KR-102964269-B1 - BATTERY MODULE AND BATTERY PACK INCLUDING THE SAME

Abstract

A battery module according to one embodiment of the present invention comprises a plurality of battery cell stacks and a module frame having a molding portion on which the plurality of battery cell stacks are mounted, wherein each of the plurality of battery cell stacks is accommodated in a unit storage portion of the module frame partitioned by the molding portion.

Inventors

• 김관우
• 성준엽

Assignees

• 주식회사 엘지에너지솔루션

Dates

Publication Date

20260512

Application Date

20201026

Claims (11)

1. A plurality of battery cell stacks, and The above plurality of battery cell stacks are mounted and the module frame having a molding section is included, Each of the plurality of battery cell stacks is accommodated in the unit storage portion of the module frame partitioned by the molding portion, and The above-mentioned molding part includes two side parts spaced apart from each other and a connecting part connecting them, The two side portions of the molding part are surfaces perpendicular to the stacking direction of the battery cells included in the plurality of battery cell stacks, and The above two side portions are a battery module spaced apart in the stacking direction of the battery cells.
2. delete
3. In paragraph 1, The above connecting portion is a battery module that connects the two side portions spaced apart from each other at the upper portions of the side portions.
4. In Paragraph 3, The above connection is a battery module having a convex curved surface at the top.
5. delete
6. In paragraph 1, The above module frame includes a plurality of bottom parts and left and right side parts, and The above plurality of bottom portions are battery modules connected by the molding portion.
7. In paragraph 6, A battery module in which the plurality of bottom portions, the left and right side portions, and the molding portion are integrally formed.
8. In paragraph 6, A battery module further comprising a compression pad located between the side portion of the module frame and the outermost battery cell included in the battery cell stack.
9. In paragraph 6, A battery module further comprising a compression pad located between the molding portion and the outermost battery cell included in the battery cell stack.
10. In paragraph 1, A battery module in which a small unit battery cell stack accommodated in the above unit storage section is separated from an adjacent small unit battery cell stack by the above molding section.
11. A battery pack including a battery module according to paragraph 1.

Description

Battery module and battery pack including the same The present invention relates to a battery module and a battery pack including the same, and more specifically, to a battery module that controls cell swelling and a battery pack including the same. 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 battery pack 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 the battery pack by adding other components using this at least one battery module. Such a battery module may include a battery cell stack having a plurality of battery cells stacked thereon, a module frame accommodating the battery cell stack, and a compression pad formed between the module frame and the outermost battery cell of the battery cell stack or between a plurality of battery cells. FIG. 1 is a perspective view showing a conventional battery module. FIG. 2 is a cross-sectional view showing the A-A' portion of FIG. 1. FIG. 3 is a drawing showing the swelling phenomenon of the battery cell of FIG. 2. Referring to FIGS. 1 and 2, a conventional battery module comprises a battery cell stack (10) in which a plurality of battery cells (11) are stacked, a module frame (20) that accommodates the battery cell stack, an upper plate (30) that covers the upper part of the battery cell stack (10), a thermally conductive resin layer (40) located between the bottom part of the battery cell stack (10) and the module frame (20), and a compression pad (50) located between the plurality of battery cells (11) and/or between the outermost battery cell (11) and the module frame (20). The compression pad (50) can be formed to cover most of the side of the module frame (20) corresponding to the battery cell (11). At this time, when swelling occurs in the battery cells (11), the battery cells (11) may swell as shown in FIG. 3. In the past, even if the compression pad (50) is pressed and compressed, there was a minimum compression thickness (w) at which further compression of the compression pad (50) was not achieved, so there was a problem in that it was difficult to respond flexibly to the swelling phenomenon of the battery cells (11). FIG. 1 is a perspective view showing a conventional battery module. Figure 2 is a cross-sectional view taken along the cutting line A-A' of Figure 1. Figure 3 is a diagram showing the swelling phenomenon of the battery cell of Figure 2. FIG. 4 is a perspective view of a battery module according to one embodiment of the present invention. Fig. 5 is an exploded perspective view of the battery module of Fig. 4. Figure 6 is a drawing illustrating the module frame of Figure 5. Figure 7 is a drawing showing a battery cell stack mounted inside the module frame of Figure 6. FIG. 8 is a drawing showing a battery cell stack mounted within a module frame included in a battery module according to another embodiment of the present invention. 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 plate is said to be "on" or "on" another part, this includes not only the case where it is "directly above" the other part, but also the case where there is another part in between. Conversely, when a part is said to be "directly above" another part, it means that there is no other part in between. Also, saying that a p