Lithium-Ion Battery Patent Landscape 2026
Lithium-Ion Battery Patent Landscape in 2026
The lithium-ion battery patent field is mature and highly concentrated, with a small group of Korean, Chinese, and Japanese manufacturers dominating filings across cell chemistry, electrode design, and pack architecture. Annual volume peaked in 2022 and has eased since, consistent with a field approaching saturation in its core technical branches.
LG Energy Solution leads a tightly held field with three tiers of competitors
LG Energy Solution holds the top position in applicant rankings, followed by Samsung SDI and CATL (Hong Kong entity), with Toyota and Ningde Amperex rounding out the top five. The top five filers collectively account for thirty percent of the hundred largest filers’ combined total, signaling meaningful but not extreme concentration at the summit.
A clear tier gap separates the top five — each with substantial patent record counts — from mid-tier players such as BYD, Panasonic, Robert Bosch, and LG Chem. A third tier of Chinese materials specialists, automakers, and component firms fills the rankings down to rank twenty.
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 1 | LG Energy Solution Ltd. | 6,431 | |
| 2 | Samsung SDI Co., Ltd. | 5,162 | |
| 3 | Contemporary Amperex Technology (Hong Kong) Limited | 4,969 | |
| 4 | Toyota Motor Corporation | 4,270 | |
| 5 | Ningde Amperex Technology Ltd. | 3,449 | |
| 6 | Contemporary Amperex Technology Co., Ltd. | 2,508 | |
| 7 | BYD Co., Ltd. | 1,850 | |
| 8 | Panasonic Intellectual Property Management Co., Ltd. | 1,775 | |
| 9 | Robert Bosch GmbH | 1,675 | |
| 10 | LG Chem Ltd. | 1,641 |
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 11 | Samsung Electronics Co., Ltd. | 1,597 | |
| 12 | Hefei Guoxuan High-Tech Power Energy Co., Ltd. | 1,518 | |
| 13 | Zhuhai CosMX Battery Co., Ltd. | 1,465 | |
| 14 | GM Global Technology Operations LLC | 1,462 | |
| 15 | Nissan Motor Co., Ltd. | 1,405 | |
| 16 | Umicore | 1,013 | |
| 17 | Murata Manufacturing Co., Ltd. | 978 | |
| 18 | Tsinghua University | 884 | |
| 19 | Dongguan Amperex Technology Co., Ltd. | 841 | |
| 20 | Central South University | 810 |
The leaders’ positions reflect deep, sustained investment across core H01M battery and cell chemistry classes. Their scale creates high entry barriers in established electrochemical routes, but adjacent material science and system-integration branches remain comparatively less occupied, as discussed in the Adjacent Branches section.
Filing counts for 2024 and 2025 are under-counted due to typical patent publication lag of 18–24 months and should not be interpreted as a structural decline. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Filing activity peaked in 2022; core cell technology dominates the IPC mix
The annual filing trend and the IPC technology composition together reveal a field that built rapidly through the late 2010s, crested around 2022, and is now consolidating — while the vast majority of activity remains anchored in a single dominant technical class.
Annual filing trend
Annual filings grew steadily from 2017 through a 2022 peak, then eased in 2023. Counts for 2024 and 2025 are substantially under-reported due to publication lag and must not be read as a real decline; 2026 data is essentially incomplete.
↗ Hover for values · click a bar to ask EurekaTechnology composition
H01M (batteries, cells and fuel cells) accounts for the dominant share of IPC classifications, confirming that most innovation is concentrated in core cell and electrochemical design. Secondary branches — including C01B (inorganic compounds), C01G (metal compounds), H02J (power supply systems), and H01G (capacitors) — each represent a much smaller share, pointing to adjacent areas where patent density is lower.
↗ 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.
Lithium ion battery which can be implanted into an…
The invention discloses a lithium ion battery structure where an internal optical sensor can be implanted through an optical fiber. It is a battery sensing technology. A soft packed lithium-ion battery structure through which an internal optical sensor can be implanted through an optical fiber to monitor the changes of some specified parameters during the… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Implantable device with improved battery rechargin… | 983 |
| 2 | Si/C COMPOSITE MATERIAL, METHOD FOR MANUFACTURING … | 848 |
| 3 | Protection methods, protection circuits and protec… | 505 |
| 4 | Nano graphene reinforced nanocomposite particles f… | 502 |
| 5 | Medical device having lithium-ion battery | 468 |
| 6 | Stored energy and charging appliance | 445 |
| 7 | Nano graphene platelet-based composite anode compo… | 438 |
| 8 | Battery structures, self-organizing structures and… | 435 |
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 observations — maturity stage, applicant concentration, cross-company collaboration patterns, and geographic coverage — together define the strategic landscape any new entrant or incumbent must navigate.
