Temperature control system based on magnetic refrigeration technology, thermal management system and method for battery pack of electric vehicle

Abstract

The present disclosure provides a temperature control system based on magnetic refrigeration technology, and thermal management system and method for battery pack of electric vehicle. A heat dissipation box is connected with one side of an accommodation box through a pipeline and the other side is connected to form a loop. The heat dissipation box comprises a heat dissipation box body, a pluralityof heat dissipation fins are sequentially sleeved on the outer edge, and an electromagnetic body and a heating pipe are arranged on the inner surface. The accommodation box comprises an outer heat insulating box body and an inner microchannel partition box, the microchannel partition box includes a plurality of accommodation chambers separated by microchannel partitions, At that front and rear wall surface of the box body, a plurality of transverse and longitudinal connected pipelines are arrange inside the box body, A plurality of connecting branch pipes are arranged inside the microchannelseparator, The connecting branch pipe is communicated with the connecting pipe, and the temperature drop of the magnetic fluid coolant flowing out of the radiator box is caused by the magnetocaloric effect of the magnetic refrigerating material, so that the temperature of the magnetic fluid coolant entering the container box from the cold flow pipe can be effectively reduced, and the consistency of the internal temperature of the acted object can be maintained.

Description

technical field [0001] The present disclosure relates to a temperature control system based on magnetic refrigeration technology, a thermal management system and method for an electric vehicle battery pack. Background technique [0002] Driven by the energy crisis and environmental pollution problems, new energy technologies represented by power batteries have been developed rapidly and widely used. As the power source of many devices (such as electric vehicles), the battery pack is closely related to the overall performance of the device. [0003] However, in the actual application of the above-mentioned equipment using the battery pack as the power source, the battery cells are usually connected in series and parallel to form a battery pack to provide a suitable voltage and sufficient power. During the operation or charging of the equipment, the chemical reaction inside the battery and the internal resistance of the battery itself cause the battery cell to heat up and cau...

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Problems solved by technology

There are many literatures that have done research in this area, however, these cooling or thermal management technologies currently have certain shortcomings

[0005] For example, the Chinese invention patent CN102832425A, titled "A Thermal Management System and Thermal Management Method for Electric Vehicle Battery Pack", discloses that a cold plate is placed between two layers of batteries to absorb the heat generated by the battery. The liquid flow channel takes the heat out of the battery pack, and the high-temperature coolant flowing out of the battery pack is dissipated by the radiator and the fan; however, the heat dissipation power of the radiator and the fan is limited, and the cooling effect of the high-temperature coolant flowing through the radiator when the ambient temperature is high It is not ideal. At the same time, the coolant flow channel in the cold plate is too long, the temperature rise in the coolant flow is too high, and the cooling condition at the end of the pipe is poor, resulting in low temperature consistency inside the battery pack.

[0006] Chinese utility model patent CN206546865U, titled "Battery thermal management system based on phase change material and air-coupled cooling" discloses that a composite phase change plate is arranged between the battery cell and the fin cooling plate, and the composite phase change plate absorbs the battery The heat generated by the monomer is transferred to the fins of the cooling plate, and the heat is taken away by air flowing through the fins; however, the finned cooling plate greatly increases the volume of the battery pack and reduces the grouping rate of the battery pack. The heat transfer efficiency of air cooling is low, and the heat dissipation conditions of the terminal fins are poor, resulting in poor temperature consistency inside the battery pack. In addition, the thermal management system does not have low-temperature heating capabilities

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