EV Fast Charging for Rail Transport Patent Landscape 2026
The EV fast charging for rail transport patent space is nascent but expanding, with 54 patent families in scope and a field still growing on a multi-year basis, though annual volume has eased from its 2022 peak. Zoox Inc leads with 11 patent records, and the top five filers collectively account for 45% of the hundred largest filers’ combined total, signalling a fragmented but emerging competitive structure dominated by US-based innovators.
Zoox leads a fragmented, US-centred field with no dominant incumbent entrenched across all routes
Zoox Inc holds the top position with 11 patent records, followed by ElectricFish Energy Inc with 8 and Nyobolt Ltd and StoredgeAI LLC each with 4. This ranking reflects an early-stage competitive landscape where the leader’s margin is meaningful but not insurmountable.
The top five filers’ share of the hundred largest filers’ combined total stands at 45%, indicating moderate concentration at the apex without the lock-in typical of mature sectors. A visible tier gap separates the top two from the remainder of the field, most of whom hold two or three patent records each.
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 1 | Zoox Inc | 11 | |
| 2 | ElectricFish Energy Inc | 8 | |
| 3 | Nyobolt Ltd | 4 | |
| 4 | StoredgeAI LLC | 4 | |
| 5 | Plug P2P Inc | 3 | |
| 6 | Ford Global Technologies LLC | 3 | |
| 7 | Siemens Industry Inc | 2 | |
| 8 | AWP Assistance (India) Pte Ltd | 2 | |
| 9 | Fermata Energy LLC | 2 | |
| 10 | Epyon | 2 |
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 11 | Kaptein Johannes Gerardus | 2 | |
| 12 | Fermata Energy II LLC | 2 | |
| 13 | GM Global Technology Operations LLC | 2 | |
| 14 | Atieva Inc (US) | 2 | |
| 15 | Pirl Technology Inc | 2 | |
| 16 | Robers Egbert Wouter Joghum | 2 | |
| 17 | Evgentech | 2 | |
| 18 | Tang Dershuen Allen | 1 | |
| 19 | Knopp James Arthur | 1 | |
| 20 | Allstate Insurance Company | 1 |
The leaders’ positions imply that core EV propulsion charging protocols (B60L) are being claimed first, but adjacent technology areas such as AI-driven energy management and power conversion remain thinly covered, leaving room for challengers to establish differentiated footholds.
The most recent 18–24 months of filings are likely understated due to patent publication lag; counts for 2024 and 2025 should be treated as provisional floors rather than final tallies. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Activity surged through 2022 and remains elevated; propulsion-layer patents dominate the technology mix
The filing trend and technology composition charts together show a field that accelerated sharply after 2020 and whose technical coverage is heavily concentrated in EV propulsion charging, with grid, AI, and battery management as secondary but growing branches.
Annual filing trend
Filings rose from near zero in 2017–2019 to a visible peak in 2022, then eased in 2023 before partially recovering in 2024. The three-year recent window sits 72% above the prior three-year window, confirming multi-year expansion. Figures for 2023–2025 are subject to upward revision as publications clear the typical 18-month lag.
↗ Hover for values · click a bar to ask EurekaTechnology composition
B60L (electric vehicle propulsion) is the dominant branch with 61 patent records, followed by H02J (power supply and grid systems) at 28 and G06Q (business and administrative data processing) at 15. H01M (batteries and fuel cells) and G06N (AI computing models) trail further behind, suggesting that charging protocol and grid-interface layers are claimed most intensively while battery chemistry and algorithmic intelligence remain relatively open.
↗ 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.
