Search found 3977 matches

by DrkAngel
Feb 16, 2018 1:58 pm
Forum: Battery Technology
Topic: Homemade Battery Packs
Replies: 1521
Views: 325095

Re: Box of 80 Fullriver LiFePO4 26650 3.2V 3300mAh

Cu wrapped magnets perform nicely!

Magnets in:
Tinned Copper Braid - Left
Copper adhesive foil - Right

CuWrap.jpg
CuWrap.jpg (66.09 KiB) Viewed 99 times
Magnet in Copper foil supports 3+ LiFePO4 cells
CuWrap hang.jpg
CuWrap hang.jpg (40.33 KiB) Viewed 99 times
Built 5s parallel connectors
1s5pCumag.jpg
1s5pCumag.jpg (66.77 KiB) Viewed 99 times
by DrkAngel
Feb 16, 2018 3:09 am
Forum: Battery Technology
Topic: Homemade Battery Packs
Replies: 1521
Views: 325095

Re: Box of 80 Fullriver LiFePO4 26650 3.2V 3300mAh

Received 80 26650 LiFe cells. Beginning tests: 1. delivered voltage 62% within 3.327V >> 3.330V 2 high near 3.34V and 10 low near 3.30V 2. Preliminary capacity test Will test representative samples 1st. Need reliable connections for charge\discharge\charge test. Problem - method of connecting to te...
by DrkAngel
Feb 16, 2018 2:02 am
Forum: E-Bike General Discussion
Topic: LiFePO4 "FullRiver" Bulk Purchase-Quantity
Replies: 4
Views: 677

Re: LiFePO4 "FullRiver" Bulk Purchase-Quantity

80 - 26650 LiFe cells arrived.
Sorted cells by received voltage
2 - cells near 3.40V - charge-discharge testing iMax B8s 1 Blue + 1 Black
8 cells near 3.33V
50 cells between 3.330V >> 3.327V - 1 testing on iMax B6
10 cells between 3.318V >> 3.324V
10 cells near 3.00V 3.100V
by DrkAngel
Feb 15, 2018 10:55 am
Forum: E-Bike General Discussion
Topic: LiFePO4 "FullRiver" Bulk Purchase-Quantity
Replies: 4
Views: 677

Re: LiFePO4 "FullRiver" Bulk Purchase-Quantity

Delivery was estimated at 4-6weeks, but just got UPS tracking for delivery at 10 days from purchase. Seller accepted "make offer" of $70 +$20.19 shipping. NEW Box of 80 Fullriver LiFePO4 26650 3.2V 3300mAh Rechargeable Batteries $90 - 844Wh = $106.64/kWh Yeah ... delivery today! Just getting over th...
by DrkAngel
Feb 14, 2018 9:27 am
Forum: E-Bike General Discussion
Topic: new eZip motor
Replies: 4812
Views: 273795

Re: new eZip motor

If I get two more I can put them in a back pack and switch them for the return home. :mrgreen: Poor use of packs! Increase range, performance and lifespan by using 4 packs in parallel! Your propensity for high drain on low Ah batteries ensures poor performance-range-lifespan!!! Add simple volt mete...
by DrkAngel
Feb 14, 2018 12:26 am
Forum: E-Bike General Discussion
Topic: new eZip motor
Replies: 4812
Views: 273795

Re: new eZip motor

Already explained to you how "legal-illegal" eBikes are in NY!

18650 and 26650 are the size of cells, size has nothing to do with charge voltage!
Chemistry is another matter, irregardless of size ...
Could be 3.6V or 4.2V or 4.35V etc.
by DrkAngel
Feb 13, 2018 9:59 pm
Forum: E-Bike General Discussion
Topic: new eZip motor
Replies: 4812
Views: 273795

Re: new eZip motor

I would like to build a 20 Ah pack from 18650 cells. Also I am very confused about the two Lipo chargers I have. I think they will charge 26650 cells if I run 6 in series however do not know if they charge six 18650 cells in series. It is why I have been interested in the 26650 cells so I don't hav...
by DrkAngel
Feb 13, 2018 9:21 pm
Forum: E-Bike General Discussion
Topic: new eZip motor
Replies: 4812
Views: 273795

Re: new eZip motor

Looks like the Sona cells are effectively "empty" @ 3.50V ... ?
BMS cuts off near 30V, which demonstrates a 5V pack sag, at moderate discharge, when cells near empty,

