Lithium Iron Phosphate Battery Current Collector Patent Landscape 2026
- 199 families, 130 filed in China alone. Filing activity has concentrated heavily in one jurisdiction, with the US a distant second at 36 and Europe, Japan, Korea and PCT filings trailing further behind.
- Filing peaked in 2025 at 23, after a flat mid-decade. 2022 sat at 17 — the field did not show sustained growth into the peak, and the 2026 count is still partial under the usual ~18-month publication lag.
- Recent-year momentum has gone quiet across the named assignees. Every assignee tracked for recent-year activity — including CATL, LG Chem and LG Energy Solution — shows zero filings in the latest year, LG Energy Solution down -100% YoY.
Filing growth compares 2021 (10 records) with 2024 (17) — 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 199 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
This landscape tracks patent families combining lithium iron phosphate (LFP) chemistry with current collector technology — aluminum foil, carbon-coated foil and collector-foil claims filed under the core battery IPC classes (H01M4/64, H01M4/66, H01M4/70). It is a narrow intersection: a foil-and-coating layer sitting between an LFP cathode and a cell tab, not the broader LFP cathode-material literature.
199 records span 2015 through the 2026 cut-off. The dataset is dominated by H01M filings, with small overflow into nanotechnology, inorganic compound and alloy classes — evidence that most inventive activity here sits squarely inside conventional battery-cell claim language rather than adjacent materials science.
Filing trend and technology composition
Two views of the same 199 families: how filing volume moved year over year, and which IPC subclasses the claims actually sit in.
A flat decade with a late peak
Filings ran at 6 in 2017, held near a midpoint of 17 by 2022, and reached a peak of 23 in 2025 before the partial 2026 count. That trajectory reads as flat-to-declining momentum rather than a growth curve — the peak is a late bump, not the top of a climb, and the 2026 figure will rise as later filings publish.
Concentrated in core battery classes
All 199 records touch H01M. The next-largest subclass, C01B (non-metallic elements and inorganic compounds), appears in only 9 records, with B82Y nanotechnology, C01G, C07C, C22C, H01L and B01J each contributing single digits. Claim activity outside the core battery-cell classification is marginal.
Shares are the percentage of the 199 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Lithium Iron Phosphate Battery Current Collector with Eureka
This page is one run against one query. Ask Eureka your own question about lithium iron phosphate battery current collector and every answer comes back with the patent numbers behind it.
Try EurekaA representative filing and the most-cited prior art
Lithium iron phosphate (LFP) cathode active materials and method for deposition of the same
The embodiments herein provide lithium iron phosphate (LFP) cathode active materials and a method for deposition of the LFP active materials on an aluminum-foil current collector for lithium-ion (Li-ion) batteries. The embodiments herein utilize an aqueous based LFP precursor slurry made using combustion chemistry, where the LFP precursor slurry is composed of a redox mixture of the nitrates of lithium and iron, dihydrogen ammonium phosphate and glycine in water in the presence of flora-based sodium-carboxy methylcellulose as an organic binder. Furthermore, the thick and transparent precursor slurry is deposited on the aluminum current collector followed by annealing at appropriate pressure.Filed by QPIVOLTA Technologies Private Limited, published 2024-02-29 as US20240072257A1.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | CN110943215A | 锂离子二次电池 | 74 |
| 2 | CN101436654A | 磷酸铁锂型安全高功率锂离子电池 | 51 |
| 3 | CN101183729A | 一种高容量磷酸铁锂动力电池及其制作工艺 | 45 |
| 4 | CN108550858A | 一种抑制锂枝晶的铜锌合金集流体 | 40 |
| 5 | CN108511689A | 一种含有导电涂层的锂离子电池正极片及其制备方法 | 37 |
| 6 | CN102185129A | 一种磷酸铁锂锂离子电池片及其加工方法 | 29 |
| 7 | CN101183730A | 一种磷酸铁锂铝壳8安时圆柱电池及其制作工艺 | 29 |
| 8 | CN108306013A | 一种快充快放型高功率锂离子电池及制作方法 | 27 |
| 9 | CN104577130A | 软包装高功率磷酸铁锂动力电池 | 27 |
| 10 | CN101227015A | 高倍率及高安全性能的圆柱型锂离子电池 | 27 |
Citation counts favour older, foundational filings inside this searched corpus — treat them as markers of influence on later claim drafting, not as a ranking of current commercial relevance.
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. Each row carries its publication number; clicking a row searches Eureka by that number.
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Four read-throughs from the filing trend, the IPC spread and the receiving-office data — useful for deciding where a new filing is likely to face dense prior art versus open ground.
The peak is late, not the top of a curve
Filings sat at 6 in 2017 and only 17 by 2022 before reaching 23 in 2025. That is a slow build rather than sustained exponential growth, and the partial 2026 figure will understate true 2026 activity once later filings publish.
Filing is concentrated in one office
China accounts for the large majority of receiving-office filings, with the US a distant second at 36. Europe, Japan, Korea and PCT combined add fewer than 30 filings — a filer targeting only Western markets is working from a much smaller slice of this art.
Almost no drift outside core battery claims
Every record in this corpus touches H01M. The next subclass, C01B, appears in only 9 records. Inventive activity here is overwhelmingly framed as battery-cell claim language, not as materials-science or nanotechnology claims dressed up in battery terms.