DC fast charger wireless-charging adapter
A wireless-charging adapter is connectable to a direct current (DC) fast charger and includes an induction coil for wireless charging a second induction coil on a vehicle. In some instances, the adapter may include an electrical connector to mate with a DC fast charger. In addition, the adapter may include hardware and/or software to receive a DC from the… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Pulse battery charger methods and systems for impr… | 78 |
| 2 | Transportation system of combined vehicles multi-c… | 71 |
| 3 | System and method for real-time distributed micro-… | 70 |
| 4 | Fast electric vehicle charging and distributed gri… | 69 |
| 5 | System and method for electrical grid management, … | 43 |
| 6 | System, apparatus and methods of electricity gener… | 41 |
| 7 | Method and device for determining the charging beh… | 40 |
| 8 | Edge-centric techniques and technologies for monit… | 30 |
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 patent structure means for R&D investment decisions
The combination of a Growth lifecycle stage, moderate top-tier concentration, absent co-filing activity, and strong US jurisdictional dominance shapes where risk and opportunity sit for new entrants and incumbents alike.
Growth stage with easing annual volume from a 2022 peak
The lifecycle stage is classified as Growth: the recent three-year filing window sits 72% above the prior three-year window, confirming that the field is still expanding on a multi-year basis. Annual volume has eased from its 2022 high, but this is partly attributable to publication lag in the most recent years. The window remains open for foundational claim-staking before the field enters a consolidation phase.
Growth stageTop five hold 45% of the hundred largest filers’ share — meaningful but not locked
Zoox Inc and ElectricFish Energy Inc sit in a distinct first tier, but the field below them is fragmented among single-digit holders. This structure means a well-resourced challenger filing across multiple IPC branches simultaneously could realistically enter the top tier within two to three filing cycles. The absence of a dominant player spanning all technology routes reduces blocking risk for targeted entrants.
Moderate concentrationNo co-applicant activity detected in this corpus
The collaboration evidence shows no co-filing partnerships in the current dataset. This is notable given that rail fast charging typically requires coordination across rolling-stock OEMs, grid operators, and charging-infrastructure providers. The absence of joint filings may indicate that cross-sector alliances have not yet formalised into patent co-ownership, or that relevant partnerships are captured outside this specific corpus. Monitoring for future co-filing activity between automotive and rail-infrastructure entities is warranted.
No co-filing detectedUnited States dominates; Europe and WIPO routes signal international ambition
The United States leads with 37 patent records, followed by WIPO PCT at 14 and Europe (EPO) at 5. India and the Netherlands each hold 2 records and Canada holds 1. The strong PCT presence relative to the small total corpus suggests that several applicants are preserving broad international option value, but substantive rail-market jurisdictions such as Germany, China, Japan, and the UK are not yet visible as filing destinations in this evidence, representing a geographic gap worth monitoring.
US-centric with PCT reachGo 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.
Co-filing pairs, ranked by the number of jointly-filed patent families.
Zoox and ElectricFish lead on volume; Nyobolt and Fermata Energy anchor the second tier
All momentum-tracked applicants entered the corpus as new entrants in the recent window, reflecting the field’s youth. Technology emphasis diverges meaningfully between the top two, creating distinct competitive identities.
Zoox Inc
Zoox Inc holds 11 patent records, the highest in the corpus, and is classified as a new entrant in the recent filing window. Its technology focus is concentrated in B60L 53 (EV propulsion charging protocols, 11 records), with secondary coverage in H02J 50 (grid power supply, 3 records) and H01M 10 (batteries and fuel cells, 2 records). This broad-but-propulsion-anchored profile suggests a strategy of establishing foundational charging-interface claims before branching into supporting subsystems.
patent records: 11ElectricFish Energy Inc
ElectricFish Energy Inc holds 8 patent records and is also a new entrant in the recent window. Its distinguishing feature is a strong AI and data-processing overlay: G06N 20 (AI computing models, 6 records) and G06Q 50 (business and administrative data processing, 6 records) sit alongside its B60L 53 propulsion records. This positions ElectricFish as the field’s most analytically oriented filer, with a strategy that couples physical charging architecture with intelligent energy-management software.
patent records: 8| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| Zoox Inc | 3 | ▲ new entrant |
| ElectricFish Energy Inc | 5 | ▲ new entrant |
| Nyobolt Ltd | 4 | ▲ new entrant |
| Fermata Energy LLC | 4 | ▲ new entrant |
| Ford Global Technologies LLC | 1 | ▲ new entrant |
| Plug P2P Inc | 2 | ▲ new entrant |
| GM Global Technology Operations LLC | 2 | ▲ new entrant |
| Siemens Industry Inc | 1 | ▲ new entrant |
Battery management, AI optimisation, and power conversion are under-served adjacent branches
Several IPC branches adjacent to the dominant B60L propulsion cluster carry low patent record counts relative to their technical relevance to rail fast charging. These are observations of relative sparsity; whether each represents a genuine entry opportunity depends on an applicant’s specific technical capabilities and commercial roadmap.
