Battery Pack Thermal Runaway Prevention Patent Landscape
Battery Pack Thermal Runaway Prevention Patent Landscape in 2026
The battery pack thermal runaway prevention patent space is highly concentrated, with a small number of filers—led by LG Energy Solution—accounting for the large majority of activity among the top hundred applicants. Multi-year growth was strong through 2019 but annual volume has since eased from that peak, placing the field in a declining phase while Europe and the US remain the dominant filing destinations.
LG Energy Solution and Xerotech dominate a tightly held field
The competitive landscape is dominated by a two-player tier: LG Energy Solution leads the ranked applicants with 45 patent families, followed closely by Xerotech with 36, together accounting for the overwhelming share of output among the top filers.
Concentration is extreme: the top five filers hold 84% of the combined output of the hundred largest filers. Below the top two, Enevate Corp (8 patent families), CPS Technology Holdings (6), and Beam Global (5) form a distinct second tier that is substantially smaller.
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 1 | LG Energy Solution Ltd | 45 | |
| 2 | Xerotech Ltd | 36 | |
| 3 | Enevate Corp | 8 | |
| 4 | CPS Technology Holdings LLC | 6 | |
| 5 | Beam Global Inc | 5 | |
| 6 | Reelred Ltd | 4 | |
| 7 | Shanghai Nanku New Energy Technology Co Ltd | 3 | |
| 8 | All Cell Technologies LLC | 2 |
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 9 | TVS Motor Company Ltd | 2 | |
| 10 | Sanyo Electric Co Ltd | 2 | |
| 11 | SK On Co Ltd | 1 | |
| 12 | LG Energy Solution Ltd | 1 | |
| 13 | Johnson Controls Technology Company | 1 | |
| 14 | GM Global Technology Operations LLC | 1 | |
| 15 | Jiangsu Zenio New Energy Battery Technology Co Ltd | 1 | |
| 16 | Bapatla Surendra Babu | 1 |
LG Energy Solution’s position reflects a deep, diversified battery-cell and pack portfolio, while Xerotech’s comparable family count—built primarily around heat-exchanger integration—signals a structurally different but equally committed approach to the problem.
Filing counts for 2024–2025 should be treated as provisional due to typical patent publication lag of 18–24 months; apparent recent softness may partly reflect incomplete publication rather than a true reduction in R&D activity.
A 2019 filing spike and a heat-management-heavy technology mix
The annual trend chart reveals a pronounced but narrow activity spike in 2019 followed by irregular, lower-volume years, while the technology composition chart shows that battery-cell and heat-exchanger classes dominate the corpus with fire-suppression and EV-propulsion branches remaining sparse.
Annual filing trend
Annual filings surged to 38 in 2019—a spike roughly an order of magnitude above the prior baseline—then fell sharply. Subsequent years show irregular activity (4–19 per year) rather than a sustained plateau. The lifecycle evidence indicates annual volume has eased back from that 2019 peak. Data for 2024–2026 is subject to publication lag and should be read as a floor, not a ceiling.
↗ Hover for values · click a bar to ask EurekaTechnology composition
H01M (batteries, cells, and fuel cells) is overwhelmingly dominant, consistent with core cell-chemistry and pack-architecture approaches to thermal runaway prevention. F28F (heat-exchanger details) and F28D (heat-exchange apparatus) form the next meaningful cluster, reflecting thermal management hardware. Fire-fighting (A62C), EV propulsion (B60L), adhesives (C09J), and chemical protection (A62D) each appear in only a handful of records, flagging them as structurally sparse branches.
↗ 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.
Apparatus and method for thermal runaway propagati…
A thermal propagation prevention device and method for a battery pack including a plurality of battery cells. The device includes a liquid loaded material, such as a hydrogel or liquid loaded superabsorbent polymer, contained in a propagation arrestor configured to cover at least one of the plurality of battery cells. The liquid loaded material is… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Adhesive tape for positioning battery cells in a b… | 72 |
| 2 | A battery pack and a method of manufacturing a bat… | 30 |
| 3 | A duct and a method of manufacturing a duct | 29 |
| 4 | Power supply device, vehicle equipped with same, p… | 22 |
| 5 | A duct and a method of manufacturing a duct | 18 |
| 6 | Apparatus and method for thermal runaway propagati… | 17 |
| 7 | Battery module having thermally conductive adhesiv… | 13 |
| 8 | Battery module with thermal propagation prevention… | 11 |
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 structure means for R&D investment decisions
Three structural features—declining lifecycle, extreme applicant concentration, absence of co-filing, and a. Europe-first jurisdiction profile—define the strategic context for any new entrant or incumbent expanding in this space.
Post-peak field with an uneven recent-filing floor
The lifecycle stage is classified as Decline, driven by annual filings easing back from the 2019 peak. The recent-window growth figure of –27% reinforces this read. For R&D investment, this suggests core architectural patents are already placed and incremental differentiation—rather than foundational staking—is the more realistic near-term objective.
Lifecycle: DeclineTwo players hold the field; the tail is very thin
The top five filers account for 84% of the hundred largest filers’ combined output, and the top two alone (LG Energy Solution at 45 families, Xerotech at 36) set the competitive bar. Below rank five, individual applicants hold single-digit family counts. A new entrant faces well-established prior art from these two players across the dominant H01M class.
High concentrationNo co-applicant activity detected in this corpus
Evidence pending: no co-applicant filings appear in the collaboration data. The absence of consortium or joint-application activity suggests the leading players have so far pursued proprietary rather than collaborative IP strategies. This could represent an opening for standards-body or consortium-led white-space work in underserved branches.
