Forklift Electrification Patents: Top Companies & Filing Trends 2026
- One filer holds 103 of 317 records in scope — more than three times the fifth-place assignee's count of 12, a concentration rarely seen in industrial equipment patenting.
- Filing growth has flattened, not fallen 2021 to 2024 moved from 23 to 22 filings, a -4% span over the only years the dataset treats as complete.
- Measurement and grid classes rival propulsion itself G01R measurement claims (36.6% of records) and H02J power-supply claims (26.5%) sit nearly as dense as B60L propulsion (39.1%).
Filing growth compares 2021 (23 records) with 2024 (22) — 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 317 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
This review covers 317 published records matching electric forklift, lithium forklift battery, and forklift battery charging language, cross-referenced against battery swap, charge acceptance, state-of-charge, counterweight integration, thermal management, and fast-charging claims. The scope runs from 2015 through the 2026-07-31 data cut-off, though publication lag means the most recent filing years are still filling in. The set spans battery chemistry and pack design, propulsion control, state-of-charge and thermal management electronics, and the power-supply infrastructure that charges and swaps these packs.
Coverage is dominated by battery and propulsion-adjacent IPC classes rather than lift-mechanism classes, which signals that the active patenting fight in this field is inside the power system, not the forklift chassis. Receiving-office data shows the United States and Europe carrying the largest share of filings, with WIPO PCT filings indicating a meaningful cohort seeking multi-jurisdiction protection.
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Filing trends and technology composition
Two views of the same 317-record dataset: how filing activity has moved year over year, and how those records distribute across IPC subclasses.
Filing trend, 2017–2026
Filings rose from 1 in 2017 to a peak of 123 in 2018, then settled into a lower, comparatively stable band; 2021's 23 filings moved to 22 by 2024, a -4% span over the last years the dataset treats as complete. 2025 and 2026 figures are shown for completeness but will rise as publication catches up.
Technology composition by IPC subclass
H01M (batteries, cells & fuel cells) leads at 41.6% of the 317 records in scope, followed closely by B60L (electric vehicle propulsion) at 39.1% and G01R (electric & magnetic measurement) at 36.6%. H02J (power supply & grid systems) claims a further 26.5%, while B66F (jacks & lifting devices) — the classic forklift mechanism class — appears in only 8.5% of records, underscoring that this landscape is a power-electronics fight layered onto a mechanical platform, not the reverse. Records can carry multiple classes, so these shares sum to more than 100%.
Shares are the percentage of the 317 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Forklift Electrification and Battery Systems with Eureka
This page is one run against one query. Ask Eureka your own question about forklift electrification and battery systems and every answer comes back with the patent numbers behind it.
Try EurekaRepresentative and most-cited filings
Thermal management system for electric forklift (US20250042218A1)
A thermal management system for an electric forklift combining a battery cooling circulation loop, a battery heating circulation loop, a cab cooling circulation loop, and a cab heating circulation loop under a single turn-on control unit and thermal management control module. The battery cooling loop and a refrigerant sub-loop are arranged in parallel and share an electric compressor and condenser; the cab heating loop and battery heating loop share a heater and second power unit.Filed by Eneroc New Energy Technology Co., Ltd., published 2025-02-06 — illustrates how thermal loops for cab comfort and battery conditioning are increasingly claimed as a single shared-hardware system rather than separate subsystems.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20010052433A1 | Hybrid power supply module | 157 |
| 2 | US20190103639A1 | Modular lithium-ion battery system for fork lifts | 77 |
| 3 | US20060162973A1 | Hybrid power supply module | 76 |
| 4 | US20190036178A1 | Systems and methods for detecting thermal runaway of a battery | 68 |
| 5 | US20190033385A1 | Systems and methods for determining a state of charge of a disconnected battery | 64 |
| 6 | WO2001079012A2 | Hybrid power supply module with internal combustion engine or fuel cell | 59 |
| 7 | US20190033395A1 | Systems and methods for monitoring and presenting battery information | 56 |
| 8 | US20190033393A1 | Energy storage device, systems and methods for monitoring and performing diagnostics on batteries | 49 |
| 9 | US20190033384A1 | Operating conditions information system for an energy storage device | 47 |
| 10 | US20190033377A1 | Systems and methods for utilizing battery operating data and exogenous data | 41 |
Citation counts reflect influence within this searched corpus and skew toward older filings; treat them as a signal of prior-art density, not current commercial importance.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Browse MCP servers →What the data means for filing strategy
Three patterns stand out once the records are grouped by assignee, class, and year.
One filer sets the ceiling
The leading assignee alone accounts for 103 of the 317 records in scope, more than eight times the tenth-place count of 8. A concentration this steep in the top 5 (54.9% of all records) means a new entrant is not competing against a flat field but against one dominant claim set plus a long tail of single- or few-filing entrants.
