Search found 482 matches

by 4Springs
Sat, 15 Sep 2018, 16:13
Forum: Technical and conversion discussion
Topic: Reverse-cycle (heat pump) heating
Replies: 20
Views: 2385

Re: Reverse-cycle (heat pump) heating

Well, I bought some (thermally) conductive goo, as discussed over in this thread: http://forums.aeva.asn.au/viewtopic.php?f=51&t=5555 I ended up buying the stuff that Richo suggested, part number 8497400 from Element 14. This is a white paste with the consistency of putty. I squeezed it in around th...
by 4Springs
Wed, 05 Sep 2018, 16:30
Forum: Renewable Energy and Storage (Non-EV)
Topic: 250 kW Wave Generator
Replies: 7
Views: 305

Re: 250 kW Wave Generator

Hope it comes with an instruction manual!
by 4Springs
Tue, 04 Sep 2018, 19:16
Forum: Renewable Energy and Storage (Non-EV)
Topic: 4Springs' Home Battery Storage System
Replies: 9
Views: 507

Re: 4Springs' Home Battery Storage System

I found a very secondhand cupboard in the shed. Now relocated to the garage: IMG_20180903_081346937_HDR.jpg What's inside? IMG_20180903_163916167.jpg IMG_20180903_152648729.jpg I've strapped these up with the strapper I've only ever used once before. There are pieces of wood at the ends of the rows....
by 4Springs
Fri, 31 Aug 2018, 19:07
Forum: Electric motors and controllers
Topic: Hyundai Ioniq Hybrid motor
Replies: 18
Views: 706

Re: Hyundai Ioniq Hybrid motor

Ah, the photos didn't appear in your first post, just image icons that don't seem to open. @T1 Terry, the images have always been visible here, not sure why you couldn't see them. You might want to try force-refreshing your browser (<ctrl><F5> on most PC browsers) and see if that makes any differen...
by 4Springs
Sat, 25 Aug 2018, 06:56
Forum: Renewable Energy and Storage (Non-EV)
Topic: 4Springs' Home Battery Storage System
Replies: 9
Views: 507

Re: 4Springs' Home Battery Storage System

But half the charge cycles per 12kwh unit? Still uncommitted and watching the tech talk with interest. Indeed, half the charge cycles, but the cycles are deeper and the charge/discharge rate is higher. Depth of Discharge: If you have your cells arranged in a 23kWh battery, and take out 10kWh, you h...
by 4Springs
Sat, 25 Aug 2018, 06:20
Forum: Renewable Energy and Storage (Non-EV)
Topic: 4Springs' Home Battery Storage System
Replies: 9
Views: 507

Re: 4Springs' Home Battery Storage System

With lower sunshine energy in Tasmania, particularly in winter, My house, also in Tasmania in winter, seems to be a poster child for a 20kWh battery. We have a 10kW solar array, a 7kW inverter, two people and two EVs. Here are our figures for the past week: Sunday: consumed 19kWh, produced 32kWh, s...
by 4Springs
Fri, 24 Aug 2018, 15:49
Forum: Batteries, charging, management and monitoring
Topic: Storing your LFP cells
Replies: 10
Views: 552

Storing your LFP cells

I've been prompted to give some advice on how to look after your LFP (lithium ferro-phosphate, or LiFePO4) cells in storage. Posting it here means that others can see it, and people more expert than me can pick it apart! Particularly aimed at those with the Brighsun (ex-AVASS) cells, since some of u...
by 4Springs
Wed, 22 Aug 2018, 19:41
Forum: Renewable Energy and Storage (Non-EV)
Topic: 4Springs' Home Battery Storage System
Replies: 9
Views: 507

4Springs' Home Battery Storage System

Some ramblings on my intentions for my Brighsun cells. I have 32 of the 220AH units - I missed out on the 23kWh batteries, settled for two of the 11kWh units. Managed this because we have two AEVA members in the household. So slightly less power for twice the price! We have a 10kW solar array with a...
by 4Springs
Mon, 20 Aug 2018, 19:08
Forum: Renewable Energy and Storage (Non-EV)
Topic: Low Cost BMS for Home Storage Batteries
Replies: 9
Views: 921

Re: Low Cost BMS for Home Storage Batteries

I've done some work on the BMS module board to fit the Brighsun cells. Here is the version I made for my car: CellTopBMS-SE130AHA_1.jpg I had some notes on this version: 1. The board was a bit wide at the terminals. Some boards had to be trimmed a bit narrower to sit on top of a certain type of batt...
by 4Springs
Sat, 18 Aug 2018, 05:54
Forum: Nissan Leaf
Topic: Non OEM Leaf battery upgrade?
Replies: 14
Views: 619

Re: Non OEM Leaf battery upgrade?

