Search found 706 matches

by DogDipstick
Sep 24 2020 5:06am
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 1551
Views: 194827

Re: bluetooth BMS?

tmho wrote:
Sep 24 2020 1:30am

Here is the video showing the balancing done by my bms:
https://www.youtube.com/watch?v=eUayl-8JyoI

Do you think you could do that vid again and turn your phone and the cam so that we can see the actual cell diff voltages and the whole screed?

Vertical video syndrome at its finest.
by DogDipstick
Sep 23 2020 5:46pm
Forum: Items Wanted
Topic: WTB: Controller for a Qs205
Replies: 5
Views: 160

Re: WTB: Controller for a Qs205

Bein a buyer starting out like that.. well. may turn some away.... saying you want to find someone else for a controller. However, being a seller... I dont care one way or another, you saying you want to find someone else for a controller. So the Sabvo 72150 will cost you 450$ plus shipping. New. No...
by DogDipstick
Sep 20 2020 11:45am
Forum: Battery Technology
Topic: Wire gauge and amps, series vs parallel
Replies: 5
Views: 424

Re: Wire gauge and amps, series vs parallel

Someone once discussed this with me. This is what he had come up with. I saved the screenshots, of the equations. This is what you want to know, right? Put numbers where you know they go, and you have the answer, I think. You are competent enough electrical hobbyist to see this. Sorry the last pic w...
by DogDipstick
Sep 20 2020 11:36am
Forum: E-Bike General Discussion
Topic: What kind of sealant for hub motors? Some general information also
Replies: 4
Views: 171

Re: What kind of sealant for hub motors? Some general information also

You should check out Jus... got 2 options: 1. If you can tolerate the occasional drip of oil , put some ATF in the motor and pick up the added benefit of better cooling. 2. Put a drain hole at t.... IDK whay everyone says you will leak if you use ATF. I have, and nada drop. Maybe it is the axle is ...
by DogDipstick
Sep 19 2020 12:42pm
Forum: E-Bike General Discussion
Topic: What kind of sealant for hub motors? Some general information also
Replies: 4
Views: 171

Re: What kind of sealant for hub motors? Some general information also

I used loctite 504 anaerobic gasket maker. Best stuff out there dont let a drop of liquid of vapor through. Holds pressure great. Wonderful stuff if you are in need of reliability,. The best in the world use it. I put that sh** on errytang. https://www.henkel-adhesives.com/us/en/product/gasketing-se...
by DogDipstick
Sep 19 2020 6:43am
Forum: Battery Technology
Topic: Wire gauge and amps, series vs parallel
Replies: 5
Views: 424

Re: Wire gauge and amps, series vs parallel

Calculate it. Very well known and defined eq. to use.
by DogDipstick
Sep 18 2020 6:44am
Forum: Battery Technology
Topic: Recognize Nickel Purity...
Replies: 8
Views: 224

Re: Recognize Nickel Purity...

Just followed your recommendation today and bought me 1 liter of 35% hydrogen peroxide :D What did you mean by heat? Heating the liquid or heating the metal and dropping it into the liquid? how hot is hot? Hydrogen peroxide has a specific heat of decomposition. It breaks down into water and oxygen....
by DogDipstick
Sep 15 2020 6:16am
Forum: Battery Technology
Topic: Recognize Nickel Purity...
Replies: 8
Views: 224

Re: Recognize Nickel Purity...

