1. Overview of the application of battery energy storage technology
With the technological upgrading and transformation of the power system, more and more attention has been paid to the research on the renewable and recycling of power resources, which also responds to the policy requirements of energy conservation and environmental protection. Then, in the process of research on the renewable and recycling of power resources, the energy storage technology of power resources has been developed to a certain extent. Generally speaking, power resource storage mainly includes water storage energy storage, battery energy storage, superconducting energy storage and air energy storage. By comparison, it is found that water storage and battery storage are two relatively reliable and feasible electric energy storage technologies. However, water storage and energy storage technology is limited by the natural environment, geographical conditions and distribution of water resources, and is not suitable for every region. Therefore, battery energy storage technology stands out in the construction of micro-grids and becomes the preferred technical method for power resource storage.
The industrial energy storage batteries currently used in the microgrid system mainly include flow batteries, phosphoric acid batteries and iron-lithium batteries. With the continuous research of battery energy storage technology, the current lithium iron phosphate batteries and superior power storage And a high degree of operational stability, is widely used in micro-grid battery energy storage technology. The economics of the micro-grid battery energy storage technology analyzed and studied in this paper is mainly based on lithium iron phosphate batteries.
2. The application advantages of lithium iron phosphate battery energy storage technology
In the application process of micro-grid battery industrial energy storage technology, lithium iron phosphate battery has very superior application performance, which is also an important basis for analyzing and evaluating the economics of micro-grid battery energy storage technology. The advantages of lithium iron phosphate batteries are mainly reflected in the following aspects:
First, the normal operating temperature range of lithium iron phosphate battery is relatively wide, and it can maintain normal operation at minus 25 ° C ~ 60 ° C, and during use, with the chemical changes of the battery electrolyte, the temperature value it can carry is also It can be further expanded. After experimental research, the lowest temperature that lithium iron phosphate batteries can withstand can reach minus 40°C, and the highest temperature can reach 70°C. The superior temperature performance of lithium iron phosphate battery makes it have a very long service life and can achieve the greatest cost-effectiveness.
Second, the lithium iron phosphate battery also has the performance of fast charging and discharging, and at the same time, it can realize 100% resource conversion during the charging and discharging process, which greatly reduces energy loss and realizes the unity of energy saving and economic benefits.
Third, lithium iron phosphate batteries can save five times more power resources than ordinary lead-acid batteries, so in the process of applying micro-grid battery energy storage technology, a smaller amount of single batteries can be used to achieve The best energy storage effect, thereby reducing the cost of technical applications.