Search found 156 matches

by Darren2018
Jan 01 2021 8:08pm
Forum: Items for Sale - New
Topic: EBC-A20 Battery discharge cycle life tester - SOLD
Replies: 4
Views: 205

Re: EBC-A20 Battery discharge cycle life tester

John wouldn't you be better off buying one from Aliexpress? Any potential duty or shipping would make it cheaper to buy from China.
by Darren2018
Jan 01 2021 5:17pm
Forum: Items for Sale - New
Topic: EBC-A20 Battery discharge cycle life tester - SOLD
Replies: 4
Views: 205

EBC-A20 Battery discharge cycle life tester - SOLD

EBC-A20 - £55 delivered within the UK - SOLD 20A discharge (85W max) 5A charge (18V 60W max) Cycle testing via windows software. IMG_4431.JPG IMG_4432.JPG Manufactures specifications: Power supply mode: DC19V-20V, current above 3.5A Voltage setting: 0.00-30.00V, minimum step 0.01V (maximum voltage i...
by Darren2018
Dec 23 2020 12:36pm
Forum: EBike Technical
Topic: How to get the most power out of a QS205 50H?
Replies: 48
Views: 1755

Re: How to get the most power out of a QS205 50H?

Wingdings are a very touchy topic. In my experience, it really depends on how you ride. People want to have the ability to launch hard from a stop, but most of the time nobody is doing this consistently (unless you're racing or riding extremely technical trails). The majority of people are more imp...
by Darren2018
Dec 21 2020 12:24pm
Forum: EBike Technical
Topic: How to get the most power out of a QS205 50H?
Replies: 48
Views: 1755

Re: How to get the most power out of a QS205 50H?

The battery compartment on my frame is best suited for 22S14P and the Nucular is only warranted to 90V so I went with the 3.5T. If I was able to use 24S at 4.2V I would have chosen a 4T but at 90V 300bA 500pA you can max out the 3.5T and have lots of mid range power especially once you factor in fi...
by Darren2018
Dec 20 2020 11:38pm
Forum: EBike Technical
Topic: How to get the most power out of a QS205 50H?
Replies: 48
Views: 1755

Re: How to get the most power out of a QS205 50H?

The battery compartment on my frame is best suited for 22S14P and the Nucular is only warranted to 90V so I went with the 3.5T. If I was able to use 24S at 4.2V I would have chosen a 4T but at 90V 300bA 500pA you can max out the 3.5T and have lots of mid range power especially once you factor in fie...
by Darren2018
Dec 16 2020 6:41pm
Forum: EBike Technical
Topic: How to get the most power out of a QS205 50H?
Replies: 48
Views: 1755

Re: How to get the most power out of a QS205 50H?

I am wondering how to get the most power out of this setup: QS205 50H (kV not decided) Nucular 24F at 300bA/500pA 25" total wheel size 10-50mph I know the basic theory is to condense the motors available power into a useful rpm range but as we all know this is not as easy as it sounds when the...
by Darren2018
Dec 02 2020 7:10am
Forum: EBike General Discussion
Topic: QS205 rim and RCP2S 265mm 750lb
Replies: 11
Views: 356

Re: QS205 rim and RCP2S 265mm 750lb

I think I just need something that won't break. I never really thought it would be a problem... Illusions. I too, wanted something that won’t break, but my first priorities are performance and safety. So I worked on building power and speed until I got the performance that I wanted. Then I worked o...
by Darren2018
Dec 01 2020 7:59pm
Forum: EBike General Discussion
Topic: QS205 rim and RCP2S 265mm 750lb
Replies: 11
Views: 356

Re: QS205 rim and RCP2S 265mm 750lb

I think I just need something that won't break. I never really thought it would be a problem until I heard of rims not being strong enough. Anyway I appreciate your opinion, now I just need to sort out a rear shock, front fork, rims, spokes and tyres.
by Darren2018
Dec 01 2020 12:53pm
Forum: EBike General Discussion
Topic: QS205 rim and RCP2S 265mm 750lb
Replies: 11
Views: 356

