Search found 32 matches

by Barncat
Jan 21 2021 7:44pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Custom Kickbike Build (laser cut and welded frame)
Replies: 16
Views: 2215

Re: Custom Kickbike Build (laser cut and welded frame)

This is way over built and heavy with steel and a hub motor, but nice clean lines and proportions. Kudos. I have a similar design planned in aluminum with an outrunner. Stand up rides are cool.
by Barncat
Jan 20 2021 10:37pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Another Bomber/Enduro Clone
Replies: 10
Views: 594

Re: Another Bomber/Enduro Clone

Pedals, it seems to me, are vestigial on a 150lb "ebike" :). But nice work and problem solving. Clever end to end arrangement on those headway cells. I considered using those for my current project for their simplicity and safety but they're heavy, bulky, and expensive... I have a couple o...
by Barncat
Jan 18 2021 6:04pm
Forum: Battery Technology
Topic: What's the current gamut of solderless/weldless 18650 battery pack construction?
Replies: 20
Views: 773

Re: What's the current gamut of solderless/weldless 18650 battery pack construction?

Thanks for the suggestions and link. Decent looking charger. I need to do a bit more bms study...
by Barncat
Jan 18 2021 9:33am
Forum: Battery Technology
Topic: What's the current gamut of solderless/weldless 18650 battery pack construction?
Replies: 20
Views: 773

Re: What's the current gamut of solderless/weldless 18650 battery pack construction?

EMark- you've spent some time on studying all those fasteners... I'm getting closer to real world on-bike testing of my idea. Works fine on the bench, but anything does. One big potential upside is very few fasteners. The first layout I built was 10s7p. I decided that two of those are just too large...
by Barncat
Jan 16 2021 6:56pm
Forum: Motor Technology
Topic: I assume this generic controller has LVC?
Replies: 7
Views: 233

Re: I assume this generic controller has LVC?

Thanks for the heads up Thor. Actually the cutoff isn't a problem in my case, just wasn't able to test the whole setup with an undervolt battery. Now I know.
by Barncat
Jan 16 2021 6:34pm
Forum: E-Bike Build Threads / Photos & Video
Topic: 3000w Mongoose girder
Replies: 22
Views: 806

Re: 3000w Mongoose girder

I see you managed to put a couple wheels on that battery there Voltron :).
by Barncat
Jan 16 2021 9:43am
Forum: E-Bike Build Threads / Photos & Video
Topic: 3000w Mongoose girder
Replies: 22
Views: 806

Re: 3000w Mongoose girder

Hey Voltron- agreed it's imperative to be safety conscious. As referenced at top of thread I'm an experienced motorcycle test pilot with 100k miles on 20 different builds. I wring the bikes out pretty hard but only where it's appropriate to do so. Plus maybe 50k cycling miles in my younger days... S...
by Barncat
Jan 15 2021 5:08pm
Forum: Battery Technology
Topic: What's the current gamut of solderless/weldless 18650 battery pack construction?
Replies: 20
Views: 773

Re: What's the current gamut of solderless/weldless 18650 battery pack construction?

Your performance requirements are pretty conservative eMark, but you have some data there re copper vs stainless. Those kits have their purpose and it's not my place to critique them. I'm coming at this from a mechanical engineer's perspective. I should have more to report on my project in a week or...
by Barncat
Jan 15 2021 4:46pm
Forum: E-Bike Build Threads / Photos & Video
Topic: 3000w Mongoose girder
Replies: 22
Views: 806

Re: 3000w Mongoose girder

Got around to setting up a test rig. Wheel spins up great. The only thing holding me up is the experimental no weld/no solder battery build which is almost done...

That and some paint and so forth and the toy will be on the road.
by Barncat
Jan 13 2021 10:04pm
Forum: Battery Technology
Topic: What's the current gamut of solderless/weldless 18650 battery pack construction?
Replies: 20
Views: 773

Re: What's the current gamut of solderless/weldless 18650 battery pack construction?

Well... stainless is of course on the bottom end of the conductivity scale, but at least it doesn't corrode...

Your attention to detail will help improve the breed eMark.
by Barncat
Jan 13 2021 7:13pm
Forum: Motor Technology
Topic: I assume this generic controller has LVC?
Replies: 7
Views: 233

Re: I assume this generic controller has LVC?

Hey guys. The good news is I had an old li-ion pack collecting dust that I'd sort of forgotten about that still had 31v on it. So i put that in series with my latest experimental pack @ 36v and the motor spun up perfectly. So now the only thing preventing me from completing the Mongoose girder build...
by Barncat
Jan 12 2021 9:28pm
Forum: Battery Technology
Topic: What's the current gamut of solderless/weldless 18650 battery pack construction?
Replies: 20
Views: 773

Re: What's the current gamut of solderless/weldless 18650 battery pack construction?

Hey SirW- thanks for relating your experience. The Vruzend system obviously works. The part count is astronomical however. Looks like that and the NESE are about it other than some DIY experiments. There are a lot of compromises with battery selection and construction- particularly for such lightwei...
by Barncat
Jan 12 2021 9:03pm
Forum: Motor Technology
Topic: I assume this generic controller has LVC?
Replies: 7
Views: 233

Re: I assume this generic controller has LVC?

