Lead carbon, lithium electricity, flow battery energy storage market will dominate in the future

As is known to all, energy storage is the smart grid and renewable energy access, distributed generation, the micro indispensable support network development, China's wind power, solar power and other new energy power generation technology has led the world, but in areas such as wind power, photovoltaic power generation, large capacity because of a lack of the support chemistry energy storage battery, the application of energy storage technology, such as constrained.

In recent years, in the policy of encouraging and production, from all walks of life, with the help of all kinds of battery energy storage technology constantly breakthroughs, formed a variety of battery energy storage technology, the common development of the gratifying situation, the energy storage technology is likely to be in power auxiliary service market of the future implementation of explosive growth.

Lead carbon batteries to achieve charging and discharging kWh cost 0.5 yuan/kWh

In existing electrochemical energy storage applications, the need is to improve the battery life and safety of breakthrough, reduce the cost. Carbon batteries at this point and lead walk in front of the other energy storage battery.

Lead carbon batteries from traditional capacitance type battery technology, the evolvement of the lead-acid batteries in the lead-acid battery cathode with activated carbon, significantly improve the life of the lead-acid battery and improve performance.

It is reported, the lowest cost of lead carbon battery energy storage, unit investment 1200 yuan/kWh and the degree of charging and discharging of 0.5 yuan/kWh electricity costs make it in many applications don't use any subsidy to profitability. To industrial and commercial users simply used for electricity price arbitrage is calculated, when the peak valley price difference is more than 0.8 yuan/kWh, not leveraged investment payback period can be as low as 5 years, if consider to save the capacity of the fee and participate in demand response the extra income gained by the electricity services such as auxiliary, the payback period will be shorter.

SMW power research and development of lead carbon battery products have been used in a number of domestic energy storage demonstration projects, some fushan island scenery wood energy storage power stations and desalination system, turpan, xinjiang new energy demonstration project, zhejiang deer island city micro grid 4 MWH new energy micro network storage, etc.

The Chinese academy of engineering academician Yang believes that with low cost, safety, industrialization of reactants, reliable and mature technology significant advantages, such as lead carbon battery is conforms to our country industry layout and manufacturing level of a storage battery.

It has advantage of pilot use of li-ion battery energy storage

Lithium ion batteries has a large energy density, low self-discharge, no memory effect, wide working temperature range, can fast charge and discharge, the advantages of long service life, no environmental pollution, known as "green batteries". Before lead carbon battery technology, lithium-ion battery energy storage is considered to be the most feasible energy storage product development technical route.

Lithium-ion batteries used in energy storage a long time not solve the problem, the cost is relatively high. The industry analysis, though, the lithium-ion battery energy storage costs are significantly higher than lead, but because of the advantages of high energy density and high rate charge and discharge capacity, in some applications, such as need high rate charge and discharge levels "seconds/minutes FM services", or more sensitive to equipment covers an area of commercial/residential energy storage market, still has irreplaceable advantages.

It is important to note that although the cost of lithium-ion battery energy storage is higher than lead, but it is a good way to save costs, that is receiving power battery arrangement in use.

Experts have predicted according to the China automotive technology research center, in our country power lithium battery being a rapid rise in future scrap, 2020 power lithium battery scrap amount will reach 120000 ~ 170000 tons. As motive power sources of electric vehicle with lithium-ion batteries, the capacity decay to 80% of the rated capacity, the range of electric vehicles will be significantly reduced, lost use value, but for energy storage system still has great use value. The vehicle power battery pilot use in energy storage, can greatly reduce the cost of the energy storage.

At present, the existing enterprise made active attempt in this respect. Shandong power environmental protection power supply co., LTD. "worn out lithium ion power battery recycling and comprehensive utilization "project, after the implementation of recycled every year 30 YiAn, power battery recycling the old battery capacity of about 2.4 billion Ah, can achieve energy make full use of formation energy storage station, 7200 megawatts. Vaillant Xiong Junwei explained, the general manager of our company, when the lithium battery capacity attenuation from 100% to 70% of capacity, the company can be in communication base station, industrial areas such as standby power continues to use in the form of energy storage batteries, back-up power at the same time also can be applied to the family.

All vanadium flow batteries energy storage technology by leaps and bounds

All vanadium flow batteries is a kind of based on metal element vanadium REDOX renewable fuel cells, fluid flow battery storage system can be realized by changing the electrolyte "recharging" moment. Shelf life infinite flow cell theory, long storage life, is of no self-discharge, 100% depth of discharge without damage to the battery. These characteristics make flow batteries become one of the preferred energy storage technology.

Because of all the characteristics of vanadium flow batteries, its application field is located in large-scale energy storage at the beginning, such as wind power and standby power supply. All vanadium flow and wind power, photovoltaic battery energy storage combined into off-grid or micro grid power generation systems, for island, off-grid remote areas, is the best combination of green energy.

After ten years of innovative research, Chinese academy of sciences dalian independent research and development by the compound 2 kw vanadium flow energy storage battery as a whole has successfully implemented more than 10000 times the charge/discharge cycle, energy efficiency of the battery module not seen obvious decay. Power technology co., LTD. Of Shanghai domestic non fluorine polymer successfully developed the vanadium battery with ion membrane, can replace imported special ionic membrane, in the domestic first 5 ~ 10 kw high vanadium flow energy storage battery (VRB) prototype, its energy storage efficiency reached 70%.

In all vanadium flow battery storage system applications, dalian and energy storage technology development co., LTD provides 200 kw / 800 KWH all vanadium flow energy storage battery systems, intelligent micro network has access to renewable energy, successful parallel operation; Guodian longyuan 5 mw / 10 mw energy storage battery systems engineering, and is by far the world's biggest vanadium flow battery energy storage system application demonstration project.

Although it technically has been relatively mature, but all vanadium flow battery storage costs are relatively high, away from the goal of energy storage battery market cost gap. But with the expansion of the energy storage industry, the resulting economies of scale will gradually lower flow cost of the battery.

Recently, the electric energy storage market big policy introduced, national energy bureau issued a "about promoting electric energy storage to participate in" three north "area of power auxiliary services compensation (market) notice of the pilot mechanism (hereinafter referred to as the" notice "), "notice" has been clear about the independent market main body position of electrochemical energy storage, energy storage of compensation, the method of payment and settle accounts of expense of power grid access and requirements, and the "notice" is suitable for other proposed to carry out the electrical energy storage in electric power auxiliary services pilot areas.

The personage inside course of study analysis, the policy to accelerate the domestic various types of commercial energy storage application market launch is of great significance. Is not hard, with the big policy of be born, battery energy storage technology constantly breakthroughs and commercial strong demonstration effect of the project, the outbreak of the battery energy storage market will be long.

The page contains the contents of the machine translation.