The domestic energy storage market is "soaring", and downstream energy storage integrators and battery manufacturers have already begun to deploy energy storage liquid cooling technology, with new products emerging in an endless stream and new technologies constantly updated and iterated. With the involvement of more and more practical application projects, liquid-cooled energy storage systems are rapidly becoming the mainstream technology route in the market. According to public information statistics,Kehua Digital Energy, Sungrow, EVE Lithium Energy, Sermatec Energy, Nebula Times, Haibo Strong, Haichen Energy Storage, Zhongtian Technology, Shanghai Electric Guoxuan, Trina Energy Storage, Ashite, Shenghong Co., LtdDozens of manufacturers are following up on the trend of liquid cooling, and the new products released involve liquid cooling technology, covering various scenarios such as grid-level, industrial and commercial, and residential energy storage. Kehua Digital Energy Technology Center pointed out that nearly 80% of the current large-scale energy storage project bidding is liquid-cooled energy storage technology, why can liquid-cooled energy storage become the next hot track?First, let's take a look at liquid cooling. Liquid cooling refers to the method of cooling by using liquid contact with a heat source. According to the different contact heat exchange methods of coolant and server, it is divided into direct liquid cooling and indirect liquid cooling, of which indirect liquid cooling is mainly based on cold plate liquid cooling technology, and direct liquid cooling is mainly based on immersion liquid cooling technology. Cold plate liquid cooling (indirect liquid cooling):Cold plate liquid cooling is an indirect type of liquid cooling, that is, the heating element and the cooling medium are not in direct contact. Cold plate liquid cooling dissipates heat by direct contact with a cold plate filled with liquid, or heat is conducted to the cold plate by a thermally conductive component, and then the heat is removed by the liquid circulation inside the cold plate. Immersion liquid cooling (direct liquid cooling):Immersion liquid cooling refers to the direct immersion of heat-generating electronic components such as CPUs, motherboards, memory modules, and hard disks in insulating and chemically inert coolant (electronic fluorinated fluid), and the heat generated by the electronic components is carried away by the circulating coolant.
Secondly, Why choose liquid cooling?1. Low energy consumptionThe characteristics of liquid cooling technology, such as short heat dissipation path, high heat exchange efficiency and high refrigeration energy efficiency, contribute to the advantages of low energy consumption of liquid cooling technology. Short heat dissipation pathThe cryogenic liquid is directly supplied to the cell equipment by the CDU (cold energy distribution unit) to achieve precise heat dissipation, and the entire energy storage system will reduce a lot of self-consumption. High heat exchange efficiencyThe liquid cooling system realizes liquid-liquid heat exchange through the heat exchanger, which can concentrate and efficiently transfer the heat, make the heat exchange faster and have a better heat exchange effect. High energy efficiency in refrigerationThe liquid cooling technology can realize 40 55 high temperature liquid supply, equipped with high-efficiency inverter compressor, and the power consumption under the same cooling capacity is lower, which can further reduce the cost of electricity and save energy. In addition to the reduction of the energy consumption of the refrigeration system itself, the use of liquid cooling technology is conducive to further reducing the temperature of the battery cell, which brings higher reliability and lower energy consumption, and the energy consumption of the whole energy storage system is expected to be reduced by about 5%. 2. High heat dissipationThe commonly used media of liquid cooling system include deionized water, alcohol-based solution, fluorocarbon working fluid, mineral oil or silicone oil, etc., and the heat carrying capacity, thermal conductivity and enhanced convective heat transfer coefficient of these liquids are much greater than that of air; Therefore, liquid cooling has a higher heat dissipation capacity than air cooling for battery cells. At the same time, liquid cooling directly takes away most of the heat of the equipment through the circulating medium, and the overall air supply demand of veneer and whole cabinet is greatly reduced. In addition, in the energy storage power station with high battery energy density and large ambient temperature changes, the coolant and the battery are closely integrated, so that the temperature control between the batteries is relatively balanced. At the same time, the liquid cooling system is highly integrated with the battery pack, which can improve the temperature control efficiency of the cooling system.
Liquid-cooled energy storage market size**In the future, air cooling will be gradually replaced by liquid cooling, and the increase in the market share of liquid cooling will make the coolant ** continue to decline, and the liquid cooling technology will continue to improve, and then the cold plate liquid cooling will gradually change to immersion liquid cooling, and finally with the continuous improvement of heat production per unit time of energy storage projects, the requirements for heat exchange efficiency will continue to increase, and external thermal management with containers as the management goal may be the direction of further cost reduction and development. As the industry's requirements for the safety (battery thermal runaway), efficiency (battery temperature consistency) and life of battery energy storage become clearer, the liquid cooling system in the energy storage thermal management industry has gradually become a trend. The energy storage market has entered the fast lane of development, the development potential of the energy storage temperature control market is huge, the market penetration rate of liquid cooling technology will gradually increase, the market value of energy storage liquid cooling is expected to increase to tens of billions of yuan, and the energy storage temperature control system technology will lead the industry to bring new changes, open up a new development pattern for the new energy market, and bring a new blue ocean of growth! 
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