Search found 582 matches

by serious_sam
Jun 03 2021 4:28am
Forum: Items for Sale - New
Topic: Nucular electronics - complete kit for ev! [beta]
Replies: 1569
Views: 175241

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

You connect your psu like in the schematics Sam posted. And you set up how you want it to work in the "converter" menu if I remember correct. I recommend that you read the manual The question is directed at Vasilisk, I know how the Nucular can be wired for charging through phase wires. I'...
by serious_sam
Jun 03 2021 1:46am
Forum: Items for Sale - New
Topic: Nucular electronics - complete kit for ev! [beta]
Replies: 1569
Views: 175241

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

Hello Vasilisk, I hope this question is ok to ask you. Have you looked at vesc 6 hardware and software? Is there any reason why charging through phase wires isn't supported? I hope this makes sense! thank you! It is. Hi serious Sam, thank you for your answer! Is it as simple as plugging in a power ...
by serious_sam
Jun 02 2021 8:55pm
Forum: Items for Sale - New
Topic: Nucular electronics - complete kit for ev! [beta]
Replies: 1569
Views: 175241

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

cheapcookie wrote:
Jun 02 2021 7:26pm
Hello Vasilisk, I hope this question is ok to ask you.

Have you looked at vesc 6 hardware and software? Is there any reason why charging through phase wires isn't supported?

I hope this makes sense! thank you!
It is.
by serious_sam
May 31 2021 6:15pm
Forum: EBike Build Threads
Topic: Hub motor as mid (illegalbike)
Replies: 58
Views: 3315

Re: Hub motor as mid (illegalbike)

illegalbike wrote:
May 31 2021 2:25pm
Sweet bike !

The standard sprocket thread would unscrew in this configuration. I was wondering how you attached the sprocket to the motor ?
by serious_sam
May 23 2021 7:20am
Forum: Battery Technology
Topic: "Copper/nickel sandwich" buses for series connections
Replies: 68
Views: 5277

Re: "Copper/nickel sandwich" buses for series connections

I did try the dual pulse method. Tried some different timings. But in the end, I found that the single pulse did a better job.
by serious_sam
May 16 2021 3:00am
Forum: Battery Technology
Topic: Compression of pouch cells, info/data
Replies: 52
Views: 867

Re: Spot Welding Copper Strips to 18650 Battery Cells

serious_sam wrote:
May 15 2021 7:57pm
specialised PU foam
norseal pf100 foam.pdf
(772.84 KiB) Downloaded 14 times
by serious_sam
May 15 2021 7:57pm
Forum: Battery Technology
Topic: Compression of pouch cells, info/data
Replies: 52
Views: 867

Re: Spot Welding Copper Strips to 18650 Battery Cells

pressure depends on the expected application. the pack of a volt has strech bolts to get the proper pressiure. for context: its the same style of bolt used to keep the cylinder head on the engine. offically they are a 1 shot use but nobody actually replaces them. fun fact: even with several tons of...
by serious_sam
May 15 2021 6:03pm
Forum: Battery Technology
Topic: Compression of pouch cells, info/data
Replies: 52
Views: 867

Re: Spot Welding Copper Strips to 18650 Battery Cells

I communicated to a battery engineer from Zero motorcycles and and 100-psi is a helpful goal. I recall reading a cell datasheet that listed the pressure requirements, and it was nothing near that number. I'm fairly certain it was in the single digits (or maybe low double). Unfortunately I can't loc...
by serious_sam
May 11 2021 12:22am
Forum: EBike Technical
Topic: Mxus 3K temperature sensor help?
Replies: 33
Views: 890

Re: Mxus 3K temperature sensor help?

So I found some pictures of the thermistor installed inside the motor but I still don’t understand why there’s only one wire coming out of the motor?? :| It seems like there would be two wires coming out of the motor like you’re suggesting… You've already been told the answer: the mxus 3k turbo has...
by serious_sam
May 07 2021 6:03pm
Forum: Battery Technology
Topic: "Copper/nickel sandwich" buses for series connections
Replies: 68
Views: 5277

Re: "Copper/nickel sandwich" buses for series connections

I got some copper sheet and going to try this soon. My main concern is how to cut the copper in such a way as to avoid it overhanging too much and risking shorts from touching the wrong area/cell. I guess the obvious answer is to cut it carefully...any other suggestions? Cheers Cover each section i...
by serious_sam
May 02 2021 7:49pm
Forum: EBike General Discussion
Topic: Help with choosing the right battery for powerful motor
Replies: 22
Views: 730

Re: Help with choosing the right battery for powerful motor

Should I go for 72V battery or 48V is gonna have satisfactory top speed with 140kg weight as well? How many Ah should I go for to get good range? And the most important question for me is - should I look for a battery with 100A current or lower current is gonna be fine? Is it gonna be bad for the m...
by serious_sam
Apr 29 2021 4:53am
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 1662
Views: 224569

Re: bluetooth BMS?

My BMS is doing the same thing. As soon has they start balancing, I practically lose any way to communicate with the BMS. When only charging (no balancing), I can connect fine. Android latest app on two different phone. Also when balancing they randomly ask for password after fews secs (5-7). When ...
by serious_sam
Apr 28 2021 7:43pm
Forum: EBike Technical
Topic: Heat from amps, but what of watts?
Replies: 36
Views: 1163

Re: Heat from amps, but what of watts?

