Vehicle-to-Grid System for Building Energy Patent Landscape
Vehicle-to-Grid System for Building Energy Patent Landscape in 2026
The V2G-for-building-energy patent space is nascent but expanding rapidly, with Toyota Motor Corporation commanding a dominant share of a still-small corpus led by H02J power-supply and grid-systems filings. Activity is highly concentrated, with the field still expanding on a multi-year basis—though annual volume has eased from its 2023 peak—leaving significant adjacent territory uncovered.
Toyota leads a tightly held, early-stage field
Toyota Motor Corporation sits at the top of the, Ltd., which holds 2 patent families. The remaining ranked applicants each hold a single family.
The top five filers collectively account for 80% of the hundred largest filers’ combined total, signalling extreme concentration for a corpus of this size. The gap between Toyota and the rest of the field is large enough that no single challenger currently threatens its position on volume alone.
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 1 | Toyota Motor Corporation | 7 | |
| 2 | Honda Motor Co., Ltd. | 2 | |
| 3 | Beijing Huashang Sanyou New Energy Technology Co., Ltd. | 1 | |
| 4 | Liikennevirta Oy (Virta Ltd.) | 1 | |
| 5 | Mailam Engineering College | 1 | |
| 6 | State Grid Corporation of China | 1 | |
| 7 | State Grid Beijing Electric Power Co. | 1 | |
| 8 | Eaton Intelligent Power Ltd. | 1 |
Toyota’s lead, combined with its recency as a new entrant, suggests the company has moved deliberately into V2G-for-building applications rather than organically accumulating filings over time. For competitors, the thin coverage means relatively few blocking positions exist today, but the pace of Toyota’s entry signals that window may close.
The most recent filing years (2024–2026) are subject to publication lag and are likely undercounted; conclusions about late-period activity should be treated as provisional. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
A 2023 filing surge defines a field still expanding on a multi-year basis
The annual filing trend and IPC technology-composition charts together reveal a field that arrived suddenly and is anchored in grid-interface IP. Both charts should be read in context of the small corpus size, which amplifies single-year swings.
Annual filing trend
Filings were essentially absent from 2017 through 2021, then jumped sharply in 2022–2023, with 2023 representing the peak year. Recent-window growth stands at 900% versus the prior three-year window, confirming the field is still expanding on a multi-year basis even though annual volume has eased from that 2023 peak. The 2024–2026 bars are understated by publication lag and should not be read as a real decline.
↗ Hover for values · click a bar to ask EurekaTechnology composition
H02J (power supply and grid systems) dominates the technology mix and is present across virtually all filings, confirming that grid-interface and energy-management logic is the primary IP battleground. B60L (electric vehicle propulsion) appears as a secondary branch, reflecting the vehicle-side charging and discharge control required for V2G operation. The remaining branches—B60W, G01C, and G08G—each carry very low coverage, marking them as sparsely filed adjacent areas.
↗ 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.
Apparatus and method for controlling energy usage …
An apparatus for controlling energy usage of charging stations is provided The apparatus enables balancing energy usage at electricity consumption sites, while considering dynamically changing charging capacity, affect to charging speeds of one or more charging stations of the electricity consumption site and combination of different types of charging… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | 汽车充电方法及系统 | 10 |
| 2 | Vehicle battery life management for energy solutions | 2 |
| 3 | Apparatus, system and method of ac and DC v2x and … | 1 |
| 4 | Server and power supply and demand balancing method | 1 |
| 5 | Server and power supply and demand balancing method | 1 |
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 shapes a distinctive risk-and-opportunity profile for new entrants and incumbents alike.
Growth stage with annual volume easing from its 2023 peak
The field is classified as Growth: the recent three-year filing window sits well above the prior three-year window (900% growth), confirming multi-year expansion. However, annual volume has eased from its 2023 peak, and the most recent years are further understated by publication lag. Entering now means competing against a small but fast-moving set of incumbents rather than a settled landscape.
Growth · past-peak annualExtreme top-tier concentration with a thin long tail
The top five filers hold 80% of the hundred largest filers’ combined total, and a single applicant—Toyota Motor Corporation with 7 patent families—accounts for the majority of that share. The long tail is extremely thin: six of the eight ranked applicants hold exactly one family each. This structure means blocking risk is currently concentrated in one assignee, and the field remains open enough for a focused entrant to establish a meaningful position.
High concentrationChinese grid and technology players co-file across a three-party cluster
State Grid Beijing Electric Power Co., State Grid Corporation of China, and Beijing Huashang Sanyou New Energy Technology each appear in one co-filing relationship with each of the other two, forming a triangular collaboration cluster. No equivalent multi-party co-filing activity is evident among the Japanese or European applicants, suggesting that Chinese ecosystem coordination is a distinct strategic posture in this space.
Co-filing clusterUnited States leads filings; Europe and China follow
The United States is the leading jurisdiction with 5 filings, followed by Europe via the EPO with 3. China, Germany, Austria, India, and WIPO (PCT) each carry 1 filing. The US and EPO concentration indicates that major players are prioritizing protection in the largest EV and building-energy markets first. The relatively thin PCT and Chinese coverage—despite Chinese applicants being active filers—points to jurisdiction strategies still being formed.
