Solid-State Battery Patent Landscape 2026
Solid-State Battery Patent Landscape in 2026
The solid-state battery patent field is in a sustained growth phase, with Toyota holding a commanding lead of 2,077 patent families and the top five applicants collectively accounting for 73% of the leading filers’ combined total. Activity is heavily concentrated among Japanese and Korean automotive and electronics conglomerates, with Korean battery makers showing the sharpest recent momentum.
Toyota leads a highly concentrated field dominated by Japanese and Korean incumbents
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 1 | Toyota Motor Corporation | 2,077 | |
| 2 | Panasonic Intellectual Property Management (Panasonic) | 1,579 | |
| 3 | LG Energy Solution | 804 | |
| 4 | Samsung SDI | 759 | |
| 5 | Samsung Electronics (Korea) | 501 | |
| 6 | Fujifilm Corporation | 454 | |
| 7 | Murata Manufacturing Co., Ltd. | 442 | |
| 8 | Hyundai Motor Company | 418 | |
| 9 | Idemitsu Kosan Co., Ltd. | 414 | |
| 10 | LG Chem | 391 |
Filing volumes are still rising on a multi-year basis with technology concentrated in core battery IPC classes
Annual filing data and technology-branch composition together reveal both the pace of competition and the degree to which the field remains anchored in electrochemical cell fundamentals versus adjacent material-science branches.Annual filing trend
Recorded filings grew from 853 families in 2017 to a visible peak of 2,143 in 2023, with a 14% net gain across the recent window. The 2024 and 2025 figures are materially under-counted due to publication lag and should not be read as a slowdown; the lifecycle evidence indicates the field remains in a growth stage. 2026 data (24 families recorded) represents only partial-year visibility.
Annual values from 2017 to 2026, peaking at 2,143 in 2023.85320171,17920181,60820191,87020201,93320212,06720222,14320231,98320241,1962025242026↗ Hover for values · click a bar to ask EurekaTechnology composition
H01M (Batteries, cells & fuel cells) dominates at the patent-record level with 19,831 records — far exceeding all other classes. The second-largest branch, H01B (Cables, conductors & insulators), at 2,901 records, reflects intense work on solid electrolyte conductor materials. Inorganic chemistry classes C01B and C01G, ceramics class C04B, and capacitor class H01G each carry hundreds of records, indicating that upstream materials innovation is a meaningful secondary front. Polymer-related classes (C08L, C08G, C08F) are present but relatively sparse, pointing to a field that currently skews toward inorganic electrolyte systems.
H01M · Batteries, cells & fuel cells leads with 19,831; H01B · Cables, conductors & insulators 2,901.H01M · Batteries, cells …19,831H01B · Cables, conductor…2,901C01B · Non-metallic elem…1,490C01G · Compounds of othe…1,173C04B · Ceramics, cement …654H01G · Capacitors618C08L · Polymer compositi…395C08G · Condensation poly…356↗ Hover for values · click a bar to ask EurekaFoundational and most-cited patents
The most-cited families that anchor this space — hover a row and click to open it in Eureka.Oxide solid electrolyte coated ni-based cathode fo…
A sulfide all-solid-state battery and a method for forming an oxide electrolyte coated cathode is provided. The battery includes a nickel-based cathode, an electrolyte coating adhered to the nickel-based cathode, an anode, and a sulfide solid electrolyte. The nickel-based cathode includes… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Solid electrolyte material, and cell | 516 |
| 2 | Electroactive high storage capacity polyacetylene-… | 394 |
| 3 | Electroactive high storage capacity polycarbon-sul… | 392 |
| 4 | Composite solid electrolyte for protection of acti… | 388 |
| 5 | Reversible electrode material | 372 |
| 6 | Solid polymer electrolytes | 348 |
| 7 | Sulfide solid electrolyte material, battery, and m… | 340 |
| 8 | Rechargeable thin film battery and method for maki… | 336 |
Ranked by total forward citations. Citation counts accrue over time, so this list favours older, broadly-cited patents and may include general-purpose work beyond the specific topic; treat it as foundational context rather than a current-activity ranking.
What the patent structure means for R&D strategy and market entry
The combination of lifecycle stage, applicant concentration, active co-filing networks, and geographic distribution shapes where new entrants can realistically compete and where incumbents are most defensible.Growth stage: filings still expanding on a multi-year basis
The lifecycle evidence classifies solid-state batteries as a Growth-stage field: annual filings increased 14% across the recent window and the most recent years are understated by publication lag. This means the competitive window has not yet closed — but the incumbents’ large portfolio leads make differentiated positioning on electrolyte chemistry or cell architecture more effective than head-on volume competition.
Growth stageTop-heavy field with a widening gap between tier one and tier two
The top five filers account for 73% of the leading filers’ combined total, and Toyota alone holds 2,077 families versus Samsung Electronics’ 501 at fifth place. This concentration makes freedom-to-operate analysis essential before entering any of the core H01M10 sub-classes. Challengers accelerating rapidly — Samsung SDI at 3.4× and LG Energy Solution at 3.1× their prior three-year rates — are narrowing the gap, but from a smaller base.