V=IR
P=VI
P= V^2/R
P=I^2R
by serious_sam
Apr 27 2021 4:33am
Forum: EBike Technical
Topic: Mxus 3K temperature sensor help?
Replies: 33
Views: 890

Re: Mxus 3K temperature sensor help?

the mxus 3k turbo has a white temperature wire built-in. Actually it has two of them because it has two sets of hall sensors. Right now the two white wires are just not connected. Each set of hall/temp sensors is independent/isolated from the other set. Use one set, forget the other set (that's bac...
by serious_sam
Apr 20 2021 3:56am
Forum: EBike Technical
Topic: Modifying a Hub Motor
Replies: 55
Views: 1690

Re: Modifying a Hub Motor

fatty wrote:
Apr 19 2021 8:24am
serious_sam wrote:
Apr 19 2021 8:16am
Power.
I never made any claims about power.
If you never admit when you've put your foot in your mouth (and you never do), you'll never get rid of that bad breath.

And your breath stinks bad.

I'm out.
by serious_sam
Apr 19 2021 8:16am
Forum: EBike Technical
Topic: Modifying a Hub Motor
Replies: 55
Views: 1690

Re: Modifying a Hub Motor

The OP didn't specify a controler. So you're cherry picking a case to try to prove your point. I just used a different controller spec to disprove your point. Here it is with your battery and motor combo, but a different controller. https://ebikes.ca/tools/simulator.html?motor=MX4506&batt=cust_...
by serious_sam
Apr 19 2021 7:53am
Forum: EBike Technical
Topic: Modifying a Hub Motor
Replies: 55
Views: 1690

Re: Modifying a Hub Motor

Ahem... Different motor winding, same everything else. 7kW vs 8.5kW peak power available, winding dependent. https://ebikes.ca/tools/simulator.html?motor=MX4504&batt=cust_84_.02_15&cont=cust_150_250_0.01_T&hp=0&cont_b=cust_150_250_0.01_T&motor_b=MX4503&batt_b=cust_84_.02_15&...
by serious_sam
Apr 19 2021 6:51am
Forum: EBike Technical
Topic: Modifying a Hub Motor
Replies: 55
Views: 1690

Re: Modifying a Hub Motor

To be clear, you are not rewinding the motor to be more "powerful" unless you achieve more copper density but you are changing the amount of voltage and current to suit your power supply This is nonsensical. Motor winding is independent of supply voltage and current. As explained above, r...
by serious_sam
Apr 14 2021 5:16am
Forum: EBike General Discussion
Topic: Best Phase Wire Connectors & MXUS 3kw stock wires
Replies: 9
Views: 295

Re: Best Phase Wire Connectors & MXUS 3kw stock wires

I changed my V3 3T motor wires out to 8AWG and regularly run 10kW. But you can't run that level of power sustained anyway. The motor just can't shed heat that fast. Short bursts with time to cool in between. So if you keep the original 12AWG motor wires as short as physically possible, they'd probab...
by serious_sam
Apr 06 2021 8:09pm
Forum: Battery Technology
Topic: Spot Welding Copper Strips to 18650 Battery Cells
Replies: 539
Views: 90217

Re: Spot Welding Copper Strips to 18650 Battery Cells

Better to have a rigid battery pack with compliant mounting to the board. A flexible battery pack is a terrible idea. IMO.
by serious_sam
Mar 23 2021 6:37am
Forum: EBike Technical
Topic: Modifying a Hub Motor
Replies: 55
Views: 1690

Re: Modifying a Hub Motor

Does anyone have any resources on how to rewind a motor for increased current draw? The controller is the thing that dictates current flow, not the motor. You can rewind the motor to produce more torque per amp (Kt=Nm/Amp), at the cost of a lower speed per volt (Kv=rpm/Volt). https://endless-sphere...
by serious_sam
Mar 20 2021 4:17am
Forum: Battery Technology
Topic: Why isn't "node charging" through the balance leads more common?
Replies: 44
Views: 1486

Re: Why isn't "node charging" through the balance leads more common?

The problem is that you don't need much deltaV to get 8A. Say your group has an IR of 10mOhms. 0.01x8=0.08V True. But I absolutely guarantee your balance wires + connector do not have a resistance of less than 10mOhms. That limits current as well. Which is fine - because the primary charge current ...
by serious_sam
Mar 17 2021 3:53pm
Forum: Battery Technology
Topic: Why isn't "node charging" through the balance leads more common?
Replies: 44
Views: 1486

Re: Why isn't "node charging" through the balance leads more common?

*If the pack is balanced... Even if it isn't balanced. It's very rare, for example, for one cell to take full charge current and the neighboring one to take zero. That's the only case in which you'd see full charge current through a balance lead. More often cells are somewhat out of balance, and th...
by serious_sam
Mar 16 2021 4:37pm
Forum: Battery Technology
Topic: Why isn't "node charging" through the balance leads more common?
Replies: 44
Views: 1486

Re: Why isn't "node charging" through the balance leads more common?

JackFlorey wrote:
Mar 16 2021 4:35pm
fatty wrote:
Mar 16 2021 12:01am
Are you referring to node charging each individual cell through the balance leads? Or traditional bulk charging with trickle balance through the balance leads?
Specifically I am saying that from the battery's perspective - those two are identical.
*If the pack is balanced...
by serious_sam
Mar 14 2021 6:38pm
Forum: Battery Technology
Topic: Spot Welding Copper Strips to 18650 Battery Cells
Replies: 539
Views: 90217

Re: Spot Welding Copper Strips to 18650 Battery Cells

I just tried the above, nickel plated steel with the 01.mm copper, and it works pretty well. You think that 0.1mm copper is enough for 30A ? I was looking at the ampacity chart i had found on a thread in this forum from Matador and it says that a 10mm by 0.1mm copper is good for 15 amps only. I jus...