KR-20260066503-A - CYLINDRICAL BATTERY MODULE AND DEVICE INCLUDING THE SAME

KR20260066503AKR 20260066503 AKR20260066503 AKR 20260066503AKR-20260066503-A

Abstract

A cylindrical battery module according to one embodiment of the present invention comprises a plurality of plate-shaped battery cells, each having an electrode lead protruding from both ends, a central axis to which the sides of the plurality of plate-shaped battery cells are fixed, and a cylindrical case that accommodates the plurality of plate-shaped battery cells and the central axis, wherein the plurality of plate-shaped battery cells are fixed radially around the central axis, and the central axis comprises a circular tube and a passage inside the circular tube, and the circular tube has a plurality of venting doors formed corresponding to each of the plurality of plate-shaped battery cells to discharge gas generated from the plurality of plate-shaped battery cells.

Inventors

이범희

Assignees

주식회사 엘지에너지솔루션

Dates

Publication Date: 20260512
Application Date: 20241104

Claims (10)

A plurality of plate-shaped battery cells, each having electrode leads protruding from both ends, A central axis to which the sides of the plurality of plate-shaped battery cells are fixed, and It includes the above-mentioned plurality of plate-shaped battery cells and a cylindrical case accommodating the central axis, The plurality of plate-shaped battery cells are fixed radially around the central axis, and The above central axis includes a circular tube and a passage inside the circular tube, and A cylindrical battery module having a plurality of venting doors formed in the above circular tube, corresponding to each of the plurality of plate-shaped battery cells, through which gas generated from the plurality of plate-shaped battery cells is discharged.
In paragraph 1, A cylindrical battery module in which a cooling plate is inserted between adjacent plate-shaped battery cells among the plurality of plate-shaped battery cells.
In paragraph 1, The above passage is a cylindrical battery module that is in communication with the outside and is a cooling channel through which a refrigerant supplied from the outside passes.
In paragraph 1, The above venting door is a cylindrical battery module comprising a door portion that opens inwardly into the circular tube by external pressure and a hinge portion that fixes the door portion to the circular tube.
In paragraph 1, Each of the above plurality of plate-shaped battery cells is a cylindrical battery module including a venting guide formed at a position corresponding to the venting door.
In paragraph 5, Each of the above plurality of plate-shaped battery cells includes an electrode assembly and a pouch case that accommodates the same, and The above pouch case is formed along at least a portion of the edge of the pouch case and includes a sealing portion formed by heat-sealing the pouch case. The above venting guide is a cylindrical battery module formed in the above sealing portion.
In paragraph 1, A cylindrical battery module having donut-shaped terminal covers connected to the electrode leads disposed at both ends of the cylindrical case.
In Paragraph 7, Cylindrical battery modules having different polarities of the terminal covers disposed at each of the two ends.
In Paragraph 3, The above refrigerant is an insulating fluid with fire extinguishing performance, in a cylindrical battery module.
A device comprising a cylindrical battery module according to claim 1.

Description

Cylindrical battery module and device including the same The present invention relates to a cylindrical battery module and a device including the same, and more specifically, to a cylindrical battery module and a device including the same in which cooling efficiency is improved and safety is enhanced by implementing the cylindrical module with plate-shaped battery cells. Rechargeable batteries are attracting significant attention as an energy source for various product categories, including mobile devices and electric vehicles. As a promising energy resource capable of replacing conventional products that use fossil fuels, these batteries are gaining prominence as an eco-friendly energy source because they do not generate byproducts during use. Recently, with the increasing need for high-capacity secondary battery structures, including their utilization as energy storage sources, there is a growing demand for battery packs with a multi-module structure that aggregates battery modules in which multiple secondary batteries are connected in series or parallel. Meanwhile, when configuring a cylindrical battery module by connecting multiple battery cells in series or parallel, it is common practice to configure a battery module consisting of at least one battery cell and to configure a battery pack by adding other components using this at least one battery module. When configuring a battery module using multiple battery cells, the module is generally constructed in the shape of a rectangular prism due to design issues such as battery pack layout, busbar structure, or busbar length efficiency. In this case, plate-shaped battery cells are stacked in one direction to form a rectangular prism shape. When applying a cooling path to cool the battery cells arranged in this way, the path must be placed on the outermost surfaces, such as the top, bottom, and sides of the rectangular prism. However, in this arrangement, there is a problem in that it is difficult to efficiently cool battery cells located far from the cooling path. Furthermore, because the battery cells are densely packed in close proximity, not only is it difficult to increase cooling efficiency, but heat propagation between battery cells also occurs easily. Consequently, if a high temperature occurs in one battery cell, heat and gas rapidly propagate to adjacent battery cells. Furthermore, in order to vent gases generated from the battery cells, a venting hole or venting channel must be configured separately from the cooling path, which can complicate the structure of the battery module or battery pack and increase costs. Therefore, a new batch of battery modules is required to achieve more efficient cooling of the battery cells and exhaust of venting gases. FIG. 1 is a perspective view showing a cylindrical battery module according to one embodiment of the present invention. Figure 2 is a drawing showing the state in which the cylindrical case and terminal cover have been removed from the cylindrical battery module of Figure 1. Figure 3 is a drawing showing a cross-section along III-III' of Figure 1. Figure 4 is a diagram showing the battery cell and the central axis in Figure 2. Figure 5 is a cross-sectional view showing an enlarged view of the venting door portion of the central axis in Figure 4. Figure 6 is a drawing to explain how the terminal cover is combined in Figure 2. The embodiments described below are presented as examples to aid in understanding the invention, and it should be understood that the invention may be implemented with various modifications different from the embodiments described herein. However, in describing the invention, detailed descriptions and specific illustrations of related known functions or components are omitted if it is determined that such detailed descriptions or specific illustrations might unnecessarily obscure the essence of the invention. Furthermore, the attached drawings are not drawn to actual scale to aid in understanding the invention, and the dimensions of some components may be exaggerated. The first and second terms used in this application may be used to describe various components, but the components should not be limited by the terms. The terms are used solely for the purpose of distinguishing one component from another. Furthermore, the terms used in this application are used merely to describe specific embodiments and are not intended to limit the scope of the rights. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this application, terms such as “comprising,” “consisting of,” or “consisting of” are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof. Hereinafter, the configurat