Bipolar Battery Thermal Management Patent Landscape
Bipolar Battery Thermal Management Patent Landscape in 2026
The bipolar battery thermal management patent space is highly concentrated, with Toyota Motor Corporation and Advanced Battery Concepts LLC together commanding a dominant share of the leading filers. Annual volume has eased from its 2017 peak, placing the field in a declining phase, though pockets of adjacent technical space remain largely uncontested.
Toyota leads a tightly held, specialist field
Toyota Motor Corporation sits atop the applicant ranking, followed by Advanced Battery Concepts LLC and Nissan Motor Co., Ltd. — establishing a clear Japanese-American duopoly at the top two tiers.
The top five filers account for 72% of the hundred largest filers’ combined total, signalling an unusually concentrated field where a small group of specialists and one large automaker set the technical agenda.
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 1 | Toyota Motor Corporation | 36 | |
| 2 | Advanced Battery Concepts LLC | 27 | |
| 3 | Nissan Motor Co., Ltd. | 15 | |
| 4 | Toyota Industries Corporation | 7 | |
| 5 | Apple Inc. | 7 | |
| 6 | Beijing Hawaga Power Storage Technology Co., Ltd. | 5 | |
| 7 | Furukawa Electric Co., Ltd. | 4 | |
| 8 | Furukawa Battery Co., Ltd. | 4 | |
| 9 | UNICELL | 4 | |
| 10 | Shenzhen Fengdian New Energy Technology Co., Ltd. | 3 |
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 11 | Exergy Power Systems | 3 | |
| 12 | Shenzhen Central Power Technology Co., Ltd. | 2 | |
| 13 | Nanjing Boneng Fuel Cell Co., Ltd. | 1 | |
| 14 | Yangzhou Nanopore Innovative Materials Technology Ltd. | 1 | |
| 15 | Wuhan Changhai Electric Propulsion and Chemical Power Co., Ltd. | 1 | |
| 16 | GOLDSTEIN JONATHAN R | 1 | |
| 17 | Yang Jian | 1 | |
| 18 | The United States of America as represented by the Secretary | 1 | |
| 19 | SAIC Volkswagen Automotive Co., Ltd. | 1 | |
| 20 | Japan Climate Systems Corporation | 1 |
Toyota’s position — reinforced by co-filing activity with Toyota Industries Corp — suggests deep vertical integration in both cell architecture and thermal control; challengers must navigate an entrenched IP thicket to compete on core bipolar stack cooling.
The most recent filing periods are subject to publication lag and likely under-represent activity from roughly 2024 onward; apparent softness in those years should not be read as confirmed declining interest. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
A peaked field anchored in core battery chemistry
The annual filing trend and the technology composition chart together reveal a domain that built up through 2017 and has since moderated, with virtually all activity concentrated in a single primary IPC class.
Annual filing trend
Filings peaked in 2017, dipped sharply through 2019, recovered partially to a secondary peak in 2021, and have since eased. The 2024–2025 bars are subject to publication lag and should be treated as floor estimates rather than final counts.
↗ Hover for values · click a bar to ask EurekaTechnology composition
H01M (Batteries, cells and fuel cells) is overwhelmingly dominant, accounting for the vast majority of IPC-coded records. All other branches — including B60L (electric vehicle propulsion) and H02J (power supply systems) — appear with minimal representation, confirming that the field has not yet diffused into adjacent application domains.
↗ 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.
Power storage device and manufacturing method ther…
In a power storage unit in which a bipolar battery is covered with a resin body, at least one through passage is formed to extend through the resin body, and a heat exchange medium is introduced into the through passage so that heat is exchanged between the heat exchange medium and the bipolar battery when the heat exchange medium flows thorough the through… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Bipolar battery having cooling tab | 222 |
| 2 | Power supply device, and its control method | 60 |
| 3 | Secondary battery | 58 |
| 4 | Laminated battery, battery pack and vehicle | 48 |
| 5 | Bipolar battery, battery pack, and car | 35 |
| 6 | Bipolar battery assembly | 34 |
| 7 | Bipolar battery design | 31 |
| 8 | Quasi-bipolar battery cells and arrangements | 31 |
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 strategy
The combination of high concentration, a peaked filing curve, and sparse adjacent-branch coverage creates a specific strategic context: incumbents hold the core, but system-integration and application-layer angles remain open.
Field is in decline from a 2017 peak
The lifecycle stage is classified as Decline, driven by annual filings easing back from the 2017 peak. On a multi-year view the corpus remains meaningful at 66 patent families, but the downward trajectory indicates core bipolar thermal management concepts are maturing and foundational positions are largely staked. New entrants should focus on differentiated sub-problems rather than replicating established stack-cooling architectures.
Lifecycle: Decline72% share held by top five filers
The top five filers — Toyota Motor Corporation, Advanced Battery Concepts LLC, Nissan Motor Co. Ltd., Toyota Industries Corp, and Apple Inc. — hold 72% of the hundred largest filers’ combined total. This degree of concentration is typical of a field where one or two originators define the core IP, leaving later entrants to work around or license foundational patents. The most-cited document, ‘Bipolar battery having cooling tab,’ carries 222 citations and represents a particularly dense prior-art anchor.
High concentrationTwo active co-filing pairs anchor the ecosystem
The most active co-filing relationship is between Furukawa Battery Co., Ltd. and Furukawa Electric Co., Ltd., with four joint filings, reflecting tightly integrated materials-and-cell development within the Furukawa group. Toyota Motor Corporation and Toyota Industries Corp have filed jointly twice, extending Toyota’s vertical integration into manufacturing-adjacent thermal solutions. No cross-group or academic co-filing appears in the evidence, suggesting the ecosystem is silo-structured.
