A liquid-cooled thermal management system for a power battery and an inflatable aluminum vapor chamber

Abstract

The invention relates to a liquid-cooled thermal management system for a power battery, which includes a module casing, in which several stacked battery cells are arranged, and a water-cooled plate is respectively arranged on both sides of the several stacked battery cells, each Each battery cell corresponds to an inflatable vapor chamber, and the battery cell and the inflatable vapor chamber are arranged at intervals. On the basis of effectively ensuring the temperature uniformity and suitable working temperature of large-scale power battery cells, the present invention takes into account the battery mold The thermal runaway and spreading problems of the group can be solved, and the simple assembly method can not only meet the tight fit between the components. An inflatable aluminum vapor chamber, comprising a vapor chamber body and bending sections respectively located on both sides of the chamber body, the two bending sections are bent in the same direction, and the middle and lower part of the chamber body is a reservoir The liquid area has high thermal conductivity, good temperature uniformity, and the specific surface area is much larger than that of ordinary heat pipes. It can be integrally formed, easy to process and low in cost, and is suitable for the needs of the battery pack thermal management system.

Description

technical field [0001] The invention relates to the field of power batteries, in particular to a liquid-cooled thermal management system for a power battery and an inflatable aluminum vapor chamber. Background technique [0002] Faced with increasingly stringent environmental protection requirements and the inherent advantages of electric vehicles in terms of intelligence, new energy vehicles have been increasingly valued by countries around the world, and major car companies have accelerated the pace of development of pure electric vehicles. However, electric vehicles have not yet completely got rid of "range anxiety". Before the power battery technology has made a major breakthrough, the current mainstream lithium-ion batteries used in new energy vehicles, especially pure electric vehicles, need to meet high energy density, high power density requirements. However, both of these aspects pose serious challenges to the thermal management of large power battery packs. The c...

AI Technical Summary

Problems solved by technology

However, electric vehicles have not yet completely got rid of "range anxiety". Before the power battery technology has made a major breakthrough, the current mainstream lithium-ion batteries used in new energy vehicles, especially pure electric vehicles, need to meet high energy density, high Power Density Requirements

However, both of these aspects pose serious challenges to the thermal management of large power battery packs

The current mainstream square-shell type power cells use the bottom water-cooled plate for heat dissipation, which has limitations such as small heat dissipation area and large temperature difference between cells, and it is difficult to meet the heat dissipation requirements of higher energy density cells and higher charge-discharge rate working conditions in the future. need

A small number of electric vehicles such as Tesla and Jianghuai use serpentine water-cooling pipes arranged on the side of the cylindrical power cell cylinder to achieve better thermal management effects, but it poses extremely high requirements for assembly processes and parts processing. challenges, and because there are many water-cooling pipelines, the connection and sealing requirements of the pipelines are difficult to be guaranteed, and there is a high risk of coolant leakage, which greatly affects the safety of the vehicle

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