Search found 460 matches

by 4Springs
Today, 06:26
Forum: General EV Discussion
Topic: Offer for all members Friday 9am WST
Replies: 11
Views: 174

Re: Offer for all members Friday 9am WST

I'm not sure that the specifications are correct for the 220Ah version - they are exactly the same as the 460Ah version except for the weight. Even lists the capacity as 460Ah!
by 4Springs
Today, 06:23
Forum: General EV Discussion
Topic: Offer for all members Friday 9am WST
Replies: 11
Views: 174

Re: Offer for all members Friday 9am WST

They are very light for LFP. I can see why they were going to use them in buses. I could make a 10kWh 'generator'. Plug it into the 240V to charge up, then it provides 240V output. Use it as a range extender for the Brumby (charger on while driving), and as an AC coupled home storage battery. The ba...
by 4Springs
Fri, 08 Jun 2018, 18:45
Forum: Parts & Suppliers
Topic: Heat Conductive Materials
Replies: 7
Views: 255

Re: Heat Conductive Materials

if yuo can be sure it won't leak out the bottom or the sides, loosen it off, fill 'er up, and tighten the clamp again. No, definitely can't seal the bottom or sides. Even if I could, I doubt that it would fill the spaces well, there would be air bubbles everywhere. I'm going to have to take the she...
by 4Springs
Fri, 01 Jun 2018, 15:34
Forum: Parts & Suppliers
Topic: Heat Conductive Materials
Replies: 7
Views: 255

Re: Heat Conductive Materials

There is also goop in a tube which might be more practical to apply. AS1803-310ML Farnzy has some about $40/tube 8497400. For those following along at home, the last line of Richo's post means that the online-retailer called Element 14 sells this product. He's nicknamed it Farnzy, presumably becaus...
by 4Springs
Wed, 30 May 2018, 16:12
Forum: Parts & Suppliers
Topic: Heat Conductive Materials
Replies: 7
Views: 255

Heat Conductive Materials

Does anyone know of a heat-conductive material suitable for ensuring heat transfer between my motor and cooling coils? The motor is 270mm in diameter, and is surrounded by copper tubing which coils around it. The motor is not smooth, and the coils are not even, so there is probably little actual con...
by 4Springs
Thu, 17 May 2018, 18:05
Forum: Technical and conversion discussion
Topic: Prelude conversion project - some questions
Replies: 53
Views: 1893

Re: Prelude conversion project - some questions

Details on that heat exchanger? It looks a neat little unit.
by 4Springs
Sun, 13 May 2018, 06:03
Forum: Batteries, charging, management and monitoring
Topic: Arvio 3.5kWh drop-in-battery-replacement supercapacitor on sale
Replies: 337
Views: 14041

Re: Arvio 3.5kWh drop-in-battery-replacement supercapacitor on sale

Oh dear... https://www.gumtree.com.au/s-ad/brisbane-city/building-materials/off-grid-5kw-syst-with-safe-supercapacitor-batteries-62p-w/1178196224 Very professional-looking organisation there. I'd be interested in their Lithium Iron batteries but there doesn't seem to be any info! http://polygreenso...
by 4Springs
Mon, 16 Apr 2018, 16:05
Forum: Charging Infrastructure
Topic: The Energy Retailers Strike Back. Will Cheap Off Peak Rates Kill Battery Storage?
Replies: 14
Views: 417

Re: The Energy Retailers Strike Back. Will Cheap Off Peak Rates Kill Battery Storage?

