This article organizes the China-led launch of the international all-solid-state battery standard in August 2026, along with the mass-production roadmaps of CATL, Toyota-Idemitsu, and Samsung SDI — including key patents and points to watch for design-arounds.
Patent competition over cell-to-pack (CTP: a structure that places cells directly into the pack without bundling them into modules) is not a fight over the fact that “the module was removed,” but over claiming “what replaced the structural support, fixing, and thermal management functions the module used to perform, and how.”
This article breaks down the claims of Samsung SDI’s argyrodite-type sulfide-based solid electrolyte patent US11955601B2, and examines the room for design-arounds by comparing it with adjacent patents such as POSCO JK Solid Solution’s.
This article analyzes, from a patent portfolio perspective, ‘SolidStack,’ the pouch-type all-solid-state battery for Physical AI that Samsung SDI unveiled at InterBattery 2026.
Starting with the disclosure of BYD’s cathode composite-structure patent (publication number CN122474592A) by the China National Intellectual Property Administration (CNIPA) on July 28, 2026, BYD disclosed a total of six related patents in succession over a period of just over ten days, through August 6.
In the secondary-battery industry, all-solid-state batteries (a next-generation battery that uses a solid-state electrolyte instead of a liquid one to raise both safety and energy density) have, over the past several years, been a technology whose commercialization timing kept slipping further back, always under the label of a “dream battery.”
“Thermal runaway propagation,” in which thermal runaway (a state where exothermic reactions inside a cell accelerate themselves and spread out of control) starting in one cell spreads to adjacent cells, is a key variable governing the stability of the entire battery pack.
Any team developing lithium-ion battery cells with a silicon-based anode has likely run into a particular wall at some point.
Pre-lithiation compensates for the silicon anode’s initial capacity loss. The foundational SLMP patent is set to expire in November 2026, but process-condition patents remain in force until 2038.
The claims and design-around possibilities of Samsung SDI and Sejong University’s argyrodite-type sulfide solid electrolyte patent, US11955601B2.