Partial cooling battery module suitable for softly-packaged lithium ion battery

Abstract

The invention discloses a partial cooling battery module suitable for a softly-packaged lithium ion battery. The partial cooling battery module comprises a shell and multiple single batteries, wherein the multiple single batteries are arranged in the shell in a laminated manner; the partial cooling battery module also comprises a tab cooling apparatus, packing belts and a bottom cooling apparatus; and the sealing edges of the single batteries are tightened in a tab through slot of the tab cooling apparatus and a cooling through slot of the bottom cooling apparatus through the packing belts. According to the partial cooling battery module, more heat generated by the tabs can be exported, so that the battery tabs can be effectively cooled, and the soaking performance and the radiating performance of the battery pack can be improved; and in addition, mutual extrusion of the batteries caused by expansion due to heat generated in operation can be avoided, so that the safety of the battery can be improved.

Description

technical field [0001] The invention relates to the technical field of large-capacity lithium-ion batteries, in particular to a method for stacking and integrating multiple flexible-packaged lithium-ion battery cells, and in particular to a battery module structure capable of cooling the batteries locally. Background technique [0002] With the advancement of science and technology and the enhancement of human environmental protection awareness, the green energy industry at home and abroad has entered a stage of rapid development. The electric vehicle industry, communication industry and some special industries have begun to widely use high-energy and high-power lithium ions. The battery is used as the power source, and puts forward high requirements on the weight ratio, volume ratio and safety of the power module. For a long time, people have been conducting various studies on the safety of batteries, the packaging structure of battery packs, and production efficiency. [...

AI Technical Summary

Problems solved by technology

However, because the outer packaging of flexible lithium-ion battery cells is a layer of aluminum-plastic film, the entire cell is relatively soft, which reduces the compactness of the battery, and the cell packaging film is easily punctured, reducing its safety. Effectively protecting the integrity of the cell packaging film and ensuring the compactness of the battery has become a key problem to be solved in the design of the battery pack packaging structure

[0004] On the other hand, in the process of high-current charging and discharging, due to the heating of the battery, the heat accumulation of the battery pack will lead to a decrease in the consistency of the battery and expansion of the battery core, which affects the consistency and balance of each battery after the battery is grouped. important indicators, thereby reducing the cycle life of the battery

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