It won't be long until off peak is basically 10pm until 3pm. The battery only needs to be big enough to last until off peak starts for best economics. Our electricity product has two off-peak times, one is 10:00-16:00, the other is 21:00-7:00. Peak price is 30c, off-peak 14c, feed-in is 10c. I wond...
by 4Springs
Sat, 31 Mar 2018, 08:23
Forum: Batteries, charging, management and monitoring
Topic: Arvio 3.5kWh drop-in-battery-replacement supercapacitor on sale
Replies: 337
Views: 14041

Re: Arvio 3.5kWh drop-in-battery-replacement supercapacitor on sale

https://youtu.be/m_hyyQ5-d0E Super capacitor charge test Nobody has commented on the contents of this video yet! I'm waiting with bated breath! I've charged a lithium battery or two in my time, but never a supercapacitor. The results look like what I'd expect with a battery - what would the differe...
by 4Springs
Fri, 30 Mar 2018, 11:06
Forum: Technical and conversion discussion
Topic: Prelude conversion project - some questions
Replies: 53
Views: 1893

Re: Prelude conversion project - some questions

I'm wondering if a thermostat can be set up so that if you're parked in the sun all day, the AC can come on if needed. Seems quite energy intensive though. Doesn't sound too hard, you'll need a thermostat anyway in normal running. If you need it to run when nobody is in the car it would be much mor...
by 4Springs
Fri, 30 Mar 2018, 04:41
Forum: Technical and conversion discussion
Topic: Prelude conversion project - some questions
Replies: 53
Views: 1893

Re: Prelude conversion project - some questions

I figure a heat exchanger just before the blower is a good place to chill the battery coolant. Being tied directly to the air conditioning, whenever the driver is hot enough to need AC, the battery will get some of it too. I'm no expert, but my thought is that having the heat exchanger after the bl...
by 4Springs
Wed, 21 Mar 2018, 17:24
Forum: Charging Infrastructure
Topic: Home charging outlets - load sharing
Replies: 5
Views: 275

Re: Home charging outlets - load sharing

My off-peak tariff runs from 9pm to 7am, so can pull 70kWh from the grid over that period. In the hypothetical future I'd like to have my families Leaf and Model 3 (which have done 20-30 km each commuting), and a friend's Kona (who has driven 200 km from Launceston to stay overnight) and have the a...
by 4Springs
Wed, 21 Feb 2018, 18:08
Forum: Charging Infrastructure
Topic: Plugshare - outlet types
Replies: 22
Views: 1846

Re: Plugshare - outlet types

Is a "Wall outlet 3112 " a 3 pin Australian GPO style socket ? I have installed a J1772 socket in my EV conversion. My charge cord is a J1772 with a regular 3 pin 15A plug on the other end to suit the 15A outlet in my shed. The closest public charge points (within battery range ) to me are listed a...
by 4Springs
Mon, 22 Jan 2018, 13:54
Forum: Nissan Leaf
Topic: 2nd Hand LEAF
Replies: 23
Views: 1523

Re: 2nd Hand LEAF

Doesn't have to be serviced by Nissan.
There is a mechanic in Smithton that will service them, so it might pay to call around smaller mechanics to see if there is someone who is willing to take it on.
by 4Springs
Mon, 08 Jan 2018, 17:13
Forum: For Sale/Wanted
Topic: Help required with school assignment
Replies: 16
Views: 7838

Re: Help required with school assignment

These 4.8kW 36V Series DC are pretty close. Rip off the brake and you have dual shaft?!? http://billsmachinery.com.au/product/drive-and-brake-motor/ Any idea what RPM those would do Richo? The power looks good as an approximation before we get any actual specs. His first post suggests that a dual s...
by 4Springs
Mon, 01 Jan 2018, 18:13
Forum: For Sale/Wanted
Topic: Help required with school assignment
Replies: 16
Views: 7838

Re: Help required with school assignment

Hi there, I’m new on here and have came to Ask for help and information for my daughter. Her year 12 project for automotive is an old ride on lawn mower, that was kindly donated to her for this assignment. Besides looking old and tired the engine is the only thing that’s really stuffed. I thought s...
by 4Springs
Mon, 01 Jan 2018, 17:31
Forum: Batteries, charging, management and monitoring
Topic: Labelling of Battery Compartment ???
Replies: 5
Views: 746

Re: Labelling of Battery Compartment ???

where does one obtain such labels , I have the usual lightning bolt stickers but they give no indication of chemistry, or do I just write "LiFePo4" on the boxes with a Sharpie ?? My interpretation led me to get some yellow labels made up: DSCN4254.JPG These were made by my local trophy shop. It is ...
by 4Springs
Mon, 01 Jan 2018, 16:46
Forum: General EV Discussion
Topic: Driving an EV in slow moving traffic?
Replies: 10
Views: 667

Re: Driving an EV in slow moving traffic?

