Search found 253 matches

by Addy
Mar 31 2021 4:44pm
Forum: EBike Build Threads
Topic: leaning trike cargo bike front end kit
Replies: 177
Views: 32299

Re: leaning trike cargo bike front end kit

Thanks for sharing all your pictures! Your bike is really interesting. With all that cargo and water capacity you can go on quite a journey.
by Addy
Mar 04 2021 7:33pm
Forum: Battery Technology
Topic: 'on board' 1.5kW charger. Which alibaba supplier?
Replies: 170
Views: 4139

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

Even sitting isolated at Full is causing damage so why float? You can float charge at whatever SOC you want, it doesn't have to be at 100%. Floating above the resting full voltage is (stupidly) trying to stuff more charge **in**, but without actually increasing any usable stored energy. It's simply...
by Addy
Mar 04 2021 7:13pm
Forum: Battery Technology
Topic: 'on board' 1.5kW charger. Which alibaba supplier?
Replies: 170
Views: 4139

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

Lithium should not be floated, full stop In your opinion, not in fact :wink: If an insignificant amount of wear on the battery is acceptable, then floating is fine. When you float charge a lithium cell, the cell gets fully charged to the point where the only current flowing into the battery is a ti...
by Addy
Feb 20 2021 11:47pm
Forum: EBike Technical
Topic: Can this VESC work with a regular throttle?
Replies: 6
Views: 291

Re: Can this VESC work with a regular throttle?

So if this ESC comes with the VESC software and the ESC is rated for 16S AND the VESC software has the option for field weakening... Doesn't that mean that it will work fine with the extra voltage from the BEMF as it's designed for it? Field weakening is not an option by default, so the 16s rating ...
by Addy
Feb 19 2021 12:27am
Forum: EBike Technical
Topic: Can this VESC work with a regular throttle?
Replies: 6
Views: 291

Re: Can this VESC work with a regular throttle?

rg12 wrote:
Feb 18 2021 3:03am
Is field weakening a matter of software or hardware?
I would say it's mostly software, the hardware is the same except that you may want to have more headroom in the voltage rating of the controller, since the BEMF of the motor can go higher than the battery voltage when field weakening is used.
by Addy
Feb 17 2021 5:12pm
Forum: EBike Technical
Topic: Can this VESC work with a regular throttle?
Replies: 6
Views: 291

Re: Can this VESC work with a regular throttle?

Yes, this VESC (and pretty much every other one) can work with regular throttles, they get connected to one of the analog inputs. Field weakening is something of a beta feature right now, you have to jump through some hoops to get the option to show up, but it does seem to work well enough as far as...
by Addy
Feb 09 2021 5:37pm
Forum: EBike General Discussion
Topic: Fully 3D Printed DIY electric car
Replies: 52
Views: 2483

Re: Fully 3D Printed DIY electric car

It seems pretty reasonable. Not sure what controls your relay (is it for flashing?), or how the brake signal works.
by Addy
Feb 03 2021 4:37pm
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1328
Views: 203988

Re: kWeld - "Next level" DIY battery spot welder

If you have a crappy fuse installed, the resistance of the fuse itself could be limiting your weld current. Worth trying a proper fuse IMO.
by Addy
Jan 29 2021 2:15am
Forum: EBike General Discussion
Topic: Spring or air??
Replies: 41
Views: 1270

Re: Spring or air??

ebike11 wrote:
Jan 28 2021 10:07pm
Is your air fork located inside the mid frame?
It's a DNM USD-8.

Overclocker wrote:
Jan 28 2021 10:30pm
put some fox float fluid (the air chamber lube, not damper fluid)

or mix some SuperLube teflon grease w/ some fork oil. this solved my air leakage issue (not DNM)
Thanks for that suggestion, I'll give that a try :thumb:
by Addy
Jan 28 2021 6:50pm
Forum: EBike General Discussion
Topic: Spring or air??
Replies: 41
Views: 1270

Re: Spring or air??

I hate having to pump up my air fork every 2 weeks. Maybe that's just because it's a DNM, but I wouldn't get an air fork in the future.
by Addy
Dec 28 2020 6:51pm
Forum: EBike General Discussion
Topic: Fully 3D Printed DIY electric car
Replies: 52
Views: 2483

Re: Fully 3D Printed DIY electric car

I am working on a chemical welding product and procedure, in order to make the joints very strong. Far stronger than the parts themselves; If you are worried about that... This part of your project will be quite interesting. If you were using ABS plastic, acetone would be great for welding the part...
by Addy
Dec 10 2020 2:25pm
Forum: Items for Sale - New
Topic: Questionnaire : Anyone has problem with wiring vesc in scooter or ebike?
Replies: 12
Views: 516

Re: Be careful of this problem when you're applying VESC in ebike escooter

-- -But often the throttle is cut off and the brakes are also likely to be bad, the brakes are mechanical switches, with higher bad possibility. I think people using VESC for ebikes/escooters are probably taking advantage of the variable regen capability, like I am. I'm using a hall-effect brake le...
by Addy
Dec 09 2020 1:31pm
Forum: Items for Sale - New
Topic: Questionnaire : Anyone has problem with wiring vesc in scooter or ebike?
Replies: 12
Views: 516

