Search found 198 matches

by thoroughbred
Oct 16 2021 9:56am
Forum: Battery Technology
Topic: Waterlogged lite speed lite bee battery
Replies: 15
Views: 223

Re: Waterlogged lite speed lite bee battery

I see a couple of issues. 1. The innards are not designed to survive any water infiltration. The bottom enclosure is water tight. The cells are wrapped in paper. Once wet, the contents have no chance of drying out. 2. The enclosure isn't waterproof. It's assembled with butt joints and sealant. The t...
by thoroughbred
Oct 16 2021 7:43am
Forum: Battery Technology
Topic: Waterlogged lite speed lite bee battery
Replies: 15
Views: 223

Re: Waterlogged lite speed lite bee battery

20 cells or the 2 p group of cells located at the bottom of the battery sit at zero volts.

The battery was wet enough to allow discharge of the cells at the bottom. Sort of a gentle short circuit, yikes!
by thoroughbred
Oct 16 2021 7:35am
Forum: Battery Technology
Topic: Waterlogged lite speed lite bee battery
Replies: 15
Views: 223

Re: Waterlogged lite speed lite bee battery

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by thoroughbred
Oct 16 2021 7:33am
Forum: Battery Technology
Topic: Waterlogged lite speed lite bee battery
Replies: 15
Views: 223

Re: Waterlogged lite speed lite bee battery

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by thoroughbred
Oct 16 2021 6:51am
Forum: Battery Technology
Topic: Waterlogged lite speed lite bee battery
Replies: 15
Views: 223

Re: Waterlogged lite speed lite bee battery

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by thoroughbred
Oct 14 2021 5:49am
Forum: Battery Technology
Topic: Waterlogged lite speed lite bee battery
Replies: 15
Views: 223

Re: Waterlogged lite speed lite bee battery

Here's the two layers of shrink-wrap surrounding the battery
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Beneath that is a layer of gorilla tape wrapped around the polycarbonate sidewalls
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by thoroughbred
Oct 14 2021 5:42am
Forum: Battery Technology
Topic: Waterlogged lite speed lite bee battery
Replies: 15
Views: 223

Re: Waterlogged lite speed lite bee battery

I dived into measuring voltages coming out of the balance wires starting withe the unburned connector. I got 4 volts on the first one and the readings were slowly decreasing as I went along, down to 3.6 volts. As the notes show, I got a couple of exactly 0 volts. This made me wonder if it is actuall...
by thoroughbred
Oct 13 2021 7:05pm
Forum: Battery Technology
Topic: Waterlogged lite speed lite bee battery
Replies: 15
Views: 223

Re: Waterlogged lite speed lite bee battery

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These aren't technically related to the water damage but further digging reveals that the 3 wires were spliced incorrectly. Balance wire to p group one was spliced to balance wire p group 5.
by thoroughbred
Oct 13 2021 6:57pm
Forum: Battery Technology
Topic: Waterlogged lite speed lite bee battery
Replies: 15
Views: 223

Waterlogged lite speed lite bee battery

A friend gave me a damaged battery to fiddle with so I took some pics to show the internals. The history is that the bike was left outside in the elements during a rain storm which resulted in a non responsive condition. The battery was inverted in hopes of draining the water out. The top was remove...
by thoroughbred
Oct 12 2021 8:46am
Forum: EScooters/EMotorcycles
Topic: SURRON LB: RESEARCH & DEVELOPEMENT
Replies: 293
Views: 45202

Re: SURRON LB: RESEARCH & DEVELOPEMENT

https://litespeedbikes.mybigcommerce.com/72v40ah-surron-battery/ This one is 450mm tall and is 20s10p molicells, looks like the cells are held by snap-together honeycomb I have bigbirds waterlogged litespeed opened up. It was obviously not waterproof/rainproof! I would say avoid any water exposure b...
by thoroughbred
Aug 13 2021 6:30am
Forum: Items for Sale - New
Topic: Nucular electronics - complete kit for ev! [beta]
Replies: 1590
Views: 183312

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

My light bee runs great with a 24F and 16S battery. If I go to use a 21S battery, what, beside the voltage settings, should I change in the settings? Do I need to back down regen parameters? What other factors do I need to worry about? I'll likely keep the kW output at the same level, mainly adding ...
by thoroughbred
Aug 03 2021 7:49am
Forum: EScooters/EMotorcycles
Topic: 5 Speed Manual DR650 Conversion with QS138 and BAC8000 (It Rips!)
Replies: 12
Views: 839

Re: 5 Speed Manual DR650 Conversion with QS138 and BAC8000 (It Rips!)

I like this alot! I guess the dr650 lends itself to this approach because of its long stroke creating enough room for the motor inside the case. Do you happen to have a measurement of distance between the centers of the motor shaft and the countershaft? I'd like to do a similar project while choosin...
by thoroughbred
Apr 26 2021 6:50am
Forum: EBike Technical
Topic: Nucular Electronics owner's thread (setup infos, FW updates, links etc.)
Replies: 539
Views: 56435

Re: Nucular Electronics owner's thread (setup infos, FW updates, links etc.)

