Paradad

Yes, I've heard it's very good So more specifically - anyone recommend a site that gives an overview of current e-bike tech? Where is the standard for wiring for example??

Thought I'd also note that the wheel parts have all finally arrived and I have built the Q70 motor into a Sun CR18 rim as suggested by VFR. 120mm spokes fit perfectly using a cross 1 lacing pattern.

Just want ed to pick up on the point of wiring - it's incredibly unsual for even a ompany to stick to standards, very refreshing to know the ebike motors are sticking to a common standard. It has highlighted how little INkow about how themotoros actually work - can anyone recommend a site and can go to read and educate myself?

Good to know, cheers

Thanks both - I'll take a look. That's the problem these days - so much stuff looks okay on the screen but the reality is all too often really poor straight to landfill..!

Yes, fair point. I've only bought them twice - one set was definitley much better quality than the others...

good call, thank you!

Good information, thank you! I think that's part of the problem - a lot of the DIY e'bike connectors are not really heavy duty DC conectors at all. I take it the old DIN connectors weren't up to the job? So anyway, a bit of context , the wider problem I'm trying to solve is I have a very nice bike that is getting wrecked by hanging a large battery from velcro straps on the frame. That will be okay for short occasional use but I use it daily for 50mile round trips including a few miles along rock and loose rock. The battery bouncing around on its straps is trashing the frame finish. I've decided to take the bike out of action while I figure out how to mount the battery and redo the wiring. I plan to build a composite lift on/off lockable case. That's why the connector needs to be up to the mark. So far as the XT connectors are concerned - they're great for what they do and definitely (IMO) the best of what I've seen so far, but still a long way from "job done". Anyway, no offence taken. I may eventually abandon the search and go with the XT connectors, but not until I've had a good look at this from a few angles. There are things out there, at a price (check out mouser.co.uk, molex and rs-online), so I'm not giving up yet! Ideas / thoughts / experience on connectors still welcome please!

Sorry Pete, I'm working back up the stack! Here's a photo....

Hi, if I can unpack that a bit, what you're saying is that all motors from all manufacturers use the same wiring layout? Same number of hall sensors / wiring layouts and colour coding? If the connectors (when they arrive) are also standard then this may be a moot point but I'm genning up before the build. Could you point me to somewhere where the wiring is described ? I've not found anything .

So my Q70 arrived this week. The details provided by BMSBattery have been ever so slightly less than useful! Does anyone have a colour coded wiring diagram? It's even possible the wiring is the same as others "Q" series motors I guess. Any thoughts anyone?

I'm going to try to revive this a little as I think connectors and wiring are one of the hardest things to do well in a DIY eBike. I've started to refine what I'm looking for... Up to 50A DC, Waterproof (Sealed), Female panel mount,and over 500 mating cycles min. The choice of connectors seems remarkably thin on the ground. Plenty of products from China with no standards or electrical specifications provided! The xt60 and xt90 are great in their way but not sufficiently robust to be built into a case. Here's an example from BMS Battery. Typically thin on the specifications but at £9 plus £37 postage I'm still looking ! https://bmsbattery.com/home/880-a-pair-50a-waterproof-connector-2-1-5-pins.html Any thoughts anyone? I'm also interested in hearing about high current switches too...

Hi Kirstin, it's for both, so high current capability needed thanks both for the posts. I haven't seen surface mount before. Do you know of other formats that could work? I've had XT plugs deform and crack in the past so I'm on the lookout for something a bit more durable to fit into the case. Any thoughts? Perhaps metal connectors? I've seena lot but nothing that will handle the power needed!

Hi, I'm looking for advice on waterproof connectors suitable for mounting into a hard battery case. I am planning on building an epoxy composite case to hold the battery and need to mount a connector to the surface of the case for ease of use when moving the battery on/off the bike. I'm looking for a surface mount (i.e. female connector on the case with a dust cap). Can anyone recommend a suitable fitting? All I've found is Andersons and XT60 / XT90 connectors which aren't really suitable for surface mounting. Has anyone out there been there done that and can point me in the right direction?

