Separate power battery hybrid thermal management system

Abstract

The invention relates to the technical field of hybrid electric vehicles, in particular to a separate power battery thermal management system combining ultra-thin copper plates with a composite phasechange material. The system includes a power lithium battery pack, a foamy copper / paraffin composite phase change material and copper plates. The foamy copper / paraffin composite phase change materialcomprises polyurethane soft foamy copper and a phase change material filling the inside of the polyurethane soft foamy copper. One side of each copper plate is fixed on the largest side of each lithium battery body, and the other side of each copper plate is fixed among the foamy copper / paraffin compound phase change material. The system further includes radiating fins which are fixed on one sideof the copper plates. The beneficial effects are as follows: the system has a simple structure and low manufacturing lost; the copper plates increase the contact area with the surfaces of the batteries, make the temperature distribution on the surfaces of the batteries more uniform, separate the heat source from the phase change material module and overcome a series of safety problems caused by the leakage of the phase change material; and the system has a better heat dissipation function.

Description

technical field [0001] The invention relates to the technical field of hybrid electric vehicles, in particular to a hybrid heat management system for a separate power battery. Background technique [0002] The battery thermal management system has a crucial impact on the power performance of new energy vehicles. Effective cooling performance can improve the working environment and performance of the battery, thereby ensuring driving safety and reliability. Domestic and foreign researchers have carried out a lot of research on power battery cooling technology and battery thermal management, mainly focusing on the research and improvement of air cooling, water cooling, phase change material cooling and heat pipe cooling technologies. At present, the actual use of engineering is mainly air cooling And water cooling, but because phase change cooling has great advantages in improving battery temperature consistency, battery pack phase change materials and heat pipe cooling are ex...

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Problems solved by technology

[0003] In the existing research, the previous people filled the phase change material into the gap between the batteries or around the battery. When the heat generated by the battery during charging and discharging exceeds the melting point of the phase change material, the phase change material will leak. Thus affecting the related performance of the battery pack, this method will cause a series of problems

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