Thermal management system for prefabricated cabin of lithium ion battery energy storage system and control method thereof

Abstract

The invention is applicable to the technical field of heat exchange, and provides a thermal management system for a prefabricated cabin of a lithium ion battery energy storage system and a control method thereof, and the thermal management system comprises an underground water thermal management assembly, an intelligent fresh air assembly, a dehumidification assembly and a master control module. Circulating water is used for adjusting the temperature of the battery module, and the device has the advantages of high adjusting speed and good thermal insulation performance. Circulating water flowsthrough all the modules in the heat exchange plate in a parallel pipeline and cross flow battery module mode, the temperature consistency of all the battery modules in the prefabricated cabin can beimproved, and the service life of the system is prolonged. Circulating water flows in the heat exchange plate and the underground heat exchange pipeline in a closed mode, and potential pollution hazards to soil and underground water do not exist. According to the invention, the relative humidity in the prefabricated cabin can be controlled below 65% through automatic control, and when the ambienttemperature is lower than -30 DEG C, the heating film can be automatically started to assist in heating so as to increase the temperature in the prefabricated cabin, so that the battery module is in aproper humidity and temperature environment.

Description

technical field [0001] The invention belongs to the technical field of heat exchange, and in particular relates to a thermal management system for a prefabricated cabin of a lithium-ion battery energy storage system and a control method thereof. Background technique [0002] Lithium-ion battery is an energy storage medium with high specific energy and long cycle life. It has been widely used in portable electronic products, various electric vehicles, stationary backup power supply and electric energy storage and other fields. In recent years, the application of lithium-ion battery energy storage systems in the power field has developed rapidly, and the installed capacity has increased rapidly. [0003] The lithium-ion battery energy storage system is used to store energy for multiple battery modules in the prefabricated cabin. Heat will be generated during the energy storage process, and a heat exchange system is required to adjust the generated heat. Most of the current hea...

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Problems solved by technology

[0003] The lithium-ion battery energy storage system is used to store energy for multiple battery modules in the prefabricated cabin. Heat will be generated during the energy storage process, and a heat exchange system is required to adjust the generated heat. Most of the current heat exchange systems are traditional compressors. As for the thermal management device of the machine, because the traditional compressor adopts the air-cooling method, its heat transfer speed is slow and the heat transfer efficiency is low, it is difficult to achieve the consistency of the temperature of each module, which makes the performance of the monomer inconsistent, resulting in a short cycle life and a service life that cannot meet expectations The goal is to bring obstacles to the large-scale promotion and application of lithium-ion battery system products in the field of electric energy storage. How to further improve the design of the temperature control system of lithium-ion battery systems and improve the operation stability has not yet found an effective solution

[0004] For example, the patent "Prefabricated cabin temperature control system and secondary equipment prefabricated cabin using the system" with the application number 201510421380.0 uses a traditional compressor combined with an intelligent fresh air solution to reduce the energy consumption of the temperature control system, but it cannot effectively solve the problem of each battery module. Problems with Temperature Consistency

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