Search found 2010 matches

by Rassy
Nov 30 2019 9:27pm
Forum: E-Bike Technical
Topic: Should I fuse my battery?
Replies: 11
Views: 834

Re: Should I fuse my battery?

I always use a 48V DC circuit breaker at the battery. It also serves as a handy on/off switch and handles the external spark when you hook the battery up to the controller which happens as the capacitor draws a burst of current. And thus there is no need for any anti spark circuit to keep from damag...
by Rassy
Oct 17 2019 10:49am
Forum: E-Bike Non-hub Motor Drives
Topic: DIY Fix for BBS02/BBSHD Pedal/Throttle Issue
Replies: 113
Views: 20901

Re: DIY Fix for BBS02/BBSHD Pedal/Throttle Issue

Thanks P913. I think you may have found a nice partial solution to the Pedal/Throttle issue. In reading your post and looking at your firmware settings I wonder what would happen if instead of setting the Designated Assist Level to 0 in the Pedal Assist section you set it to 0 just in the Throttle H...
by Rassy
Oct 13 2019 12:55pm
Forum: E-Bike Non-hub Motor Drives
Topic: DIY Fix for BBS02/BBSHD Pedal/Throttle Issue
Replies: 113
Views: 20901

Re: DIY Fix for BBS02/BBSHD Pedal/Throttle Issue

Thanks eBlur, I updated the first post of this thread as you suggested.
by Rassy
Oct 10 2019 11:28am
Forum: E-Bike Non-hub Motor Drives
Topic: DIY Fix for BBS02/BBSHD Pedal/Throttle Issue
Replies: 113
Views: 20901

Re: DIY Fix for BBS02/BBSHD Pedal/Throttle Issue

I did some edits on bench testing in my previous post. Maybe this will help once you get the electronics sorted out.
by Rassy
Oct 10 2019 12:18am
Forum: E-Bike Non-hub Motor Drives
Topic: DIY Fix for BBS02/BBSHD Pedal/Throttle Issue
Replies: 113
Views: 20901

Re: DIY Fix for BBS02/BBSHD Pedal/Throttle Issue

I think you need to be able to "pedal" in order to test the "fix", because the fix makes the throttle dominant instead of pedaling being dominant. As far as how the throttle works on the bench I found it was very hard to tell the difference between a partial throttle setting and a full throttle sett...
by Rassy
Oct 06 2019 12:49pm
Forum: E-Bike Non-hub Motor Drives
Topic: DIY Fix for BBS02/BBSHD Pedal/Throttle Issue
Replies: 113
Views: 20901

Re: DIY Fix for BBS02/BBSHD Pedal/Throttle Issue

Glad you found this thread, eBlur. The technical expert is Fechter, and if he doesn't see your post here you might send him a private message. Good luck with your repair. Even though I have an older controller that works correctly from the factory, I just left it on the shelf and continue to use the...
by Rassy
Sep 30 2019 1:02pm
Forum: E-Bike General Discussion
Topic: Speedometer / Odometer 27.5 Inch tires
Replies: 2
Views: 190

Re: Speedometer / Odometer 27.5 Inch tires

The DPC14 display allows entering wheel circumference from 51cm through 255cm in addition to the basic inch diameters Bafang uses.
by Rassy
Sep 20 2019 10:08pm
Forum: Battery Technology
Topic: Charging two batteries with one charger
Replies: 9
Views: 440

Re: Charging two batteries with one charger

It seems you haven't given us sufficient information to help you, but the answer may already be present. If the two batteries are not wired together, then you must be using one at a time and switching to the other when the first one runs down. If this is the case you have two choices, namely first c...
by Rassy
Sep 18 2019 8:22pm
Forum: Battery Technology
Topic: Charging two batteries with one charger
Replies: 9
Views: 440

