Search found 4206 matches

by DrkAngel
Dec 14 2018 6:50am
Forum: Battery Technology
Topic: Any advantage of one layout over the other?
Replies: 21
Views: 1046

Re: Any advantage of one layout over the other?

With a 200A controller, you will need an absolute minimum of >200A fuse!
200A fuse "burns up" at 200A, near 200A there is excessive heat and resistance.
300A recommended.
by DrkAngel
Dec 12 2018 7:12am
Forum: E-Bike General Discussion
Topic: new eZip motor
Replies: 5361
Views: 344979

Re: new eZip motor

Checked a couple weeks ago also, couldn't get them either. Must have been a site crash? Always loved them, great prices and selection w/free shipping @ $150 purchase (used to be $100). Live within 50 miles so any shipping is reasonable. https://www.niagaracycle.com successful transitioned to https:...
by DrkAngel
Dec 11 2018 5:36pm
Forum: E-Bike General Discussion
Topic: new eZip motor
Replies: 5361
Views: 344979

Re: new eZip motor

Checked a couple weeks ago also, couldn't get them either.
Must have been a site crash?
Always loved them, great prices and selection w/free shipping @ $150 purchase (used to be $100).
Live within 50 miles so any shipping is reasonable.
by DrkAngel
Dec 11 2018 10:07am
Forum: E-Bike General Discussion
Topic: new eZip motor
Replies: 5361
Views: 344979

Re: new eZip motor

by DrkAngel
Dec 11 2018 7:47am
Forum: E-Bike General Discussion
Topic: Watseka XP Resurrection?
Replies: 2
Views: 80

Re: Watseka XP Resurrection

Watseka appears to have been taken over, or rebranded as NAKTO.

Better parts catalog, with prices, Lithium battery available (too small and expensive for me though )
Many, not all, parts compatible.

NAKTO replacement parts
by DrkAngel
Dec 11 2018 7:08am
Forum: E-Bike General Discussion
Topic: Watseka XP Resurrection?
Replies: 2
Views: 80

Re: Watseka XP Resurrection

. hmmm, can no longer "attachment" pdf file Links to Manual and parts parts available by still good email link Watseka.com Manual pdf Replacement Parts - prices by email Replacement battery or cells not presently available but intend on replacing 9Ah 23.8lb SLA with 13.2Ah 6lb triple hoverboard bat...
by DrkAngel
Dec 11 2018 6:43am
Forum: E-Bike General Discussion
Topic: Watseka XP Resurrection?
Replies: 2
Views: 80

Watseka XP Resurrection?

. ... Watseka XP Click on picture, links to info-review https://electricbikereview.com/wp-content/assets/2016/08/watseka-xp-electric-bike-review-1200x600-c-default.jpg Originally touted as a cheap ($650), heavy (78lb), under powered (250w), slow (14mph) eBike. Customer brought in a beat up, broken ...
by DrkAngel
Dec 09 2018 10:14am
Forum: Battery Technology
Topic: Why large parallel connection in battery packs ?
Replies: 9
Views: 331

Re: Why large parallel connection in battery packs ?

1st - "Battery" is a collection of cells working together. Single cells are not batteries! Basic parallel connectors with good matched cells will effectively carry 0A current. My battery builds, as are a considerable percentage, are a combination of several series batteries, paralleled together. Par...
by DrkAngel
Dec 08 2018 5:51pm
Forum: E-Bike General Discussion
Topic: Snow Beast Refurb
Replies: 27
Views: 2562

Re: Snow Beast Refurb

With 2" studded tires, at room temperature, I keep them near 40psi. Which relates to, likely, < 30psi in sub freezing temps. I do set my bike outside for several minutes to acclimatize to the cold, don't want snow to melt and freeze on rims. But, keep my battery inside and warm, till ready to go. Ti...
by DrkAngel
Dec 05 2018 9:42am
Forum: E-Bike Technical
Topic: EBike Toolbox - Bargains! $
Replies: 142
Views: 45884

Re: EBike Toolbox - Bargains! $

. ... ☃ Winter projects? ☃ MY1016Z3 24V 350w gear reduction motors back in stock at good price! Reversible Push to 36V 525w+ 9T;11T;13T motor sprockets available, adapter for 13-22T+ freewheels https://endless-sphere.com/forums/download/file.php?mode=view&id=244589&sid=2271694638732cb89f7c7b94170e3...
by DrkAngel
Dec 04 2018 9:09am
Forum: Battery Technology
Topic: Experimenting with 32v DC fuses at 48v and 68v
Replies: 35
Views: 2290

Re: Experimenting with 32v DC fuses at 48v and 68v

I build 7s 25.9V batteries for a multitude of 24V eZips. So 2 - 7s segments is great for me, (14s for my 48V 750\1000w switchable, 14s lets me hit 30mph!), saddle bag deployment or otherwise ...
by DrkAngel
Dec 04 2018 8:17am
Forum: E-Bike General Discussion
Topic: Snow Beast Refurb
Replies: 27
Views: 2562

