Aircraft Battery Systems Patents: Top Companies & Trends 2026
- 39.3% concentration at the top. The five leading assignees account for 1,318 of 3,353 records in scope, but the ranked field runs 100 companies deep with a long tail below them.
- Filing cooled from its 2022 peak. Filings hit 530 in 2022; the complete-year comparison shows 2021's 286 falling to 213 by 2024, a 26% decline over that span.
- Battery chemistry outweighs airframe-specific claims. H01M (batteries and cells) touches 57.1% of records while B64D and B64C, the aircraft-specific classes, sit at 6.7% and 4.8% respectively.
Filing growth compares 2021 (286 records) with 2024 (213) — a three-year span. 2024 is the most recent year we treat as complete: publication lags filing by roughly 18 months, so 2025 onwards are still filling in and any growth rate that ends there would understate the field. Top-5 share is the combined record count of the five largest assignees divided by all 3,353 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
This dataset tracks 3,353 published records at the intersection of aircraft battery hardware and the electrochemical and control problems that make it safe to fly — thermal runaway, cell balancing, deep discharge, and state-of-charge management. The search spans aircraft battery, nickel cadmium battery and battery charger unit filings crossed against the failure-mode and control vocabulary that distinguishes aviation-grade claims from generic consumer battery management.
Coverage runs from 2015 through the 2026-07-31 cut-off. Because publication lags filing by roughly 18 months, the most recent one to two years in any trend chart will read lower than the eventual filed total once those applications publish.
Filing trend and technology composition
Two views of the same 3,353 records: how filing activity has moved year over year, and which IPC subclasses carry the claim density.
Filing trend, 2017–2026
Filings rose from 126 in 2017 to a peak of 530 in 2022. Comparing the two most recent complete years, 2021 (286) to 2024 (213) shows a 26% decline — a real cooling in disclosed activity, not an artefact of publication lag, though 2025 and 2026 figures will still rise as pending applications publish.
Technology composition by IPC subclass
H01M (batteries, cells and fuel cells) appears in 57.1% of records and H02J (power supply and grid systems) in 31.9%, confirming that most disclosed invention sits in cell and power-electronics chemistry rather than airframe integration. B64D and B64C, the aircraft-equipment and aeroplane/helicopter classes, cover only 6.7% and 4.8% of records respectively — a record can carry several classes, so these figures sum to more than 100%.
Shares are the percentage of the 3,353 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Aircraft Battery Systems with Eureka
This page is one run against one query. Ask Eureka your own question about aircraft battery systems and every answer comes back with the patent numbers behind it.
Try EurekaRepresentative filing and most-cited prior art
Closed-loop battery monitoring and charging system
One embodiment is an aircraft comprising a rechargeable main battery for providing power to a system load of the aircraft; power source for providing at least one of a voltage and a current for recharging the rechargeable main battery; and a controller module connected to the rechargeable main battery, the controller module configured to control a process of recharging the rechargeable main battery using the at least one of the voltage and the current according to a battery type of the rechargeable main battery without removing the rechargeable main battery from the aircraft.Filed by Textron Innovations, published 2023-11-30 as US20230382255A1.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20090096413A1 | System and method for inductive charging of portable devices | 1,904 |
| 2 | US20070182367A1 | Inductive power source and charging system | 1,624 |
| 3 | US6157169A | Monitoring technique for accurately determining residual capacity of a battery | 1,191 |
| 4 | US6072299A | Smart battery with maintenance and testing functions, communications and display | 1,028 |
| 5 | US20070279002A1 | Power source, charging system, and inductive receiver for mobile devices | 802 |
| 6 | US5411537A | Rechargeable biomedical battery powered devices with recharging and control system therefor | 789 |
| 7 | US7952322B2 | Inductive power source and charging system | 718 |
| 8 | US8169185B2 | System and method for inductive charging of portable devices | 629 |
| 9 | US4709202A | Battery powered system | 625 |
| 10 | US7948208B2 | Power source, charging system, and inductive receiver for mobile devices | 609 |
Citation counts favour older filings simply because they have had longer to accumulate citations inside this corpus; treat them as a signal of influence on the field, not of current filing activity.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Browse MCP servers →What the numbers mean for filing strategy
Three read-throughs from the trend, class, and jurisdiction data that matter for anyone deciding where to file next.
The top of the field is not a monopoly
The five leading assignees hold 39.3% of all records, and the top ten reach 48.5%. That leaves more than half the field to the remaining 90 ranked companies and unranked filers — a long tail, not a closed field.
Claims cluster in the cell, not the aircraft
H01M battery and cell claims cover more than half the dataset while aircraft-equipment class B64D covers under 7%. Aviation-specific integration claims — mounting, vent ducting, crew interface — are comparatively sparse.
Activity has cooled from its 2022 peak
Filings peaked at 530 in 2022 and, comparing the two most recent complete years, fell 26% from 2021 to 2024. This reads as a genuine slowdown in disclosed invention rather than a publication-lag artefact, since both years are past the 18-month lag window.
