When he’s not busy with his day job as professor of computer and automotive engineering at Weber State University, [John Kelly] is a prolific producer of educational videos. We found his video tracing out the 22+ meters of high voltage cabling in a Tesla Model S (below the break) quite interesting. [John] does warn that his videos are highly detailed and may not be for everyone:
This is not the Disney Channel. If you are looking to be entertained, this is not the channel for you.
We ignored the warning and jumped right in. The “high” voltages in the case of an electric vehicle (EV) like the Model S is approximately 400 volts. Briefly, external input via the charge connector can be single or three phase, 120 or 250 VAC, depending on your region and charging station. This get boosted to a nominal 400 VDC bus that is distributed around the various vehicle systems, including the motors and the battery pack.
A new biologically inspired battery membrane has enabled a battery with five times the capacity of the industry-standard lithium ion design to run for the thousand-plus cycles needed to power an electric car.
A network of aramid nanofibers, recycled from Kevlar, can enable lithium-sulfur batteries to overcome their Achilles heel of cycle life—the number of times it can be charged and discharged—a University of Michigan team has shown.
“There are a number of reports claiming several hundred cycles for lithium-sulfur batteries, but it is achieved at the expense of other parameters—capacity, charging rate, resilience and safety. The challenge nowadays is to make a battery that increases the cycling rate from the former 10 cycles to hundreds of cycles and satisfies multiple other requirements including cost,” said Nicholas Kotov, the Irving Langmuir Distinguished University Professor of Chemical Sciences and Engineering, who led the research.
Last summer, the automaker said that it had deployed 3.2 MW at the site. At the time, Tesla also changed its goal to deploy 24 MW instead of 70 MW on the rooftop of the factory, which itself is now smaller than originally planned. The company said that it believes this would still be enough to be the largest rooftop deployment of solar power.
Catherine Labadia, an archaeologist at the State Historic Preservation Office, was on vacation when the first text came in from fellow archaeologist David Leslie. The picture on her phone was of a channel flake, a stone remnant associated with the creation of spear points used by Paleoindians, the first humans known to enter the region more than 10,000 years ago. “I responded, ‘Is this what I think it is?’” “It most definitely is,” texted back Leslie, who was on site at the Avon excavation with Storrs-based Archaeological and Historical Services (AHS). “It was all mind-blowing emojis after that,” Labadia says.
But that first picture was just the beginning. By the time the excavation on Old Farms Road was completed after a whirlwind three months in the winter of 2019, the AHS team had uncovered 15,000 Paleoindian artifacts and 27 cultural features. Prior to this dig, according to Leslie, only 10–15 cultural features — non-movable items such as hearths and posts that can provide behavioral and environmental insights — had been found in all of New England.
The site is significant for more than the quantity and types of artifacts and features found. Early analyses are already changing the way archaeologists think of the Paleoindian period, an epoch spanning from about 13,000 to 10,000 years ago of which little is known due to relatively scant archaeological evidence. The forests of that time, for instance, were likely made up of more diverse species of trees than previously thought. And that opens up new interpretations for what Paleoindians ate. Remains found at the excavation also suggest — for the first time — that Paleoindians and mastodons might have overlapped in the region.
A new smart type of food packaging promises to eliminate food poisoning by killing harmful bacteria.
According to scientists, the packaging destroys hazardous bacteria like E.coli, Salmonella, and Listeria, allowing meat, fish, fruit, and vegetables to last longer.
“Food safety and waste have become a major societal challenge of our times with immense public health and economic impact which compromises food security. One of the most efficient ways to enhance food safety and reduce spoilage and waste is to develop efficient, biodegradable non-toxic food packaging materials,” Philip Demokritou of Harvard Chan School, who co-led the work, said in a statement.
Tesla has signed a new deal to source nickel for battery cell production from an upcoming new mine in the United States. It’s a landmark deal to start sourcing the critical battery material in the US and help boost upcoming new mining projects.
The company gets its nickel overseas. Vale, the Brazilian mining giant, is Tesla’s main nickel supplier, and the company has recently done a big deal to secure nickel supply from New Caledonia. But, North American production of nickel is limited, and Tesla is not sourcing locally.
Similar projects in Denmark have used recaptured heat from smaller structures, such as supermarkets, to supply a nearby building or two. The Facebook project scales the technology to a level not yet reached in the world by producing up to 25 MW per hour of usable heat.
“Facebook opened their new data center in Odense,” said Denmark’s Minister of Climate, Energy, and Utilities, Dan Jørgensen, on Instagram. “It’s based on renewable energy only (from their own wind farm) and feeds their surplus heat into the district heating system. Good news for the transition to green energy!”
As a nation, Denmark has set a goal to eliminate the use of coal by 2030. The heat recovery project supports Odense’s even more aggressive goal to phase out coal (which 30 percent of the city still depends on for heat) by 2023 — a modern feat for a city that just celebrated its 1,031st anniversary. Facebook’s data center is estimated to reduce Odense’s demand for coal by up to 25 percent.
Ubiquitous Energy solar energy capturing windows installed at Michigan State University.
Courtesy of Ubiquitous Energy.
A material science start-up, Ubiquitous Energy, is raising tens of millions of dollars to turn windows into surfaces that capture solar energy. The California start-up announced on Tuesday it closed a $30 million funding round, including an investment from consumer window and door manufacturing giant Andersen Corporation, bringing its total funding raised to $70 million.
After bringing in €3.2 million in funding and raking in a list of pre-orders, Podbike says it will deliver its first electric bike-car known as the Frikar later this year.
The Norwegian mobility company Podbike has attracted attention for years as its innovative and curious-looking four-wheeled electric vehicle has taken shape.
The enclosed bike-car offers better all-weather protection and improved aerodynamics compared to a typical commuter electric bicycle, though the top can be removed for summer operation if all-weather protection isn’t required.
Oil and gas giant submits plans for up to 500MW of solar and battery storage to supply renewable power to industrial customers — including its own LNG operations — in WA Pilbara region.
Oil and gas giant Woodside has kicked off the new year by firming up plans to develop a massive solar and battery project in Western Australia’s Pilbara region, to supply renewable electricity to local industrial customers, including its own Pluto LNG facility.
In a submission to the W.A. Environmental Protection Authority on Monday, the company proposed the Woodside Solar Facility to be built in 100MW phases to a total capacity of up to 500MW, ultimately comprising around 1,000,000 solar panels and including battery energy storage infrastructure of up to 400MWh.
Woodside confirmed in its proposal that the solar farm and battery would deliver solar power to customers on the Burrup Peninsula, including at the Maitland Industrial Park, and likely including the company’s own onshore Pluto gas processing plant.