Search found 535 matches

by ebuilder
Oct 05 2022 7:18pm
Forum: EBike Non-hub Motor Drives
Topic: BBS02 motor whine
Replies: 32
Views: 792

Re: BBS02 motor whine

Well, switching out my buddies rotor with mine had no effect on the motor whine. The only variable is blind bearing which I have no reason to suspect. :( Doing it tomorrow. Removed the blind bearing using the BREAD method. The method worked nicely. See the video. https://youtu.be/4rxEvWwSMt4 I don'...
by ebuilder
Sep 28 2022 1:52pm
Forum: EBike Troubleshooting
Topic: Bike died mid ride
Replies: 9
Views: 249

Re: Bike died mid ride

Ok I will test the controller it when I get home… Does the FET inside the battery look like a fuse? Sorry I don’t even know what FET stands for FET: https://en.wikipedia.org/wiki/Field-effect_transistor FET's are on the Battery Management System circuit board inside your battery enclosure. They loo...
by ebuilder
Sep 28 2022 4:20am
Forum: Bike Mechanical & Structural
Topic: ? These must be junk
Replies: 5
Views: 539

Re: ? These must be junk

QUOTE: We as consumers therefore have to be our own filter which is difficult and why we rely so heavily on word of mouth and anecdotal successes and failures. Is a great Quote Combination of the Wisdom of the Market and other people's insurance premium payments. But that covers a lot of things. Va...
by ebuilder
Sep 28 2022 4:02am
Forum: Battery Technology
Topic: Why the BMS Doesn't Work as You Believe
Replies: 27
Views: 637

Re: Why the BMS Doesn't Work as You Believe

For example, some people, quite sure its in the ten's of thousands believe, its ok for a transexual girl athlete who was born a biological male with XY chromosome to compete against biological women...that its fair. This is two divergent groups of people who draw very different conclusions given th...
by ebuilder
Sep 27 2022 2:55pm
Forum: E-Vehicles General Discussion
Topic: Rize Liberty – What a mess for a $15.00 design oversight.
Replies: 41
Views: 1052

Re: Rize Liberty – What a mess for a $15.00 design oversight.

Why limit your self to a Reention Dorado 48V 21ah Battery? There are plenty of other options out there. :D :bolt: Guess I was just showing my ignorance to this technology. Make and model is not important to me. I'm more interested in the plug and play function rather than retrofitting. May be easy ...
by ebuilder
Sep 27 2022 1:59pm
Forum: Battery Technology
Topic: Why the BMS Doesn't Work as You Believe
Replies: 27
Views: 637

Re: Why the BMS Doesn't Work as You Believe

For example, some people, quite sure its in the ten's of thousands believe, its ok for a transexual girl athlete who was born a biological male with XY chromosome to compete against biological women...that its fair. T Please keep your neofascist garbage in the Biker Bar. Good to know where you stan...
by ebuilder
Sep 27 2022 12:39pm
Forum: Battery Technology
Topic: Why the BMS Doesn't Work as You Believe
Replies: 27
Views: 637

Re: Why the BMS Doesn't Work as You Believe

Cheez, There is a curosity of nature. Maybe not too difficult to fathom because it really is how the world works. Take two people...lets pick two...lets say a scientist and a car salesman and provide the same set of data, both will reach different conclusions won't they? This is because most are voc...
by ebuilder
Sep 27 2022 7:41am
Forum: EBike Technical
Topic: What BMS for 21700 cells?
Replies: 6
Views: 185

Re: What BMS for 21700 cells?

