Search found 859 matches

by DogDipstick
May 11 2021 9:18am
Forum: Battery Technology
Topic: Index of flat pouch cell connection methods
Replies: 13
Views: 326

Re: Index of flat pouch cell connection methods

the problem with pouch cells connecting is that cathode aluminium tabs oxidizing really fast after cutting/sanding which in my book increase connection resistance. The Chevrolet Volt cells DO NOT take to soldering very well, no mattter what quality fluxxes or system you have. I can do it... but ts ...
by DogDipstick
May 11 2021 4:29am
Forum: Large EV General Discussion
Topic: Dynamically reconfiguring pack voltage for RV
Replies: 8
Views: 214

Re: Dynamically reconfiguring pack voltage for RV

How in the world did you fit 150 KW hours in an RV.

I put 26 Kwhours in one, for a solar installation, and that took up a lot of volume.

Anyway I'd probably do the 80s bank and just use a good DC converter from a junkyard electric car for the low voltage power.
by DogDipstick
May 11 2021 4:15am
Forum: Motor Technology
Topic: Hubmonster teardown
Replies: 169
Views: 9713

Re: Hubmonster teardown

I built a battery for a Ym Wuxi 6 phase motor. Six fat ass phase wires. 12 or 10 inch motor for a scoot. Idk where it came from or how much it cost but it had (6) 4 gauge. It was stolen off a porch in Canada so I'm building another. The goal was to see 600 amps. This topic is interesting. I would li...
by DogDipstick
May 10 2021 7:54am
Forum: Motor Technology
Topic: QS205 temp sensor/beta value
Replies: 2
Views: 67

Re: QS205 temp sensor/beta value

c.wagner wrote:
May 10 2021 7:50am
Hi,


Here´s some eyecandy of the project, shown with another inverter in it, a VESC 75 300:

super soco1 (1).jpg
viewtopic.php?p=571345#p571345

Half way down. Cycle analyst linear temp sensor chart.
by DogDipstick
May 09 2021 8:27pm
Forum: Motor Technology
Topic: Oil cooling a motor with transformer oil/dielectric fluid - the next frontier?
Replies: 109
Views: 3342

Re: Oil cooling a motor with transformer oil/dielectric fluid - the next frontier?

The seals on cartridge bearings are for dust, not oil. That's why they're greased instead of oil lubricated. Please explain how you seal those against oil leakage while allowing them to turn. I'll get the part number off one of the ( three ) hub motors I have here and I;ll look it up to find its in...
by DogDipstick
May 09 2021 8:24am
Forum: Motor Technology
Topic: Oil cooling a motor with transformer oil/dielectric fluid - the next frontier?
Replies: 109
Views: 3342

Re: Oil cooling a motor with transformer oil/dielectric fluid - the next frontier?

And the consequences are significant: oil on brakes = no brakes, oil on tire = crash. I love sealing cases. I like the Kawa over the others cause you can split the case in a day sideway without a puller. So you can not care about it. I been in side the 700R4 through teh 4l85E. IN the 289 through th...
by DogDipstick
May 08 2021 7:53am
Forum: Motor Technology
Topic: Oil cooling a motor with transformer oil/dielectric fluid - the next frontier?
Replies: 109
Views: 3342

Re: Oil cooling a motor with transformer oil/dielectric fluid - the next frontier?

Chalo wrote:
May 07 2021 10:19am
Once you succeed at making e-bikes leaky and smelly, you can move on to figuring out how to make them emit toxic fumes and obnoxious noise.
OMG.

