Where does energy storage go? Five new energy storage technologies at a glance

?

Large-scale energy storage track is hot, new energy storage technology is changing with each passing day, sodium ion battery, flow battery, gravity energy storage, flywheel energy storage, compressed air energy storage industrialization continues to accelerate, the landing of demonstration projects in an endless stream of news.

Sodium ion cell

Sodium ion batteries have obvious advantages. First of all, raw materials are abundant. The abundance of sodium in the crust is about 435 times that of lithium. Secondly, it can apply lithium manufacturing process and industrial chain, with the ability to quickly realize industrialization; Third, excellent performance, high safety, fast charging performance, low temperature performance is good.

However, the shortcomings of sodium-ion batteries are also obvious, such as large volume, low energy density and longer cycle life than lithium-ion batteries.

To sum up, in the field of large-scale energy storage, which does not have high requirements for product energy density, is extremely sensitive to product materials and production costs, and does not have large requirements for product space volume, sodium-ion batteries have great potential.

At present, the progress of sodium industrialization of Chinese enterprises is very bright.

Zhongke Haina is in the forefront of the world in the field of sodium electric energy storage technology. Ningde Times and other lithium electric leading into the bureau of sodium electric energy storage to accelerate the industrialization process; Huayang has realized the operation of the world's first production line of sodium ion cells.

Flow batteries

Flow batteries can be classified into vanadium flow batteries, zinc bromine flow batteries, iron chromium flow batteries, etc., with vanadium and iron chromium as the main commercial streams.

Due to the structural design of the flow battery, when working, the positive and negative electrolytes are separated, their respective cycles, do not interfere with each other, with long cycle life, wide application range, high capacity, high safety and the electrolyte can be reused and other advantages.

The disadvantage is that the operating temperature range is narrow and the energy density is low. Take the whole vanadium flow battery for example, its energy density is 15~30Wh/L, about one tenth or even one 26th of the lithium-ion battery.

In the field of long-term energy storage, iron-chromium liquid flow battery has obvious advantages, low toxicity and corrosion, cycle life of up to tens of thousands of times, equivalent to the service time of more than 20 years, and the comprehensive cost is close to pumped storage, which has great potential in the field of long-term energy storage.

According to the incomplete statistics of Veke.com energy storage, at present, the completed liquid flow battery energy storage projects include 200MW/800MWh Dalian National Demonstration Project of liquid flow Battery Energy storage Peak Balancing Power Station, 10MW/40MWh Guodian Taushan grid source friendly wind Farm energy storage project and 1MW/2MWh Huadian Tengzhou New Energy Thermoelectric Co., LTD project.

Gravitational energy storage

Gravity energy storage belongs to mechanical energy storage. The working principle is to use the height difference to lift the energy storage medium to realize the mutual conversion of gravity potential energy and electric energy.

The advantages of gravity energy storage are mainly concentrated in three aspects. First, the initial input cost is low, only about 3 yuan /Wh, lower than pumped storage energy; Second, high security, no strict requirements on the environment, can be built in remote areas; Third, long life, the average life span can reach 30-35 years.

The disadvantages are large footprint and low energy density. It is suitable for small islands and isolated areas with high power costs, small energy storage needs, and periodic energy storage needs.

The pioneer of gravity energy storage in China is China Tiananda. On September 8, 2022, it announced that it has reached strategic cooperation with Tongliao Municipal People's Government and China Investment Association to build Tongliao Fengguang hydrogen and ammonia storage integrated zero-carbon Industrial Park and zero-carbon industrial equipment manufacturing center including gravity energy storage project.

Compressed air energy storage

Compressed air energy storage refers to the use of electric energy at the peak and trough of the power grid load to compress and store the air, and then release the compressed air at the peak of the power grid load to drive the turbine to generate electricity.

According to the different working medium, storage medium and heat source, compressed air energy storage can be divided into traditional compressed air energy storage system, compressed air energy storage system with heat storage device and liquid gas compression energy storage system.

