BMW has taken an important step in electric vehicle technology and started tests involving completely solid-state battery cells. The company is testing these new generation batteries in the field using the BMW i7 model. The testing process is being carried out in partnership with BMW Group and US-based battery startup Solid Power.

BMW will switch to solid-state battery technology

Solid-state batteries offer higher energy density than traditional liquid electrolyte batteries. This means more range with the same weight. BMW is focusing on engineering topics such as thermal expansion, pressure control and temperature management in the current tests.

Solid-state battery technology draws attention with the use of completely solid materials instead of liquid electrolytes. This structure allows the production of lighter and more compact batteries, while also reducing production costs and increasing safety.

The batteries developed by Solid Power are based on sulfur-based solid electrolytes. This system eliminates the risk of short circuits between the anode and cathode and also undertakes the task of ion transmission. The design, which eliminates liquid electrolytes and polymer separators, both increases safety and reduces environmental impact.

The collaboration between BMW and Solid Power dates back to 2016. It is known that the company is actively working in the battery field with more than 300 partners, from universities to entrepreneurs. The technology developed could have an impact on the electric vehicle sector, especially in terms of safety, cost and sustainability.

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