Search found 627 matches

by 4Springs
Sat, 31 Aug 2019, 05:47
Forum: Renewable Energy and Storage (Non-EV)
Topic: 3 phase supply but no 415v connections
Replies: 20
Views: 1699

Re: 3 phase supply but no 415v connections

brendon_m wrote:
Fri, 30 Aug 2019, 21:48
Scrap that, I have maximum dardiness.
Screenshot at 2019-08-31 07-45-22.png
Screenshot at 2019-08-31 07-45-22.png (23.22 KiB) Viewed 1649 times
by 4Springs
Sat, 17 Aug 2019, 06:12
Forum: General EV Discussion
Topic: Regenerative braking effect compared to traditional braking?
Replies: 6
Views: 972

Re: Regenerative braking effect compared to traditional braking?

This is interesting. I assume that regen cannot lock the wheels. This is because the retarding force is only applied when the motor is moving, and it gets less the slower the motor goes. If the wheels locked up then the motor would be stationary, and the regen wouldn't work. A sort of natural ABS. I...
by 4Springs
Tue, 13 Aug 2019, 18:38
Forum: Members Machines
Topic: 4Springs' Brumby
Replies: 297
Views: 52354

Re: 4Springs' Brumby

For the back box could you rotate the cells so they are flat on the 310mm? That would fit the 137mm perfectly. Then either put more cells in the back box and less at the front or make the back box smaller. I would also keep the cells all together. The gap in the middle will make it really messy to ...
by 4Springs
Mon, 12 Aug 2019, 19:16
Forum: Members Machines
Topic: 4Springs' Brumby
Replies: 297
Views: 52354

Re: 4Springs' Brumby

How am I going to connect these cells together? Francisco has posted a picture of how he has done it: Francisco_Al.png His cells are three in parallel. What you can see here is three cells connected to the left side of an aluminium block, then the next three cells connected to the right side of the ...
by 4Springs
Mon, 12 Aug 2019, 18:41
Forum: Members Machines
Topic: 4Springs' Brumby
Replies: 297
Views: 52354

Re: 4Springs' Brumby

The front two boxes are identical, and they will need to be re-made. They will be a bit longer in length and a bit shorter in height. Making new boxes means that the swap-over can be relatively quick, so the car will be off the road for a minimum of time. Front_Box.png These front boxes will be rela...
by 4Springs
Mon, 12 Aug 2019, 18:23
Forum: Members Machines
Topic: 4Springs' Brumby
Replies: 297
Views: 52354

Re: 4Springs' Brumby

The Brumby is still going well, but I'm thinking it might be time for a battery upgrade. The target range for this lithium (LFP)pack was 80km. My very first test took me just over 100km, in summer, fairly slow stop/start driving. That made the 80km target achievable under most conditions. The batter...
by 4Springs
Sat, 10 Aug 2019, 18:47
Forum: Technical and conversion discussion
Topic: Starting to research vintage Mazda conversion. Help appreciated.
Replies: 21
Views: 2028

Re: Starting to research vintage Mazda conversion. Help appreciated.

As for motors, the links above have been useful, but is AC not a better system because it is easier to get regen happening, Of course along with a premium price? If you want regen you want AC. Do you want regen though? Depends on your roads and driving style. If you have lots of hills then you want...
by 4Springs
Fri, 09 Aug 2019, 18:41
Forum: Scooters, mopeds and electric toys
Topic: Are hybrid bikes worth the money?
Replies: 7
Views: 1238

Re: Are hybrid bikes worth the money?

