Sodium-Ion Battery Fast Charging Patent Landscape 2026
Sodium-Ion Battery Fast Charging Patent Landscape in 2026
The sodium-ion battery fast charging patent corpus is at a very early stage, with only 3 patent families in scope, all filed in 2024 and all originating from China. Three applicants hold one family each, signaling that no dominant player has yet consolidated this space.
Three applicants, each with one family — no dominant player yet
The sodium-ion battery fast charging landscape contains 3 patent families in scope. Jiangsu Chuanyi Sodium Battery Technology, Guoke Tanmei New Materials (Huzhou), and Guangdong University of Technology each hold exactly one family, placing them in a fully level first tier.
The top five filers account for 100% of the hundred largest filers’ combined total — a figure that here simply reflects how small and nascent the corpus is, rather than any meaningful concentration by an established leader.
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 1 | Jiangsu Chuanyi Sodium Battery Technology Co., Ltd. | 1 | |
| 2 | Guoke Tanmei New Materials (Huzhou) Co., Ltd. | 1 | |
| 3 | Guangdong University of Technology | 1 |
The equal standing of all three applicants means there is no incumbent IP barrier to new entrants; any organization developing fast-charging sodium-ion technology today would be entering on roughly equal footing with those already filing.
Because all three families were filed in 2024, and patent applications typically face an 18-month publication lag, the true scope of current activity may be meaningfully larger than these figures indicate. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Activity concentrated entirely in 2024; core battery IPC class dominates
The filing trend and technology composition charts together characterize a corpus that emerged suddenly in a single year, with a technology mix anchored in battery cell fundamentals and modest secondary coverage in materials and power management.
Annual filing trend
Zero recorded filings appear across 2017–2023; all 3 patent families are attributed to 2024. The 2025–2026 bars show zero, but this almost certainly reflects publication lag rather than a genuine halt in activity — any applications filed after mid-2023 may not yet have published.
↗ Hover for values · click a bar to ask EurekaTechnology composition
H01M (batteries, cells, and fuel cells) covers all 3 families, confirming that core electrochemical cell design is the primary technical focus. C01B (non-metallic elements and inorganic compounds, linked to hard-carbon anode materials) and H02J (power supply and grid systems, linked to charging protocol) each appear once, indicating early but limited attention to materials synthesis and charging-system integration.
↗ 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.
一种钠离子电池快充充电控制方法及系统
本发明涉及钠离子电池快充技术领域，具体为一种钠离子电池快充充电控制方法及系统；通过量化分析钠离子储能电池各点位的温度差异以判断钠离子储能电池的温度极化状态，并据此得到温度极化表现值，能够全面反映温度分布状态；通过绘制电压曲线图，识别出存在的非线性特征，并将其进行量化分析以准确衡量电压极化偏差，得到电极化表现值；能够全面反映电压极化状态；通过温度极化表现值和电压极化表现值进行综合分析以评估钠离子储能电池的快充策略调控需求，并据此计算得到充电电流调整值，能够实时调整充电电流，确保快充策略符合当前电池状态，调整充电电流后，维持固定时长，再次评估调控值，确保调整的有效性和安全性。 (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | 一种钠电用煤基硬炭负极材料及其制备方法和钠离子电池 | 4 |
| 2 | 一种钠离子电池快充电解液及钠离子电池 | 2 |
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 in sodium-ion fast charging
With only 3 patent families and all three applicants entering in the same year, the competitive and technical signals are directional rather than statistically robust. The observations below should be read as early indicators.
Pre-commercial, emergence stage
The lifecycle stage cannot be formally determined from 3 families, but the corpus profile — zero filings before 2024, all applicants classified as new entrants, and no citation depth — is consistent with an emergence-stage technology. R&D investment now would precede any consolidation phase. The publication lag caveat is especially important here: the actual filing wave may already be broader than visible.
EmergenceFully fragmented — no IP incumbent
Each of the three applicants holds exactly one patent family. There is no tier gap, no portfolio leader, and no assignee that has staked out a defensible IP position. This is unusually open for an energy-storage sub-field, and it means that a focused filing program over the next 12–24 months could establish first-mover claim depth before the space densifies.
Low concentrationNo co-applicant activity recorded
The evidence shows no co-assigned or jointly filed patent families in this corpus. Each applicant has filed independently. This absence of collaboration may reflect the early stage of the field rather than a deliberate strategy; as the technology matures, university-industry partnerships — already present in nascent form with Guangdong University of Technology — could become a route to faster capability development.
