Energy Storage Patent Application Trends 2025

Energy Storage Patent Application Filing Activity

Energy Storage patent applications in 2025

Top Technology Areas in Energy Storage

Top CPC Codes

F17C2221/012 (Hydrogen)
- Count: 18 patents
- Example: 20250116374. PRESSURE VESSEL FOR HIGH-PRESSURE HYDROGEN GAS (JFE STEEL CORPORATION)
C01P2004/03 (obtained by SEM)
- Count: 11 patents
- Example: 20250132103. SYSTEM AND METHOD FOR PREPARING SUPERCAPACITORS UTILIZING THREE-DIMENSIONAL HIERARCHICAL POROUS NITROGEN-DOPED REDUCED GRAPHENE-OXIDE (KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY)
C01P2006/40 (INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS)
- Count: 11 patents
- Example: 20250132103. SYSTEM AND METHOD FOR PREPARING SUPERCAPACITORS UTILIZING THREE-DIMENSIONAL HIERARCHICAL POROUS NITROGEN-DOPED REDUCED GRAPHENE-OXIDE (KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY)
H01M8/04029 (PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY)
- Count: 10 patents
- Example: 20250023067. OXYGEN-FED FUEL CELL SYSTEM AND METHOD OF USING SAME (pH Matter)
F01K3/02 (STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES (gas-turbine or jet-propulsion plants)
- Count: 9 patents
- Example: 20250116211. PUMPED HEAT ENERGY STORAGE SYSTEM INTEGRATED WITH COAL-FIRED ENERGY GENERATION UNIT (MALTA INC.)
H01M8/188 (PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY)
- Count: 9 patents
- Example: 20250118786. LONG-LIVED REDOX-ACTIVE MOLECULES WITH LOW REDOX POTENTIAL (President and Fellows of Harvard College)
F28D20/00 (Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups)
- Count: 9 patents
- Example: 20250048497. Chromium Electrodes to Deliver Electric Power to Oxide Brick Circuits (Electrified Thermal Solutions, Inc.)
C01P2002/82 (by IR- or Raman-data)
- Count: 9 patents
- Example: 20250132103. SYSTEM AND METHOD FOR PREPARING SUPERCAPACITORS UTILIZING THREE-DIMENSIONAL HIERARCHICAL POROUS NITROGEN-DOPED REDUCED GRAPHENE-OXIDE (KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY)
H02J3/00 (Circuit arrangements for ac mains or ac distribution networks)
- Count: 9 patents
- Example: 20250077729. Electrical-thermal-hydrogen Multi-Energy Device Planning Method for Zero Energy Buildings (SOUTHEAST UNIVERSITY)
F01K13/02 (STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES (gas-turbine or jet-propulsion plants)
- Count: 9 patents
- Example: 20250092800. THERMAL ENERGY STORAGE SYSTEMS FOR USE IN MATERIAL PROCESSING (Rondo Energy, Inc.)

Top Companies in Energy Storage 2025

File:Top Companies in Energy Storage.png

Rondo Energy, Inc.

Number of Energy Storage patents: 9
Top CPC codes:
- F01K3/02 (STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES (gas-turbine or jet-propulsion plants): 8 patents
- B63H11/00 (Marine propulsion by water jets): 8 patents
- F01K3/08 (STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES (gas-turbine or jet-propulsion plants): 8 patents
Recent patents:

INTEGRATED GRAPHENE HOLDING LIMITED

Number of Energy Storage patents: 7
Top CPC codes:
- C01B32/05 (Preparation or purification of carbon not covered by groups): 7 patents
- B23K26/361 (Removing material (): 7 patents
- C01B32/18 (Nanoonions; Nanoscrolls; Nanohorns; Nanocones; Nanowalls): 7 patents
Recent patents:

Electrified Thermal Solutions, Inc.

