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.
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.
“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.
The claims and design-around possibilities of Samsung SDI and Sejong University’s argyrodite-type sulfide solid electrolyte patent, US11955601B2.
Fast charging comes up almost as often as driving range in an EV purchase decision, but what actually caps charging speed is not the charger.
CATL has signaled solid-state pilot production for 2027. This piece explains, from an IP perspective, the phase in which its 39.9% first-half global market share converts into patent negotiating leverage.
In the fight over the foundational patents for LFP (lithium iron phosphate) batteries, what matters more than “there was a patent” is “how the patent collapsed in China.”
Oxide-based solid electrolytes are stable and easy to handle, but solid-solid contact creates interfacial resistance. Here’s how KR20130136150A and a 2026 Chery Automobile filing each try to solve it.
CATL’s Naxtra sodium-ion battery is shaking up the low-cost segment. Here’s how the patent landscape splits between layered-oxide cathodes that reuse lithium-ion tech and low-cost Prussian-blue alternatives.