Re: QS205 rim and RCP2S 265mm 750lb

Excel trial rims are the very best, but not for the kind of money that people usually spend to lace a hub motor. Do QS have any options for other rims as it would be much easier to buy the motor from them and also get them to lace it up into a wheel. What rims do you personally recommend? Very few ...
by Darren2018
Dec 01 2020 7:11am
Forum: EBike General Discussion
Topic: QS205 rim and RCP2S 265mm 750lb
Replies: 11
Views: 356

Re: QS205 rim and RCP2S 265mm 750lb

MadRhino wrote:
Dec 01 2020 12:01am
Excel trial rims are the very best, but not for the kind of money that people usually spend to lace a hub motor.
Do QS have any options for other rims as it would be much easier to buy the motor from them and also get them to lace it up into a wheel. What rims do you personally recommend?
by Darren2018
Dec 01 2020 7:07am
Forum: EBike General Discussion
Topic: QS205 rim and RCP2S 265mm 750lb
Replies: 11
Views: 356

Re: QS205 rim and RCP2S 265mm 750lb

Have you heard of SM Pro? I think I read on here that they were also good and they are located in the UK which is convenient as they can also build the wheels. I found this when I googled them: Screen Shot 2020-12-01 at 11.55.30 am.png Do you have any advise on spokes and lace pattern? Also is Tubli...
by Darren2018
Nov 30 2020 4:31pm
Forum: EBike General Discussion
Topic: QS205 rim and RCP2S 265mm 750lb
Replies: 11
Views: 356

Re: QS205 rim and RCP2S 265mm 750lb

I got a set of 18" x 1 .6... I can do 80$ ea shipped. Look for Akront. Akronts are the bomb ( and Spanish, so you may find some... ) If I had the money I'd get a 2.5 by 18 36 hole and a 1.6x19 36 hole in chrome Akront aluminium. https://www.ebay.com/sch/m.html?_odkw=&_ssn=valtermotousa&...
by Darren2018
Nov 30 2020 4:19pm
Forum: Items for Sale - New
Topic: New R4850G2 3000W Rectifiers - SOLD
Replies: 0
Views: 202

New R4850G2 3000W Rectifiers - SOLD

I have 2 brand new R4850G2 3000w rectifiers for sale. These are hard to find brand new as most are either second hand with missing or broken parts or used but in good condition. The G2 version is both 96%+ efficient and less than 2KG. These make extremely compact and powerful power supplies or charg...
by Darren2018
Nov 30 2020 8:35am
Forum: EBike General Discussion
Topic: QS205 rim and RCP2S 265mm 750lb
Replies: 11
Views: 356

QS205 rim and RCP2S 265mm 750lb

Does anyone know of a strong 18x1.85 or 18x2.15 that is not too expensive and is available from the UK? I have seen lots of posts regarding bent rims and I don't really want to have to replace it if I don't need to. Also would a RCPS2 265mm with a 750lb spring be better than a 240mm with a 550lb spr...
by Darren2018
Nov 25 2020 2:02pm
Forum: Battery Technology
Topic: "Copper/nickel sandwich" buses for series connections
Replies: 38
Views: 3181

Re:

Yes letting internal heat build up as a result of high C-rate discharges for longer periods is inherently damaging to longevity. Designing heroic cooling measures should not be required. The ideal is raising Ah capacity until there is no detectable temp rise. This is not really possible when weight...
by Darren2018
Nov 25 2020 1:44pm
Forum: Battery Technology
Topic: "Copper/nickel sandwich" buses for series connections
Replies: 38
Views: 3181

Re: "Copper/nickel sandwich" buses for series connections

I haven't really investigated materials with good thermal properties that were not conductive. It's a worthwhile study, but the frequent suggestion is using high-amp cells so they ruin cool at normal loads, and also having a pack big enough to easily supply the normal amp work-loads. I don't think ...
by Darren2018
Nov 25 2020 7:41am
Forum: Battery Technology
Topic: "Copper/nickel sandwich" buses for series connections
Replies: 38
Views: 3181

