Re: [EVDL] 24 cell BMS

[Lee Hart via EV]

Cor van de Water via EV wrote:

There may be reasons to have a large balancing current, but they escape
me.


1. To deal with cheap old mismatched cells.

2. To allow you to replace one cell without replacing the whole pack.
   The new cell is likely to be significantly different than the rest.

3. To stop a cheap, stupid, or non-networked charger that hasn't cut
   back its current from overcharging cells.

4. So it can balance faster, as when commissioning a new pack with
   cells that arrive at different states of charge.

5. To be able to balance *while driving*. If you top-balance and the
   cells have different amphour capacities, they will go dead at
   different times. If the BMS can transfer charge from stronger
   cells to weaker ones, then you can increase the effective capacity
   of the pack, and thus your range.

That said... I don't think this particular BMS can do any of these 
things. It does not appear to have any way to deal with the heat 
produced by many cells bypassing at 1.5 amps, nor to be able to transfer 
charge between cells rather than just burning it up as heat.


--
A designer knows he has achieved perfection not when there is
nothing left to add, but when there is nothing left to take away.
-- Antoine de Saint Exupery
--
Lee Hart, 814 8th Ave N, Sartell MN 56377, www.sunrise-ev.com/balancer.htm
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Re: [EVDL] Fwd: EVLN: GM's 1st 200mi EV will launch as a driverless (autonomous) Lyft platform

[Paul Dove via EV]

LOL!

See its started already

Sent from my iPad

> On Jul 27, 2016, at 11:40 PM, Chris Meier via EV  wrote:
> 
> Stop blaming Tesla, the vendors equipment doesn't look that high. US trucks 
> should have guards,  put your energy there, please. 
> -Chris
> -- 
> -Chris
> 
>> On July 27, 2016 2:05:05 PM CDT, Collin Kidder via EV  
>> wrote:
>> I agree, people can be dangerous. If we could figure out the software
>> I think self driving cars could be really safe. And, they'd be faster
>> too because the road could be run with very little gap between cars so
>> long as all of the cars are communicating and the cars are self
>> driving. But, being a software developer, the failures terrify me. I'm
>> too familiar with the way software is written and how buggy it tends
>> to be to be all that comfortable in a 70MPH 3500lb missile. However,
>> I'm already doing that in a drive by wire car. So, I guess it's just a
>> matter of perception. But, manufacturers are going to have a lot of
>> those perception issues to deal with. I think insurance will be kind
>> of tough at first too. If a crash happens who do you blame? What if
>> both cars were self driving? Will the automakers have to fight each
>> other in court? What if the self driving car mistook your semi for the
>> open sky (as just happened in the Tesla fatality)? I'm kind of leery
>> of the millions of ways a computer could mistake the video coming in.
>> Humans have a very finely tuned visual system and we still get it
>> wrong sometimes. But, I don't think nearly anyone would have been
>> fooled by the semi truck looks like the sky issue. I could see that it
>> was a semi truck if I were driving. Apparently cars can't always.
>> Though, I'm sure it'll improve. It's sort of a chicken and egg
>> situation. I won't trust a self driving car with my own life until it
>> is bulletproof but getting it there requires a lot of on the road
>> testing.
>> 
>>> 
>>> I think that once the self driving cars can demonstrate they can
>> avoid more accidents on the road than the typical human, adoption will
>> be rapid.  Mostly what they would be avoiding would be humans that
>> weren't paying attention.  Once more humans are removed, the overall
>> safety will increase again.
>>> 
>>> We would like to think that all drivers are very careful and fully
>> engaged in driving, but what I see on a daily basis isn't that.  I
>> think that cars that are more predictable and can dodge humans are a
>> good thing.
>>> 
>>> Mike
>>> 
>>> 
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> 
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> 

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[EVDL] EVLN: EV-newswire posts for 20160728

[brucedp5 via EV]

http://electric-vehicle-discussion-list.413529.n4.nabble.com/EVLN-Shanghai-cn-Disney-Resort-offering-SAIC-rental-EVs-gt-30yuan-4-48-hr-td4683101.html
EVLN: Shanghai.cn Disney Resort offering SAIC rental EVs> 30yuan($4.48)/hr
Disney in Shanghai will now offer hourly electric vehicle rentals, ...
Currently, SAIC operates a carsharing service with 100 electric cars and 100
electric ...

