AEVA Forums

The NSR is complete! And I've done a write-up of the conversion including lots of photos here: http://zeva.com.au/Projects/NSR/ I haven't clocked up many K's on the bike yet and I'm not sure what its range is, but it is a lot of fun to ride. Here are a few recent pictures.. The battery module just b...

The 26650EV cells are 83g for a 3.2V 3.2Ah cell, which comes out at 123wh/kg. Pretty good for LiFePO4. From memory the 20Ah A123 pouch cells were also about that energy density, but much higher power and better packing / volumetric density. They'd probably be my first choice for a motorbike pack (if...

It's a home-made capacitive discharge spot welder: http://zeva.com.au/Projects/SpotWelderV2/ I wouldn't recommend building big EV battery packs this way in general though. It's a heck of a lot of work. The only reason I went this route was because I had lots of these cells lying around from a cancel...

I thought it was about time I uploaded some pics of the NSR150 conversion. The project has been progressing well, hopefully it'll be rideable in the next couple of weeks. The motor I'm using is a Motenergy ME1003, a pretty torquey little permanent magnet DC motor. At 600A max it should put out a bit...

Very interesting.. Still way above the average car buyer's price range - which includes me http://forums.aeva.asn.au/smileys/smiley19.gif - but their quality and performance puts them in competition with BMWs and Mercedes, so they could sell pretty well. If I were rich (and less sentimentally attach...

Hah, I was thinking the same thing while I was screwing them in.. I didn't have any suitable black screws handy, but I'll get some.

The RX7 gained a new addition today - a new display module for my EV Management System, aka the EVMS Monitor V2, which talks over CAN bus to the EVMS Core and BMS modules for providing instrumentation to the driver. It's something I've been working on for the last month or two, to replace the somewh...

Some figures for you: John Wayland's White Zombie has a claimed 1050Nm of torque from the twin motors at 2000A. Pretty sure he has ADC motors, not sure if it's the 8" or the 9". Mike Willmon's Ford Pinto conversion uses dual 9s with a Z2K controller and gets "over 1000Nm". My RX7 uses dual Impulse 9...

If anyone happened to get any pics of my RX7 out on the test track in the afternoon (sacrificing my tires for the greater good), I'd be interested to get a copy..

Hi Greg, yes it is still available - PM me if interested to discuss further?

Fantastic idea! Happy to do what I can to help. Let's chat about it next time we catch up.

Gosh, how confusing. I thought the Kilovacs were marked with + and - and the Gigavacs A2 and A1. So the Kilovacs have +A1 and -A2.. And the Gigavacs appear to have -A1 and +A2: http://www.greegoo.cn/UploadFilesother/gx14-dimension-1.jpg One would be forgiven for getting confused. But I think we're i...

Yep I'm pretty sure Johny is correct, and the quote from EV Source (for conventional current). + (Kilovac) or A2 (Gigavac) should be the anode, where conventional current flows in. - (Kilovac) or A1 (Gigavac) should be the cathode, where conventional current flows out. I kinda wish they just labelle...

Hi all, FYI I've just added a quick update to the build blog, covering the installation of the new CAN-based BMS and EVMS - direct link to the post here: http://www.zeva.com.au/Projects/RX7/?section=testingLicensing#Jan2014Update http://www.zeva.com.au/Projects/RX7/Pics/BMS12_Closeup.jpg Pic of the ...

An interesting discussion on a topic which has been on my mind a lot lately. I've eked out a living in the conversion world for some years now but have had to diversify over the last 12 months to stay afloat, and may soon get out of this game altogether (well, except for personal interest). The EV c...

Time to introduce my new EV project, conversion of a 2001 Honda NSR150: http://forums.aeva.asn.au/uploads/112/NSR1.jpg This bike has actually been sitting in pieces in my workshop for a couple of years now, after I partially disassembled it one day after getting sick of the unreliable old 2-stroke d...

No, sorry, I only have the controller. (The vehicle it was in briefly had a 0-5V twist-grip throttle which I was adapting for the Alltrax with a digital pot adapter to make it 0-5Kohm, but I ended up swapping a bigger Kelly in and using the 0-5V throttle input instead.)

Bump and price drop to $150!

Hi Angelito,

In fact it is still here, sitting on a shelf in my workshop! I'd almost forgotten about it

It is for 48V systems, DC motors, up to 400A motor amps.

I wonder why IGBTs lend themselves to 3-phase inverters more than DC speed controllers? Faster switching maybe? It's more to do with efficiency at various voltage levels. Up to about 200V, MOSFETs win hands down. You'll probably find all controllers rated up to 200VDC will be MOSFET based, includin...

It's been a while since my last update so I thought I'd write up the latest news. Soon after my last post, I took the Zilla controller out again and bit the bullet - shipping the whole lot back to Manzanita Micro for repair. They were able to reproduce the fault and ended up simply replacing the who...

Thanks. Likewise, over the years my thinking has migrated away from the need for high energy shunts, after calculating/estimating how little balancing is required to maintain pack balance. I believe it's in the order of 1% per year drift, e.g two similar 100Ah cells might end up 1Ah apart after a ye...

The bypass resistors are the little SMD 100ohm ones near the quick-connect terminals along the bottom. I decided an interesting way to go would be to use very weak shunt resistors - only ~35mA shunt current - but leave them on for a relatively long time. So the microcontroller maintains shunt timers...

Hi all, Time to reveal the new BMS project I've been working on! Developed in part to fill the requirements of one of my clients, but intended for general EV use as well. (I'll be building a set for my RX7 in the near future.) In brief it's based around the LTC6802 BMS chip for cell monitoring and s...

That CHAdeMO jump starter is pretty cool. Looks like the sort of thing RAC might have in their service vehicles in the future.

I wonder what sort of $ they'll be..