Field is at plateau: annual volume eased from its 2022 peak
The lifecycle evidence places lithium-ion battery patenting at a mature stage, with annual filings having plateaued near their peak. On a multi-year basis the corpus remains large and active, but the 2022 peak has not been surpassed. For R&D teams, this signals that incremental improvements to established cell architectures face dense prior-art coverage; differentiation increasingly requires moving into adjacent technical branches or next-generation chemistries.
Mature / Post-peakTop five hold thirty percent of the top-hundred filers’ combined total
LG Energy Solution, Samsung SDI, CATL (Hong Kong), Toyota, and Ningde Amperex jointly represent thirty percent of the hundred largest filers’ combined patent records. This creates a formidable defensive perimeter in core cell technology. Mid-tier players — BYD, Panasonic, Robert Bosch, LG Chem — remain active but face meaningful gaps to the leaders. New entrants are most likely to find traction in under-covered branches rather than by competing head-on in H01M core classes.
High concentrationBTR New Material and Huizhou Dingyuan are the most active co-filers
The most active co-filing pair is BTR New Material Group and Huizhou Dingyuan New Energy Technology, with 123 joint filings — by far the strongest collaboration signal in the corpus. BYD co-files with Shenzhen Fangchengbao Automotive (31 filings), and Ningde Amperex Technology co-files with Dongguan Amperex Tech (23 filings). Cross-cultural collaborations include Robert Bosch with Samsung SDI (13 filings) and Robert Bosch with Shanghai Jiao Tong University (8 filings). Toyota also co-files with Kansai Paint and Zeon Corporation. These pairings suggest that materials supply-chain integration and OEM-supplier alignment are the dominant drivers of formal co-development.
Supply-chain drivenUnited States is the dominant filing jurisdiction; Europe and PCT follow
The United States is the leading jurisdiction by a wide margin, with Europe (EPO) and WIPO (PCT) as the next most significant venues. Canada and Australia represent secondary markets. Filings in Singapore, New Zealand, Philippines, and South Africa are sparse. This distribution indicates that protection strategies are overwhelmingly focused on the US, Europe, and PCT routes — giving entrants a relatively clearer path in smaller markets while confirming that freedom-to-operate concerns are sharpest in the US and Europe.
US-dominantGo 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 |
|---|---|---|
| BTR New Material Group Co., Ltd. | Huizhou Dingyuan New Energy Technology Co., Ltd. | 123 |
| BYD Co., Ltd. | Shenzhen Fangchengbao Automotive Sales Co., Ltd. | 31 |
| Ningde Amperex Technology Ltd. (ATL) | Dongguan Amperex Technology Co., Ltd. | 23 |
| Robert Bosch GmbH | Samsung SDI Co., Ltd. | 13 |
| Toyota Motor Corporation | Kansai Paint Co., Ltd. | 12 |
| Toyota Motor Corporation | Zeon Corporation | 11 |
| Toyota Motor Corporation | Toyota Motor Europe NV/SA | 9 |
| BTR New Material Group Co., Ltd. | Huizhou BTR New Material Technology Co., Ltd. | 9 |
| BTR New Material Group Co., Ltd. | Panasonic Corporation | 8 |
| Robert Bosch GmbH | Shanghai Jiao Tong University | 8 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
LG Energy Solution leads; Toyota shows the strongest recent momentum among top filers
The leader and primary challenger differ in both scale and recent trajectory. LG Energy Solution’s commanding record count reflects sustained investment across cell, electrode, and pack technology, while Toyota’s recent acceleration stands out as the most notable momentum signal among top-ranked filers.
LG Energy Solution
LG Energy Solution holds the top position with 6,431 patent records, with a technology focus concentrated in H01M 10 (battery cells and systems) and H01M 4 (electrode materials). As the ranking leader by a significant margin over Samsung SDI, the company has built a broad defensive portfolio spanning core electrochemical design. Momentum data is not separately provided for LG Energy Solution in the recent-window analysis, but its absolute record count reflects decades of sustained filing activity.
patent records: 6,431Toyota Motor Corporation
Toyota ranks fourth overall with 4,270 patent records and is the standout momentum story among tracked filers, with recent filings up +126% versus the prior three-year window — a real acceleration rather than recovery from a small base. Its technology emphasis mirrors the field’s core: H01M 10 (298 records) and H01M 4 (201 records), with additional coverage in H01M 50. This surge likely reflects Toyota’s intensified investment in solid-state and next-generation battery architectures leveraging its existing lithium-ion IP base.
