Electric cars: the invention that finally eliminates the biggest risk of batteries

If you’re wondering what makes electric cars still “unsafe” for many, the answer is simple: lithium batteries. Despite the exponential growth in sales – in France alone, in 2022, 18% of new cars purchased were electric – the risk of fire represents a considerable obstacle. This problem arises from dendrite formationtiny metal structures that build up on the anode, can puncture the battery separator and cause a short circuit or explosion.

And that’s where it comes in Imperviousthe intelligent separator developed by 24M. This device is designed to block the formation of dendrites, constantly monitor each battery cell and, in case of anomalies, interrupt the flow of energy to prevent the dreaded thermal packaging (uncontrolled overheating). A battery with Impervio doesn’t just detect problems: it stops them in their tracks, avoiding fires and explosions.

But that’s not all: Impervio is compatible with lithium-metal and lithium-ion batteries already on the market, which means it doesn’t require a revolution in production. A solution simple, but brilliantready to guarantee safety never seen before.

The challenge of dendrites

To demonstrate the effectiveness of its technology, 24M put Impervio to the test in a series of internal comparative tests. Standard batteries and those equipped with the new separator were subjected to extreme scenarios, including intentional contamination with stainless steel and hour-long power surges.

Results? Traditional batteries couldn’t resist: they overheated, exploded and caught fire after a few minutes. The cells with Impervio, however, maintained one surprising stabilityeven in extreme situations. No explosion, no flame, no short circuit.

An interesting fact: when the developers contaminated the cells with steel or copper to simulate the formation of dendrites, Impervio “nipped” the short circuit in the budeliminating the risk. A true revolution in the lithium battery sector.

When will Impervio be available?

Series production is expected by the end of 2025, with the market launch between 2025 and 2026. Currently, 24M is working with manufacturers and licensees to bring this technology into electric cars and energy storage systems around the world.

This is not the start-up’s first innovation: Impervio follows the launch of ETOP technology, another revolutionary project in the field of batteries. However, according to experts, Impervio represents an epochal turning point for the safety of electric vehicles, allowing not only to reduce risks, but also to improve energy density and overall performance.