Dry Electrode Manufacturing Patents: Top Companies & Trends 2026
- Filing peaked in 2023 at 9 records then activity cooled going into 2024-2025, with several leading assignees showing 0 filings and -100% year-on-year in the latest year on record.
- One assignee holds 10 of the 25 records in scope while the rest of the ranked field thins quickly to single-digit and single-filing entrants.
- Presses and web-handling equipment classes trail batteries themselves B30B (presses) appears on 28.0% of the 25 records, but coating, powder-metallurgy and film-handling classes each sit at 4-8%, signalling thin claim coverage outside the core roller/calendering stack.
What this landscape covers
Dry electrode manufacturing removes the solvent-coating step from lithium-ion and solid-state electrode production, replacing it with binder fibrillation and calendering to form a free-standing film. The claims in this dataset cluster around the mechanical apparatus that does that work — rollers, presses and film-handling gear — rather than the chemistry of the binder or active material itself. That skew toward equipment claims, not formulation claims, is the defining feature of this corpus. The 25 records in scope span filings from South Korea, the United States, Europe, China, India and the WIPO PCT route, with South Korea the single largest receiving office.
Because publication typically lags filing by around 18 months, the apparent slowdown after 2023 is likely overstated for the very latest year; some 2025-2026 filings will not have published yet. Reading the trend as flat-to-declining from the 2023 peak, rather than as a cliff, is the safer interpretation.
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Filing trend and technology composition
Two views of the same 25-record corpus: how filing activity has moved year over year, and which IPC subclasses the claims actually sit in.
Filing trend
Filings were at zero in 2017, built gradually, and peaked at 9 records in 2023 — the single busiest year in the dataset. By the midpoint year, 2022, activity was still just 2 records, so most of the volume is concentrated in a short window around the peak rather than spread evenly across the period.
Technology composition (IPC subclasses)
Every record in scope sits in H01M (batteries and cells), as expected for the topic. The next most common class, B30B (presses), covers 28.0% of the 25 records — consistent with calendering being the central mechanical operation. Coating apparatus, coating processes, powder metallurgy, web-handling and specific plastics classes each register at only 4-8% of records, well below the press-related share.
Shares are the percentage of the 25 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Dry Electrode Manufacturing for Solid-State Batteries with Eureka
This page is one run against one query. Ask Eureka your own question about dry electrode manufacturing for solid-state batteries and every answer comes back with the patent numbers behind it.
Try EurekaMost-cited records and a representative filing
US20250174625A1 — Dry electrode manufacturing apparatus, method of manufacturing dry electrode, and dry electrode
The apparatus supplies a fine powder to a first and second roller that calender it into an electrode film, then a third and fourth roller stretch that film. Each roller pair turns at a different velocity and in a different rotational direction from its neighbour, which is the mechanism the claims use to control film strength and line speed.Filed by Samsung SDI, published 2025-05-29.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | KR1020230078293A | An electrode sheet calendering apparatus and a dry electrode manufacturing apparatus comprising the calenderi… | 3 |
| 2 | KR1020240057378A | A dry electrode manufacturing apparatus | 2 |
| 3 | EP4560715A2 | Dry electrode manufacturing apparatus, method of manufacturing dry electrode, and dry electrode | 1 |
| 4 | US20250174625A1 | Dry electrode manufacturing apparatus, method of manufacturing dry electrode, and dry electrode | 1 |
| 5 | WO2024090969A1 | Dry electrode manufacturing apparatus | 1 |
| 6 | CN116825948A | 干电极制造方法和干电极制造设备 | 1 |
| 7 | KR1020230149755A | Preparation method for dry electrode for secondary battery | 1 |
Citation counts favour older filings that have had more time to be cited within this searched set; treat them as a signal of influence, not of current commercial weight.
Patent titles are shown in the language they were filed in, not translated, so that each record stays verifiable against the original filing — a translated title will not match in Eureka or in any national register. Publication numbers are shown where the record carries one (7 of 7 rows); clicking a row searches Eureka by that number.
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Browse MCP servers →What the numbers say about where this field stands
Three read-throughs from the filing trend, the IPC split and the receiving-office mix.
A short, sharp filing window, now cooling
Volume built from zero in 2017 to a peak of 9 records in 2023, then several of the most active assignees show 0 filings and -100% year-on-year in the latest year. Given the usual 18-month publication lag, the true 2025-2026 picture is likely understated rather than genuinely flat.
Claims concentrate on the roller and press stack
Every record touches H01M by definition of the search, but the meaningful split is how many also claim press apparatus (B30B) versus coating, powder or web-handling equipment. The gap between 28.0% and the 4-8% range for the other classes shows most inventive effort has gone into the calendering mechanism itself.
