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recently, mercedes-benz and american battery startup factorial energy announced that they will jointly develop a new solid-state battery called solstice, which is expected to reduce the weight of the battery by 40%, allowing electric vehicles to have a range of 1,000 km and an 80% increase in endurance. at the same time, this battery can remain stable even at temperatures above 90 degrees, reducing the battery pack's requirements for the cooling system and significantly improving safety performance.

in july, mercedes-benz began testing samples of solstice solid-state batteries. the startup said that this is the first solid-state battery b sample delivered to automakers. it is reported that the b sample is a modified sample based on the trial production results of the a sample. at this stage, although the functions of the sample are not yet mature, the design plan and key technologies have been determined.

earlier in 2021, mercedes-benz reached a joint development agreement with factorial and invested $200 million in 2022 to accelerate the research and development of solid-state batteries. mercedes-benz's chief technology officer said that the energy density of solid-state batteries is 40% higher than mercedes-benz's current high-end batteries, and electric vehicles can also use cheaper steel bodies, further saving manufacturing costs.