Lol I never leaked a drop chalo. You kmust dbe doing something wrong
by DogDipstick
May 08 2021 7:48am
Forum: Battery Technology
Topic: new larger lipo seems worse, is it?
Replies: 23
Views: 1074

Re: new larger lipo seems worse, is it?

i finally replaced my batteries wires from 14awg to 10awg and connectors from xt60s to xt90s removed/replaced every bus bar after polishing it up.....ANNND its done sweet fack all to improve the battery resistance reading on either of my chargers.... :( FWIW... i would not trust an IR reading from ...
by DogDipstick
May 02 2021 8:59am
Forum: Forum Rules and Features
Topic: The rules of endless sphere.
Replies: 13
Views: 560

Re: The rules of endless sphere.

Our #1 goal at En~ only do we need rules, but to have fairness in the enfo~tailed here. 1. We will delete posts only when necessary ( they are harmful, extremely off topic, illegal, etc. ). We prefer to retain 2. We will not moderate content based on our own biases, political affiliations, commerci...
by DogDipstick
May 02 2021 8:38am
Forum: EBike General Discussion
Topic: More newbie questions about USB ports and lights.
Replies: 11
Views: 259

Re: More newbie questions about USB ports and lights.

Molex P/N 84729 / 84727

or a

MOLEX P/N 795405004

I love building harnesses. I am getting very good at it.
by DogDipstick
Apr 22 2021 10:19am
Forum: EBike General Discussion
Topic: NBP WP40H (HUB MOTOR 8000W)
Replies: 4
Views: 162

Re: NBP WP40H (HUB MOTOR 8000W)

other seller told me that "The number of coils of copper wire winding is different" "it caused the torque and speed different" how do i know what is the one i received? only if i look inside? :D :D YOu can apply voltage ( known) and check RPM output at said voltage. Calculate Kv...
by DogDipstick
Apr 22 2021 7:42am
Forum: EBike General Discussion
Topic: What motor windings would you go with?
Replies: 21
Views: 510

Re: What motor windings would you go with?

I am buildig that bike right now. I went with a 40H 273 in 3.5T 19" moto rim, 350A phase, 8kw contin controller. 72v system. 160A contin, . 50 ( 55?) Ah pack of brand new Chevy Volt cells ( 0 miles). IR of the cells together is .0006 Ohm (0.6mOh) ( 1mOh each). Goal is to break 60mph. Without hu...
by DogDipstick
Apr 22 2021 7:31am
Forum: EBike Technical
Topic: Looking for suggestions on a 1000w+ hub motor
Replies: 5
Views: 337

Re: Looking for suggestions on a 1000w+ hub motor

professor_pouncey wrote:
Apr 21 2021 5:55pm
The second bike is for my cat.
Thanks Adam
Dammit I wish my cat would ride with me. Nope. Always sleepin in the windowsill.



I love my direct drive ATF filled QS205 35H 1000w motor overvolted to 4Kw with 8Kw peaks. The qs motor is a good 1000w motor.
by DogDipstick
Apr 22 2021 6:42am
Forum: EBike General Discussion
Topic: NBP WP40H (HUB MOTOR 8000W)
Replies: 4
Views: 162

Re: NBP WP40H (HUB MOTOR 8000W)

Please share with us a link that shows the motor in question.... ?
by DogDipstick
Apr 21 2021 8:32am
Forum: Battery Technology
Topic: Maximum charging amps for these ( RC Lipo ) cells
Replies: 33
Views: 545

Re: Maximum charging amps for these cells

I wrote the manual for assessing and doing second party quality control of RC Lipos but can't defend usage of them anymore because a majority of people haven't taken the memo. Where can I find this memo to read? Also, on top of Flippys contribution, I have posted NASA .pdf results shoing the same t...
by DogDipstick
Apr 20 2021 1:31pm
Forum: Battery Technology
Topic: Maximum charging amps for these ( RC Lipo ) cells
Replies: 33
Views: 545

Re: Maximum charging amps for these cells

Damn. Half a kilowatt hour. 200$. Chinese cells.
by DogDipstick
Apr 16 2021 6:49am
Forum: Items for Sale - New
Topic: Bike project unfinished
Replies: 3
Views: 639

