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Run your analysis now →https://www.patsnap.com/resources/blog/rd-blog/grid-scale-energy-storage-integration-patent-landscape/ · Patsnap · data cut-off 2026-07-31 · downloaded from the live page
Patent Landscape · Power Electronics & GridGrid-Scale Energy Storage Integration Patents
- Filing has plateaued, not accelerated. the midpoint year (2022) already sat at 60 filings against a 2024 peak of 73 — growth since has been flat rather than exponential.
- Power systems, not batteries, dominate the claim space. H02J grid/power-supply filings (353) outnumber H01M battery-chemistry filings (127) by nearly 3:1, so the contested ground is integration and control, not cell design.
- China and the US lead filing volume by a wide margin. 129 China filings and 116 US filings dwarf Europe (47), WIPO/PCT (42), India (31) and Australia (17) combined receiving-office activity.
415
Published Records
23%
Top-5 Share of All Records
+152%
Filing Growth 2021→2024
CN
Leading Jurisdiction
Filing growth compares 2021 (29 records) with 2024 (73) — a three-year span. 2024 is the most recent year we treat as complete: publication lags filing by roughly 18 months, so 2025 onwards are still filling in and any growth rate that ends there would understate the field. Top-5 share is the combined record count of the five largest assignees divided by all 415 records in scope (CR5), not by the ranked leaders only.
Published byPatsnap Research··7 min readSourced from Patsnap Eureka
Overview
What this landscape covers
Grid-scale energy storage integration sits at the junction of battery hardware and the power electronics that connect it to the grid: frequency regulation, peak shaving, state-of-charge management and the power conversion systems that move energy between a battery bank and a utility feeder. The dataset covers 415 patent families published between 2015 and the 2026 cut-off, filtered to records that combine grid energy storage language with these specific control functions under IPC classes H02J, H02J7 and H01M10.
Because publication lags filing by roughly 18 months, the most recent filing year in this dataset understates real activity; treat 2025 and 2026 counts as a floor, not a ceiling.
Filing activity, 2017-2026
Source: Patsnap Eureka. Assignee ranking and totals. Derived from a Patsnap search on Grid-Scale Energy Storage Integration covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
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The Numbers
Filing trends and technology composition
Two views of the same 415 families: how filing volume has moved year over year, and which IPC subclasses carry the claim density.
A decade of filings, now flattening
Annual filings rose from 6 in 2017 to a peak of 73 in 2024. The 2022 midpoint of 60 already sat close to that peak, meaning the last few years have added volume slowly rather than compounding it — this looks like a maturing filing base rather than a land grab in progress.
Power electronics outweighs battery chemistry
H02J (power supply and grid systems) accounts for 353 of the 415 records, more than double H01M (batteries, cells and fuel cells) at 127. Supporting classes — G01R measurement (38), B60L EV propulsion (30), G06Q commerce/admin (29), G06N AI-based computing (27), H02M power conversion (27) and G05F variable control (18) — show the field increasingly treats storage as a controls and software problem layered on commodity cells.
Shares are the percentage of the 415 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Source: Patsnap Eureka. Filing trend and technology composition. Derived from a Patsnap search on Grid-Scale Energy Storage Integration covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.
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The most-cited prior art and a recent representative filing
Representative recent filing
Control, management and distribution of power supplied by an electric utility and battery energy storage system
ONE THREE ENERGY, INC.
An energy management system providing logical control of the flow of energy between an electrical utility, a battery energy storage system and a load such as an electric vehicle being recharged via DC fast charging. Power is selectively delivered to the storage system (charging) or drawn from it (discharging) to a rapid DC charging station, letting the storage system increase overall output beyond the utility supply's own capacity.Filed by One Three Energy, Inc.; published 2025-09-11 as US20250286380A1.
Most-cited records in this landscape
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20050158614A1 | System and method for optimizing efficiency and power output from a vanadium redox battery energy storage sys… | 129 |
| 2 | WO2007104167A1 | Method for operating a battery energy storage system (BESS) and battery energy storage system | 117 |
| 3 | CN102916440A | 一种基于电池储能系统的功率转换系统及其控制方法 | 113 |
| 4 | US20200059098A1 | Building and Building Cluster Energy Management and Optimization System and Method | 85 |
| 5 | US20190157869A1 | Battery energy storage control systems and methods | 65 |
| 6 | US20210376614A1 | Hierarchical control method for island power grid energy storage system for increasing new energy generation … | 58 |
| 7 | EP2139090A1 | Method for operating a battery energy storage system | 50 |
| 8 | US20170170684A1 | Battery Energy Storage System Management Apparatus, Battery Energy Storage System Management Method, and Batt… | 49 |
| 9 | CN103296722A | 应用于H桥级联型电池储能系统相内SOC均衡控制方法 | 45 |
| 10 | WO2018156700A1 | Building energy management and optimization | 38 |
Citation counts favour older filings simply because they have had longer to accumulate citations inside this corpus; read them as markers of influence on the field, not as a ranking of current relevance.
