Search found 86 matches

by unheardofinstruments
Wed, 04 Nov 2015, 14:12
Forum: Batteries, charging, management and monitoring
Topic: Lithium Sulfur Batteries
Replies: 57
Views: 11456

Lithium Sulfur Batteries

http://www.steatite-batteries.co.uk/oxis-energy.html

are the people that have created the ip that sion are using to make lithium sulphur batteries and they seem optimistic as...

[Edited by Admin to make url "clickable"]
by unheardofinstruments
Wed, 04 Nov 2015, 14:00
Forum: Batteries, charging, management and monitoring
Topic: Lithium Titanate (LTO) Batteries
Replies: 5
Views: 2442

Lithium Titanate (LTO) Batteries

I have only seen these used by lightning car company http://www.lightningcarcompany.co.uk/Lightning/home.html Lithium sulphur batteries look promising too http://www.steatite-batteries.co.uk/oxis-energy.html Lithium Sulphur Topic here [Edited by Admin to make the links "clickable" and add link to Li...
by unheardofinstruments
Wed, 15 Apr 2015, 19:00
Forum: Electric motors and controllers
Topic: adaptive magnetic flux array motor
Replies: 26
Views: 6692

adaptive magnetic flux array motor

perhaps I should have said power instead of torque then, nevertheless the idea is that fewer of the 32 coils firing at full power is more efficient than more firing at lesser power? I thought that was the idea in the new arrangement that was a new way of saving energy. Sort of like skipping controll...
by unheardofinstruments
Wed, 15 Apr 2015, 18:01
Forum: Electric motors and controllers
Topic: adaptive magnetic flux array motor
Replies: 26
Views: 6692

adaptive magnetic flux array motor

The savings on part load are from being able to use a smaller number of the available coils at full power rather than running them all at fractional power thus improving efficiency at lower torque levels
by unheardofinstruments
Tue, 20 Jan 2015, 18:57
Forum: Parts & Suppliers
Topic: Leaf cells
Replies: 40
Views: 8482

Leaf cells

They look like an easy shoe in package, more details on chemistry etc. would be nice, seems a good deal anyone enquired further yet? Another group buy could reduce freight charges considerably for those in need of a traction pack, I have a project on the cards for a friend who wants to convert an au...
by unheardofinstruments
Fri, 16 Jan 2015, 16:47
Forum: Parts & Suppliers
Topic: Leaf cells
Replies: 40
Views: 8482

Leaf cells

They have arrived and Batrium have made a special board for the BMS to match. Handy that the cases came with them, looking forward to finishing the suzuki carry (bongo van) now.
by unheardofinstruments
Thu, 27 Nov 2014, 00:08
Forum: Members Machines
Topic: Suzuki Van
Replies: 23
Views: 5975

Suzuki Van

shame you didn't get the motor with the shaft sticking out the other end hydraulic regen is twice as efficient as electric and very simple using a gear pump/motor and electric/magnetic AC clutch and a reservoir/accumulator and tubing. perhaps a belt could run off the coupler and go through gaps in t...
by unheardofinstruments
Wed, 26 Nov 2014, 17:31
Forum: General EV Discussion
Topic: interesting developments thread
Replies: 0
Views: 298

interesting developments thread

I thought somewhere we could post news on research developments and cool newfangled gizmos might be a good thread to have going. I found a couple of hub motors being made; http://www.proteanelectric.com/en/video-gallery/in-wheel-motor-video-series/?img=1229&gal=1228 http://peterharris.org.uk/roadsaf...
by unheardofinstruments
Wed, 26 Nov 2014, 17:05
Forum: Batteries, charging, management and monitoring
Topic: Solar car cover
Replies: 79
Views: 7153

Solar car cover

the cheap inverters from china on ebay have a very high idle current. Solar paint isn't as efficient as the monocrystalline semi-flexible solar panels we have now but as far as covering the bits left over on the tight contours it would help. anyone got a gas powered micro turbine aircraft alternator...
by unheardofinstruments
Fri, 03 Oct 2014, 20:28
Forum: The Lounge
Topic: New Solar Panel Setup Suggestions
Replies: 8
Views: 961

New Solar Panel Setup Suggestions

I have just moved house and am now off grid, the stand alone solar setup is inadequate to charge my almost 25kWh pack so I am looking at using syngas from a biochar retort to run a 1942 petter generator at night and a green steam engine (under construction) with a fresnel lens from a rearlight tv in...
by unheardofinstruments
Fri, 03 Oct 2014, 19:48
Forum: Batteries, charging, management and monitoring
Topic: Australian made batteries for EV
Replies: 51
Views: 5845

Australian made batteries for EV

I agree on the ugly comment but a lot of people love it and it sure turns heads (might be the exhaust leak though) It is a bit scary over 90kmph being an early 60s setup and it is very light. I had to change the fat rims on front due to extreme under-steer on the dirt and that helped. Needs lots of ...
by unheardofinstruments
Thu, 02 Oct 2014, 03:58
Forum: Batteries, charging, management and monitoring
Topic: Australian made batteries for EV
Replies: 51
Views: 5845

Australian made batteries for EV

I have this, a `poraga' early beetle kit car, I was trying to sell it with the I.C.E. for 2500 but nobody wanted it so I may convert it too in time.