I do like the look of that softpack [mention=12956]wheeliepete[/mention] !

Oh now you've almost made me wish I'd held back a little longer! However, I'm commited now. It's a fair point about the weight for carrying - and partly with that in mind I was considering a set of two (or more) smaller batteries which could be very effective (I think the bottle with that grey case from rockbros looks like a great combo). However - I very rarely carry my Brompton anywhere. It lives in the back of the car and comes out when I get to the city limits so I wanted enough power to get in and out with a bit to spare. I *think* it'll look Okay but I'll post some photos later and let the pedelecs community judge ! The key factors for me were then: - range (based on 80% charge) - locakable if I have to leave the bike in town - frame fixings and case part of the package - low impact on the overall form factor of the bike when folded Others will surely have different requirements and I really hope we get to see different builds coming out and see how they get on. Especially some more powerful rear hub designs...

[mention=24280]TomCC[/mention] - you've stayed very quiet So, inspired by this thread I've decided to go for a 36v 10AH Hailong battery and the Cute Q70. It won't be as pretty as some but I think will work well enough on the cross bar and shouldn't interfere with folding while also giving me the longer range I'm looking for. [mention=23760]Collis123[/mention] I think 48v may be too much for this wee motor & personally I'd be concerned about over heating. My main aim for this is to avoid sweatyness rather than increase speed, so 36v it is. I'll let you know how I get on in a few weeks from now...

Hi [mention=23760]Collis123[/mention] , got be honest, haven't done it for years. I used to find wheel building tough but satisfying.. I'd only do it now if i couldn't buy what i need ready made. In this instance I think I'll do it to use the q70 - and to be sure of a good quality front wheel. In this case the kits on ebay are just too much of an unknown quantity for me. I know there will be much swearing ahead if I get started.... [mention=4809]vfr400[/mention] - yup, good point. bag not needed but i think is looks pretty& is also convenient option for carrying the battery about off the bike. That said I am looking at alternative batteries. I share concern about range, so I'm still lookin at that. The rest of it looks okay to me. Im tempted to start hitting the "sod it" buttons and start ordering soon. That said I just found a thread on this forum of interest. Same idea using a fatter motor: https://www.pedelecs.co.uk/forum/threads/wheel-building-tongxin-in-brompton-wheel.5090/page-2#post-65911

So let's look at a recipe for about 10km range : Q70 - MOTOR (thanks Tom) KT sinewave controller with brake cutoffs and PAS - CONTROLLER KT LCD4 Screen - small and neat - SCREEN (Thanks [mention=4809]vfr400[/mention] ) Small 36v 5.8 Ah bottle battery - BATTERY (ditto!) Bag for the battery - BAG Spokes Calculator Rim This post has got me interested & I'm thinking of putting this together - maybe with a bigger battery but I think this would give a pretty and useable set up. Thoughts?

@vfr - yup. Gotcha. I thought the bottle battery included the controller. It doesn't so that makes things easier. [mention=23760]Collis123[/mention] - you'll at least need to spread the forks out to fit the q85. It doesn't mention wheel diameter so who knows but going on previous comments it doesn't look promising

Pat- apologies, just saw your post. Thank you. The swytch looks really good. It'd be really interesting to see how you get on withit.

How do you know the bottle battery from aliexpress works with the KTLCD4? It looks great in principle but I don't see it as s package and would love to know how to be sure they're compatible. What'syour thoughts? I'm thinking I'll put this package together

Fair enough

[mention=4809]vfr400[/mention] , going back to the question about compatibility, this all looks fine to me, based on the power demands of the system but how can you check compatibility for components like the LCD monitor ? Is it a question of checking the connectors (easier said than done given they often don't get shown in pics). I asusme there more to it than that. Any thoughts?

Thanks guys - yes I'd seen a few comments about the comms