Battery patent filings show an accelerating race across LFP, solid state, silicon anodes, recycling, and early quantum energy storage white space.
By Seth Cronin, ipCapital Group
The IEA’s State of Energy Innovation 2026 report used one word to describe battery patenting: unprecedented.
That is not marketing language. The IEA is a technocratic institution staffed by economists and engineers who measure things for a living. When they reach for “unprecedented,” the data made them do it.
I spent the last several days pulling battery patent data from Minesoft’s global database – 140 million patents across every major jurisdiction. What came back confirmed the IEA’s read, but also revealed a few things the report doesn’t cover: who is actually winning, which technical bets are paying off, where the geography of this race is headed, and a wildcard that almost nobody in IP is talking about yet.
Here’s what I found.
In 2016, the global patent databases logged 38,719 battery technology family publications. By 2024, that number was 115,312. That is a 198% increase in eight years.
The acceleration is not linear. From 2016 to 2020, battery filings grew at roughly 12% per year – strong, but not unusual for a maturing technology. From 2020 to 2024, the growth rate roughly doubled. The post-COVID period, the passage of the Inflation Reduction Act, the EU Battery Regulation, and China’s full-throated industrial policy behind CATL’s supply chain all hit at the same time. The patent filing data reflects every one of those tailwinds.
Now compare that to the two other major clean energy categories.
Solar photovoltaic patents peaked in 2019 at 5,289 families and have been declining since. Solar PV is a mature technology – the core physics has been understood for decades, the manufacturing has commoditized, and the incremental improvement pace has slowed. By 2024, solar PV published just 3,490 families. Battery patents in a single year outnumber the entire solar PV portfolio published since 2016 by nearly three to one.
Wind patents are holding up better – about 15,500 families in 2024 – but wind has been essentially flat for a decade. Battery technology is not growing at the pace of wind. It is growing at a rate that makes wind look like a trend from a different era.
755,645 battery patent families have been published since 2015. That is not a niche technology finding its market. That is an infrastructure-defining industry in the middle of its defining decade.
Here is a finding that surprised me.
LG Energy Solution leads all global battery patent filers since 2021 with 55,071 published families. That is more than three times the count of the company most people assume is #1.
A little context: LG Energy Solution spun out of LG Chem in January 2021. The entity consolidates an IP operation that was built over more than two decades inside LG’s chemical and electronics divisions. The number reflects a deep, institutionalized battery IP function – one that was filing before most of its current competitors existed.
CATL comes in second in the raw count at 18,155 – but that number significantly undercounts their actual position. Two CATL-affiliated entities add another 17,447 families: Contemporary Amperex Technology Hong Kong Ltd (9,317) and Ningde Amperex Technology Ltd (8,130). Combine those three entities and CATL’s unified IP position is approximately 35,602 families, placing them squarely in LG Energy’s tier.
Samsung SDI is third at 15,980. Toyota is fourth at 11,391. Both are formidable but operate in a different tier.
Now look at what is not in the top ten.
Tesla. QuantumScape. Solid Power. None of them appear in the top 15. The US company that does show up – GM Global Technology at 3,816 families – is an automotive OEM filing battery system IP, not battery chemistry IP. No US-based pure-play battery company cracks the top ten.
The technology leadership in batteries is concentrated in South Korea, China, and Japan. The US is a consumer of battery technology. It is not yet a creator of it at scale.
The Inflation Reduction Act was designed to change this by pulling manufacturing back to North America. Patent filings lag investment by 12 to 18 months. The data from 2026 and 2027 will be the first real read on whether IRA capital is translating into IP position. The current picture is the before photo.
The battery patent universe is not monolithic. It fragments into distinct technical clusters, each with its own competitive dynamics, filing density, and growth trajectory.
LFP (Lithium Iron Phosphate) – 82,630 families since 2021
LFP is the largest cluster by a significant margin. The chemistry is mature, safe, cost-effective, and now dominant in Chinese EVs, commercial vehicles, and stationary storage. CATL and BYD control this space. For a new entrant, LFP is the most crowded room in battery IP. You are competing for incremental improvement claims against companies that have been filing here for fifteen years.
NMC/NCA Cathodes – 64,082 families
These high-energy-density cathodes power most Western and Korean EVs. A large and active cluster. The chemistry-level IP is locked up by the established players. The opportunity for new entrants is in specific configurations, second-generation compositions (NMC 811, NMC 9x), and manufacturing process IP.
Thermal Management – 62,882 families, growing fastest at +93%
This one surprised me. Thermal management – how you keep a battery pack from turning into a liability – is nearly as large as NMC/NCA, and it is growing faster than any other cluster: +93% from 2021 to 2025. The physics is simple: as packs scale up in vehicles, grid storage, and aviation, thermal dynamics become the critical engineering challenge. The IP is less consolidated than chemistry-level claims. Mechanical engineers and system architects can still establish meaningful positions here. If you are filing battery-adjacent IP and you have not looked at thermal management, look again.
Solid-State Electrolytes – 33,528 families
The consensus pick for “the future of batteries.” The data says the future is not here yet. Solid-state is about 40% the size of LFP. The growth rate is real – +71% since 2021 – and the biggest names are active: Toyota, Samsung SDI, Panasonic, a handful of Chinese universities, and the corporate backers of QuantumScape and Solid Power. But the cluster is still small enough that a well-placed foundational patent could matter in a way that is no longer possible in LFP.
