Thermal management system and control method for coolant flow to controllable battery pack

Abstract

The invention discloses a heat management system and a control method for cooling liquid flowing to a controllable battery pack, comprising a battery pack shell and a liquid cooling plate arranged in the battery pack shell, and a battery pack water inlet and a battery pack water inlet are arranged on the battery pack shell The water outlet of the battery pack, the liquid cooling plate includes a first liquid cooling plate tube interface and a second liquid cooling plate tube interface located on the left and right sides thereof, and a The coolant flow channel, the battery pack housing is also provided with a steering device that communicates with the first liquid-cooled plate tube interface and the second liquid-cooled plate tube interface through pipelines, and can change the flow direction of the coolant in the coolant flow channel. The steering device It includes a device water inlet connected to the battery pack water inlet through pipelines and a device water outlet connected to the battery pack water outlet through pipelines. The present invention eliminates the fixedness of temperature distribution that has existed for a long time, reduces the difference in heat dissipation of battery pack monomers, and improves the service life and performance of the power battery.

Description

technical field [0001] The invention relates to the technical field of battery structure of new energy vehicles, in particular to a thermal management system and control method for cooling liquid flowing to a controllable battery pack. Background technique [0002] Due to its compliance with the development trend and concept of energy saving, emission reduction and environmental protection, electric vehicles have become the focus of the development of various automobile companies in the world. As one of the key components of electric vehicles, the power battery's performance and life are greatly affected by temperature. At high temperature, on the one hand, the activity of the electrolyte is improved with the increase of temperature, and the internal resistance of the battery is reduced, which improves the performance of the battery to a certain extent; Batteries cause permanent damage and reduce battery life. The low temperature is opposite to the high temperature. At low...

AI Technical Summary

Problems solved by technology

However, the current liquid thermal management system generally has a relatively long flow channel, resulting in a relatively large temperature difference between the battery inlet and outlet, so that some cells in the battery pack are always in a high or low temperature environment. There is a large difference in heat dissipation, which affects the consistency of the monomer, which in turn affects the life of the power battery

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