BMS should automatically "reset" when voltage recovers somewhat ... but might require a drain disconnect-reconnect.
by DrkAngel
Feb 07, 2018 2:47 am
Forum: Battery Technology
Topic: MeanWell Mods - S-150-48 +Mega-Mod
Replies: 13
Views: 3286

Re: MeanWell Mega-Mod - S-150-48

S-150-48 Mega-Mod I wanted a more universal-adjustable power supply. So, I added a built in Volt Amp meter. Then, added deluxe external pots for extended adjustability. https://endless-sphere.com/forums/download/file.php?mode=view&id=146786 The 1K pot supplied adjustment from about 40V to 54V .... ...
by DrkAngel
Feb 05, 2018 10:39 am
Forum: Battery Technology
Topic: Homemade Battery Packs
Replies: 1521
Views: 325095

Re: Box of 80 Fullriver LiFePO4 26650 3.2V 3300mAh

.
.........
LiFePO4 Capacity "Map" Test


Image
by DrkAngel
Feb 05, 2018 10:01 am
Forum: E-Bike General Discussion
Topic: LiFePO4 "FullRiver" Bulk Purchase-Quantity
Replies: 4
Views: 677

Re: LiFePO4 "FullRiver" Bulk Purchase-Quantity

3300mAh cells still available.
Decided to purchase a case for small project.
I will test and rate cells for posting up here.
by DrkAngel
Feb 05, 2018 9:49 am
Forum: Battery Technology
Topic: Homemade Battery Packs
Replies: 1521
Views: 325095

Re: Box of 80 Fullriver LiFePO4 26650 3.2V 3300mAh

Corrected (sorry) typographical errors, wrong volts etc Minimum LiFePO4 charge voltage looks to be ≥ 3.40V, recommended is variously listed as 3.60V - 3.65V and maximum is listed at ≤ 4.20V. I might test bulk (power supply) charging as high as 3.50V. (I need a low mA charge current disconnect! - to...
by DrkAngel
Feb 04, 2018 3:23 pm
Forum: Battery Technology
Topic: Homemade Battery Packs
Replies: 1521
Views: 325095

Re: Box of 80 Fullriver LiFePO4 26650 3.2V 3300mAh

Reputedly, from at least one source, 8s (25.6V) LiFe can use the same Lithium charger as my standard 7s (25.9V) LiCo! ... ??? 7s (LiCo) x 4.20V = 29.4V 29.4V ÷ 8s (LiFe) = 3.675V LiFePO4 charge.jpg 3.675V charge voltage looks within acceptable range ... ? Unlike LiCo, LiFe seems to need higher volt...
by DrkAngel
Feb 03, 2018 9:08 pm
Forum: Battery Technology
Topic: Homemade Battery Packs
Replies: 1521
Views: 325095

Box of 80 Fullriver LiFePO4 26650 3.2V 3300mAh

Running short on the Samsung cells, deal is long gone, decided to save remaining intact 37V 4.4Ah BMSed for 36V projects, that leaves several eZip battery cases with SLA or worn out Lithium. Might have found an extremely cheap, acceptable solution. LiFePO4 26650 3.2V 3.3Ah cells (9.9Ah continuous di...
by DrkAngel
Jan 30, 2018 9:13 am
Forum: E-Bike Technical
Topic: Speed vs Range
Replies: 24
Views: 4194

Re: Speed vs Range

Be aware that my graphs and charts are based on level travel on good surface travel. Not factored are: acceleration, getting up to speed; climbing hills (might use >5≫10X the energy per mile; coasting down hills (down hill uses much less≫0 energy, but full throttle even under no load can still uses ...
by DrkAngel
Jan 30, 2018 8:49 am
Forum: E-Bike Technical
Topic: EBike Toolbox - Bargains! $
Replies: 132
Views: 37428

Re: EBike Toolbox - Bargains! $

Shimano Trigger shifter 7spd rear seems excellent, front 3spd is a manual friction but has sufficient travel for use as rear 7-8spd. https://endless-sphere.com/forums/download/file.php?id=227083 < $5 delivered Chinese "Stainless Steel" 6\7\8 speed bicycle chain Purchased for Snow Beast use in Upsta...
by DrkAngel
Jan 29, 2018 8:50 am
Forum: E-Bike General Discussion
Topic: Snow Beast Refurb
Replies: 21
Views: 1103