Re: Bike project unfinished

PRICES please.
by DogDipstick
Apr 14 2021 7:21am
Forum: Bike Mechanical & Structural
Topic: Working rear triangle to accommodate different hub widths. How much is too much
Replies: 11
Views: 508

Re: Working rear triangle to accommodate different hub widths. How much is too much

Create a "bolt on" solution, not a "bend to yield" solution. You can easily lessen dropout width by extending the swinger a few inches and layering the anchors. Or increase the dropout width for a wider dimension. .....like a cheap extended swingarm on a rocketbike... They make n...
by DogDipstick
Apr 14 2021 7:14am
Forum: EBike General Discussion
Topic: Best Phase Wire Connectors & MXUS 3kw stock wires
Replies: 9
Views: 273

Re: Best Phase Wire Connectors & MXUS 3kw stock wires

(One of ) my bike(s) have 3mm^2 wire phase cross section. I run 4Kw contin and 8kw peaks. It is a 1Kw motor rating. the phase wires? i do not know how they survived at all. they regularly approach " considerable warm and soft and whatnot". 8Ga batt power harness. Its still alive. I have us...
by DogDipstick
Apr 08 2021 6:59pm
Forum: EBike Build Threads
Topic: Another full suspension build
Replies: 274
Views: 6199

Re: Another full suspension build

Finally, a bike.

Lol.
by DogDipstick
Apr 04 2021 11:15pm
Forum: EBike Technical
Topic: [SOLVED] Balance Discharger... or is there anything else?
Replies: 43
Views: 1342

Re: Balance Discharger... or is there anything else?

Dammit. Not knocking your purchase, but that charger sucks.. and the specs are all over the place. Is that like a glorified Opus charger? lol. Is it 15v? or will 14v blow it up? Says 15v, but below says over 14v will blow it up. It cannot do 6s (x) 8A balance current. nope. Can only 33w per. So ther...
by DogDipstick
Mar 30 2021 5:01am
Forum: Items Wanted
Topic: ISO 72 volt battery for e moto
Replies: 2
Views: 196

Re: ISO 72 volt battery for e moto

What's the ISO refer to in this context? "IN SEARCH OF" wanted used 72 volt at least 20 AH battery for e motorcycle with votol 150 controller, prefer high discharge. Well I could if I did not have so many in front of you. I wish I coudl handle the workload I have honestly. keep looking, I...
by DogDipstick
Mar 24 2021 11:47am
Forum: EBike General Discussion
Topic: Does more wattage gives more initial torque or only more speed
Replies: 17
Views: 696

Re: Does more wattage gives more initial toque or only more speed

Motors have a Tq./Amp number with the certain design. One vs another. Feed this much amps, get this much tq. ....put that in a rim to lever you along your way and have fun. The amount of butt dyno "umpf " this makes depends on the wheel diameter, load and how much work you put down. For th...
by DogDipstick
Mar 20 2021 4:37pm
Forum: Battery Technology
Topic: 'on board' 1.5kW charger. Which alibaba supplier?
Replies: 170
Views: 4496

Re: 'on board' 1.5kW charger. Which alibaba supplier?

Well thanks guys. I can get them for 100$ ea. Shipped. I don't know if that's a good price, for used condition unknown ( operation al) ... I honestly should get them just to have them . Anyways thanks for the replies.
by DogDipstick
Mar 20 2021 10:37am
Forum: Battery Technology
Topic: 'on board' 1.5kW charger. Which alibaba supplier?
Replies: 170
Views: 4496

Re: 'on board' 1.5kW charger. Which alibaba supplier?

Can you run Elcons in series? Like a pair of PFC high power 36v Elcons.... ? A pair of Elcon TCCH 36-33 PFC 1500s? Two 36v matching for 72v @ 3kw? Anybody know? I would like to try this. I can get them mega cheep. Cheep Cheep. I know you can pay for a reprogram, 100$, after sending it back... Flippy...