KR-102963876-B1 - BATTERY PACK AND DEVICE INCLUDING THE SAME

KR102963876B1KR 102963876 B1KR102963876 B1KR 102963876B1KR-102963876-B1

Abstract

The present invention comprises a battery pack and a device including the same. A battery pack according to one embodiment of the present invention comprises at least one battery module including a battery cell stack having a plurality of battery cells stacked thereon and a module frame housing the battery cell stack; a first pack frame for mounting the battery module; a second pack frame positioned to cover the battery module; and a venting portion provided on one surface of the first pack frame, wherein the venting portion communicates with a venting path formed by a plurality of partition members located on the first pack frame.

Inventors

민진기
김세호
임상욱

Assignees

주식회사 엘지에너지솔루션

Dates

Publication Date: 20260511
Application Date: 20221123

Claims (15)

At least one battery module comprising a battery cell stack having a plurality of stacked battery cells, and a module frame housing the battery cell stack; A first pack frame for mounting the above battery module; A second pack frame positioned while covering the above battery module; and It includes a venting portion provided on one side of the first pack frame, and The above venting section is in communication with a venting path formed by a plurality of bulkhead members located on the first pack frame, and The second pack frame and the bulkhead member are joined and fixed by a connecting member, The above coupling member is a battery pack that is inserted into a coupling portion, which is a groove provided on one surface of a partition member facing the second pack frame, while penetrating the second pack frame.
In paragraph 1, The first pack frame includes a side frame protruding from the bottom surface of the first pack frame along the edge of the first pack frame toward the second pack frame, and The plurality of partition members are a battery pack located between the battery module and the side frame.
In paragraph 2, The plurality of partition members are positioned to correspond to each other between the first side of the battery module and the first side frame facing the first side, and between the second side of the battery module and the second side frame facing the second side. The first side and the second side are two sides of the battery cell stack facing each other along the stacking direction of the battery cell stack, forming a battery pack.
In Paragraph 3, The above partition member is a battery pack positioned parallel to the first side and the second side of the battery module, and the first side frame and the second side frame.
In Paragraph 3, One end of the above bulkhead member is in contact with a third side frame, which is a side frame perpendicular to the first side frame and the second side frame, and The other end of the partition member adjacent to the above-mentioned partition member contacts the fourth side frame, which is the remaining side frame facing the third side frame, in a battery pack.
In paragraph 5, The plurality of partition members are battery packs alternately positioned between the battery module, the first side frame, and the second side frame.
In paragraph 6, The above plurality of partition members form a zigzag-shaped venting path in a battery pack.
In paragraph 1, The above bulkhead member is a battery pack comprising a first surface facing the second pack frame, and a recessed portion having a portion of a second surface and a third surface perpendicular to the first surface.
In paragraph 8, A filler member is located in the above-mentioned concave portion, and The width of the above filler member corresponds to the distance between the second surface and the third surface of the above bulkhead member, and A battery pack in which the height of the above filler member corresponds to the vertical distance between the first surface and the concave portion.
In Paragraph 9, A battery pack comprising at least one hole penetrating one surface of the filler member parallel to the second surface of the partition member and the other surface of the filler member parallel to the third surface of the partition member.
In Paragraph 9, The above filler member is a hollow battery pack.
In Paragraph 9, The above filler member is a battery pack made of a thermoplastic material.
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In paragraph 1, A battery pack further comprising a sealing member interposed between the above partition member and the above second pack frame.
A device comprising a battery pack according to any one of claims 1 through 12 and 14.

Description

Battery pack and device including the same The present invention relates to a battery pack and a device including the same, and more specifically, to a battery pack with improved safety and a device including the same. With the technological development and increasing demand for mobile devices, the demand for secondary batteries as an energy source is rapidly rising. Accordingly, extensive research is being conducted on secondary batteries capable of meeting various requirements. Secondary batteries are attracting significant attention as an energy source not only for mobile devices such as mobile phones, digital cameras, and laptops, but also for power units such as electric bicycles, electric vehicles, and hybrid electric vehicles. Recently, with the increasing need for large-capacity secondary battery structures, including their utilization as energy storage sources, there is a growing demand for medium-to-large modular battery packs that aggregate battery modules in which multiple secondary batteries are connected in series or parallel. Meanwhile, when configuring a battery pack by connecting multiple battery cells in series or parallel, it is common practice to form a battery module consisting of at least one battery cell and to construct the battery pack by adding other components using at least one battery module. Since the battery cells constituting these medium-to-large battery modules are composed of rechargeable secondary batteries, such high-output, high-capacity secondary batteries generate a large amount of heat during the charging and discharging process. The above battery cells can be connected in series or parallel to form a battery pack. In this case, it is common practice to form a battery module consisting of at least one battery cell and to construct a battery pack by adding other components using at least one battery module. Since the battery cells constituting such medium-to-large battery modules are composed of rechargeable secondary batteries, such high-output, high-capacity secondary batteries generate a large amount of heat during the charging and discharging process. This can lead to thermal runaway, which may result in the generation of venting gas or flames inside the battery. Figure 1 is a diagram showing a venting path in a conventional battery pack. Referring to FIG. 1, the battery pack (10) is equipped with a venting section (15) that discharges venting gas or flame generated inside to the outside. However, in conventional battery modules, venting gas or flame generated moves along the edge of the battery pack without directionality and is discharged into the venting section (15), and the holes constituting the venting section are easily blocked by particles generated inside the battery, causing the internal pressure to rise. Therefore, it is necessary to solve this problem because the battery pack structure cannot withstand the internal pressure and collapses, and the flame is exposed to the outside and rapidly spread between battery modules. Figure 1 is a diagram showing a venting path in a conventional battery pack. FIG. 2 is a perspective view of a battery pack according to one embodiment of the present invention. FIG. 3 is an exploded perspective view of a battery pack according to one embodiment of the present invention. Figure 4 is a perspective view of the battery pack of Figure 2 seen in the -z-axis direction. FIG. 5 is a schematic diagram showing a battery pack according to another embodiment of the present invention. Figure 6 is an enlarged view showing the first area of Figure 5. FIG. 7(a) is a perspective view of a filler member. FIG. 7(b) is a cross-sectional view taken along B-B' of FIG. 7(a). FIG. 7(c) is a view of the filler member taken along the x-axis of FIG. 7(a). FIG. 7(d) is a view of the filler member taken along the y-axis of FIG. 7(a). FIG. 8 is a drawing showing the filler member of the present invention combined with the second pack frame. Hereinafter, various embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. The present invention may be embodied in various different forms and is not limited to the embodiments described herein. To clearly explain the present invention, parts unrelated to the explanation have been omitted, and the same reference numerals are used for identical or similar components throughout the specification. Furthermore, the size and thickness of each component shown in the drawings are depicted arbitrarily for convenience of explanation, and thus the present invention is not necessarily limited to what is illustrated. Thicknesses have been enlarged in the drawings to clearly represent various layers and regions. Additionally, for convenience of explanation, the thickness of some layers and regions has been exaggerated in the drawings. Furthermore, when a part such as a layer, membrane, region, or