Power battery thermal management system based on tab and module bottom combined liquid cooling heat dissipation

Abstract

The invention aims to provide a power battery thermal management system based on tab and module bottom combined liquid cooling heat dissipation. The power battery thermal management system comprises abattery cell, a positive tab, a negative tab, a connecting bar, a tab liquid cooling plate, an isolation frame, a soaking film, a bottom liquid cooling plate and a bottom heat insulation pad. The positive electrode and the negative electrode of the battery cell are connected through the connecting bar and are fixed into a group through the left end plate, the right end plate and the peripheral fastening bandages; an isolation frame is arranged at the upper part of the system and is adhered to the top surface of the battery cell through a structural adhesive, a soaking film is laid after the isolation frame is provided with front and rear channels to fill the heat-conducting adhesive, and a tab liquid cooling plate is arranged above the soaking film; and a lower liquid cooling plate, a bottom soaking film and a bottom heat insulation pad are sequentially arranged at the bottom of the battery cell from top to bottom. Based on battery cell tab and bottom combined liquid cooling heat dissipation, the system is compact in structure, high in temperature uniformity and good in heat dissipation effect; the upper liquid cooling plate and the lower liquid cooling plate clamp a module, thereby further strengthening the system reliability.

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 of electric vehicles have occurred 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] The air cooling 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 rates; thermal conductivity of phase change materials The efficiency is low, the phase change latent heat is small, the heat transfer is limited, additional volume is required, the mass is heavy, and the preheating problem of ...

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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