Nice - any idea on price? With a bit of research, maybe a clever simple cooling system could be added too. Or in my climate - a battery heater! I assume that battery warming pads wouldn't be too hard to fit in. These are the ones I use in my home-build: https://wolverineheater.com/products/model-bh-...
by 4Springs
Sun, 12 Aug 2018, 16:28
Forum: Technical and conversion discussion
Topic: Reverse-cycle (heat pump) heating
Replies: 20
Views: 2385

Re: Reverse-cycle (heat pump) heating

Cold again, so I've been working on this heatpump, trying to get it more efficient. I've decided to put a heatsink on the evaporator coils around the motor. I had various ideas, but eventually settled on something fairly cheap and simple. Took quite a lot of work to make though. I bought some alumin...
by 4Springs
Sun, 12 Aug 2018, 15:01
Forum: Renewable Energy and Storage (Non-EV)
Topic: Low Cost BMS for Home Storage Batteries
Replies: 9
Views: 921

Re: Low Cost BMS for Home Storage Batteries

Hi Chris, I haven't looked on here for years, been busy with other stuff, but i am wondering if this project ever got off the ground? Nice to know my old BMS stuff still has relevance! Neville Hi Neville, good to hear from you! Every couple of months I'm at a car show somewhere, showing someone the...
by 4Springs
Tue, 31 Jul 2018, 15:07
Forum: Nissan Leaf
Topic: Nissan Leaf Battery Flattening Test
Replies: 3
Views: 352

Nissan Leaf Battery Flattening Test

Has anyone had their Nissan dealer recommend that they flatten their battery on a routine basis? A member has had this advice, that he should run the car almost flat, then turn on the heater flat-out until the car completely dies. Then charge it up again, and repeat a couple of times over the follow...
by 4Springs
Sun, 29 Jul 2018, 06:58
Forum: Blade EVs
Topic: LONG DISTANCES IN A BLADE
Replies: 11
Views: 1030

Re: LONG DISTANCES IN A BLADE

Newbie Question: Is it possible to range extend a Blade by carrying a little generator in the boot? Find out what current the Blade charger draws. Then check just how "little" a generator is that will supply that current continuously. Generators are often sold on the peak power output, but you shou...
by 4Springs
Fri, 20 Jul 2018, 15:22
Forum: Renewable Energy and Storage (Non-EV)
Topic: Brighsun 220Ah cells
Replies: 25
Views: 1793

Re: Brighsun 220Ah cells

When I made the comment about making a "u-shaped" version, I naively thought that it would just be a bit of tweaking in the design software, post to the manufacturer and get a few spat out. I'd forgotten about the setup costs. That said, what kind of overhead is involved? With this batch of specifi...
by 4Springs
Sun, 15 Jul 2018, 06:13
Forum: Hyundai
Topic: Hyundai Australia Kona EV info
Replies: 42
Views: 3267

Re: Hyundai Australia Kona EV info

reecho wrote:
Sat, 14 Jul 2018, 14:57
And this car will put the biggest dent in all the Model 3 pre-orders that Tesla have in Australia.
If it gets here before the Model 3. Based on past experience I'm not holding my breath!
by 4Springs
Thu, 12 Jul 2018, 16:40
Forum: Hyundai
Topic: Hyundai Australia Kona EV info
Replies: 42
Views: 3267

Re: Hyundai Australia Kona EV info

Hey - according to that article it has wireless inductive charging!! :o
by 4Springs
Thu, 12 Jul 2018, 16:36
Forum: Hyundai
Topic: Hyundai Australia Kona EV info
Replies: 42
Views: 3267

Re: Hyundai Australia Kona EV info

I Repeat it's a hatchback. Yeah, you don't have to repeat it. I will though - it's a hatchback. A very nice looking hatchback that might just fit our needs. As long as it can tow (like the ICE Konas) and as long as the seats fold down to make a flat cargo space (unlike the ICE Konas). We'd be repla...
by 4Springs
Sun, 01 Jul 2018, 06:31
Forum: Renewable Energy and Storage (Non-EV)
Topic: Low Cost BMS for Home Storage Batteries
Replies: 9
Views: 921

Re: Low Cost BMS for Home Storage Batteries

I think the best thing to do is put them all in parallel and leaver them like that for a week while the all reach the same state of charge. Should make the balancing job a bit easier. I did this with the LFP cells for my car. 45 of them. The way I did it was to loosely put bolts in the terminals, l...
by 4Springs
Tue, 26 Jun 2018, 17:57
Forum: Renewable Energy and Storage (Non-EV)
Topic: Low Cost BMS for Home Storage Batteries
Replies: 9
Views: 921

Re: Low Cost BMS for Home Storage Batteries

Hi Christopher, This looks like a great project. I'd like to help, but the soldering puts me off, I've never been much good at it. I followed your link to the BMS you made for your car and read in the Wiki that another option could be to get the whole board manufactured. Would this add much to the ...
by 4Springs
Sun, 24 Jun 2018, 06:17
Forum: General EV Discussion
Topic: Offer for all members Friday 9am WST
Replies: 13
Views: 1332

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! No, hang on, I'm wrong. The dimensions are not the same, the 460Ah one is taller - as per the photos above and as per the ...
by 4Springs
Sun, 24 Jun 2018, 06:02
Forum: Renewable Energy and Storage (Non-EV)
Topic: Low Cost BMS for Home Storage Batteries
Replies: 9
Views: 921

Low Cost BMS for Home Storage Batteries

Looks like I will be getting some of the ex-AVASS cells (as per the the forum topic here: http://forums.aeva.asn.au/viewtopic.php?f=16&t=5574 ). The "Low Cost BMS" is a project I used in my car, and should be ideal for these - low cost but just fancy enough to do all that is required. As is the tend...
by 4Springs
Sat, 23 Jun 2018, 06:26
Forum: General EV Discussion
Topic: Offer for all members Friday 9am WST
Replies: 13
Views: 1332

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
Sat, 23 Jun 2018, 06:23
Forum: General EV Discussion
Topic: Offer for all members Friday 9am WST
Replies: 13
Views: 1332

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: 1132

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...