I've used a hybrid bike for about 10 years. Almost all on the paved road. The paved road here can be a bit gravelly some times, so the slightly wider tyres are useful. I blew out two tyres in the first month, then none for about 7 years, then two in about a year. I'm assuming that a pure road bike w...
by 4Springs
Mon, 05 Aug 2019, 15:43
Forum: Technical and conversion discussion
Topic: Prelude conversion project - some questions
Replies: 604
Views: 59615

Re: Prelude conversion project - some questions

Ah, you're taking me back to that summer when I moved the charger from under the bonnet to under the tray where the fuel tank used to be. It's really nice to work on under there, lie on the ground and it's all laid out in front of me. I had enough room to add a second charger I had lying around, and...
by 4Springs
Sat, 27 Jul 2019, 07:42
Forum: Batteries, charging, management and monitoring
Topic: E63 LG 63Ah NCM battery group buy
Replies: 35
Views: 5056

Re: E63 LG 63Ah NCM battery group buy

Ah, now I see. The boards are basically soldered onto the nuts, then there is another piece of flat aluminium to take the pressure against the clamp. A very neat way to do it. They are round nuts though, so you can't put a spanner on them to tighten against. You're tightening the bolt against your s...
by 4Springs
Thu, 25 Jul 2019, 16:10
Forum: Batteries, charging, management and monitoring
Topic: E63 LG 63Ah NCM battery group buy
Replies: 35
Views: 5056

Re: E63 LG 63Ah NCM battery group buy

So I've just measured up my battery boxes, and they look like they would suit these cells. 5p 40s would theoretically fit, and would give me 47kWh with a 20kg weight increase over my current 20kWh pack. 4p 41s would fit with a lot more room to spare, and would give me 38kWh with a 20kg weight decrea...
by 4Springs
Wed, 24 Jul 2019, 19:31
Forum: Batteries, charging, management and monitoring
Topic: E63 LG 63Ah NCM battery group buy
Replies: 35
Views: 5056

Re: E63 LG 63Ah NCM battery group buy

Assembling the pack with the water cooling system and pouch clamping hardware is a little difficult. You need a special jig to hold everything in place while you assemble it. How necessary would the water cooling be? I'd assume that the NCM cells would be at least as good as LFP for internal resist...
by 4Springs
Wed, 24 Jul 2019, 16:28
Forum: Batteries, charging, management and monitoring
Topic: E63 LG 63Ah NCM battery group buy
Replies: 35
Views: 5056

Re: E63 LG 63Ah NCM battery group buy

It looks like you have three cells in parallel in each clamp? Or could you fit more? I'm thinking of 4 or 5 in parallel. What are the overall dimensions including the clamping hardware? I have one long battery box (in the back) and two short ones (in the front, for weight distribution). I think the ...
by 4Springs
Sun, 21 Jul 2019, 16:24
Forum: Renewable Energy and Storage (Non-EV)
Topic: Low Cost BMS for Home Storage Batteries
Replies: 61
Views: 9120

Re: Low Cost BMS for Home Storage Batteries

Are you intending to use CANbus comms with your SP Pro or set it up standalone with a customized version of the generic LiFePO4 settings? The intention at this stage is to use a 48V SP Pro, and let it think that it is a lead-acid battery. I won't be using CANbus, but will be adjusting settings to i...
by 4Springs
Sun, 21 Jul 2019, 16:10
Forum: Renewable Energy and Storage (Non-EV)
Topic: Low Cost BMS for Home Storage Batteries
Replies: 61
Views: 9120

Re: Low Cost BMS for Home Storage Batteries

Is the oven for reflow? Indeed it is. Was also used for fruit buns at one stage. It has a thermostat, we set it to about 200 degrees Celcius. Watch the circuit boards through the glass window to see when the solder melts - then leave it for 30 seconds more to make sure. The whole process takes abou...
by 4Springs
Sun, 21 Jul 2019, 08:11
Forum: Renewable Energy and Storage (Non-EV)
Topic: Low Cost BMS for Home Storage Batteries
Replies: 61
Views: 9120

Re: Low Cost BMS for Home Storage Batteries

Software - what are we going to do with these things?? The current software is available here: https://sourceforge.net/projects/low-cost-bms/files/Programming/ The current Cell Module software is version 1.10. I don't expect that this will change. The latest Master software is H1.00. I've forked to ...
by 4Springs
Sun, 21 Jul 2019, 06:33
Forum: Renewable Energy and Storage (Non-EV)
Topic: Low Cost BMS for Home Storage Batteries
Replies: 61
Views: 9120

