Search found 89 matches

by EddySPalm
Dec 13 2018 2:52am
Forum: General Discussion
Topic: Adding pictures?
Replies: 161
Views: 254633

Re: Adding pictures?

Marty, thank you so much! BUT! I managed to send you the non resized version, crap! I'm gonna have another go at it... If you're still willing to help me. Edit: Just sent you another picture. I do just the same as you're syaing; resize to 800 width, save as, and so on... You'll see from the next pho...
by EddySPalm
Dec 12 2018 8:53am
Forum: General Discussion
Topic: Adding pictures?
Replies: 161
Views: 254633

Re: Adding pictures?

I understand that, though I was hoping that someone would understand what is wrong with the pictures as, like I said, I have done nothing differently from before. The pictures are taken with the same phone, uploaded to the same dropbox folder, resized to correct sizes etc. I guess the reason the ale...
by EddySPalm
Dec 12 2018 1:29am
Forum: General Discussion
Topic: Adding pictures?
Replies: 161
Views: 254633

Re: Adding pictures?

I have been trying to post photos by uploading from a folder on my computer lately, same way and same folder as always, but suddenly I get an error saying It was not possible to determine the dimensions of the image. Please verify that the URL you entered is correct. But I am not doing anything diff...
by EddySPalm
Dec 11 2018 2:37am
Forum: E-Scooter and Motorcycle General Discussion
Topic: Classis Vespa Smallframe to EV
Replies: 23
Views: 968

Re: Classis Vespa Smallframe to EV

Like I've said on PM, that's an absolutely stunning swingarm, and I can't wait to see how you get on from here!

Have you test fitted it into the chassis yet?
by EddySPalm
Oct 02 2018 2:36am
Forum: E-Scooter and Motorcycle General Discussion
Topic: Classis Vespa Smallframe to EV
Replies: 23
Views: 968

Re: Classis Vespa Smallframe to EV

Nice to see that you are progressing! The smallframe chassis has a reinforcement where the shock originally sits, so you will have to reinforce the opposite side too, to accommodate a 2nd shock. Also, the original location has an indent/pocket where the shock sits, which doesn't exist on the opposit...
by EddySPalm
Sep 20 2018 2:01am
Forum: E-Scooter and Motorcycle General Discussion
Topic: 1970 Vespa 50s electrification project
Replies: 104
Views: 10230

Re: 1970 Vespa 50s electrification project

Ohh and a little delayed bonus shot from the FLUKE IR thermocamera, showing maximum temp on the BMS during our 100A run. That's 56 degrees C.
IR_00835.jpg
IR_00835.jpg (74.46 KiB) Viewed 165 times
by EddySPalm
Sep 20 2018 1:57am
Forum: E-Scooter and Motorcycle General Discussion
Topic: 1970 Vespa 50s electrification project
Replies: 104
Views: 10230

Re: 1970 Vespa 50s electrification project

I reached a milestone today, and sent the swingarm in for final welding! I used last night to drill and file out a slot for the spherical bearing cup to be welded in, and I got it both further back and up than I thought I would, so super happy with that. The welder at my local machine shop said he w...
by EddySPalm
Sep 19 2018 12:53pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: 1970 Vespa 50s electrification project
Replies: 104
Views: 10230

Re: 1970 Vespa 50s electrification project

Btw my sections are from mild steel, 355MPa yield, all 2mm thick.

The front is 40mm round tubing
The middle pieces are 40mm square, and
The rear pieces are 40x20mm rectangular.
by EddySPalm
Sep 19 2018 12:49pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: 1970 Vespa 50s electrification project
Replies: 104
Views: 10230

Re: 1970 Vespa 50s electrification project

Hi, how did you determine the material and thickness requirement for your swing arm? What steel and thickness did you use? I'm building one right now, and I think I'm building a tank. :oops: I honest to god started with a 10mm thick 80mm wide flat section of steel. photo_2018-09-19_17-43-37.jpg If ...
by EddySPalm
Sep 17 2018 4:06pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: 1970 Vespa 50s electrification project
Replies: 104
Views: 10230

Re: 1970 Vespa 50s electrification project

Thanks, The hole will either be where the mark is, and the bracket on the shock remade, or the hole will be higher up, like you say, to accommodate the current bracket. The latter will bring on some issues with the bearing cup being too large of a diameter to fit through the 40mm square profile with...
by EddySPalm
Sep 17 2018 2:56am
Forum: E-Scooter and Motorcycle General Discussion
Topic: Classis Vespa Smallframe to EV
Replies: 23
Views: 968

Re: Classis Vespa Smallframe to EV

So nice to see another Vespa/Smallie conversion thread! And straight off the bat, that throttle adapter you found is so much nice than the one I bought, and broke, and never got around to fix :D Just ordered one, thanks! I am extremely curious about how the rear braking will work out on this. it say...
by EddySPalm
Sep 17 2018 2:27am
Forum: E-Scooter and Motorcycle General Discussion
Topic: 1970 Vespa 50s electrification project
Replies: 104
Views: 10230

Re: 1970 Vespa 50s electrification project

Alright, this is where I am at right now: - I had my battery pack tested at my brothers' works' lab, where it performed like expected: I was warned that my cells are not fit for any high currents, maybe not even at their rated cont. Amps (10A per cell). What we saw was that at 70A/4000W, they were d...
by EddySPalm
May 11 2018 1:46pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: 1970 Vespa 50s electrification project
Replies: 104
Views: 10230

Re: 1970 Vespa 50s electrification project

Actually, when I look at my last update I see that I have actually made some progress since that. I'll get some pictures up when I'm near a computer!
by EddySPalm
May 11 2018 1:44pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: 1970 Vespa 50s electrification project
Replies: 104
Views: 10230

Re: 1970 Vespa 50s electrification project

Wow, has it been 1 year and 4 months already.. Actually I haven't gotten much further. I have tested the battery pack on a huge power supply at my brothers workplace. The batteries did fine, but the BMS popped a FET. I have also been at a standstill on the mechanical side, simply due to life catchin...
by EddySPalm
Mar 01 2018 4:54pm
Forum: Battery Technology
Topic: 150A BMS "blown" at 110A during lab test. Video attached. What next?
Replies: 12
Views: 768

Re: 150A BMS "blown" at 110A during lab test. Video attached. What next?

