LFP In-Situ Characterization Patents: Leaders, Trends & Gaps 2026
- Zero to seven in three years. Filings sat at zero through 2022 and jumped to a peak of seven families in 2025 — this is a field still forming, not one with settled precedent.
- India leads filing volume, not China or the US. India accounts for 8 of the tracked receiving-office filings, ahead of China (4), the United States (3) and the EPO (2).
- Claim territory sits almost entirely inside H01M. All 17 families classify under batteries and cells, while robotics, aircraft-ground infrastructure and electrical-measurement classes each show only a handful of records — the visible edge of the white space.
Top-5 share is the combined record count of the five largest assignees divided by all 17 records in scope (CR5), not by the ranked leaders only.
A newly forming corner of battery patenting
Patents combining lithium iron phosphate chemistry with operando or real-time measurement methods form a small, recent dataset: 17 patent families in total, with filing activity essentially flat until the early 2020s and a peak of seven families reached in 2025. Every record classifies under H01M (batteries, cells and fuel cells), confirming this is core battery-cell subject matter rather than adjacent instrumentation repurposed for the job.
The technology composition tapers off sharply outside that core class. Secondary classifications spanning power systems, robotics, aircraft ground infrastructure, inorganic compounds and electrical measurement each register only a handful of records, marking the outer boundary of where in-situ LFP monitoring claims currently extend. Because publication lags filing by roughly 18 months, the most recent year's count is understated — the true trajectory is likely still rising.
Let an AI agent run this analysis on your own technology
Pick a task. Every answer cites the patents behind it.
Filing trends and technology composition
The filing curve and IPC spread below show a technology area that has only recently started generating patent activity, concentrated almost entirely within core battery classifications.
Filings accelerate late, starting from zero
Filings were essentially absent through the mid-2010s and stayed at zero as recently as the 2022 midpoint, then rose to a peak of seven families in 2025. The 2026 figure of two is partial and will understate final filing volume once publication catches up, given the roughly 18-month lag between filing and publication.
Concentration in H01M, with a thin secondary spread
All 17 records carry an H01M classification, confirming this is core battery-cell subject matter. Secondary classes — H02J power systems, B25J robotics, B64F aircraft ground infrastructure, C01B inorganic compounds, G01R measurement, H04L data transmission and a single A47L record — appear in single digits, marking the outer edge of where in-situ LFP monitoring claims currently reach.
Shares are the percentage of the 17 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 In-Situ Characterization with Eureka
This page is one run against one query. Ask Eureka your own question about lithium iron phosphate battery in-situ characterization and every answer comes back with the patent numbers behind it.
Try EurekaA representative recent filing
Lithium iron phosphate precursor and high-press-density cathode material
A lithium iron phosphate precursor prepared by uniformly mixing a metal oxide, dispersant, carbon source and lithium source with a first lithium iron phosphate in aqueous solution, grinding to a median particle diameter of 0.35 to 0.39 µm, then adding a second lithium iron phosphate, remixing and re-grinding to the same particle-size window. The process is described as avoiding repeated replacement of materials, reaction environments or equipment across the two stages.Filed 2026-07-29 by Advanced Lithium Electrochemistry Co., Ltd. — the newest record in this dataset.
Put your own technology through the same analysis
Eureka on the web
When you want the answer in the next five minutes.
The agent works the prompt against patents and technical literature, citing every source.
Run your analysis now →MCP server & REST API
When it has to run inside your own pipeline.
Patent search, landscape analysis and assignee resolution as MCP tools. Drop them into any agent framework, or call REST directly.
Browse MCP servers →What the filing pattern signals
Three figures from this dataset matter more than the raw count: when filings started, where they concentrate technically, and who is filing together.
Growth is recent and still accelerating
The midpoint year of 2022 recorded zero filings; by 2025 that had risen to seven, the peak so far. The partial 2026 figure of two will rise once publication catches up with filing, given the typical 18-month lag.
Core claim space is fully occupied, edges are not
Every record in this dataset carries an H01M classification. Secondary classes — H02J, B25J, B64F, C01B, G01R, H04L, A47L — appear only in single digits, marking where claim density drops off sharply.
India outpaces China and the US here
India's 8 tracked filings exceed China's 4, the US's 3 and the EPO's 2, an unusual distribution for battery-materials patenting that typically skews toward China and the US.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to lithium iron phosphate battery in-situ characterization, with the prior art for and against each one.
| Assignee | Co-assignee | Shared families |
|---|---|---|
| State Grid Liaoning Electric Power Co., Ltd. Jinzhou Power Supply Company | State Grid Corporation of China | 2 |
| SURYA SWAROOP TAMARAPALLI | NAVEEN KUMAR GAVARA | 1 |
| ST JOSEPHS COLLEGE OF ENG | PAVITHRA P | 1 |
| ST JOSEPHS COLLEGE OF ENG | NAVEENA S K | 1 |
| ST JOSEPHS COLLEGE OF ENG | BALASUBRAMANIAN V | 1 |
Only 5 co-assignee pairs appear across the dataset, the strongest being a Chinese grid-utility pairing filing together twice — a sign that most activity here is still solo-filed rather than joint-venture driven.
