Water cooling system of thermal power plant energy storage system and working method

Abstract

The invention discloses a water cooling system of a thermal power plant energy storage system, and a method. According to the invention, cold water in an evaporator and hot water in a thermal control device are subjected to heat exchange through a heat exchanger, so that thermal runaway of an energy storage system can be effectively restrained, and the system safety is greatly improved; a steam pipeline can effectively utilize low-grade steam of a thermal power plant, so that the energy consumption is low, and the heat dissipation efficiency is high; through liquid cooling, heat dissipation is uniform, the temperature difference of a battery core can be reduced, and the service life of the battery core is prolonged; and the stable work of the energy storage system in an environment of -40 DEG C to 60 DEG C can be met.

Description

technical field [0001] The invention belongs to the field of energy storage, and in particular relates to a water cooling system and a working method of an energy storage system of a thermal power plant. Background technique [0002] Energy storage is one of the important means to solve the intermittent fluctuations of new energy wind power and photovoltaics and realize the function of peak shaving and flat valley. Due to its high energy density and high energy conversion efficiency, lithium batteries are currently the most widely used batteries in electrochemical energy storage projects. More and more lithium battery energy storage power stations are becoming an important part of power grid transmission, transformation and distribution. . [0003] The heat generated during the charging and discharging process of the lithium battery causes the temperature of the battery to rise, thereby affecting the working characteristics (such as the service life) of the battery. Heat d...

AI Technical Summary

Problems solved by technology

Air cooling has the advantages of easy maintenance and low cost, but the low thermal conductivity of air leads to unsatisfactory heat dissipation; liquid cooling medium has high heat transfer coefficient, large specific heat capacity, and fast cooling speed, but ethylene glycol and water are often used in liquid cooling technology. A certain ratio is used as the cooling medium of the cooling system. Once leakage and short circuit occur, accidents are prone to occur, and its safety cannot be guaranteed.

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