LG Energy Solution will supply Mercedes-Benz with a new 46100 cylindrical battery cell for the German automaker’s next-generation electric vehicles starting in 2028.
The agreement expands a series of four long-term supply contracts signed between the two companies since October 2024.
With a diameter of 46 millimetres and a height of 100 millimetres, the 46100 format is an unannounced variation within the broader 46-series family. The cylindrical format gained industry prominence after Tesla adopted the 4680 size. Other manufacturers have experimented with 4695 and 46120 designs. The 100-millimetre height fits the specific packaging requirements of Mercedes-Benz vehicle architectures.
Pilot manufacturing for the 46100 cell will take place at LG Energy Solution’s domestic facility in Ochang, South Korea. That site will calibrate machinery and refine production tolerances before equipment ships to Europe. Mass production will run at the group’s manufacturing complex in Wrocław, Poland, where line installation begins next year. The supplier is also weighing capital expenditures for dedicated module assembly lines at the Polish site to deliver complete clusters directly to vehicle assembly plants.
Automakers in Europe and Asia are rethinking their dependence on pouch and prismatic cell formats. Cylindrical cells offer superior structural stability and heat dissipation. That reduces the risk of thermal runaway in high-output drivetrains. Mercedes-Benz previously relied heavily on pouch cells from suppliers including SK On and Farasis Energy. Safety recalls and module complexity pushed the brand toward mixed procurement strategies.
LG Energy Solution has built out manufacturing capacity for varied cylindrical specifications. The company started production of 4695 cells at the Ochang plant late last year.
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