patent records: 4,270| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| Contemporary Amperex Technology Co., Ltd. (CATL) | 170 | ▼ -54% |
| Ningde Amperex Technology Ltd. (ATL) | 105 | ▼ -36% |
| GM Global Technology Operations LLC | 39 | ▼ -52% |
| BYD Co., Ltd. | 59 | ▼ -42% |
| Toyota Motor Corporation | 122 | ▲ +126% |
| Enevate Corporation | 70 | ▼ -60% |
| BTR New Material Group Co., Ltd. | 121 | ▲ +30% |
| Shenzhen Capchem Technology Co., Ltd. | 79 | ▲ +36% |
Under-served branches adjacent to the dominant H01M core
Five IPC branches sit adjacent to the dominant H01M class but carry substantially lower patent record counts, suggesting these areas have not attracted the same filing intensity as core cell technology. Two of these are worth examining for plausible technical value and entry path.
H02J · Power supply and grid integration systems
With 1,075 patent records, H02J represents the intersection of lithium-ion battery technology and system-level power management — covering grid storage, charging infrastructure, and energy dispatch. This is one of the lowest-density adjacent branches relative to the dominant H01M core. As battery systems migrate from single-cell applications to grid-scale and vehicle-to-grid deployments, system-integration patents in H02J offer a plausible entry path for software-hardware integrators and utilities that lack a traditional cell-chemistry base. The major cell manufacturers’ focus on H01M means this branch is comparatively open to players approaching from the power-systems side.
Search this in Eureka →C22B · Metal extraction and refining (battery recycling and critical materials)
C22B carries 588 patent records — the lowest count among the five whitespace branches identified — and covers metal extraction and refining processes directly relevant to battery recycling, lithium recovery, and critical mineral processing. With regulatory pressure on battery end-of-life management increasing globally and supply-chain resilience for lithium, cobalt, and nickel under scrutiny, this branch has clear commercial relevance. The low filing density relative to cell-chemistry branches suggests that recycling and critical-material recovery remains an under-served technical area, and entrants with process chemistry or hydrometallurgy expertise may find more navigable prior-art terrain here than in core H01M classes.
Search this in Eureka →How leading applicants differ across technology sub-routes
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 2 · Batteries, cells & fuel cells | H02J 7 · Power supply & grid systems |
|---|---|---|---|---|---|
| Contemporary Amperex Technology Co., Ltd. (CATL) | Strong · 570 | Strong · 420 | Emerging · 54 | Absent | Absent |
| Ningde Amperex Technology Ltd. (ATL) | Strong · 333 | Strong · 273 | Moderate · 75 | Emerging · 39 | Absent |
| GM Global Technology Operations LLC | Strong · 290 | Strong · 252 | Moderate · 82 | Moderate · 62 | Absent |
| BYD Co., Ltd. | Strong · 261 | Strong · 220 | Moderate · 76 | Moderate · 61 | Absent |
| Toyota Motor Corporation | Strong · 298 | Strong · 201 | Emerging · 51 | Emerging · 28 | Emerging · 33 |
| Enevate Corporation | Strong · 272 | Strong · 297 | Absent | Absent | Absent |
Frequently asked questions
LG Energy Solution leads the applicant ranking with 6,431 patent records, followed by Samsung SDI with 5,162 and CATL (Hong Kong entity) with 4,969. Toyota ranks fourth with 4,270 and Ningde Amperex Technology fifth with 3,449.
Annual filing volume peaked in 2022 and has eased since, placing the field in a mature, post-peak stage. The multi-year corpus of 12,405 patent families reflects sustained long-term activity, but the annual rate is no longer climbing. Note that 2024 and 2025 filing counts are substantially under-reported due to patent publication lag.
The United States is the leading jurisdiction by a wide margin, followed by Europe (EPO) and WIPO (PCT). Canada and Australia represent secondary markets. Jurisdiction counts are at the patent-record level.
The most active co-filing pair is BTR New Material Group and Huizhou Dingyuan New Energy Technology with 123 joint filings. Other notable collaborations include BYD with Shenzhen Fangchengbao Automotive (31), Ningde Amperex Technology with Dongguan Amperex Tech (23), and Robert Bosch with Samsung SDI (13).
The five lowest-density branches adjacent to the dominant H01M core are C01B (non-metallic elements, 1,477 records), C01G (metal compounds, 1,258), H02J (power supply systems, 1,075), H01G (capacitors, 785), and C22B (metal extraction and refining, 588). H02J (system integration) and C22B (recycling and critical materials) carry plausible technical value for entrants approaching from power-systems or process-chemistry backgrounds.
Among the tracked applicants with momentum data, Toyota Motor Corporation shows the strongest recent acceleration at +126% versus the prior three-year window, reaching 122 recent filings. BTR New Material Group is up +30% and Shenzhen Capchem Technology up +36%, while several major Chinese players including CATL and BYD show recent declines of 42–60%.
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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.
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