Solid-State Battery

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A lithium battery that replaces the liquid electrolyte with a solid one.

A solid-state battery replaces the liquid electrolyte in a conventional lithium-ion cell with a solid electrolyte — oxide, sulfide, or polymer. In theory this makes the cell less prone to catching fire, and it pairs more easily with a lithium-metal anode to raise energy density. Humanoid robots are tight on both space and weight, and battery life is typically just a few hours, so a battery that packs more energy per kilogram and is safer is seen as one way to extend runtime. Full solid-state batteries are still working toward mass production; what's often marketed as “semi-solid-state” still contains a small amount of liquid electrolyte, and different companies don't use the term “solid-state” the same way, so marketing claims are worth reading carefully.

Also called: All-Solid-State Battery
Related: Battery Runtime · Battery Management System (BMS) · Hot-Swappable Battery · Autonomous Battery Swapping · Humanoid Robot
Sources: Solid-state battery - Wikipedia