Silo ecosystemJapan leads; US and China are secondary but active
Japan is the lead filing jurisdiction, followed by the United States and China. Europe (EPO) and South Korea also carry meaningful coverage, while WIPO (PCT) filings are limited, suggesting applicants are not aggressively pursuing broad multi-jurisdictional protection via PCT. India and Germany appear at the margin. An R&D team seeking freedom-to-operate should prioritize Japan and the US first, then China and EPO as secondary clearance targets.
JP > US > CNGo 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 |
|---|---|---|
| Furukawa Battery Co., Ltd. | Furukawa Electric Co., Ltd. | 4 |
| Toyota Motor Corporation | Toyota Industries Corporation | 2 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
Toyota dominates; Advanced Battery Concepts is the closest rival
The two leading filers differ in origin and trajectory: Toyota is a large incumbent deepening an existing portfolio, while Advanced Battery Concepts LLC is a specialist whose recent filing pace has sharply contracted.
Toyota Motor Corporation
Toyota Motor Corporation leads with 36 patent records, concentrated in H01M 10 and H01M 50 — core battery cell and assembly codes. Its momentum is classified as a new entrant in the recent window, indicating recent filing activity that is notable relative to a previously quiet period. Co-filing with Toyota Industries Corp extends coverage into manufacturing and thermal integration. The breadth and recency of Toyota’s filings make it the most likely licensor or blocker for any entrant targeting bipolar stack thermal control.
patent records: 36Advanced Battery Concepts LLC
Advanced Battery Concepts LLC holds 27 patent records, also weighted toward H01M 10 and H01M 50, with additional emphasis on H01M 4 (electrode materials). However, its recent filing trend shows a sharp contraction of –80% versus the prior three-year period, signalling that the company’s filing campaign may be complete or paused. Its foundational ‘Bipolar battery having cooling tab’ patent (222 citations) is the most-cited in the corpus, making it a critical prior-art reference regardless of current activity level.
patent records: 27| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| Toyota Motor Corporation | 8 | ▲ new entrant |
| Advanced Battery Concepts LLC | 2 | ▼ -80% |
| Furukawa Battery Co., Ltd. | 3 | ▲ new entrant |
| Furukawa Electric Co., Ltd. | 3 | ▲ new entrant |
Under-served branches adjacent to the dominant H01M core
Four IPC branches each carry only a single patent record against the dominant H01M corpus, representing areas where bipolar thermal management intersects with broader system contexts that are currently under-explored. These are observations of relative sparsity; entry viability depends on further technical and commercial validation.
B60L · Electric vehicle propulsion integration
Only one patent record addresses the intersection of bipolar battery thermal management with B60L (electric vehicle propulsion systems). Given that bipolar batteries are actively considered for EV powertrains — where thermal management directly affects range, cycle life, and safety — this sparsity is technically notable. An entrant with EV powertrain expertise could explore thermal management claims framed around traction-battery pack integration, potentially differentiating from Toyota’s cell-level approach. The primary entry hurdle is designing around Toyota’s and Nissan’s existing H01M stack patents.
Search this in Eureka →H02J · Power supply and grid-connected thermal control
H02J (power supply and grid systems) has a single patent record in the corpus, suggesting that the interaction between bipolar battery thermal management and charge/discharge power electronics — including thermal effects of fast charging or grid storage cycling — has not been systematically claimed. As stationary storage applications grow, thermal management under high-rate grid-cycling conditions represents a plausible technical differentiation angle. Entry requires linking thermal management outcomes to power circuit or BMS architectures, a domain where few current filers have staked claims.
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 50 · Batteries, cells & fuel cells | H01M 4 · Batteries, cells & fuel cells | H01M 2 · Batteries, cells & fuel cells | H01M 6 · Batteries, cells & fuel cells |
|---|---|---|---|---|---|
| Toyota Motor Corporation | Strong · 35 | Strong · 26 | Moderate · 9 | Moderate · 12 | Emerging · 2 |
| Advanced Battery Concepts LLC | Strong · 27 | Strong · 21 | Strong · 16 | Moderate · 10 | Emerging · 3 |
| Nissan Motor Co., Ltd. | Strong · 14 | Moderate · 4 | Strong · 14 | Strong · 12 | Absent |
Frequently asked questions
The corpus in scope contains 66 patent families. Filing activity peaked in 2017 and has eased since, placing the field in a decline lifecycle stage.
Toyota Motor Corporation leads with 36 patent records, followed by Advanced Battery Concepts LLC with 27 and Nissan Motor Co., Ltd. with 15. Toyota’s focus is concentrated in core battery cell and assembly IPC codes.
Japan is the lead filing jurisdiction, followed by the United States and China. Europe (EPO) and South Korea carry secondary coverage. WIPO (PCT) filings are limited, so jurisdiction-by-jurisdiction clearance is advisable rather than relying on PCT as a proxy.
The most-cited document is titled ‘Bipolar battery having cooling tab,’ with 222 citations. It is associated with Advanced Battery Concepts LLC and represents the densest prior-art anchor in the corpus; any new filing in this space should be evaluated against it.
Two co-filing pairs are documented: Furukawa Battery Co., Ltd. and Furukawa Electric Co., Ltd. (4 joint filings), and Toyota Motor Corporation with Toyota Industries Corp (2 joint filings). Both are intra-group arrangements; no cross-group or university partnerships appear in the evidence.
The branches with the fewest patent records relative to the dominant H01M class are B60L (electric vehicle propulsion), H02J (power supply and grid systems), G01D (general measurement and recording), and G01R (electric and magnetic measurement), each with only one patent record. These represent under-served adjacent branches, though technical fit and commercial viability require further validation before treating them as investment targets.
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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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