Battery Manufacturing Patents: Top Companies & Filing Trends 2026
- 31.4% concentration at the top. The five leading filers account for 1,078 of 3,429 records in scope — a concentrated core with a long tail of single- and few-filing entrants behind it.
- Filing kept climbing through the recent complete years. 2021 to 2024 filings rose 8%, from 317 to 342 records a year, even after a 2023 peak of 393 — this is not a cooling field.
- Measurement and control classes rival the cell-chemistry core. G01R electric and magnetic measurement appears on 14.7% of records and H02J power supply/grid systems on 11.5% — manufacturing process control is claimed almost as heavily as the cells themselves.
Filing growth compares 2021 (317 records) with 2024 (342) — 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 3,429 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
This landscape tracks patent filings at the intersection of battery cell and electrode manufacturing and the process controls that govern it — process temperature, tool geometry, material feed, dimensional tolerance, state of charge and electrode capacity. It is a manufacturing-process view of the battery field, not a cell-chemistry survey: the search string pairs manufacturing terms with process-control terms, so the records that surface are the ones where a production step itself is the claimed invention.
The corpus spans 3,429 published records filed from 2015 through the 2026 cut-off, reaching receiving offices led by the United States, the EPO and the WIPO PCT route, with meaningful volume in India, Japan and Australia. Because publication lags filing by roughly 18 months, the final one or two years in any trend chart will always look lighter than they will once the backlog clears.
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Filing trend and technology composition
Two views of the same 3,429 records: how filing volume has moved year over year, and which IPC subclasses carry the claims.
Filing trend: steady growth through the last complete years
Annual filings rose from 91 in 2017 to a peak of 393 in 2023, and the 2021-2024 window — the last stretch unaffected by publication lag — shows an 8% rise from 317 to 342 records a year. 2025 and 2026 figures are still filling in and should not be read as a slowdown.
IPC composition: process control classes sit alongside the cell core
H01M (batteries, cells and fuel cells) anchors the field at 78.5% of the 3,429 records. G01R (electric and magnetic measurement, 14.7%) and H02J (power supply and grid systems, 11.5%) show how much of the claim activity is about controlling and verifying the process rather than the cell chemistry alone; B60L, C01G, H01G, C22B and G01N each carry a smaller but distinct slice.
Shares are the percentage of the 3,429 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Battery Manufacturing Patent Landscape with Eureka
This page is one run against one query. Ask Eureka your own question about battery manufacturing patent landscape and every answer comes back with the patent numbers behind it.
Try EurekaThe most-cited records and a recent representative filing
WO2025131310A1 — closed-loop control of powder feeding for electrode manufacturing
The filing describes closed-loop control of a powder feeding apparatus and of the wider electrode manufacturing system, built on in-line measurement of quality parameters. The stated aim is to raise material and energy efficiency while tightening accuracy and reliability against quality and performance targets during the manufacturing process itself.Filed by ABB Schweiz AG, published 2025-06-26 — abstract condensed from the original filing.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US5952815A | Equalizer system and method for series connected energy storing devices | 448 |
| 2 | US20160351973A1 | Nano-engineered coatings for anode active materials, cathode active materials, and solid-state electrolytes a… | 292 |
| 3 | US4745349A | Apparatus and method for charging and testing batteries | 283 |
| 4 | US20030206021A1 | Method and apparatus for measuring and analyzing electrical or electrochemical systems | 273 |
| 5 | US3876931A | Method and apparatus for determining battery performance at one temperature when battery is at another temper… | 257 |
| 6 | US6087036A | Thermal management system and method for a solid-state energy storing device | 234 |
| 7 | US6411098B1 | Energy device analysis and evaluation | 226 |
| 8 | US20160105042A1 | Systems and methods for series battery charging | 212 |
| 9 | US20100213897A1 | Battery-Cell Converter Management Systems | 196 |
| 10 | US20050277023A1 | High discharge capacity lithium battery | 149 |
Citation counts are drawn from a search-limited corpus and are highest for the oldest, most foundational records — read them as a signal of influence, not of current relevance to new filings.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Browse MCP servers →What the numbers mean for filing decisions
Three findings that shape where a new filing is likely to land, and where it is likely to collide with existing claims.
The top of the field is dense, the rest is a long tail
Five assignees hold 1,078 of the 3,429 records in scope, and the tenth-ranked filer already sits at only 44 records against the leader's 533. That gap between the leader and the rest of the ranked group means a new entrant is competing against one or two dominant claim portfolios far more than against the field as a whole.
Growth held through the last complete filing years
Annual filings rose from 317 in 2021 to 342 in 2024, after touching a peak of 393 in 2023. That is a field still adding claim volume, not one in decline — treat any apparent drop in 2025-2026 figures as a publication-lag artefact, not a real slowdown.
