Mercedes EQS with Solid-State Battery

2025 03/09

Mercedes-Benz has begun road tests of its first prototype equipped with a lithium-metal solid-state battery.

 

The prototype is based on the current EQS electric full-size liftback, with Mercedes targeting a range of at least 621 miles on a single charge, according to the WLTP test cycle used overseas. This represents an approximately 25% increase over the production EQS, which has a maximum WLTP range of 488 miles.

 

Solid-state batteries are a promising advancement in electric mobility. By using a solid electrolyte instead of a liquid, they enhance safety and enable the use of new anode materials, such as lithium-metal, which significantly outperforms conventional lithium-ion cells and allows for higher energy densities.

 

In the EQS prototype, the battery is approximately 25% more energy-dense than a conventional liquid-based lithium-ion battery.