No co-filing detectedEurope and the US are the primary protection markets
Europe (EPO) leads jurisdiction coverage, followed by the United States. India and WIPO PCT filings are the next tier, with China, Germany, Spain, South Korea, and Australia each carrying modest coverage. The relatively low China count is notable given China’s dominance in cell manufacturing and may indicate a gap in enforcement-market coverage for non-Chinese filers.
Europe-firstGo 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.
Co-filing pairs, ranked by the number of jointly-filed patent families.
LG Energy Solution and Xerotech: complementary routes to the same problem
The two leading filers approach thermal runaway prevention from different technical angles—LG Energy Solution through cell and pack architecture, Xerotech through thermal management hardware—and both entered or substantially expanded their positions as new entrants in the recent window.
LG Energy Solution
LG Energy Solution holds 45 patent families, the largest count in the corpus, concentrated in H01M 10 and H01M 50 (batteries, cells, and fuel cells) with a small presence in A62C (fire-fighting). Its momentum trend is flagged as a new entrant in the recent filing window, indicating that its 31 recent-period families represent a concentrated, newly established position rather than a long-standing accumulation.
families: 45Xerotech
Xerotech holds 36 patent families and is distinguished by a strong heat-exchanger focus: F28F 1 and F28F 21 each appear 21 times alongside the core H01M 10 class (40 records), making it the only top-tier filer with a material thermal-hardware orientation. Its momentum trend shows a sharp decline (-95% vs prior period), suggesting its recent filing pace has moderated significantly after an earlier burst of activity.
families: 36| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| LG Energy Solution Ltd | 31 | ▲ new entrant |
| Xerotech Ltd | 2 | ▼ -95% |
| All Cell Technologies LLC | 1 | ▲ new entrant |
| TVS Motor Company Ltd | 2 | ▲ new entrant |
| GM Global Technology Operations LLC | 1 | ▲ new entrant |
Under-served adjacent branches worth monitoring
Several IPC branches adjacent to the dominant H01M core carry very low patent-record counts relative to the corpus, indicating sparse coverage rather than validated commercial gaps; each has a plausible technical connection to thermal runaway prevention that warrants further investigation.
A62C · Fire-fighting systems
Only 3 patent records fall under A62C (fire-fighting), giving it a 2% share of the corpus. From a technical standpoint, active suppression—gas-discharge, water-mist, or aerosol systems integrated into pack enclosures—is a direct last-line-of-defense complement to passive thermal management. Entry paths include cross-licensing with fire-suppression specialists or filing around pack-integrated suppression architectures not yet covered by LG Energy Solution’s or Xerotech’s existing claims.
Search this in Eureka →A62D · Chemical protection and detoxification
A62D holds only 1 patent record in this corpus, the sparsest of the identified adjacent branches. Thermal runaway events release toxic and flammable off-gases; chemical neutralization or venting architectures that detoxify those gases are a technically relevant but largely unaddressed angle in this corpus. The low count may reflect that this problem is being addressed in adjacent domains (e.g., HVAC or industrial safety) rather than within battery-pack patent literature, suggesting a framing opportunity for applicants who can bridge those domains.
Search this in Eureka →How leading filers differ by technology route
Strength of each leader across the main technology routes.
| Player | H01M 10 · Batteries, cells & fuel cells | H01M 50 · Batteries, cells & fuel cells | F28F 1 · Heat-exchanger details | F28F 21 · Heat-exchanger details | F28D 1 · Heat-exchange apparatus |
|---|---|---|---|---|---|
| Xerotech Ltd | Strong · 40 | Emerging · 4 | Strong · 21 | Strong · 21 | Moderate · 17 |
| LG Energy Solution Ltd | Strong · 45 | Strong · 45 | Absent | Absent | Absent |
| Enevate Corp | Strong · 8 | Strong · 5 | Absent | Absent | Absent |
| Johnson Controls Technology Company | Strong · 5 | Strong · 5 | Absent | Absent | Absent |
| All Cell Technologies LLC | Strong · 7 | Absent | Absent | Absent | Absent |
| CPS Technology Holdings LLC | Strong · 2 | Strong · 2 | Absent | Absent | Absent |
| Shanghai Nanku New Energy Technology Co Ltd | Strong · 3 | Absent | Absent | Absent | Absent |
Frequently asked questions
The corpus analyzed contains 113 patent families in scope across the identified applicants and time window.
LG Energy Solution leads with 45 patent families, concentrated in H01M (batteries, cells, and fuel cells) and including a small A62C (fire-fighting) component. Xerotech is the closest competitor with 36 patent families, distinguished by significant heat-exchanger coverage.
The field is classified as Decline based on annual filings easing back from a 2019 peak. The recent-window growth rate is -27%. This does not preclude targeted entry but does indicate that foundational architectural patents are already well established.
Europe (EPO) leads jurisdiction coverage, followed by the United States. India, WIPO PCT, Canada, China, and Germany each carry meaningful but smaller counts. China’s relatively low representation is notable given its manufacturing footprint in the battery sector.
Yes—evidence identifies several sparse adjacent branches. A62C (fire-fighting, 3 records) and A62D (chemical protection and detoxification, 1 record) are the most technically relevant and least covered relative to the dominant H01M core. B60L (EV propulsion), C09J (adhesives), and B29L (plastic products) are also sparse, though their connection to thermal runaway prevention is more indirect.
No co-applicant filing activity is detected in the available evidence for this corpus. The leading players appear to pursue independent, proprietary IP strategies, which leaves open the possibility of consortium or standards-body activity that is not yet reflected in formal patent filings.
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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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