Image
by unheardofinstruments
Thu, 25 Sep 2014, 22:07
Forum: Batteries, charging, management and monitoring
Topic: Australian made batteries for EV
Replies: 51
Views: 5845

Australian made batteries for EV

I like the concept of the Atom but it is a bit ugly, no roof is kind of limiting too. I wonder what would a naked atom be, without the exhaust and motor and radiator....just the spaceframe and interior and bodypanels maybe? the axiom guys quoted me 28000 for an unpowered shell if I sourced my own (p...
by unheardofinstruments
Thu, 25 Sep 2014, 21:46
Forum: Batteries, charging, management and monitoring
Topic: Australian made batteries for EV
Replies: 51
Views: 5845

Australian made batteries for EV

various reasons for failure in my pouch cells, mechanically, the tubular ones seem to have done much better there and the bms was implicated once so I guess that is not the battery pouches fault but the construction, never had a cylindrical cell swell. Main concern, never got anywhere near the theor...
by unheardofinstruments
Thu, 25 Sep 2014, 06:02
Forum: Batteries, charging, management and monitoring
Topic: Australian made batteries for EV
Replies: 51
Views: 5845

Australian made batteries for EV

I would settle for a Velorex or check out these photos for options
http://www.forgottenfiberglass.com/fibe ... iberglass/
by unheardofinstruments
Thu, 25 Sep 2014, 05:47
Forum: Batteries, charging, management and monitoring
Topic: Australian made batteries for EV
Replies: 51
Views: 5845

Australian made batteries for EV

btw I have a beetle floorpan and a 2E fiberglass kit on the back-burner, it was very cheap and I agree the light weight, manual steering, availability of parts, simplicity, tractability of this highly desirable and customisable proven platform is pretty ideal. Adaptor plates exist for most common el...
by unheardofinstruments
Thu, 25 Sep 2014, 05:00
Forum: Batteries, charging, management and monitoring
Topic: Australian made batteries for EV
Replies: 51
Views: 5845

Australian made batteries for EV

I spoke with Armin, not sure who in the organisation he was but he was very helpful when I bought a BMS module to retrofit to some of their batteries I got from a secondhand e-bike. He had made a very powerful electric racing boat using several high powered pmdc motors and seemed well versed in the ...
by unheardofinstruments
Sat, 14 Dec 2013, 21:56
Forum: Parts & Suppliers
Topic: Leaf cells
Replies: 40
Views: 8482

Leaf cells

no reply as to how much fits on a pallet, I was told by someone it needs to be on surface freight as they aparrently are dangerous goods but they said they had already shipped by air to Oz, no cell tech details yet. Someone else posted them here too http://forums.aeva.asn.au/viewtopic.php?title=ebay...
by unheardofinstruments
Thu, 12 Dec 2013, 00:17
Forum: Parts & Suppliers
Topic: Leaf cells
Replies: 40
Views: 8482

Leaf cells

I was thinking of getting some leaf cells, new from salvaged Nissan Leafs. 2S-2P 7.2V 55Ah each at $85 plus freight, a pallet load would make freight about 800 to brisbane. I don't need a whole pallet. Room for anyone else to jump a ride for their pack. They can come as blocks of 8 ready to mount up...
by unheardofinstruments
Thu, 21 Nov 2013, 01:08
Forum: General EV Discussion
Topic: Raising the subject of range extending trailers
Replies: 67
Views: 8355

Raising the subject of range extending trailers

I had no idea a ups could be so little, seems a good way to regulate charge, I figured a rectified pmg such as from a wind turbine is very light for the output, coupled with a small motor with peltier generator units on the exhaust to charge the car up dc directly and for regeneration have it driven...
by unheardofinstruments
Tue, 22 Oct 2013, 03:17
Forum: Nissan Leaf
Topic: Portable generator
Replies: 73
Views: 12676

Portable generator

I have to wonder why use an a standard generator when a much lighter and more efficient package could be made using a wind turbine permanent magnet generator and a small motor. I was also interested in how the dc output voltage is regulated for charging, seems wasteful to me to step up to 240 just t...
by unheardofinstruments
Thu, 17 Oct 2013, 16:23
Forum: Members Machines
Topic: BajaBoard 12kW electric board
Replies: 26
Views: 4831

BajaBoard 12kW electric board

Very cool reduction gear stuff is available for a pmdc outrunner such as the lrk torquemaster open source design made with rewound cd drive stators up to 2.7kw which have been used on bicycles etc and is a very high power to weight ratio system and easy enough to build/wind how you want it to perfor...
by unheardofinstruments
Thu, 26 Sep 2013, 04:26
Forum: General EV Discussion
Topic: Best batteries at the moment?
Replies: 5
Views: 1531

Best batteries at the moment?

the kolibri batteries are polymer, low temperature and are a new production method, there is a link to the inventor and his thesis somewhere, he got a grant to start it up after coming up with the method of production, they have higher energy density and lifespan. They had an audi quattro EV that th...
by unheardofinstruments
Wed, 25 Sep 2013, 14:21
Forum: General EV Discussion
Topic: Best batteries at the moment?
Replies: 5
Views: 1531

Best batteries at the moment?

10,000 discharge cycles, looking hopeful for long life batteries.

http://www.zsw-bw.de/uploads/media/pi06 ... ien_EN.pdf

the lightning car company uses lithium titinate batteries which claim similar lifespan too
by unheardofinstruments
Tue, 17 Sep 2013, 15:48
Forum: Members Machines
Topic: Weber and Coulomb's MX-5
Replies: 1698
Views: 330647

Weber and Coulomb's MX-5

ooh er... that does look awfully close to complete guys, well done, ?how was it to drive? I have been in some awkward positions making battery boxes and during under dash contortions (unfortunately the electrics in my donor looks like an insane white tailed rat installed the stereo) ...and I never w...