The Important Role of Lithium Battery in Energy Storage of Power Grid

The super-large lithium ion group was still relatively cold 10 years ago. Now, however, there are countless applications for lithium-ion batteries. There were no such batteries before on the ship, but now we can see 1 to 5 MWh of batteries. Unmanned navigation vehicles, mining trucks and buses use batteries of up to 350 kWh, while truly large batteries are those used on ground fixtures. The increasing market share of lithium-ion batteries in developing countries has a multiplier effect.

Grid function

Take the relatively new market for large-sized surface lithium ion batteries(such as for peak adjustment in the grid) as an example. Weight is not a priority factor and the volume has a certain relationship, but battery life, cost life ratio, performance, and reliability are the most important.

For example, Toshiba's titanium dioxide anode battery on the market has a good cycle life. Applications include balancing grid power supply and providing emergency power supply in the event of power outages.

The United Kingdom will test its first battery system to adjust the frequency of the grid. National Grid, the British energy utility company, and Renewell Energy Systems, a British company, announced in June 2016 that they would cooperate in the development of the system.

The 20-megawatt battery storage system can power 1,000 pure electric vehicles. Previously, RES had installed six similar battery storage systems in the United States.

Discussion on the Important Role of Lithium-ion Battery in energy storage of Power Grid

It will provide a dynamic frequency response service that can detect frequency deviations within 1 second regardless of Gaochu or below 50Hz. This work is the test platform for the 200 MW Frequency Response service plan planned by the National Grid of the United Kingdom in the United Kingdom.

Competing technologies

In selecting energy storage systems, RES is technically unknown. But the company said all of its 74 MW projects currently in operation use lithium-ion batteries, so it is now very likely that the contract will use lithium-ion batteries.

The UK is moving towards hybrid power generation, increasing the share of cheap renewable energy, and this service and future frequency enhancement response services programs will support the grid in this situation.

Competition for large lithium-ion batteries in grid applications comes from vanadiumflow batteries. In addition, the Central Institute of Electrochemistry(CECRI) of India will announce in 2019 a zinc bromide Redox liquid-flow battery(zincbromidedoxflow) for grid storage of renewable energy.

In a small way, this technology can be used to quickly charge a bus that passes through the station using the station's signal frame, whether the bus is powered by a lithium-ion battery with Super capacitor protection or just a Super container that can charge quickly and frequently. In either case, ground equipment tends to use lithium-ion batteries interspersed with super capacitors.

The dominance of lithium-ion batteries has not wavered.

Even in the face of many challenges, the integration of large lithium-ion batteries with the grid, and even its application in the micro-grid is indispensable.

It has even been considered that there is a problem with the price and reliability of the grid and that the establishment of microgrids is localized in cities that are reluctant to use diesel generators because of pollution, noise and reliability problems.

The diesel power generation group has at least 600 GW of power generation worldwide, but some ecological agendas have called for its total elimination. Alternative equipment includes solar cells installed on buildings, roads and parking lots, coupled with wind turbines, autonomous kites capable of using wind energy, and quadcopter capable of generating electricity.

The above power generation technologies are intermittent and they all require energy storage. Although energy can be collected from multiple sources, allowing the various power generation parts of the interval to balance each other and reduce the amount of energy required to store, energy storage is still necessary because they do not always generate electricity when they need to use electricity.

Batteries can store electricity for a long time, and super capacitors can not do this. Lower tolerance for lead pollution could help expand lithium-ion batteries and eliminate the increasingly unpopular lead-acid batteries. For example, India is looking for ways to replace lead-acid batteries on railways and elsewhere.

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