Semi-Solid Battery Patent Landscape 2026
Semi-Solid Battery Patent Landscape in 2026
The semi-solid battery IP field is in an active growth phase, with 519 patent families on record and a 102% increase over the recent measurement window. 24M Technologies holds the largest position with 100 patent families, but LG Energy Solution is closing ground rapidly as a new entrant with 87 families, signalling a shift from a pioneer-dominated field toward broader multi-player competition.
24M Technologies leads a moderately concentrated field facing fresh challengers
24M Technologies ranks first with 100 patent families, followed by LG Energy Solution at 87 and Beijing Welion New Energy Technology at 37. The top five filers — 24M Technologies, LG Energy Solution, Beijing Welion, California Institute of Technology, and SVOLT Energy Technology — together account for 50% of the combined output of the hundred largest filers, indicating a moderately concentrated competitive structure.
A notable tier gap separates the top two from the rest: the third-ranked applicant holds fewer than half the families of the second. Below the top five, applicants cluster between 32 and 5 patent families, forming a broad mid-tier of Chinese battery makers, Korean conglomerates, and academic institutions.
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 1 | 24M Technologies Inc | 100 | |
| 2 | LG Energy Solution Ltd | 87 | |
| 3 | Beijing Welion New Energy Technology Co Ltd | 37 | |
| 4 | California Institute of Technology | 36 | |
| 5 | SVOLT Energy Technology Co Ltd | 32 | |
| 6 | Samsung SDI Co Ltd | 18 | |
| 7 | Shenzhen TXD Technology Co Ltd | 16 | |
| 8 | Hefei Guoxuan High-Tech Power Energy Co Ltd | 13 | |
| 9 | Toyota Motor Corporation | 12 | |
| 10 | Shenzhen BTR New Energy Technology Research Institute Co Ltd | 10 |
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 11 | GM Global Technology Operations LLC | 10 | |
| 12 | Stanford University | 9 | |
| 13 | BYD Co Ltd | 8 | |
| 14 | KOREA ADVANCED INST OF SCI & TECH | 8 | |
| 15 | Wanxiang 123 Co Ltd | 7 | |
| 16 | Shanghai Xuanyi New Energy Development Co Ltd | 6 | |
| 17 | Termo Industries SA | 6 | |
| 18 | CATARC New Energy (Tianjin) Battery Technology Co Ltd | 6 | |
| 19 | NGK Insulators Ltd | 6 | |
| 20 | The Japan Steel Works Ltd | 5 |
24M Technologies’ deep portfolio, anchored in electrochemical cell architecture and electrode engineering, reflects its foundational role in semi-solid battery architecture. LG Energy Solution’s rapid entry with 87 families signals that major battery manufacturers are now treating semi-solid technology as a strategic rather than exploratory priority.
Filings from roughly 2024 onward are subject to publication lag and likely understate current activity; the 2025–2026 figures should be treated as partial counts. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Sustained multi-year growth dominated by core battery engineering IP
Annual filing volume and the technology branch mix together reveal both the pace of expansion and the degree to which innovation remains concentrated in electrochemical cell fundamentals versus adjacent material and processing disciplines.
Annual filing trend
Filings were minimal before 2019, then accelerated sharply through 2020 and sustained a high plateau through 2023, which registered the highest annual count in the dataset. The 2024 and 2025 figures remain below the 2023 peak, but given standard publication lag of 18–24 months, these recent-year counts are understated and should not be read as a real slowdown.
↗ Hover for values · click a bar to ask EurekaTechnology composition
H01M (batteries, cells, and fuel cells) is overwhelmingly dominant, confirming that innovation centres on cell chemistry and architecture. The next-largest branches — H01G (capacitors), C08F (addition polymers), C07F (organo-metallic compounds), and C08G (condensation polymers) — each represent a small fraction of activity, pointing to limited but non-trivial adjacent work in polymer electrolytes and inorganic compounds.
↗ Hover for values · click a bar to ask EurekaHighly cited patent families surfaced by the query
Citation-heavy patent families returned by the query. Use this section as citation context, not as a curated list of the most topic-specific patents.
