Recent content by ecustom

Here is how I will build and mount the battery pack.

Long time since last post. It took a long long time to get the motor, and now when I finally have it it is without the required axle modifications. When it was finally manufactured (after a two month long, "no, we're not going to build it") it was without the discussed modifications, and I just...

Thanks for the controller tip. Seems that it might fit. I am still open for more suggestions though. I'm hoping 4 such modules will be enough. Next step up would be 6 modules and that would require much more space and also the modules are 12kg. I think 48kg is a good round number. 7.1kWh should...

While I certainly am no expert (no experience - yet) I will throw some discussion points in there regarding your pack. That 12V LiFePO4 pack is really a 4s1p pack with cells having 3.3V nominal (and a 30Ah capacity). So what you are considering is a 28s2p pack giving you 92.4V nominal (using 14...

Would you be so kind and provide a link to the post/BMS you are referring to? I found a "Bluetooth BMS" thread and it seems to contain a lot of different BMS advice. Are you referring to the ANT BMS, because seems to only support 24S? (https://www.aliexpress.com/item/32826820690.html) Also, can...

I got my hands on four 48V37Ah battery modules. Each modules is 13s1p and I plan to wire them up 26s2p which, according to documentation, it should give me the following specs: Continuous discharge current 246A, Maximum discharge current (10sec) 670A -> Continuous power 32.35kW and peak power...

Do you have any kind of cooling on the controller?

There is nothing in the pin out of the controller that contains the same information? If so you could have that pin drive a led in your dashboard.

Clickbate headline. The article is more about Lime’s operating model and whether or not it would be better if their customers took the bus than it is about electric transportation. Clickbate headlines makes me sad and angry. Stay honest.

A motor getting warm is expected. A BLDC motor is around 90% effective meaning the other 10% or so is mechanical and electromechanical losses that will dissapate in heat. If you can touch the motor it is not hot enough to damage the motor. I would assume any motor is designed in such way that...

Alright, so order has been placed for a 10kW hub motor (with controller and contactor). I'm hoping to get it in about a month or so. In the meantime I am trying to figure out what tire to get. QS Motor recommends (according to website) 180/70-17 to 220/70-17, and I am having trouble finding any...

To be fair. It is an exhibit. The rest of the museum probably has a lot of museum-stuff in it. Many inspiring pictures. Thank you for them!

I have got partial reply from QS. They say that they can only offer rim size of 17" instead of 15" as I want. They also say they can custom make a longer axle, but that it will take over a month. No issue with that. They can also offer same motor size with 8kW, 10kW and 12kW. No prices given...

I am not at all discarding hub motors. They are my primary choice. I just sent QS motor an inquiry. Lets hope they have good news. I might be able to sell the old petrol engine for change.

Being able to take out 40kW for a couple of seconds sounds awesome. I am just concerned that 8kW will not be enough to sustain 100km/h. If I calculate with a drag coefficient of 0.5 I get that roughly 8kW is needed to drive a motorcycle in 100km/h. But the listed drag coefficient for motorcycle...