Grid-Scale BESS Modeling Patent Snapshot 2026
Grid-scale battery energy storage system modeling is in a growth phase, with Vehicle Energy Japan dominating a relatively fragmented field and China leading in filing volume. Activity has expanded sharply over the multi-year window, with power-supply and grid-systems modeling as the clear technical core.
Vehicle Energy Japan leads a fragmented, early-stage field
Vehicle Energy. Japan Inc holds the top position in the applicant ranking with 8 patent records — four times the next tier — in a corpus of 36 patent families. The remaining ranked filers each hold 2 or fewer patent records, confirming that no second incumbent has yet consolidated a significant position.
The top five filers together account for 28% of the combined total among the ranked applicants visible in this query, a relatively low concentration ratio that signals an open competitive field where new entrants can still claim meaningful share. China-based filings lead jurisdictionally, and Chinese institutions occupy several slots in the top ten.
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 1 | Vehicle Energy Japan Inc | 8 | |
| 2 | China Electric Power Research Institute Co Ltd | 2 | |
| 3 | Honeywell International Inc | 2 | |
| 4 | State Grid Corporation of China | 2 | |
| 5 | Zhejiang University City College | 2 | |
| 6 | University of Memphis Research Foundation | 2 | |
| 7 | King Fahd University of Petroleum and Minerals | 2 | |
| 8 | China University of Petroleum (East China) | 2 | |
| 9 | Nasiya Niwaz Banu N | 1 | |
| 10 | Shandong Hi-Speed Group Co Ltd Innovation Research Institute | 1 |
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 11 | Zhejiang Xianheng Innovation Industrial Center Co Ltd | 1 | |
| 12 | Jiangsu Jingkong Intelligent Electric Co Ltd | 1 | |
| 13 | Beijing Lianzhihuineng Technology Co Ltd | 1 | |
| 14 | Huainan Power Supply Co of State Grid Anhui Electric Power | 1 | |
| 15 | A Sadeesh Kumar | 1 | |
| 16 | Ravi N Bagade | 1 | |
| 17 | K Kannan | 1 | |
| 18 | National Institute of Technology Patna | 1 | |
| 19 | A Prem Kumar | 1 | |
| 20 | St Joseph’s College of Engineering | 1 |
Vehicle Energy. Japan’s lead — anchored in battery measurement (G01R), battery cell technology (H01M), and grid power supply (H02J) — reflects an integrated battery-systems approach inherited from its China, and. China Electric Power Research Institute each occupy narrower, grid-integration-oriented niches.
The most recent 18–24 months of data are subject to publication lag, so counts for 2024–2026 understate actual filing activity. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Filing activity is expanding and technically anchored in grid power systems
The annual trend chart and technology composition together reveal a field that has grown substantially since 2018, with grid power-supply and measurement standards forming the visible technical core and several adjacent branches remaining sparsely populated.
Annual filing trend
Filings were minimal in 2017, established a modest base through 2018–2020, dipped in 2021, then accelerated into a 129% growth rate over the recent window. The 2024 cohort shows the highest single-year count recorded to date; 2025 and 2026 figures are understated by publication lag and should be read as floors rather than final counts.
↗ Hover for values · click a bar to ask EurekaTechnology composition
H02J (power supply and grid systems) is the visible IPC class, reflecting the core grid-integration objective of BESS modeling work. G01R (electric and magnetic measurement) and H01M (batteries and fuel cells) form a strong secondary cluster, together covering the measurement and cell-physics layers of modeling. G06F (digital data processing) and G06N (AI-based computing) are present but comparatively thin, indicating that data-driven and AI-enhanced modeling methods remain early-stage in this corpus.
↗ Hover for values · click a bar to ask EurekaHighly cited patent families surfaced by the query
Citation-heavy patent families returned by the query. Use this section as citation context, not as a curated list of the most topic-specific patents.
Physics-informed state of health for grid applicat…
In an approach to a state of health for grid applications, a system includes one or more battery energy storage systems having a plurality of batteries; energy sources; power distribution systems; and computing devices. The computing devices are configured to: for each of the battery energy storage systems: receive battery parameters for each of the… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Battery Energy Storage System, Battery Management … | 32 |
| 2 | Battery management apparatus, battery management m… | 17 |
| 3 | 一种多时间尺度动态仿真中电池储能系统模型的构建方法 | 11 |
| 4 | 一种锂离子电池储能系统集总参数的等效电路参数辨识方法 | 9 |
| 5 | 基于单粒子物理模型的光伏/锂电池混合系统能量控制策略 | 7 |
| 6 | 一种耦合网络模型锂离子电池储能系统火蔓延建模方法 | 6 |
| 7 | Adaptive demand response method using batteries wi… | 6 |
| 8 | 一种电池储能系统运行控制方法、装置、设备和介质 | 5 |
Ranked by total forward citations. Citation counts favour older and broadly cited patent families, and broad or adjacent patents may appear when they match the search scope. Treat this section as citation context, not as a curated list of the most topic-specific patents. Some patent titles may be shown in their original, non-English language where an accurate translation could not be guaranteed.