I know the 24f does a lot of things I dont understand. Is there any way to use front wheel speed data to influence rear wheel acceleration or speed?

Using the available rear wheel acceleration rate parameter hasnt produced the results i want for wheelspin control.
by thoroughbred
Apr 10 2021 5:57am
Forum: EScooter/EMotorcycle Build Threads
Topic: Yamaha YZF250F
Replies: 207
Views: 14335

Re: Yamaha YZF250F

im very interested in the controller situation. good for you to jump into the sevcon morass. how much were the emdrive controllers you had considered?
by thoroughbred
Apr 08 2021 6:36am
Forum: Motor Technology
Topic: The HI-Lebowski: a Lebowski SMD brain running a zombified Honda IMA Inverter: *a HOW-TO guide*
Replies: 57
Views: 7961

Re: The HI-Lebowski: a Lebowski SMD brain running a zombified Honda IMA Inverter: *a HOW-TO guide*

what is the best vintage of used IMA inverters to buy? most of the listings are for 2010-2014 cars which look different from what is documented here. I want small, powerful and simple :)
by thoroughbred
Mar 30 2021 7:21am
Forum: Motor Technology
Topic: How can i control this 15kw motor
Replies: 13
Views: 2319

Re: How can i control this 15kw motor

looks like amberwolf was right, its a resolver setup so go off those connections on the diagram near the bottom
by thoroughbred
Mar 24 2021 5:59am
Forum: EScooters/EMotorcycles
Topic: 260v Dirt Bike 2021
Replies: 37
Views: 1613

Re: 260v Dirt Bike 2021

Is it possible to use the prius MG2 in its own case? I'm looking for a picture of it not bolted to the other motor as a complete assembly.
by thoroughbred
Mar 14 2021 7:16pm
Forum: EBike Technical
Topic: Nucular Electronics owner's thread (setup infos, FW updates, links etc.)
Replies: 539
Views: 56435

Re: Nucular Electronics owner's thread (setup infos, FW updates, links etc.)

My set up is a QS205 V3 3.5T motor, 20s15p 30Q pack with a 24F controller. Did auto set up, saved settings and road around for about an hour 2 days ago. Worked excellent. Disconnected the battery when I was finished. Plugged the battery in and closed the cover. Twisted the throttle and the bike shu...
by thoroughbred
Mar 01 2021 7:39pm
Forum: Motor Technology
Topic: Build a controller for an Alta OEM motor and inverter?
Replies: 19
Views: 1739

Re: Build a controller for an Alta OEM motor and inverter?

Chances are your inverter and encoder use the absolute angle interface. It's SPI. The upper left-hand connector labeled ENC has 2 labels, RACS and RACLK which are typical SPI signals. I think VESC has some kind of support for ams encoders but if it doesn't it's possible to write some code to read t...
by thoroughbred
Feb 25 2021 7:27am
Forum: EScooter/EMotorcycle Build Threads
Topic: Conversion of a Bultaco Sherpa
Replies: 117
Views: 6348

Re: Conversion of a Bultaco Sherpa

I say B+ cable attaches to NC. The port that goes into the controller is raised and has a red grommet. The screw has a witness mark on it so its tightened by Kelly already. The other bolt is probably loose and goes into a blind hole in the case ie NC
by thoroughbred
Feb 22 2021 7:43pm
Forum: Motor Technology
Topic: Help! Anyone recognise this Sevcon-style controller from China?
Replies: 10
Views: 1072

Re: Help! Anyone recognise this Sevcon-style controller from China?

That is the offroad version of the endless sphere logo :es:

i'm interested in answers, too.... 8)
by thoroughbred
Feb 15 2021 7:53pm
Forum: EScooters/EMotorcycles
Topic: KDX 20.0 cells trailbike conversion
Replies: 28
Views: 4208

Re: KDX 20.0 cells trailbike conversion

The problem with fitting a clutch comes from trying to package cylinders of various diameter and length into a finite space. The countersprocket position is set in stone. I'm having real trouble coming up with a way of having a jackshaft arrangement incorporating a clutch. Using an existing gearbox ...
by thoroughbred
Feb 14 2021 7:13pm
Forum: EScooter/EMotorcycle Build Threads
Topic: Yamaha YZF250F
Replies: 207
Views: 14335

Re: Yamaha YZF250F

very nice work! You can get 1/2 links for the chain. I think this roller tensioner idea is interesting:
https://www.renold.com/products/accessories/roll-ring/

did you get good news about the motor being built and any progress on the controller/s?
by thoroughbred
Feb 13 2021 6:43pm
Forum: EScooters/EMotorcycles
Topic: SURRON LB: RESEARCH & DEVELOPEMENT
Replies: 293
Views: 45202

Re: SURRON LB: RESEARCH & DEVELOPEMENT

Will the light bee motor be ok with 24S battery? I read that Luna melted some motors down and wonder what the actual limits of the motor are. Isn't the storm bee 96V and does that equate to 24S?