关键词:

"> 储能电站, 锂离子电池, 电化学储能, 热管理系统, 浸没液冷, 经济性分析

Abstract:

[Objectives] The energy storage thermal management technology is iterating rapidly, and the cooling method used by mainstream companies has recently transitioned from air cooling to indirect liquid cooling, while submerged liquid cooling technology is moving from demonstration to application. However, the advantages of immersion liquid cooling in economy and other aspects have not been discussed in depth. Therefore, this paper compares three common thermal management systems and compares the differences of different thermal management systems by selecting indicators such as weight/volume group efficiency, temperature rise/temperature difference and operation and maintenance process. [Methods] Based on the investigation of the energy storage system, an economic model was established to consider the characteristics of the energy storage thermal management system, including the impact of battery capacity attenuation, and compared the cost, net present value, dynamic investment payback period, and internal rate of return. The parameter sensitivity of the index was analyzed. [Results] Under long-term operation, the internal rate of return of the system applying immersion liquid cooling in the same scale energy storage power station increased by 3.2% compared with the indirect liquid cooling system and 9.1% compared with the immersion liquid cooling system, and it can maintain a stable rate of return in the case of market fluctuations. [Conclusions] The yield of energy storage systems is sensitive to the difference between peak and valley electricity prices, and the yield of submerged liquid cooling is more stable in the event of market fluctuations. The results can provide reference for the construction and operation of energy storage power stations.

Key words:

text-align:justify, ">  , energy storage power station, lithium ion battery, electrochemical energy storage, thermal management system, immersion cooling, economic analysis