Search found 10582 matches

by spinningmagnets
Oct 22 2019 2:18pm
Forum: E-Bike Non-hub Motor Drives
Topic: BBSHD vs. BBS02?
Replies: 7
Views: 260

Re: BBSHD vs. BBS02?

I'd say yes. Will you own two ebikes? If you'll only have one, get the BBSHD. if you use the extra power on rare occasions, be aware the BBS02 has less power, so it could not have done what the bbshd does. If you only use 1100W, the bbs02 can do that, but the bbshd would run cooler at that power lev...
by spinningmagnets
Oct 22 2019 2:12pm
Forum: Battery Technology
Topic: Aluminum-Air Battery
Replies: 6
Views: 140

Re: Aluminum-Air Battery

I've heard of zinc-air and aluminum-air cells. The raw data from reliable sources suggest these have a great potential for long range in a reasonably sized package. The reason no big money is pursuing how to improve them has been stated above...they are disposable, not rechargeable. The materials ar...
by spinningmagnets
Oct 21 2019 8:21am
Forum: E-Bike Technical
Topic: Motor axle too small for dropout
Replies: 2
Views: 132

Re: Motor axle too small for dropout

Make clamping dropouts, and place them inside the frame arms. The prototypes shown below are made from aluminu, the performance version should be water-jetted or laser-cut from steel/stainless steel.m https://endless-sphere.com/forums/download/file.php?id=184021 https://endless-sphere.com/forums/dow...
by spinningmagnets
Oct 17 2019 5:33pm
Forum: E-Bike General Discussion
Topic: What kind of drive is this?
Replies: 4
Views: 179

Re: What kind of drive is this?

Here's everything you need to know about that drive...

https://www.electricbike.com/2014-ezip-trailz-lithium/
by spinningmagnets
Oct 17 2019 4:59pm
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 890
Views: 102106

Re: kWeld - "Next level" DIY battery spot welder

LOL, thanks for the Jackie Chan pic. In the nickel-copper "layered" pic, the nickel is only there to focus the welding current, instead of dissipating it, like a "copper only" bus would do. In fact, the nickel only needs to be a small square over the cell-ends, because a full-length strip would have...
by spinningmagnets
Oct 17 2019 2:23pm
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 890
Views: 102106

Re: kWeld - "Next level" DIY battery spot welder

I am not a fan of double layers of nickel strips (due to adding multiple bottlenecks), or the 0.30mm thick nickel strips (although the thicker single-layer nickel may be rated for higher amps, the total current will have to flow through the same area of weld-connections). Of course they both work, b...
by spinningmagnets
Oct 15 2019 10:45am
Forum: E-Bike General Discussion
Topic: Why not comfort bikes?
Replies: 41
Views: 957

Re: Why not comfort bikes?

My most-ridden ebike is an Electra cruiser. I trimmed an inch off of the top of the seat-tube, and then switched to a Suntour NCX, which is shorter than the Thudbuster by one inch. I liked the long-travel Thudbuster (LT), but it was a bit tall. I would have gladly kept it if there were no other opti...
by spinningmagnets
Oct 15 2019 10:38am
Forum: General Discussion
Topic: Active energy transfer balancing
Replies: 14
Views: 883

Re: Active energy transfer balancing

Bump, to mark this thread. I like this idea. Tesla, Chevy Volt, and Nissan Leaf charge to 4.05V per cell. Doing that helps the cells last longer, and also provides a safety margin. That leaves a need for some way to balance the cells. Equalizing seems like a reliable way that has no failure mode whe...
by spinningmagnets
Oct 14 2019 6:19am
Forum: E-Bike General Discussion
Topic: Why not comfort bikes?
Replies: 41
Views: 957

Re: Why not comfort bikes?

Why not both? I have a Cruiser frame with a BBSHD. It's what I ride most often. It has fat tires and a Suntour NCX seat-post which works well. It runs very quietly. I normally cruise around at around 20-MPH, but I want a 30-MPH capability for when I want to get away from traffic. If I was frequently...
by spinningmagnets
Oct 13 2019 6:01am
Forum: E-Vehicles General Discussion
Topic: Can EVs survive without subsidies ?
Replies: 19
Views: 336

Re: Can EVs survive without subsidies ?

