Lithium-Ion Battery Fast Charging Patent Landscape
Lithium-Ion Battery Fast Charging Patent Landscape in 2026
The lithium-ion battery fast charging patent field is in a growth phase, with the top five filers accounting for nearly half of output among the hundred largest applicants and Yazami IP Pte Ltd holding the leading position. Activity expanded on a multi-year basis even as annual volume eased from its 2021 peak, signalling a field still attracting new entrants but approaching technical consolidation around electrochemical cell design and charging-circuit control.
A concentrated field led by Yazami IP, with Stanford close behind
Yazami IP Pte Ltd leads
The top five filers — Yazami IP, Stanford, Chongqing Talent New Energy, GoPro, and BYD — jointly hold 46 percent of the combined total of the hundred largest applicants, indicating a moderately concentrated competitive structure with a visible gap between the top tier and the rest of the field.
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 1 | Yazami IP Pte Ltd | 9 | |
| 2 | Board of Trustees of the Leland Stanford Junior University | 7 | |
| 3 | Chongqing Talent New Energy Co Ltd | 4 | |
| 4 | GoPro Inc | 4 | |
| 5 | BYD Co Ltd | 2 | |
| 6 | Hefei Qianrui Technology Co Ltd | 2 | |
| 7 | Zhejiang Xinan Chemical Industrial Group Co Ltd | 2 | |
| 8 | Tsinghua University | 2 | |
| 9 | ZJU HANGZHOU GLOBAL SCI & TECH INNOVATION CENT | 2 | |
| 10 | Luo Fuying | 1 |
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 11 | University of North Dakota | 1 | |
| 12 | Shenzhen Capchem Technology Co Ltd | 1 | |
| 13 | Capital Normal University | 1 | |
| 14 | Shanghai Jiao Tong University | 1 | |
| 15 | National University of Defense Technology | 1 | |
| 16 | NANJING UNIV OF AERONAUTICS & ASTRONAUTICS | 1 | |
| 17 | Naili (Liaoning) New Material Technology Co Ltd | 1 | |
| 18 | Guizhou Jiaying Technology Co Ltd | 1 | |
| 19 | Shanghai University | 1 | |
| 20 | Jiangsu Guoxuan New Energy Technology Co Ltd | 1 |
The dominance of Yazami IP in power-supply and charging-circuit patents, combined with Stanford’s deep focus on cell-level electrochemistry, suggests that the two leading positions are differentiated by technology route rather than direct overlap — meaning challengers may need to address both layers to compete broadly.
Filing counts for 2025 and 2026 are understated due to patent publication lag and should not be read as a slowdown; the full scope of recent activity will become visible as applications publish. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Multi-year growth with a 2021 peak and a technology mix anchored in cell and circuit patents
The filing trend and technology composition charts together reveal a field that expanded sharply through 2021 and has since settled at a sustained but lower annual rate, with H01M battery-cell patents forming the dominant technical foundation and adjacent branches remaining sparse.
Annual filing trend
Filings were negligible before 2019, surged to a peak in 2021, then eased to a steady level through 2023–2025; the 2025 and 2026 bars undercount true activity due to publication lag and should be treated as floor estimates rather than confirmed totals.
↗ Hover for values · click a bar to ask EurekaTechnology composition
H01M (batteries, cells and fuel cells) dominates the branch mix, followed by H02J (power supply and grid systems) and G06F (digital data processing), reflecting that fast-charging innovation concentrates on cell-level chemistry and charging-protocol electronics; all remaining branches hold only one or two records each, indicating broad white space outside the core.
↗ 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.
