Tesla accidentally reveals Model 3 efficiency hinting at impressive range

Ahead of the Model 3 event today, Tesla has been making several changes to its website and it apparently accidentally resulted in Tesla disclosing the average efficiency of the vehicle. The bit of information points to the potential for a truly impressive range. more…

via Tesla accidentally reveals Model 3 efficiency hinting at impressive range — Electrek

Tesla Model X officially becomes highest safety rated SUV with 5-star rating in every safety category

Tesla did it again with the Model X. NHTSA confirmed today that after crash testing Tesla’s all-electric SUV, it received a 5-star rating in every safety category – making it the highest safety rated SUV. Of all the vehicles tested by NHTSA, only the Tesla Model S bested the Model X for the lowest probability of injury in a…

via Tesla Model X officially becomes highest safety rated SUV with 5-star rating in every safety category — Electrek

Tesla aims for the Model 3 to be the first mass-market autonomous car

It’s fair to say that most of the ~400,000 people who reserved the Tesla Model 3 did it because it will likely become the first long-range relatively affordable electric car to be mass-produced. But it also became clear that Tesla also aims for the Model 3 to be the first mass-market autonomous car – years ahead…

via Tesla aims for the Model 3 to be the first mass-market autonomous car — Electrek

Analyst warns of Tesla’s Autopilot machine learning rendering all other cars obsolete

Before introducing the second generation Autopilot hardware, Tesla CEO Elon Musk said that once the first truly self-driving car is available, all other vehicles without the technology will have a “negative value”. Echoing the idea, Morgan Stanley analyst Adam Jonas said this week that they started warning their clients that if Tesla is successful in enabling fully…

via Analyst warns of Tesla’s Autopilot machine learning rendering all other cars obsolete — Electrek

Tesla Model 3’s user interface is designed with self-driving in mind, Elon Musk says no head-up display

After almost a year of rumors and speculation, Elon Musk did everything but confirmed today that the Tesla Model 3 will not feature a head-up display. Interestingly, Musk didn’t offer any alternative for the instrument cluster and instead, he said that drivers don’t need the information as much due to autonomous driving. more…Filed under: Uncategorized

via Tesla Model 3’s user interface is designed with self-driving in mind, Elon Musk says no head-up display — Electrek

Tesla Gigafactory 1: new aerial picture shows latest progress at the battery factory

Three years into the project, Tesla’s Gigafactory 1 in Nevada is now more than 2 months into its first battery cell production. The factory is also now producing both Powerpack 2 and Powerwall 2 battery packs for stationary energy storage to use those new cells and finally, it is preparing for the start of Model…

via Tesla Gigafactory 1: new aerial picture shows latest progress at the battery factory — Electrek

Tesla Model 3 will give ‘superhuman’ safety to driver and be ’10x safer than current cars’, says Tesla analyst Adam Jonas

Even though Tesla CEO Elon Musk already announced that the company aims for the Model 3 to score 5 stars in every safety category, Morgan Stanley’s Tesla analyst Adam Jonas says that the vehicle’s safety could be an underrated feature that will give the vehicle a competitive edge. Jonas sent a new note to clients today…

via Tesla Model 3 will give ‘superhuman’ safety to driver and be ’10x safer than current cars’, says Tesla analyst Adam Jonas — Electrek

The Cells in Tesla’s 90 kWh Model S that “Partially Use Silicon” – What Can They Be?

One thing noted in Tesla’s Model S update announcement back in July is the introduction of silicon in the anode of the cell. This change enables the battery pack to deliver 90 kWh of energy on a single charge, a roughly 6% boost from the previous 85 kWh system. Although Elon Musk was trying to keep it low by describing the move as “a baby step in the direction of using silicon”, the news had stirred up some excitement in the battery community. It had been long overdue to see silicon anode’s debut in an electric car (EV) battery.

Silicon has the potential to help lithium-ion batteries meet 350 Wh/kg on the cell level and 235 Wh/kg on the pack level (United States Advanced Battery Consortium USABC CY 2020 goals for EV batteries). The state-of-the-art graphite does not have this potential; the highest energy density reported with graphite anode was less than 250 Wh/kg to our knowledge (243 Wh/kg for Panasonic 3400mAh NCR18650B cell). Also, Argonne National Lab reported by simulation that the energy density of packs would not be able to exceed 200 Wh/kg if only graphite was used. This promise of silicon comes from the fact that 1g of silicon can store 3578 mAh of charges while graphite can only do 373 mAh/g. The energy of a cell or a pack is simply the product of the voltage and the amount of charges. It should be mentioned that this 10-fold difference in specific capacity cannot be translated into 10-fold difference in specific energy mainly due to the weight from other components in a cell.

The interest in silicon anode started in the early 80s and the nanopowder approach that prevails now was first explored by Hong Li et al in 1999. However, even up to now, silicon shows impractical short cycle life in the pilot production scale, stemming from the 280% volume change between the charged and the discharge states as well as the physical properties of silicon and its lithium alloys. Panasonic was reported in 2009 to have been developing silicon-based 4000mAh 18650 cells for fiscal 2012 volume production, but they are not yet available to our knowledge.

Currently, 5-10% of silicon can be blended with graphite as the anode material and the cell can exhibit comparable cycle life as graphite does. This probably is what “partially use silicon” meant in Elon’s comment.

 

The Model S had been using Panasonic’s 3100mAh NCR18650A before the update announcement. The cell is based on NCA cathode/synthetic graphite anode couple (NCA refers lithium nickel cobalt aluminum oxide, LiNi0.8Co0.15Al0.05O2). It should be acknowledged that Tesla represents the technical approach on using 18650 cells for EV applications.

The 3400mAh NCR18650B from 2012 is with the same electrode chemistries. It has been seen since then that 3 newer Panasonic 18650 cells might have silicon (silicon oxide actually) mixed in the anode – 3400mAh NCR18650BF, 3500mAh NCR18650GA and 3600mAh NCR18650G.

NCR18650BF is 2g lighter than NCR18650B with the same rated capacity and nominal voltage, according to the tentative specs available online. The energy density is 248 Wh/kg (a slight 2% increase based on NCR18650B). NCR18650GA’s energy density was estimated at 255 Wh/kg (a 5% increase based on NCR18650B), although the cell is a bit heavy at 48.0g. NCR18650G has high capacity and there is some improvement on weight and dimensions from NCR18650GA, so the estimated energy density was 269 Wh/kg (a 11% increase based on NCR18650B). emvalley.com/news

 

 

 

Tesla Model 3: Elon Musk explains how the delivery process will work

There are a lot of things that are expected to change for Tesla with the upcoming massive increase in the number of vehicles in its fleet due to the launch of the Model 3. Additional Superchargers, Service Centers and other infrastructure will be needed to support the new fleet. With a backlog over 400,000 reservations…

via Tesla Model 3: Elon Musk explains how the delivery process will work — Electrek