AEVA Forums

francisco.shi wrote: ↑Fri, 31 May 2019, 10:50 Is that after it is assembled with the bus bars and holder?

No that’s just based on the specs of the cells. This is just a temporary pack that I’m using for testing. Still haven’t decided exactly what the final pack will be.

Great, thanks for the link!!!

francisco.shi wrote: ↑Fri, 31 May 2019, 07:32 What is the energy density of the finished battery pack? (Wh/kg)

According to the specs, the Headway 15ah are 105 Wh/kg

One problem I've run into is the gap between the brake rotor and the motor is pretty small so the original brake caliper doesn't fit! IMG_7037.JPG I contacted QS Motor and they recommended a few from their catalog that would work. Ended up getting this one in grey. I'll need to get a new mounting br...

I struggled trying to get the controller to do the angle identification setup and control the motor but got there in the end. I did swap the positions of the hall sensor A and C wires in the connector so they matched the controller connector side. That didn't seem to fix it straight away but after r...

Also put together a test battery pack using 24 x 15ah Headway cells to do some bench testing.

Made some more progress removing the engine from the frame. The engine weighs 40kg.

Looking for a descent second hand charger for a motorbike project: Item: 72V onboard charger for LiFePO4 Item Condition: New or used Reason for purchase: Motorbike conversion Price range: Under $300 Payment Method: Whatever works Pickup Method: Australia Post or pick up in Sydney Extra Info: Does no...

In my excitement to get started, I forgot to weigh the front and back to get the weight distribution of the original bike before taking it apart :o So after putting everything except the seat and fairings back on and picking up a couple of bathroom scales from Bunnings, I now have the numbers Front:...

Received the bike last week and started removing the ICE related bits that I won't be needing. One thing that I didn't expect to find was the coolant runs through the frame of the bike. There's a bolt on the lowest part of the frame used to drain the coolant out which I've done but now I'm wondering...

Sold!

Bought this second hand on eBay when I thought my other controller had died but then realised the LVC setting was higher than my test battery pack :shock: so don’t need this anymore. I’m not sure if the previous owner ever used it as there are no scratches on the flanges where you bolt it down and I...

Excellent, thanks for the help ... now have to work out how to arrange different size cells together into a pack!

Got it, thanks.

Also by paralleling each 10Ah and 15Ah together first they can be monitored as one “cell” and I only need 1/2 the number of BMS?

Thanks that’s good news but I’m curious why the 10Ah cells don’t run out of energy first and hit low voltage before the 15Ah cells?

Hi everyone,

I didn’t plan it this way but I’ve ended up with 22 x 10Ah Headways and 22 x 15Ah Headways.

Can I put all the 10Ah cells together in series to make 72V and the same with the 15Ah cells, then put these together in parallel to make s bigger capacity 72V pack?

Thanks!

@jonescg and @antiscab thanks for the info. Good to validate with real world numbers!

francisco.shi wrote: ↑Wed, 24 Apr 2019, 12:28 I can build the pack for you and wire the BMS if you give me dimensions.

Sounds interesting, I’ll PM you what I’m after. Thanks!

Would leaf cells actually fit your bike? No idea ... I’m waiting for the bike to come down from QLD to see what space I have to play with but that’s a good point, they do look pretty big. Those Yinlong LTO cells look pretty good, have you used them on a project before? From what I’ve read, the main...

francisco.shi wrote: ↑Wed, 24 Apr 2019, 07:12 I am trying to get a group buy for some LG 63Ah cells. Would you consider getting some?

Thanks but I'm not sure I'm up to building a pack from pouch cells ... I think I'm more of a bolt together kind of a guy

Also the motor arrived today and nervously checked to make sure the custom axle fits into the swingarm and thankfully it does! B223B308-0553-48C2-9162-549D10798B54.jpeg 118B0200-FB4E-45BF-B255-CFE49831F5F2.jpeg Next steps are to install the brake and work out an adapter plate to attach the bike’s or...

The other side was 12600Wh and 161miles/260km for city usage. This is 50Wh/km. So the 30 cells of LTO 40Ah is 72V x 40Ah = 2880Wh x 0.8 DOD = 2304Wh / 50Wh = 46km. So there is nearly double the difference depending on how you ride. But at least it is a place to start. That’s great, thanks for clari...

This is the donor bike I just bought. The previous owner put a lot of TLC into it so it looks like it’s in really good condition. As mentioned I selected this bike because of the size of the rear rotor :lol: but turns out it’s a really good bike and one of the better 250’s from that era. 26F67F01-FA...

Here are some pics of the custom axle and motor

Because the axle is built into the motor and needs to be held firm while the motor spins, there will be a lot of torque where the axle passes through the swingarm. To make this stronger I’m going to use solid blocks of aluminium? inside the swingarm. The tolerances need to be quite tight as there ar...