Archive for the ‘Batteries’ Category


It turns out that a method based on reacting to internal resistance during fast recharges should be less damaging to the battery. However, this suggests not-so-fast mid-journey recharge times.
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Commercial fast-charging stations subject electric car batteries to high temperatures and high resistance that can cause them to crack, leak, and lose their storage capacity, according to researchers at the University of California, Riverside (UCR) in a new open-access study published in the journal Energy Storage.

To remedy this, the researchers have developed a method for charging at lower temperatures with less risk of catastrophic damage and loss of storage capacity, reports Green Car Congress.

In order to make EVs more competitive with combustion engine vehicles, development of an effective fast charging technique is inevitable. However, improper employment of fast charging can damage the battery and bring safety hazards. Herein, industry based along with our proposed internal resistance (IR) based fast charging techniques were performed on commercial Panasonic NCR 18650B cylindrical batteries. To further investigate the fast charging impact and electrode degradation mechanisms, electrochemical analysis and material characterization techniques including EIS (electrochemical impedance spectroscopy), GITT (galvanostatic intermittent titration technique), SEM (scanning electron microscopy), and XRD (X-ray diffraction) were implemented.

—Sebastian et al.

Mihri Ozkan, a professor of electrical and computer engineering and Cengiz Ozkan, a professor of mechanical engineering in the Marlan and Rosemary Bourns College of Engineering, led a group that charged one set of discharged Panasonic NCR 18650B cylindrical lithium-ion batteries, found in Tesla cars, using the same industry fast-charging method as fast chargers found along freeways.

They also charged a set using a new fast-charging algorithm based on the battery’s internal resistance, which interferes with the flow of electrons. The internal resistance of a battery fluctuates according to temperature, charge state, battery age, and other factors. High internal resistance can cause problems during charging.

The UC Riverside Battery Team charging method is an adaptive system that learns from the battery by checking the battery’s internal resistance during charging. It rests when internal resistance kicks in to eliminate loss of charge capacity.

For the first 13 charging cycles, the battery storage capacities for both charging techniques remained similar. After that, however, the industry fast-charging technique caused capacity to fade much faster—after 40 charging cycles the batteries kept only 60% of their storage capacity.

Batteries charged using the internal resistance charging method retained more than 80% capacity after the 40th cycle.

Full report here.

EC Power’s All-Climate Battery


This type of battery, adopted by BMW among others, will be used in runabout vehicles at the next Winter Olympics in Beijing. Its self-heating feature means it can perform well in sub-zero conditions, unlike most Li-ion batteries. One report says it’s ‘only 1.5 percent heavier and costs 0.04 percent more than a conventional lithium-ion battery’.

A lithium-ion battery that is safe, has high power and can last for 1 million miles has been developed by a team in Penn State’s Battery and Energy Storage Technology (BEST) Center, reports TechXplore.

Electric vehicle batteries typically require a tradeoff between safety and energy density. If the battery has high energy and power density, which is required for uphill driving or merging on the freeway, then there is a chance the battery can catch fire or explode in the wrong conditions.

But materials that have low energy/power density, and therefore high safety, tend to have poor performance. There is no material that satisfies both. For that reason, battery engineers opt for performance over safety.

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Follow that termite!

Posted: February 25, 2020 by oldbrew in Batteries, Carbon cycle, Emissions, research
Tags: , ,

Termite mound in Australia [image credit: Wikipedia]


So termites could lead us to the solution to…
CO2-generating termites? The wizardry of would-be planet savers – or could it be the sharpness of opportunists? – never ceases to amaze.

Hidden metal deposits needed to transition the world to low emission technologies can be discovered using metallic blue crusts in soils and on termite mounds as signposts, according to new research from Australia’s national science agency, CSIRO.

CSIRO’s study in the southern Pilbara region of WA used new advances in sample analysis to show how metallic blue crusts, known as manganese crusts, display unique zinc signatures that indicate the presence of other base metals in the surrounding area, reports Technology.org.

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Typical electric car set-up


Expensive energy-intensive processes are needed to make a key battery ingredient for electric vehicles. How does this make any sense at all? They talk about the factories needed ‘to meet homegrown demand’ – but where is it?

