Is Li-ion Battery Safety an Oxymoron?
I’m going to deviate from the series I began with my last post to address the timely topic of battery safety. I’ll return to why it’s taking so long to build a better battery next week. Last week Consumer Reports published an online article about Samsung Note 7 smartphones catching fire while charging. Over the Labor Day weekend, major media, including The Wall Street Journal, reported that “Samsung Electronics is
Frost & Sullivan is a global research and consulting organization that focuses on identifying “The Next Big Things” in the industries it covers by understanding the interplay between industry convergence, mega trends, technologies and market trends. According to a Frost & Sullivan report, Implications of Mega Trends on Batteries, “Rapid advances in wearable devices and the Internet of Things (IoT) are being mirrored by breakthrough innovations in battery technologies.” The
The Enovix 3D cell architecture also provides several safety features not obtainable with a conventional Li-ion battery structure (see illustration below). Safety features of Enovix 3D cell architecture (source: Enovix Corporation) The Enovix cell architecture allows for a ceramic separator that tolerates higher temperatures than the polymeric separator in a conventional Li-ion battery. Excess capacity in the Enovix patented silicon anode reduces risk for lithium metal plating during overcharge conditions.
A previous post, Li-ion Battery Disadvantages, examines how the original magnetic recording tape production paradigm for the Li-ion battery has created performance limitations and safety issues. In contrast to the “jelly roll” structure of a conventional Li-ion battery, derived from magnetic recording tape production techniques, Enovix uses 3D cell architecture (see illustration below). Cross-section of Enovix 3D cell architecture (source: Enovix Corporation) The Enovix 3D cell is inherently rectangular. This
One of my favorite PBS series (by way of BBC) is Connections, written and presented by James Burke in 1979. Connections explores an “Alternate View of Change,” the subtitle of the series. Rather than a linear path guided by logic and the scientific method, technological progress is often the result of interconnected events driven by other individual or group motivations (e.g., profit, convenience, curiosity). The series illustrates how the interplay