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by neptronix
Nov 21 2018 1:06pm
Forum: Battery Technology
Topic: Thread for new battery breakthrough PR releases
Replies: 1556
Views: 155032

Re: Thread for new battery breakthrough PR releases

https://electrek.co/2018/11/20/china-pr ... VGQd2XKRb4

^-- solid state battery production is happening this year. 400whrs/kg.
by neptronix
Nov 21 2018 9:57am
Forum: E-Bike Technical
Topic: 9Continent - 9C30H88
Replies: 6
Views: 71

Re: 9Continent - 9C30H88

That's pretty rough..

If the 30mm wide motor is in a 20" wheel, you are in luck.
Check the ebikes motor simulator ( use the mxus 3005 ), but it looks like that motor can do 1500w continuous in the small wheel :shock:
by neptronix
Nov 21 2018 12:11am
Forum: E-Bike General Discussion
Topic: What controller instead of sabvoton
Replies: 4
Views: 134

Re: What controller instead of sabvoton

How much power do you need?
by neptronix
Nov 20 2018 11:57pm
Forum: E-Bike Technical
Topic: 9Continent - 9C30H88
Replies: 6
Views: 71

Re: 9Continent - 9C30H88

Yeah you can only tell by viewing the voltage under load - with a watt meter or similar device.

If the motor looks like an older 9 continent but wider, you're in luck because i imagine that's a 30mm wide motor rated for twice the power of the uber old ones you remember.
by neptronix
Nov 20 2018 11:46pm
Forum: E-Bike Technical
Topic: 9Continent - 9C30H88
Replies: 6
Views: 71

Re: 9Continent - 9C30H88

That's the voltage before the batteries cut out?

My guess is that they're dead.
by neptronix
Nov 20 2018 2:35pm
Forum: Battery Technology
Topic: Friendly reminder. Winter (@northern hemisphere) is kickin' in.
Replies: 5
Views: 208

Re: Friendly reminder. Winter (@northern hemisphere) is kickin' in.

Is it really that bad? Thousands of power tools are used and stored in unheated areas all winter. I have a dmm that lives in my car year round and it's still working. Many of those things you use are properly sealed against the elements. Unfortunately, you cannot expect this for most of our bike ha...
by neptronix
Nov 20 2018 2:18pm
Forum: Large EV General Discussion
Topic: Tesla MS-MX refresh coming in April?
Replies: 3
Views: 68

Re: Tesla MS-MX refresh coming in April?

Cool.. perhaps this means lower prices for the car.. unless the expiration of the tax credit eats up that price cut.
by neptronix
Nov 20 2018 1:50pm
Forum: Forum Rules and Features
Topic: The future of our forum - facebook versus web forums
Replies: 23
Views: 754

Re: The future of our forum - facebook versus web forums

I'm gonna say it right now since my FB users are probably not reading this... :mrgreen: Facebook's design encourages shrill content and makes it far too easy to re-post garbage content without really thinking about it. In addition, their algorithms prioritize more bombastic content which is more oft...
by neptronix
Nov 19 2018 10:52pm
Forum: Battery Technology
Topic: Thread for new battery breakthrough PR releases
Replies: 1556
Views: 155032

Re: Thread for new battery breakthrough PR releases

LG Chem invests in Enevate; silicon-dominant Li-ion battery technology https://www.greencarcongress.com/2018/10/20181024-enevate.html This could be big. A silicon/graphite/lithium battery with >1000 cycles to 80%, high charge rate, and 300whrs/kg. No mention of the discharge, probably putzy, but th...
by neptronix
Nov 19 2018 7:53pm
Forum: E-Bike Non-hub Motor Drives
Topic: PaulD's lightweight mid drive development
Replies: 43
Views: 5247

Re: PaulD's lightweight mid drive development

Marketing is unfortunately key with these things. Things have succeeded on kickstarter that shouldn't have in the past, just because of good marketing. And i've seen legitimately good things fail on KS due to lack of marketing. I'd outsource that task to someone who is capable.... but don't ignore it.
by neptronix
Nov 19 2018 3:08pm
Forum: E-Bike Non-hub Motor Drives
Topic: My RC Mid Drive with Single Stage Reduction
Replies: 94
Views: 3542

Re: My RC Mid Drive with Single Stage Reduction

Here's an idea for a lightweight mid drive.. How about a Bafang G310 fast winding? That motor is 5.6lbs and has an 11:1 reduction inside already. Continuous power in a motor wheel is around 700W. Could possibly do >800W if you spin it to 400rpm, which would be easy to reduce to the crank. Take a fro...
by neptronix
Nov 19 2018 3:02pm
Forum: E-Bike Non-hub Motor Drives
Topic: My RC Mid Drive with Single Stage Reduction
Replies: 94
Views: 3542

Re: My RC Mid Drive with Single Stage Reduction

Yeah, you learned the hard way that more volts doesn't make more power. It's all about the watts. I did the math on a rear drive last night and decided that with a single stage, you really want 10S and a reduction ratio that puts the continuous speed around half of the 'maximum power' - but probably...
by neptronix
Nov 19 2018 1:05am
Forum: E-Bike Non-hub Motor Drives
Topic: My RC Mid Drive with Single Stage Reduction
Replies: 94
Views: 3542

Re: My RC Mid Drive with Single Stage Reduction

Looks line a nice motor from here. Any idea what the lamination thickness is? Looks like if you ran 10s, youd be at around 1800rpm loaded, which would be fantastic for a direct to rear drive At a 4.25:1 rear ratio.. my guess is that the only way to match pedaling cadence in a single stage would be i...
by neptronix
Nov 18 2018 8:11pm
Forum: E-Bike Non-hub Motor Drives
Topic: IT'S ALIVE...... BBS02HD!!
Replies: 13
Views: 456

Re: IT'S ALIVE...... BBS02HD!!