Re: Snow Beast Refurb

Swapped rebuilt eZip wheel is slightly off center and needs relocation via spoke adjustment. Will properly "true" during next fair weather period. I rebuilt 3 eZip wheels with spoke problems and 1 with a bad bearing cup, last Summer (only roughly centered and trued). 2 w/13ga SS and 1 w/14ga SS. All...
by DrkAngel
Dec 04 2018 7:39am
Forum: Battery Technology
Topic: Experimenting with 32v DC fuses at 48v and 68v
Replies: 35
Views: 2290

Re: Experimenting with 32v DC fuses at 48v and 68v

Just to note:
Using a 32V fuse effectively and safely with "48V" battery.
14s 51.8V Lithium battery @ "full" 58.8V.
Place 32V fuse between 2 x 7s segments!
Voltage across fuse will not exceed 29.4V.
(Will not affect BMS function)

20s (84V)
Fuse between 3 (7s 7s 6s) segments ...
etc.
by DrkAngel
Nov 26 2018 8:55am
Forum: Battery Technology
Topic: Homemade Battery Packs
Replies: 1605
Views: 385173

Re: Homemade Battery Packs

I mentioned storing my older cells @ 3.85V, 3.65V for my newer chemistry Samsung and determining optimal voltage range for any cell type and storing at the 20-50% capacity voltage. Insuring , of course, that optimal (usable) voltage is determined at static voltage - Some manufacturers discharge grap...
by DrkAngel
Nov 25 2018 7:47pm
Forum: Battery Technology
Topic: Homemade Battery Packs
Replies: 1605
Views: 385173

Re: Homemade Battery Packs

.
...
Updated Lithium Chemistry Chart
Li-Chemistries.jpg
Li-Chemistries.jpg (64.02 KiB) Viewed 1267 times

Link to full Article
- descriptions
by DrkAngel
Nov 25 2018 4:40pm
Forum: Battery Technology
Topic: Homemade Battery Packs
Replies: 1605
Views: 385173

Re: Homemade Battery Packs

Index . ... 25.9V 26.4Ah #1 finished 7s12p Samsung cells are capable of 120A continuous 240A surge but controllers are <30A and installed 40A fuse (trying new 58V fuses & holder) Just finished 1, had to test drive it ... rain stopped for awhile. No BMS installed! Turned out were only 20A continuous...
by DrkAngel
Nov 25 2018 1:30pm
Forum: Battery Technology
Topic: Homemade Battery Packs
Replies: 1605
Views: 385173

Re: Homemade Battery Packs

You must 1st realize the difference between static voltage (after discharge) and sag voltage (during discharge)! If you notice ... when used, I draw data from minimal discharge rates (0.2A < 0.1C) https://lygte-info.dk/pic/Batteries2012/Samsung%20ICR18650-28A%202800mAh%20(Purple)%204.3V/Samsung%20IC...
by DrkAngel
Nov 25 2018 11:31am
Forum: Battery Technology
Topic: Homemade Battery Packs
Replies: 1605
Views: 385173

Re: Homemade Battery Packs

Well, back to the merits of my question. In the light of the facts I mentioned, do you still consider 3,85 V suitable voltage for winter storage of non recycled Li-ion cells ? Al cells vary at optimal usable voltage! https://endless-sphere.com/forums/download/file.php?id=165657 #1 Too deep discharg...
by DrkAngel
Nov 25 2018 9:51am
Forum: Battery Technology
Topic: Homemade Battery Packs
Replies: 1605
Views: 385173

Re: Homemade Battery Packs

Describes multiple methods, including:
Actual mapping from measured-metered charge;
Derived from manufacturers discharge graphs;
more.
by DrkAngel
Nov 25 2018 9:21am
Forum: Battery Technology
Topic: Homemade Battery Packs
Replies: 1605
Views: 385173

Re: Homemade Battery Packs

Al cells vary at optimal usable voltage! Some cells are effectively empty at, as high as, 3.75V. https://endless-sphere.com/forums/download/file.php?id=119518 Storing at below "empty" is liable to be damaging (and dangerous)! I like to ensure a "safe" storage voltage, which is dependent on cell form...
by DrkAngel
Nov 25 2018 8:22am
Forum: Battery Technology
Topic: Homemade Battery Packs
Replies: 1605
Views: 385173

Re: Homemade Battery Packs

DrkAngel, Is 3,85 V storage voltage meant for LiPo only or also for Li-ion cells ? If yes, do you have any reason to use such high voltage for winter storage ? Oft recommended is storing at ≤ 50% With some of my mapped cells 3.85V is closer to 20-25% Newer cells this is near 50-60% With the majorit...
by DrkAngel
Nov 22 2018 11:02pm
Forum: E-Bike Technical
Topic: Ebikeling 500w Geared Hub Kit
Replies: 19
Views: 2009

Re: Ebikeling 500w Geared Hub Kit

.
..
. SW900 LCD Manual

SW900LCDInstructions.pdf
(107.68 KiB) Downloaded 17 times
LED vs LCD
by DrkAngel
Nov 21 2018 10:13am
Forum: E-Bike General Discussion
Topic: Where to buy geared rear hub motor kit?
Replies: 19
Views: 1463

Re: Where to buy geared rear hub motor kit?

Those smaller geared motors are great, do fine for most people. Just not the big guy towing a trailer up that hill is all. Personally, I can fry those smaller motors in 20 min easy as pie if I run it hard, like off road riding. This is more a climate problem I have, than anything else. Controller i...