South Korea leads receiving offices, ahead of Europe and the US
South Korea accounts for the largest single share of receiving-office activity at 9, with Europe (EPO) and the United States tied at 4 each, China at 3, WIPO (PCT) at 3 and India at 2. That spread across six offices, with no single jurisdiction dominant, points to a technology still being filed defensively across multiple markets rather than consolidated behind one filing strategy.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to dry electrode manufacturing for solid-state batteries, with the prior art for and against each one.
| Assignee | Co-assignee | Shared families |
|---|---|---|
| CNP Solutions Co., Ltd. | WI-A Corporation | 2 |
| Kia Corporation | Hyundai Motor Co., Ltd. | 1 |
| MR CH SRIKANTH (ASSISTANT PROFESSOR) | DR K SHIRISH KUMAR (ASSOC PROFESSOR) | 1 |
Only 3 co-assignee pairs appear across the 25 records, and the strongest pair links just two organisations. This is largely a single-assignee filing field rather than one built on joint ventures or co-development agreements.
Who is filing, and who is not
The ranked field covers 12 companies counted in records; it is not a top-50 or top-100 list, it is the whole ranking the dataset returns. One organisation holds 10 records, fifth place holds 2, and the field runs out to single-record entrants by tenth place.
One assignee holds the largest single share
The leading assignee accounts for 10 of the 25 records in this corpus, well ahead of the rest of the ranked field. That gap suggests a sustained, multi-year filing programme around dry electrode calendering rather than opportunistic single filings.
A thin middle tier
Fifth place in the ranking holds only 2 records, and the field narrows to single-record filers by the tenth position. That leaves little room between the leader and a long tail of academic and single-filing entrants — a structure typical of an equipment niche still being staked out rather than commoditised.
Recent-year activity has gone quiet across the top filers
Several of the most active assignees, including the leader, show zero filings and a -100% year-on-year change in the latest tracked year. Because publication lags filing by roughly 18 months, some of this apparent pause will fill in as later filings publish, but the near-term signal is a slowdown rather than acceleration.
| Assignee | Recent year | YoY |
|---|---|---|
| Samsung SDI Co., Ltd. | 0 | -100% |
| LG Energy Solution Ltd. | 0 | — |
| GRINERGY CO LTD | 0 | — |
| CNP Solutions Co., Ltd. | 0 | -100% |
| WI-A Corporation | 0 | -100% |
| Kia Corporation | 0 | -100% |
| Hyundai Motor Co., Ltd. | 0 | -100% |
| Shanghai Xiandao Huineng Technology Co., Ltd. | 0 | — |
Where to take this
The filing trend and the IPC split both point to a field where the equipment claims are concentrated but the process-control and material-handling claims around them are not.
Check freedom-to-operate on the roller stack
The most-cited records and the leader's 10-record position both centre on multi-roller calendering with differential velocity control. Any new dry-electrode line design should be checked against that claim structure before finalising roller geometry.
Explore the claims in Eureka →Watch for a publication catch-up in 2025-2026
The apparent drop to zero filings for several leading assignees is partly a publication-lag artefact. Re-run this search in a few quarters to see whether the 2023 peak was a plateau or an actual retreat.
Set up monitoring in Eureka →Look at the under-claimed sub-areas first
Coating apparatus, powder metallurgy and web-handling classes each sit at 4-8% of records, far below the press-related share. That gap is where a first claim is more likely to clear prior art.
Map white space in Eureka →Common questions on dry electrode manufacturing patents
One assignee leads the ranked field with 10 of the 25 records in this corpus, a clear margin over the rest of the ranking. The ranking covers 12 companies in total, and it thins quickly after the leader, with fifth place holding only 2 records and the tenth position down to a single record. This is a concentrated-at-the-top, long-tail structure rather than a field with several evenly matched competitors.
Filings rose from zero in 2017 to a peak of 9 records in 2023, then several of the most active assignees show zero filings and a -100% year-on-year change in the most recent tracked year. Because patent publication typically lags filing by around 18 months, some of that apparent drop is a reporting artefact rather than a genuine halt. The safest reading is that the field has flattened or eased back from its 2023 peak, not that it has stopped.
The strongest and most-cited claims describe multi-roller calendering apparatus that forms a free-standing dry film and then stretches it using rollers turning at different velocities and directions, as seen in the representative Samsung SDI filing. The concentration of records in the B30B press class, at 28.0% of the 25 records in scope, backs up that this roller-and-press approach is the dominant documented route. Other routes, such as spray-based or powder-metallurgy-adjacent approaches, appear in the dataset but at far lower frequency.
Classes outside the core press/calendering stack — coating apparatus, coating processes, powder metallurgy, web and sheet handling, and specific plastic articles — each sit at only 4-8% of the 25 records in scope, compared with 28.0% for press-related claims. That gap suggests process-control elements around the roller stack, such as in-line film-strength sensing or fibrillation-stage binder metering, are less densely claimed. A first filing targeting one of those adjacent process-control steps is more likely to find open claim space than another roller-geometry patent.
South Korea is the largest single receiving office with 9 filings, followed by Europe (EPO) and the United States tied at 4 each, China at 3, the WIPO PCT route at 3, and India at 2. That spread across six offices without one dominant jurisdiction suggests applicants are pursuing multi-market protection rather than filing defensively in a single home market. It also means a freedom-to-operate check for this technology needs to cover several regions, not just one.
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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.