A power battery tab cooling system with exhaust gas

Abstract

The purpose of the present invention is to provide a power battery tab heat dissipation system that can discharge exhaust gas, including a battery core, a tab air cooling tube, a controller, an isolation frame, a heat soaking film, a lower liquid cooling plate, a side heat insulation plate, a bottom Insulation pads. After the cells are grouped, an isolation frame is set at the top, and a lower liquid cooling plate is set at the bottom; a pressure relief channel is set above the safety valve, and the thermal conductive glue filling groove on the isolation frame is set with thermally conductive insulating silica gel; The cooling tube, the pole ear air cooling tube and the pole ear busbar are provided with a heat soaking film; an exhaust valve is arranged on the air cooling tube, and a gas sensor is arranged in the module space. Based on the heat dissipation of the positive and negative pole lugs, the invention realizes the complementary advantages of air cooling and liquid cooling. The thermal management system has high space utilization, small heat exchange thermal resistance, and good cooling effect.

Description

technical field [0001] The invention relates to a power battery thermal management system. Background technique [0002] In recent years, accidents such as smoke, spontaneous combustion, and fire have occurred frequently in new energy vehicles. Power batteries, as their core components, are moving towards high energy density, long cruising range, short charging time, high safety, high space utilization, and light weight. The direction of development and long cycle life. [0003] In the safety accidents of new energy vehicles, thermal management problems are prominent. The air-cooled heat management system has simple structure, small footprint, light weight, low cost, low energy consumption, no harmful gas volume pressure, and easy maintenance. The outlet pressure difference is large, the flow field is uneven, the temperature uniformity is poor, and the cooling effect of high discharge rate is poor. The liquid-cooled heat management method has large specific heat capacity,...

AI Technical Summary

Problems solved by technology

The air-cooled thermal management system has simple structure, small space occupation, light weight, low cost, low energy consumption, no harmful gas volume pressure, and easy maintenance, but the air thermal conductivity is low, the convective heat transfer coefficient is small, the time required for heat dissipation is long, and the Large outlet pressure difference, uneven flow field, poor temperature uniformity, high discharge rate and poor cooling effect

The liquid-cooled heat management method has large specific heat capacity, high thermal conductivity, large heat transfer coefficient, thin boundary layer, strong heat transfer capacity, integrated heat dissipation and preheating, and good temperature uniformity, but it is large in size, heavy in weight, easy to leak, and expensive High, high sealing and insulation requirements (direct liquid cooling), high energy consumption of auxiliary components, complex system

[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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