I have a friend in Utah a few hours out of Salt Lake that wants to put an
e-wheel on an eGO. So a non-running one is sought cheap.No working motor,
controller etc... Preferably in the West nearer than San Francisco. Shipping
might be a deal killer so the closer to Utah the better. Must have a
I did not know there were 12v eGO scooters. I think mine is all 24vdc. No
DC/DC. I do have more data. I was regening down my hill going slowly. Each
battery was 13.34vdc exactly. almost all the way down the hill the regen cut
out and I couldn't get it going. I pushed along till about a
This 1C test is the standard test that allows inter-comparison of cells
from brand to brand. You need some sort of a test under standard
conditions, for different size cells, for different voltage cells, etc.
You need some test that is uniform for all manufacturers. This is the
test everyone
On 4/16/20 6:32 PM, Michael Ross via EV wrote:
As shown by the research at Dalhousie, 16000 cycles is meaningless if the
conditions are watered down.
That kind of cycle count is falsely impressive, and a huge waste of time
and resources.
Assuming you are not referring to a 1C discharge rate
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The A123 systems 26650 cylindrical cells have a _huge_ cycle life.
Way over 5000 cycles at a 1C rate. 100% SOC discharge. (They have cycled
a 26650 cell more than 16,000 times and still have greater than 50%
capacity.)
The main trouble with higher rates is the elevated cell temperature
The A123 systems 26650 cylindrical cells have a _huge_ cycle life.
Way over 5000 cycles at a 1C rate. 100% SOC discharge. (They have cycled
a 26650 cell more than 16,000 times and still have greater than 50%
capacity.)
The main trouble with higher rates is the elevated cell temperature
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Peri Hartman via EV wrote:
Ok, I did a little bit of research. Anyone care to double check this ?
Looks correct (at a casual glance).
I'll say right now that 100 caps at $40 is a non starter :)
Yes. It's possible, but not cheap. :-)
The cheapest solution is probably an ICE and generator.
Problem: After normal time out the contactor will not re-energize and turn the
bike back on when turning the key to go far or go fast. (no click) It will
start to work intermittently after time.(click) It has never failed while
riding. One other thing, the wiring diagram doesn't show the
5,000j is 5000 watt/seconds or 6.7 HP for 1 second
100 amp-hour battery at 360 volts is 36KW-Hr or 129,000,000 watt-seconds or
joules.
To store 36KWhr at 360 volts, you would need 2,000F of capacitor rated at
>360volts. When 50% discharged, the voltage would be 254volts.
David Kerzel
p://groups.yahoo.com/group/NEDRA)
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You can buy a cheap Chinese battery spot welder on Ebay for less than $100.
It's probably even less than that from Aliexpress, if you trust them. I saw
one being used a few years ago and it seemed OK. I have no idea about its
longevity or relative convenience.
David Roden - Akron, Ohio, USA
a
> better modification of this design. Lawrence Rhodes
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On 04/16/2020 03:36, Lawrence Rhodes via EV wrote:
This is crude and the electrodes stick. However no big battery is needed.
https://youtu.be/WSXHO7C1vaM maybe some one knows a better method. Maybe a
better modification of this design. Lawrence Rhodes
I had to laugh with him safety
Wonder how fast you have to drive to flip a model 3?
Sent from my iPhone
> On Apr 16, 2020, at 4:37 AM, evln via EV wrote:
>
>
>
> https://taiwanenglishnews.com/tesla-catches-fire-after-crash-driver-dies/
> Tesla catches fire after crash: driver dies
> April 3, 2020 A Tesla Model 3 caught
EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
>
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Yes, so in practice I probably could only get about 70-80% of the energy
out, I presume. And then I need to step up the voltage. Complicated.
Peri
-- Original Message --
From: "Jay Summet via EV"
To: ev@lists.evdl.org
Cc: "Jay Summet"
Sent: 16-Apr-20 8:12:16 AM
Subject: Re: [EVDL]
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The other issue with Capacitors is that the voltage goes down quickly,
and to get all the energy out you need to be able to make use of the
widely varying voltage range.
Jay
On 4/16/20 11:00 AM, Peri Hartman via EV wrote:
Ok, I did a little bit of research. Anyone care to double check this ?
Ok, I did a little bit of research. Anyone care to double check this ?
Here's one for $42 at unit quantity. 1200F, max voltage 2.7V
https://www.digikey.com/product-detail/en/tecate-group/TPLH-2R7-1200SL60X74/2085-TPLH-2R7-1200SL60X74-ND/9930298
Energy is
E = 1/2 CV^2
where E is joules.
I'm looking at supercaps. I appreciate that a few people have suggested
this, though I don't know yet whether it could be done economically.
Peri
-- Original Message --
From: "Jan Steinman via EV"
To: ev@lists.evdl.org
Cc: "Jan Steinman"
Sent: 15-Apr-20 11:03:27 PM
Subject: Re: [EVDL]
ttp://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20200416/a73e08d1/attachment.html>
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https://taiwanenglishnews.com/tesla-catches-fire-after-crash-driver-dies/
Tesla catches fire after crash: driver dies
April 3, 2020 A Tesla Model 3 caught fire after hitting a traffic island
and overturning in Taoyuan ... After stabilizing the main fire, the lithium
ion batteries continued to
https://sfbay.craigslist.org/eby/ele/d/hayward-a-battery-cells-33v-2500-mah/7098505376.html
Are these batteries a wise purchase? I am building it for a 40 amp 72v
controller. This would be my first lithium build. I think I could bet by with
one string of 21 but would 2 or three strings be
https://www.bclocalnews.com/news/truck-loses-a-wheel-in-crash-keeps-going-crashes-again-in-nanaimo/
Truck loses a wheel in crash, keeps going, crashes again in Nanaimo
Apr. 8, 2020 ... A witness said the truck had originally been involved in a
crash with an electric car at the intersection with
explore:
https://www.google.com/search?q=eGO+scooter+won't+switch+back+on
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I think the answer is really quite simple — and very expensive: capacitors!
I have a fence charger that charges/discharges six joules every second or so.
I have studio strobe lights that can charge/discharge nearly 5,000 joules in
under ten seconds.
Other than the magnitude of energy that is
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