Re: [EVDL] BMS for leaf cells
Hi Lawrence, You might have a look at this... http://liionbms.com/php/bms-selector.php I don't know how up to date it is... it is also provided by Elithion who make the Lithiumate Lite Pro BMMS', so not exactly unbiased, but it seems pretty fair to me! Regards, MW. On 3 Apr 2014, at 18:37, Lawrence Rhodes wrote: I got a deal for a Leaf pack for 2500 dollars. However I've gotten an estimate for thousands for the BMS. Is there a reliable BMS I don't have to spend thousands on? Will be dividing up the pack into strings of parallel and series to make 156vdc after charging. Also with Curtis controllers is it a good idea to go lower voltage as lithium is stiff/doesn't sag much just wondering? Lawrence Rhodes ___ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
[EVDL] EVLN: BMW electric conversion by Northshore Auto-Tech students
http://www.nwnews.com/index.php/local/news-features/9404-bmw-s-electric-conversion-powered-by-northshore-students BMW’s electric conversion powered by Northshore students 01 Apr 2014 by Shannon Michael [image / Shannon Michael http://www.nwnews.com/images/stories/033114/BMW.jpg BMW - Students in the Northshore Automotive Technology class at Bothell High check out their work under the hood of the BMW that’s almost done with the conversion from gas to electric. The car will be on display at the Northshore Schools Foundation Luncheon on April 8 ] Who knew that STEM (Science, Technology, Engineering, and Math) curriculum is a component of high school auto shop classes today? Bothell High’s Northshore Automotive Technology instructor Patrick McCue and his students know STEM is a major component of what they do in the class. His students, as part of the class’s curriculum, began converting a BMW from gas to electric in early 2013. The car will be on display at the Northshore Schools Foundation Luncheon on April 8 at the Lynnwood Convention Center to showcase what Northshore students are learning in this hands-on skills class. Two students, Scott Vandivort and Mark Clausen, both BHS 2013 graduates, took the lead on the car’s conversion last year, and entered it in the Imagine Tomorrow competition held at Washington State University. Now attending Edmonds Community College, Vandivort still assists current students on the conversion after school as time permits. Vandivort knew before he got involved in the automotive program that he was interested in studying electrical engineering. “This was a once-in-a-lifetime opportunity that rarely people get to have,” he said. His goal is to become an electric sports car designer. McCue acknowledges he hasn’t had too many students interested in studying electrical engineering take his class, but with the advances in electric cars, he sees that changing in the near future. Students are currently converting all lights, both interior and exterior, to LED lights. “By going to LEDs, we’re taking a significant amount of amperage out of the system. All of the lights in the car, including all the interior lights would probably take 20-25 amps to run, but with the switchover to LED, they will be able to cut it down to about 5 amps,” McCue said. Companies are working with the class project, including Kent-based Diamond Lighting, who is prototype beta testing LED headlights on the car. To McCue’s knowledge, there are no other schools in the state that are doing this level of automotive project in the classroom. “No one has really done lithium iron phosphate batteries,” he said. The batteries are on par with what Tesla has in their cars, but they use a different kind of lithium battery. The BMW has 80 of their type of lithium batteries in the car, whereas a Tesla has 7,000 of the special lithium batteries they use. The Tesla has a great battery system and great range and performance, McCue said, while the BMW’s range is currently about 100 miles. The charging system in the BMW is accessed through where the gas cap used to be. It uses a 220-volt charging system and can be charged at any public charging station in the area. The goal for the remainder of this school year for McCue and his class is to finish the car, which he anticipates will happen in the next few weeks, then they will start driving it and troubleshooting any issues. Next, students will start collecting data to see how much electricity they put into the car and see how many miles they get out of it. This is where science and math come into the project. “The kids and I will talk about the science and math behind how much energy we’re putting in, how much the energy costs, and how many miles we’re getting out of it,” McCue said. The long-term goal of the car is for the students to do science, engineering and math. “We’ve done a lot of engineering in the last two years, and we’re just getting to the science and math behind it, too,” he said. A secondary goal of the car this year is to participate in drag racing. The school district has given permission for the car to compete at Pacific Raceways in Kent. “There is an organization for drag racing cars called National Electric Drag Racing Association, and within the group there is a classification for high school built electric cars,” McCue said, adding, “We’ve gone on the website and looked up the records, and we should be able to set a world record with this car.” They came to that conclusion using science and math to calculate what they think the car’s ability will be to beat the current record. No students will race the car. While a little more than half of McCue’s students have previous experience in working on cars before taking his class, about a third have no experience with the technology. So, he reduces the complexity of the BMW project down to teaching students how to create an electric bicycle. “An electric bicycle is pretty simple: throttle,
[EVDL] EVLN: '72 VW Bug Nation Ford HS Engineering Club Project (videos)
NF Engineering Students are seeking donation$ for their EV project
http://www.wcnc.com/on-tv/larrys-look/Larrys-Look--Nation-Ford-High-School-Engineering-Club-253575501.html
Larry's Look | Nation Ford High School Engineering Club
by WCNC.com Staff April 2, 2014
[videos flash
http://www.youtube.com/watch?v=lXmyZ9i95Ns
Nation Ford High School Engineering Club
Nation Ford· Mar 20, 2014
Engineering students from Nation Ford High School created this video to
solicit support from local businesses to finish their electric vehicle
conversion project.