High concentrationAutomaker–university and intra-group co-filing partnerships dominate the ecosystem
The most active co-filing pair is Hyundai Motor Company and Kia Corporation (364 joint families), reflecting tight intra-group integration. Toyota has filed jointly with Panasonic (106 families) and Tokyo Institute of Technology (66 families), signalling an industry–academia model for fundamental electrolyte research. LG Energy Solution’s 95-family collaboration with the Regents of the University of California is notable as a cross-continental academic tie. Samsung SDI and Samsung Electronics share 48 joint families, while Hyundai also co-files with Hanyang University (50 families) and Seoul National University R&DB Foundation (21 families).
Active co-filingUS office leads at the patent-record level; EPO and PCT coverage reflects global commercial intent
At the patent-record level, the United States leads with 10,534 records, followed by the EPO at 5,601 and WIPO PCT at 3,072. This pattern reflects applicants’ prioritization of the US market for litigation and licensing, with European and PCT filings used to preserve optionality in commercial markets. Canada (361), Australia (200), and the UK (188) show meaningful but secondary coverage.
US-led, globally filedGo 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 |
|---|---|---|
| Hyundai Motor Company | Kia Corporation | 364 |
| Toyota Motor Corporation | Panasonic Corporation | 106 |
| LG Energy Solution, Ltd. | Regents of the University of California | 95 |
| Toyota Motor Corporation | Tokyo Institute of Technology | 66 |
| Hyundai Motor Company | Hanyang University | 50 |
| Samsung SDI Co., Ltd. | Samsung Electronics Co., Ltd. | 48 |
| Samsung Electronics Co., Ltd. | Corning Incorporated | 28 |
| Samsung Electronics Co., Ltd. | Massachusetts Institute of Technology | 21 |
| Hyundai Motor Company | Seoul National University R&DB Foundation | 21 |
| Toyota Motor Corporation | National Institute for Materials Science (NIMS) | 17 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
Toyota dominates; Korean battery makers show the sharpest recent acceleration
The two largest filers differ substantially in trajectory: Toyota continues to expand its already dominant position, while Samsung SDI and LG Energy Solution are closing the gap at multiples of their prior filing rates. Panasonic Intellectual Property Management, despite its large absolute portfolio, is contracting.Toyota Motor Corporation
Toyota holds the largest portfolio with 2,077 patent families, concentrated almost entirely in H01M core battery and electrode classes (H01M10: 1,827 records; H01M4: 1,382 records). Recent filings are up 47% versus the prior three-year period, meaning Toyota is not only defending its lead but actively widening it. Co-filing relationships with Panasonic and Tokyo Institute of Technology suggest a dual track: manufacturing scale-up and fundamental materials research.
families: 2,077Samsung SDI
Samsung SDI ranks fourth overall with 759 patent families but is the fastest-growing major incumbent on a relative basis, with recent filings at 3.4× its prior three-year rate. Its technology focus mirrors the field’s core (H01M10: 710 records; H01M4: 579 records), and its 48-family co-filing overlap with Samsung Electronics creates an integrated intra-group position spanning cell chemistry and device integration. At current trajectory, Samsung SDI is positioned to close the gap with the top-two filers within the next filing cycle.
families: 759| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| LG Energy Solution, Ltd. | 537 | ▲ 3.1× vs prior 3-yr |
| Samsung SDI Co., Ltd. | 470 | ▲ 3.4× vs prior 3-yr |
Under-served branches adjacent to the dominant H01M core
Several IPC classes appear at the patent-record level with relatively low record counts compared to H01M, despite clear technical adjacency to solid-state battery development. These represent observations of relative sparsity, not validated market opportunities.C04B · Ceramics, cement & refractories
With 654 patent records, the ceramics class is sparse relative to H01M’s 19,831, yet ceramic processing is central to oxide solid electrolytes (e.g., LLZO, NASICON-type materials) where sintering conditions directly determine ionic conductivity. The sparsity may reflect that ceramic processing IP is embedded in H01M claims rather than filed under C04B — or it may signal a genuine gap in manufacturing-process protection. Entrants with ceramic processing expertise could explore C04B-anchored claims on sintering atmospheres, dopant profiles, and co-firing with electrode layers.Search this in Eureka →C08L / C08G · Polymer compositions & condensation polymers
Polymer electrolyte records total 395 (C08L) and 356 (C08G) — a small fraction of the field’s record base — despite polymer solid electrolytes being a distinct commercialization pathway for flexible and wearable applications. The dominant players’ technology profiles skew heavily toward inorganic electrolytes, suggesting the polymer electrolyte branch is less contested among the largest filers. Organizations with polymer chemistry expertise may find fewer blocking positions here, particularly in composite polymer–ceramic hybrid systems, though entry would require validating freedom-to-operate against existing H01M claims that may already cover polymer electrolyte formulations.Search this in Eureka →How leading filers differ in their technology-route 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 | H01B 1 · Cables, conductors & insulators | H01M 6 · Batteries, cells & fuel cells |
|---|---|---|---|---|---|
| Samsung SDI Co., Ltd. | Strong — 710 | Strong — 579 | Emerging — 115 | Absent | Absent |
| LG Energy Solution, Ltd. | Strong — 788 | Strong — 482 | Emerging — 100 | Absent | Absent |