When Tesla offered an 8-year warranty on their battery pack (the battery would retain at least 80% of its rated range during the 8 years), Many people expressed scepticism, because we all have used cordless drills and laptops where the battery did not last 8 years. Because of their battery research,...
by spinningmagnets
Oct 06 2019 7:06am
Forum: Items for Sale - New
Topic: QS MOTOR,0.5-14kW Electric Hub Motor Manufacture China
Replies: 1263
Views: 223301

Re: QS MOTOR,0.5-14kW Electric Hub Motor Manufacture China

What is the most powerful motor you make? Some of QS's earliest products were very fat and powerful hubmotors made to convert 2-stroke scooters into electric, and then they have supplied factory-electric scooters and motorcycles for many years. http://www.qs-motor.com/product-catagory/e-scooter-hub...
by spinningmagnets
Oct 04 2019 11:34am
Forum: General Discussion
Topic: White putty used in battery packs?
Replies: 11
Views: 328

Re: White putty used in battery packs?

Dow Silastic, or a cheap copy of that.

It's a "silicone" that stays "elastic" after it dries.
by spinningmagnets
Sep 30 2019 4:57pm
Forum: Battery Technology
Topic: What Electric Vehicles are using 18650's?
Replies: 6
Views: 351

Re: What Electric Vehicles are using 18650's?

Before Alta Motorcycles went out of business, they used 18650s. Sure Ron uses 18650s.

Zero motorcycles has been using flat pouch cells for several years now.

Index of EV battery packs
viewtopic.php?f=14&t=89680
by spinningmagnets
Sep 27 2019 9:57pm
Forum: Motor Technology
Topic: MagnaChip new 100V mosfet
Replies: 0
Views: 188

MagnaChip new 100V mosfet

"MagnaChip Targets Fast-Growing e-Bike Market with High-Performance MOSFET" https://www.semiconductor-digest.com/2019/09/24/magnachip-targets-fast-growing-e-bike-market-with-high-performance-mosfet/ ...a 100V Mid-Voltage MOSFET with a new thermal package (“M2PAK-7P”)...achieves a best-in-class therm...
by spinningmagnets
Sep 27 2019 7:28pm
Forum: Battery Technology
Topic: My excellent adventure through some battery builds
Replies: 185
Views: 25380

Re: My excellent adventure through some battery builds

Thanks for posting those details, EG. The kWeld can use an input of 3V-30V, but the max input for the kCap is 8.2V, which the designer determined in his humble opinion is the optimum balance between volts and the amps/timing. Of course the kWeld still works with a 12V car battery, or a high-amp 3S L...
by spinningmagnets
Sep 24 2019 4:09pm
Forum: Items for Sale - Used
Topic: Tesla Model 3 red color 2019
Replies: 12
Views: 549

Re: Tesla Model 3 red color 2019

The price in US dollars is $19.840 (at current USD=EU conversion)

I suspect that there is something very wrong with this vehicle, or...this is a scam.
by spinningmagnets
Sep 22 2019 7:55pm
Forum: E-Bike Technical
Topic: Edge 1,500 watt motor ( crap) !!!
Replies: 2
Views: 202

Re: Edge 1,500 watt motor ( crap) !!!

"Very good magnet bonding epoxy" (bigmoose, Doctorbass)
viewtopic.php?t=27270
by spinningmagnets
Sep 22 2019 4:33pm
Forum: Motor Technology
Topic: magnets held without glue?
Replies: 16
Views: 453

Re: magnets held without glue?

I would recommend that you do a quick search of Interior Permanent Magnet / IPM (compared to the common surface mounted magnets) Those designs are useful, especially for a motor with high RPMs...
by spinningmagnets
Sep 21 2019 12:24pm
Forum: EV Business World
Topic: Tesla Model 3
Replies: 1092
Views: 69591

Re: Tesla Model 3

“can achieve 7:20”...WTF does that mean?
This claim means that they believe the newest Model-S can run one full lap of the Nürburgring track in 7 minutes, 20 seconds.

https://en.wikipedia.org/wiki/N%C3%BCrburgring
by spinningmagnets
Sep 18 2019 11:16am
Forum: E-Vehicles General Discussion
Topic: Taycan video with some useful information
Replies: 33
Views: 977

Re: Taycan video with some useful information

When you double the amps, but only get 10% more power, I suspect the motor was at the point of saturation. After magnetic saturation is reached, I'm told that additional amps above that will add some power, but...it adds only a small amount of power, in exchange for a lot of waste-heat. I believe th...
by spinningmagnets
Sep 17 2019 4:48pm
Forum: General Discussion
Topic: Legends dropping like flies
Replies: 274
Views: 34963

Re: Legends dropping like flies

Eddie Money, dead at 70 on Sept 13, 2019. Esophageal cancer

https://youtu.be/5FtHhUDo-08, Two Tickets to Paradise