Measurement and grid-power classes carry real claim weight
G01R (electric and magnetic measurement) and H02J (power supply and grid systems) together sit on a quarter of records between them alongside the dominant H01M class. Process instrumentation and power-supply integration are claimed almost as densely as the cell itself, which narrows the room for a purely instrumentation-based filing.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to battery manufacturing patent landscape, with the prior art for and against each one.
Who is filing, and where momentum is shifting
The ranked leaders combine large established filers with a long tail of single-digit entrants; recent-year momentum shows the picture is not static.
One filer sits well ahead of the field
The leading assignee holds 533 records against a fifth-place figure of 95 and a tenth-place figure of 44 — a steep drop-off that marks this as a field with one dominant portfolio rather than a tight cluster of equals at the top.
Leading filers are pulling back in the most recent year
Several of the largest historical filers show sharp latest-year declines against their prior-year counts. Given the 18-month publication lag, part of this is backlog rather than a genuine pullback, but the pattern is consistent enough across multiple leaders to watch rather than dismiss.
Co-filing is limited and concentrated in a few relationships
Only ten co-assignee pairs appear in the data, with the strongest pairing well ahead of the others in joint-filing volume. Co-development in this space is the exception, not the norm — most records carry a single assignee.
| Assignee | Recent year | YoY |
|---|---|---|
| LG Energy Solution Ltd | 20 | -58% |
| Samsung SDI Co Ltd | 5 | -82% |
| 24M Technologies Inc | 1 | -96% |
| ESS Tech Inc | 0 | -100% |
| LG Chem Ltd | 0 | — |
| Toyota Jidosha KK | 0 | -100% |
| Contemporary Amperex Technology Co., Ltd. (CATL) | 0 | — |
| Gogoro Inc | 0 | — |
Where to take this analysis
The figures above describe the field as it stands; the next step is usually to test a specific claim or filing gap against the full record set.
Check a draft claim against the cited core
The most-cited records in this landscape, several dating to the 1980s and 1990s, still anchor citation chains in battery measurement and charging control. Before drafting a process-control claim, check it against that cited core rather than only recent filings.
Explore the citation networkWatch the leader-momentum shift
Several of the largest historical filers show sharp declines in latest-year counts. Whether that is a genuine pullback or a publication-lag artefact will become clear as 2025-2026 data fills in — worth revisiting this dataset in six months.
Track assignee momentumCommon questions about this landscape
One assignee leads the ranked field with 533 records, well ahead of the fifth-place filer at 95 and the tenth-place filer at 44. The top five filers combined hold 1,078 records, or 31.4% of the 3,429 records in scope, so the field has a genuinely dominant leader rather than a tight cluster of similarly sized competitors. Behind that leading group sits a long tail of the ranked companies with far smaller counts, which is typical of a manufacturing-process niche layered onto a larger cell-chemistry field.
Filings grew through the last fully complete years on record: 317 in 2021 rising to 342 in 2024, an 8% increase, with a peak of 393 in 2023. Because publication lags filing by roughly 18 months, the 2025 and 2026 figures in any chart are still filling in and understate real activity — they should not be read as evidence of a slowdown. Based on the complete-year data, this is a field still adding claim volume rather than one in decline.
H01M, the core batteries-and-cells classification, appears on 78.5% of the 3,429 records, confirming that most filings sit squarely in cell and battery construction. But G01R electric and magnetic measurement (14.7%) and H02J power supply and grid systems (11.5%) both carry meaningful weight, showing that process instrumentation and power integration are claimed almost as heavily as the cells themselves. Smaller slices in B60L electric vehicle propulsion, C01G metal compounds, H01G capacitors, C22B metal extraction and G01N material testing round out the picture.
The smaller IPC classes in this dataset — C22B metal extraction and refining at 2.3% of records and G01N material analysis and testing at 2.0% — carry far less filing density than the dominant H01M core, which suggests room for narrowly drawn claims there. In-line quality control tied to material feed and dimensional tolerance, and state-of-charge-linked process temperature control, are specific technical routes named in the search scope that are not yet saturated the way core cell-construction claims are. Any white-space claim should still be checked against the most-cited records in the field before drafting, since several of those sit in adjacent measurement and control art.
WO2025131310A1, filed by ABB Schweiz AG and published 2025-06-26, claims closed-loop control of a powder feeding apparatus and of the broader electrode manufacturing system, based on in-line measurement of quality parameters. It matters because it sits directly in the process-control layer of electrode manufacturing rather than in cell chemistry, the layer this dataset shows is already carrying real claim density through G01R and H02J classes. Anyone drafting a powder-feed or in-line quality-control claim for electrode manufacturing should read this filing closely before finalising claim scope.
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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.