Repeated use of the battery: use electric vehicles for use in grid storage

　　Author ：Iflowpower – Portable Power Station Supplier

Inserted electric vehicles (PEVs) have great potential in reducing the consumption of fossil fuels and reducing greenhouse gas emissions, but due to their relatively high prices - most cost derived from battery systems - hindering its market large-scale popularization. Researchers in the US Department of Energy Renewable National Laboratory (NREL) play an important role in identifying the second use of batteries, and the second use of batteries can offset a part of the electric car costs. As the lithium ion battery as a PEVS energy storage device, it is usually the most expensive component in the electric vehicle.

There are still some environmental pollution problems in the process of processing used batteries. The use of secondary batteries can make the range of electrical energy applications, and repeated use of the battery can drive the widespread use of PEVs. At the same time, by supplementing the power demand during the peak of the grid, a cleaner, flexible grid can be established.

NREL confirmed that after the use of electric vehicles, the lithium-ion battery can still maintain an initial capacity of 70%, which allows us to use its electrode material again. "Every request for the Department of Energy, we will carefully evaluate the strategic advantages, feasibility, and potential obstructions of B2U (battery secondary use) strategy. "The Manager of the NREL Energy Storage Group said," We not only confirm that this method is used for the secondary use of the battery, but also discovered that the method can bring a lot of interests for car manufacturers and owners.

"The life of the battery can be extended to 25 years of NREL supporting laboratory and on-site test intensive technical economic analysis, better understanding battery performance recession, continuous development of energy storage world, and true potential costs and benefits of reuse. This study shows that due to the relatively low cost and the battery is rich, practical energy storage may be most promising to apply. "Our analysis shows that B2U will not significantly reduce the price of PEVs, but can reduce the battery of the owner to update to life, and deal with the cost of waste batteries, at least 1000 $".

Pesaran said, "If industrialization, the possibility of integrating B2U and grid will be larger". After 15 years of electric vehicles expires, the battery can also carry out secondary use. NREL's research shows that the battery can maintain 70% of the initial capacity after 15 years, and it can be used for 10 years, which means that the battery life can be delayed to 25 years.

This 25 years of valuation is based on normal use of electric vehicles in the first 15 years, and then use the NREL's battery model, that is, the depth discharge is 50% per day. B2U's use of potential NREL analysis showed that the easy-to-use PEV secondary usage model can use lithium-ion batteries with relatively low prices while preventing huge waste of mobile phone waste batteries across the country. Although the secondary use of batteries have a high-order or greater order, there are many high-value markets, and the battery is reused by utilities, and large-scale demand will utilize most of the waste secondary batteries, while recovering or from waste streams.

Substitution to transfer them. PEV's battery is very expensive, most of the car is driven by oil, natural gas and other energy. The electric vehicle battery based on the second use can replenish electric energy at the peak of electricity.

When the electric energy is stored, the power supply is added, and the stability of the grid is added. The battery used in the second use will become more and more valuable with future solar energy, wind energy, and wind energy. In order to test their analysis results, NREL and the US Department of Energy have established a secondary battery electric vehicle energy storage system in the world's first integrated variety of batteries in California University San Diego.

The system is compliant by the US Energy Stability Center (CENTERFORSUSTAINABLEENERGY), in accordance with the requirements of the power supply management regulation, in real time, the solar power response and the maximum load of the maximum load, or the frequency of the power grid substation is reduced to stabilize the grid. The test proves that the B2U system has successfully reached a scheduled goal. Additional tests conducted in the NREL laboratory have shown that the decay of the B2U system is very slow, that is, the system has a long service life.

"We use the Mikeferry of the energy stability center of the energy stability center from two different manufacturers to design, performance, control system, voltage, and capacity. "Even if there are many different, our system is very good in the past 2013". What does it mean for car manufacturers, workers and owners? It is estimated that the key material of the PEV battery will be applied after 2030, which also gives the automakers and operators 15 years to develop new methods to ensure reliability, compatibility, cost, and market recognition.

The NREL team found that the economic profit of B2U is very low, but it also wants to accurately attenuate test data during use. Techniques for testing batteries in the work make it possible to track the state in the entire life process, that is, it can accurately determine whether the battery has the value of secondary use. The low-cost megawatt-level power system based on the reuse of the battery will definitely be a gentle peak power grid.

"If the proposal is adopted, B2U may become an important part of the automotive and power industry, and it is important to reduce greenhouse gas emissions and fossil fuel consumption. "Pesaran said. .