Momentum has stalled at the top
Every assignee tracked for recent-year momentum — CATL, LG Chem, Sanyo, LG Energy Solution, Shandong Haiba, Tianjin University — shows zero filings in the latest year, with LG Energy Solution down -100% YoY. That does not mean the field is dead; it means recent filings from these entities have not yet published.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to lithium iron phosphate battery current collector, with the prior art for and against each one.
| Assignee | Co-assignee | Shared families |
|---|---|---|
| Sanyo Electric Co., Ltd. | Sanyo Denki Co., Ltd. | 1 |
| Tianjin University | YUAN YINGJIN | 1 |
Only two co-assignee pairs appear in the dataset — Sanyo Electric with Sanyo Denki, and Tianjin University with an individual inventor, Yuan Yingjin. Most filings in this space are single-assignee; cross-entity collaboration on current-collector claims specifically is the exception, not the norm.
Who is filing, and where the claim space is still open
Assignee concentration sits alongside a long tail of single-filing entrants. The chips below flag sub-areas inside this dataset that show thin filing density relative to the core H01M claims.
A long tail behind a concentrated top
The assignee ranking is built from all 199 families, and activity follows the usual pattern for a mature claim area: a handful of repeat filers at the top, then a long tail of organisations with one or two filings each.
No assignee shows fresh recent-year filings
CATL, LG Chem, Sanyo, LG Energy Solution, Shandong Haiba and Tianjin University all show zero filings in the most recent year on record, with LG Energy Solution's count down -100% year over year.
Cross-filing is the exception
Sanyo Electric and Sanyo Denki, and Tianjin University with an individual inventor, are the only co-assignee pairs in the corpus. Most parties file alone on current-collector claims, even where they co-develop cell chemistry elsewhere.
| Assignee | Recent year | YoY |
|---|---|---|
| Contemporary Amperex Technology Co., Ltd. (CATL) | 0 | — |
| LG Chem, Ltd. | 0 | — |
| Sanyo Electric Co., Ltd. | 0 | — |
| LG Energy Solution, Ltd. | 0 | -100% |
| Shandong Haiba Battery Co., Ltd. | 0 | — |
| Tianjin University | 0 | — |
| Zhuhai CosMX Battery Co., Ltd. | 0 | — |
| Samsung SDI Co., Ltd. | 0 | -100% |
Where to take this landscape
The dataset points to a concentrated, geographically skewed field with claim activity almost entirely inside H01M. Three directions follow from that.
Check freedom-to-operate before filing in China
With 130 of 199 families filed in China, any new collector-foil claim aimed at that market needs a dedicated FTO pass against the local filer base, not just the internationally cited prior art.
Run a freedom-to-operate searchWatch for a publication catch-up in 2026-27
Zero latest-year filings across every named assignee is consistent with the ~18-month publication lag, not a slowdown. Expect the 2025-26 filing count to revise upward as pending applications publish.
Track assignee filing activityProbe the thin IPC branches for open claim space
C01B, B82Y, C01G, C07C, C22C, H01L and B01J each carry single-digit record counts against 199 in H01M. That gap is where a differentiated coating or alloy claim is less likely to collide with existing art.
Map white space with Patsnap EurekaCommon questions on LFP current-collector patents
Of the 199 families in this dataset, 130 were filed at the Chinese receiving office, versus 36 in the US and single-digit counts elsewhere. This reflects where LFP cell manufacturing capacity and battery-materials R&D are concentrated, since collector-foil process patents tend to be filed close to where the coating and lamination lines actually run. A company shipping cells manufactured in China should treat the Chinese filer base as the primary prior-art pool, not a secondary one.
The trend is flat rather than growing: filings moved from 6 in 2017 to 17 at the 2022 midpoint and reached a peak of 23 in 2025. That is a gradual rise over nearly a decade, not an acceleration, and the 2026 count is still partial because publication typically lags filing by about 18 months. Read the most recent one to two years of any such trend as a floor, not a ceiling.
It does not mean these companies have stopped innovating in this space. Every tracked assignee — including CATL, LG Chem, Sanyo and LG Energy Solution — shows zero filings in the latest year, which is the expected pattern when recent applications have not yet published. Competitive-intelligence teams should treat this as a visibility gap rather than a pullback and revisit the ranking again once the next publication cycle completes.
The IPC composition shows 199 of 199 records in H01M but only single-digit counts in adjacent classes such as C01B, B82Y, C01G, C07C, C22C, H01L and B01J. That gap suggests collector-foil claims framed around alloy composition, nanostructured interlayers or non-standard slurry chemistry face thinner prior art than claims framed as conventional battery-cell structure. It is not proof of an empty field, but it is a reasonable place to start a freedom-to-operate check.
US20240072257A1, filed by QPIVOLTA Technologies Private Limited and published 2024-02-29, claims a method for depositing LFP cathode active material onto an aluminum-foil current collector using an aqueous precursor slurry made by combustion chemistry — nitrates of lithium and iron, dihydrogen ammonium phosphate and glycine, with a carboxymethylcellulose binder, annealed under pressure. It is a process claim tied to that specific slurry chemistry and deposition route, not a claim over aluminum-foil collectors generally. Anyone using a different precursor chemistry or deposition method would need a separate claim-by-claim comparison rather than assuming automatic overlap.
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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.