US and EPO dominate the receiving offices
The United States (1,295) and EPO (938) lead receiving offices by a wide margin over WIPO/PCT (174), Germany (145), India (130) and Japan (128), pointing to where enforcement and freedom-to-operate risk concentrates.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to aircraft battery systems, with the prior art for and against each one.
Who is filing, and where momentum is moving
The assignee ranking spans 100 companies counted by record; a handful lead, but recent-year momentum shows even the leaders slowing from prior-year filing rates.
One assignee well ahead of the field
The leading assignee holds 795 records, well clear of fifth place at 85 and tenth place at 52 — a steep drop-off that marks a genuine leader rather than a crowded top tier.
Even top filers are pulling back
Recent-year filing counts show the leading assignees down sharply year over year — one leader at 6 filings in the latest year versus a 78% YoY drop, and others down 72% to 92%. Some show zero in the latest year, though this partly reflects publication lag on very recent applications.
Co-filing is limited and automotive-flavoured
Only 10 co-assignee pairs appear in the dataset, the strongest linking a major automaker with a major battery cell maker at 11 shared records — evidence of supplier-OEM co-development rather than broad industry consortia.
| Assignee | Recent year | YoY |
|---|---|---|
| LG Energy Solution Ltd | 6 | -78% |
| Archer Aviation Inc | 5 | -72% |
| Beta Air LLC | 1 | -75% |
| Contemporary Amperex Technology Co., Ltd. (CATL) | 1 | -92% |
| LG Chem Ltd | 0 | — |
| Toyota Jidosha KK | 0 | — |
| Asahi Kasei Corporation | 0 | — |
| Sanyo Electric Co Ltd | 0 | — |
Where to take this analysis
The trend and class data point to specific next steps depending on whether you are scoping freedom-to-operate or looking for a filing gap.
Screen the under-claimed sub-areas
Vent duct thermal management and aviation-specific cell balancing carry far fewer records than core H01M chemistry claims. A focused prior-art search on these narrower terms can confirm how much room remains before drafting.
Explore white space in EurekaMap freedom-to-operate against the leader
With one assignee holding 795 records and clear co-filing ties to at least one other major player, any product roadmap touching aircraft battery charging or monitoring should check claim scope against that portfolio first.
Run a freedom-to-operate check in EurekaCommon questions on aircraft battery systems patents
One assignee leads the ranked field with 795 records, far ahead of fifth place at 85 and tenth place at 52. The top five assignees combined hold 39.3% of all 3,353 records in scope, and the top ten hold 48.5%. Below that the field spreads across a long tail of the remaining ranked companies plus unranked single-filing entrants, so the space is led but not closed.
Filing peaked at 530 in 2022, and comparing the two most recent complete years — 2021 at 286 versus 2024 at 213 — shows a 26% decline. Because publication lags filing by roughly 18 months, 2025 and 2026 figures are still incomplete and will rise as pending applications publish, but the 2021-to-2024 comparison itself is a real cooling, not a lag artefact.
Battery cell and chemistry claims under IPC class H01M appear in 57.1% of the 3,353 records, and power supply/grid systems under H02J appear in 31.9%. Aircraft-specific classes are comparatively thin: B64D (aircraft equipment) covers 6.7% and B64C (aeroplanes and helicopters) covers 4.8%. This means most patented invention in this space is battery and power-electronics chemistry that happens to be applicable to aircraft, rather than airframe-specific integration.
The gap sits in aviation-specific integration rather than core chemistry: vent duct thermal-runaway containment, cell balancing tuned to aviation duty cycles, deep-discharge recovery for standby packs, and state-of-charge estimation under altitude and temperature swings all show far fewer aircraft-specific filings than the dense H01M and H02J chemistry classes. A first claim in one of these areas should tie a specific aviation operating condition — altitude, duty cycle, or emergency power draw — to the control or containment method, rather than claiming the underlying battery chemistry broadly.
The United States leads receiving offices with 1,295 filings, followed by the European Patent Office at 938. WIPO/PCT filings total 174, with Germany at 145, India at 130 and Japan at 128. This distribution suggests that US and European filings carry the bulk of enforcement and freedom-to-operate risk for this technology area, with other jurisdictions seeing comparatively lighter coverage.
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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.
Nothing on this page constitutes an exhaustive prior-art, novelty, freedom-to-operate, or validity search, nor does it constitute legal, financial, investment, or professional advice, and it should not be relied upon as such. Any patent, commercial, or strategic decision should be verified independently and reviewed with qualified patent, legal, and domain professionals. Patsnap makes no warranties, express or implied, as to the accuracy, completeness, or fitness for any particular purpose of the information presented.
Machine translation. Assignee and organisation names originally recorded in Chinese, Japanese or Korean have been rendered into English by an AI translation step so that the tables stay readable. These renderings are best-effort and may not match a company’s registered English name; the original name is what the underlying patent record carries, and it is what any Eureka query launched from this page uses.