Lithium battery is gradually to the dispersing and scale of energy storage and energy storage field

Source: China's proceedings update time: 2018-08-20 13:02:01

 

     On July 18, China's first 100000 kilowatt battery energy storage power station in the grid was put into operation formally, zhenjiang city, jiangsu province in large-scale battery energy storage power station opened a new stage of commercial operation.     

     And according to the latest MIT technology review magazine reported that despite the lithium ion battery costs fell sharply in the past ten years, but still too high, not enough to cover a longer use time, make renewable energy become the main energy of 

power grid.     

     "Although the lithium battery storage power station's cost is more than double that of lead-acid battery, but this is not a 

reason for abandoning the lithium battery." Jing-zhong wang, vice director of China battery industry association told reporters, 

the proceedings of the People's Republic of China. A variety of different applications of energy storage power and energy storage 

capacity requirements are different, all kinds of energy storage technology has its appropriate application fields.     

     The national electric power energy storage standardization technical committee secretary general to a well-off, agreed that 

China's new lithium ion battery has meet the requirements of business operation by high temperature resistant, no explosion, such 

as security requirements, all of this to open the large-scale battery energy storage power station construction, provides the 

technical support. And expected future lithium battery costs will be reduced to 0.25 yuan per degree.

     

Was replacement of "weak"

    

     Renewable energy technology development has made great progress, make the solar and wind power on price can compete with fossil fuels, but always because of the power of intermittent instability. Detachment from the United States at the Massachusetts 

institute of technology of new energy storage company Form energy CEO ted ˙ Willie said: "if you want to use renewable energy to power the world, we need to find a way to overcome this variability."     

     This is about to use battery storing excess energy, to make up for the change of the supply. According to researchers at the Massachusetts institute of technology and the argonne national laboratory in a 2016 analysis of today's best battery storage 

technology applied in micro miniaturization effect, "peak" alternative smaller power plants, these plants often provide improper operation with natural gas as fuel - only when high the price is right and demand rapid fire.     

     But, in addition to instead of small power plants "peak", the battery has met the real bottleneck. In 2016, researchers found that when a large number of battery storage is added to the power grid, a sharp drop in the returns. Their conclusion is that the 

battery storage and coupling, renewable power plant is a large, flexible coal or natural gas combined cycle power plant of "weak" alternatives, lithium-ion technology not only for traditional energy sources are too expensive, and limited battery life means that 

it is not suitable for long time to fill the blank of the wind and solar power.

     To this, jing-zhong wang did not agree with, "the life of the battery energy storage power station depends on its cycles, lithium iron phosphate battery cycles in more than 2000 times, with nearly 10 years. Moreover, compared with nickel metal hydride 

batteries, nickel-cadmium batteries, lithium battery self-discharge quantity is small, can be stored for a long time power ".

     In addition to the cycles, external conditions can affect the service life of lithium-ion batteries. Minus 20 ℃ environment, basic cannot play a role, lithium battery high humidity effect on the life and safety of the battery.

  jing-zhong wang said: "as long as the environment right, the service life of the lithium battery energy storage power station, and security is guaranteed."

     He added, from a cost point of view, the lithium battery energy storage system to invest is a lot higher than lead-acid batteries, but lithium battery with high energy density, small volume and high rated voltage, and lithium ion battery technology 

progress quickly, good industrial foundation, its scale is gradually to the distributed energy storage and energy storage areas.

Demonstration project to explore business model

     Since June of this year, henan, jiangsu, fujian, guangdong, qinghai, Inner Mongolia has as much power grid energy storage such as bidding, construction, grid, such as news, show that the energy storage market is growing. In early June, henan power grid of 

100 mw battery energy storage demonstration project bidding for the first time, lishen battery, SMW power lithium battery companies such as bidding; In mid-july, force energy to participate in the construction of zhenjiang in energy storage power station project 

in eastern beishan text is a research and energy storage power station project, the beishan energy storage power station was its 

power as a demonstration project in jiangsu.

      In fact, the project is just a part of this year "energy storage heat". In the new project, energy storage systems are 

supporting for lithium-ion batteries, lithium-ion battery energy storage power station of many application demonstration, is 

constantly explore energy storage application in centralized renewable energy grid and grid side business model.

      There are economic value of the project is small the application of user side. Zhongguancun energy storage industry technology

 alliance to reporters, according to provide business users to install energy storage system, the peak valley price difference is 

bigger, can save the electricity capacity; Verification rules in the capacity of electricity is more flexible, can also save 

electricity capacity for the user. Because in jiangsu province is the peak valley price difference is bigger, and can be flexible 

verification of electricity capacity of pilot areas, lithium-ion battery energy storage user side projects be born more, in the 

peak valley price under the premise of not less than 0.75 yuan/KWH, static of this kind of project investment capital is recovered 

in 7 ~ 9 years.

      "Relative to income, the cost of lithium-ion battery energy storage power station is relatively high." Energy storage branch 

of Chinese society for the study of energy, a senior research manager YueFen told reporters, the proceedings of the People's 

Republic of China "in jiangsu province and in assessing whether the grid side certain incentives, energy storage project as its 

supporting the summer peak power demand compensation, but the specific whether such operation has not yet been published".

      

A number of energy storage technology is still in exploration

       Have data representation, by 2025, continued to dominate the li-ion battery, accounted for 80% of global electricity battery 

energy storage deployment.

       "Large-scale deployment of lithium ion battery energy storage system (also with difficulty), in addition to the cost of the 

bottleneck, the most important is the lack of market mechanism and incentive policy. No electricity market and incentive policy, 

energy storage can not get benefits from multiple channels, in the case of the high cost, long payback period of investment.

" YueFen said.      

      In fact, is not a single energy storage technology route. Is actively developing a variety of energy storage technology in 

China, in 2050 China's total installed capacity will reach 50 billion kilowatts (KW), according to the size of the adjustment of 

supply and demand balance, energy storage capacity will reach 400 million KW. Planning in our country in 2050 to build 160 million 

KW pumping energy storage capacity, far cannot satisfy the need of energy storage. "At present, with lithium ion battery and lead 

carbon is given priority to, supplemented by the compressed air energy storage, flywheel energy storage, super capacitor, flow 

battery, such as technical route, the different energy storage technology has been basically can meet the needs of different 

application scenarios." YueFen said.     

     "Flow and lithium batteries, and other battery energy storage technology are in the transformation of commercial exploration 

stage, is not the primary, the concept of laboratory." Beijing could be century technology co., LTD. President huang said, "all 

vanadium oxide also influent flow batteries have security, longevity, recycled, module and power module, electric capacity can be 

independent configuration, etc."      

     Cas dalian and dalian melt by compound energy storage technology development co., LTD., jointly, by vanadium flow batteries 

fully implemented a number of "light - store" "wind, light, store application demonstration project", to promote our country 

independent intellectual property rights flow battery technology into the primary stage of industrialization.

     Huang mian yan also said, however, is the bottleneck of the development of vanadium battery technology cost is higher, "this 

is the cost of a largely vanadium electrolyte. We combined with China's rich vanadium resources and has absolute advantage in the 

field of vanadium production enterprise work together, to launch the leasing mode and vanadium vanadium electrolyte electrolyte 

buybacks, trying to make the use of the whole system costs and electricity costs down "