A million mile batery

Baterije bodo tako pomembne da si zaslužijo svoj forum
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warpedone
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A million mile batery

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https://electrek.co/2019/09/07/tesla-ba ... bot-taxis/

Otrok partnerstva Jeff Dahn in Tesle začenja kazat svoje sposobnosti.
“We present a wide range of testing results on an excellent moderate-energy-density lithium-ion pouch cell chemistry to serve as benchmarks for academics and companies developing advanced lithium-ion and other “beyond lithium-ion” cell chemistries to (hopefully) exceed. These results are far superior to those that have been used by researchers modelling cell failure mechanisms and as such, these results are more representative of modern Li-ion cells and should be adopted by modellers. Up to three years of testing has been completed for some of the tests. Tests include long-term charge-discharge cycling at 20, 40 and 55°C, long-term storage at 20, 40 and 55°C, and high precision coulometry at 40°C. Several different electrolytes are considered in this LiNi0.5Mn0.3Co0.2O2/graphite chemistry, including those that can promote fast charging. The reasons for cell performance degradation and impedance growth are examined using several methods. We conclude that cells of this type should be able to power an electric vehicle for over 1.6 million kilometers (1 million miles) and last at least two decades in grid energy storage.”
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Tole zna bit glava zvezda Tesla Battery Day naslednje leto.
technic, CRF, Marko007, Dzun Tao, BogyX, edi-b
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Re: A million mile batery

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Dzun Tao
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Argo
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Re: A million mile batery

Odgovor Napisal/-a Argo »

Kaj bom s tako baterijo. Ne mislim imet istega avta do smrti. Meni je dovolj oz. polna kapa če zdrži max 500k km, pol pa avto v prešo. Te blazne cifre so bolj za komercialno rabo (taxi, šleperji,...)

Dahn my azz. Sami kitajci.
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warpedone
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Re: A million mile batery

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Ti nič, ti lepo počakaj na svoj X.
Argo
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crunchy
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Re: A million mile batery

Odgovor Napisal/-a crunchy »

Samo komentar slike (gre za prvi prispevek). Zanimivi "oulayerji", kjer kapaciteta v naslednjem ciklu kar pade iz 100% na 70% (dvakrat!) oziroma kar zraste iz 90% na 100% (ena meritev). Kljub enakomernim ostalim rezultatom bi se jaz vprašal kaj se je zgodilo. Napaka v meritvah ali nekakšni čudni procesi v bateriji? Bomo že izvedeli, če/ko pridejo na tržišče.
Dzun Tao
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warpedone
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Re: A million mile batery

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Ob takih prigodah se vedno spomnim, da se je govorilo da je najtežji predmet v 1. letniku štrom-faksa Meritve.
Spomnim se tudi "prečrtanih" rezultatov na fizikalnih kolokvijih, ker je bila cifra zapisana z eno decimalko preveč.
Pa še tiste, da uspelega fizikalnega poskusa nikakor ne smeš ponavljat.
Vse skup pomeni, da kljub maksimalnim naporom po kontroli 'vseh' vplivov, vseeno ne kontroliraš vsega in so vmes 'neznanke', katere morda speglaš s ponavljanjem in variranjem čimveč kontroliranih elementov.

Vse skup je akademija, poanta je da so uspel najt alternativni aditiv, ki dela enako dobro kot problematični. In ga patentiral :P
Hecno, da je osnova 60 let stara diploma...
Dzun Tao
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Stromcek
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Re: A million mile batery

Odgovor Napisal/-a Stromcek »

https://youtu.be/69-_B-7G4ks

Bravo, Tesla, tudi če je samo pol tega res
edi-b, DGJ, Vodokotlic
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warpedone
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Re: A million mile batery

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Zgrešili smo live webinar, ki žal ni bil posnet: https://members.evsociety.ca/event-4635260

Nekaj zapiskov:
TL;DR: proven ability to exceed million mile durability with NMC532 plus electrolyte additives, enabling efficient V2G
* Useful electrolyte additives react before other electrolyte components, creating passivating films
- passivating films protect battery components while allowing Li+ transport
- examples: 2% by weight vinylene carbonate, 1% LiPF2O2
* Finding good battery chemistries is hard 😉
* Why care about million-mile batteries? V2G without hurting battery lifespan
* Why care about V2G? Battery supply
* Grid, utility, and construction should prepare for V2G and require V2G capabilities
* Vehicle packs should be designed & manufactured to support a second life as storage
* NMC523 cells with appropriate additives can outlive BMS and charging systems
* Q&A
- House rule: no Tesla questions
- Declined to discuss LFP for 4680
- Canada wants battery manufacturing (mentioned E-One Moli Energy)
- At Tesla's request, Cobalt content is getting lower and will disappear
- Need for V2G-capable vehicles and chargers (cost issues)
- Clarified that the "million mile battery" can handle full cycles 0-100% without strain
- ...plus lots more Q&A that didn't I didn't try to capture
Vodokotlic, Ogo, matija
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Ogo
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Re: A million mile batery

Odgovor Napisal/-a Ogo »

PPT to XLSX konverzija je ponavadi problem. :)
Gasper
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Re: A million mile batery

Odgovor Napisal/-a Gasper »

Govori o dolgoživosti NMC532
Potem pa da Tesla zmanjšuje kobalt. To potem nekako ni več NMC532, ker ta oznaka nam pove, da je kobalta kar konkretno.

Torej kaj sedaj ali nikljeva kemija obstaja milion miles z zelo malo kobalta? Po mojem da (še) ne.
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