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drleviathan replied to the thread Another Li-ion battery article.
" An update on this:

Back in late February John Goodenough announced just such a breakthrough in battery technology. The new tech can use Lithium or Sodium and hold at least 3X the density of current Lithium batteries. They were very robust during fast charge and repeated charging because they use a glass (not liquid) electrolyte and cannot form power-sucking dendtrites as the alkali metal moves from anode to cathode. A good article from March 17 is here:

https://www.forbes.com/sites/jamesco...etting-better/

And here is an update in an online Q&A from April 19:

https://hardware.slashdot.org/story/...n-b-goodenough

There are some details in there that might interest readers on ElMoto. I will summarize some of them:

  • Lower temperature operation: -20C (-4F)
  • Less heat generation during charg and discharge
  • Faster to charge
  • More recharge cycles with less degredation (maybe almost zero)
  • Cheaper to manufacture
  • Easier to recycle
  • Goodenough estimates three years for a large battery manufacturer to have a working factory
"

2 Hours Ago

mcress replied to the thread Hello From UK.....
" Thanks! It's a good feeling knowing it's now legal - the rest is just tinkering and making it better!
The bearings - looks like it was just a duff one - I took the bearing completely apart after removal, to see what state it was in - firstly there was no grease in it at all, the inner and outer races showed no signs of any damage and likewise under a magnifying glass it was hard to see any damage to the balls, but, rolling them on a flat sheet of glass did reveal that they had flats on them, which is where I was getting the notchiness. The other side bearing was actually filled with grease and was not notchy at all but had some lateral play so was replaced also. The bearings are 61912 ZZ measuring 85mm Outer 60mm Inner and 13mm width.
I only got it finished last night so have only run it on the paddock stand, should get time this weekend to run a couple of full charges through it and get some real world stats.
Cheers,
Mike. "

2 Days Ago

Richard230 clicked Likes for this post: Hello From UK.... by mcress

2 Days Ago

Richard230 clicked Likes for this post: Hello From UK.... by mcress

2 Days Ago

marcexec replied to the thread Hello From UK.....
" Congrats on your MOT!
Any idea how the bearings got damaged & what the sizes are?
Video please "

2 Days Ago

mcress replied to the thread Hello From UK.....
" Now with added on board charger.....
Attachment 7350 "

2 Days Ago

mcress replied to the thread Hello From UK.....
" Bearings replaced, back on the road. Attached a couple of pics of the inside of the hub motor if anyones interested.
Cheers,
Mike.Attachment 7348Attachment 7349 "

2 Days Ago

Bernel clicked Likes for this post: Zvexx P1 at the Monaco Supercar show by Hugues

5 Days Ago

Hugues replied to the thread AC-23 Motor not spinning with Curtis 1238 controller.
"
Quote Originally Posted by milton View Post
I am keeping that ratio as an option. My pulley is from Gates and they have quite some options for drive side pulley. If needed I can replace the drive side with a smaller one.
You'll probably need to ventilate your motor very well. I'm running 7.04:1 and I had to do the following:
- add 12v radial blower to force air into the openings on the shaft side to ventilate rotor
- add 12v fan underneath the motor to ventilate stator
- remove the bell shape cover to help the mechanical fan to suck air out of rotor

The controller also sits on heatsink which are ventilated by two 12v blowers which exhaust is blowing on top of motor.

Which belt have you used ? The Gates Carbon GT ? It has blue teeth, that's the only one which can handle this power in that width and pitch 8 (I presume). "

6 Days Ago

milton replied to the thread AC-23 Motor not spinning with Curtis 1238 controller.
"
Quote Originally Posted by Stevo View Post
Cool. What color ya gonna paint it? Mural?
Thinking of either keeping it bare metal finish it a bit and just clear coat it or go with matte black and bronze. But there is a long time to for that... "

6 Days Ago

milton replied to the thread AC-23 Motor not spinning with Curtis 1238 controller.
"
Quote Originally Posted by Ken Will View Post
I like it!
It reminds me a little of Graucho's bike.
Attachment 7346
Thanks ken. "

6 Days Ago

milton replied to the thread AC-23 Motor not spinning with Curtis 1238 controller.
"
Quote Originally Posted by Nando View Post
Milton, that is a very impressive build. Looks like you built the frame and the front suspension, wow. Building the whole bike from scratch, hope it goes smooth.
Yes Nando. I built every thing from scratch including the front suspension and rear swing arm. Also trying to figure out the design for the handle bar since the entire bike is curve, would concentrate on some big bends rather then small bends.

Right now there is one hurdle. The rear pulley is a tad wobbly. One of the bolt hole is not centered. Will have to figure out a way to do that. "

6 Days Ago

milton replied to the thread AC-23 Motor not spinning with Curtis 1238 controller.
"
Quote Originally Posted by Hugues View Post
Pretty cool build !
we have pretty much the same gear,
can't you reach a ratio of 7:1 with this rear sprocket ? i have 7.04 with 176 tooth on wheel and 25 on motor

watch out when you connect your BMS, you can also damage the electronic of the BMS if you invert your wires. First you need to connect all your wires to your battery, then you check manually with a voltmeter that you got them in the right order on the BMS connector, then you can plugin the connector in the BMS. They also sell a tool to check this, but it can be done manually.
I am keeping that ratio as an option. My pulley is from Gates and they have quite some options for drive side pulley. If needed I can replace the drive side with a smaller one. "

6 Days Ago

milton replied to the thread AC-23 Motor not spinning with Curtis 1238 controller.
"
Quote Originally Posted by podolefsky View Post
By the way, bike is looking awesome!
Thanks podolefsky "

6 Days Ago

Richard230 created the thread VW to spend billions on charging stations in US.
" According to an article in my newspaper today, written by Louis Hansen of the Bay Area News Group, VW has proposed an $800 million settlement with the state of California to atone for their diesel-engine emission-cheating scandal. As part of the settlement, VW plans to spend billions in the U.S. to build charging stations and to promote electric vehicle use across the country.

In California, VW agreed to spend $1.2 billion through two separate programs: $381 million for pollution mitigation and $800 million in an infrastructure trust fund. There is currently (not surprisingly) an argument over how those funds will be spent between environmentalists, lawmakers and EV charging companies. Opponents of building charging stations along freeways and well traveled highways claim that the deal could dampen competition in the charging station market and ignores poor communities most affected by air pollution.

VW proposes to allocate the funds in $200 million, 30-month phases over the next 10 years. The first phase would spend about $120 million to build charging stations, $45 million for community facilities and $75 million for a high-speed highway network throughout the state. The state wants to see 1.5 million electric vehicles on the road by 2025. (Each paying an additional $100 per year surcharge over ICE vehicle yearly licensing fees, of course. )

Interestingly, ChargePoint is opposed to the proposal as they feel that the VW charging station plan would "drown out all other participants in the ZEV infrastructure market through enormous spending." ChargePoint wants the state to earmark at least 35% of the investment, above the current 25% goal, to disadvantaged communities. ChargePoint says that VW plans to build mostly "high speed charging stations at highway exits rather than community charging stations and workplaces, multifamily housing, and retail stores." (I would argue that those locations are not likely to generate very much usage and therefore would not be very profitable, compared with VW's plans.) Various state legislators and members of Congress, as well as the Central California Environmental Justice Network say that many poor, rural communities have no charging stations, discouraging residents from buying green cars. "

6 Days Ago

ElMotoMike clicked Likes for this post: Zvexx P1 at the Monaco Supercar show by Hugues

6 Days Ago

Richard230 clicked Likes for this post: Zvexx P1 at the Monaco Supercar show by Hugues

6 Days Ago

Hugues created the thread Zvexx P1 at the Monaco Supercar show.
" ok boys, a little self promotion here,

i'll be showing off my bike at the Monaco Supercar show this week from April 20th to 23rd 2017 in....well...Monaco:
http://www.topmarquesmonaco.com/en/t...ors.html,01506

So if you're in the region, please pass by on stand C2, I'll be glad to meet you.

Attachment 7347 "

6 Days Ago

Stevo replied to the thread AC-23 Motor not spinning with Curtis 1238 controller.
" Cool. What color ya gonna paint it? Mural? "

1 Week Ago

Ken Will replied to the thread AC-23 Motor not spinning with Curtis 1238 controller.
" I like it!
It reminds me a little of Graucho's bike.
Attachment 7346 "

1 Week Ago