Search found 598 matches

by 4Springs
Mon, 03 Jun 2013, 22:16
Forum: Technical and conversion discussion
Topic: Vacuum brake connection
Replies: 6
Views: 1178

Vacuum brake connection

Currently there are two vacuum brake reservoirs. This is a common way to maintain braking capacity should a line rupture. How exactly does this work? Is it really for if a line ruptures, or is it more likely to be for if your engine conks out? I could imagine that a good size reservoir would be a g...
by 4Springs
Mon, 03 Jun 2013, 03:22
Forum: Technical and conversion discussion
Topic: Vacuum brake connection
Replies: 6
Views: 1178

Vacuum brake connection

Is there a reason you want to remove the exsisting reservoirs - why not use them? It is a pain to make a new one. I am surprised at how effective my electric vacuum pump is. Even constantly pumping the brakes doesn't make the pump run full time. I'm no expert, but this was the way I went about it: I...
by 4Springs
Thu, 30 May 2013, 04:03
Forum: Members Machines
Topic: StudentEV's Daihatsu Conversion
Replies: 106
Views: 11189

StudentEV's Daihatsu Conversion

Kellys don't last long enough to be second hand http://forums.aeva.asn.au/smileys/smiley2.gif (Sort of joking, though I have witnessed a lot of failures over the years. Also the ones in the little silver cases lack the sustained power you need in a car, and the bigger ones seem to have a clumsy cur...
by 4Springs
Fri, 26 Apr 2013, 18:30
Forum: Electric motors and controllers
Topic: 0-5k Throttle Box
Replies: 3
Views: 1668

0-5k Throttle Box

Ok, I finally have some information to report on this topic. Resistive Throttle Box: The green resistors mentioned above were not good enough. I bought several of them, and each one failed within a few hours of driving. Following up on Jeff's suggestion above, I found that Bylong sell a replacement ...
by 4Springs
Thu, 25 Apr 2013, 00:08
Forum: AEVA WA Branch
Topic: Car insurance
Replies: 14
Views: 2113

Car insurance

Insurance was spoken about here:
Insurance: of the Comprehensive Kind
and here:
EV Insurance
by 4Springs
Mon, 08 Apr 2013, 00:03
Forum: Batteries, charging, management and monitoring
Topic: Controlling the 12v aux battery
Replies: 10
Views: 2056

Controlling the 12v aux battery

My setup is almost exactly the same as Zeva has described - IOTA DC/DC converter (tucked way up where no water will get at it) powered whenever the traction pack contactor is closed (charging or driving). I have a 7.2AH gel cell accessories battery, which goes flat after about 4 days inactivity. I g...
by 4Springs
Sat, 06 Apr 2013, 03:02
Forum: Members Machines
Topic: Ian Hooper's RX7 Conversion
Replies: 102
Views: 24676

Ian Hooper's RX7 Conversion

Congratulations Ian, looks fantastic, can't wait to hear how it drives! I investigated low-voltage cutouts which are designed to isolate the battery automatically if it's voltage gets too low, to avoid over-discharging it. The commercial options all seemed overpriced, so I designed my own. Pictured ...
by 4Springs
Wed, 03 Apr 2013, 13:58
Forum: Members Machines
Topic: StudentEV's Daihatsu Conversion
Replies: 106
Views: 11189

StudentEV's Daihatsu Conversion

By the way, I'll be selling my batteries at some stage. 12 x 140AH 12V deep cycle (AGMs). I don't imagine it will be in time for your project though, I'm hoping for another year or two out of them yet...
by 4Springs
Wed, 03 Apr 2013, 13:51
Forum: Members Machines
Topic: StudentEV's Daihatsu Conversion
Replies: 106
Views: 11189

StudentEV's Daihatsu Conversion

I ended up using a 9AH battery (the same type that my lawnmower uses). This is nice and small, giving me more space to fit things under the bonnet. There is a disadvantage though, it does run flat after about 4-5 days of inactivity. This is because there is a certain amount of current drawn even whe...
by 4Springs
Wed, 03 Apr 2013, 03:05
Forum: Members Machines
Topic: StudentEV's Daihatsu Conversion
Replies: 106
Views: 11189

StudentEV's Daihatsu Conversion

65AH sounds reasonable, but you'll need to do the maths. Think of a rainy dim day, when you will have your headlights, demister & wipers all going at the same time. On my car this adds up like so: Lights 400W (remember to add up all the lights!) Demister 100W Wipers - not sure, say 100W? Other thing...
by 4Springs
Wed, 27 Mar 2013, 02:40
Forum: Batteries, charging, management and monitoring
Topic: On board charging plug
Replies: 8
Views: 1368

On board charging plug

This is a Clipsal 56 series plug. It is a standard 10A plug with a screw connector which makes it dust and splash proof. It will plug into any outlet, but I find that most outdoor outlets have the matching socket, so I can do up the screw to give a bit more weatherproofing and strain relief. It just...
by 4Springs
Mon, 25 Mar 2013, 23:26
Forum: Batteries, charging, management and monitoring
Topic: On board charging plug
Replies: 8
Views: 1368

On board charging plug

Image

Image

Minimalist.
There is about 2 metres of cord on the plug. Pull it out and then push it back in. I had to blank off the hole to stop mud splashing up from the wheel.
by 4Springs
Sun, 10 Mar 2013, 23:44
Forum: Batteries, charging, management and monitoring
Topic: Low cost BMS
Replies: 441
Views: 60272

