A power battery thermal management system based on helical microchannel liquid cooling tubes

Abstract

The invention provides a thermal management system for a power battery based on a spiral microchannel liquid-cooled tube, including a cooling system, a control system and a cooling device; the cooling device includes several electric cores, temperature sensors and a base; A number of electric cores, any one of the electric cores is wound with a spiral liquid-cooled tube, the base is provided with an upper micro-channel liquid-cooled tube and a lower micro-channel liquid-cooled tube, and the upper micro-channel liquid-cooled tube is connected with at least one The inlet of the spiral liquid-cooled tube is connected; the lower micro-channel liquid-cooled tube is connected to the outlet of at least one spiral-type liquid-cooled tube; the cooling system forms a closed-loop connection with the upper micro-channel liquid-cooled tube and the lower micro-channel liquid-cooled tube, The control system is used to judge whether to control the cooling system. The invention can ensure that the power battery pack always works in the optimal temperature range during operation, reduces the battery performance attenuation speed and eliminates related potential safety risks, so that the battery system can achieve the best performance and service life.

Description

technical field [0001] The invention relates to the technical field of a power battery thermal management system for an electric vehicle, in particular to a power battery thermal management system based on a spiral microchannel liquid-cooled tube. Background technique [0002] In recent years, safety issues such as overheating, combustion, and explosion have been the focus of power battery research. The generation and rapid accumulation of heat will inevitably cause the internal temperature of the battery to rise, especially when it is used in a high temperature environment or when it is charged and discharged with a large current, it may cause A violent chemical reaction occurs inside the battery, generating a large amount of heat. If the heat accumulates quickly inside the battery without enough time to dissipate, the battery may leak, outgas, smoke, etc. In severe cases, the battery may burn violently or even explode. For traditional lead-acid batteries, or Ni-MH and Li-i...

AI Technical Summary

Problems solved by technology

However, the current liquid cooling system has a relatively simple pipeline layout, poor heat dissipation, and cannot dissipate heat for a single battery cell, resulting in uneven temperature distribution between the battery cells, which limits the performance and service life of the battery.

[0004] The Chinese patent discloses a liquid-cooled module for lithium-ion power batteries. Its disadvantages are that the structure of the designed liquid-cooled module is too complicated, and it cannot perform effective and targeted heat dissipation according to the real-time temperature change of a single battery cell. Overall temperature uniformity is low

[0005] The Chinese patent discloses a liquid cold plate for power batteries. Its disadvantage is that it only considers the heat dissipation at the bottom of the battery cell, resulting in an excessive temperature difference between the top and bottom of the battery cell, and it cannot be strengthened according to the temperature change of the battery pack. Heat dissipation, heat dissipation effect is poor

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