electric car and transport, wire news

[Christophe]

transportation, electric / battery-toshiba-SCIB-recharged en 6-minutes-a-500kw-t15395.html

[chatelot16]

finally the performance of the 18650 lithium ion computer element is quite sufficient to make a good electric car

the only problem is the price ... I see 2.5 euro / element ... if it takes 3000 it's 7500 euro + bms and editing

but I hope we can find these items cheaper in large quantities

there is soon enough to practice! which has addresses to buy lithium ion element at the best price

[Christophe]

Frankly I do not like batteries made up of thousands of small 18650 elements ...

Because a single element that is HS may damage many others by snowball effect unless it is isolated quickly (and permanently) and as well according to the XSYP configuration (X elements in Series, Y elements in Parallel ) a faulty element will systematically influence other elements ... for example the other elements in P with him will have to work more in case of isolation and if they will be short circuit in case of short circuit in only one of the elements. ..

This also poses a serious balancing problem: in theory each of the thousands of 18650 must be loaded individually and see its own regulated voltage precisely!

Is this the case in practice? Even at Tesla, I do not know but if that's the case it would require at least 1 wire by elements and electrical isolation of each element when recharging ...

In short, I prefer a battery made up of a few dozen unique and identical elements much more powerful (and interchangeable in the event of failure) than thousands of "batteries" which are not replaceable in the event of failure ...

[chatelot16]

the large number of elements is rather an advantage ... we find mosfet with low resistance to ensure the commutation

we can thus make a setting of many of the element completely varaible! each element is either put in the chain or put out of circuit

during charging we put all the elements in series, and a microcontroller monitors the voltage of each element, each time an element has too much tension we disconnect it and we reconnect it to finish loading it when the current of the best element will decrease

to the discharge we conect just the right number of element to provide the right voltage to the engine ... it does not discharge them all at the same time but it does not matter ... the controller shares the work between the different each one in turn to use them all ... and of course the controller records everything to calculate the performance of each floor

of course it can not be 3000 element in series, it would make 12000 v at the beginning of load

we can put a number of elements in parallel to make a total reasonable tension

if a single element is defective in a parallel stage, the controller will notice a poor performance of this floor: it is time to dismount manually to remove the defective element

given the large number the element can be shared together in several tracks in series indepandante ... precisely in order to equip the car of several pack indepandant to have the freedom to choose the weight of battery according to its use or his financial means

as long as i only saw electric cars with special batteries i considered them out of my reach ... with this idea the standard element it becomes interesting to experiment a small capacity for electric scooter ... and why not restart an electric 106 that has no battery

but the main question remains: what is the wholesale price of the 18650 element?

whatever the capacity ... the weight is variable with the capacity and the elements with strong capacity do not necessarily have the best relation capacity weight and even less the best relation capacity price

[Remundo]

aaahhh balancing problems with Lithium ...

the energy density is good, but there are some other worries ... In the days of the nicad, we were better; everyone is equalized by overload and forward the music ...

[chatelot16]

equalized by overload ... and water cooling is required to avoid overheating ... and the efficiency is poor

when I reload 18650 element recovered in computer batteries put in the trash the element in good condition remain cold after load ... certain element heat miserably and the charger does not finish to load them ... and overchargearit if I did not cut less even ... but by doing another cycle discharge charge everything is fine, it does not heat any more

a management system of a large number of elements will therefore have to be sufficiently sophisticated

but it seems to me easier to connect elements together than to make big elements: if there is a defective zone in a big element, it's dead! impossible to dismount, and even worse: it's dangerous! if the defective zone absorbs the energy of the rest of the element it explodes

with a multitude of elements each element contains only its own energy and must not be able to take the energy of others ... or to be able to take the energy of only a limited number of other

any information on the existing battery pack would be good to take

if I managed to make a battery controller that correctly exploits 50 original recovery element it will be proof that it is possible on a larger scale, even more easily with new elements

but precisely an assembly that only works with nine is not a feat ... an assembly that works with old people proves that the nine will walk long to be old

I had begun to study this technique of setting in serie in variable number with lead element of 2 V and a microcontroleur indepandant for 2 stage in series: mass of the micro controller at the common point of 2 element ... switching of the element from the top by the more switching of the bottom element by the less ... it allows the microcontroller to measure the voltage without isolation problem ... and for the other floor it is better that each pair of floor has own microcontroller ... it's more economical and more precise than a high-voltage measuring system ... it's also more practical for the microcontroller to control the compositing mosfer

finally for the project with lead battery it was rather electromechanical bistable relay ... because there are 10 years and I could not find an economic mosfet

now it is clear that we find mosfet more economic than contact ... there is in all computer battery pack ... their resistance is so low that they do not need a radiator

it really makes you want to enjoy components that have been optimized for the computer ... it's cms, it comes automatically, the complexity does not cost much

[moinsdewatt]

Bolloré will send Bluebus to Brussels

Sybille Aoudjhane the 18 / 10 / 2017 TO 10H54

Good news The Société des transports intercommunaux de Bruxelles (STIB) has just announced that it will equip the electric buses of the Bolloré Group: the Bluebus. It is the first electric bus to integrate this network.

