Search found 1400 matches

by Hummina Shadeeba
Mar 09, 2018 1:03 am
Forum: E-Bike General Discussion
Topic: very long phase wires
Replies: 8
Views: 328

Re: very long phase wires

wow hold on there. is this turning into a disaster thread... that's not what this is.
by Hummina Shadeeba
Mar 08, 2018 6:16 pm
Forum: E-Bike General Discussion
Topic: very long phase wires
Replies: 8
Views: 328

Re: very long phase wires

I plugged the focboxs in backward to the battery! there's no formal errors when I look for that, says none, but the voltage in realtime data is like 2 volts higher than it should be with one of them and it's getting warm while just doing the test. the other one is maybe fine. but I have a couple thi...
by Hummina Shadeeba
Mar 08, 2018 3:18 pm
Forum: E-Bike General Discussion
Topic: very long phase wires
Replies: 8
Views: 328

Re: very long phase wires

I should've been more clear...I cant get the motor to be controlled by the ..controller. Motors are failing the tests on the vesc. it could be a couple things but want to rule out the extra long motor wires. they're like 3 feet long. 3 feet long 10awg. loooonger than I've ever done. will that effect...
by Hummina Shadeeba
Mar 08, 2018 2:36 pm
Forum: E-Bike General Discussion
Topic: very long phase wires
Replies: 8
Views: 328

very long phase wires

is this a problem? I cant get my motor to pass tests and could be a couple things (too big magnets, friction...) but i'd like to know for sure that my phase wires being long isn't one of them.
by Hummina Shadeeba
Mar 02, 2018 3:08 pm
Forum: Battery Technology
Topic: Homemade Battery Packs
Replies: 1546
Views: 339920

Re: Homemade Battery Packs

definitely need to be balanced somehow. i like the simple "lipo discharge balancer" but they're very slow.
by Hummina Shadeeba
Feb 28, 2018 9:06 pm
Forum: Battery Technology
Topic: Potting Batteries, Thoughts and Experiments
Replies: 129
Views: 16984

Re: Potting Batteries, Thoughts and Experiments

maybe hot glue will slightly damage the cells from the heat. silicone from the hardware store seems good or better yet chose around a 90 duro polyurethane from smooth-on.com and wait till it get cures to the thickness you need to apply it. I think there's a danger with any of these of clogging the p...
by Hummina Shadeeba
Feb 23, 2018 11:54 pm
Forum: E-Vehicles General Discussion
Topic: motor wire vs battery wire sizing
Replies: 1
Views: 211

motor wire vs battery wire sizing

doesn't it make sense to use thicker wires for the motor with pwm turning things to more amps than the battery would be putting out? the motor wires will only ever see current half the time when the motor is powered with three phases, so could go thinner, but I think the high amps the motor phase wi...
by Hummina Shadeeba
Feb 14, 2018 10:43 pm
Forum: Battery Technology
Topic: 3D printed copper compression battery
Replies: 15
Views: 883

Re: 3D printed copper compression battery

liked this design last before getting a spot welder. with the bands it wouldn't fit the skate deck I want to use. I like the guards allowing a loop of copper to come up and I imagine relieve physical strain.
by Hummina Shadeeba
Feb 14, 2018 10:30 pm
Forum: Battery Technology
Topic: Spot Welding Copper Strips to 18650 Battery Cells
Replies: 164
Views: 16585

Re: Spot Welding Copper Strips to 18650 Battery Cells

this one is most versatile I've see and only 2 cells. really nice design. easy to print. https://www.aliexpress.com/item/High-Quality-18650-Battery-Holder-Bracket-ABS-Material-Anti-Vibration-Cylindrical-Battery-Spacers-Holder-18650-Batteries/32620037404.html?spm=2114.search0104.3.299.1e5dfec3nCN7fw&...
by Hummina Shadeeba
Feb 14, 2018 2:26 am
Forum: E-Bike Technical
Topic: Definitive Tests on the Heating and Cooling of Hub Motors
Replies: 2040
Views: 275955

Re: Definitive Tests on the Heating and Cooling of Hub Motors

Why would running such a motor amp to battery amp ratio be beneficial? Just reduced? The typical high 2.5:1 Phase to Battery current limit ratio so commonly used is a main source of heat problems. The reason is because it too often creates high phase current when you don't want it, eg at lower spee...
by Hummina Shadeeba
Feb 13, 2018 5:30 pm
Forum: E-Bike Technical
Topic: Definitive Tests on the Heating and Cooling of Hub Motors
Replies: 2040
Views: 275955

Re: Definitive Tests on the Heating and Cooling of Hub Motors

Why would running such a motor amp to battery amp ratio be beneficial? Just reduced?
by Hummina Shadeeba
Feb 12, 2018 3:06 am
Forum: E-Bike Technical
Topic: Definitive Tests on the Heating and Cooling of Hub Motors
Replies: 2040
Views: 275955

Re: Definitive Tests on the Heating and Cooling of Hub Motors

John in CR wrote:
Feb 11, 2018 4:45 am


Of course the easiest route to cooler temps (other than proper controller settings) remains the least used. That is directing more air flow toward the hubmotor shell.
or a bigger motor which will have a lower electrical resistance
by Hummina Shadeeba
Feb 11, 2018 12:54 am
Forum: E-Bike Technical
Topic: Bafang BBS02, DROK and 60 volts
Replies: 3
Views: 172

