: 69071

Re: DIY assembly kit for 18650 without spot welding/Solderin

Hey Nathan, Micah here from Vruzend USA. I haven't read your email exchanges so forgive me if I don't have all the details, but perhaps I can shed some light here. I totally understand what you mean. You buy something new, open the box, and then its like "hey man, there's a crack right here". You're...
by mlt34
Oct 18 2017 9:36am
Forum: Items for Sale - New
Topic: DIY assembly kit for 18650 without spot welding/Soldering
Replies: 495
Views: 69071

Re: DIY assembly kit for 18650 without spot welding/Solderin

Would having 1 continuous bus bar on each parallel row make that much of a difference reducing resistance? The parallel connections between the 10 cells actually has very little current flow, we're talking on the milliamp scale. All of the current that is part of the 'power' your motor and controll...
by mlt34
Sep 18 2017 2:27am
Forum: Items for Sale - New
Topic: DIY assembly kit for 18650 without spot welding/Soldering
Replies: 495
Views: 69071

Re: DIY assembly kit for 18650 without spot welding/Solderin

The kits are supposed to come with 100 caps, but we started putting 104 in the box so users have some extra, and since so many people wanted to do 52 cell packs. We had to draw the line somewhere though, because 56 cells packs are also common, as are 60 cell packs, and 65 cells, and 69, and 70, and ...
by mlt34
Aug 10 2017 7:55am
Forum: Items for Sale - New
Topic: DIY assembly kit for 18650 without spot welding/Soldering
Replies: 495
Views: 69071

Re: DIY assembly kit for 18650 without spot welding/Solderin

cwah wrote:What does the v2 look like? I need compact brackets
Outwardly it will look similar. If you need compact, you shouldn't go with brackets at all, as every bracket adds a bit of space where it holds the cells. Just hot glue your cells together.
by mlt34
Aug 09 2017 5:33am
Forum: Items for Sale - New
Topic: Quality 36V/48V/52V ebike chargers with ES discount
Replies: 0
Views: 370

Quality 36V/48V/52V ebike chargers with ES discount

36V, 48V and 52V chargers (all 3A) available starting at $34.99 here in North America. Use coupon code EScharger for an extra 10% off!

Chargers have a cooling fan, 110V-240V AC input range, 5.5x2.1mm DC barrel output plug, USA wall plug, and come in any color you want, as long as its black.
by mlt34
Aug 02 2017 2:50pm
Forum: Items for Sale - New
Topic: DIY assembly kit for 18650 without spot welding/Soldering
Replies: 495
Views: 69071

Re: DIY assembly kit for 18650 without spot welding/Solderin

The USA seller told me that the V1 version is rated by them for about 2.5 amps per cell. I am waiting for V2 because I need about 6 amps per cell as a max draw. I must have missed the post(s) about how to raise that number for the V1 version. Do you have a link to information about that? It's actua...
by mlt34
Jul 26 2017 9:52am
Forum: E-Bike General Discussion
Topic: Electric penny farthing project
Replies: 15
Views: 1680

Re: Electric penny farthing project

Justin, everybody. Showing why the "search" feature is important!

Awesome build! Unfortunately I never progressed with this project, but I'm glad to see that you did! The hardest part for me was finding a penny farthing. I still have a 12" q85 motor just waiting for something fun like this...
by mlt34
Jul 15 2017 9:55am
Forum: Items for Sale - New
Topic: DIY assembly kit for 18650 without spot welding/Soldering
Replies: 495
Views: 69071

Re: DIY assembly kit for 18650 without spot welding/Solderin

So when is Version 2 coming? I thought July. I'm impatient my apologies. We haven't announced a release date yet since we're still working on the design and testing phase. Then we'll have to make some production changes since we won't be able to use the same production line. It's likely that we'll ...
by mlt34
Jul 15 2017 4:17am
Forum: Items for Sale - New
Topic: DIY assembly kit for 18650 without spot welding/Soldering
Replies: 495
Views: 69071

Re: DIY assembly kit for 18650 without spot welding/Solderin

I love a good jig! That's a creative way to do it. Nice job!
by mlt34
Jun 30 2017 4:57am
Forum: Items for Sale - New
Topic: DIY assembly kit for 18650 without spot welding/Soldering
Replies: 495
Views: 69071

Re: DIY assembly kit for 18650 without spot welding/Solderin

No, they are fine, it is easy enough no pry them apart. Actually you do not need to pry apart whole pack for repairs, if you orient the dovetails of the holders right way, you can split the pack in any place and remove the Series block or cell with the holder mounted. Truth. Also, the mallet method...
by mlt34
Jun 25 2017 2:52am
Forum: Items for Sale - New
Topic: DIY assembly kit for 18650 without spot welding/Soldering
Replies: 495
Views: 69071

Re: DIY assembly kit for 18650 without spot welding/Solderin

It's a shame to do all that work only to break everything down again, but if it were me, I'd save the laptop cells for a low power project. They are still "good" in that they hold charge and can deliver low power, so a camping battery or a mobile charging bank for a cell phone would be a great use f...
by mlt34
Jun 24 2017 1:49pm
Forum: Items for Sale - New
Topic: DIY assembly kit for 18650 without spot welding/Soldering
Replies: 495
Views: 69071

Re: DIY assembly kit for 18650 without spot welding/Solderin

Yea those laptop cells are definitely going to be taking a beating. 1.5C is basically the limit for even some name brand cells like Samsung 26F and Panasonic 18650B cells. So those laptops cells are probably being pushed past their realistic design limits. But hey, it's for science, right?! :lol:
by mlt34
Jun 24 2017 9:29am
Forum: Items for Sale - New
Topic: DIY assembly kit for 18650 without spot welding/Soldering
Replies: 495
Views: 69071

Re: DIY assembly kit for 18650 without spot welding/Solderin

4.3A continuous will start to have some heat build up in the contacts, but I imagine you won't be running continuous all the time (most level riding is well below full power, plus factoring in stops and starts, etc). As far as laying out the battery, you'll follow the same idea as if you had 14 colu...
by mlt34
Jun 24 2017 8:28am
Forum: Items for Sale - New
Topic: DIY assembly kit for 18650 without spot welding/Soldering
Replies: 495
Views: 69071

Re: DIY assembly kit for 18650 without spot welding/Solderin

Oooh I've been wanting to try some nickel plating in the kitchen. I watched some youtube videos and was tickled at how simple it looked :D
by mlt34
Jun 22 2017 1:11pm
Forum: Items for Sale - New
Topic: DIY assembly kit for 18650 without spot welding/Soldering
Replies: 495
Views: 69071

Re: DIY assembly kit for 18650 without spot welding/Solderin

Question to those in the know is using nickel to interconnect the parallel pack ok? Yes, for the parallels you can use a surprisingly small connector, even thin wire would work. There is very little current flowing through the parallel connections. All the cells drain basically equally, so the only...
by mlt34
Jun 21 2017 7:13am
Forum: Items for Sale - New
Topic: DIY assembly kit for 18650 without spot welding/Soldering
Replies: 495
Views: 69071

Re: DIY assembly kit for 18650 without spot welding/Solderin

banjaxxed, what is the material in the wire making the series connections?