LFP Battery Design Patents: Who Leads, Where the Gaps Are 2026
- 38 families total, with filing peaking at 6 in 2022 and no clear renewed climb since — this is a plateaued, not accelerating, claim space.
- United States and Europe lead receiving offices, 11 and 10 filings respectively, ahead of China's 9 — filing geography does not simply mirror where LFP cells are made.
- The most-cited record dates to 2009, and still outranks every newer filing by a wide margin, meaning foundational cathode-material claims still anchor freedom-to-operate analysis today.
Top-5 share is the combined record count of the five largest assignees divided by all 38 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
This dataset tracks patent families at the intersection of lithium iron phosphate (LFP) chemistry and cell design optimization — thick-electrode architectures, cell-level design choices, and the energy-power balance trade-off, rather than LFP chemistry broadly. The search combines LFP-specific terms with design-optimization language in the title and claims, filtered to battery, computation-aided-design and related IPC classes.
Coverage runs from 2015 through the 2026-07-31 cut-off. Because publication typically lags filing by around 18 months, the most recent one to two years of activity shown here will be revised upward as later filings publish — the 2026 figure in particular is a partial-year count, not a finished one.
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Filing trends and technology composition
Two views of the same 38-family dataset: how filing volume has moved year over year, and which IPC subclasses the claims actually sit in.
Filing trend, 2017–2026
Filings rose from zero in 2017 to a peak of 6 in 2022, the dataset's midpoint year, then eased off rather than continuing to climb — a pattern consistent with a technology whose core design claims were staked out early and are now being refined at the margins rather than opened up fresh.
IPC subclass composition
H01M (batteries, cells and fuel cells) accounts for every record in this set by construction of the search, but the secondary classes are informative: C01B, C01D, C01G and C25B point to materials and electrolytic-production overlap, H04R (audio transducers) and H01G (capacitors) show design claims reused from adjacent small-cell and power-electronics contexts, and B05D (coating processes) marks a thin but present electrode-coating thread.
Shares are the percentage of the 38 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 Design Optimization with Eureka
This page is one run against one query. Ask Eureka your own question about lithium iron phosphate battery design optimization and every answer comes back with the patent numbers behind it.
Try EurekaMost-cited records and a recent representative filing
WO2026092217A1 — LFP battery with silicon-doped anode and thick-electrode design
This SVOLT Energy Technology filing describes an LFP battery combining a silicon-based anode additive, thick-electrode areal densities (cathode ≥23 mg/cm², anode ≥7.8 mg/cm²), and a tailored electrolyte formulation — solvent blends of ethylene carbonate with small-molecule linear solvents, plus FEC and vinylene-carbonate film-forming additives — to lift energy density while holding cycle life and fast-charge capability.Filed 2026-05-07; abstract translated from the original Chinese filing.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20090155689A1 | Lithium iron phosphate cathode materials with enhanced energy density and power performance | 186 |
| 2 | US20100327223A1 | Lithium Iron Phosphate Cathode Materials With Enhanced Energy Density And Power Performance | 47 |
| 3 | WO2008118478A1 | Hearing aid with secondary battery and electrical contacts to charge battery | 40 |
| 4 | US20080241645A1 | Lithium ion secondary batteries | 35 |
| 5 | CA2614634A1 | Lithium iron phosphate cathode materials with enhanced energy density and power performance | 29 |
| 6 | US20230108289A1 | Positive-electrode material, positive electrode plate, lithium secondary battery, battery module, battery pac… | 13 |
| 7 | CN115275109A | 一种长循环磷酸铁锂厚电极及其制备方法和锂离子电池 | 12 |
| 8 | US20170162865A1 | Cathode for lithium batteries | 12 |
| 9 | CN115132999A | 一种钠电池用铁基磷酸盐正极及其制备方法和应用 | 9 |
| 10 | US20210210782A1 | Composite Solid Electrolyte Including Lithium Iron Phosphate | 9 |
Citation counts favour older documents simply because they have had longer to accumulate citations within the searched corpus — read them as a signal of historical influence on cathode-material claims, 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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Browse MCP servers →What the numbers mean for a filing decision
Three read-throughs from the trend, geography and citation data that matter more than the raw counts on their own.
A plateau, not a growth curve
Volume rose to 6 filings in 2022 and has not exceeded that since. Combined with the 18-month publication lag, this does not prove decline, but it does not show the kind of steep post-midpoint acceleration you would expect if the field were still opening up new claim territory.
Filing location does not track manufacturing location
The United States and European receiving offices each carry more filings than China, despite China's dominant position in LFP cell manufacturing. That gap is worth investigating case by case — it may reflect where design-optimization R&D and IP strategy sit versus where production volume sits.
