Search found 469 matches

by Overclocker
Apr 15, 2018 9:22 pm
Forum: Battery Technology
Topic: Cycle Life tests or experience with Panasonic NCR18650GA vs LG MJ1 vs Samsung INR18650-35E
Replies: 26
Views: 528

Re: Cycle Life tests or experience with Panasonic NCR18650GA vs LG MJ1 vs Samsung INR18650-35E

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13s4p Sanyo GA pack. discharged w/ 6.8ohm load. pack was used on a BBS02 w/ over 4000km

i'm still getting 95% of original capacity
by Overclocker
Apr 15, 2018 7:49 am
Forum: E-Bike Photos & Video
Topic: Yet another BBS02 build, BeOne Nirvana 2.0
Replies: 12
Views: 3168

Re: Yet another BBS02 build, BeOne Nirvana 2.0

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same 6.8ohm load

i'm still getting 95% of original capacity after 14 months and over 4000km

new X-fusion rear shock, and testing a different fork:

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by Overclocker
Apr 04, 2018 9:26 am
Forum: E-Bike Non-hub Motor Drives
Topic: New build, BHT mid-drive "direct", custom frame
Replies: 59
Views: 8155

Re: New build, BHT mid-drive "direct", custom frame

The Stig wrote:
Apr 03, 2018 5:15 pm
Hi Overclocker,

I just wanted to confirm: which website did you buy the BHT motor from?
https://www.e-bike-diffusion.com

but i'm not sure if it's still available
by Overclocker
Apr 03, 2018 9:33 am
Forum: E-Bike Non-hub Motor Drives
Topic: New build, BHT mid-drive "direct", custom frame
Replies: 59
Views: 8155

Re: New build, BHT mid-drive "direct", custom frame

zero calculations made w/ this build (except for RPM calculations) :lol: it's all based on intuition :roll: Yeah i do it the same way most of the time, but sometimes it's deeply interesting to know some values :) yeah it would be great to be able to do finite element analysis and such. instead of t...
by Overclocker
Apr 02, 2018 10:55 pm
Forum: Battery Technology
Topic: Rebuilding my 48V 14AH 18650 Pack 13S7P to 13S8P
Replies: 26
Views: 658

Re: Rebuilding my 48V 14AH 18650 Pack 13S7P to 13S8P

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i have older NCR with dotted wrapper. some of them are clocking in at over 2900mah at 1C (2.9A discharge). that's more than advertised capacity after like 8 years
by Overclocker
Apr 02, 2018 10:48 pm
Forum: E-Bike Non-hub Motor Drives
Topic: New build, BHT mid-drive "direct", custom frame
Replies: 59
Views: 8155

Re: New build, BHT mid-drive "direct", custom frame

the motor can slide forward/back to adjust chain tension. i probably have to torque those bolts really hard though to keep the motor from "creeping" Did you do calculations for the maximum pulling force on the motor? The controller phase amps multiplied with kT will give you max motor torque. From ...
by Overclocker
Apr 02, 2018 10:47 pm
Forum: E-Bike Non-hub Motor Drives
Topic: New build, BHT mid-drive "direct", custom frame
Replies: 59
Views: 8155

Re: New build, BHT mid-drive "direct", custom frame

Cool project! I'm a big fan of frames with lots of steel tube fabrication. Hope the rest of the frame looks like the swingarm so far. You could add a plate on the other side of the thin slotted motor mount area. Drill holes the same as your motor mount bolt pattern and use set-screws to set the cha...
by Overclocker
Mar 31, 2018 10:21 am
Forum: E-Bike Non-hub Motor Drives
Topic: New build, BHT mid-drive "direct", custom frame
Replies: 59
Views: 8155

Re: New build, BHT mid-drive "direct", custom frame

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i'll add some gussets to stiffen it up

the motor can slide forward/back to adjust chain tension. i probably have to torque those bolts really hard though to keep the motor from "creeping"
by Overclocker
Mar 30, 2018 10:08 pm
Forum: E-Bike Non-hub Motor Drives
Topic: New build, BHT mid-drive "direct", custom frame
Replies: 59
Views: 8155

Re: New build, BHT mid-drive "direct", custom frame

skeetab5780 wrote:
Mar 30, 2018 8:44 am
Nice fab skills man, looking really nice

Image

i'm getting concerned about the strength of my motor mounting plate. it's 2.8mm mild steel. you think it'll hold up?

i think you had you had issues w/ bending your motor mounts in one of your vids
by Overclocker
Mar 18, 2018 8:49 pm
Forum: E-Bike Non-hub Motor Drives
Topic: New build, BHT mid-drive "direct", custom frame
Replies: 59
Views: 8155

Re: New build, BHT mid-drive "direct", custom frame

minde28383 wrote:
Mar 18, 2018 4:23 pm
I see, but how much you paid for it?
probably something like us$25
by Overclocker
Mar 18, 2018 11:04 am
Forum: E-Bike Non-hub Motor Drives
Topic: New build, BHT mid-drive "direct", custom frame
Replies: 59
Views: 8155

Re: New build, BHT mid-drive "direct", custom frame

minde28383 wrote:
Mar 18, 2018 10:43 am
how much you pay (in usd or euros) for your rear hub? Can I see it for sale on some web shop?

it's an aftermarket hub for a certain 150cc motorcycle. i purchased it from a local shop, not online
by Overclocker
Mar 18, 2018 10:30 am
Forum: E-Bike Non-hub Motor Drives
Topic: New build, BHT mid-drive "direct", custom frame
Replies: 59
Views: 8155