As Europe looks to declare its tech independence by becoming a leader in next-generation batteries, it will have to start by making its own graphite, says TechXplore.

The problem is, nearly all of it now comes from Asia, mainly China.

So France’s Carbone Savoie and Germany’s SGL Carbon, the only European firms deemed capable of taking up the challenge, have been corralled into an ambitious battery alliance launched by Brussels last year.

“Thank you for bringing us on board this ‘Airbus for batteries,’ though to be honest, we weren’t even on the passenger list,” Carbone Savoie’s chairman Bruno Gastinne told France’s deputy finance minister Agnes Pannier-Runacher on Thursday.

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Image Credit: freepik.com

Electrek reports:

IONITY, a European EV charging network owned by BMW, Daimler, Ford, Hyundai, Kia, and VW Group (with Audi and Porsche) has announced that prices will be going up over 500% starting January 31 as they transition to a pay-per-kWh system.

Previously, IONITY charged a flat, fixed rate of €8 for a DCFC charging session. This was a good deal if you showed up with an empty battery and filled most of the way. If you arrived with, say, 10% battery remaining, and added 60 kWh during your charging session, then you’d get away with paying about €0.13 per kWh. For context, in France, electricity costs about €0.19 per kWh at home, and €0.24 per kWh at Tesla Superchargers. In Germany, you pay €0.30 per kWh at home, and €0.33 at Tesla Superchargers in Germany.

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Salar de Atacama, Chile [image credit: Francesco Mocellin @ Wikipedia]


Wikipedia says: ‘Salar de Atacama is the world’s largest and purest active source of lithium, containing 27% of the world’s lithium reserve base…Extraction of lithium-rich brines is causing conflict with water use by local communities and is damaging the ecosystem, including the Andean flamingo.’ Do self-styled planet savers approve of this?

Global demand for lithium is expected to triple in six years.

But mining companies are increasingly coming into conflict with indigenous communities who are worried about the future of their ecosystems, says DW.com.

In the middle of the world’s driest desert is a vast expanse of turquoise basins, each one like a colossal swimming pool, up to 20 times the size of a football field.

The pools are filled with a salty brine pumped up from ancient reservoirs under the desert. It also contains lithium carbonate, the raw material for a light, silvery metal that happens to be a component of the batteries now used by virtually all computers, phones and electric cars.

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Typical electric car set-up


Welcome to the EU’s plan to strong-arm its way to victory in the electric car game, in the name of imaginary climate benefits. What happens if the manufacturers all start posting heavy losses due to poor EV sales, as a result of this coercion, is not yet clear. As the article says, tens of billions of euros are at stake.

Long-awaited light-duty vehicle emission rules will hit light-duty vehicle makers working in EU member countries on January 1, and automakers will soon have to deal with the consequences, says OilPrice.com.

Vehicle manufacturers will have to sell many more hybrid and electric vehicles or pay costly fines, a situation similar to China’s rules.

For automakers with product lineups with few EV offerings, they’ll need to sell lots of conventional cars and trucks, and use the profits to pay the fines.

Industry analysts expect plug-in hybrid, battery electric vehicle, and hybrid vehicle sales to soar in the near future.

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Experimental Aluminium-Air power cell

The military developed and used ALuminium-Air power cell tech decades ago. New discoveries and advances in electrolyte mean it might become viable for commercial and domestic use. The Daily Mail has this:

Two years ago, Jackson claims, motor manufacturers lobbied the Foreign Office to bar him from a prestigious conference for European businesses and governments at the British embassy in Paris, which was supposed to agree a blueprint for ensuring all new cars are electric by 2040. The bid to exclude him failed. Now, with the signing of the Austin deal, it seems he is finally on the road to success.

He has also secured a £108,000 grant for further research from the Advanced Propulsion Centre, a partner of the Department for Business, Innovation and Skills. His technology has been validated by two French universities.

He says: ‘It has been a tough battle but I’m finally making progress. From every logical standpoint, this is the way to go.’

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