Search found 1848 matches

by ridethelightning
Aug 18 2019 7:11am
Forum: Motor Technology
Topic: Hubmonster teardown
Replies: 44
Views: 3343

Re: Hubmonster teardown

just thought id add suggestion to make a list of good rims that could be adapted for hubmonster use. im looking for some just now as my hubmonsters came with rims that were not really usable. would be nice to be able to buy the stock rims new but id say id have a snowflakes chance these days. btw, s...
by ridethelightning
Jul 21 2019 3:49am
Forum: Battery Technology
Topic: mega copper battery spotwelder
Replies: 19
Views: 900

Re: mega copper battery spotwelder

com'n slowly but surely
just getting all the little things to happen to arrive at welding...feels like im climbing a mountain made of honey :D
by ridethelightning
Jul 17 2019 7:57am
Forum: Items for Sale - New
Topic: Nucular electronics - complete kit for ev! [beta]
Replies: 646
Views: 55209

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

I think optional potting is the way to go.
i would not like to pay postage to russia of 100usd if i knew i just had to replace a cap that had obviously popped.
but enough about potting, back to more interesting stuff :D
by ridethelightning
Jul 08 2019 2:47am
Forum: Battery Technology
Topic: mega copper battery spotwelder
Replies: 19
Views: 900

Re: mega copper battery spotwelder

so this is sort of but not really quite an update. i have now received a prebuilt power switch and pulse control board from a webshop in china, who was making these spotwelders. sp welder.JPG it looks very well built except for one easilly rectified detail- the bus bars that carry the current to the...
by ridethelightning
Jul 03 2019 2:25am
Forum: Motor Technology
Topic: Hubmonster teardown
Replies: 44
Views: 3343

Re: Hubmonster teardown

interesting post. the reason i started looking for hubmonsters is that i wanted to get a bigger motor, but had been consistently annoyed by the fact that all my bikes, using cromotors(several) qs205, crystalyte 5404, etc had all been great but when i wanted to push the amps to keep up to speed on th...
by ridethelightning
Jul 02 2019 7:24pm
Forum: Motor Technology
Topic: Hubmonster teardown
Replies: 44
Views: 3343

Re: Hubmonster teardown

NOTE: This is NOT a thread for selling anything...just pointing out that the motors exist and will get put up for sale elsewhere. This is midi-hubmonsters. Three in the pile plus one more I already have. Go look at my tear downs for the hubmonster and midi for comparison. Not quite as powerful as f...
by ridethelightning
Jun 28 2019 4:59am
Forum: Motor Technology
Topic: Ferrite as a stator material?
Replies: 20
Views: 2336

Re: Ferrite as a stator material?

subscribe
by ridethelightning
Jun 28 2019 12:12am
Forum: Motor Technology
Topic: Hubmonster teardown
Replies: 44
Views: 3343

Re: Hubmonster teardown

i think vectorix may have made an early version with a hubmonster but i havnt found one yet. another 2 for the list would be- x-treme xm4000li x-treme xm5000li both look to have full size hubmonsters. these are basically the rmartin again. seems like different "brands" in USA etc have just ordered f...
by ridethelightning
Jun 27 2019 11:52pm
Forum: Items for Sale - New
Topic: Ebike Hub Motor overheating cooling solution - HUBSINK OFFICIAL THREAD
Replies: 90
Views: 10878

Re: Ebike Hub Motor overheating cooling solution - HUBSINK OFFICIAL THREAD

i then did the same thing to the undersides of the hubsinks, removing the aluminium oxide anodising, till i had mirror aluminium surface. FWIW, unless you use an antioxidizing compound (some type of heatsink compound, for instance) on those surfaces, they're going to reoxidize fairly quickly. (also...
by ridethelightning
Jun 27 2019 11:47pm
Forum: Items for Sale - New
Topic: Ebike Hub Motor overheating cooling solution - HUBSINK OFFICIAL THREAD
Replies: 90
Views: 10878

Re: Ebike Hub Motor overheating cooling solution - HUBSINK OFFICIAL THREAD

SlowCo wrote:
Jun 27 2019 9:02am
ridethelightning wrote:
Jun 27 2019 7:35am
just thought id post this for anyone who is super dedicated to keping their hub cool :mrgreen:
Is there ferrofluid in your hub motor?
yes, ~10ml
by ridethelightning
Jun 27 2019 7:35am
Forum: Items for Sale - New
Topic: Ebike Hub Motor overheating cooling solution - HUBSINK OFFICIAL THREAD
Replies: 90
Views: 10878