Re: Charging two batteries with one charger

I think there are some sound reasons that you should not charge both batteries in parallel, but it probably depends on the battery chemistry and how the battery and charger work together. But the real point of my response here is what are you trying to gain? Charging both batteries at the same time ...
by Rassy
Aug 15 2019 10:17am
Forum: Motor Technology
Topic: Why would a controller cut out going uphill? (probably not battery related)
Replies: 24
Views: 869

Re: Why would a controller cut out going uphill? (probably not battery related)

This has been a good discussion and I don't think you really have an issue now that you understand when it happens. Just like when you drive a car you don't go full throttle when you take off and on your bike when you go full throttle taking off up a hill all the juice that isn't turning the wheel i...
by Rassy
Aug 12 2019 9:50pm
Forum: Motor Technology
Topic: Why would a controller cut out going uphill? (probably not battery related)
Replies: 24
Views: 869

Re: Why would a controller cut out going uphill? (probably not battery related)

Everything I see in your thread says the controller is reacting to overheating, or at least what it thinks is overheating. My first hub motors, even before being on ES, so a long time ago, were brushed motors (BD36) and they had a real small controller that shut down if pushed too hard on a hill. Th...
by Rassy
Jul 31 2019 9:50pm
Forum: E-Vehicles General Discussion
Topic: Running two 24v motors off one battery
Replies: 4
Views: 629

Re: Running two 24v motors off one battery

Some of the above info can be misleading. From actual experience with two wheel pusher trailers you can definitely run two motors from two controllers with one throttle and one battery pack. There will be no need for a differential, etc. as the "independent" motors will let either one speed up or sl...
by Rassy
Jul 27 2019 4:59pm
Forum: E-Bike Non-hub Motor Drives
Topic: DIY Fix for BBS02/BBSHD Pedal/Throttle Issue
Replies: 113
Views: 20901

Re: DIY Fix for BBS02/BBSHD Pedal/Throttle Issue

Hi LowKeeRider, glad to hear you are happy with your BBS02 after updating some of the parameters. However, there is nothing in your post to indicate that you have tested or corrected the problem that was addressed in the first post of this thread. No offense meant, but I would be happy to have you a...
by Rassy
Jul 13 2019 4:10pm
Forum: E-Bike Non-hub Motor Drives
Topic: Mid drive using hub motor
Replies: 20
Views: 1294

Re: Mid drive using hub motor

I set up a couple of tadpole trikes as mid-drives using hub motors a few years back. The first one started with a Nexus 8 transmission, which was replaced with a NuVinci auto shift. Both trikes worked great, but were heavy, and the NuVinci was quite inefficient compared to a derailleur system. I wou...
by Rassy
Jul 04 2019 4:56pm
Forum: Battery Technology
Topic: 1kwh pack recommendation
Replies: 14
Views: 861

Re: 1kwh pack recommendation

My older Ping battery has no specification information on it, but my newer one (over 5 years old) has a label on it that says "Lithium Battery Pack", "MODEL 20V 4400mAh Battery", and "Date of production: 201505", along with other general info. It does not say Ping or Ping Battery, etc on it. The 20V...
by Rassy
Jul 03 2019 7:44pm
Forum: Battery Technology
Topic: 1kwh pack recommendation
Replies: 14
Views: 861

Re: 1kwh pack recommendation

Those "Topband" cells do look interesting. So if you put 12 of them in series you would have a nominal 36V 25AH battery. In your estimate did you include shipping, a BMS, and a charger? If you do make your own battery from these cells please document the details. I could see making a 48V 10AH batter...
by Rassy
Jul 01 2019 8:00pm
Forum: Battery Technology
Topic: 1kwh pack recommendation
Replies: 14
Views: 861

Re: 1kwh pack recommendation

A Ping LiFeP04 48V 20AH pack is made up from 64 5AH 3V prismatic cells 4P16S format. So it's still sort of mind boggling to think about, but I've personally purchased 7 of his batteries for myself and friends and never gone inside any of them except for a couple of BMS replacements. All except 1 are...
by Rassy
Jun 30 2019 11:05pm
Forum: E-Bike Non-hub Motor Drives
Topic: Mid drive kit on Babboe City cargo bike?
Replies: 8
Views: 780

Re: Mid drive kit on Babboe City cargo bike?

