Posts By: Christian Ruoff

LORD Corporation builds on its work potting electric motors, reducing hot spots by up to 40%

In 2013, Shafigh Nategh completed his doctoral thesis on the thermal management of high-performance electrical machines at the KTH Royal Institute of Technology in Stockholm, Sweden, and by 2014, the results of his doctoral work had begun to pique the interest of some heavy hitters in the electric motor industry. For his thesis, Nategh designed… Read more »

BMW electrifies its best-selling model: the 330e iPerformance PHEV launches in the US

Which major automaker has sold the highest percentage of plug-in vehicles relative to its overall US sales? You may be surprised to learn that it’s BMW – aside from Tesla, of course, which sells 100% EVs. In the first half of 2016, BMW’s four plug-in vehicles – the i3, i8, X5 xDrive40e and 330e iPerformance… Read more »

The inevitability of electric buses

Electric transit buses enter the fast-follower market stage as the leaders work to remove the last barriers to adoption. Q&A with Proterra’s Ryan Popple and ABB’s Daan Nap on the state of the market and charging standards in North America and Europe. With each passing year, more decision makers are realizing that city buses are an… Read more »

Researchers use nanolithia to improve efficiency and longevity of lithium-air batteries

Lithium-air, or lithium-oxygen, has been touted as the ultimate battery technology, because its theoretical energy density is ten times that of current lithium-ion solutions. However, scientists have struggled to overcome major challenges with the technology. The batteries waste a lot of energy as heat, degrade relatively quickly, and often require extra components to pump oxygen… Read more »

Improving aerodynamic modeling: Combining airflow dynamics with vehicle-handling models

Tuning a vehicle’s aerodynamic features is nothing new. Engineers have been using wind tunnels for decades, and more recently they’ve also employed computational fluid dynamics (CFD) software to reduce drag, minimize noise and increase stability by preventing undesired lift forces. In the expanding world of EVs, car builders are doubling down on efforts to push… Read more »

A closer look at wire bonding

Wire bonding technology – widely utilized in the microelectronics and power electronics industries since the 1970s – is finding its way into interesting new applications in the growing EV industry – in particular, battery connections. We’re quite certain that a few EVs are using wire-bonding technology for production battery pack connections, but Charged was unable… Read more »

Electric torque vectoring: Q&A with GKN’s Advanced Engineering Director (Full Interview)

Torque vectoring technology is generally defined as a vehicle’s ability to vary the power to each wheel. Quickly controlling the torque applied to the wheels independently of one another allows the driving characteristics of a vehicle to be improved in significant ways – more stability, more responsiveness and more agility. A conventional differential distributes the… Read more »

Electric torque vectoring: A motor for each wheel or a single-motor-clutch system?

In February, engineering firm GKN Automotive announced a new torque-vectoring option for electric drive called eTwinster. Torque vectoring technology is generally defined as a vehicle’s ability to vary the power to each wheel. To quickly control the torque applied to the wheels independent of one another – increasing stability, responsiveness and agility – GKN’s new… Read more »

A closer look at electrolytes in advanced batteries

The electrolytes in advanced batteries are based on incredibly complicated formulations. If you calculated all of the possible combinations of solvents, salts and additives while trying to find the optimal ratios for just one electrolyte formulation, it would add up to an extraordinary number of possibilities. Because it plays such a critical role in battery… Read more »