Silicon Anode – 30,272 families
Silicon anodes promise roughly 10x the energy density of graphite anodes. The cluster is the smallest of the five, but it grew +86% since 2021. Amprius, Sila Nanotechnologies, and a dozen academic spinoffs are competing for position. The central engineering challenge – silicon expands dramatically during charge cycles, which causes the anode to crack – remains unsolved at commercial scale. Whoever solves it credibly will want to have filed before announcing.
The pattern is clear: the opportunity for new IP position is not in LFP or NMC, where the giants are entrenched. It is in thermal management (large and fast-growing), solid-state at the system level (growing, not yet dominated), and silicon anode (small but technically rich).
Of 507,315 battery patent families published globally since 2021, China accounted for 204,560 – 40.3% of the world’s battery IP output.
The United States? 69,164. 13.6%.
China holds a 3-to-1 advantage over the US in battery patent families. And this is not just volume. Chinese filers span chemistry, thermal management, manufacturing process, and system-level IP. It is a full-stack filing strategy, not a single bet on one technology.
South Korea (10.7%) and Japan (8.9%) are meaningful players. Europe’s EP filings (11.0%) show a presence, but they largely represent Asian companies seeking European coverage – not European-origin innovation.
The strategic implication is not abstract. Western companies building battery-dependent products – EVs, grid storage, aviation, industrial equipment – are operating in a landscape where the foundational IP is predominantly held by Chinese and Korean entities. Licensing exposure and supply chain risk are two sides of the same problem.
The IRA has begun pulling battery investment back to North America. Patent data lags investment by 12 to 18 months. We will not see whether that investment translated into IP position until 2026 or 2027 publications hit the databases. The current data is the before picture. The question is whether the after picture will look meaningfully different.
Three days ago, researchers published results on a quantum battery – a device that exploits quantum coherence to charge faster the larger it gets.
Classical physics says that should not be possible. Charging time in conventional batteries scales with size: bigger battery, longer charge. In the quantum system they built, that relationship inverts. The research is real. The results were published. The engineering path to commercialization is long, uncertain, and technically brutal.
But I ran the search: TAC=(quantum AND battery AND charging).
325 patent families. Total. All time.
Three hundred twenty-five families stand against a technology that – if it commercializes – would redefine what “fast charging” means. In the same database, conventional battery technology published 115,312 families in 2024 alone. Quantum battery IP is not sparse. It barely exists.
The filings that do exist are split across universities, government labs, and a handful of early-stage research groups. No major battery manufacturer is staking a serious position yet. The filings in 2024 and 2025 show a small uptick – 33 and 39 families respectively, against a baseline of roughly 17 per year since 2015 – but that is still noise, not signal.
That will change. When a breakthrough result gets public traction, IP filings follow within 12 to 24 months. If quantum battery science continues to validate – if the demonstrations scale, if the manufacturing path becomes visible – the window to establish foundational IP is measured in years, not decades.
The people watching this most closely right now should be university tech transfer offices, deeptech investors with quantum exposure, and any company that has built capabilities in quantum photonics or quantum sensing and is looking for an adjacent application.
For companies building battery technology, the question is not whether to file. It is where. LFP and NMC are rooms already full of Toyota, LG, and CATL. The better strategy is to identify the specific technical problem your approach solves and look for adjacent IP in thermal management, manufacturing, and system architecture. The differentiation may live in the integration, not the chemistry.
Patent velocity is a leading indicator of technology maturity, not a trailing one. Look at where the top filers are concentrating their new filings – not their accumulated portfolio. If CATL and Toyota are suddenly accelerating into silicon anode, they are telling you where they think the next generation of the market is going. Their filing patterns are public. Use them.
For acquirers, battery IP is not homogeneous. A portfolio built to protect a product is different from a portfolio built to shape a market. Count alone is a poor proxy for strategic value; the useful question is whether the portfolio maps to the technical bottleneck that makes the company valuable.
The quantum story is still early. That is the point. If the technology trajectory continues, the window to build a serious position before the field crowds may be brief.
Three things I take from this data.
Battery IP is the dominant innovation frontier in clean energy. 755,000 families since 2015. 115,000 in a single year. A 198% increase in eight years. The IEA called it unprecedented. The data earns that word.
Quantum energy storage is a rare early-stage white space. The science just arrived. 325 patent families stand against a technology that could redefine fast charging. The window to establish foundational IP is open. It will not stay open.
China’s structural advantage is a strategic risk that most Western companies have not priced into their decisions. China holds 40% of global battery families. The US holds 14%. If your product depends on batteries and your IP position does not reflect that reality, you have a gap. The better time to understand it was five years ago. The second-best time is now.
Data source: Minesoft Origin patent database, queried April 6, 2026. All counts are publication family groups. Queries: CPC=(H01M10) for battery; CPC=(H01L31*) for solar PV; CPC=(F03D*) for wind. Technology cluster queries: CPC=(H01M4/58*) LFP; CPC=(H01M4/525) NMC; CPC=(H01M10/613*) thermal; CPC=(H01M10/0562) solid-state; CPC=(H01M4/386) silicon anode. Quantum verification: TAC=(quantum AND battery AND charging). IEA source: State of Energy Innovation 2026. Quantum research: ScienceDaily, April 3, 2026.*
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Written by
Seth Cronin