Hey TC- I did assume correctly then that the low voltage cutoff is the problem. That would be obvious i guess to anyone experienced with these boxes. I could certainly be excused for not knowing what the hell "turn the" means... :) I'll have to get the full battery pack together and I susp...
by Barncat
Jan 12 2021 10:23am
Forum: Motor Technology
Topic: I assume this generic controller has LVC?
Replies: 7
Views: 233

I assume this generic controller has LVC?

I've done a lot of reading on site but since this is my first ebike project- I interpret the label on the box to mean there is LVC that can be user dialed in from 1.1v - 3.7v below 60v nominal pack voltage? I was attempting to just bench test the throttle wiring with a 36v pack. I don't have the sec...
by Barncat
Jan 12 2021 12:01am
Forum: Battery Technology
Topic: What's the current gamut of solderless/weldless 18650 battery pack construction?
Replies: 20
Views: 773

Re: What's the current gamut of solderless/weldless 18650 battery pack construction?

Thanks all for the input. Wasn't asking anyone to do a lot of research- just a sentence or two about what's out there. In the past 24 hours I believe I've scanned most of the archived material on this topic here on the forum. Obviously there are dozens of considerations when assessing the novelty, m...
by Barncat
Jan 10 2021 8:06pm
Forum: E-Bike Build Threads / Photos & Video
Topic: 3000w Mongoose girder
Replies: 22
Views: 806

Re: 3000w Mongoose girder

Hey Chalo- you misinterpreted my "torque" comment. I was referring to the video clip posted above by Voltron. The 3000w motor I'll be using is not exactly a monster but there are some good accounts of it elsewhere on the forum so long as you don't push it past 6000 rpm too long. Plan is to...
by Barncat
Jan 10 2021 3:29pm
Forum: E-Bike Build Threads / Photos & Video
Topic: 3000w Mongoose girder
Replies: 22
Views: 806

Re: 3000w Mongoose girder

(Per the video above) Ha! Little bit a torque there or what?

I really need to get this ride built for testing. As you all know the DIY battery stuff is very time consuming. I'm a regular motorcycle guy so some facets of this type of project are slowing me down.
by Barncat
Jan 10 2021 3:07pm
Forum: Battery Technology
Topic: What's the current gamut of solderless/weldless 18650 battery pack construction?
Replies: 20
Views: 773

Re: What's the current gamut of solderless/weldless 18650 battery pack construction?

Not willing to post pics at this time... Ordinarily i would for a regular build thread. The US patent process changed some years ago from first to "reduce to practice" to first to file. I've been an inventor for decades. I did start scanning the "sticky" post in this category an ...
by Barncat
Jan 10 2021 12:14pm
Forum: Battery Technology
Topic: What's the current gamut of solderless/weldless 18650 battery pack construction?
Replies: 20
Views: 773

What's the current gamut of solderless/weldless 18650 battery pack construction?

Just asking those who've been around this field for a while... All I'm really aware of is the Vruzend system.

I've just built what I believe to be a novel enclosed prototype that's efficient, quick and easy to assemble/disassemble, with all copper buss bars and low part count.
by Barncat
Jan 10 2021 11:51am
Forum: E-Bike Build Threads / Photos & Video
Topic: 3000w Mongoose girder
Replies: 22
Views: 806

Re: 3000w Mongoose girder

FWIW, I detoured into the weeds to design a 10s7p enclosed solderless/weldless battery pack that assembles in about 10 minutes WITHOUT hundreds of vruzend style fasteners. High efficiency all copper buss bars. I'm not going to post pics yet as it may have patentable features. Have not battle tested ...
by Barncat
Dec 31 2020 9:38am
Forum: E-Bike Build Threads / Photos & Video
Topic: 3000w Mongoose girder
Replies: 22
Views: 806

Re: 3000w Mongoose girder

The concept is speedway bike. Rear dropouts were extended by about 5 inches, I found a great aluminum fork for cheap on ebay and went with a nice 24" front wheel, a motor mount was carefully added to frame, custom footpegs, and seat post was cut and a small plate welded on for a temporary plywo...
by Barncat
Dec 31 2020 9:13am
Forum: E-Bike Build Threads / Photos & Video
Topic: 3000w Mongoose girder
Replies: 22
Views: 806

Re: 3000w Mongoose girder

Cool, it worked. Used the android Litphoto app to compress below 512kb.
by Barncat
Dec 31 2020 9:10am
Forum: E-Bike Build Threads / Photos & Video
Topic: 3000w Mongoose girder
Replies: 22
Views: 806

Re: 3000w Mongoose girder

Another pic upload attempt
by Barncat
Dec 13 2020 10:24am
Forum: E-Bike Build Threads / Photos & Video
Topic: 3000w Mongoose girder
Replies: 22
Views: 806

Re: 3000w Mongoose girder

I see pic size limit is 512kb. No way to compress pics on my phone and no PC so no go...
by Barncat
Dec 12 2020 7:55pm
Forum: E-Bike Build Threads / Photos & Video
Topic: 3000w Mongoose girder
Replies: 22
Views: 806

Re: 3000w Mongoose girder

Pic upload from Android failed. Trying again...