What do you know about vanadium batteries?

Working principles of vanadium batteries

Vanadium battery (VR B) is a new type of clean energy storage device. It has been verified by applications in the United States, Japan, Australia and other countries. Compared with lead-acid batteries and nickel-metal hydride batteries in the current market, it has obvious technological advantages such as high power, long life, frequent current charging and discharging, and green pollution. It is mainly used in renewable energy grid power generation, urban grid energy storage, long-distance power supply, UPS system, and island applications.

According to public information, after a one-time charge of a vanadium battery, the endurance can reach 1,000 kilometers, and the charging time can only be 3 minutes to 5 minutes. The cost is 40 % of the current 24V lithium battery, and it is known as "perfect battery" in terms of life, charging time and cost.

Compared with other energy storage systems, the application of all-vanadium Redox liquid-flow batteries has the following advantages:

1, as the place where the reaction occurs, the electric reactor is separated from the storage tank for the electrolyte, which fundamentally overcomes the self-discharge phenomenon of the traditional battery. The power depends only on the size of the reactor, and the capacity depends only on the electrolyte reserves and concentrations. The design is very flexible; When the power is certain, to increase the energy storage capacity, it is only necessary to increase the volume of the electrolyte tank or increase the volume or concentration of the electrolyte, without changing the size of the reactor; The purpose of "instantaneous charging" can be achieved by replacing or adding a charged electrolyte. It can be used for the construction of kilowatt-to 100-megawatt storage power stations and is highly adaptable.

2, charge, discharge performance is good, can carry out high-power charging and discharge, can also allow flotation and deep discharge. For lead-acid batteries, the larger the discharge current, the shorter the battery life; The deeper the discharge, the shorter the battery life. Even if the discharge depth of the vanadium battery reaches 100 %, it will not affect the battery. Moreover, vanadium batteries are not easily short-circuited, which avoids safety problems such as explosions caused by short circuits.

Basic working principle of vanadium battery

3, can be charged and discharged a large number of times, theoretically life is numerous times. The charge-discharge time ratio is 1:1, while the lead-acid battery is 4:1. Moreover, vanadium battery charge and discharge switch response speed, less than 20 milliseconds, is very conducive to balanced power supply.

4, high energy efficiency, DC to DC energy efficiency can reach more than 80 %, and lead acid batteries only about 60 %. The status of the cells in vanadium batteries is basically the same, and the maintenance is simple and convenient.

5, the location of the site is large, the area is small, the system can be automatically closed, no acid fog, no acid corrosion. The electrolyte can be reused, no discharge, simple maintenance and low operating cost. It is a green energy storage technology. Therefore, vanadium batteries are ideal alternatives to lead-acid batteries for renewable energy power generation.

2, can vanadium batteries lead the new energy revolution

Vanadium Battery (VR B) is the world's largest, most technologically advanced, and closest to industrial efficient reversible fuel cell with large power, large capacity, high efficiency, low cost, long life, green and environmental protection. A series of unique advantages, It has extremely good application prospects in such broad fields as wind power generation, photovoltaic power generation, grid peak adjustment, distribution power stations, military storage power, transportation municipal administration, communication base stations, and UPS power supply. In Japan, Canada, the United States, Australia, Western Europe and other countries and regions have begun to replace small capacity, short life, pollution of lead-acid batteries.

Wind power generation

At present, wind turbines need to be equipped with lead-acid batteries with a power equivalent to about 1 % of their power for fan protection in emergency situations. In addition, each fan needs to be equipped with a reserve battery with a power equivalent to about 4 % of its power. As the power grid has become a bottleneck for the development of wind power, with the explosive development of wind power, the contradiction between wind power and the power grid will become more and more prominent. In order to reduce the impact on the power grid, the utilization rate of wind power field power will be greatly increased while earning huge amounts of power grids. Peak and valley difference, The wind farm will need to be equipped with a dynamic energy storage battery with a power equivalent to 10 to 50 % of its power. For fan off-grid power generation, a larger proportion of dynamic energy storage batteries is required.