The advantage of compressed air is the flexibility of site selection. Power stations can be built in caves, salt caves, abandoned mines, expired oil and gas Wells and other places, which can greatly reduce the cost of raw materials and land.

Compressed air energy storage technology is relatively mature, and several demonstration projects have been implemented in China.

On September 23, 2021, the 10MW salt-cavern compressed air energy storage peak-regulating power station was officially put into operation in Feicheng Economic Development Zone, Shandong Province.

On May 26, 2022, Jintan Salt Cave compressed air Energy Storage National experimental demonstration Project, the world's first non-supplementary combustion compressed air energy storage power station, was officially put into operation in Jintan District, Changzhou City, Jiangsu Province.

The flywheel energy storage

The core components of flywheel energy storage are the flywheel body and the electric/generator reciprocal bidirectional motor.

The working principle of flywheel energy storage is as follows: the reciprocal bidirectional motor drives the flywheel to rotate at a high speed and convert electrical energy into mechanical kinetic energy for storage; When electric energy is needed, the rotating flywheel is used to drive the motor to generate electricity and output electric energy, so as to realize the mutual conversion and storage of electric energy and mechanical kinetic energy.

Flywheel energy storage has the advantages of long life, easy installation, easy maintenance, large energy storage, high energy storage density and not limited by the number of charges.

At the same time, it also has great limitations, comparatively speaking, its energy density is low, low safety, rotor, bearing design to be improved.

Considering its advantages and disadvantages, flywheel energy storage can be widely used in uninterruptible power supply, emergency power supply, battery-free maglev flywheel energy storage UPS, electric vehicle batteries, power grid peak regulation and frequency control and other fields.

At present, there have been specific cases of small-scale prototype flywheel energy storage being put into use. For example, on April 11, 2022, two 1MW flywheel energy storage devices were successfully put into use at Wanniquanlu Station of Qingdao Metro Line 3.

However, in the aspect of large-scale energy storage, restricted by the status quo of technology research, flywheel energy storage still needs further research and development before it can be successfully commercialized.

future

In the future, the world's energy storage market is huge, and a single energy storage technology is doomed to be unable to occupy all of them.

According to the cost, performance, applicable conditions and other factors of each energy storage technology, different energy storage technologies will have their own development in the field of energy storage segmentation.

The layout of sodium ion battery is flexible, which can be used in industrial and commercial energy storage. Flow batteries may shine in the field of long-term storage; Gravity energy storage will be cost-effective in remote mountainous areas and islands; Compressed air energy storage can greatly save initial cost in abandoned oil fields and mines. Flywheel energy storage has a chance to take a bite out of power storage.

?

Accumulations of guangdong new energy co., LTD. Is a vertically integrated energy storage electric lithium battery research and development production, the BMS research and development, system integration, sales for the integration of new energy storage enterprise, its predecessor in UPS power supply industry with 25 years experience in research and development production, actively respond to national call to achieve carbon up to the peak, the double carbon carbon neutral strategic target, the company actively develop clean energy transformation, In the energy storage sector has developed and produced portable outdoor power supply, home energy storage, industrial and commercial energy storage. Guided by market demand, we provide the leading integrated solutions for lithium battery energy storage system.

Disclaimer:

1. Some articles and pictures come from the Internet;

2. Due to editing needs, there is no necessary connection between the text and the picture. It is only for readers' reference and does not represent the views of the platform, nor does it constitute investment advice or decision-making advice, nor does it provide material for any user transaction.

3. We have reproduced all the articles, pictures, audio video file information such as copyright belongs to the copyright shall belong to the original people, because of the original articles and pictures, etc can't contact and copyright, such as the author or editor that work should not be access to the Internet for everyone to browse, or should not be used free of charge, or involve copyright issues, please inform us in time, to take appropriate measures to quickly Avoid causing unnecessary economic losses or copyright disputes to both parties;

4. If this website infringes the intellectual property rights of media or individuals unintentionally, please contact us within 30 days after the publication of the article. We will delete the content as soon as possible, thank you.