US-led coverageGo 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 Beijing Electric Power Co. | State Grid Corporation of China | 1 |
| State Grid Beijing Electric Power Co. | Beijing Huashang Sanyou New Energy Technology Co., Ltd. | 1 |
| State Grid Corporation of China | Beijing Huashang Sanyou New Energy Technology Co., Ltd. | 1 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
Toyota leads on grid-interface IP; Honda emphasises vehicle-side control
The two largest filers occupy clearly differentiated technology positions, with Toyota anchored in H02J grid-systems IP and Honda focused on the B60L/B60W vehicle powertrain and hybrid-control layer. Both entered as new entrants in the recent window.
Toyota Motor Corporation
Toyota holds 7 patent families, the largest position in the field by a wide margin. Its technology emphasis sits firmly in H02J grid-systems IP—specifically H02J 3 (grid interconnection) and H02J 9 (uninterruptible power supply architectures)—with secondary coverage in B60L 53 (EV charging interfaces). The applicant entered the space as a new entrant in the recent three-year window, meaning all 7 families are recent and the portfolio is still being built.
families: 7Honda Motor Co., Ltd.
Honda holds 2 patent families and differentiates from Toyota by focusing on B60L 58 (EV battery management), B60W 10, and B60W 50 (hybrid and joint vehicle-control systems) rather than the grid-interface layer. This vehicle-centric approach complements rather than directly overlaps Toyota’s grid-side emphasis. Like Toyota, Honda entered as a new entrant in the recent window, making its trajectory one to track as V2G-for-building deployments scale.
families: 2| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| Toyota Motor Corporation | 7 | ▲ new entrant |
| Honda Motor Co., Ltd. | 2 | ▲ new entrant |
| Eaton Intelligent Power Ltd. | 1 | ▲ new entrant |
Under-served branches at the intersection of V2G and mobility intelligence
Three IPC branches adjacent to the dominant H02J and B60L classes carry sparse coverage relative to the overall corpus. Each is an observation of relative sparsity; technical value and entry-path plausibility are noted where the evidence supports it.
B60W · Hybrid/joint vehicle control
With only 2 filings (8% share), the hybrid and joint vehicle-control branch is underrepresented relative to its logical role in V2G dispatch decisions—especially for plug-in hybrid vehicles that must balance propulsion needs against grid-service obligations. Honda is the primary filer here, leaving the sub-branch open to entrants with expertise in powertrain energy management. An entry path exists for automotive Tier 1 suppliers or software-defined-vehicle platforms integrating building-energy APIs.
Search this in Eureka →G08G · Traffic control systems
Only 1 filing (4% share) touches G08G, the traffic-control and fleet-coordination branch. For V2G-for-building use cases such as managed EV fleets serving a commercial facility, traffic and mobility scheduling logic is a natural extension of grid-dispatch algorithms. The branch is sparse enough that it should be treated as an observation of low current activity rather than a validated opportunity, but it may attract attention as fleet V2G deployments mature.
Search this in Eureka →How leading applicants diverge across technology routes
Strength of each leader across the main technology routes.
| Player | H02J 3 · Power supply & grid systems | B60L 53 · Electric vehicle propulsion | H02J 7 · Power supply & grid systems | H02J 9 · Power supply & grid systems | B60L 58 · Electric vehicle propulsion |
|---|---|---|---|---|---|
| Toyota Motor Corporation | Strong · 7 | Moderate · 2 | Absent | Strong · 4 | Absent |
| Honda Motor Co., Ltd. | Absent | Absent | Strong · 2 | Absent | Strong · 2 |
| Liikennevirta Oy (Virta Ltd.) | Strong · 1 | Strong · 1 | Absent | Absent | Strong · 1 |
| Beijing Huashang Sanyou New Energy Technology Co., Ltd. | Strong · 1 | Strong · 1 | Strong · 1 | Absent | Absent |
| State Grid Corporation of China | Strong · 1 | Strong · 1 | Strong · 1 | Absent | Absent |
| State Grid Beijing Electric Power Co. | Strong · 1 | Strong · 1 | Strong · 1 | Absent | Absent |
| Eaton Intelligent Power Ltd. | Strong · 1 | Strong · 1 | Absent | Absent | Absent |
Frequently asked questions
The corpus in scope contains 13 patent families. This is a nascent field; the small corpus size means individual filings have an outsized effect on apparent trends and concentration metrics.
Toyota Motor Corporation leads with 7 patent families, more than three times the next-ranked filer. Toyota entered the space as a new entrant in the recent three-year window, so its entire portfolio is recent.
H02J (power supply and grid systems) is present across all 13 patent families in scope, making it the dominant IPC branch. B60L (electric vehicle propulsion) is the secondary branch, reflecting the vehicle-side charging and discharge interface.
The United States leads with 5 filings, followed by Europe via the EPO with 3. China, Germany, Austria, India, and WIPO (PCT) each carry 1 filing, indicating that protection strategies are still forming outside the primary US and European markets.
Yes. State Grid Beijing Electric Power Co., State Grid Corporation of China, and Beijing Huashang Sanyou New Energy Technology form a triangular co-filing cluster, with each pair sharing one collaborative filing. No equivalent co-filing activity is evident among the Japanese or European applicants.
The field is in a Growth stage. The recent three-year filing window is 900% above the prior three-year window, confirming multi-year expansion. Annual volume has eased from its 2023 peak, and the 2024–2026 figures are further understated by publication lag, so the apparent recent softness should not be interpreted as a real decline.
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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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