HALBFESTER BATTERIEELEKTROLYTVORLÄUFER, HALBFESTER…
A semi-solid battery electrolyte precursor, a semi-solid battery electrolyte, a semi-solid battery, and a preparation method of the semi-solid battery are provided. The semi-solid battery electrolyte precursor includes a first polymer monomer, a second polymer monomer, and an initiator. The first polymer monomer is an acrylic acid monomer or an acrylate… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Electrochemical Energy Storage Systems and Methods | 218 |
| 2 | Semi-solid electrode cell having a porous current … | 212 |
| 3 | Stationary semi-solid battery module and method of… | 187 |
| 4 | Electrochemical separators with inserted conductiv… | 181 |
| 5 | Asymmetric battery having a semi-solid cathode and… | 165 |
| 6 | Part solid, part fluid and flow electrochemical ce… | 161 |
| 7 | Electrochemical slurry compositions and methods fo… | 142 |
| 8 | Methods for electrochemical cell remediation | 138 |
Ranked by total forward citations. Citation counts favour older and broadly cited patent families, and broad or adjacent patents may appear when they match the search scope. Treat this section as citation context, not as a curated list of the most topic-specific patents. Some patent titles may be shown in their original, non-English language where an accurate translation could not be guaranteed.
What the competitive structure means for R&D investment decisions
Four structural features — lifecycle stage, concentration, collaboration patterns, and geographic spread — define the strategic environment for any entrant or incumbent evaluating semi-solid battery IP.
Growth stage: annual volume expanding on a multi-year basis
The field is classified as Growth, with a 102% increase in patent families over the recent measurement window and annual filings still rising per the lifecycle assessment. The 2023 peak of 107 filings represents the highest single-year count in the dataset. Entrants have a narrowing but still meaningful window to establish foundational positions before the field transitions toward maturity.
Growth stageModerate concentration with a sharp two-player lead
The top five filers hold 50% of the combined output of the hundred largest filers, with 24M Technologies and LG Energy Solution together accounting for a disproportionate share of that block. The mid-tier — between roughly 8 and 37 patent families — is populated by Chinese industrial players, Korean battery makers, and US academic institutions, offering several plausible acquisition or licensing targets for firms seeking rapid portfolio entry.
Moderate concentrationLG Energy Solution is the most active co-filer
LG Energy Solution has co-filed with Korea Advanced Institute of Science and Technology (8 joint patent families) and with the Regents of the University of California (2 joint families). Samsung SDI has one recorded co-filing with Sogang University Research and Business Development Foundation. Collaboration activity is currently sparse beyond LG Energy Solution, suggesting that the broader applicant field is largely filing independently.
Limited co-filingChina leads filings; the US and Europe are strong secondary markets
China is the leading filing office, followed by the United States and the European Patent Office. India appears as a notable fourth jurisdiction, ahead of WIPO PCT and Japan. The geographic spread across major automotive and electronics markets — including Germany, Canada, South Korea, and Australia — indicates that leading applicants are pursuing broad international protection, raising the cost of freedom-to-operate for late entrants.
China-led, multi-jurisdictionalGo beyond the landscape: Eureka’s TRIZ Solution agent breaks down an R&D problem and returns patented concept solutions, each with a technical approach and cited patent & literature evidence.
| Applicant | Collaborator | Co-filings |
|---|---|---|
| LG Energy Solution Ltd | Korea Advanced Institute of Science and Technology | 8 |
| LG Energy Solution Ltd | Regents of the University of California | 2 |
| Samsung SDI Co Ltd | SOGANG UNIV RES & BUSINESS DEV FOUND | 1 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
24M Technologies and LG Energy Solution set the pace from different technology angles
The two leading applicants differ meaningfully in trajectory and technical emphasis: 24M Technologies is a deep-rooted incumbent whose recent filing pace has moderated, while LG Energy Solution has emerged as a new entrant with a fast-accumulating portfolio.
24M Technologies
24M Technologies holds 100 patent families, the largest position in the corpus. Its technical focus is concentrated in electrode engineering (H01M 4, 88 records) and cell-level electrochemistry (H01M 10, 63 records), with secondary coverage in fuel cell systems (H01M 8, 24 records). Recent filing momentum shows a 46% decline versus the prior period, consistent with a maturing foundational portfolio rather than active expansion. The eight most-cited patents in the corpus — covering electrochemical energy storage systems, semi-solid electrode cell architectures, stationary battery modules, and electrochemical separators — are closely associated with 24M’s technology lineage.
patent families: 100LG Energy Solution
LG Energy Solution holds 87 patent families and is classified as a new entrant in the recent filing window, with 65 families filed in the recent period — the highest absolute recent-period count of any tracked applicant. Its technical emphasis spans cell electrochemistry (H01M 10, 77 records), electrode materials (H01M 4, 43 records), and condensation polymer chemistry (C08G 65, 15 records), the last suggesting active work on polymer electrolyte formulations. This breadth, combined with its academic collaboration with KAIST and UC, positions LG Energy Solution as the most active challenger to 24M’s incumbent position.