Number of Energy Storage patents: 5
Top CPC codes:
- F28D20/0056 (Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups): 3 patents
- F28D2020/006 (HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT (fluid heaters having heat generating means and heat transferring means): 1 patents
- F28F2255/06 (DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water and air traps, air venting): 1 patents
Recent patents:

UT-Battelle, LLC

Number of Energy Storage patents: 4
Top CPC codes:
- C09K5/063 (MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE): 2 patents
- F28D20/02 (HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT (fluid heaters having heat generating means and heat transferring means): 1 patents
- H01M10/0567 (PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY): 1 patents
Recent patents:

Contemporary Amperex Technology (Hong Kong) Limited

Number of Energy Storage patents: 3
Top CPC codes:
- B60L50/64 (Constructional details of batteries specially adapted for electric vehicles): 2 patents
- H01M2220/20 (PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY): 2 patents
- H01M10/0431 (PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY): 1 patents
Recent patents:

MALTA INC.

Number of Energy Storage patents: 2
Top CPC codes:
- F01K3/06 (STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES (gas-turbine or jet-propulsion plants): 2 patents
- F02C1/10 (GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS (construction of turbines): 2 patents
- F01K3/02 (STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES (gas-turbine or jet-propulsion plants): 1 patents
Recent patents:
- 20250116211. PUMPED HEAT ENERGY STORAGE SYSTEM INTEGRATED WITH COAL-FIRED ENERGY GENERATION UNIT (MALTA INC.) (20250410)
- 20250084773. DUAL-POWERTRAIN PUMPED HEAT ENERGY STORAGE WITH INVENTORY CONTROL AND PURGE (MALTA INC.) (20250313)

CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED

Number of Energy Storage patents: 2
Top CPC codes:
- H01M4/5825 (PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY): 1 patents
- H01M4/366 (PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY): 1 patents
- H01M4/583 (PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY): 1 patents
Recent patents:
- 20250070168. BATTERY CELL, BATTERY, AND ELECTRICAL DEVICE (CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED) (20250227)
- 20250105424. BATTERY MODULE, BATTERY, AND ELECTRICAL DEVICE (CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED) (20250327)

MILWAUKEE ELECTRIC TOOL CORPORATION

Number of Energy Storage patents: 2
Top CPC codes:
- H02J7/342 (Parallel operation in networks using both storage and other dc sources, e.g. providing buffering (): 2 patents
- B60L53/80 (Exchanging energy storage elements, e.g. removable batteries): 1 patents
- F02N11/12 (STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR): 1 patents
Recent patents:
- 20250128639. VEHICLE BATTERY JUMP STARTER POWERED BY A REMOVABLE AND RECHARGEABLE BATTERY PACK (MILWAUKEE ELECTRIC TOOL CORPORATION) (20250424)
- 20250132595. VEHICLE BATTERY JUMP STARTER POWERED BY A REMOVABLE AND RECHARGEABLE BATTERY PACK (MILWAUKEE ELECTRIC TOOL CORPORATION) (20250424)

Harbin Institute of Technology

Number of Energy Storage patents: 2
Top CPC codes:
- C02F3/286 ({including two or more steps}): 1 patents
- C02F2203/002 (Apparatus and plants for the biological treatment of water, waste water or sewage): 1 patents
- C02F2303/10 (TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE (separation in general): 1 patents
Recent patents:
- 20250136485. HIGH-LOAD ORGANIC WASTEWATER DARK FERMENTATION BIOHYDROGEN PRODUCTION DEVICE AND HYDROGEN PRODUCTION METHOD (Harbin Institute of Technology) (20250501)
- 20250145920. BIOHYDROGEN PRODUCTION DEVICE OF CORN STALKS BASED ON SYNCHRONOUS SACCHARIFICATION AND FERMENTATION AND HYDROGEN PRODUCTION METHOD THEREOF (Harbin Institute of Technology) (20250508)

KAWASAKI JUKOGYO KABUSHIKI KAISHA

Number of Energy Storage patents: 2
Top CPC codes:
- F17C2203/0629 (Two walls): 2 patents
- F17C2221/012 (Hydrogen): 2 patents
- F17C3/04 (VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES (storing fluids in natural or artificial cavities or chambers in the earth): 1 patents
Recent patents:
- 20250172248. HYDROGEN STORAGE TANK FOR HYDROGEN AIRCRAFT (KAWASAKI JUKOGYO KABUSHIKI KAISHA) (20250529)
- 20250102114. LIQUID HYDROGEN STORAGE TANK (KAWASAKI JUKOGYO KABUSHIKI KAISHA) (20250327)