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Features

The challenges of battery state of charge measurements

Your BMS’s fuel gauge is lying to you. Here’s why that’s not a big deal. Battery management systems (BMSs), and the fuel gauges in them, are a part of daily life for almost everyone. You’ll find them in vehicles, laptops, cell phones, grid-attached energy storage – basically, anything that does work and needs to be plugged in,… Read more »

Connecting Europe’s charging networks

Many have posed the question of why the EV market in Europe has lagged behind the market in the US, considering the Continent’s higher fuel prices and strong green tradition. While there are several plausible answers, on closer examination the question itself makes little sense, because in fact there is no European EV market, but… Read more »

Multiphase cooling: CapTherm’s technology takes the heat off

Canada’s CapTherm Systems’ multiphase cooling technology could take the heat off of EV batteries and charging stations more efficiently, taking up less space using fewer materials while improving longevity and performance. Charged takes an early peek at this innovation before it goes commercial next year. If you’ve never dropped your smartphone 10 feet onto pavement,… Read more »

BMW i3: The launch of many firsts

When you’re writing about the dawn of a new industry, “firsts” and “milestones” come along so often that they may start to lose their novelty. However, the BMW i3, which was officially “launched” in July, and is scheduled to go on sale next year, boasts an impressive number of innovations that has the EV press… Read more »

Plug-in fleets: small challenges, huge savings

Four plug-in truck companies talk to fleet managers about electrification opportunities Plug-in vehicles are different. Aside from the obvious changes in technology, they present a different financial model for corporate number crunchers. This means some challenges for those pitching EVs and PHEVs to fleet operators. Fortunately for the EV industry and the fleets of the… Read more »

Resonating with the OEMs: WiTricity’s wireless energy transfer technology

WiTricity hopes to leverage a wireless energy transfer breakthrough out of MIT into a commercial solution with far-reaching potential Inside a standard electrical transformer are two coils that transfer power wirelessly. They utilize the principle of magnetic induction, sending energy from a primary coil to a secondary coil without a direct electrical connection.  Inductive chargers,… Read more »

A closer look at back electromotive force

Why motors generate and generators motor In a previous article I took a closer look at regenerative braking, and mentioned an old engineering saying that every motor is a generator and every generator is a motor (along with the caveat that some are more suited to the opposite purpose than others). This time around I’ll… Read more »

EVs made (and powered) in America

Publisher’s Note – CHARGED Electric Vehicles Magazine Issue 9 – August 2013 The Wall Street Journal recently published an article on Kentucky’s Republican congressman Thomas Massie. The piece was about a few idealists in the GOP that are bucking the party leaders and blocking their agenda. The most interesting departure from Republican talking points is… Read more »

Plug In America research: Tesla Roadster battery longevity exceeds projections

By Tom Saxton, Chief Science Officer, Plug In America Many current and prospective electric vehicle owners are curious to better understand battery pack longevity. There’s plenty of technical data on how batteries lose capacity with use, but a lot of that testing subjects the batteries to extreme and rapid charge/discharge cycles, very unlike the much gentler use… Read more »

Wildcat Discovery Technologies’ new cathode materials

We first told you about Wildcat Discovery Technologies back in the October/November 2012 issue of Charged. It is a venture-backed start-up in Southern California that has developed proprietary methods for rapidly synthesizing energy-storage materials. The company boasts that one of its busy scientists can produce 400 to 500 different battery materials at the same time… Read more »