Wind turbine manufacturers have been looking for better products to replace lead-acid batteries because of the serious shortcomings of the lead-acid batteries currently used by fans, such as small capacity, short life span, poor stability, time-consuming maintenance, and heavy pollution. We believe that vanadium batteries with many outstanding advantages can completely replace the existing lead-acid batteries, and then build a dynamic energy storage system for wind farms, greatly increase the efficiency and efficiency of wind farms, and promote the better and faster development of wind power industries.

Photovoltaics

According to authoritative statistics, the annual growth rate of global photovoltaic components in recent years has been as high as 30 <UNK>, and the photovoltaic industry has become one of the fastest growing emerging industries in the world. In particular, in 2008, the total installed capacity of global photovoltaic power generation reached 3jiwa.

As the name implies, photovoltaic power needs sunlight. Once it reaches the night and rainy days, it can not generate electricity. Therefore, it needs a battery to store power for it, because lead acid batteries have very limited power, capacity, and life. It is believed that vanadium cells with many outstanding advantages will be the first choice for photovoltaic energy storage cells.

Power grid peak

The main means of peak adjustment of power grid has been pumping storage power station. In the past 20 to 30 years, the world's developed countries have developed more and more pumping storage power stations. Japan is the world's fastest growing and most equipped power station, followed by the United States, Italy, Germany, France, Spain, etc.. The installed capacity of Japan and the United States has exceeded 20 million kilowatts.

Because pumping storage power stations need to build up and down two reservoirs, they are limited by geographical conditions, and they are not easy to build in plain areas, and they occupy large areas and have high maintenance costs. The vanadium battery storage power station is not limited by geographical conditions, and it is freely located, occupies less land, and has low maintenance costs. It can be expected that with the development of vanadium battery technology, vanadium battery storage power station will gradually replace pumping storage power station and play an important role in the peak adjustment of the power grid.

Traffic Municipality

With the rapid urbanization of the world and the continuous increase of car ownership, automobile exhaust pollution has become the number one pollution source of urban air pollution. It has become a consensus among people to develop energy-saving and environmentally friendly electric vehicles instead of traditional fuel cars. With the rapid development of vanadium battery technology, it can be expected that Vanadium batteries with many outstanding advantages will play an important role in electric vehicles(especially urban bus buses), electric locomotives, electric bicycles, electric ships, traffic signals, and complementary street lights.

Communications base station

Communications base stations and communication rooms require batteries as backup power sources, and usually can not be less than 10 hours. Safety, stability, reliability and service life are the most important for communications operators. In this field, vanadium batteries have inborn advantages that lead acid batteries can not match.

UPS power supply

CCID Consulting research shows that the UPS market has continued to grow in 2007. The main reason is that the decentralization of UPS user demand brought about by the continued rapid development of the Chinese economy has caused more industries and more companies to generate continuous demand for UPS. In the next few years, the development direction of UPS products will be higher availability, security, and integration, intelligence, and humanization of functions.

At present, the Chinese UPS market strongly requires high-power, safe, stable and reliable batteries. Vanadium batteries in this field have absolute advantages over lead-acid batteries in terms of power, safety, and service life.

Distribution power station

The quality, efficiency, environmental protection and safety and reliability of energy and power supply are more and more demanding in today's society. Because of its own defects, large power grids can no longer meet this demand. With the rise of distributed power stations, large-scale central power stations will gradually decline. It is believed that vanadium batteries will first play an important role in distributed power stations in hospitals, command and control centers, data processing and communication centers, commercial buildings, entertainment centers, key government departments, pharmaceutical and chemical materials industries, and precision manufacturing industries.

special storage

Vanadium batteries can also play an important role in military storage of military departments such as military bases and command centers.

The page contains the contents of the machine translation.