Patent titles are shown in the language they were filed in, not translated, so that each record stays verifiable against the original filing — a translated title will not match in Eureka or in any national register. Each row carries its publication number; clicking a row searches Eureka by that number.
Source: Patsnap Eureka. Citation counts and representative records. Derived from a Patsnap search on Grid-Scale Energy Storage Integration covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
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What the filing pattern says about the field
Three read-throughs from the trend, IPC and citation data that matter for a filing or freedom-to-operate decision.
Filing momentum
60 → 73
2022 to 2024 filings
Growth has flattened, not stalled
The rise from 60 filings at the 2022 midpoint to a 2024 peak of 73 is modest against the earlier climb from 6 filings in 2017. This is consistent with a field where core architectures are settling and later filers are refining rather than staking new ground.
Peak year: 2024 at 73 filings
Claim concentration
353 vs 127
H02J vs H01M records
The contested layer is control, not chemistry
With H02J filings outnumbering H01M nearly 3:1, most claim activity sits in grid interconnection, power conversion and dispatch logic rather than in the battery cell itself. A freedom-to-operate review should weight power-electronics prior art heavily.
H02J: 353 records; H01M: 127 records
Geographic spread
129 + 116
China + US filings
Filing is bipolar, not global
China (129) and the United States (116) together account for well over half of receiving-office activity, with Europe, WIPO/PCT, India and Australia each in double digits. Strategies built only around EPO or PCT filings will miss most of the active docket.
EPO 47 · WIPO 42 · India 31 · Australia 17
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Co-filing is sparse and mostly domestic
| Assignee | Co-assignee | Shared families |
|---|---|---|
| Shanghai Jiao Tong University | China Southern Power Grid Peak-shaving and Frequency-regulation Power Generation Co., Ltd. | 3 |
| VRB Power Systems Inc. | HENNESSY TIMOTHY DAVID JOHN | 3 |
| State Grid Corporation of China | China Electric Power Research Institute Co., Ltd. | 3 |
| King Fahd University of Petroleum and Minerals | SAUDI DATA & ARTIFICIAL INTELLIGENCE AUTHORITY (SDAIA) | 2 |
| Shanghai Jiao Tong University | China Southern Power Grid Co., Ltd. Peak-shaving and Frequency-regulation Power Generation Company | 2 |
| State Grid Corporation of China | Northeast Electric Power University | 2 |
| State Grid Corporation of China | State Grid Qinghai Electric Power Company Economic and Technical Research Institute | 1 |
| State Grid Corporation of China | State Grid Qinghai Electric Power Company Clean Energy Development Research Institute | 1 |
Only 10 co-assignee pairs appear across the dataset, and the strongest links — Shanghai Jiao Tong University with South Grid peak/frequency generation, VRB Power Systems with an individual inventor, and State Grid Corporation with China Electric Power Research Institute — are each capped at 3 shared families. Cross-border joint filing is essentially absent.
Source: Patsnap Eureka. Co-assignee relationships and derived observations. Derived from a Patsnap search on Grid-Scale Energy Storage Integration covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
Players
Who is filing, and where the docket is thin
Recent-year momentum is muted across the assignees tracked here, and the sub-areas below carry noticeably fewer filings than the core power-conversion and dispatch claims.
Momentum leader (flat)
3 filings, 0% YoY
latest year
LG Energy Solution holds steady
LG Energy Solution logged 3 filings in the latest tracked year with 0% year-on-year change — the only assignee in the momentum data showing continued, if flat, activity rather than a drop to zero.
Latest-year filings: 3
Momentum decline
-100% YoY
latest year
Several established filers went to zero
Honeywell International and Fluence Energy both show a -100% year-on-year change, with zero filings in the latest tracked year after prior activity — a signal worth checking against their overall portfolio rather than reading as full exit.
0 filings in latest year
Academic and state-grid filers
10 co-assignee pairs
across dataset
Chinese grid operators and universities co-file domestically
State Grid Corporation, China Electric Power Research Institute, Shanghai Jiao Tong University and South Grid's peak/frequency generation unit appear repeatedly among the strongest co-assignee pairs, all capped at 3 shared families — filing here is collaborative but locally contained.