What the competitive structure means for R&D investment
China-led jurisdictional footprint shapes where incumbents are exposed and where new R&D can gain traction quickly.
Growth stage with rising annual volume
The field is classified as Growth: annual filings are still rising and the 129% recent-window expansion confirms the upward trajectory. The 2024 peak year represents the highest recorded annual cohort, and publication lag means 2025–2026 filings will revise upward. Teams entering now face an open landscape rather than an entrenched incumbent structure.
Growth · 129% recent windowLow concentration leaves room for challengers
The top five filers hold only 28% of the combined total among the ranked applicants visible in this query, and the gap between rank-one (Vehicle Energy Japan at 8 patent records) and every other filer is wide. This structure means a focused filing campaign of even modest scale can move a new entrant into the top tier. No single institution is visible in the grid-integration or AI-modeling sub-branches.
Low concentrationState Grid and China Electric Power Research Institute are the only documented co-filers
The sole recorded co-applicant pair is State Grid Corporation of China and China Electric Power Research Institute Co Ltd, which have jointly filed 2 patent records. This is the only verified collaboration link in the corpus, suggesting that cross-institution partnering remains rare in this field and that most IP is being built independently. Teams seeking ecosystem entry points may find the State Grid–CEPRI axis the most accessible Chinese collaboration node.
Limited collaborationChina and the US lead; Europe and India are secondary
China leads with 16 patent records and the US follows with 15, making the two the primary battlegrounds for BESS modeling IP. Europe (EPO) and India each account for 4 patent records, while WIPO PCT filings stand at 1 — indicating limited use of the PCT route for global protection. Teams targeting international deployment should assess whether their portfolios are adequately protected outside the China–US axis.
China & US visibleGo beyond the landscape: Eureka’s TRIZ Solution agent breaks down an R&D problem and returns patented concept solutions, each with a technical approach and cited patent & literature evidence.
| Applicant | Collaborator | Co-filings |
|---|---|---|
| State Grid Corporation of China | China Electric Power Research Institute Co Ltd | 2 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
Assignee snapshot from the current evidence set
The applicants below are visible in this query result. Because the evidence set is relatively small, read this section as a directional snapshot rather than a full competitive ranking.
Vehicle Energy Japan Inc
Vehicle Energy Japan Inc holds 8 patent records, the highest count in the corpus, concentrated across battery measurement (G01R 31), battery cell technology (H01M 10), and grid power supply (H02J 7). This tri-branch coverage reflects a full-stack battery-systems modeling approach. The company is the successor entity to Hitachi Vehicle Energy and carries a portfolio built over multiple filing cycles rather than a single recent surge.
8 patent recordsHoneywell International Inc
Honeywell International holds 2 patent records and is flagged as a new entrant in the recent filing window, focused on G01R 31 (electric measurement) and H01M 10 (battery cells). Its entry signals that established industrial automation and controls players are beginning to formalize BESS modeling IP, adding a commercially oriented industrial incumbent to a field previously dominated by energy-sector and academic filers.
2 patent recordsFrequently asked questions
The corpus covers 36 patent families. This is a relatively small and early-stage field, which means the visible assignee structure is not yet locked in and new entrants can still influence rankings with a focused filing effort.
Vehicle Energy Japan Inc leads with 8 patent records, which is four times the count of any other single filer. Its portfolio spans battery measurement (G01R 31), battery cell modeling (H01M 10), and grid power supply (H02J 7).
China and the United States are the two primary jurisdictions, with 16 and 15 patent records respectively. Europe (EPO) and India each account for 4 patent records. The PCT route is used minimally, with only 1 WIPO filing recorded.
The field is classified as Growth. Annual filings are still rising and the recent-window growth rate stands at 129%. The 2024 cohort is the highest single-year count to date; 2025 and 2026 figures understate actual activity due to publication lag.
The only recorded co-applicant pair is State Grid Corporation of China and China Electric Power Research Institute Co Ltd, which have jointly filed 2 patent records. Cross-institution collaboration is otherwise absent from the corpus, meaning most IP is developed independently.
G06N (AI-based computing) has 5 patent records, and G05B (control and regulating systems), G06Q (business and commerce data processing), and G05F (electric variable control) each have 3 or fewer. Given that the visible modeling work sits in H02J and G01R, AI-driven state estimation and closed-loop control architectures represent plausible adjacent areas with limited current IP coverage.
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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.
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