Re: Bafang BBS02, DROK and 60 volts

why use the step-down drok instead of get a power supply at the voltage you want?
by Hummina Shadeeba
Feb 05, 2018 11:23 am
Forum: E-Vehicles General Discussion
Topic: i can fit 6 more cells, why shouldn't I?
Replies: 5
Views: 347

Re: i can fit 6 more cells, why shouldn't I?

du. don't know why 11 got skipped. good idea! I'm too used to lipos coming in packs of 2
by Hummina Shadeeba
Feb 04, 2018 12:47 pm
Forum: E-Vehicles General Discussion
Topic: i can fit 6 more cells, why shouldn't I?
Replies: 5
Views: 347

Re: i can fit 6 more cells, why shouldn't I?

ok thanks. was think of 12s4p and 48 cells vs 10s5p and 50 cells and if there are any variables I'm missing. 5% more watthours and probably safer for the esc components vs a bit bigger current draw. Maybe in the long run the 12s cells would last longer. its spitting hairs and they both work but wond...
by Hummina Shadeeba
Feb 04, 2018 2:43 am
Forum: E-Vehicles General Discussion
Topic: i can fit 6 more cells, why shouldn't I?
Replies: 5
Views: 347

i can fit 6 more cells, why shouldn't I?

48 cells gets me 12s4p but I could fit 54 cells and I have them. Whats the story of the 12s4.5p?
by Hummina Shadeeba
Feb 04, 2018 12:37 am
Forum: Battery Technology
Topic: Spot Welding Aluminium
Replies: 17
Views: 872

Re: Spot Welding Aluminium

Al from soda/beer cans is 100% coated with prtective epoxy laquer..both sides.. So a lot of prep will be required. :o And the thickness is less than 0.1mm in the side walls, or 0.25 mm in the center of the bottom "dome" eww. i thought Coke was acidic enough to eat through stuff, why arent we all dr...
by Hummina Shadeeba
Jan 19, 2018 4:40 pm
Forum: Battery Technology
Topic: Spot Welding Copper Strips to 18650 Battery Cells
Replies: 164
Views: 16585

Re: Spot Welding Copper Strips to 18650 Battery Cells

I have some .14mm copper and it is weak but maybe that's actually a good thing. not saying necessarily and would depend on each instance but if the strip can bend then it isn't putting the strain on the welded connection to the cell
by Hummina Shadeeba
Jan 17, 2018 3:04 am
Forum: Stand-up E-scooters and E-skateboards
Topic: motor wires interfere with reciever?
Replies: 5
Views: 227

Re: motor wires interfere with reciever?

aren't the antennae kind of specific or fragile? can you simply extend the wire with another soldered on wire?

I thought I heard somewhere motor wires could interfere..any second opinions?
by Hummina Shadeeba
Jan 17, 2018 12:03 am
Forum: Stand-up E-scooters and E-skateboards
Topic: motor wires interfere with reciever?
Replies: 5
Views: 227

motor wires interfere with reciever?

will the motor wires interfere with my receiver antenna beside it?
by Hummina Shadeeba
Jan 17, 2018 12:02 am
Forum: Stand-up E-scooters and E-skateboards
Topic: Direct VESC V4.12
Replies: 15
Views: 1501

Re: Direct VESC V4.12

but he does post the guide and says its easy to do! I've never done it.
by Hummina Shadeeba
Jan 13, 2018 4:32 am
Forum: Battery Technology
Topic: Spot Welding Copper Strips to 18650 Battery Cells
Replies: 164
Views: 16585

Re: Spot Welding Copper Strips to 18650 Battery Cells

it looks like the "boss level" welder has no trouble with .1mm copper strip and this guide, which seems more conservative than most, shows .1mm nickel x7mm strip doing 3amps comfortably, so with copper being 4 times as conductive couldn't I do a .1mm x 28MM FOLDED STRIP and that would net me 48 amps...
by Hummina Shadeeba
Jan 13, 2018 2:53 am
Forum: Battery Technology
Topic: Spot Welding Aluminium
Replies: 17
Views: 872

Re: Spot Welding Aluminium

adding another higher resistance material in a spot welding sandwich maybe creates the heat needed to do the most conductive materials: http://bbs.homeshopmachinist.net/thread ... pot-welded
by Hummina Shadeeba
Jan 07, 2018 7:30 pm
Forum: Battery Technology
Topic: DIY nickel-plating onto copper cell connections
Replies: 29
Views: 2384

Re: DIY nickel-plating onto copper cell connections

new info for me is that sodium benzotriazole is a good copper corrosion inhibitor. you can just dip the copper. haven't done it yet. electroplating is pretty damn fun though
by Hummina Shadeeba
Jan 03, 2018 1:55 pm
Forum: Battery Technology
Topic: trickle charging lithium
Replies: 3
Views: 218

Re: trickle charging lithium

thanks guys for the info and links above, there's a good one. The cells at 4.2 either on the charger or not makes no difference. makes sense.