http://electric-vehicle-discussion-list.413529.n4.nabble.com/EVLN-Czech-Cezeta-Pig-Reborn-as-an-e-Scooter-v-td4683103.html
EVLN: Czech Cezeta ‘Pig’ Reborn as an e-Scooter (v)
Cold War-Era Czech 'Pig' Scooter Cezeta Reborn
A uniquely styled scooter manufactured in then-Czechoslovakia during the
height of the Cold ...

http://electric-vehicle-discussion-list.413529.n4.nabble.com/EVLN-Ford-bails-on-India-s-Electrification-efforts-gt-Ford-seeks-profits-over-reducing-pollution-td4683104.html
EVLN: Ford bails on India's Electrification efforts> Ford seeks profits over
reducing pollution
Ford India exits electric vehicle consortium
With Ford India's exit, only three firms are left in the electric vehicles
consortium, namely Maruti Suzuki, Mahindra and Mahindra, and Tata ...

http://electric-vehicle-discussion-list.413529.n4.nabble.com/EVLN-Used-BMW-i3-review-A-plug-for-second-hand-EV-td4683105.html
EVLN: Used BMW i3 review: A plug for second-hand EV
And that got me thinking: How much does such a great electric vehicle cost
on the used car market? Well, now that the German marque's i3 has been with
us for ...

+
http://electric-vehicle-discussion-list.413529.n4.nabble.com/EVjobs-VW-hiring-production-workers-for-200mi-e-SUV-Chattanooga-TN-plant-td4683106.html
EVjobs: VW hiring production workers for 200mi e-SUV @Chattanooga-TN plant
VW looks to fill Chattanooga plant with new production, workers
VW is readying for assembly of a new midsize sport utility vehicle late this
year, and a top official said this week the company is weighing production
of electric ...




http://evdl.org/evln/
For all EVLN EV-newswire posts


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[EVDL] EVLN: Czech Cezeta ‘Pig’ Reborn as an Electric-Scooter (v)

[brucedp5 via EV]

[ref
http://electric-vehicle-discussion-list.413529.n4.nabble.com/EVLN-Czech-Cezeta-Pig-Reborn-as-an-e-Scooter-v-td4683103.html
]

https://rideapart.com/articles/cold-war-era-czech-pig-scooter-cezeta-reborn
Cold War-Era Czech ‘Pig’ Scooter Cezeta Reborn
July 20, 2016  Chris Cope

[images  
https://cdn.rideapart.com/wp-content/uploads/2016%2F07%2Fcz.jpg

https://cdn.rideapart.com/wp-content/uploads/2016/07/cz1-770x769.jpg
Cezeta 506


video
https://youtu.be/dnlAsijIYLo
]

Cold War-Era Czech ‘Pig’ Scooter Cezeta Reborn

A uniquely styled scooter manufactured in then-Czechoslovakia during the
height of the Cold War has been reborn in electric form.

Cezeta scooters were only manufactured from 1957 to 1964 but gained a small
cult following thanks in part to their distinct look, which came as a result
of placing the gas tank at the front of the vehicle, over the front tire.

Many fans referred to them as “pigs” because of their looks, whereas others
joked that the location of the tank turned the scooter into a kind of
land-based torpedo.

The original Cezeta was driven by a 175cc two-stroke single [ice], but the
newly resurrected Cezeta 506 will get its go from a three-phase brushless
electric motor. The revival comes at the hands of Briton Neil Eamonn Smith,
who first spotted a Cezeta while attending a wedding in the Czech Republic.

“I was instantly in love,” said Smith. “It was a fantastic thing and I
bought one.”

Which led to buying more and more, and more. After a number of restorations,
Smith adopted the technique of replacing the scooters’ old engines with
electric motors – an idea that ultimately led to his desire to resurrect the
brand.

Smith says the new Cezeta 506 will have a range of roughly 150 kilometers
(93 miles) and will be capable of hitting a top speed of 110 km/h (68.3
mph). He says his company plans to manufacture 1,000 scooters this year.
[© RideApart  rideapart.com]



http://www.carscoops.com/2016/07/cezeta-506-is-retro-electric-scooter.html
Čezeta 506 Is The Retro Electric Scooter You Didn't Know You Wanted
7/24/2016  BOGDAN ZOLTAN

Back in the late 1950s a Czechoslovakian motor scooter manufacturer called
Čezeta, gave Piaggio’s Vespa a run for its money. Now it is back in electric
form. 