I go between our DC conversion (Brumby) and our Outlander. The Brumby has no creep and no regenerative braking. It has a 'clunk' as described by weber, where if you start out from a standstill the motor gets up a bit of movement before all the play in the drivetrain is taken up. I can stop this clun...
by 4Springs
Tue, 12 Dec 2017, 17:48
Forum: Nissan Leaf
Topic: 2nd Hand LEAF
Replies: 23
Views: 1523

Re: 2nd Hand LEAF

Seems like there's not a Leaf in circulation in Australia with more than 100 km range on a good day... There's range and there's range though. I find that production cars are very optimistic with their estimations when their batteries are full (i.e. the 'guessometer'), but pessimistic with their em...
by 4Springs
Tue, 24 Oct 2017, 04:43
Forum: General EV Discussion
Topic: EV Motor Durability
Replies: 8
Views: 482

Re: EV Motor Durability

To give you an idea of the inefficiencies of a DC motor, I ran the DC motor in my car at one point without load to wear in the brushes. 17 hours of running with no load used 15kWh of electricity. Extrapolate that out to 24 hour a day operation gives 21kWh required per day just to keep the motor spin...
by 4Springs
Tue, 24 Oct 2017, 04:37
Forum: General EV Discussion
Topic: EV Motor Durability
Replies: 8
Views: 482

Re: EV Motor Durability

A DC EV motor? Wire it for shunt mode (so you don't need a controller) and keep an eye on it to make sure it doesn't overheat. Should last for a long time. 120 horsepower (90kW) is a huge load. That's 39 10A outlets at full capacity. antiscab's 14kW motor would only do one sixth of that power. Do yo...
by 4Springs
Tue, 17 Oct 2017, 15:52
Forum: Batteries, charging, management and monitoring
Topic: Chinese DC-DC converter
Replies: 12
Views: 590

Re: Chinese DC-DC converter

So to be legal do I need to send it off to a lab for Australian certification , or just get the seller to certify it , or can I just test it with my DMM ? Can't test it with a DMM as it won't generate a high enough voltage. I think you'd need a megger? Electricians have them. I'd ask advice from so...
by 4Springs
Tue, 17 Oct 2017, 14:50
Forum: Mitsubishi
Topic: 10 Amp charging
Replies: 69
Views: 4816

Re: 10 Amp charging

Thanks @4Springs. The light comes on all the time and doesn't change with any flexing of the input cable. However, the RCD test button doesn't do anything so I'm guessing the input is OK, but there's either a problem within the RCD relay or between it and the input cable within the box itself. Ah, ...
by 4Springs
Tue, 17 Oct 2017, 14:42
Forum: Batteries, charging, management and monitoring
Topic: Chinese DC-DC converter
Replies: 12
Views: 590

Re: Chinese DC-DC converter

OK thanks, where would I find the Australian requirements, other than NCOP14 ? I cant find anything in there about isolation where it mentions auxilliary ELV , obviosly when I turn the car off the DC-DC converter will be isolated by a seperate relay , or am I missing something. ? The requirements a...
by 4Springs
Tue, 17 Oct 2017, 14:37
Forum: Batteries, charging, management and monitoring
Topic: Chinese DC-DC converter
Replies: 12
Views: 590

Re: Chinese DC-DC converter

Size: 30*19*15mm - seems a tad small! The photo looks more like 100mm long which would be more like it.
Max output current 32A. You'd need two I think, but still good for the price.