Modular Vanadium Redox Flow Battery (VRFB) containerized energy storage system designed for remote off-grid mining microgrids. Featuring power-energy decoupled architecture, inherently safe aqueous vanadium electrolyte, ultra-long cycle life and multi-hour continuous discharge capability. Compatible with our wind & storage converter for long-duration wind energy shifting, mine black start and critical load backup, ideal for desert & plateau mining EPC projects.
Modular Vanadium Redox Flow Battery (VRFB) Energy Storage System
- - **Long-Duration Energy Storage**
- Modular VRFB supports multi-hour continuous discharge, helping remote mining sites stabilize power supply during low-wind periods.
- - **Inherently Safe Aqueous Electrolyte**
- Vanadium electrolyte is non-flammable and free from thermal runaway risk, making it suitable for mining sites with strict fire safety requirements.
- - **Power & Energy Decoupling**
- Energy capacity can be extended independently by adding electrolyte tanks, giving flexible customization for 4-hour to 12-hour long-duration scenarios.
- - **Ultra-Long Service Life**
- VRFB typically offers 15,000+ deep cycles and a 20+ year design life, with stable performance and low long-term replacement cost in harsh mining environments.
Modular Vanadium Redox Flow Battery (VRFB) Energy Storage System
Our modular Vanadium Redox Flow Battery (VRFB) energy storage system is a long-duration, inherently safe containerized energy storage solution engineered for off-grid mine wind-storage hybrid microgrid projects. The system stores energy within liquid vanadium electrolyte, separating power stack and energy storage tanks. It supports long-duration discharge, ultra-long cycle life, no thermal runaway risk, and stable operation under harsh mining environments. This VRFB ESS can be fully integrated into our complete mine renewable EPC package together with wind & storage converter, isolation transformer, step-up transformer and medium/high voltage switchgear for long-duration energy shifting and mine microgrid stabilization.
System Connection & Working Principle
Main Purpose: The VRFB system captures surplus wind energy and delivers stable, long-duration power output for mining facilities during low wind periods. It offers multi-hour continuous power supply, wind power smoothing, black start capability and frequency/voltage stabilization for remote mine microgrids.
- Upstream / DC Side of VRFB System: DC cables connect the VRFB stack to the DC bus of Wind & Storage Converter. The system charges and stores excess wind energy in vanadium electrolyte tanks.
- Downstream Power Flow: DC power flows from VRFB stacks into Wind & Storage Converter for DC/AC conversion → Isolation Transformer → Step-up Transformer → MV / 35kV / 66kV Switchgear → Mine end loads (Ore processing plant, mine camp, critical safety equipment).
System Topology: Wind Turbine + Modular VRFB Energy Storage → Wind & Storage Converter → Isolation Transformer → Step-up Transformer → MV/35kV/66kV Switchgear → Mine Loads
Technical Parameters
| Storage Technology | Vanadium Redox Flow Battery (VRFB), all-vanadium aqueous electrolyte |
| Power & Energy Design | Power and energy fully decoupled; adjust energy capacity by adding electrolyte tanks |
| Single Module Rated Power | 250kW / 500kW / 1MW (modular parallel expansion) |
| Typical Discharge Duration | 4~12 hours customizable |
| Round Trip Efficiency | 75% ~ 85% |
| Operating Ambient Temperature | -20℃ ~ +50℃, stable for desert & plateau mining |
| Enclosure Protection Grade | IP54 / optional IP65, dust and sand resistant |
| Cycle Life | ≥15,000 cycles, nearly zero capacity degradation during service life |
| Design Service Life | 20+ years, electrolyte reusable and recyclable |
| Built-in System | Cell stacks, electrolyte storage tanks, circulation pumps, BMS, EMS, leak monitoring & fire safety system |
| Communication Protocol | Modbus, IEC 61850, TCP/IP |
| Certification | IEC 62932, IEC 61508, CE |
Application Scenarios & Industries
- Off-grid remote open-pit mine wind-storage microgrid, multi-hour long-duration power supply
- Long-duration wind energy shifting, smooth wind fluctuation for mineral processing plant
- Black start & long-time emergency backup for critical mine safety equipment
- Reduce diesel generator runtime and cut carbon emissions for isolated mining sites
- Plateau, desert and high-temperature mining projects with strict fire safety requirements
- Large scale renewable microgrid, island power, oil & gas field off-grid power supply
Core Advantages
- Inherently safe design: Aqueous vanadium electrolyte, no thermal runaway, no fire or explosion risk, perfect for mining site safety regulations.
- Power & energy decoupled: Easily extend discharge hours by adding electrolyte tanks, ideal for long-duration energy storage demand.
- Ultra-long service life: ≥20 years design life, 15,000+ deep cycles with minimal capacity fade, low long-term replacement cost.
- Harsh environment adaptability: Stable performance under wide temperature range, resistant to dust, sand and high ambient temperature.
- Full recyclable electrolyte: Vanadium electrolyte can be fully recovered and reused at end-of-life, low waste and good carbon footprint.
Product Features
- Modular containerized architecture, multiple modules parallel connection for MW-scale expansion
- Independent cell stacks and liquid electrolyte storage tanks, flexible capacity customization for multi-hour discharge
- Built-in circulation pump system, electrolyte leak detection and continuous status monitoring
- Intelligent EMS energy management system, optimizes charge/discharge strategy with wind turbine generation
- Factory pre-assembled and pre-tested, reduce site installation and commissioning workload
- Supports off-grid island mode, black start, long-duration peak shifting and voltage/frequency stabilization
FAQ
Q1: How does VRFB connect within mine wind-storage microgrid?
A: VRFB connects on DC side to DC bus of wind & storage converter. It stores surplus wind power in liquid vanadium electrolyte and releases continuous multi-hour power when wind generation drops. Power flows through converter, isolation transformer, step-up transformer and medium voltage switchgear to mining loads.
Q2: What is the key difference between VRFB and LiFePO4 container ESS?
A: VRFB is optimized for long-duration energy storage (4h+) with excellent intrinsic safety and 20+ year lifespan. LiFePO4 liquid cooled ESS is better for high peak power, fast response, short/medium duration discharge. For mine projects, VRFB is recommended if you require multi-hour continuous power and strict fire safety control.
Q3: Can we extend energy capacity after project commissioning?
A: Yes. VRFB power stacks and energy storage are decoupled. To increase discharge hours or total energy capacity, you only add electrolyte tanks and vanadium liquid without replacing power stacks.
Q4: Is VRFB suitable for hot desert mining environment?
A: Yes. The aqueous electrolyte system works stably in wide temperature range, no thermal runaway risk. We provide IP54/IP65 dust & sand protection for mining site deployment.
Q5: What certifications are available for mining tender?
A: IEC 62932, IEC 61508, CE test reports, FAT documents, operation manual and technical datasheet for tender submission.
Q6: Typical lead time?
A: Standard modular VRFB system: 12–16 weeks, subject to power/energy configuration and customized requirements.
Get in touch
Have a project in mind ? Send us your ore assay report, mine location and target capacity. Our mining engineers will prepare a customized process design, equipment list and quotation within 48 hours.