Cryogenic energy storage (CES) — most commonly realized as Liquid Air Energy Storage (LAES) — converts surplus electrical energy into cryogenic liquids (principally liquid air or liquid nitrogen), stores them in insulated tanks, and recovers electricity on demand by expanding the cryogen through turbines. The technology is gaining strategic importance as grid operators seek long-duration, location-flexible storage alternatives to lithium-ion batteries.

The foundational mechanism was established in the earliest CES patent in this dataset — filed by Highview Enterprises Limited in 2009 — which discloses producing a cryogen from a gaseous input, storing it, expanding it through a turbine, and critically, recovering cold energy from the expansion process. This cold recovery step is the key differentiator that separates high-efficiency CES from simple compressed-gas storage.

According to the International Energy Agency, long-duration energy storage is increasingly critical for decarbonising electricity grids with high shares of variable renewables. CES is well-positioned to serve this need given its bulk storage capability and absence of chemical degradation over cycles. The PatSnap chemicals and advanced materials intelligence platform provides further context on thermodynamic materials used in cryogenic systems.

A second major technical axis in the dataset is thermal energy management during compression and expansion cycles. The 2024 Highview patent discloses a multi-stage compression architecture with differentiated high-grade and low-grade heat streams routed to dedicated thermal energy storage devices, recovering compression heat that would otherwise be wasted — a significant efficiency advance over the 2009 foundation patent.

The primary application domain for CES in this dataset is utility-scale bulk energy storage for grid balancing, arbitrage, and renewable integration. Highview's patents explicitly describe the technology as a mechanism for storing surplus renewable generation and releasing it as dispatchable electricity. The EP filing (2014) positions liquid air as "energy dense compared to" compressed gas — an implicit competitive argument for grid deployment.

A differentiated application appearing in the 2018 Highview patent is co-location with industrial processes: the cold energy recovered during LAES discharge can provide commercial-grade refrigeration or enhance LNG liquefaction efficiency at adjacent industrial facilities. This positions CES as a dual-revenue asset — power storage plus industrial cold supply — improving project economics. The PatSnap life sciences platform similarly tracks cold-chain and biopharmaceutical storage innovation where CES adjacencies may emerge.

The adjacent CAES/thermal storage approach in the 2020 Greek patent targets energy autonomy for distributed or islanded communities, using wind and solar directly to drive compression storage — a smaller-scale application domain where full LAES infrastructure may not be economical. According to IRENA, island and off-grid energy storage represents a rapidly growing deployment segment globally.

The filing of both a Highview KR patent (2024) and an Energy Dome JP patent (2023) within the same two-year window indicates that both leading CES innovators are simultaneously targeting Asian grid markets — a convergence signal for near-term commercial deployment activity in South Korea and Japan. IEA data confirms both markets are actively procuring grid-scale long-duration storage. Explore the full competitive picture via PatSnap customer case studies in the energy sector.