Alright, so good news in the sense that I could replace the fet and possibly live happily ever after, though bad news in the sense that something might have gone wrong that I am not in control over. I can monitor the total voltage sag, like in the video, but not across every series connection. I mig...
by EddySPalm
Mar 01 2018 6:01am
Forum: Battery Technology
Topic: 150A BMS "blown" at 110A during lab test. Video attached. What next?
Replies: 12
Views: 768

Re: 150A BMS "blown" at 110A during lab test. Video attached. What next?

Thanks for all your answers, and thank you fechter for posting the data sheet! I don't understand too much of what the data sheet says, but I started studying the "safe operation area" on page 4.. At 50-60V and 110A/8 FET's = roughly 14A pr FET, is this not borderline "not safe"?? I mean, it looks t...
by EddySPalm
Feb 28 2018 9:43am
Forum: Battery Technology
Topic: A little nervous I've underengineered my pack, thoughts?
Replies: 20
Views: 1928

Re: A little nervous I've underengineered my pack, thoughts?

First test done. We had to quit the test when the BMS died on us at 110A. Unfortunately I have not made nice graphs like Henrik at lygte-info.dk does, but I have notes, pictures and videos. What I intended to test: 1. Low load over enough time to prove the functionality of the battery pack, and to f...
by EddySPalm
Feb 28 2018 8:41am
Forum: Battery Technology
Topic: 150A BMS "blown" at 110A during lab test. Video attached. What next?
Replies: 12
Views: 768

150A BMS "blown" at 110A during lab test. Video attached. What next?

Hi, I bought the only 16s BMS I could find that was supposed to handle 150A continuous, and the other day I was testing my battery pack for temperature rise, only to find out that the batteries did fine, but the BMS did not! After roughly 1/2 minute (1 minute 25seconds into the video) at 110A we hea...
by EddySPalm
Dec 20 2017 4:45pm
Forum: E-Vehicles General Discussion
Topic: Demagnetized magnet for electronic throttle, help!
Replies: 13
Views: 1085

Re: Demagnetized magnet for electronic throttle, help!

I actually completely forgot you mentioned that somewhere higher up in this thread, that might be my solution! And I'll check out those sellers too, thanks :-)
by EddySPalm
Dec 11 2017 3:52pm
Forum: E-Vehicles General Discussion
Topic: Demagnetized magnet for electronic throttle, help!
Replies: 13
Views: 1085

Re: Demagnetized magnet for electronic throttle, help!

Got the new magnets, and would you know they're magnetized the wrong way...

Anyway, I got to test the old magnet and it is completely dead, more or less.

So now the search becomes harder than ever, with the magnets having to be magnetized the right way in addition to being the right dimensions...
by EddySPalm
Nov 29 2017 10:05am
Forum: E-Scooter and Motorcycle General Discussion
Topic: Ebike scooter project QS 4kw V3 72v, Kelly KEB72601
Replies: 131
Views: 18378

Re: Ebike scooter project QS 4kw V3 72v, Kelly KEB72601

Thanks a lot for your answer Smeagol :) It gives me a great place to start, and since my battery capacity currentwise will be close to yours, it might even be a good starting point for me. So what percentages did you end up using then, to restrict the current to 60amp cont. and 85amp peak? I will ha...
by EddySPalm
Nov 29 2017 2:29am
Forum: E-Scooter and Motorcycle General Discussion
Topic: Ebike scooter project QS 4kw V3 72v, Kelly KEB72601
Replies: 131
Views: 18378

Re: Ebike scooter project QS 4kw V3 72v, Kelly KEB72601

Nice! It's really good to see you're on the road and enjoying it. I will be in the midst of programming my exact same motor and controller in a few months and might need some of your help... :oops: Dare I ask you what total battery capacity you ended up with, and do you have an impression of what so...
by EddySPalm
Nov 29 2017 2:08am
Forum: E-Vehicles General Discussion
Topic: Demagnetized magnet for electronic throttle, help!
Replies: 13
Views: 1085

Re: Demagnetized magnet for electronic throttle, help!

I would test it the way it is and see what happens. Soldering temperature is for sure hot enough to demagnetize them though. The orientation of the hall sensor matters. If you have a picture of the other half, we can be more certain about things. I will definitely get up a photo of that. Thanks a l...
by EddySPalm
Nov 29 2017 2:02am
Forum: E-Vehicles General Discussion
Topic: Demagnetized magnet for electronic throttle, help!
Replies: 13
Views: 1085

Re: Demagnetized magnet for electronic throttle, help!

I was desoldering the cable from the brass piece that the magnet is glued to, so temp was well over 1800 degrees C... :shock: 1800 C :shock: ...i highly doubt that temp, ...but if so, im surprised there is anything left ! Yeah, well... Did I mention it was silver soldered... So somewhere way above ...