The Bolloré Group has just signed a contract with Brussels to supply the city with Bluebus, its electric buses. STIB launched the 2016 call for tenders with the manufacturers. The Bolloré group has won for four years.



These are five electric buses of twelve meters, having a capacity of 91 to 101 people who will enter the Belgian city. They are equipped with eight batteries (in Lithium Metal Polymer) with a minimum autonomy of 180 kilometers. They will be delivered during 2018.
"This is the first time that our 12-meter model has moved beyond our borders," said Marie Bolloré, CEO of Blue Solutions, quoted in a press release.

https://www.usinenouvelle.com/article/b ... es.N602158

[moinsdewatt]

La Rochelle adopts Heuliez GX 337 electric bus

20 / 10 / 2017 - A new pioneering city.

There were not many electric cars in France, there are 20 years, but there was a city where there were more than anywhere else, it was La Rochelle. And when some see car-sharing as a new idea, it already existed 20 years ago in La Rochelle. With electric cars! Today, the city is talking about her commitment to electro-mobility, by acquiring 3 electric buses.



These are Heuliez GX 337 buses. Either French design and manufacturing vehicles. Even though Heuliez Bus belongs today to the international group CNH Industrial. The batteries are also French, they come from Forsee Power. In these vehicles, they have a capacity of 360 kWh, which gives the buses a day of autonomy. Charging takes place at night, at the depot.

Heuliez Bus and Forsee Power have recently signed a long-term partnership agreement, which will allow the construction of more 100 electric buses each year. RATP would soon be a customer, and several other large French cities too.

http://www.moteurnature.com/29097-la-ro ... liez-gx337

[moinsdewatt]

[Electric vehicle] Four European car groups launch the first high-speed charging network

Aurélie M'Bida Factory New the 03 / 11 / 2017

The BMW, Daimler, Ford Motor, and Volkswagen groups announced Friday November 3 the creation of a European joint venture for a high-speed charging network of electric vehicles. 400 charging stations will be available for drivers by 2020.

Four major car manufacturers in Europe have just hit a big blow at the end of last week, firmly engaging in the electric adventure. The German groups Daimler (Mercedes, Smart), BMW (BMW, Mini, Rolls-Royce), Volkswagen (VW, Seat) with the support of its Audi and Porsche brands, as well as the American Ford Motor have launched the Ionity joint venture . "Creating the first pan-European network of ultra-fast charging stations is essential for electric vehicles to continue their deployment in the automotive market. Ionity's ambition is to provide individuals with fast and easy charging, notably through direct payment. online and thus facilitate long journeys in electric vehicles, "said Michael Hajesch quoted in the press release.

Ionity, headquartered in Munich, will open its first 20 stations to the public this year in Germany, Norway and Austria, a distance of 120 km separating each one. The network must switch to 100 stations in 2018. The consortium is led by Michael Hajesch (CEO) and Marcus Grill (COO). The Ionity team will have 50 employees from 2018 and will continue to grow.

Use existing infrastructure

With a capacity of 350 kW, each network terminal will use the European charging standard while significantly reducing charging time compared to existing systems. In order to propose the most relevant mesh possible, Ionity is currently in discussions with the existing infrastructures of each country, private or public. The investment in Ionity reflects the commitment of the OEM partners to promote EVs and builds on international cooperation in the automotive industry.

The market for electric vehicles is struggling to develop due to battery autonomy problems and traditional manufacturers, exposed in this segment to the competition of US leader Tesla, are working to develop fast charging systems for limit waiting times at the terminals.

https://www.usinenouvelle.com/article/v ... de.N609438

[moinsdewatt]

And here is Tesla's electric truck unveiled by Elon Musk

Aurélie M'Bida Factory New the 17 / 11 / 2017

The Californian manufacturer has just introduced the long-awaited 100% electric semitrailer that it has been developing in secret for over a year.



We had to wait a bit. Since announcing his plan in July 2016, Elon Musk has said little about the electric semi-trailer his company was promising to launch. After several false starts, a prototype of the machine was finally unveiled to an audience of "happy few", Tesla customers, investors and some journalists on the evening of Thursday, November 16. A futuristic design, an imposing size and a high autonomy for a machine of some 36 tons, the manufacturer of electric vehicles does not deny its habits.

"Even more aerodynamic than Bugatti Chiron," said the CEO of Tesla bluntly, during the event broadcast live on his site and on social networks from Hawthorne (California), where the manufacturer's design offices are located and the headquarters of the aerospace company he also co-founded, SpaceX. On the technical sheet side, the Tesla Semi is equipped with four independent wheels. Four (electric) motors support a vehicle which can accelerate from 0 to 100 km / h in 5 seconds.



800 km of autonomy

Confident in the quality of his product, Elon Musk promises that his electric truck's transmission is "guaranteed to last 1 million miles" (1,6 million km), or more than 40 trips around the Earth.

In addition, Tesla's electric truck has a range of 800 km (500 miles) when "loaded to its maximum weight and at highway speeds." “As 80% of journeys are less than 400 km (250 miles), that means that we can go to our destination and come back without recharging,” said the creator of the brand.

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https://www.usinenouvelle.com/article/e ... sk.N615513