Power battery pack thermal management system based on immersed boiling heat transfer

Abstract

The invention discloses a power battery pack thermal management system based on immersed boiling heat transfer. A power battery pack is immersed in a working medium with a low boiling point, and when the power battery pack generates a large amount of heat, the working medium is heated to boil and vaporize so as to efficiently dissipate heat of the battery. Heat insulation pads are arranged among power batteries, heat transfer can be blocked when a certain power battery is in thermal runaway, thermal runaway of multiple batteries is prevented, the safety of the electric automobile is improved, the foam is arranged on the contact surfaces of the batteries and an aluminum barrel, and the safety problem caused by bulging and extrusion of the batteries in the working process is avoided. The optimal temperature range of the batteries is 25-40 DEG C, the batteries can always work in the optimal temperature range, namely, the temperature of the power batteries can be regulated and controlled in real time under different working conditions.

Description

technical field [0001] The invention belongs to the technical field of thermal management of power batteries, and in particular relates to a thermal management system and a method thereof for direct immersion boiling heat transfer of a liquid medium. Background technique [0002] With the continuous innovation and development of power battery technology, especially the sharp drop in the cost of lithium-ion batteries, the development of the global electric vehicle industry has accelerated significantly. [0003] The power increase of electric vehicles requires large-capacity batteries and high-current discharge. During the working process of batteries, a large amount of heat such as electrochemical reaction heat, current Joule heat, and polarization heat will be generated, resulting in an increase in the temperature of the battery body. Battery heating is the main safety issue of lithium-ion batteries. Excessively high, too low or uneven temperature will affect the discharge ...

AI Technical Summary

Problems solved by technology

The biggest challenge of passive phase change material thermal management technology (PCM-BTMS) is to improve its thermal conductivity, and also consider the issue of latent heat recovery

Additionally, the integration of PCM systems necessarily increases space requirements, weight and cost

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