G06N · AI-driven charging optimisation
G06N (computing based on AI models) holds only 7 patent records and a 5% share of the branch distribution. For rail applications — where charging windows are tightly constrained by schedules, grid tariff structures, and multi-vehicle queuing — AI-based predictive and adaptive charging algorithms carry clear technical value. ElectricFish Energy Inc is the only top applicant with meaningful G06N coverage, meaning the branch is thinly contested. Applicants with existing AI or edge-computing IP in adjacent transport domains could extend into this branch with relatively low prior-art friction.
Search this in Eureka →H02M · Power conversion electronics
H02M (power conversion, AC/DC) holds only 4 patent records and a 3% share, despite power electronics being a foundational hardware layer for any high-power fast charging system. GM Global Technology Operations LLC is the only ranked applicant with H02M coverage, and only with 2 records. For rail contexts — which may involve pantograph-based or wireless high-voltage transfer at megawatt-class power levels — differentiated converter topologies and efficiency claims in this branch are sparsely covered. Power electronics specialists already active in traction or grid-interface applications are best positioned to exploit this gap.
Search this in Eureka →Leaders diverge sharply between hardware-first and software-first filing strategies
Route coverage across the main technology branches in the current evidence set.
| Player | B60L 53 · Electric vehicle propulsion | H02J 7 · Power supply & grid systems | B60L 58 · Electric vehicle propulsion | B60L 11 · Electric vehicle propulsion | H01M 10 · Batteries, cells & fuel cells |
|---|---|---|---|---|---|
| ElectricFish Energy Inc | Strong · 8 | Absent | Emerging · 1 | Absent | Strong · 5 |
| Zoox Inc | Strong · 11 | Absent | Absent | Absent | Emerging · 2 |
| Fermata Energy LLC | Strong · 4 | Moderate · 2 | Moderate · 2 | Absent | Absent |
| Atieva Inc (US) | Strong · 2 | Strong · 2 | Strong · 2 | Absent | Moderate · 1 |
| Plug P2P Inc | Strong · 3 | Absent | Strong · 2 | Absent | Absent |
| Nyobolt Ltd | Strong · 3 | Absent | Absent | Absent | Moderate · 1 |
| StoredgeAI LLC | Strong · 2 | Absent | Strong · 2 | Absent | Absent |
Frequently asked questions
The current corpus contains 54 patent families in scope. This is a small but actively growing body of prior art, with the recent three-year window showing 72% growth over the prior three-year window.
Zoox Inc leads with 11 patent records, followed by ElectricFish Energy Inc with 8 and Nyobolt Ltd and StoredgeAI LLC each holding 4 patent records. All top applicants entered as new filers in the recent window, reflecting the field’s early stage.
B60L (electric vehicle propulsion) is dominant at 61 patent records, followed by H02J (power supply and grid systems) at 28 and G06Q (business and administrative data processing) at 15. Power conversion (H02M) and AI computing (G06N) are comparatively sparse.
The United States leads with 37 patent records. WIPO PCT applications account for 14 records, suggesting applicants are preserving international option value. Europe (EPO) holds 5 records, with India and the Netherlands at 2 each and Canada at 1.
The field is classified as Growth. The recent three-year filing window is 72% above the prior three-year window on a multi-year basis. Annual volume has eased from its 2022 peak, partly due to publication lag in 2023–2025 data, which should be treated as provisional.
G06N (AI-based charging optimisation) with 7 patent records and H02M (power conversion electronics) with 4 patent records are the sparsest branches with clear technical relevance to rail fast charging. H01M (battery cell management) at 9 records and F25B (thermal management) at 2 records are also under-served relative to their engineering importance in high-power rail charging applications.
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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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