Battery Management System Patent Landscape 2026
Battery Management System Patent Landscape in 2026
The battery management system patent field is a concentrated, high-growth arena dominated by Korean and Chinese battery makers, with LG Energy Solution holding a commanding lead over all rivals. Activity has expanded substantially over the multi-year window, with the United States the primary filing destination and the core cell-chemistry class accounting for the largest share of technical coverage.
LG Energy Solution leads a highly concentrated field of battery management innovators
LG Energy Solution sits atop the applicant ranking with a commanding lead over the next-largest filer, Samsung SDI, which itself ranks well ahead of the remaining players. The top five filers account for 54% of the combined patent records of the hundred largest filers, signaling a tightly held competitive position at the front of the field.
A pronounced tier gap separates the top two applicants from the rest of the ranking. Contemporary Amperex Technology (CATL), Robert Bosch, and Contemporary Amperex Technology (Hong Kong) form a secondary cluster, while BYD, LG Chem, Hyundai Motor, EVE Energy, and CPS Technology Holdings occupy a third tier that trails substantially. The concentration structure suggests that challenging the front-runners requires either a broad filing strategy or a targeted niche differentiation.
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 1 | LG Energy Solution Ltd. | 10,853 | |
| 2 | Samsung SDI Co., Ltd. | 3,454 | |
| 3 | Contemporary Amperex Technology Co., Ltd. (CATL) | 1,616 | |
| 4 | Robert Bosch GmbH | 1,211 | |
| 5 | Contemporary Amperex Technology (Hong Kong) Limited | 1,005 | |
| 6 | BYD Co., Ltd. | 916 | |
| 7 | LG Chem Ltd. | 846 | |
| 8 | Hyundai Motor Company | 616 | |
| 9 | EVE Energy Co., Ltd. | 581 | |
| 10 | CPS Technology Holdings LLC | 482 |
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 11 | Samsung Electronics Co., Ltd. | 469 | |
| 12 | SK On Co., Ltd. | 413 | |
| 13 | CEA (Commissariat à l’énergie atomique et aux énergies alternatives) | 392 | |
| 14 | SVOLT Energy Technology Co., Ltd. | 375 | |
| 15 | Toyota Motor Corporation | 366 | |
| 16 | GM Global Technology Operations LLC | 333 | |
| 17 | Huawei Digital Power Technologies Co., Ltd. | 331 | |
| 18 | 24M Technologies Inc. | 258 | |
| 19 | Hefei Guoxuan High-Tech Power Energy Co., Ltd. | 248 | |
| 20 | EVE Power Co., Ltd. | 243 |
The leaders’ positions reflect deep investment in core battery cell and pack technology rather than peripheral sub-systems, creating a structural barrier for later entrants who must either compete on the same ground or carve out application-specific segments such as electric vehicle propulsion or grid integration.
Patent records from the most recent 18–24 months are subject to publication lag and undercount actual filing activity; the 2025 and 2026 figures in particular should be treated as partial. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
A sustained multi-year build-up concentrated in battery cell and EV propulsion technology
The annual filing trend and the technology class breakdown together tell a consistent story: a field that has grown substantially since 2017 and remains anchored in core electrochemical cell management, with secondary coverage of power supply, measurement, and electric vehicle propulsion.
Annual filing trend
Filings rose steeply from 2017 through a 2022 peak, with the multi-year window showing 26% recent growth. Annual volume from 2023 onward reflects both genuine stabilization and the expected undercount from publication lag; the 2025 and 2026 data points are heavily incomplete and should not be read as a real decline.
↗ Hover for values · click a bar to ask EurekaTechnology composition
H01M (batteries, cells, and fuel cells) is by far the dominant class, reflecting BMS work deeply integrated with cell-level chemistry and pack design. H02J (power supply and grid systems), G01R (electrical measurement), and B60L (electric vehicle propulsion) form a meaningful secondary layer, indicating that state-of-charge estimation, charging control, and EV integration are well-contested sub-domains. Lower-count classes such as A62C (fire-fighting), G06F (digital data processing), and H05K (printed circuits) suggest comparatively lighter coverage in thermal safety, software, and hardware integration.
↗ 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.
