Envia-systems of
goed nieuws van de Accu-markt, 400 Wh/kg cellen in aantocht of worden ze al een tijdje verkocht ?
Die 240 Wh/kg die de huidige Tesla Model S nu bezit zullen snel in prijs moeten vallen, of Tesla gaat die 400 Wh/kg cellen (45 Ah/cell) moeten overnemen in hun modellen 2014, dat zou een tot
67 % grotere reikwijdte kunnen betekenen, even theoretisch nagerekend.
Prijs zou meer als halveren tot hoopvolle 125 $/Kwh.
http://enviasystems.com/technology/
Envia had maart 2012 geleden al een
+ 260 Wh/kg accupack op de markt (400 Wh/kg enkel in Labo), zelfs toen getest op een rollenbank door Tüv-D.
Een compleet modul van 200 kg dat 52 kWh leverde (auto Mindset).
http://www.goingelectric.de/2012/03/26/batterie/h-tech-mit-hoeherer-energiedichte-bei-lithium-ionen-akku/ook:
http://gizmodo.com/5889295/new-electric-car-battery-could-double-capacity-and-halve-costbetreft de prijs en kWh tov Tesla Model S en Nissan Leaf.
Dit was toen al ~ 10 % beter als die accucellen van Tesla Model S (240 Wh/kg) is daar te lezen.
voor de geinteresseerde ondernemer:
http://enviasystems.com/company/contact-us/De autosport gaat er blijkbaar ook mee rijden: (volgens de cijfers zijn dat nog de 260 Wh/kg cellen snel uitgerekend, accupack zal 50-52 kWh moeten hebben)
http://www.fiaformulae.com/guide/specificationDie 400 Wh/kg is gene zever hé, blijkbaar toen al (dec 2012) degelijk getest tov de cellen die Tesla Model S gebruikt:
http://enviasystems.com/announcement/
2. Test Samples
2.1 The Envia Systems cells are prototype lithium pouch rechargeable cells. The cells have a capacity of 46 Ah and an energy density of 400Wh/Kg. The cell's dimensions are approximately 97 mm wide, 190 mm long and 10 mm thick. The cell's approximate weight is 365 grams. Cell serial numbers are 400WhK-07-005-111205 (designated as 005) and 400WhK-07-006-111205 (designated as 006).
5. Conclusions
5.1 One of the highest energy cells used in consumer applications is the NCR18650A manufactured by Panasonic, which can be used as a comparative asset to the Envia cells. The NCR18650A cell specification claims 3100 mAh capacity, 3.6 V average and weighs 45.5 grams. The calculated energy density of this comparative cell would be approximately 245 Wh/Kg.
5.2 The test results from the prototype cells tested at Crane were in line with the results obtained from the manufacturer. The claims of 400 Wh/Kg were substantiated through the cycling tests performed at Crane. This is a 160% energy density increase over the industry standard indicated in paragraph 5.1.
Tesla Model S gebruiken die Panasonics NCR18650A (5.1) van 245 Wh/kg heb ik paar maal nagescheckt,
indien ze die Envia´s 400 Wh/kg inbouwen geeft dat
*hypothetisch x 1,6 : (ook als ze in hun accupack passen qua ruimte)
-
tot 536 km *geteste reikwijdte voor het 60 kW model (normtest 592 km). *door EPA
-
tot 682 km *geteste reikwijdte voor het 85 kW model (normtest 816 km). *door EPA
waardes uit:
http://en.wikipedia.org/wiki/Tesla_Model_S#Battery
Battery
The Model S is offered with two battery packs: a base model with a 60 kW·h battery expected to deliver 230 miles (370 km) and a 85 kW·h battery expected to deliver, according to Consumer Reports, 320 miles (510 km). These are Tesla Motors estimated ranges at a speed of 55 mph (89 km/h).[49] The EPA official range for the 60 kW·h battery pack model is 208 mi (335 km).[9] The official range for the model with the 85 kW·h battery is 265 miles (426 km).[6][50]
The lithium-ion battery consists of more than 7,000 battery cells for the 85 kW·h pack.[53] The battery pack, as of June 2012, used Panasonic cells with nickel-cobalt-aluminum cathodes.[1] The battery pack location underneath the cabin floor provides the Model S with a very low center of gravity.[54]
The Model S battery is guaranteed by Tesla Motors for eight years or 125,000 mi (201,000 km) for the base model with the 60 kW·h battery pack. All models with the 85 kW·h battery pack are guaranteed for eight years and unlimited miles.[55]
A battery replacement option may be purchased for a cost of US$10,000 for the 60 kWh battery and US$12,000 for the 85 kWh battery and will provide a replacement battery anytime after the 8th year of operation of the original battery.[56] 
(zullen ze ook serieus moeten herzien)
In 2013, Tesla canceled a 40 kW·h version of the car due to lack of demand, stating that only 4% of pre-orders were for the 40 kWh battery option. The customers who ordered this option have instead received the 60 kWh pack, but range is software limited to 40 kWh (142 miles of rated range). It will still have the improved acceleration and top speed of the bigger pack, so will be a better product than originally ordered, and can be upgraded to the range of the 60 kWh upon request by the original or a future owner for US$11,000.[57]
Als dan nog de prijs voor die accupacks
véél meer dan halveert moeten we zeker de titel van dit topic aanpassen naar "beginnen interessant te worden".
Hieronder nog een interessante wegsite (alweer Duits sorry) qua nieuwtjes:
http://www.batteriezukunft.de/kosten-prognosen/2011-2012maar die tabel van batterijprognoses (tot 2035 zelfs) mag in de vuilbak, enkel Volkswagen (helemaal onderaan) had het bij het rechte eind:
