Vanadium Titanium Flow Battery
Working principle of Vanadium Redox Battery (VRB)
Vanadium Redox Battery (Vanadium Redox Battery, abbreviated as VRB) is a REDOX battery energy storage system based on vanadium metal. The electric energy of the vanadium battery is stored as chemical energy in sulfuric acid electrolyte of vanadium ions of different valence states, and the electrolytic hydraulic pressure is put into the battery pile through an external pump. Under the action of mechanical power, it circulates in different liquid storage tanks and the closed loop of the half battery. The proton exchange membrane is used as the diaphragm of the battery pack, and the electrolyte solution flows parallel to the electrode surface and electrochemical reaction occurs. An electric current is collected and conducted through a double electrode plate, thus converting chemical energy stored in solution into electrical energy. This reversible reaction process enables the vanadium battery to be successfully charged, discharged and recharged.
Comprehensive Advantages of VRB
- Technological Advantage
Operation at normal temperature and pressure, active heat management, no risk of fire or explosion sOC(charge state) can easily measure and control the number of charge and discharge cycles up to 10,000 times (100% DOD) can be maintained for a long time after full charge, very low self-discharge rate, Self-discharge is almost negligible can be easily expanded by replacing the electrolyte tank and increasing the electrolyte mixing does not lead to electrolyte pollution The unguarded design makes maintenance costs extremely low PCS can operate in four quarters, sustainable supply of reactive power when needed The electrolyte life is unlimited, the system residual value is high
- Environmental Advantage
No heavy metal such as lead, nickel, zinc and cadmium no halide and commonly used lead-acid batteries compared to static operation, the total emissions during the life cycle only 7-25% of the lead-acid battery vanadium electrolyte can be recycled, unlimited life run at room temperature and pressure, no risk of fire and explosion. -
Advantages in new energy applications
In wind power applications, SOC is a very key parameter, SOC should be measured and controllable online at any time, rather than calculated offline cycle life is the short board of the battery, except for flow batteries. Vanadium batteries can be fast, frequent, high current charging and discharging, and deep charging and discharging do not damage the battery, the effective life of the battery is not significant, so durable charging and discharging response is rapid PCS can provide reactive power support for the fan and improve the wind farm low voltage traverse ability
Project Demonstration
China's northernmost all-vanadium flow battery energy storage project
- Technical advantages of the project
- Environmental advantages of the project
The first phase of the National Photovoltaic Energy Storage Platform (Daqing Base) is located in Daqing City, Heilongjiang Province, China. The 125KW/500KWh all-vanadium flow battery energy storage system is an important part of this project, which aims to independently, fully and comprehensively verify the technical performance of all-vanadium flow batteries. Provide more accurate technical information and direct project experience for the subsequent application of the owner unit in a larger scope and scale. The average annual temperature in this area is only 4.2 ° C, and the extreme temperature in winter can reach -39.2 ° C, which is a great challenge for the all-vanadium flow battery system arranged outdoors. In the rigorous testing process of nearly four months in winter, the energy storage system has withstood the test of extremely cold weather, and the performance indicators have met the relevant specifications and requirements, and have been highly recognized by the owners.
This is China's northernmost all-vanadium flow battery energy storage project, according to the characteristics of the extreme climate conditions of the project, targeted design of container-type cold-resistant outdoor layout products. It can still operate stably in such an extremely cold environment, which proves the feasibility of all-vanadium flow battery technology, and also shows the good stability and reliability of the energy storage product. This project also greatly expands the climate map in which all-vanadium flow battery technology can be used."
Megawatt energy storage system
- Design Scheme
Kilowatt-level and megawatt-level energy storage systems are composed of standard stacks, and the system power and capacity are independent of each other, which can be flexibly configured from kilowatt-level to megawatt-level according to customer needs, and can be easily and quickly expanded. The basic unit of the megawatt-level energy storage system is a 250kW standard module, which can flexibly configure the power module and energy storage time according to the actual needs of users, providing engineering design solutions that meet the needs of the site. All modules have passed operational tests and safety checks before installation, thus reducing engineering construction and commissioning time while avoiding project risks.
The picture shows a design of 3MWh all-vanadium flow battery energy storage system, including the stack structure, liquid storage tank and the layout of electronic equipment, control device and air conditioning system.
- Features
The patented megawatt-scale all-vanadium Flow REDOX battery Energy Storage System (VRB) helps power companies integrate renewable energy generation to improve the stability, power quality and economy of modern smart grids. The standard module (VRB-ESS®) of Pannon's all-vanadium Flow REDOX battery energy storage system is rated at 250 kW; A multi-megawatt system consists of these standard modules and electrolyte storage tanks. According to the actual needs of customers and projects, the system power and capacity can be flexibly configured. The product has the following advantages:
1. Frequent deep charge and discharge throughout the life cycle
2. The electrolyte can be recycled for a long time and has the characteristics of non-attenuation, which greatly reduces the cost expenditure for customers
3. High reliability, low operating and maintenance costs
4. Safety and environmental protection: closed operation at normal temperature and pressure, no risk of explosion and fire; Excellent environmental friendliness
5. Charging status can be monitored accurately and in real time
6. It can realize the transition between grid-connected power generation and isolated operation mode of microgrid
- Megawatt System Parameters
- 250kw System Parameters
- Kilowatt System Parameters
The kilowatt-grade all-vanadium flow battery energy storage system selected by HyjadeChain Supply Chain is an advanced flow battery that provides reliable, high-performance energy storage. Integrating all-vanadium flow battery energy storage systems into locally isolated communities, telecommunications base stations, and any energy management system powered by wind, solar, or fossil fuels can generate immediate economic benefits for customers.
Boundary Dimension
The total solution includes: the first 1300W optimizer matching 18X/210 components, the first full range of inverters to achieve reliable enterprise-class power supply, the first 200kWh industrial and commercial energy storage using intelligent series architecture, the first 720kW modular full liquid-cooled supercharge, and the first industrial and commercial intelligent cloud platform integrating AI and full link intelligence. The details are as follows:
1. Intelligent power generation: Intelligent component controller is not afraid of roof shadow occlusion, through component level optimization, improve the roof utilization rate up to 30%; Leading PID repair technology to increase power consumption by 2%; The intelligent cluster energy storage system increases the power consumption by 5% through packet level optimization.
2. Intelligent power consumption: full scene collaboration, the best comprehensive income of the business model, such as self-use superimposed peak valley arbitrage, can increase the income by 6.5%, peak valley arbitrage superimposed demand management, revenue increased by 18.9%; The 720kW modular supercharge is introduced for the first time, and the charging is integrated with industrial and commercial light storage solutions to optimize the charging experience.
3. Intelligent high reliability: unique inverter off-grid code to ensure stable operation of the power station; Unique energy storage PCS network construction capability, for different loads and different configurations, the electric energy always maintains grid-connected THDi < 1%, off-grid THDu < 1.5%; Unique one-button multi-machine black start, faster black start speed.
4. Intelligent simple operation and maintenance: Through automatic 3D modeling, APP one-click opening, AI light storage cooperation and other technologies, to ensure the whole life cycle of the power station very simple operation and maintenance experience.
5. Active safety: Ensure the safety and reliability of the system through the safety design of equipment-asset-person, such as the industry's first intelligent series breaking (SSLD-TECH), 15ms automatic shutdown to avoid the spread of DC faults; Enhanced Intelligent arc protection (AFCI), 0.5s fast shutdown, minimize safety hazards; The energy storage system has a unique roof burst design, directional release of energy, to ensure personal and asset safety.