patent families: 87| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| 24M Technologies Inc | 13 | ▼ -46% |
| LG Energy Solution Ltd | 65 | ▲ new entrant |
| Beijing Welion New Energy Technology Co Ltd | 1 | ▼ -97% |
| SVOLT Energy Technology Co Ltd | 11 | ▼ -45% |
| California Institute of Technology | 2 | ▲ new entrant |
| Samsung SDI Co Ltd | 12 | ▲ new entrant |
| Hefei Guoxuan High-Tech Power Energy Co Ltd | 6 | ▲ new entrant |
| Toyota Motor Corporation | 1 | ▲ new entrant |
Under-served adjacent branches in polymer chemistry and organo-metallic compounds
Outside the dominant H01M battery-engineering branch, several IPC classes have measurable but sparse patent activity. These represent adjacent technical areas where coverage is thin relative to their plausible relevance to semi-solid battery development.
C08F · Addition polymers (vinyl-type)
This branch holds 28 patent records, representing about 3% of the technology mix. Addition polymers are technically relevant to binder systems, gel polymer electrolytes, and separator coatings in semi-solid cell architectures. The sparse filing count suggests that systematic polymer-engineering work for semi-solid battery applications remains underdeveloped relative to cell-level IP. Entrants with polymer synthesis expertise could differentiate by targeting binder and electrolyte formulations that are not yet covered by the dominant cell-architecture portfolios.
Search this in Eureka →C07F · Organo-metallic and non-carbon inorganic compounds
With 23 patent records and a 3% share, this branch covers organo-metallic and non-carbon inorganic chemistry, relevant to lithium-salt synthesis, cathode precursor preparation, and electrolyte additive development for semi-solid systems. Beijing Welion New Energy Technology shows notable activity here (C07F 5 and C07F 7), suggesting one applicant has identified a gap. The branch remains lightly contested overall, and coordinated filing in organo-metallic electrolyte chemistry could represent a defensible adjacent position for materials-focused entrants.
Search this in Eureka →How leading applicants differ by technology sub-class emphasis
Strength of each leader across the main technology routes.
| Player | H01M 10 · Batteries, cells & fuel cells | H01M 4 · Batteries, cells & fuel cells | H01M 50 · Batteries, cells & fuel cells | H01M 8 · Batteries, cells & fuel cells | H01G 11 · Capacitors |
|---|---|---|---|---|---|
| 24M Technologies Inc | Strong · 63 | Strong · 88 | Absent | Moderate · 24 | Moderate · 21 |
| LG Energy Solution Ltd | Strong · 77 | Strong · 43 | Emerging · 4 | Absent | Absent |
| California Institute of Technology | Strong · 29 | Strong · 25 | Strong · 21 | Strong · 18 | Moderate · 13 |
| SVOLT Energy Technology Co Ltd | Strong · 32 | Strong · 20 | Emerging · 5 | Absent | Absent |
| Beijing Welion New Energy Technology Co Ltd | Strong · 37 | Absent | Absent | Absent | Absent |
| Samsung SDI Co Ltd | Strong · 10 | Strong · 15 | Absent | Absent | Absent |
Frequently asked questions
The in-scope corpus contains 519 patent families, covering global filings analysed through PatSnap Eureka. Recent filings from roughly 2024 onward are subject to publication lag and likely understate current activity.
24M Technologies holds the largest position with 100 patent families, focused on electrode engineering and cell-level electrochemical architecture. LG Energy Solution is the closest challenger at 87 patent families and is the most active filer in the recent period.
The field is assessed as Growth stage, with a 102% increase in patent families over the recent measurement window and annual filings still rising. The 2023 peak of 107 annual filings is the highest on record.
China leads with 205 patent records, followed by the United States (169), Europe via the EPO (116), India (43), and WIPO PCT (28). Japan, Germany, Canada, and South Korea also have measurable coverage.
LG Energy Solution is the most active co-filer: it has 8 joint patent families with Korea Advanced Institute of Science and Technology and 2 with the Regents of the University of California. Samsung SDI has 1 joint filing with Sogang University Research and Business Development Foundation. Collaboration beyond these pairs is sparse.
The most-cited patents cover: Electrochemical Energy Storage Systems and Methods (218 citations), Semi-solid electrode cell having a porous current collector (212), Stationary semi-solid battery module and method (187), Electrochemical separators with inserted conductors (181), and Asymmetric battery having a semi-solid cathode (165). These are closely associated with foundational semi-solid electrode and cell architecture innovations.
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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.