一种锂离子电池快充负极材料及其制备与应用
一种锂离子电池快充负极材料及其制备与应用，属于锂离子电池技术领域。锂离子电池快充负极材料选自含锂的层状钙钛矿氧化物、含钠的层状钙钛矿氧化物或含钾的层状钙钛矿氧化物中的一种；锂离子电池快充负极材料为钛、铌基钙钛矿Ruddlesden-Popper结构，其化学式为A’ 2A n-1B nO 3n+1或A’ 2A n/2B nO 3n+1；其中，A’选自Li、Na或K中的一种或几种，A选自Y、La、Ca、Sr或Ba中的一种或几种，B选自Ti或Nb中的一种或两种；n为1以上的正整数。层状钙钛矿氧化物作为锂离子电池负极材料具有较低的安全工作电压（小于1V），较高的比容量，同时在常温（25℃）和低温（-30℃）下具有良好的倍率性能和循环稳定性。 (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | 一种可预防析锂的锂离子电池快速充电方法 | 66 |
| 2 | 一种基于多目标优化的锂离子电池快速充电方法 | 10 |
| 3 | 一种可预防析锂的锂离子电池快速充电方法 | 8 |
| 4 | 一种锂离子电池快速充电控制方法及系统 | 7 |
| 5 | 一种基于动态规划的锂离子电池快速充电方法及系统 | 7 |
| 6 | 一种锂离子电池 | 6 |
| 7 | 一种锂离子电池快速充电方法和锂离子电池 | 5 |
| 8 | 锂离子电池快充标定设备及方法 | 4 |
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 a growth-stage lifecycle, moderate concentration, limited cross-border protection, and narrow technology breadth creates distinct strategic entry and differentiation options for engineering teams.
Growth stage, easing from 2021 peak
The field is classified as Growth: recent three-year filings sit well above the prior three-year window, confirming multi-year expansion, but annual volume has eased from its 2021 peak. New entrants are still arriving — all tracked momentum players entered the corpus recently — so the window for foundational positioning has not closed, but the core electrochemical and circuit-control space is becoming more crowded.
Growth · post-peakTop two hold a commanding lead; mid-tier is thin
Yazami IP and Stanford together account for roughly 30 percent of the top-100 filers’ combined output, and the top five reach 46 percent. Below rank five, most applicants hold only one or two patent families, meaning the mid-tier offers limited blocking power. A focused portfolio of four to six strategically placed families could realistically enter the visible ranking.
Moderate concentrationOne confirmed co-filing pair: Zhejiang Xinan Chemical and ZJU Hangzhou Innovation Center
The only recorded co-applicant relationship in the corpus links Zhejiang Xinan Chemical Industry Group with Zhejiang University Hangzhou Global Science and Technology Innovation Center, with two jointly filed patent families. This industry-university pairing on materials chemistry suggests that collaborative R&D between chemical manufacturers and academic labs is an emerging but still rare model in this space.
Nascent collaborationChina dominates filings; US and PCT provide secondary coverage
China is the lead filing office, followed by the United States, WIPO PCT, and the European Patent Office. Japan, India, Canada, and Germany each hold a small number of records. The concentration of filings in China reflects both the location of major applicants and the strategic importance of the Chinese EV and consumer-electronics market; PCT and EPO filings signal that the leading players are pursuing international protection but coverage outside Asia and North America remains thin.
China-led · partial globalGo 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 |
|---|---|---|
| Zhejiang Xinan Chemical Industrial Group Co Ltd | Zhejiang University Hangzhou Global Science and Technology Innovation Center | 2 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
Yazami IP leads on charging circuits; Stanford leads on cell electrochemistry
The two leading applicants approach fast charging from complementary technical angles, making direct head-to-head comparison less meaningful than understanding which layer of the charging stack each controls.
Yazami IP Pte Ltd
Yazami IP holds 9 patent families, the largest position in the corpus, with a primary focus on H02J 7 (power-supply and charging-circuit systems) and secondary coverage in H01M 10 (cell-level battery technology) and B60L 53 (EV charging). The entity entered the tracked window as a new entrant, indicating that its current leadership was established quickly rather than built incrementally.
families: 9Stanford University
Stanford holds 7 patent families, concentrated in H01M 10 and H01M 4 (cell and electrode electrochemistry) with a single entry in C07C 43 (organic compounds), reflecting a materials and cell-science orientation distinct from Yazami’s circuit focus. Like Yazami IP, Stanford entered the tracked window as a new entrant, suggesting recent and rapid portfolio build-up rather than a long-established presence.