Switching circuit for cell balancing in a battery …
A switching circuit for cell-balancing in a battery management system, BMS. The switching circuit comprises: a first battery connection terminal, for connecting to a first battery terminal; a second battery connection terminal, for connecting to a second battery terminal; and a cell balancing field effect transistor, FET. The cell balancing FET comprises: a… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Charging system that enables emergency resolutions… | 2,177 |
| 2 | Surgical apparatus configured to track an end-of-l… | 2,152 |
| 3 | Power adapter for a surgical instrument | 2,100 |
| 4 | Reinforced battery for a surgical instrument | 1,779 |
| 5 | Surgical apparatus configured to assess whether a … | 1,608 |
| 6 | System for monitoring whether a surgical instrumen… | 1,402 |
| 7 | Viral distribution of battery management parameters | 835 |
| 8 | Battery management apparatus for portable electron… | 492 |
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 patent structure means for R&D investment decisions
The concentration, growth trajectory, collaboration network, and geographic spread of BMS patents together define where defensible positions already exist and where gaps remain accessible to new entrants or focused challengers.
Growth stage with a broad multi-year build-up
The field is classified as Growth stage. Annual filings expanded consistently from 2017 through 2022 and the multi-year window shows 26% recent growth, indicating the technology is still attracting sustained investment rather than approaching commoditization. Late-period figures are understated by publication lag, so the apparent plateau from 2023 should not be interpreted as market saturation.
Growth stageTop-heavy ranking with a large tier gap below the leader
The top five filers hold 54% of patent records among the hundred largest filers, and the gap between LG Energy Solution and Samsung SDI — let alone the broader field — is substantial. This concentration raises freedom-to-operate risk for new entrants in core cell management and signals that R&D investment in underpopulated adjacent classes may offer a lower-friction entry path than direct competition in H01M.
High concentrationHyundai–Kia and Samsung SDI–Bosch are the most active co-filing pairs
The most active collaboration pair is Hyundai Motor and Kia, with 243 co-filed records, reflecting deep integration of BMS work across their shared vehicle platforms. Samsung SDI co-files with Robert Bosch (80 records), Hanyang University (13 records), and Seoul National University R&D Foundation (11 records), indicating both an industry–supplier alliance and an academic pipeline feeding its innovation program. LG Energy Solution co-files with the University of California Regents (3 records), suggesting a more selective academic collaboration stance.
Active co-filingUS and EPO dominate; PCT provides international reach
The United States is the lead filing jurisdiction, followed by Europe via the EPO and WIPO PCT filings. Australia and Canada form a smaller secondary ring. Notably, direct national filings in Germany, Japan, and China are very low in this dataset, which likely reflects the structure of the corpus rather than an absence of activity in those markets — engineers assessing freedom to operate in Asia should supplement this analysis with dedicated national office searches.
US-led filingGo 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 | 243 |
| Samsung SDI Co., Ltd. | Robert Bosch GmbH | 80 |
| Samsung SDI Co., Ltd. | Hanyang University | 13 |
| Samsung SDI Co., Ltd. | Seoul National University R&D Foundation | 11 |
| BYD Co., Ltd. | Shenzhen Fang Cheng Bao Automobile Sales Co., Ltd. | 11 |
| LG Chem Ltd. | Siliconworks Co., Ltd. | 5 |
| Samsung SDI Co., Ltd. | Georgia Tech Research Corporation | 4 |
| Robert Bosch GmbH | Lithium Energy and Power GmbH & Co. KG | 4 |
| LG Energy Solution Ltd. | The Regents of the University of California | 3 |
| Samsung SDI Co., Ltd. | POSTECH (Pohang University of Science and Technology) | 3 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
LG Energy Solution and Samsung SDI lead by volume; Hyundai Motor accelerates
The top two filers are separated from all others by a substantial margin, but momentum data reveals diverging trajectories within the top tier: LG Energy Solution is growing, Samsung SDI is accelerating sharply from a prior base, while several incumbents are retreating.
LG Energy Solution
LG Energy Solution is the clear volume leader with 10,853 patent records and a recent filing trend of +26%, indicating sustained forward investment. Its technical focus is centered on H01M 10 (battery cells and management), H01M 50 (battery pack components), and G01R 31 (state-of-charge and diagnostic measurement), reflecting a strategy that integrates cell-level and system-level BMS in a single broad portfolio.
patent records: 10,853Samsung SDI
Samsung SDI ranks second with 3,454 patent records and is accelerating sharply, with recent filings running at 3.8× the prior three-year rate — a signal of a significant ramp-up rather than organic drift. Its focus mirrors the leader’s in H01M 10 and H01M 50 but extends into H01M 4 (electrode materials), suggesting an ambition to cover both cell chemistry and management system design. Its co-filing relationship with Robert Bosch (80 records) adds a vehicle-systems dimension.
patent records: 3,454| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| LG Energy Solution Ltd. | 1,717 | ▲ +26% |
| LG Chem Ltd. | 1 | ▼ -100% |
| Samsung SDI Co., Ltd. | 684 | ▲ 3.8× vs prior 3-yr |
| Contemporary Amperex Technology Co., Ltd. (CATL) | 341 | ▼ -16% |
| Robert Bosch GmbH | 14 | ▼ -72% |
| Hyundai Motor Company | 103 | ▲ +49% |
| Samsung Electronics Co., Ltd. | 58 | ▼ -43% |
Under-served adjacent branches worth monitoring
Several IPC classes appearing at the margins of the BMS corpus are sparsely populated relative to the dominant H01M cluster, and each has a plausible technical connection to battery management that could reward targeted filing.