Low cost BMS

I suppose that more balancing resistors would be good, but with more resistors you may have to consider upgrading the transistor which switches them. I note that Neville's existing board produces about 2W when top balancing. I was thinking more along the lines of the same resistance over more resis...
by 4Springs
Sun, 10 Mar 2013, 21:33
Forum: Batteries, charging, management and monitoring
Topic: Low cost BMS
Replies: 441
Views: 60272

Low cost BMS

Hello Neville, I've downloaded DesignSpark, and had a go at re-designing the Cell Top circuit board to suit the SE130AHA cells. These cells use M8 bolts, 106mm apart. So my board has these changes: 1. Moved the + terminal to the left. Changed the terminal sizes to 13mm OD, 8mm ID. 2. Moved the balan...
by 4Springs
Tue, 19 Feb 2013, 03:06
Forum: General EV Discussion
Topic: EV insurance
Replies: 3
Views: 762

EV insurance

Insurance was spoken about here:
Insurance: of the Comprehensive Kind
by 4Springs
Tue, 12 Feb 2013, 00:13
Forum: Technical and conversion discussion
Topic: EV Sticker for Number Plates
Replies: 56
Views: 10353

EV Sticker for Number Plates

So what's the idea behind the EV sticker? Why is it important that someone in a car behind you (in the dark) can see that you are driving an EV?
by 4Springs
Sat, 09 Feb 2013, 02:15
Forum: Technical and conversion discussion
Topic: EV Sticker for Number Plates
Replies: 56
Views: 10353

EV Sticker for Number Plates

Or TAS.
by 4Springs
Sun, 27 Jan 2013, 22:30
Forum: Members Machines
Topic: Renard's BMW
Replies: 237
Views: 30393

Renard's BMW

Check out universities / research organisations for disused gas chromatography ovens. Usually the temperature programming on them is still highly accurate and the ramp times are very fast. Now there's an idea! We have GCs at work, and are just about to retire one. It still works fine, and would be ...
by 4Springs
Sun, 27 Jan 2013, 15:18
Forum: Members Machines
Topic: Renard's BMW
Replies: 237
Views: 30393

Renard's BMW

Ten days on and I've just finished 120 modules. Fantastic! Are you going for top or bottom balancing? I'm likely to attempt the same thing in a couple of months time, although a few less modules (probably 48). I have done a little SMD many years ago, but never with an oven, and had thought I'd just...
by 4Springs
Tue, 22 Jan 2013, 02:22
Forum: Technical and conversion discussion
Topic: Plug Braking
Replies: 16
Views: 2552

Plug Braking

The way I drive my vehicle I'm glad to have a clutch. I'll often sit at about 80kph (in 2nd), which is about 5000rpm, the maximum for my motor. Apparently it is more efficient at that speed, and gets more air through to cool it. So if I didn't have a clutch, and I wanted to change up a gear, I would...
by 4Springs
Tue, 22 Jan 2013, 01:57
Forum: Batteries, charging, management and monitoring
Topic: Upgrade to Lithiums
Replies: 32
Views: 3927

Upgrade to Lithiums

But is that 12000 including the old batteries? Coz you can minus that cost because hey should have payed for them selves by the time you change em :) Yes, 12000 includes 4000 for batteries and 400 odd for charger. I might even be able to get a few $ back if I can sell the old batteries again. My un...
by 4Springs
Mon, 21 Jan 2013, 02:29
Forum: Batteries, charging, management and monitoring
Topic: Upgrade to Lithiums
Replies: 32
Views: 3927

Upgrade to Lithiums

So 4Springs, with all the weight and space available, you could go for some EIG cells and have an epic pack. It won't be cheap though http://forums.aeva.asn.au/smileys/smiley6.gif I hadn't heard of EIG, so I went and looked them up. I can see what you mean about an epic pack! If I used 500kg of the...
by 4Springs
Mon, 21 Jan 2013, 01:56
Forum: Batteries, charging, management and monitoring
Topic: Upgrade to Lithiums
Replies: 32
Views: 3927

Upgrade to Lithiums

I have a new pack of 180ah batteries with bms and charger for sale at the moment :) it's a 27kwh pack if your interested :) I did notice your pack for sale, but I'm not ready to buy quite yet. My hope is that my current pack will let me know when it is getting towards its end of life, and that is w...
by 4Springs
Sat, 19 Jan 2013, 22:06
Forum: Batteries, charging, management and monitoring
Topic: Upgrade to Lithiums
Replies: 32
Views: 3927

Upgrade to Lithiums

The time has come to start thinking about lithium batteries for my ute. First step is to plan the required battery pack. Once I have that decided, I can start building the BMS (I’m keen on using Neville’s open source one). Here is my preliminary figuring, I thought I'd post it here so people can poi...
by 4Springs
Wed, 02 Jan 2013, 20:53
Forum: Electric motors and controllers
Topic: 0-5k Throttle Box
Replies: 3
Views: 1668

0-5k Throttle Box

My Kelly controller requires a 0-5k resitive throttle input. I've had a bit of trouble, and thought I'd share my thoughts. I bought one of these throttle boxes from EV Works: Throttle Box . They consist of a variable resistor mounted in a very robust steel assembly. There is also a microswitch that ...