families: 7| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| Yazami IP Pte Ltd | 1 | ▲ new entrant |
| Board of Trustees of the Leland Stanford Junior University | 7 | ▲ new entrant |
| GoPro Inc | 1 | ▲ new entrant |
| Chongqing Talent New Energy Co Ltd | 4 | ▲ new entrant |
| Zhejiang Xinan Chemical Industrial Group Co Ltd | 2 | ▲ new entrant |
| Zhejiang University Hangzhou Global Science and Technology Innovation Center | 2 | ▲ new entrant |
| Hefei Qianrui Technology Co Ltd | 1 | ▲ new entrant |
Under-served branches worth monitoring
Several IPC branches adjacent to the dominant H01M core carry very low patent counts, representing areas where technical activity has been limited relative to the scale of the broader problem space; these observations should be validated against commercial need and freedom-to-operate before any R&D commitment.
G06N · AI and machine learning models for fast charging
Only 4 patent records fall under G06N (computing based on AI models), making it the largest of the sparse adjacent branches. Applying machine-learning approaches to adaptive charging-protocol optimization — adjusting current profiles in real time based on cell state — is technically plausible given the data-rich nature of battery management systems, and the low existing count suggests limited prior art to design around. Entry would likely require cross-disciplinary teams spanning battery electrochemistry and ML engineering.
Search this in Eureka →B60L · EV-integrated fast charging systems
Only 1 patent record sits in B60L (electric vehicle propulsion), despite EV fast charging being a primary commercial driver for this technology. The sparsity may reflect that EV-specific charging IP is filed under H02J or H01M by most applicants, but it also suggests an under-served niche around on-board charging hardware integrated with vehicle powertrains. Teams with both battery and automotive powertrain expertise would have a realistic entry path.
Search this in Eureka →How leading applicants differ by technology route
Strength of each leader across the main technology routes.
| Player | H01M 10 · Batteries, cells & fuel cells | H02J 7 · Power supply & grid systems | H01M 4 · Batteries, cells & fuel cells | G06F 30 · Electric digital data processing | G06F 17 · Electric digital data processing |
|---|---|---|---|---|---|
| Board of Trustees of the Leland Stanford Junior University | Strong · 7 | Absent | Strong · 6 | Absent | Absent |
| Chongqing Talent New Energy Co Ltd | Strong · 4 | Moderate · 2 | Absent | Moderate · 2 | Strong · 3 |
| Yazami IP Pte Ltd | Moderate · 2 | Strong · 7 | Absent | Absent | Absent |
| Yazami LP Pte Ltd | Strong · 2 | Strong · 3 | Absent | Absent | Absent |
| GoPro Inc | Strong · 4 | Absent | Absent | Absent | Absent |
| BYD Co Ltd | Strong · 2 | Strong · 2 | Absent | Absent | Absent |
| Hefei Qianrui Technology Co Ltd | Strong · 2 | Absent | Absent | Absent | Absent |
Frequently asked questions
Yazami IP Pte Ltd leads with 9 patent families, followed by the Board of Trustees of the Leland Stanford Junior University with 7. These two entities together represent the strongest individual positions in the corpus.
The top five filers — Yazami IP, Stanford, Chongqing Talent New Energy, GoPro, and BYD — account for 46 percent of the combined total of the hundred largest applicants, indicating moderate concentration with a clear gap between the top tier and a long tail of single-family holders.
The field is classified as Growth. Recent three-year filing volume sits well above the prior three-year window, confirming multi-year expansion. Annual volume eased from its 2021 peak, but publication lag means the most recent years are understated; the field has not entered decline.
China is the leading filing office, followed by the United States, WIPO PCT, and the European Patent Office. Japan, India, Canada, and Germany each hold smaller counts. Protection outside China and North America is limited across the corpus.
H01M (batteries, cells and fuel cells) is the dominant branch, followed by H02J (power supply and grid systems) and G06F (digital data processing). All other IPC branches in the corpus hold four or fewer records, confirming that innovation concentrates on cell-level chemistry and charging-circuit control.
The sparsest adjacent branches are G06N (AI and machine learning models, 4 records), C01G (compounds of other metals, 2 records), and B60L (electric vehicle propulsion, 1 record). These low counts indicate limited prior art, though technical feasibility and commercial fit should be assessed independently before committing R&D resources.
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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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