]
FORT MILL, S.C. -- Imagine taking a classic 1972 VW Bug and turning it into
an electric vehicle! That’s exactly what some talented students are doing
in the Nation Ford High School Engineering Club.
Of course, it’s a totally hands-on experience in this “science project,” but
the students are also involved with the project management and marketing of
this effort. When they finish, the car will be used to get younger students
excited about gaining knowledge of engineering and the energy industry.
This morning on Larry’s Look, we got a behind-the-scenes look at the
process, that’s taking place in the Automotive Technology Building on the
Nation Ford High campus. We talked to several of the students, plus their
advisor Matt Lawhun. Matt teaches engineering at Nation Ford. It was
actually his idea to start the ambitious project.
The students created a “video proposal” to send to companies to help fund
their project:
[© 2014 WCNC-TV]
...
http://www.afdc.energy.gov/locator/stations/results?utf8=%E2%9C%93location=29715filtered=truefuel=ELECowner=allpayment=allev_level2=trueradius=trueradius_miles=30
Nearby public EVSE
http://electric-vehicle-discussion-list.413529.n4.nabble.com/template/NamlServlet.jtp?macro=search_pagenode=413529query=vw+bug
VW bug conversions - posted on the evdl.org archive
For all EVLN posts use:
http://electric-vehicle-discussion-list.413529.n4.nabble.com/template/NamlServlet.jtp?macro=search_pagenode=413529query=evlnsort=date
Here are today's archive-only EV posts:
EVLN: NYC's CitiBike Shared Electric-Bicycles
EVLN: FEDDZ e-scooter, Light, Agile, Green for the City (video)
EVLN: Fastned using SolarEdge for Netherlands’ 200 L3/T3 EVSE network
EVLN: Tesla lobbying to ditch side mirrors
EVLN: Colombian Race-Driver Montoya Loves His Tesla-S
+
EVLN: BMW electric conversion by Northshore Auto-Tech students
{brucedp.150m.com}
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View this message in context:
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Sent from the Electric Vehicle Discussion List mailing list archive at
Nabble.com.
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Re: [EVDL] BMS for leaf cells
Sorry, I see I typo'ed 3/18 should be 3./18. JR talks about the LiMn chemistry from the POV of what voltages to use with BB'ing, and why he thinks BB'ing is appropriate. There is a lot of good information about how the Leaf packs he has are constructed. It sounds like he doesn't expect the 80% life to be nearly what LiFePO4 would be. But still good. He is very happy with how it is put together. Lot's of nice (over)engineering. Of course, he is selling them, so there may be some bias. You can see a lot watching the videos. I couldn't take issue with anything I saw or that he said. Anyway, I think you could trade off the cost of a BMS for the labor to BB the pack. That is a trade off I almost always make by nature. On Thu, Apr 3, 2014 at 6:45 PM, Michael Ross michael.e.r...@gmail.comwrote: A DIY'er might consider bottom balancing. EVTV is doing just that with multiple Leaf packs they picked up from Israel. I think the 3/21 episode covers this a bit. I have not watched 3/18 yet. http://www.evtv.me.s3-website-us-east-1.amazonaws.com/vidarch.html On Thu, Apr 3, 2014 at 2:55 PM, David Rees dree...@gmail.com wrote: On Thu, Apr 3, 2014 at 10:37 AM, Lawrence Rhodes primobass...@sbcglobal.net wrote: I got a deal for a Leaf pack for 2500 dollars. However I've gotten an estimate for thousands for the BMS. Is there a reliable BMS I don't have to spend thousands on? Will be dividing up the pack into strings of parallel and series to make 156vdc after charging. MiniBMS would be an option if it supported different voltage cutoffs (does it? I don't know). But even then you need 48 cell-modules if you split the pack in half which is going to cost you about $700. -Dave ___ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA ( http://groups.yahoo.com/group/NEDRA) -- Put this question to yourself: should I use everyone else to attain happiness, or should I help others gain happiness? *Dalai Lama * Tell me what it is you plan to do With your one wild and precious life? Mary Oliver, The summer day. To invent, you need a good imagination and a pile of junk. Thomas A. Edisonhttp://www.brainyquote.com/quotes/quotes/t/thomasaed125362.html A public-opinion poll is no substitute for thought. *Warren Buffet* Michael E. Ross (919) 550-2430 Land (919) 576-0824 https://www.google.com/voice/b/0?pli=1#phones Google Phone (919) 631-1451 Cell (919) 513-0418 Desk michael.e.r...@gmail.com michael.e.r...@gmail.com -- Put this question to yourself: should I use everyone else to attain happiness, or should I help others gain happiness? *Dalai Lama * Tell me what it is you plan to do With your one wild and precious life? Mary Oliver, The summer day. To invent, you need a good imagination and a pile of junk. Thomas A. Edisonhttp://www.brainyquote.com/quotes/quotes/t/thomasaed125362.html A public-opinion poll is no substitute for thought. *Warren Buffet* Michael E. Ross (919) 550-2430 Land (919) 576-0824 https://www.google.com/voice/b/0?pli=1#phones Google Phone (919) 631-1451 Cell (919) 513-0418 Desk michael.e.r...@gmail.com michael.e.r...@gmail.com -- next part -- An HTML attachment was scrubbed... URL: http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20140404/0c581fb1/attachment.htm ___ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
