IPC Main Group
H02J 15/00 Systems for storing electric energy specially adapted for power networks
Introduced: July 1974
Last revised: January 2026
Classification Context
- Section:
- ELECTRICITY
- Class:
- GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
- Subclass:
- ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
5 direct subcodes
Child Classifications
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- H02J 15/1 using storage of hydraulic energy
- H02J 15/2 using storage of pneumatic energy, e.g. compressed air energy storage [CAES]
- H02J 15/3 using storage of inertial or mechanical energy, e.g. using flywheels
- H02J 15/4 using coils, e.g. superconductive magnetic energy storage [SMES] systems
- H02J 15/5 using stored hydrogen
Top Applicants
Top 10 applicants by patent filingsfor class H02, 2013–2023, worldwide · Source: EPO PATSTAT
- SGCC(STATE GRID CORPORATION OF CHINA) 54,496
- MITSUBISHI ELECTRIC CORPORATION JP 10,495
- TOYOTA MOTOR CORPORATION 9,464
- GUANGDONG POWER GRID CORPORATION 9,339
- ROBERT BOSCH DE 8,226
- SIEMENS DE 8,218
- DENSO CORPORATION 7,063
- MITSUBISHI ELECTRIC CORPORATION 6,619
- SAMSUNG ELECTRONICS COMPANY KR 5,826
- GREE ELECTRIC APPLIANCES 5,094