Ay.. kinda amazing that you were able to just drop things in like that. But did you consider that the bbs02 has a weaker drivetrain than the HD before doing this? I've seen the BBS02 drivetrain fail on stock power.. so i'd recommend running.. unfortunately.. bbs02 stock power. ( although you'll have...
by neptronix
Nov 18 2018 3:04pm
Forum: E-Bike Technical
Topic: A portable gasoline generator for long range
Replies: 28
Views: 507

Re: A portable gasoline generator for long range

In the other hand, if you're using the generator so you can wander off the grid and away from opportunities to recharge, then you'd probably be much better off with a gas fueled bike that is built for the job and has an overall better engine. Totally. Build it like a chevy volt and start with the ~...
by neptronix
Nov 17 2018 11:41pm
Forum: E-Bike Technical
Topic: A portable gasoline generator for long range
Replies: 28
Views: 507

Re: A portable gasoline generator for long range

Geez, 19 pounds and then you've gotta waste some gasoline converting 120v AC to ??? DC..
Sad that that's as small/light as it gets.
by neptronix
Nov 17 2018 12:27am
Forum: E-Bike Non-hub Motor Drives
Topic: PaulD's lightweight mid drive development
Replies: 43
Views: 5247

Re: PaulD's lightweight mid drive development

If he wants to crowdfund it he's free to pimp the kickstarter on the endless sphere facebook page once since this is a cottage industry type thing.

..and a cool product.

..or hell, i'll pimp it myself
by neptronix
Nov 17 2018 12:23am
Forum: E-Bike Reviews & Testing
Topic: Luna Black Box: anyone tried it yet?
Replies: 7
Views: 1081

Re: Luna Black Box: anyone tried it yet?

Ps, truth about luna is that they mostly resell other people's stuff and sometimes get a company or person to ship them some customized unit. Could be that the original vendor had a problem with either the product or the company reselling it, which is why many of them aren't in circulation. In the f...
by neptronix
Nov 17 2018 12:14am
Forum: E-Bike Technical
Topic: Bafang G310 geared hub - 11:1 reduction ratio!!!
Replies: 72
Views: 6786

Re: Bafang G310 geared hub - 11:1 reduction ratio!!!

*shrug* you can make about as much power with low volts and high amps. I did 45mph on a super fast winding DD on 47v, no problem. Had to tune the amps down from 85A because i couldn't keep the front wheel on the ground. That's how the leafmotor thread got started. I still have the top speed record o...
by neptronix
Nov 16 2018 11:57pm
Forum: E-Bike Reviews & Testing
Topic: Luna Black Box: anyone tried it yet?
Replies: 7
Views: 1081

Re: Luna Black Box: anyone tried it yet?

You could buy a computer at a thrift store for like 10.. 20 bucks. Bring a vga cord and a pair of power cables with you. If it posts, it probably works and might just need a used hard drive. Hell you don't even need that, you can boot windows or ubuntu off a thumb drive these days. Hell, bring ubunt...
by neptronix
Nov 16 2018 11:32pm
Forum: E-Bike Technical
Topic: A portable gasoline generator for long range
Replies: 28
Views: 507

Re: A portable gasoline generator for long range

All the fuel cells i've seen at ebike sizes are wildly expensive and large. Hydrogen is just a lossy and more expensive way to burn natural gas, unless you can find a holy grail fuel cell that exceeds 60% efficiency. You might as well just run an ICE off a natural gas tank if you wanna be greener. A...
by neptronix
Nov 16 2018 11:14pm
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1367
Views: 156099

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

They've been using the same 0.35mm lams on their motors clearly because well..
Nobody has figured out it is a good idea to move to 0.27mm except MAC motor and some RC motor producers..

Oh, and that new GNG Pro drive that has like 0.2mm laminations or whatnot.
by neptronix
Nov 16 2018 7:41pm
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1367
Views: 156099

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

Geez, other than putting it in a 20" wheel i think you've utilized it as best as possible :)
Not bad.
by neptronix
Nov 16 2018 2:28pm
Forum: E-Bike Non-hub Motor Drives
Topic: PaulD's lightweight mid drive development
Replies: 43
Views: 5247

Re: PaulD's lightweight mid drive development

I was gonna suggest hacking the eggrider for a minimalist display that matches the minimalist mid drive.
GJ on that.
by neptronix
Nov 16 2018 10:53am
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1367
Views: 156099

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

I'm really surprised that you can get rid of all that heat. The 48v graph from leafmotor shows that 3.5kw is 75% efficient, so you've got a ton of heat to shed. OK, no way you are running that power at 48v.. instead you have.. 52.. 60.. 72v? At best you're seeing 80% efficiency. Which is still aroun...