KR-20260063811-A - BATTERY PACK

KR20260063811AKR 20260063811 AKR20260063811 AKR 20260063811AKR-20260063811-A

Abstract

According to exemplary embodiments, a battery pack is provided. The battery pack comprises a lower frame including a base including a first plate and a second plate; a plurality of battery cells arranged in a first direction parallel to the first plate and on the second plate, wherein each of the plurality of battery cells comprises a cell case having an outlet facing the second plate, an outlet film on the lower surface of the cell case, and an electrode assembly within the cell case, and the second plate comprises a plurality of venting holes spaced apart from each other in the first direction, and each of the plurality of venting holes overlaps with the outlet of a corresponding one of the plurality of battery cells.

Inventors

박민수
정혜미
이정훈
김광모

Assignees

주식회사 엘지에너지솔루션

Dates

Publication Date: 20260507
Application Date: 20241031

Claims (14)

A lower frame including a base comprising a first plate and a second plate; and A plurality of battery cells arranged in a first direction parallel to the first plate and on the second plate, wherein Each of the plurality of battery cells comprises a cell case having an outlet facing the second plate, an outlet film on the lower surface of the cell case, and an electrode assembly within the cell case, and The second plate includes a plurality of venting holes spaced apart from each other in the first direction, and A battery pack characterized in that each of the plurality of venting holes overlaps with the outlet of a corresponding one of the plurality of battery cells.
In paragraph 1, A battery pack characterized in that the base comprises a plurality of partitions spaced apart in the first direction and located between the first and second plates.
In paragraph 2, The first plate, the second plate, and the plurality of partitions define a plurality of venting channels extending in a second direction parallel to the first plate and perpendicular to the first direction, and A battery pack characterized in that each of the plurality of venting channels is connected to a corresponding one of the plurality of venting holes.
In paragraph 3, A battery pack characterized in that the width of each of the plurality of venting holes in the first direction is greater than or equal to the width of each of the electrode assemblies in the first direction of each of the plurality of battery cells.
In paragraph 3, A battery pack characterized in that the length of each of the plurality of venting holes in the second direction is greater than or equal to the length of each of the electrode assemblies in the second direction of each of the plurality of battery cells.
In paragraph 3, A battery pack characterized in that the width of each of the plurality of venting channels in the first direction is greater than or equal to the width of each of the electrode assemblies in the first direction of each of the plurality of battery cells.
In paragraph 3, A battery pack characterized in that the length of each of the plurality of venting channels in the second direction is greater than or equal to the length of each of the electrode assemblies in the second direction of each of the plurality of battery cells.
In paragraph 3, A battery pack characterized in that the width of the discharge port in the first direction of the cell case of each of the plurality of battery cells is greater than or equal to the width of the electrode assembly in the first direction of each of the plurality of battery cells.
In paragraph 3, A battery pack characterized in that the length of the second direction of the discharge port of the cell case of each of the plurality of battery cells is greater than or equal to the length of the second direction of the electrode assembly of each of the plurality of battery cells.
In paragraph 3, A battery pack characterized in that the height of each of the plurality of venting channels in a third direction perpendicular to the first plate is at least 30% of the height of the electrode assembly in the third direction of each of the plurality of battery cells.
In paragraph 3, A battery pack characterized in that the height of each of the plurality of venting channels in a third direction perpendicular to the first plate is greater than the height of each of the electrode assemblies in the third direction of each of the plurality of battery cells.
In paragraph 3, A battery pack characterized in that the height of each of the plurality of venting channels in a third direction perpendicular to the first plate is at least 30% of the height of the cell case in the third direction of each of the plurality of battery cells.
In paragraph 3, A battery pack characterized in that the height of each of the plurality of venting channels in a third direction perpendicular to the first plate is greater than the height of each of the cell cases in the third direction of each of the plurality of battery cells.
In paragraph 1, A battery pack characterized in that the lower frame further includes a venting film covering the plurality of venting holes.

Description

Battery Pack The present invention relates to a battery pack. Unlike primary batteries, secondary batteries can be charged and discharged multiple times. Secondary batteries are widely used as energy sources for various wireless devices such as handsets, laptops, and cordless vacuum cleaners. Recently, as the manufacturing cost per unit capacity of secondary batteries has decreased dramatically due to improved energy density and economies of scale, and as the driving range of BEVs (battery electric vehicles) has increased to a level equivalent to that of fuel vehicles, the primary use of secondary batteries is shifting from mobile devices to mobility. The trend in the technological development of rechargeable batteries for mobility is the improvement of energy density and safety. The safety of rechargeable batteries is critical as it is directly linked to the lives of passengers. The safety of rechargeable batteries can be achieved through mechanical robustness, the reliability of electrical insulation, and the delay of heat transfer in the event of a thermal runaway. FIG. 1 is a cross-sectional view showing a battery pack according to exemplary embodiments. FIG. 2 is a perspective view showing a battery cell according to exemplary embodiments. FIG. 3 is a bottom view showing a battery cell according to exemplary embodiments. FIG. 4 is a cross-sectional view showing the effect of a battery pack according to exemplary embodiments. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Prior to this, terms and words used in this specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings. Instead, based on the principle that the inventor can appropriately define the concepts of terms to best describe his invention, they should be interpreted in a meaning and concept consistent with the technical spirit of the present invention. Therefore, the embodiments described in this specification and the configurations illustrated in the drawings are merely the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention; thus, it should be understood that various equivalents and modifications that can replace them may exist at the time of filing this application. In addition, in describing the present invention, if it is determined that a detailed description of related known components or functions may obscure the essence of the invention, such detailed description is omitted. Since embodiments of the present invention are provided to more fully explain the invention to those skilled in the art, the shapes and sizes of the components in the drawings may be exaggerated, omitted, or schematically depicted for clearer explanation. Accordingly, the size or proportion of each component does not entirely reflect the actual size or proportion. (1st and 2nd embodiments) FIG. 1 is a cross-sectional view showing a battery pack (100) according to exemplary embodiments. FIG. 2 is a perspective view showing a battery cell (120) according to exemplary embodiments. FIG. 3 is a bottom view showing a battery cell (120) according to exemplary embodiments. FIG. 4 is a cross-sectional view showing the effect of a battery pack according to exemplary embodiments. Referring to FIGS. 1 to 3, the battery pack (100) may include a lower frame (110), a plurality of battery cells (120), a plurality of cooling plates (130), an adhesive (140), a lead (150), and reinforcing plates (161, 163). The lower frame (110) may include a base (111), side walls (112, 113), and a venting film (115). The lower frame (110) may provide a space for mounting a plurality of battery cells (120). The lower frame (110) may include a first plate (111P1), a second plate (111P2), and a plurality of partitions (111S). The first plate (111P1) may be substantially parallel to the second plate (111P2). Two directions substantially parallel to the first plate (111P1) are defined as the X direction and the Y direction, and a direction substantially perpendicular to the first plate (111P1) is defined as the Z direction. The X direction, the Y direction, and the Z direction may be substantially perpendicular to each other. The first plate (111P1) and the second plate (111P2) may be spaced apart from each other. The first plate (111P1) and the second plate (111P2) may be spaced apart in the Z direction. A plurality of partitions (111S) may be interposed between the first plate (111P1) and the second plate (111P2). The plurality of partitions (111S) may be connected to each of the first plate (111P1) and the second plate (111P2). The plurality of partitions (111S) may be spaced apart from each other in the X direction. Each of the plurality of partitions (111S) may be substantially perpendicular to the X direction. The plurality of partitions (111S) may extend in the Y direction. The first plate (11