Re: "Copper/nickel sandwich" buses for series connections

The 0.15 copper sheet is what I am most interested in. It can handle the highest currents coming from 21700 cells. Even if 0.10mm copper works for the common 18650 cells, if there is a way to get the 0.15 copper to work on cylindrical cells, why not not use 0.15 on everything? It makes a great heat...
by Darren2018
Nov 25 2020 7:39am
Forum: Battery Technology
Topic: "Copper/nickel sandwich" buses for series connections
Replies: 38
Views: 3181

Re: "Copper/nickel sandwich" buses for series connections

The 0.15 copper sheet is what I am most interested in. It can handle the highest currents coming from 21700 cells. Even if 0.10mm copper works for the common 18650 cells, if there is a way to get the 0.15 copper to work on cylindrical cells, why not not use 0.15 on everything? It makes a great heat...
by Darren2018
Nov 23 2020 4:09am
Forum: Battery Technology
Topic: "Copper/nickel sandwich" buses for series connections
Replies: 38
Views: 3181

Re: "Copper/nickel sandwich" buses for series connections

From Rio Cole on Facebook. 0.10mm copper, 0.15 nickel-plated steel . kWeld setting 60 joules. Rio states that the steel ribbon welds easier with a lower setting compared to pure nickel ribbon. This makes sense because the higher resistance of steel would get hotter per the same amount of amps at th...
by Darren2018
Nov 19 2020 5:25am
Forum: Items for Sale - New
Topic: Nucular electronics - complete kit for ev! [beta]
Replies: 1541
Views: 167624

Re: Nucular electronics - complete kit for ev! [beta]

BAC or Nucular are probably the best controllers available. BAC look like they have the more professional solution but Nucular has far more useful features for the average consumer. When you buy the Nucular you are buying more than a controller you are actually investing in an eco system, you will g...
by Darren2018
Nov 18 2020 12:25pm
Forum: EBike Technical
Topic: How to get the most power out of a QS205 50H?
Replies: 48
Views: 1755

Re: How to get the most power out of a QS205 50H?

Having built 8 of these bikes in various forms and modified a couple of Sur-Rons for friends I am only offering my own experience. The 1st one I built cost in excess of £7000+ due to being a development bike (including lipos @ 126V 35+kw) I'm waiting for parts to make 3 more QS205 4t 84v @150ba -30...
by Darren2018
Nov 18 2020 6:33am
Forum: Items for Sale - New
Topic: Nucular electronics - complete kit for ev! [beta]
Replies: 1541
Views: 167624

Re: Nucular electronics - complete kit for ev! [beta]

Could anyone from the Nucular team tell me when uLight will be ready? When can we expect the 24S BMS system? And most importantly when can I expect my 1350 24F order to be ready to ship? 8)
by Darren2018
Nov 18 2020 6:28am
Forum: Items for Sale - New
Topic: Nucular electronics - complete kit for ev! [beta]
Replies: 1541
Views: 167624

Re: Nucular electronics - complete kit for ev! [beta]

FW is the weakening of the magnetic field of the motor at high speed. It only increases the rotational speed when maximum rpm is reached. The magnetic field being lower, the motor turns faster because it turns freely without resistance, but this implies a drop in torque. It is the same as increasin...
by Darren2018
Nov 18 2020 5:45am
Forum: Items for Sale - New
Topic: Nucular electronics - complete kit for ev! [beta]
Replies: 1541
Views: 167624

Re: Nucular electronics - complete kit for ev! [beta]

I am seriously surprised that nobody has asked this question before. :confused: Or you could just use field weakening... I have been trying to understand if field weakening is a true replacement for kV but I can't find or get an answer from anyone. Does FW really make the motor behave like one with...