Brakeflow Brakeflow
When a conventional lithium-ion battery is pierced or severely damaged, a short can occur, discharging the cell in microseconds and potentially releasing a violent and often fiery chain reaction. It’s called thermal runaway and, well, it’s bad. That’s why we created BrakeFlow™, an intra-cell system that increases abuse tolerance.

It wasn’t enough to reimagine the lithium-ion battery, we’ve also introduced a whole new level of safety.
Here’s how it works:

Enovix 3D cell architecture enables multiple parallel cell-to-busbar connections

This uniquely enables BrakeFlow (shown in green) - which includes a resistor with a set value - at the busbar junction

Normal Current Flow

Under normal operation, each electrode carries a small current which results in negligible energy loss


In the event of an internal short, BrakeFlow regulates current flux from other areas of the battery to the short, thus limiting the short area from overheating and inhibiting thermal runaway

Test, test, and test again.

Many in the industry use the nail penetration test to simulate an internal short. But not all tests are equal. We used a fully charged cell at 4.35V on our 100% active silicon anode battery on an insulated table, with an impact speed of 20cm/s using a 6cm long steel rod.

enovix white paper

Technologies of the future—Artificial Intelligence, Edge computing, 5G, Electric Vehicles, Augmented Reality and Virtual Reality—all require greater battery energy density. Building and scaling a battery containing a 100% active silicon anode has long been a goal of the industry because it dramatically increases energy density and performance. Enovix is the leader in advanced silicon-anode lithium-ion battery development and production. The company's proprietary 3D cell architecture enables an increase in energy density and maintains high cycle life. Enovix is building an advanced silicon-anode lithium-ion battery production facility in the U.S. for volume production. The company's initial goal is to provide designers of category-leading mobile devices with a high-energy battery so they can create more innovative and effective portable products. Enovix is also developing its 3D cell technology and production process for the electric vehicle and energy storage markets to help enable widespread utilization of renewable energy.

Could your technology benefit from batteries with high energy density and cycle life?

Contact us at [email protected]

enovix white paper
Enovix BrakeFlow™ Technology