Power battery tab heat dissipation system based on coupling of phase change material and U-shaped flat heat pipe

Abstract

The invention aims to provide a power battery tab heat dissipation system based on coupling of a phase-change material and a U-shaped flat heat pipe. The power battery tab heat dissipation system comprises a battery cell, a flexible busbar, a phase-change material module, a U-shaped flat heat pipe, an isolation frame, a soaking film, a lower liquid cooling plate and a bottom heat insulation pad. The battery cells are connected through a soft row and then are fixed into a group through a left end plate, a right end plate and peripheral fastening bandages; an isolation frame is arranged at the upper part of the battery module and is adhered to the top surface of the battery cell through structural adhesive; the isolation frame is provided with a front channel, a middle channel and a rear channel, the front channel and the rear channel are provided with U-shaped flat heat pipes, the horizontal section of each U-shaped flat heat pipe is an evaporation end, and the vertical section is a condensation end. A bottom soaking film, a lower liquid cooling plate and a heat insulation pad are sequentially arranged at the bottom of the cell from top to bottom. Based on the combined heat dissipation of the tabs and the bottom of the battery cell, the phase change material, the heat pipe and the liquid cooling technology are coupled, the space utilization rate is high, the heat dissipation effect is good, and the temperature uniformity is good.

Description

technical field [0001] The invention relates to a power battery thermal management system. Background technique [0002] In recent years, the international and domestic new energy vehicle industries have developed rapidly, and the electrification and intelligence of vehicles has become an inevitable development trend. However, accidents such as smoke, spontaneous combustion, and fire of new energy vehicles occur frequently. As its core component, the power battery is developing in the direction of high energy density, long cruising range, short charging time, high safety, high space utilization, light weight, and long cycle life. [0003] Air-cooled heat management method has low air thermal conductivity, small convective heat transfer coefficient, long time required for heat dissipation, large pressure difference between inlet and outlet, uneven flow field, poor temperature uniformity, and poor cooling effect at high discharge rate; liquid cooling heat management method Th...

AI Technical Summary

Problems solved by technology

[0004] At present, the vast majority of power batteries are composed of positive electrodes, diaphragms, negative electrodes and battery casings, and the thermal conductivity of the diaphragm material is low, and the thermal resistance from the inside of the cell to the vertical surface is large, and the thermal conductivity is poor. bad

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