No collaboration recordedChina-only jurisdiction coverage so far
All 3 patent families are filed and published in China. No PCT, EPO, US, or other national office filings are recorded. This leaves fast-charging sodium-ion IP largely unprotected in the major battery markets outside China. For organizations with global commercialization intent, filing in additional jurisdictions represents an open path with minimal blocking risk from existing holders.
China onlyGo 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.
Three equal-footing new entrants, each with a distinct technical focus
All three ranked applicants entered the sodium-ion fast charging patent corpus in 2024 as new entrants with one family each. Their technology emphases, however, differ and suggest distinct R&D angles.
Jiangsu Chuanyi Sodium Battery Technology
Holds 1 patent family with dual IPC coverage across H01M 10 (battery cell design) and H02J 7 (charging and power management systems), suggesting an integrated approach that links cell chemistry with fast-charging protocol. Entered the corpus as a new entrant in 2024.
families: 1Guoke Tanmei New Materials (Huzhou)
Holds 1 patent family with the broadest IPC spread of the three: C01B 32 (carbon-based inorganic compounds, consistent with hard-carbon anode synthesis), H01M 10, and H01M 4 (electrode materials). This materials-first orientation is consistent with the most-cited topic in the corpus — coal-based hard-carbon anode materials for sodium-ion batteries. Entered as a new entrant in 2024.
families: 1| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| Jiangsu Chuanyi Sodium Battery Technology Co., Ltd. | 1 | ▲ new entrant |
| Guangdong University of Technology | 1 | ▲ new entrant |
| Guoke Tanmei New Materials (Huzhou) Co., Ltd. | 1 | ▲ new entrant |
Under-served adjacent branches worth monitoring
Given the very small corpus size, formal white-space analysis is not statistically robust. The IPC coverage observed does, however, highlight two adjacent branches that are sparsely represented relative to their technical relevance to sodium-ion fast charging.
H02J 7 · Charging systems and protocols
Only one of the three families extends into H02J 7 (power supply and charging-circuit management). Fast-charging performance in sodium-ion cells depends heavily on charging algorithms, thermal management during rapid charge, and battery management system integration — areas covered by H02J. The sparse coverage here suggests that charging-system IP, as distinct from cell chemistry IP, remains largely unaddressed and could be a tractable entry point for power-electronics or BMS-focused organizations.
Search this in Eureka →C01B 32 · Hard-carbon and anode material synthesis
Only Guoke Tanmei has filed under C01B 32, which covers the synthesis of non-metallic carbon compounds — the class most directly relevant to hard-carbon anode development, a key enabler of sodium-ion fast charging. The most-cited topic in the corpus (coal-based hard-carbon anode materials) points to recognized technical importance, yet IP coverage in this branch remains a single family. Organizations with expertise in carbon materials or precursor chemistry could file in this space with minimal blocking risk.
Search this in Eureka →How the three applicants differ by technology route
Strength of each leader across the main technology routes.
| Player | H01M 10 · Batteries, cells & fuel cells | C01B 32 · Non-metallic elements & inorganic compounds | H01M 4 · Batteries, cells & fuel cells | H02J 7 · Power supply & grid systems |
|---|---|---|---|---|
| Guoke Tanmei New Materials (Huzhou) Co., Ltd. | Strong · 1 | Strong · 1 | Strong · 1 | Absent |
| Jiangsu Chuanyi Sodium Battery Technology Co., Ltd. | Strong · 1 | Absent | Absent | Strong · 1 |
| Guangdong University of Technology | Strong · 1 | Absent | Absent | Absent |
Frequently asked questions
The current corpus contains 3 patent families in scope, all filed in 2024 and all originating from China. The small size reflects the very early stage of dedicated fast-charging IP in sodium-ion technology.
Jiangsu Chuanyi Sodium Battery Technology, Guoke Tanmei New Materials (Huzhou), and Guangdong University of Technology each hold one patent family. No applicant has established a lead position.
China accounts for all 3 patent families. No filings in the US, EP, PCT, or other jurisdictions are recorded in this corpus, leaving sodium-ion fast charging IP uncovered outside China.
H01M (batteries, cells, and fuel cells) is present in all 3 families. C01B (non-metallic elements and inorganic compounds, relevant to hard-carbon anode materials) and H02J (power supply and charging systems) each appear in one family, indicating limited but present coverage of materials and charging-protocol dimensions.
No co-assigned or jointly filed families are recorded in the corpus. All three applicants have filed independently. This may reflect the nascent state of the field rather than a deliberate avoidance of partnerships.
The most-cited topic relates to coal-based hard-carbon anode materials and their preparation methods for sodium-ion batteries, followed by a sodium-ion battery fast-charging electrolyte formulation. These two topics point to anode materials and electrolyte chemistry as the primary technical focal points among current filers.
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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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