A62C · Fire-fighting and thermal safety
With only 287 patent records, the fire-fighting and thermal-safety branch is notably sparse given the well-documented thermal runaway risks in high-energy battery packs. The technical connection is direct — BMS algorithms that detect, suppress, or prevent thermal events overlap naturally with fire-suppression hardware and materials. An entry path exists via system-level integration patents that combine BMS sensing with active suppression actuation, an area that regulatory pressure on EV and stationary storage products is likely to force onto product roadmaps.
Search this in Eureka →G06F · Electric digital data processing and software BMS
G06F (digital data processing) records only 286 patent records in this corpus, despite the growing importance of software-defined BMS architectures, cloud-connected battery monitoring, and AI-driven state estimation. The sparse coverage may reflect that software claims are filed under H01M or H02J rather than G06F, but it also suggests that applicants with a software-first BMS strategy face less direct competition in this sub-class. Entry is accessible for companies with embedded-software or digital-twin competencies seeking to establish IP around data-driven battery diagnostics.
Search this in Eureka →How leading applicants differ in their technology route emphasis
Strength of each leader across the main technology routes.
| Player | H01M 10 · Batteries, cells & fuel cells | H01M 50 · Batteries, cells & fuel cells | H02J 7 · Power supply & grid systems | G01R 31 · Electric & magnetic measurement | H01M 2 · Batteries, cells & fuel cells |
|---|---|---|---|---|---|
| LG Energy Solution Ltd. | Strong · 3,300 | Moderate · 1,636 | Emerging · 529 | Moderate · 921 | Absent |
| LG Chem Ltd. | Strong · 1,805 | Strong · 1,077 | Moderate · 408 | Moderate · 504 | Moderate · 803 |
| Samsung SDI Co., Ltd. | Strong · 1,565 | Moderate · 625 | Moderate · 317 | Emerging · 246 | Emerging · 191 |
| Contemporary Amperex Technology Co., Ltd. (CATL) | Strong · 806 | Moderate · 202 | Moderate · 220 | Emerging · 146 | Emerging · 34 |
| Robert Bosch GmbH | Strong · 361 | Moderate · 117 | Moderate · 114 | Moderate · 141 | Moderate · 94 |
| Johnson Controls Technology Company | Strong · 193 | Strong · 137 | Moderate · 63 | Moderate · 75 | Strong · 117 |
| Samsung Electronics Co., Ltd. | Strong · 288 | Absent | Strong · 175 | Moderate · 113 | Absent |
Frequently asked questions
LG Energy Solution holds the top position with 10,853 patent records, a substantial lead over the second-ranked Samsung SDI at 3,454 records. Its portfolio is concentrated in battery cell management, pack component design, and state-of-charge measurement.
The field has shown 26% recent growth across the multi-year window. Annual filings rose from 951 in 2017 to a peak of 2,348 in 2022. Figures from 2023 onward reflect both a natural moderation and the undercount caused by patent publication lag, so the apparent dip in 2024–2025 data should not be read as a real decline.
The United States leads with 9,923 patent records, followed by Europe via the EPO with 7,042 records and WIPO PCT with 1,990 records. Australia and Canada form a smaller secondary ring. Direct national filings in Germany, Japan, and China are very low in this dataset and may require supplementary national-office searches for a complete picture.
H01M (batteries, cells, and fuel cells) is the dominant class, with H02J (power supply and grid systems), G01R (electrical and magnetic measurement), and B60L (electric vehicle propulsion) forming a significant secondary layer. Lower-count classes include A62C (fire-fighting), G06F (digital data processing), and H05K (printed circuits and assemblies).
Hyundai Motor and Kia are the most active pair with 243 co-filed records, reflecting shared vehicle platform development. Samsung SDI co-files with Robert Bosch (80 records) and with university partners including Hanyang University (13 records) and Seoul National University R&D Foundation (11 records). LG Energy Solution co-files with the University of California Regents (3 records).
The fire-fighting and thermal-safety class (A62C, 287 records) and the digital data processing class (G06F, 286 records) are comparatively sparse relative to the dominant H01M cluster. Both have a direct technical connection to advanced BMS — thermal runaway prevention and software-defined management respectively — and may represent accessible entry points for focused filing strategies.
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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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