Re: Be careful of this problem when you're applying VESC in ebike escooter

1.The ADC input of ESC(based on VESC) is in float mode, and there is no filtering measurement. If this input port is left floating, it is easy to be interfered by electronic interference, and ESC will be misjudged by the signal voltage that requires the motor to run. The symptom is: the throttle is...
by Addy
Nov 30 2020 5:57pm
Forum: General Discussion
Topic: Linux geeks thread
Replies: 28
Views: 1239

Re: Linux geeks thread

What do you use for performance monitoring at the terminal? Thanks for sharing what you use. I gave glances a try as it was available for RPi. It's quite informative but a bit slow to launch on the RPi. I usually use htop because it's lightweight and I like to see the load on the individual CPU cor...
by Addy
Nov 29 2020 3:27am
Forum: General Discussion
Topic: Linux geeks thread
Replies: 28
Views: 1239

Re: Linux geeks thread

I use linux for servers and embedded devices like raspberry pis. I find linux interesting and I still have a lot to learn.
by Addy
Nov 29 2020 1:08am
Forum: EBike General Discussion
Topic: The ebike parts designing thread with CAD/CAM
Replies: 133
Views: 22286

Re: The ebike parts designing thread with CAD/CAM

Bringing this topic back from the dead... Fast forward a few years and now there are big printers on the market. I have the ANycubic Chiron with a 400mmx400mm print bed. It is huge and can definitely print a whole jumbo battery case. Is anyone else working on this topic ?? If you want to print out ...
by Addy
Nov 03 2020 1:56pm
Forum: General Discussion
Topic: How Does Phone Fast Charging Works?
Replies: 10
Views: 533

Re: How Does Phone Fast Charging Works?

The phones would have some kind of efficient DC/DC converter to step down to the battery voltage. Indeed, the current would be huge if you charge a single 3.7V cell with 100W. I'm surprised a phone would do that, but there must be lithium cells out there that can take such high charge rates.
by Addy
Oct 28 2020 4:45pm
Forum: Battery Technology
Topic: 3D Printed Cell Holders
Replies: 9
Views: 2566

Re: 3D Printed Cell Holders

I forgot to post an update here earlier, we have a video now showing these cell holders being used to build a 26650 pack: [youtube]veCY7lVOHZ8[/youtube] Also, from the Thingiverse page, the user 'aphotix' posted their build of an ebike battery pack, using the 3D printed holders as well as the box. T...
by Addy
Oct 13 2020 1:51pm
Forum: EBike Technical
Topic: raising voltage to maximize regen. braking?
Replies: 56
Views: 2670

Re: raising voltage to maximize regen. braking?

Steph, you raise a good point about the input current, I agree. As for your question, I think a lower battery voltage would give you higher efficiency in recovering the momentum of the bike, for the reasons we discussed. When you are braking, the motor voltage (BEMF) is being reduced proportionally ...
by Addy
Oct 12 2020 3:56pm
Forum: EBike Technical
Topic: raising voltage to maximize regen. braking?
Replies: 56
Views: 2670

Re: raising voltage to maximize regen. braking?

What will change when you change the battery or the motor winding is essentially the frequency at which the high fet is switched. So what I can see as potential efficiency impact are the switching losses (a few tens of nC per switch, I don’t think that will amount to noticeable effect) and impedanc...
by Addy
Sep 21 2020 12:30pm
Forum: Items for Sale - New
Topic: N.E.S.E. the no solder module
Replies: 473
Views: 80758

Re: N.E.S.E. the no solder module

The clip-art would be terifying for someone who is new and i would cringe myself. What matters is real life data. And i have that. The resistance of my system at extreme discharge rate is almost nothing and that is while vibrating the module. And i almost can bet that spotwelded sane amount of nick...
by Addy
Sep 18 2020 2:19pm
Forum: Battery Technology
Topic: It's dead Jim. Dead battery pack
Replies: 5
Views: 231

Re: It's dead Jim. Dead battery pack

Could be a low cell group or flaky balance wire connection. Have you tried waking up the BMS by charging the battery?
by Addy
Sep 13 2020 4:00pm
Forum: Items for Sale - New
Topic: N.E.S.E. the no solder module
Replies: 473
Views: 80758

Re: N.E.S.E. the no solder module

Welding is not a proper way anyway. When welding, some heat gets through to cell electrolite which deteriorates cell more or less. Then you have nickel which is less conductive than copper. You cant weld 1.8mm nickel to the cell which would have equal throughoutput of my tabs not to mention contact...
by Addy
Aug 27 2020 3:20pm
Forum: General Discussion
Topic: 18650 cells in series safely?
Replies: 8
Views: 482

Re: 18650 cells in series safely?

If you have a 30A capable battery at 4.2V and you're running a circuit to a device that, according to its resistance and overall design, should draw 100 amps at that voltage like a power tool, it won't. It would draw 30 because the battery can only do 30. A battery (cell in this case) that's rated ...
by Addy
Jul 21 2020 5:43pm
Forum: EScooters/EMotorcycles
Topic: Super Soco TS Upgrade
Replies: 65
Views: 7678

Re: Super Soco TS Upgrade

Is the effect / The real world performance that it is 33kw because the phase amps are 350 but the voltage just lower of course or are you saying 14kw is always 14kw whatever you mix the amps or the voltage to the motor. Are there any advantages or is it just how the controller works. thanks Yes, I'...