I think you should buy an XRF gun. Just googled that...$5000-$20,000 for that... I will stick to my dremel and salt and asking here for advice :lol: ( strong, real,) Hydrogen Peroxide+ Heat... ( not that drugstore brown bottle, but 12% or greater ) makes ferros metal rust. Fast. VErY fast. In secon...
by DogDipstick
Sep 14 2020 9:59am
Forum: Battery Technology
Topic: Stress Testing 3.2V 100AH prismatic cells
Replies: 11
Views: 709

Re: Stress Testing 3.2V 100AH prismatic cells

If you're just testing one cell at a time, at. 5c that's up to 50amps @3.2v. Most dischargers won't go to ... ...a roll of nichrome wire and make your rap it around something heat proof and/or non conductive ceramic, wood or the likes. Say 6 strands at the right length ~1mt. atteries (sans the wate...
by DogDipstick
Sep 14 2020 5:47am
Forum: Battery Technology
Topic: Recognize Nickel Purity...
Replies: 8
Views: 224

Re: Recognize Nickel Purity...

I think you should buy an XRF gun.
by DogDipstick
Sep 12 2020 5:31am
Forum: E-Bike General Discussion
Topic: What does a good battery pack go for in 2020?
Replies: 22
Views: 674

Re: What does a good battery pack go for in 2020?

I am selling a 30Ah 2,500Wh 72v pack for 450$. Plus shipping.

500+A capable, 6 Gauge wire, 20Ga BMS sense leads, built into DMC crimppedd gold with a break out board. Lasts years.
by DogDipstick
Aug 30 2020 11:13pm
Forum: Items for Sale - Used
Topic: LG Chem P1~15Ah ~1.2mOh ~10C+ High Power PHEV Cells~10$ Ea.
Replies: 11
Views: 1205

Re: LG Chem P1~15Ah ~1.2mOh ~10C+ High Power PHEV Cells~10$ Ea.

Are you still making packs from these? I'm looking for 72v 20ah? Depending on size I can stuff in my vespa. https://endless-sphere.com/forums/viewtopic.php?f=10&t=104268 Yes absolutely. I am wrapping up a 30Ah pack right now for a scooter. I have a couple planned, that I am working aon, a 52v and a...
by DogDipstick
Aug 13 2020 9:40am
Forum: E-Bike General Discussion
Topic: Why are geared motors worse than direct drive for climbing hills?
Replies: 53
Views: 2647

Re: Why are geared motors worse than direct drive for climbing hills?

100% agree. Minimising stress in the axle is the goal . Minimise stress by maximising the area over which the force is applied => tight fit and maximum surface contact. You spelled minimize and maximize wrong, friend, but I know you are not native to England so I will give you a break. I hear your ...
by DogDipstick
Aug 11 2020 5:41pm
Forum: E-Bike General Discussion
Topic: Why are geared motors worse than direct drive for climbing hills?
Replies: 53
Views: 2647

Re: Why are geared motors worse than direct drive for climbing hills?

For torque arms, it doesn’t give any advantage to ha You don’t need hard steel to make custom dro ok Karens. yall do you, I'll do me. Lol. To each their own, but I just told you a very easy, cheap way to toughen the metal. Might not NEED it.. .. but I also dont "NEED " more than 750w and 20mph acco...
by DogDipstick
Aug 10 2020 7:32pm
Forum: E-Bike General Discussion
Topic: Why are geared motors worse than direct drive for climbing hills?
Replies: 53
Views: 2647

Re: Why are geared motors worse than direct drive for climbing hills?

Pretty easy to make custom torque arms, if you have a few basic tools. Drill, file, angle grinder, and a pair of vise grips. One thing alot of peeps forget... to mention... is the hardness. IDKY but Im a metalhed, and I always gotta mention. Just carbonize it ( the steel.. ).. with a acetylene torc...
by DogDipstick
Aug 08 2020 6:50am
Forum: E-Bike Technical
Topic: 19" Motorcycle Wheels vs 26" Bicycle Wheels (rim and tires)
Replies: 2277
Views: 335451

Re: 19" Motorcycle Wheels vs 26" Bicycle Wheels (rim and tires)

Rix wrote:
Aug 07 2020 3:29pm
Disregard my last. here is a pic of Luke's bike with a 273 laced to an 18" rim, its 2X lace pattern, he did have the holes drilled at steep angles to make it work.
Looks like 1x to me? Am I missing something?
by DogDipstick
Aug 06 2020 11:21pm
Forum: E-Bike General Discussion
Topic: How much power is too much power? (hub motor)
Replies: 42
Views: 1215