Re: Ebike Hub Motor overheating cooling solution - HUBSINK OFFICIAL THREAD

just thought id post this for anyone who is super dedicated to keping their hub cool :mrgreen: i carefully buffed the paint of my qs 205 before adding the hubsinks. i noticed when i did so that the qs paint was actually really thick! after i removed the paint i polished it with fine sandpaper, going...
by ridethelightning
Jun 14 2019 4:51am
Forum: E-Bike General Discussion
Topic: QS 205
Replies: 15
Views: 524

Re: QS 205

MadRhino wrote:
Jun 13 2019 4:35pm
The MXUS 3kw is built better than a QS 205 though, but the heavier QS 205 can shed more heat, thus can be fed more power.
can you add more details about why you like the mxus build please, im curious :D

i only have an old pressed steel stator v2mxus, im not that impressed by it..
by ridethelightning
Jun 14 2019 4:34am
Forum: Battery Technology
Topic: Samsung 30Q - high drain 18650 Li-ion cell's capacity test
Replies: 30
Views: 1461

Re: Samsung 30Q - high drain 18650 Li-ion cell's capacity test

well, when this cell first out on the market, i did a fair bit of research, and these details somehow weren't very easy to discover :| it was really marketed as a higher drain capable cell and many people said,with good chemistry for cycle life. i agree 15A is a lot for a cell to produce, but it sho...
by ridethelightning
Jun 13 2019 6:34am
Forum: Battery Technology
Topic: Samsung 30Q - high drain 18650 Li-ion cell's capacity test
Replies: 30
Views: 1461

Re: Samsung 30Q - high drain 18650 Li-ion cell's capacity test

At 15A discharge the manufacturer guarantees 60% of the initial capacity at 250th cycle so nobody promised some great cycle life at max discharge rate. the max claimed peak power for this cell is like 20A or 25A something(sorry cant remember exactly) so 60% initial capacity at 250 cyles at only 15 ...
by ridethelightning
Jun 05 2019 9:25am
Forum: Battery Technology
Topic: Samsung 30Q - high drain 18650 Li-ion cell's capacity test
Replies: 30
Views: 1461

Re: Samsung 30Q - high drain 18650 Li-ion cell's capacity test

I have built 4 large packs with these. they are ok if you have plenty in parallel. after all the initial discussion about them being good chemistry, like the 20R and 25R cells, I was not very happty to see that they can lose capacity very fast compared to other cells, and my not be that good with re...
by ridethelightning
Jun 03 2019 2:59am
Forum: Items for Sale - Used
Topic: (aus)crystalyte X5404
Replies: 1
Views: 266

Re: (aus)crystalyte X5404

sorry, no longer for sale.
by ridethelightning
Jun 02 2019 8:24am
Forum: Stand-up E-scooters and E-skateboards
Topic: 10kW stand-up scooter with air suspension
Replies: 188
Views: 14300

Re: 10kW stand-up scooter with air suspension

normally i dont look at these scooters, but this is beyond normal! :D
by ridethelightning
Jun 02 2019 12:33am
Forum: Battery Technology
Topic: Spot Welding Copper Strips to 18650 Battery Cells
Replies: 217
Views: 35678

Re: Spot Welding Copper Strips to 18650 Battery Cells

holy crap! they look like the perfect thing. rebuilding your welder may not be so hard. im at that point now, modifying a riba welder https://endless-sphere.com/forums/viewtopic.php?f=14&t=100435 basically use the low current timing circut to provide the 12v pulse for the fets and build a larger swi...
by ridethelightning
Jun 01 2019 10:25pm
Forum: Battery Technology
Topic: Spot Welding Copper Strips to 18650 Battery Cells
Replies: 217
Views: 35678

Re: Spot Welding Copper Strips to 18650 Battery Cells

All my welder does is shorts a 800CCA car battery for the amount of milliseconds it is set to. No control over the pulse current lol. Even though it has some issues, I think this is a good solution vs buying that $10,000 welder at the start of this thread. yes you do have control of the current! ju...
by ridethelightning
Jun 01 2019 8:12pm
Forum: Battery Technology
Topic: Spot Welding Copper Strips to 18650 Battery Cells
Replies: 217
Views: 35678

Re: Spot Welding Copper Strips to 18650 Battery Cells

sounds like your max pulse current isnt high enough. if it takes 40ms to make the weld, i think thats too long and will probably dump too much heat into the weld. your looking for a massive burst of amps in like 7ms or something. i think you would need ballpark 2000A to attempt copper welding, with ...
by ridethelightning
Jun 01 2019 7:44am
Forum: Battery Technology
Topic: Spot Welding Copper Strips to 18650 Battery Cells
Replies: 217
Views: 35678

Re: Spot Welding Copper Strips to 18650 Battery Cells

Nickel has a much high melting point then copper. So the molten nickel probably just punches threw it and cools when it hits the nickel battery tap. Effectively bolting the copper in place. close i think. i think its working because the high resistance of the nickel is creating heat on the copper. ...