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Testo: <blockquote data-quote="marco" data-source="post: 531567" data-attributes="member: 1">[URL unfurl="true"]https://www.nytimes.com/2025/05/09/business/mercedes-factorial-solid-state-battery.html[/URL]But by June 2024, Factorial had managed to produce enough high-quality cells to announce that it had begun delivering them to Mercedes. In November, the factory in South Korea hit 85 percent yield, the best result yet. Ms. Huang and the Korean team celebrated by going out to a barbecue joint.Mercedes still had to figure out how to package the cells in a way that would protect them from highway dirt and moisture. And it had to integrate the battery pack into a vehicle, connecting it to the car’s control systems.The Factorial cells had one big drawback that made them hard to install in a car. They expanded when charged and shrank when discharged. In Mr. Keller’s words, they “breathed.”Mr. Keller turned to engineers on the Mercedes Formula 1 racing team, who are accustomed to quickly solving technical problems. They devised a mechanism that expanded and shrank with the cells, maintaining constant pressure.By Christmas 2024, a team working at Mercedes’s main research center in Sindelfingen, outside Stuttgart, texted Mr. Keller those two words: “spinning wheels.”</blockquote>

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