Čezeta’s 501, 502 and 505 scooters were built from 1957 to 1964, and albeit
the company’s lasted only a few years, it managed to create a cult of
followers with its unique and interesting design - achievable by adopting
the fuel tank above the front wheel.

As odd as it may look, this solution left room for a substantial luggage
compartment beneath the long seat, making the scooter a practical companion.

Originally, the 501 and 502 models were powered by a ČZ two-stroke
single-cylinder motorcycle engine, giving a top speed of 55 mph (88 km/h),
but Neil Eamonn Smith reckoned the eternal style and charm of the vintage
can be brought alive nowadays with the help of an 11kW electric motor. 

In 2012, the very first Čezeta type 506 prototype was made in Prague, and
now the company inches closer to make the funky-looking scooter available
for production. Its shape was subtly redesigned and simplified with
minimalist details, making for a sleek sculpture. 

The hand-built scooters will be available with an app allowing its users to
reprogram the speed and acceleration, check out the nearest charging
stations or listen to your favourite music via built-in Bluetooth speakers. 

Smith says that with the help of the 11kW motor, the Cezeta is fast enough
for use of highway speeds, reaching 90-110 km/h (56 – 68 mph). It will also
have a range of 100-200 km thanks to the long-range 5-10 kWh Panasonic
batteries, and a 50-year longevity. 

Interested? You can reserve yours now for as low as €7,000.
[© 2016 CARSCOOP & CARSCOOPS]
...
[dated]
http://electric-vehicle-discussion-list.413529.n4.nabble.com/EVLN-The-pig-is-back-yes-Czech-ikon-ezeta-scooter-s-e-comeback-tp4679485.html
EVLN: “The pig is back…yes.”> Czech-ikon Čezeta-scooter's e-comeback
'Has a rocket shape with a pig's face'
Jan 05 2016




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[EVDL] EVjobs: VW hiring production workers for 200mi e-SUV @Chattanooga-TN plant

[brucedp5 via EV]

http://www.timesfreepress.com/news/business/aroundregion/story/2016/jul/20/vw-looks-fill-chattanoogplant-new-production/376854/
VW looks to fill Chattanooga plant with new production, workers
July 20th, 2016  Mike Pare

[images  
http://media-cdn.timesfreepress.com/img/photos/2016/07/01/1467426345_102112cVW05_t1070_hbf924047e531507f0d4a994ff0a609a4c5ffdc8f.jpg
Staff Photo by Dan Henry/Chattanooga Times Free Press - 9/20/12. New
Volkswagen Passats are seen behind the Chattanooga assembly plant's building
front.
 / Dan Henry /Times Free Press

http://media-cdn.timesfreepress.com/img/photos/2016/07/12/1468377360_071316c01_JobFair.003_t755_h365c1c5a58f89f242e20a60cb8525bfa92cedeee.jpg
Dameyne Dixon, center, talks with Aerotek recruitment intern...  / Doug
Strickland /Times Free Press.
]

Weekly hiring, electric cars eyed in advance of start to SUV assembly

To apply  Interested workers also can go to www.aerotektn.com to apply.

A staffing contractor for Volkswagen in Chattanooga plans to hire about 25
people weekly over the next couple of months and 700 more employees by
year's end, an official said Tuesday.

"We're seeing hiring pick back up (for VW)," said Lucus Hiler of Aerotek,
which is bringing on production and logistics workers for the factory. "A
couple of classes have already been hired."

Nearly 25 people showed up in the first 10 minutes of a job fair at the
Tennessee Career Center in Eastgate Town Center on Tuesday, which was the
second such hiring event this month.

Samuel Houser said he once worked for a contractor at Volkswagen's plant and
he's hopeful of hiring on again.

"The money is excellent. The environment and supervision is helpful. It's a
company where you can grow," the Chattanooga man said.

VW is readying for assembly of a new midsize sport utility vehicle late this
year, and a top official said this week the company is weighing production
of electric cars in Chattanooga by 2020 in the wake of the emissions
scandal.

