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Seth Itow's blog

Increasing Lithium Ion Safety with Semiconductors

As the world’s devices get smaller and lighter with increasing power requirements, we need batteries that can provide more power for more time. Modern lithium ion batteries are reaching incredible energy densities enabling devices and vehicles to be more efficient than ever before. All energy storage devices have some risk, however these high energy densities come with increased danger. The dangers of lithium ion batteries have garnered national media attention with the explosions of Samsung smartphones, “hoverboards”, e-cigarettes, and other consumer electronic devices. While manufacturing error contributes to battery failure, many cases of battery explosions are the result of insufficient battery management technology built into the device.
Previous generations of portable devices and vehicles have used nickel cadmium, nickel hydride, or lead acid batteries. These chemistries are inherently less volatile than lithium chemistry packs and do not require constant monitoring. Lithium battery packs are much more finicky, requiring protection from overcharge, over-discharge, temperature, and physical shock. While all batteries can be damaged by these factors, lithium ion batteries become volatile and will overheat, catch fire, and explode.

Semiconductors are Key to Better 3D Printing

The 3D printing world is an exciting place to be right now.  For do-it-yourselfers with an artistic or engineering bent, 3D printing delivers a whole new toolbox, enabling designs that were not possible before with exciting new materials.  These DIYers will often build their own 3D printers from scratch.  The RepRap movement was formed with the goal of creating a self-replicating manufacturing machine. 

The first self-replicating 3D printer was built in 2008 by mechanical engineers at the University of Bath. Since then, the hobbyist 3D printer movement has blossomed from a grad school project to thriving hobbyist community. A 3D printer can be built from scratch using almost any building material (plywood, laser cut acrylic, machined aluminum, LEGO bricks, etc.), however all printers need at least one type of commercially manufactured hardware: electronics. 

Example of a RepRap Printer