Reduced Risk of Thermal Runaway
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
In a previous post, Li-ion Battery Production, I reported how Sony decided to produce the initial Li-ion battery in the same manner as magnetic audio tape. This was because Sony had a surplus of magnetic tape production equipment and technicians, due to the shift in the market for recorded music from audio cassettes to compact disks. The production method helped deliver a significant initial improvement in performance over the nickel-cadmium