Search found 564 matches

by 4Springs
Wed, 03 Apr 2013, 03:05
Forum: Members Machines
Topic: StudentEV's Daihatsu Conversion
Replies: 106
Views: 10280

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: 1275

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: 1275

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: 386
Views: 53962

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: 386
Views: 53962

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: 723

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: 8896

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: 8896

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: 28764

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: 28764

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: 2393

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: 3598

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: 3598

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: 3598

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: 3598

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: 1613

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 ...
by 4Springs
Fri, 21 Dec 2012, 17:16
Forum: General EV Discussion
Topic: EV Conversion Research
Replies: 17
Views: 2627

EV Conversion Research

Hello Pepe, my car (see the 4Springs' Brumby thread) is similar to your requirements, so I thought I'd add my 2 cents worth. My lead-acid battery pack gets me 50km range. This is with 140AH @ 144V = 20kW nominal. As Johny said, the 140AH that the battery manufacturers quote needs to be about halved ...
by 4Springs
Sun, 04 Nov 2012, 14:49
Forum: The Lounge
Topic: Solar scheme gone wrong
Replies: 32
Views: 3960

Solar scheme gone wrong

Just on the battery life question, I have a freind on a stand-alone solar power system. He has had the same bank of lead-acid batteries for about 20 years now, and reckons they are still fine. He did buy another set about 5 years ago to increase the time he can last without a sunny day...
by 4Springs
Wed, 10 Oct 2012, 23:04
Forum: Members Machines
Topic: TheMechwarrior's - Road Motorcycle EV Project
Replies: 48
Views: 5088

TheMechwarrior's - Road Motorcycle EV Project

Another option is to investigate other charging options at work. Do you know who owns the property opposite? They may allow us to charge there. Or charge in Westbury and walk in.
by 4Springs
Thu, 04 Oct 2012, 16:27
Forum: Members Machines
Topic: TheMechwarrior's - Road Motorcycle EV Project
Replies: 48
Views: 5088

TheMechwarrior's - Road Motorcycle EV Project

Hello Mech, As far a BMSs go, I've been interested in the DIY one here: Nevilleh's BMS . Not sure if it would suit you or not? Looks like his latest project is to fit the BMS to his bike. Do you have experience with electronics? I'd be happy to help you build one, it would be good practice for when ...
by 4Springs
Fri, 21 Sep 2012, 03:06
Forum: Members Machines
Topic: 4Springs' Brumby
Replies: 223
Views: 40187

4Springs' Brumby

Decided to check how balanced my batteries were: http://forums.aeva.asn.au/uploads/1844/Balancing.jpg My balancing zeners only work a little each time I charge, and I've only been charging since I've been driving - since about the 20th of August. The numbers across the bottom are the battery numbers...
by 4Springs
Fri, 21 Sep 2012, 03:03
Forum: Admin Notices
Topic: Image upload problem
Replies: 1
Views: 773

Image upload problem

It was giving me an error earlier, not that one, but it wouldn't upload images.
Seems to be working now though.
by 4Springs
Wed, 19 Sep 2012, 01:30
Forum: General EV Discussion
Topic: Battery pack voltage advice for EV datsun 1200
Replies: 44
Views: 6363

Battery pack voltage advice for EV datsun 1200

but the extra work was worth it ? correct? Yes, although at one point I certainly thought it was all too much work. Possibly it was when jacking up a 40kg battery from underneath the car into place, only to find that it was 3mm too big! Everyone is surprised when I show them the tray, they all expe...
by 4Springs
Mon, 17 Sep 2012, 23:18
Forum: General EV Discussion
Topic: Battery pack voltage advice for EV datsun 1200
Replies: 44
Views: 6363

Battery pack voltage advice for EV datsun 1200

Solar panels - cool! And at 200W, would only take 34 hours to charge! I wonder if you could rig it so that you could tilt the hard cover towards the sun. Or it might not make much difference that far north? NQLD means that you don't have to worry about the battery temperatures, so your battery boxes...
by 4Springs
Mon, 17 Sep 2012, 22:16
Forum: General EV Discussion
Topic: Battery pack voltage advice for EV datsun 1200
Replies: 44
Views: 6363

Battery pack voltage advice for EV datsun 1200

Congratulations on another EV on the road! Looks nice and tidy under that bonnet. Any more details/pics? I'd like to see how the rest of the batteries are mounted. Whenever I see someone using clear plastic I can't help but wonder how much cleaning they'll have to do... Here is the zener balancing t...