VRFB SOC & Imbalance Monitoring Patent Snapshot 2026
The patent corpus for vanadium redox flow battery state-of-charge and imbalance monitoring is extremely small, with only 2 patent families in scope and all activity concentrated in a single dominant filer. The field is nascent, jurisdictionally spread across six offices, and presents substantial open space in measurement and sensing branches adjacent to the core electrochemical technology.
HydraRedox holds near-total control of a very early-stage niche
HydraRedox Tech Hldg is the clear leader in this niche, holding the top position in the applicant ranking. The corpus is so concentrated that the top five filers collectively account for all activity among the ranked applicants visible in this query.
There is no meaningful second tier: Sichuan Development Xingxin Vanadium Energy Technology is the only other identified filer, and the gap between the two players is substantial. This level of concentration is atypical even for nascent fields and signals that formal IP competition has not yet materialized.
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 1 | HydraRedox Tech Hldg | 9 | |
| 2 | Sichuan Development Xingxin Vanadium Energy Technology | 2 |
HydraRedox’s dominance implies that any new entrant would be entering a space where one incumbent has already staked out the primary electrochemical monitoring claims, making freedom-to-operate analysis essential before committing R&D resources.
The most recent filing periods are subject to publication lag and should be interpreted cautiously; the corpus as a whole reflects a very early-stage area where the total recorded activity may grow as pending applications publish.
Activity is confined to a single recent year, with electrochemical cell technology dominating the technology mix
The annual filing trend and technology composition charts together reveal a field that has produced virtually no sustained activity over the observed window, with technology focus tightly clustered in one primary IPC class.
Annual filing trend
All recorded filing activity falls in 2025, with zero activity in every prior year back to 2017. The 2026 data point reflects publication lag and should not be read as an absence of filings. This pattern is consistent with a topic that is either newly coined or newly the subject of formal patent strategy.
↗ Hover for values · click a bar to ask EurekaTechnology composition
H01M (batteries, cells, and fuel cells) accounts for the overwhelming share of the technology composition, confirming that filers are protecting core electrochemical system claims. G01N (material analysis and testing) and G01R (electric and magnetic measurement) each appear with a single patent record, marking them as sparsely covered adjacent branches.
↗ 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.
Redox flow battery system and method of controllin…
A novel multi cell stack architecture has specific features allowing deployment of simple electrical instrumentation of data collection/monitoring of crucial hydraulic, electrical and electrochemical quantities, on the basis of which the operator or electronic controller is able to gather/process critical information of such a depth and enhanced… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Redox flow battery system and method of controllin… | 18 |
| 2 | Redox flow battery system and method of controllin… | 10 |
| 3 | 氧化还原液流电池系统及控制其的方法 | 2 |
| 4 | Redox flow battery system and method of controllin… | 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.
HydraRedox Tech Hldg
HydraRedox Tech Hldg holds 9 patent records, concentrated in H01M 8 (fuel cell and flow battery stacks) and H01M 4 (electrodes), establishing the deepest electrochemical system coverage in this niche. Momentum data is not available in the evidence, so trajectory cannot be quantified, but the breadth of their multi-jurisdiction filing pattern signals a deliberate IP-building strategy.
patent records: 9Sichuan Development Xingxin Vanadium Energy Technology
Sichuan Development Xingxin Vanadium Energy Technology holds 2 patent records, with coverage spanning H01M 8, G01N 21 (optical material analysis), and G01R 31 (electrical measurement and testing). This broader IPC footprint, though modest in absolute size, touches the adjacent sensing branches that are otherwise sparsely covered, making them the only filer with a presence in the measurement white-space areas.
patent records: 2Frequently asked questions
The corpus contains 2 patent families in scope. This is an extremely small body of formal IP, indicating the topic is nascent and has not yet attracted broad patenting activity.
HydraRedox Tech Hldg is the leading filer by a substantial margin, holding 9 patent records. The only other identified applicant is Sichuan Development Xingxin Vanadium Energy Technology with 2 patent records.
China leads by patent records, followed by Australia, Europe (EPO), and the United States, with India and WIPO (PCT) also represented. The spread across six offices reflects a multi-jurisdiction protection strategy by the visible filer.
H01M (batteries, cells, and fuel cells) is the visible class. G01N (material analysis and testing) and G01R (electric and magnetic measurement) each have one patent record, making them sparsely covered adjacent branches.
No co-applicant or consortium filing relationships are recorded in the available evidence. The field has not yet developed the collaborative IP structures that are common in more mature energy storage domains.
G01N (material and spectroscopic analysis) and G01R (electrical and magnetic measurement) are the two sparsely covered adjacent branches identified in the evidence. Both have plausible technical relevance to non-invasive VRFB SOC and imbalance detection, but any entry should be preceded by freedom-to-operate analysis against the existing records in those classes.
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.