Re: How much power is too much power? (hub motor)

If I had a little more power it would probably be perfect. So whats it got? Srry i have to know. Nice, nice bike. Clean, neat, comfy looking, but still with that racer stance. nice. Plus pedals, so very cool. I had a goal to build a 40 hp bike using only 400A @ 72v doesn't seem unachievable. You ar...
by DogDipstick
Aug 05 2020 11:11am
Forum: Battery Technology
Topic: Spot weld cell puncture - how 'catastrophic' is this?
Replies: 4
Views: 472

Re: Spot weld cell puncture - how 'catastrophic' is this?

What would I do? I'd weld it shut with lead, and monitor it for the next year to know the answer definitively. In a drawr in a fireproof safe in a bank vault under Fort Knox. Datalogged from baseline every week for a year. I would not use it in a pack that you will rely upon or be complacent with in...
by DogDipstick
Aug 04 2020 7:55pm
Forum: E-Bike General Discussion
Topic: crack in frame. salvageable?
Replies: 20
Views: 824

Re: crack in frame. salvageable?

It would take me 30 seconds per side to weld that shut in steel. I promise you wont break it again, . Ever,., .I would use a stick, and it wouldn't be pretty and shiny, with zero splatter, but would look and be very strong. I could mig it, I could tig it, if you wanted zero splatter and perfect half...
by DogDipstick
Aug 04 2020 7:33am
Forum: Battery Technology
Topic: Recommended battery / BMS tester ?
Replies: 5
Views: 210

Re: Recommended battery / BMS tester ?

I am building a load array that you can run with a Cycle Analyst and datalog the results. It is getting kind of expensive, but is a universal battery/motor/controller testing machine. 24v-240v. Max I can pull is about 20Kw. Min is about 75w.

Not much out there.

Current Voltage IRpack Capacity
by DogDipstick
Aug 04 2020 6:41am
Forum: General Discussion
Topic: How To Wire This Switch?
Replies: 9
Views: 523

Re: How To Wire This Switch?

You can't use that switch for speed control. The blower is also only single speed. You would need a speed controller for a single phase motor. Oh damn... Well, found exactly what I needed! https://www.aliexpress.com/item/4001175799855.html?spm=a2g0o.productlist.0.0.7af17addcn8ucJ&algo_pvid=eb46887c...
by DogDipstick
Aug 03 2020 7:02am
Forum: Battery Technology
Topic: Affordable Cell Cycler?
Replies: 10
Views: 332

Re: Affordable Cell Cycler?

It was general statement that universal/modeller charger is usually not designed as battery tester/cycler. My issues with PLx software was that there were no possibility to set any cycle count, there was only options 1,5,10,20 and infinite. Other issue was with the stability of very long logs, I lo...
by DogDipstick
Aug 02 2020 11:45am
Forum: Battery Technology
Topic: Affordable Cell Cycler?
Replies: 10
Views: 332

Re: Affordable Cell Cycler?

Most problems are related with the software. What problems? Might I ask, friend? ? What software did you use? There are other soft wares for viewing the data ( than the OEM)... Which is useful for comparison of DCIR fade when you compare first and last cycle curve. Easily done with the Pl series. D...
by DogDipstick
Aug 01 2020 2:58pm
Forum: Battery Technology
Topic: Affordable Cell Cycler?
Replies: 10
Views: 332

Re: Affordable Cell Cycler?

My Pl6 by Revolectrix is very good when it comes to it. You know. I can set it up and do a 100mAh cell ( x6, actually) through hundreds cycles or a 100Ah cell through hundreds of cycles. All on datalog and spreadsheet for export. Old, but good. Well known and accepted in the hobby community, and sim...