I am planning a battery build ...14s 5p using Samsung 40T cells. (21700 @ 4000 mAh) The cells have a rated nominal voltage of 3.6 ...so a 14s pack runs 50.4 volts. The controller for my hub motor is rated for 25A continuous. I am unsure as to what BMS to use... Can anyone please advise? A related c...
by ebuilder
Sep 26 2022 2:11pm
Forum: Battery Technology
Topic: Why the BMS Doesn't Work as You Believe
Replies: 27
Views: 637

Re: Why the BMS Doesn't Work as You Believe

Quite sure Cheez is unaware of the distinction between drift velocity or even the speed of an electric field. In any event he is wrong on both accounts. Cheez, drift velocity of electrons is slow and even an electric field generated via a battery potential is less than the speed of light due to the ...
by ebuilder
Sep 26 2022 11:03am
Forum: Battery Technology
Topic: Why the BMS Doesn't Work as You Believe
Replies: 27
Views: 637

Re: Why the BMS Doesn't Work as You Believe

Cheez,
If Elon didn't believe in the necessity of a BMS on all his cars, he wouldn't have one. All his cars do.

https://tesla-info.com/guide/tesla-bms-calibration.php

Tesla S-series BMS:
Tesla Model S BMS.jpg
Tesla Model S BMS.jpg (344.2 KiB) Viewed 286 times
by ebuilder
Sep 25 2022 9:23pm
Forum: EBike Troubleshooting
Topic: Help with battery to motor connector !
Replies: 9
Views: 226

Re: Help with battery to motor connector !

Amberwolf is very knowledgeable about hub drives and can likely direct you to where you can purchase the identical connector. I presume you will hear back but if not, you could send that picture in an email to Grin Products and they can likely hook you up or direct you. Just provide all pertinent mo...
by ebuilder
Sep 25 2022 8:52pm
Forum: EBike Troubleshooting
Topic: Help with battery to motor connector !
Replies: 9
Views: 226

Re: Help with battery to motor connector !

Here you go Amberwolf....
Connector.jpg
Connector.jpg (122.55 KiB) Viewed 170 times
by ebuilder
Sep 25 2022 7:55pm
Forum: EBike Troubleshooting
Topic: Yamaha/Haibike battery won’t turn on. BMS dead?
Replies: 2
Views: 130

Re: Yamaha/Haibike battery won’t turn on. BMS dead?

There is a possibility however unknowable unless you go into the battery that the BMS is not integral to the nightmare CANBUS/diagnostic Yamaha proprietary architecture. In other words, this battery which is now a useless brick due to frocked BMS due to your good intention, maybe repairable without ...
by ebuilder
Sep 25 2022 6:54pm
Forum: EBike Technical
Topic: If I give a BMS slightly lower volts, will it still balance?
Replies: 7
Views: 277

Re: If I give a BMS slightly lower volts, will it still balance?

If you want good longevity and proper balancing buy an active balancer that will do the job in a short time (at a decent current rate) and at any SoC/voltage point you desire. Do you have a link for a 14s, 52v battery for this active balancer? How do you plug it into the battery to individually bal...
by ebuilder
Sep 25 2022 3:56pm
Forum: EBike Non-hub Motor Drives
Topic: Question about Bafang BBSHD maintenance/parts
Replies: 1
Views: 141

Re: Question about Bafang BBSHD maintenance/parts

I have about 2,000 miles on my BBSHD without any problem. However, I intend to open up at least the drive side to add/replace some grease. (I have noticed that if I spin the pedals backwards there is zero drag and the click-click sound is rather 'metallic', denoting in my opinion a lack of grease)....
by ebuilder
Sep 25 2022 2:31pm
Forum: EBike Non-hub Motor Drives
Topic: Can I replace my BBS02 motor core / rotor with a BBSHD?
Replies: 9
Views: 311

Re: Can I replace my BBS02 motor core / rotor with a BBSHD?

In spite of it all including lack of traceability being at the root of no accountability...with cheap replacement parts and good overall reliability, once transitioning out of the early growing years, in particular the BBSHD which was an improvement by Bafang based upon lessons learned from BBS01/2,...
by ebuilder
Sep 25 2022 12:58pm
Forum: EBike Build Threads
Topic: My econo-e-bike
Replies: 264
Views: 34081

Re: My econo-e-bike

I hope you share how you wire this up E-HP.
Good stuff.
by ebuilder
Sep 25 2022 12:50pm
Forum: EBike Non-hub Motor Drives
Topic: Can I replace my BBS02 motor core / rotor with a BBSHD?
Replies: 9
Views: 311

Re: Can I replace my BBS02 motor core / rotor with a BBSHD?