Re: New build, BHT mid-drive "direct", custom frame

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should be welding soon. i modified the design yet again :lol:

motor's gonna bolt onto that plate. chain tension adjustment by moving motor forward/back. greatly simplifies the rear axle parts

swingarm-mounted motor also eliminates chain growth issues
by Overclocker
Mar 14, 2018 5:13 am
Forum: General Discussion
Topic: Rebuilding notebook battery pack...will it be better than original?
Replies: 1
Views: 127

Re: Rebuilding notebook battery pack...will it be better than original?

careful w/ disconnecting the wires from the BMS. some of them shutdown permanently if they detect any unusual voltages from the sense lines so you may have to do a "live" transplant

and many notebooks use 4.3 or 4.35v cells so you have to be careful not to use 4.2v cells
by Overclocker
Mar 09, 2018 12:28 am
Forum: E-Bike Non-hub Motor Drives
Topic: New build, BHT mid-drive "direct", custom frame
Replies: 59
Views: 8155

Re: New build, BHT mid-drive "direct", custom frame

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i've decided to mount the motor on the swingarm but still coaxial w/ swingarm pivot

testing the drivetrain. it's quieter than i expected :roll:

by Overclocker
Jan 13, 2018 10:58 am
Forum: E-Bike Technical
Topic: Best Cushiony Rear Shock for Ebike
Replies: 16
Views: 784

Re: Best Cushiony Rear Shock for Ebike

cheap coil shocks can be simple w/ no damping

but some cheap ones w/ some rebound damping have primitive designs that have "spiking" issues i.e. very harsh on high-speed hits
by Overclocker
Jan 10, 2018 10:20 pm
Forum: Battery Technology
Topic: MeanWell HLG vs ELG as charger
Replies: 16
Views: 653

MeanWell HLG vs ELG as charger

https://ae01.alicdn.com/kf/HTB1nvswOpXXXXaXXpXXq6xXFXXXP/227166762/HTB1nvswOpXXXXaXXpXXq6xXFXXXP.jpg?size=453259&height=1689&width=1000&hash=50e7e38e6b64b35189cfda02c0b57cd6 https://ae01.alicdn.com/kf/HTB1.jjnLXXXXXbQXXXXq6xXFXXXz/227166762/HTB1.jjnLXXXXXbQXXXXq6xXFXXXz.jpg?size=500176&height=1718&...
by Overclocker
Aug 08, 2017 10:10 am
Forum: Items for Sale - New
Topic: QS MOTOR,0.5-14kW Electric Hub Motor Manufacture China
Replies: 1118
Views: 149551

Re: QS MOTOR,0.5-14kW Electric Hub Motor Manufacture China

https://upload.wikimedia.org/wikipedia/commons/thumb/0/0a/Hyundai_Eos_GL_2014_%2811954748753%29.jpg/280px-Hyundai_Eos_GL_2014_%2811954748753%29.jpg hi qsmotor. i'm thinking of putting two of your e-car hubmotors to the rear of this small Hyundai Eon, while keeping the engine to drive the front whee...
by Overclocker
Aug 07, 2017 1:15 am
Forum: Battery Technology
Topic: 18650 pack to jump start a small car...
Replies: 30
Views: 1892

Re: 18650 pack to jump start a small car...

haha actually my question is how many amps is needed to start this small 1.5L engine. that's all i need to know, i can deal w/ cell selection myself

think honda jazz engine, or hyundai accent

the objective is to use as few cells as possible
by Overclocker
Aug 06, 2017 9:32 am
Forum: Battery Technology
Topic: 18650 pack to jump start a small car...
Replies: 30
Views: 1892

18650 pack to jump start a small car...

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ford ecosport 1.5 liter gasoline

how many amps do i need to start this?

i'm thinking Sony VTC5A or the cheaper LG HB6
by Overclocker
Aug 05, 2017 12:42 pm
Forum: General Discussion
Topic: Sony 18650VTC5 cells FAKE or REAL?
Replies: 6
Views: 534

Re: Sony 18650VTC5 cells FAKE or REAL?

this is the only sure way. visual methods not reliable

https://endless-sphere.com/forums/viewtopic.php?t=87798
by Overclocker
Aug 04, 2017 9:37 am
Forum: Battery Technology
Topic: 6-channel independent charger / pseudo-balancer
Replies: 11
Views: 829

Re: 6-channel independent charger / pseudo-balancer



just watched this vid. apparently the TP5000 performs better... gotta look for TP5000 then
by Overclocker
Aug 04, 2017 2:55 am
Forum: Battery Technology
Topic: 6-channel independent charger / pseudo-balancer
Replies: 11
Views: 829

Re: 6-channel independent charger / pseudo-balancer

as mentioned earlier these are FAKE tp4056 chips. accuracy is a lot worse than i expected, they range from 4.11 to 4.25. totally unacceptable :roll: so i'll be ordering these TP5100 modules. the 2A charging current should be a big plus. switchmode so cooler running. google doesn't turn up anything f...
by Overclocker
Jul 30, 2017 9:06 am
Forum: E-Bike Technical
Topic: High cells count vs low cell count.
Replies: 10
Views: 623

Re: High cells count vs low cell count.

a high number of interconnects isn't inherently less safe. actually this is something that is easy to get right :roll: however a lot of things can and do go wrong w/ poorly designed 18650 packs. the metal can itself is one huge negative terminal covered by super thin PVC. have just a little chafing ...