Re: Low Cost BMS for Home Storage Batteries

Well, after a few working bees over the last several weekends, all the boards in the group buy are now accounted for. Some were sent to folks (mostly interstate) for them to assemble themselves. We had to remove a resistor from each cell module board (placed there by mistake when I specified the wro...
by 4Springs
Mon, 10 Jun 2019, 19:35
Forum: Hyundai
Topic: Hyundai Sales Tactics
Replies: 38
Views: 3820

Re: Hyundai Sales Tactics

Theres not really any aim or direction to this conversation beyond conversation. I like that - very quotable. My 2c worth about Hyundai sales people. We have been working with the single Blue Drive Hyundai dealer in our state. They don't know a heap about their cars, but can you blame them? They re...
by 4Springs
Mon, 10 Jun 2019, 05:36
Forum: Hyundai
Topic: Hyundai Sales Tactics
Replies: 38
Views: 3820

Re: Hyundai Sales Tactics

If you want a froot or frunk or whatever that thing is in the front get a Tesla. It's definitely a froot. Glad to hear someone else using the term! There is so much space under the bonnet of a Kona, I wonder how long it will be before you can buy a bolt-in insert. Remove the dinky plastic cover thi...
by 4Springs
Wed, 05 Jun 2019, 16:30
Forum: Charging Infrastructure
Topic: Dual Charging
Replies: 5
Views: 827

Re: Dual Charging

Is that a cost limitation or a practical limitation? The DC fast charging requires interfacing with the fast charger computer. So it's a combination of having the right voltage as jonescg says, and working out the software. You'd need to have a good idea what your battery is doing so you can give t...
by 4Springs
Wed, 05 Jun 2019, 16:15
Forum: General EV Discussion
Topic: Bring on the BERM please
Replies: 30
Views: 4499

Re: Bring on the BERM please

I see, thanks. The tight turning circle may negate the need for the reverse mowing I do now. I reverse mow in part because my mower does not have a good turning circle, and partly because it can go instantaneously from forwards to reverse, so it's very easy to do. I may be able to do it in circles i...
by 4Springs
Mon, 03 Jun 2019, 19:15
Forum: Renewable Energy and Storage (Non-EV)
Topic: BMS for AVASS cells, 16S LiFePO4
Replies: 10
Views: 1268

Re: BMS for AVASS cells, 16S LiFePO4

the ZEVA system is looking quite attractive. I came here to suggest the Zeva unit, but I see that you've found it! Services 12 cells per board, so you'd need two if you have 16 cells. This is a spaghetti BMS (wires go from one board to many cells), as opposed to a daisy-chain BMS (wires go from the...
by 4Springs
Mon, 03 Jun 2019, 18:47
Forum: Charging Infrastructure
Topic: Dual Charging
Replies: 5
Views: 827

Re: Dual Charging

I haven't seen a DIY vehicle with DC fast charging.
No reason why you couldn't use two AC charging sockets at once. Need a few onboard chargers, but if money is no object...
by 4Springs
Sat, 01 Jun 2019, 18:54
Forum: General EV Discussion
Topic: Bring on the BERM please
Replies: 30
Views: 4499

Re: Bring on the BERM please

I'd love a catcher, but that one looks quite convoluted and likely to clog up. Also difficult to empty - you have to get off the mower! I'd been assuming that I'd get one of these mowers (sans catcher) before spring. But the reversing problem looks like it might change my mind. How exactly does it w...
by 4Springs
Sat, 25 May 2019, 06:21
Forum: Renewable Energy and Storage (Non-EV)
Topic: Low Cost BMS for Home Storage Batteries
Replies: 61
Views: 9120

Re: Low Cost BMS for Home Storage Batteries

Have you got any spares in those 400 boards? Yes. Final totals were 352 cell module and 37 master boards ordered by people in the group buy. There are set order quantities at the board manufacturing place, so I ordered 400 module and 40 master boards. I've updated the Airtable form: https://airtabl...