Re: Snow Beast Refurb

Amazing free shipping can be offered from China on a sub $5.00 item! By longstanding international agreement "postal service" fees are collected by sending country. In a perfect world this would even out, every country would send like amounts of postage and receive equal fees. China, seeing the ben...
by DrkAngel
Jan 28, 2018 12:21 pm
Forum: E-Bike General Discussion
Topic: new eZip motor
Replies: 4812
Views: 273795

Re: new eZip motor

latecurtis wrote:
Jan 28, 2018 12:22 am
Nobody seems to know if there is a motor sprocket for it though.
Damn! ... you have got to be the laziest person!
Read shaft size, did ebay search and found hundreds!
by DrkAngel
Jan 28, 2018 3:22 am
Forum: E-Bike General Discussion
Topic: Snow Beast Refurb
Replies: 21
Views: 1103

Re: Snow Beast Refurb

Last major item is derailleur, cables and , now, shifter. Shifter was previously "repaired" with duct tape :oops: . Problem is ... oem shifter is a 7 speed "reverse built" for left side placement, placing a "normal" 7 speed shifter on the left side produces an awkward direction shift. So, I have de...
by DrkAngel
Jan 27, 2018 4:22 pm
Forum: E-Bike General Discussion
Topic: new eZip motor
Replies: 4812
Views: 273795

Re: new eZip motor

.
22.2V 20Ah Microstar LiPo $207.50 for 444Wh - ( unprotected ! ) - 5.304lb

37V 17.6Ah Samsung LiCo $100 for 651Wh - ( protected ! ) - 8.552lb

8.552lb ÷ 651Wh X 444Wh = 5.832lb

444Wh LiPo = 5.304lb - $207.50
444Wh LiCo = 5.832lb including BMS's - $68.28
by DrkAngel
Jan 27, 2018 9:53 am
Forum: E-Bike General Discussion
Topic: new eZip motor
Replies: 4812
Views: 273795

Batts for Batty

22.2V 20Ah Microstar LiPo $207.50 for 444Wh - ( unprotected ! ) https://endless-sphere.com/forums/download/file.php?mode=view&id=227760&sid=5f932b4e4077a543ac3a3ddedbf45731 37V 17.6Ah Samsung LiCo $100 for 651Wh - ( protected ! ) https://endless-sphere.com/forums/download/file.php?id=225163
by DrkAngel
Jan 27, 2018 9:22 am
Forum: E-Bike General Discussion
Topic: new eZip motor
Replies: 4812
Views: 273795

Re: new eZip motor

For around town 6S Lipo will work for ALL my motors. The smallest motor I run is the 500 24V unite with the 800 watt 36~V unite on front. dual 500 controllers. Gearing is 1,000 watt total and 20 mph. Then the 750 watt gear reduction chain drive on the Currie. The 800 watt 20" (currently running ) t...
by DrkAngel
Jan 27, 2018 8:28 am
Forum: E-Bike General Discussion
Topic: new eZip motor
Replies: 4812
Views: 273795

Dummy²

I only screwed up a few times when running LiPo hundreds of times. Tonight was not one. pack voltade was greater than 3.7 on all six when switching to the 36V packs downtown. Nothing is charging and not going anywhere tommorow. Getting drunk. . If you click on the picture it will get larger. 22V - ...
by DrkAngel
Jan 27, 2018 7:19 am
Forum: E-Bike General Discussion
Topic: new eZip motor
Replies: 4812
Views: 273795

Dummy²

The variable controllers without any LVC protection run 6S LiPo. Any knowledgable e bike rider should know the capacity of the batteries they use. LiPo alarms and such are for dummys. :lol: :lol: What does that say about you, since you've destroyed so many Lipos? A full level of incompetence-stupid...
by DrkAngel
Jan 26, 2018 8:30 am
Forum: E-Bike General Discussion
Topic: new eZip motor
Replies: 4812
Views: 273795

Re: new eZip motor

Sonas are long gone, Samsungs are long gone, you gotta jump on these great deals when they show up! https://www.ebay.com/itm/LG-18650-LITHIUM-ION-36V-4-4AH-BATTERY-EBIKE-VAPE-POWERWALL-EV-20-CELLS-WITH-BMS/173120557739?_trkparms=aid%3D222007%26algo%3DSIM.MBE%26ao%3D2%26asc%3D44039%26meid%3D70a19abd...