I think the bike would be a good candidate for a BBS02 or BBSHD. A BBS02 would give you plenty of assist on hills in the lower gears, or a BBSHD if you need more speed going up steep hills. I put a little bike together for my sister five years ago with a BBS02 and a Nexus 8 IGH. It's a great combina...
by Rassy
Jun 29 2019 10:44pm
Forum: Battery Technology
Topic: 1kwh pack recommendation
Replies: 14
Views: 861

Re: 1kwh pack recommendation

For what it's worth, I like the relative safety of the LiFeP04 as compared to some of the other battery choices. If I was faced with your decision I would probably check out a 48V 20AH (about 1000WH) from Ping. The weight would be about 20 pounds. https://www.pingbattery.com/servlet/the-2/lifepo4-li...
by Rassy
Jun 29 2019 5:43pm
Forum: Motor Technology
Topic: Bafang BBS01 Error 30 -> Controller broken?
Replies: 3
Views: 430

Re: Bafang BBS01 Error 30 -> Controller broken?

Yes, on an early BBS02 4 years ago. Did a test similar to what you did and eventually replaced the controller, which I had to purchase since it was out of warranty. That BBS02 is still in service with no further problems. Good luck with getting it fixed. If you can get them to send you a new control...
by Rassy
Jun 27 2019 12:27pm
Forum: E-Bike Technical
Topic: Issues with Bafang BBSHD + 14S9P battery pack from Em3Ev
Replies: 11
Views: 664

Re: Issues with Bafang BBSHD + 14S9P battery pack from Em3Ev

I have never had a DPC18, so probably not much help, but here is a little summary on some other display units reaction to error code 21, and of course the speed and any speed limits do not work on any units when error code 21 occurs: C961: BBS02 still runs, but is stuck in the current PAS level unti...
by Rassy
Jun 27 2019 10:34am
Forum: E-Bike Technical
Topic: Issues with Bafang BBSHD + 14S9P battery pack from Em3Ev
Replies: 11
Views: 664

Re: Issues with BBSHD + 14S9P battery pack from Em3Ev

In my experience (all with BBS02) how the error 21 (speed sensor problem) affects the system depends on the display that is installed. Some displays quit functioning, but still allow you to continue riding in whatever PAS level you were at, and also allow use of the throttle. Others shut the system ...
by Rassy
Jun 26 2019 6:34pm
Forum: E-Bike Non-hub Motor Drives
Topic: Best BBSHD programming profile for PAS use.
Replies: 1
Views: 444

Re: Best BBSHD programming profile for PAS use.

I think the best profile is the one that suits your needs the best. Many of the canned profiles are designed for high speeds and fast acceleration. All my experience is with 48V BBS02 systems, but setting it up to your preference is the same. I also ride with PAS on multi-purpose paths most of the t...
by Rassy
Jun 22 2019 8:42pm
Forum: General Discussion
Topic: 2 stroke gas/350w front hub full Regen project
Replies: 14
Views: 1060

Re: 2 stroke gas/350w front hub full Regen project

This guy just posted this month also, with much the same issue. Responses here may be useful to you:

https://www.endless-sphere.com/forums/v ... 2&t=100733
by Rassy
Jun 21 2019 2:36pm
Forum: General Discussion
Topic: HELP: Tongsheng tsdz2 - stuck halfway in bottom bracket
Replies: 3
Views: 527

Re: HELP: Tongsheng tsdz2 - stuck halfway in bottom bracket

Had a similar issue installing a BBS02 on an aluminum frame bike. There was a ridge inside the bottom bracket right in the middle. First I reamed the ridge out with a hole saw that fit within the threads of the bottom bracket and then used a round file to finish the job so that the BBS02 would slide...