Battery claims edge out propulsion claims
H01M (batteries, cells & fuel cells) narrowly leads B60L (electric vehicle propulsion) as the densest class, with G01R measurement claims close behind at 36.6%. The gap between these three and B66F lifting-mechanism claims at 8.5% shows where the claim pressure actually sits: in cell and pack design, propulsion control, and the sensing layer around state of charge — not in the mechanical lift.
A plateau, not a decline
Annual filings moved from 23 in 2021 to 22 in 2024, a -4% span across the only recent years the dataset treats as complete. That is a plateau after the 2018 peak of 123, not a retreat — and because publication lags filing by roughly 18 months, the 2025 and 2026 figures will revise upward as later filings surface.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to forklift electrification and battery systems, with the prior art for and against each one.
Assignee landscape
The ranked list covers 60 companies across 317 records — not a top-50 or top-100 cut, but the full set the data endpoint returns. Momentum figures below show recent-year activity is thin across even the most active names, consistent with a field where a handful of large filings from years past still dominate cumulative counts.
A single dominant filer
The top-ranked assignee holds 103 of the 317 records in scope — more than triple the fifth-place count of 12 — establishing a claim position that any new entrant in battery pack design or charging control will likely cross.
A thin but real second tier
Between fifth and tenth place, record counts fall from 12 to 8 — a much shallower drop than the gap from first to fifth. This mid-field is where most active, filing competitors sit, rather than the single-filing tail below them.
Even active filers are slowing
Recent-year momentum data shows even filers with multiple co-assignee ties, such as Ethium LLC, dropping to a single filing in the latest year with a -67% year-on-year change. Several other tracked assignees, including Toyota Industries, show zero filings in the latest year — again a lag effect as much as a retreat.
| Assignee | Recent year | YoY |
|---|---|---|
| ETHIUM LLC | 1 | -67% |
| Northstar Battery Co LLC | 0 | — |
| Ethium LLC | 0 | — |
| FERMATA LLC | 0 | — |
| Toyota Industries Corp | 0 | -100% |
| JSYoungTech | 0 | — |
| FERMATA ENERGY LLC | 0 | — |
| General Electric Co | 0 | — |
Where to take this analysis
The landscape points to a field with a dominant filer, a plateaued filing rate, and claim density concentrated in battery and propulsion classes rather than the lift mechanism itself.
Map freedom-to-operate against the leader's portfolio
With one assignee holding 103 of 317 records, any new battery pack, charging control, or thermal management design should be checked against that portfolio specifically, not just the field average.
Run a freedom-to-operate check in EurekaWatch the under-claimed branches before they fill in
Battery swap standardisation and cold-environment charge acceptance show thinner claim density than core H01M and B60L classes — a filing window that narrows as filings from 2025–2026 continue to publish.
Track white space in EurekaCommon questions about this landscape
One assignee leads clearly with 103 of the 317 records in scope, more than three times the fifth-place holder's 12 records. The next tier, from fifth to tenth place, drops more gradually from 12 to 8 records, forming a thin but active mid-field. Below that sits a long tail of assignees with only one or a handful of filings each, so competitive pressure in this field comes overwhelmingly from the top few names rather than from a broad, even field.
Filings peaked in 2018 at 123 and have since settled onto a lower plateau; from 2021 (23 filings) to 2024 (22 filings) the change was -4%, essentially flat rather than declining. Years after 2024 show fewer filings in the raw data, but that reflects publication lag — patent applications typically publish around 18 months after filing — rather than an actual drop in R&D activity. Treat any apparent fall in 2025-2026 filings as incomplete data, not a trend.
H01M (batteries, cells & fuel cells) appears in 41.6% of the 317 records in scope, the single densest class, closely followed by B60L (electric vehicle propulsion) at 39.1% and G01R (electric & magnetic measurement) at 36.6%. H02J (power supply & grid systems) claims a further 26.5%. By contrast, B66F, the class covering the lifting mechanism itself, appears in only 8.5% of records — confirming that the patenting fight is concentrated in the power and battery electronics layered onto the forklift, not the mechanical lift structure.
US20250042218A1, filed by Eneroc New Energy Technology and published 2025-02-06, claims a thermal management system for electric forklifts that combines battery cooling, battery heating, cab cooling, and cab heating loops under one control module. Its distinguishing feature is sharing hardware, specifically an electric compressor, condenser, heater, and second power unit, across what are normally separate cooling and heating circuits. Anyone designing a combined cab-and-battery thermal system for an electric forklift should review this claim scope closely, since it covers the shared-hardware architecture rather than any single loop in isolation.
Relative to the dense H01M, B60L, and G01R classes, sub-areas like battery swap mechanism standardisation, cold-environment charge acceptance algorithms, and counterweight-integrated structural battery claims show thinner coverage. Overlap classes such as G06Q (fleet-level state-of-charge data processing) and G08B (thermal-runaway alarm integration) also sit at single-digit shares of the 317 records, suggesting these adjacent-system claims are less crowded than the core battery and propulsion space. These are the branches most likely to still have room for a clean first claim, though that window narrows as 2025-2026 filings continue to publish.
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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.