BESS Cobalt-Free Sodium-Ion Battery Patent Snapshot
The patent corpus for cobalt-free and sodium-ion battery energy storage systems (BESS) is at its earliest formative stage, with only 2 patent families on record, both filed in China between 2023 and 2024. Two new-entrant applicants hold equal footing in a space where meaningful prior art remains sparse and defensible positions are still wide open.
Two filers share the entire nascent corpus equally
The corpus stands at 2 patent families in scope, with Wenzhou Natech New Energy Tech Co Ltd and Enli New Energy Technology (Beijing) Co Ltd each holding 1 patent family — a complete tie at the top of the ranking.
The top five filers account for 100% of the combined total of the ranked applicants visible in this query, a concentration figure that reflects the near-absence of prior art rather than the dominance of an established incumbent. There is no tier gap because there is effectively only one tier.
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 1 | Wenzhou Natech New Energy Tech Co Ltd | 1 | |
| 2 | Enli New Energy Technology (Beijing) Co Ltd | 1 |
The equal footing of both leaders implies that neither has built a protective moat. Any well-resourced entrant filing a coherent patent family today could immediately join the front rank of this technology space.
All filing activity occurred in 2023 and 2024; the 2025 and 2026 data points reflect normal publication lag and should not be read as a halt in activity. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Activity confined to 2023–2024; electrochemistry dominates the technology mix
The annual filing trend and technology composition charts together describe a field that has only just begun to attract formal IP activity, with both filings clustered in the most recent countable years and the technology mix anchored in core electrochemical cell classes.
Annual filing trend
Zero activity is recorded from 2017 through 2022; one family appeared in 2023 and one in 2024. The 2025 and 2026 data points show zero, which is consistent with normal 18–24 month publication lag and does not indicate a slowdown. The field’s entire patent history fits within two calendar years.
↗ Hover for values · click a bar to ask EurekaTechnology composition
Both patent families fall under H01M (Batteries, cells and fuel cells), confirming that the work is squarely within electrochemical energy storage. A secondary classification under C01C (Ammonia, cyanides and nitrogen compounds) appears in one family, suggesting at least one filing addresses electrode or electrolyte precursor chemistry — an observation consistent with sodium-ion material development.
↗ 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.
一种表面钝化的普鲁士蓝类似物的制备方法及储能装置
本发明属于钠离子电池正极材料技术领域，具体涉及一种表面钝化的普鲁士蓝类似物的制备方法及储能装置。本发明采用简易的共沉淀方法，在普鲁士蓝类似物中引入表面钝化金属离子以调控表面形貌。表面钝化后的铁基普鲁士蓝类似物展现出良好的空气稳定性，同时在高面载下展现出优异的电化学性能。该发明工艺流程简便，成本低廉，设计的高面载电极材料在钠离子电池储能系统中符合实际工业化生产，具有较强的商业实用性。 (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | 一种混合电池及混合电池运行方法 | 1 |
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.
Assignee snapshot from the current evidence set
The applicants below are visible in this query result. Because the evidence set is relatively small, read this section as a directional snapshot rather than a full competitive ranking.
Wenzhou Natech New Energy Tech Co Ltd
Holds 1 patent family and is classified as a new entrant with a trend of new entrant momentum. Their technology focus spans C01C 3 (nitrogen compound / precursor chemistry), H01M 10 (secondary cells), and H01M 4 (electrodes), suggesting work that integrates both material synthesis and cell-level engineering — a broader technical footprint than the other current filer.
families: 1Enli New Energy Technology (Beijing) Co Ltd
Also holds 1 patent family with identical new entrant momentum. Technology focus is concentrated in H01M 10 (secondary cells) and H01M 12 (regenerative / hybrid cells), indicating a cell-systems orientation rather than upstream material chemistry. The H01M 12 classification is consistent with hybrid battery configurations, aligning with the top-cited work on mixed battery operation methods.
families: 1Frequently asked questions
The current corpus contains 2 patent families in scope, both filed in China in 2023 and 2024. This is an exceptionally small body of prior art, indicating the technology intersection is at an early, pre-competitive IP stage.
Wenzhou Natech New Energy Tech Co Ltd and Enli New Energy Technology (Beijing) Co Ltd each hold 1 patent family and are the only identified filers to date. Both are classified as new entrants with filings appearing only in the most recent two countable years.
Based on the available evidence, all 2 patent families are filed exclusively in China. No filings have been identified in the United States, Europe, Japan, South Korea, or any other jurisdiction, leaving major markets currently without prior art in this specific combination.
The two families are classified under H01M (Batteries, cells and fuel cells) and, for one family, under C01C (Ammonia, cyanides and nitrogen compounds). No filings currently address power management (H02J), cell packaging (H01M 50), or other adjacent structural and systems classes.
The evidence shows no co-applicant filings or collaborative arrangements in this corpus. Both families were filed independently by single assignees. No consortium, university, or cross-industry partnerships have been identified.
Filing activity was zero from 2017 through 2022, with a single family appearing in each of 2023 and 2024. The 2025 and 2026 data points reflect publication lag rather than a halt. The overall picture is one of a technology that has only very recently begun to attract formal IP attention, with the field’s trajectory still undetermined.
Built on Patsnap Open Platform
This report’s underlying patent dataset — filings, assignees, technology clusters — is open for developers via MCP and REST API. Free to start, 10,000 credits, no credit card required.
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.