Indirect cooling system capable of uniformly cooling battery modules and battery pack including the same

Abstract

The invention provides a cooling system and a battery pack including the cooling system. The cooling system includes: a refrigerant inlet and a refrigerant outlet for introducing and discharging liquid refrigerant; and a plurality of refrigerant inlets or refrigerant outlets connected to the refrigerant inlet. Refrigerant pipe; one or more pipe connecting components used to connect two or more refrigerant pipes so that the refrigerant pipes communicate with each other and to change or divide the liquid refrigerant between the connected refrigerant pipes. flow; and a plurality of cooling plates including a hollow flow path in communication with at least one of the refrigerant pipes, each cooling plate having a battery module mounted on one surface thereof and allowing liquid refrigerant to flow through the hollow Path loop.

Description

Technical field [0001] This application claims the benefit of Korean Patent Application No. 10-2015-0172265 filed with the Korean Intellectual Property Office on December 4, 2015, the disclosure of which is incorporated herein by reference in its entirety. [0002] The present invention relates to an indirect cooling system capable of uniformly cooling a battery module and a battery pack including the indirect cooling system. Background technique [0003] In recent years, secondary batteries capable of charging and discharging have been widely used as energy sources for wireless mobile devices. In addition, as applications for electric vehicles (EV), hybrid electric vehicles (HEV), and plug-in hybrid electric vehicles (PHEV) that have been developed to solve problems caused by existing gasoline vehicles and diesel vehicles using fossil fuels, such as air pollution, As the power source for electric HEV), secondary batteries have attracted considerable attention. [0004] Sm...

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Problems solved by technology

[0009] However, in the above-mentioned battery pack cooling structure, a plurality of refrigerant flow passages should be provided to correspond to a plurality of battery cells or battery modules, and as a result, the overall size of the battery pack increases.

[0010] In addition, if the battery pack includes a larger number of battery cells, a larger number of components are added to the cooling structure, and as a result, the volume of the battery pack increases, the manufacturing process is complicated, and the cost incurred in designing the cooling structure is greatly reduced. Increase

[0011] Furthermore, a plurality of components are used to constitute a structure in which heat from a battery module or a battery cell is transferred to a refrigerant flow channel to thereby remove heat, and as a result, thermal conductivity decreases and thus cooling efficiency decreases

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