If your motor is not a 02-B version built after early 2016 I'd go for a new bare motor. Parts for early pre-B versions are a PIA to access and more often than not unavailable. BBSHD has two versions of the rotor and a typical Bafang move, has no serial number tracking... My 02-B was purchased from ...
by ebuilder
Sep 25 2022 10:44am
Forum: EBike Technical
Topic: BMS only showing 5v out
Replies: 15
Views: 257

Re: BMS only showing 5v out

Amberwolf is somewhat the forum expert on this subject but just to add OP... I bought a brand new 52v battery out of China and it stopped working after the first bike ride. I contacted the seller and we worked through the troubleshooting and like your battery, the cells measured OK but was getting a...
by ebuilder
Sep 25 2022 7:11am
Forum: EBike Build Threads
Topic: E-bike + carbon frame + 52V. 18650 + BMC motor
Replies: 516
Views: 89724

Re: E-bike + carbon frame + 52V. 18650 + BMC motor

Dude, feel ya on having a racer's heart and yearning for more. Something you are born with and can be traced back to childhood. :-) Same here. I have aged and perhaps nth degree power isn't the end all for me any longer. I am placated by 'good power' and don't need overwhelming power. The Daytona i...
by ebuilder
Sep 24 2022 7:21pm
Forum: EBike Non-hub Motor Drives
Topic: Can I replace my BBS02 motor core / rotor with a BBSHD?
Replies: 9
Views: 311

Re: Can I replace my BBS02 motor core / rotor with a BBSHD?

Wondering if the two motors are interchangeable using the same BBS02 main housing and controller. Planning ahead in the event that I have to replace my 02 motor due to the 'whine' issue discussed here: https://endless-sphere.com/forums/viewtopic.php?f=28&t=117672 . If I understand it correctly,...
by ebuilder
Sep 24 2022 6:57pm
Forum: EBike Troubleshooting
Topic: Truing this Disc rotor is trying my patience
Replies: 71
Views: 1213

Re: Truing this Disc rotor is trying my patience

What a absolute miserable road to race on! My hat's off to those who can ride that at speed. 🏁🏁🏁 It is for sure. A throwback to a different time when roads were more commonly cobbled in Europe. A race of strength and endurance very different from the Tour de France and why those who win the most co...
by ebuilder
Sep 24 2022 6:03am
Forum: EBike Troubleshooting
Topic: Truing this Disc rotor is trying my patience
Replies: 71
Views: 1213

Re: Truing this Disc rotor is trying my patience

Nope. What the mechanic missed is a fundament of good rear derailleur shifting. .... Actually, unless the pavements in his part of the world are much better maintained than those around here, his major mistake was building a "road bike". The world I come from...racing road bikes. I am tra...
by ebuilder
Sep 23 2022 3:27pm
Forum: Battery Technology
Topic: Why the BMS Doesn't Work as You Believe
Replies: 27
Views: 637

Re: Why the BMS Doesn't Work as You Believe

999zip999 wrote:
Sep 23 2022 3:08pm
Nobody likes the Cheez . Limburger
Did you know limburger is conductive
Some of the first batteries were made out of limburger ,but to low of voltage. But long life.Till the mice discovers it .
The down side.
Is it ok to order some Whine wit da Cheez?
Didn't know about the Cheez. Now I do.
by ebuilder
Sep 23 2022 2:11pm
Forum: EBike Non-hub Motor Drives
Topic: BBS02 motor whine
Replies: 32
Views: 792

Re: BBS02 motor whine

The rotor swap result will be VERY interesting. If that's the cause, new rotors run $70 - 90 while a new motor core with rotor $130 - $150. I usually use the one-third $$ rule when deciding fix vs. new. If I can fix it for less than 1/3 the price of new, I'll go with a fix. I decided to wait a week...