Who is filing, and where the activity concentrates
With only 17 families and 5 co-assignee pairs, this is not yet a field with an entrenched leader — filing activity is spread across research institutions, a Chinese grid utility, and individual company filers, several of which show a single filing in the latest year.
Grid-utility co-filing stands out
State Grid Liaoning Electric Power Co., Ltd. Jinzhou Power Supply Company (a State Grid subsidiary) and State Grid Corporation of China form the strongest co-assignee pair in the dataset, filing together twice — the only pairing with more than one joint filing.
Advanced Lithium Electrochemistry Co., Ltd. (ALEEES) shows fresh activity
This Taiwanese lithium-electrochemistry firm registered a filing in the latest year tracked, placing it among the small group of assignees still actively filing as the dataset's coverage window closes.
ST JOSEPHS COLLEGE OF ENG is newly active
An academic institution appears with a fresh filing in the latest year, paired with an individual co-inventor (PAVITHRA P) — consistent with India's lead in receiving-office filings for this topic.
| Assignee | Recent year | YoY |
|---|---|---|
| Advanced Lithium Electrochemistry Co., Ltd. (ALEEES) | 1 | — |
| ST JOSEPHS COLLEGE OF ENG | 1 | — |
| TOWFLEXX MILTECH INC | 0 | -100% |
| State Grid Liaoning Electric Power Co., Ltd. Jinzhou Power Supply Company | 0 | — |
| State Grid Corporation of China | 0 | — |
| BATX ENERGIES PVT LTD | 0 | — |
| Shenzhen BAK Power Battery Co., Ltd. | 0 | — |
| Anhui Jingying Technology Service Co., Ltd. | 0 | -100% |
Where to take this analysis
This landscape captures an early-stage, thinly filed corner of battery patenting. The next steps depend on whether you're clearing freedom-to-operate or scouting where to file next.
Check freedom-to-operate against the featured filing
If your process involves sequential grinding or narrow particle-size targeting for LFP precursor material, compare your parameters directly against EP4782397A1's claimed D50 window before finalizing a manufacturing route.
Run a claim comparison in EurekaTrack the 2025-2026 filing surge as it publishes
Given the 18-month publication lag, several 2025 and 2026 filings relevant to this topic have likely not yet appeared in this dataset. Set up monitoring to catch them as they publish.
Set up filing alerts in EurekaExplore the under-claimed adjacent branches
Robotics, aircraft ground infrastructure and sensor-fusion measurement each show only a handful of records against a saturated H01M core — these are the areas with the most room for a strong first claim.
Explore white space in EurekaCommon questions on LFP in-situ characterization patents
In this context it refers to methods and apparatus for observing a lithium iron phosphate cell's structural or chemical state while the cell is operating, rather than after disassembly. Typical approaches referenced in the search terms include operando XRD, in-operando imaging, and real-time monitoring techniques tied to electrode or electrolyte behaviour during charge and discharge. The patents in this space classify almost entirely under H01M (batteries and cells), with G01N23/20 covering the X-ray diffraction measurement angle specifically. Because the underlying chemistry changes rapidly under load, being able to observe it live rather than post-mortem is the core value these filings protect.
The dataset used for this landscape contains 17 patent families published between 2015 and mid-2026, all classified under H01M. That is a small, emerging corpus rather than a mature one — filing activity stayed at zero through the early-2020s midpoint and only picked up meaningfully in the peak year of 2025, when seven families were filed. Readers should treat this as an early-stage field where claim territory is still being staked out, not one with decades of settled precedent.
Growing, based on the filing trend: activity was flat at zero as recently as 2022 and then rose to a peak of seven families in 2025, indicating accelerating rather than declining interest. The 2026 count is partial and, because publication typically lags filing by about 18 months, understates the true current filing rate. Taken together the trend points to increasing attention on live monitoring of LFP cells rather than a technology past its peak.
Among the receiving offices captured in this dataset, India leads with 8 filings, followed by China with 4, the United States with 3, and the European Patent Office with 2. That distribution suggests a meaningful share of activity is coming from research-institution and university filers in India alongside the more commercially concentrated Chinese and US activity typical of core battery-materials patenting. It is a smaller, more geographically distributed set than what you'd see in mainstream LFP cathode-material filings.
EP4782397A1, filed by Advanced Lithium Electrochemistry Co., Ltd. on 2026-07-29, claims a lithium iron phosphate precursor and cathode material made through a two-stage mixing and grinding process targeting a narrow median particle diameter (D50 0.35 to 0.39 µm) for high press-density material. It is a materials and manufacturing-process claim, not an in-situ characterization claim, so it does not block operando XRD, real-time imaging, or other live-monitoring methods. Its practical relevance is limited to teams producing LFP precursor material via a similar sequential-grinding approach landing in that same particle-size window.
Research Lithium Iron Phosphate Battery In-Situ Characterization in depth with Eureka
Go past this page: query the whole lithium iron phosphate battery in-situ characterization corpus yourself, in your own scope.
Every answer comes back with patent numbers you can open.
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.