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Fleets and Infrastructure Features

Battery testing start-up Novonix has spun off PUREgraphite to manufacture anode material in the US

Batteries are ubiquitous in our modern lives. Take a look around you and count how many items need be plugged in and recharged. If you’re at your desk, the answer might be four or five. If you’re out for a run, perhaps two or three. If you’re in a garage, there may only be one,… Read more »

SiC vs GaN semiconductors for EV power converters: Tech Opinion

Just as engineers are starting to get used to the advantages (and quirks) of silicon carbide (SiC ) devices, another semiconductor material joins the fray: gallium nitride, or GaN. Though there are some superficial similarities between these two materials, and even some overlap in their areas of best use, it is my opinion that only… Read more »

The Wallbox Copper proves EV chargers can be beautiful too

The Spanish charging station company Wallbox is growing quickly and winning awards. The Red Dot Product Design award is given every year to consumer products with exceptional design, from luxury watches to elegant furniture to stunning sports cars. You might not expect an EV charger to share that stage, but among the 2019 Red Dot… Read more »

Battery bonding: Ultrasonic wire bonding vs laser welded bonding

Ultrasonic wire bonding vs laser welded bonding Li-ion cells come in many different shapes and size. There’s also a large variety of options to choose from when designing the connections between each cell and a vehicle’s electronics. In automotive applications, it’s critical to design reliable connections that are cost-effective and suited to high-volume manufacturing. F&K… Read more »

A closer look at the losses in power semiconductors

A previous article examined loss mechanisms in traction motors, which tend to be the single biggest source of losses in a modern EV drivetrain. This time, the focus is on the various power semiconductors, as they are the next biggest source of losses. Also covered in brief are ways to mitigate these losses and design… Read more »

Nissan’s $3,500 LEAF rebate gets local utilities involved in increasing EV awareness

If you pay an electric bill (and who doesn’t?), keep your eyes open for a message from your local utility announcing that you can take advantage of a $3,500 rebate on a Nissan LEAF. Nissan has been partnering with various utilities around the US to offer customers a special rebate. The rebate comes from Nissan,… Read more »

Could new regulations hold back EV charging development?

While regulators and the charging industry are hashing out the details of new regulations, some are concerned that well-intentioned policies could have negative effects. The availability of EV charging infrastructure is increasing every day, and action by federal, state and local governments has been a major driver of this growth. However, like anything in life,… Read more »

The EV industry sees problems with California’s proposal to mandate credit card readers for public chargers

In California, there is a controversial plan to require credit card readers on all public charging stations, including retrofitting already installed units. California’s Electric Vehicle Charging Stations Open Access Act (Senate Bill 454, which passed in 2013) mandates open access to public charging stations – that is, a driver doesn’t have to be a member… Read more »

Determining ENERGY STAR specifications for high-power EV fast chargers proves challenging

The US EPA is proposing a new ENERGY STAR specification, Electric Vehicle Supply Equipment Version 1.1, which adds DC fast chargers to the existing specification. The process of proposing the spec and considering stakeholder comments began in early 2018, and is ongoing. The EPA is proposing to release a Version 1.1 Draft 1 Specification in… Read more »

California proposes DC metering standards for fast chargers, companies ask for more time

There is a proposal on the table in California that has to do with setting standards for energy metering on DC fast charging stations. Basically, the state is looking to enact regulations on EV charging similar to those that already exist for gasoline sales – gas pumps are regularly certified to ensure that when you… Read more »