Mattie Moran, the Chattanooga Area Chamber of Commerce's director of
workforce development and education, said five more job fairs are planned
through the end of August for VW.

With unemployment down in Hamilton County to 3.7 percent in May, time will
tell how pressed Aerotek and VW will be to find workers, she said.

"Once we get past the first couple of job fairs, we'll see how it goes,"
Moran said. Unemployment dropped in May to a 15-year low in the county.

Starting pay for the VW jobs is $13 per hour with bonuses and pay rate
increases every six months. A $1 premium is added for night-shift work,
Hiler said.

People who want to work in production at VW are first employed for a period
of time at Aerotek before later being officially hired by the automaker.

VW is spending $900 million, including $600 million in Tennessee, to expand
its Chattanooga factory to make its new SUV. The company has said it plans
to ultimately hire 2,000 more employees to its workforce of about 2,500.

Beyond the new SUV line, VW could invest even more in Chattanooga if it
decides to also build electric vehicles at its production facility.

Hinrich Woebcken, the new head of VW's U.S. unit, said this week Volkswagen
plans to build electric vehicles in North America by 2020, potentially at
its Chattanooga plant, according to The Wall Street Journal.

He said Chattanooga or a production facility in Mexico are among options
being considered for the production of the new electric vehicles. He
declined to give specific details on the search, but said multiple models
will be built in North America.

Karl Brauer, senior director of insights for Kelley Blue Book, said if VW
could make an electric version of the SUV it plans to assemble at the plant
with a range of 200 miles or so before recharging, that would position the
carmaker well in terms of sales.

Such a vehicle also would give the automaker an appearance of being
innovative in that arena, he said.
[© timesfreepress.com]
...
https://aerotektn.selectrakonline.com/recruitment/recruit.aspx
Aerotek is accepting, processing and screening applications for assignments
at the Volkswagen of America facility ...




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Re: [EVDL] 24 cell BMS

[Cor van de Water via EV]

I am surprised at people wanting an extremely large balancing current
as that should never be needed unless your cells are either defective
(too high self-discharge in some cells) or you are drawing current
at inappropriate places (tapping the pack).
As an example, the Leaf BMS has 10 mA (0.01 Amp) balancing current
by using 430 Ohm balancing resistors.
All 96 series cells are only connected to the BMS which apparently is
guaranteed to draw extremely low current (everything is designed for
very low current in their BMS, even the voltage reference works with
microAmps of power supply) and the cell quality is apparently so good
that their self-discharge does not vary enough to need more than this
extremely low current.

There may be reasons to have a large balancing current, but they escape
me.

BTW, even though the Leaf BMS is part of the vehicle, it is
self-contained in the battery box with only OBD coming out for status
and it works and balances stand-alone as long as all 24 BMS front end
chips are powered (4 cells per chip). With the (free) Leaf Spy you can
monitor the BMS stand-alone, as long as you connect a Bluetooth ELM327
OBD interface.
There is a way to use the BMS on anything from 48 to 96 cell packs,
because the BMS has opto-isolation mid-pack, so you can overlap the BMS
inputs if you have less than 96 cells (but at least 48 cells). The only
thing you lose is the ability to break the pack midsection, unless you
add another opto coupler in the RS232 data line that daisy-chains all
front ends together.

Regards,

Cor van de Water 
Chief Scientist 
Proxim Wireless 
  
office +1 408 383 7626Skype: cor_van_de_water 
XoIP   +31 87 784 1130private: cvandewater.info 

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-Original Message-
From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of ken via EV
Sent: Wednesday, July 27, 2016 11:02 PM
To: paul dove; Electric Vehicle Discussion List
Subject: [EVDL] 24 cell BMS

 I haven't see the prices yet but I see this as a Advanced version of
cell
log. with very good features.

Smart Balancer & BMS series

http://www.chargery.com/BMS24.asp it balances at 1.5 amps.!!

they have other smaller cells version also.

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[EVDL] 24 cell BMS

[ken via EV]

 I haven't see the prices yet but I see this as a Advanced version of cell
log. with very good features.

Smart Balancer & BMS series

http://www.chargery.com/BMS24.asp it balances at 1.5 amps.!!

they have other smaller cells version also.

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