Strongest pairs: 3 shared families each
Recent-year filing momentum
| Assignee | Recent year | YoY |
|---|---|---|
| LG Energy Solution, Ltd. | 3 | 0% |
| Honeywell International Inc. | 0 | -100% |
| King Fahd University of Petroleum and Minerals | 0 | — |
| Shanghai Jiao Tong University | 0 | — |
| JD Holding Inc. | 0 | — |
| Fluence Energy, LLC | 0 | -100% |
| VRB Power Systems Inc. | 0 | — |
| ABB (Switzerland) Ltd. | 0 | — |
Source: Patsnap Eureka. Assignee-level momentum. Derived from a Patsnap search on Grid-Scale Energy Storage Integration covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
What's Next
Where to take this analysis
The trends above point to specific next steps depending on whether the goal is filing strategy, freedom-to-operate or competitive tracking.
Stress-test a draft claim against the power-electronics cluster
Given H02J's dominance over H01M in this dataset, any new filing on dispatch, conversion or grid-interconnection logic should be checked against the densest subclass first, not the battery-chemistry literature.
Run a claim check in EurekaTrack the flat-to-declining filers
Assignees showing 0% or -100% year-on-year momentum may be repositioning rather than exiting; monitoring their filings over the next publication cycle will clarify which.
Set up assignee monitoring in EurekaScope the under-claimed branches before competitors do
AI-driven state-of-charge forecasting and second-life battery integration show thinner filing density than the core dispatch claims — worth a focused prior-art search before drafting.
Explore white space in EurekaSource: Patsnap Eureka. Forward-looking reading of the same dataset. Derived from a Patsnap search on Grid-Scale Energy Storage Integration covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
FAQ
Common questions about this landscape
Filing in this dataset is spread across a mix of Chinese state-grid entities, universities and international battery makers, with no single assignee holding a commanding share of the 415 tracked families. Recent-year momentum data shows most named assignees at flat or declining filing counts, including LG Energy Solution holding steady at a small volume while others such as Honeywell International show a full year-on-year drop to zero. This suggests the field has more of a long tail than a dominant leader, and any competitive tracking should watch for new entrants rather than assume incumbents will keep filing at prior rates.
Growth has flattened rather than continued climbing. Filings rose sharply from 6 in 2017 to a 2022 midpoint of 60, but the 2024 peak of only 73 shows the growth rate slowing well before that peak. Because publication typically lags filing by about 18 months, the most recent years in the dataset will be revised upward as more records publish, but the underlying trend already looks like a maturing filing base rather than an accelerating one.
Overwhelmingly grid integration and control. H02J, the power-supply-and-grid-systems subclass, accounts for 353 of the 415 records, compared with 127 for H01M battery and cell chemistry — meaning most claims cover power conversion, dispatch logic and grid interconnection rather than the battery cell itself. Supporting subclasses like H02M (power conversion) and G05F (variable control) reinforce that the contested claim space is the electronics and software layer wrapped around commodity storage hardware.
China and the United States lead by a wide margin, with 129 and 116 receiving-office filings respectively in this dataset. Europe via the EPO (47) and international PCT filings (42) trail well behind, with India (31) and Australia (17) further back still. A filing or freedom-to-operate strategy built only around European or PCT coverage would miss the majority of the active docket, which sits in Chinese and US filings.
US20250286380A1, filed by One Three Energy, Inc. and published 2025-09-11, describes an energy management system that logically controls power flow between an electric utility, a battery energy storage system and a load such as an EV on DC fast charge. Its core mechanism is selectively charging or discharging the storage system to support a rapid DC charging station, letting the combined system deliver output beyond what the utility connection alone could supply. Anyone building DC fast-charging infrastructure that draws on a co-located battery buffer to exceed grid-supply limits should review this filing's specific control logic for overlap.
Answers are grounded in the same dataset. Derived from a Patsnap search on Grid-Scale Energy Storage Integration covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
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Disclaimer. This page is generated from Patsnap Eureka data drawn from a limited snapshot of global patent and scientific-literature records, and is provided for general information and reference only.
Patent data carries inherent limitations: recent filings (typically the most recent 18–24 months) are under-counted due to standard publication lag; counts may be reported at either a patent-family or a patent-record basis and are not always directly comparable; classification, applicant-name, and citation data may contain errors, duplicates, or omissions; and the underlying search query defines and constrains the scope shown. As a result, the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
Nothing on this page constitutes an exhaustive prior-art, novelty, freedom-to-operate, or validity search, nor does it constitute legal, financial, investment, or professional advice, and it should not be relied upon as such. Any patent, commercial, or strategic decision should be verified independently and reviewed with qualified patent, legal, and domain professionals. Patsnap makes no warranties, express or implied, as to the accuracy, completeness, or fitness for any particular purpose of the information presented.
Machine translation. Assignee and organisation names originally recorded in Chinese, Japanese or Korean have been rendered into English by an AI translation step so that the tables stay readable. These renderings are best-effort and may not match a company's registered English name; the original name is what the underlying patent record carries, and it is what any Eureka query launched from this page uses.