Foundational cathode claims still anchor the field
The most-cited record in this set is a 2009 filing on enhanced energy-density and power-performance cathode materials, cited far ahead of anything filed since. Any new thick-electrode or energy-power-balance claim in this space should be checked against that lineage before assuming it is clear ground.
A small, tightly linked inventor cluster
The strongest co-assignee pairs in the dataset repeat the same three names across multiple filings, suggesting a compact core team behind several of the cathode-material families rather than a broad, diffuse set of independent filers.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to lithium iron phosphate battery design optimization, with the prior art for and against each one.
Who is filing, and where the door is still open
Recent-year momentum across the named assignees is uniformly flat to negative — nobody in this set is currently accelerating.
No assignee is currently accelerating
Every named assignee tracked for recent-year momentum, from established chemical and automotive-adjacent players to major battery makers, shows zero filings in the latest year, and at least one shows a full -100% year-over-year drop. That is consistent with the plateau seen in the aggregate trend, not with any single company pulling ahead.
A long tail behind a thin cluster of active names
With only 38 families across the full coverage window and co-assignee pairs concentrated among a handful of individuals, this landscape looks like a specialist niche rather than a crowded battleground — useful context before assuming any single player has locked up the space.
Filing strategy spans multiple jurisdictions without a single dominant office
No single receiving office holds a majority of filings, which means freedom-to-operate work here cannot be confined to one jurisdiction's register — a clearance search limited to China or the US alone would miss roughly half of this landscape.
| Assignee | Recent year | YoY |
|---|---|---|
| Gillette Company | 0 | — |
| Phostech Lithium Inc. | 0 | — |
| LG Energy Solution, Ltd. | 0 | -100% |
| Contemporary Amperex Technology Co., Ltd. (CATL) | 0 | — |
| National Petroleum Company | 0 | — |
| PINNELL LESLIE J | 0 | — |
| NANJUNDASWAMY KIRAKODU S | 0 | — |
| KAPLAN ALEXANDER | 0 | — |
Turning this landscape into a filing or clearance decision
The trend and rankings above answer where the field has been. Two follow-on questions decide what to do next.
Check freedom-to-operate against the 2009 lineage
Any new thick-electrode or energy-density claim should be tested against the highest-cited cathode-material family in this set before drafting, since it still anchors much of the surrounding claim space.
Run a clearance searchScope a first claim in the under-claimed branches
The gate chips above point to areas with thinner filing density — silicon-doped anode co-design and fast-charge electrolyte ratios among them — worth scoping before assuming they are occupied.
Draft a claim scopeCommon questions about this landscape
This landscape covers patent families that combine lithium iron phosphate (LFP or LiFePO4) chemistry terms with cell-design language — thick-electrode architectures, cell-design claims broadly, and the energy-power balance trade-off — rather than LFP chemistry claims generally. It is filtered by IPC classes covering batteries and cells, plus computation-aided design classes, so it captures both physical electrode-design patents and simulation-adjacent filings. A plain LFP chemistry search without the design-optimization terms would return a much larger and less focused set.
Filing volume in this dataset rose to a peak of 6 in 2022 and has not exceeded that level since, which reads as a plateau rather than continued growth. This can happen when the core design claims — electrode thickness ratios, areal density targets, basic energy-power trade-off framing — get staked out early, after which further filing shifts to narrower refinements rather than new foundational claims. It is also worth treating the most recent one to two years with caution, since publication lags filing by roughly 18 months and those counts are still incomplete.
The recent-year momentum data in this landscape shows every tracked named assignee, including major battery and materials companies, at zero filings in the latest tracked year, with at least one showing a full year-over-year drop to zero. That does not mean these companies have exited the space; the latest year is partial due to publication lag, and momentum can look flat simply because recent filings have not yet published. It does mean no single company is currently visibly accelerating ahead of the others in this specific claim set.
Based on the IPC composition and filing density in this dataset, several adjacent branches carry thinner claim coverage than the core cathode-material cluster: silicon-doped anode combined with thick-cathode co-design, electrolyte additive ratios tuned specifically for fast-charge LFP cells, and simulation-based energy-power balance modelling under the G06F30 computation-aided-design class. These are starting points for scoping a claim, not confirmed clear ground — a full clearance search against the highest-cited records is still necessary before filing.
Citation counts in this dataset are useful but skewed toward older filings simply because they have had more time to accumulate citations within the searched corpus. The most-cited record here dates to 2009, and a related 2010 filing on the same underlying invention also ranks highly — that reflects historical influence on how cathode-material claims were framed, not necessarily current commercial relevance. Newer filings, including the 2026 representative record in this set, should be evaluated on claim scope and technical merit rather than citation count alone.
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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.